TITLE: Control-depth die-cuttable pressure-sensitive labels.
European Patent Application EP0377289 A2

ABSTRACT:
A cast extruded film suitable for controlled-depth die-cuttable label
face-stock comprising: a) from about 70 parts to about 30 parts of a
polypropylene homopolymer or a blend of polypropylene and at least one
other olefinic polymer, and b) correspondingly, from about 30 parts to
70 parts of an inorganic filler, wherein said polypropylene film is
controlled depth die-cuttable with a bearer force of not more than
about 120 kilograms, and has tensile and elongation at break values of
not more than 20,000 kilopascals and 750% respectively.

INVENTORS:
Morin, George Minnesota E. C. O. M.

APPLICATION NUMBER: EP19890312943
PUBLICATION DATE: 07/11/1990
FILING DATE: 12/12/1989

ASSIGNEE: MINNESOTA MINING & MFG (US)
INTERNATIONAL CLASSES: C08J5/18; C08K3/00; C08K3/16; C08K3/20; C08K3/34; C08L23/10; G09F3/02;
C08J5/18; C08K3/00; C08L23/00; G09F3/02; (IPC1-7): B31D1/02; C08L23/10;
G09F3/02
EUROPEAN CLASSES: G09F3/02

FOREIGN REFERENCES:
WO/1986/004547A1 COMPOSITE FACESTOCKS AND LINERS
FR2484115A1

OTHER REFERENCES:
DATABASE WPIL, accession nr. 88-002738 (01), Derwent Publications Ltd.,
London, GB; & JP-A-62 265 379 (TOYO SODA MFG KK) 18 November 1987

CLAIMS:
1. A cast-extruded film suitable for controlled-depth die-cuttable
label face-stock comprising: a) from 70 parts to 30 parts of a
polypropylene polymer selected from the group consisting of
polypropylene homopolymer and a blend of polypropylene and at least one
other olefinic polymer, and b) correspondingly, from 30 parts to 70
parts of an inorganic filler, wherein said film is controlled depth
die-cuttable with a bearer force of not more than 120 kilograms, and
has tensile and elongation at break values of not more than 20,000
kilopascals and 750% respectively.
2. A cast-extruded film suitable for controlled-depth die-cuttable
label face-stock according to claim 1 wherein said polypropylene
polymer is a blend of polypropylene homopolymer and an olefinic polymer
selected from the group consisting of poly(propylene-ethylene)
copolymers polyethylene homopolymers, and polyethylene-vinyl acetate
copolymers.
3. A cast-extruded film suitable for controlled-depth die-cuttable
label face-stock according to claim 2 wherein said polypropylene
homopolymer comprises from 50% to 100% of said blend.
4. A cast-extruded film suitable for controlled-depth die-cuttable
label face-stock according to claim 1 wherein said inorganic filler is
selected from the group consisting of calcium carbonate, metal oxides,
metal hydroxides, mica, talc, bentonite, magnesium silicone dioxide,
silicates, montmorillonite, barium sulfate and mixtures thereof, said
inorganic filler having a particle size of from 0.4 micrometer to 50
micrometers.
5. A cast-extruded film suitable for controlled-depth die-cuttable
label face-stock according to claim 1 wherein said inorganic filler
comprises at least about 40% calcium carbonate.
6. A controlled-depth die-cut label comprising a facestock according to
claim 1.
7. A controlled-depth die-cut label according to claim 6 wherein the
facestock is from about 50 micrometers to about 250 micrometers thick.
8. A controlled-depth die-cut label according to claim 6 further
comprising a topcoat, said topcoat comprising a polyethylmethacrylate
resin, said label being printable.
9. A controlled-depth die-cut label according to claim 11 having at
least a potion thereof coated with a pressure-sensitive adhesive.
10. A release-liner comprising the film of claim 1, at least a portion
of said film being coated with a release agent.

DESCRIPTION:
CONTROL-DEPTH DIE-CUTTABLE PRESSURE-SENSITIVE LABELS Background of the
Invention
Pressure-sensitive adhesive labels are well known in the art. Such
labels typically consist of a surface layer of material, called
facestock, backed by a layer of pressure-sensitive adhesive covered by
a release liner or carrier web. The liner or web serves two purposes.
It protects the adhesive during shipment and storage, and also allows
for efficient handling and dispensing of individual labels.
Although labels may be supplied as discrete items, high-speed
production lines are typically designed to use large rolls of liner
carrying individually die-cut labels. When such rolls of labels are
desired, the liner must remain uncut, and the process by which the
labels are cut without disturbing the liner is referred to as
"controlled depth die-cutting".
The labels may then be dispensed in either of two ways. In one method,
the liner is bent by drawing across an edge under tension, which
releases a portion of the label from the liner (the label is generally
less flexible than the liner). The separated portion is then contacted
directly with a substrate, or manually transferred from the liner. The
second method involves simply manually peeling an individual label from
the liner and applying it to a substrate.
The ability of a label to be processed by controlled depth die-cutting
is dependent on the type and thickness of the material from which the
facestock is formed as well as the integrity of the liner.
Many label applications further require that the facestock be of a
polymeric film material in order to provide a product having properties
such as weatherability, strength, water resistance,
abrasion-resistance, and gloss.
As stated, the integrity of the liner is also important for these
operations. Typically, the release liner for controlled depth
die-cutting is silicone coated and may be a paper, e.g., semi-bleached,
supercalendered, (18 to 27 kilograms per 280 kilograms basis) papers.
Films such as biaxially oriented polyester, uniaxially and biaxially
oriented polypropylene, and polymer coated papers may also be used.
U. S. Pat. 4,447,479 (Harrison), issued May 8, 1984, discloses a
"cardboard like" plastic sheet material from 0.1-1.2 mm in thickness,
comprising 5-70 parts of inorganic particulate material and,
correspondingly, 95-30 parts of a polyolefin resin selected from
polypropylene, propylene-ethylene sequential copolymers,
propylene-ethylene random copolymers, high density polyethylenes and
mixtures thereof. A propylene-ethylene sequential copolymer is defined
as a type of copolymer which is made by first polymerizing propylene,
and then, prior to the completion of the polymerization reaction,
injecting ethylene into the polymerization zone so that as the
polymerization proceeds, polymer chains are produced which become
increasingly rich in ethylene, randomly distributed (see column 2,
lines 31-52) and copolymerized.
The compounding is carried out to generate a mass having a melt flow
index of between 0.55 and 2.2 g/10 minutes at 230 DEG C under a load of
2.16 kg. The material is subsequently converted into a sheet by
standard processing methods. This "card-board like" material is
inherently inflexible and therefore not suitable for label face-stock.
Polypropylene homopolymer is disclosed to be usable in the flexible
sheeting of Harrison only when blended with a rubber compound. Various
suitable inorganic particulate materials are disclosed as useful,
including talc, calcium carbonate, dolomite, kaolin and gypsum, with
talc and calcium carbonate being the preferred inorganics.
PCT International Publication WO 86/04547, published August 14, 1986
(Freedman), discloses film-forming means which are coextruded to form
all-plastic multilayer liners and facestocks for pressure-sensitive
labels, decals and other products formed from sheet and roll stock. A
filler in the charges for the liner coextrusion differentially affects
the roughness of the liner forms. Mica is disclosed to be the preferred
filler, and comprises from about 10% to about 40% of the core layer.
U.S. Pat. No. 4,587,158 (Ewing) issued May 6, 1986 discloses a
deformable label system composed of low or medium density polyethylene
film which is corona treated to accept print. While the possible film
thickness is disclosed to be 12.5 micrometers (0.5 mil) to 125
micrometers (5 mils), it is conceded that not all combinations of
thickness and polyethylene are useful (see column 6, lines 6, 44). The
density of the polyethylene must be "matched" with the thickness of the
film to be useful as claimed in Ewing. Thus a film with low density
polyethylene, e.g., 0.91 g/cc may not be useful in films which are less
than 50 micrometers (2 mils) thick or over 125 micrometers (5 mils)
thick.
Likewise, a film of medium density polyethylene may be useful only at
thicknesses of between 12.5 micrometers (0.5 mil) and 75 micrometers (3
mils). The preferred range of utility is the use of polyethylene having
densities of between 0.915 g/cc and 0.935 g/cc in films of from about
50 micrometers (2 mils) to 75 micrometers (3 mils). High density
polyethylene films are not deemed to be useful in the deformable label
system.
U.S. Pat. No. 4,273,816 (Tollette) issued June 6, 1981 discloses a
multi-layer flexible label system having an outer layer of either
polyethylene, polypropylene or polyester and an inner layer of
polyethylene foam.
U.S. Pat. No. 4,060,168 (Romagnoll), issued on November 29, 1977,
discloses a label assembly including strip of backing material with a
series of printed labels. The backing material includes a die-cut
portion opposed to the label which remains adhered to the label upon
application of the label to a container.
U.S. Pat. No. 4,582,736 (Duncan) issued April 15, 1986 discloses a
pressure-sensitive adhesive label stock material. The facing layer of
the material comprises a laminate of (1) a thermoplastic polymer matrix
substrate layer incorporating a strata of voids, and (2) a void-free
skin layer substantially concealing the surface irregularities of the
substrate layer. A substantial number of the voids in the substrate
layer are stated to have positioned therein at least one spherical
void-initiating particle which is phase distinct and incompatible with
the matrix material. The particle may be organic or inorganic in
nature, and preferably is from about 0.1 to about 10 in size, and may
be present in up to about 20% of the substrate layer. Opacifying
pigments such as titanium dioxide and zinc oxide may also be present in
amounts of from 1 to 3% by weight.
U. K. Patent 1,044,028, published September 28, 1966 discloses filled
polyolefin compositions comprising 5% to 90% of a high molecular weight
polyolefin, particularly polyethylene, from 5% to 90% of inert filler
material and 5% to 90% of plasticizer. The polyolefin must have a
molecular weight sufficiently high to give it a standard load melt
index of substantially zero. Polyethylenes of the high density type
(0.93 to 0.97) are preferred; however, other high molecular weight
polyolefins are mentioned in passing, including low density
polyethylenes, polypropylene, and copolymers of ethylene and butylene.
Fillers described as useful include carbon blacks, metal oxides and
hydroxides, silica and hydrated silicas, especially aluminum oxide and
hydroxide, metal carbonates and metal silicates and aluminates,
naturally occurring clays and mica, precipitated silicates, synthetic
zeolites, inorganic salts, acetates, sulfates, phosphates, nitrates and
sugar.
The compositions are disclosed to be useful for applications including
molding resins, liners for roofing, lubricating bearings, and porous
films and molded items (when some or all the plasticizer and filler
have been extracted with an organic solvent or water). Use of the
compositions as labels, or the like are not disclosed.
The use of polypropylene film as a facestock for pressure-sensitive
labels has been generally limited to biaxially oriented polypropylene
(BOPP) films. These films are usually transparent, and, if colored,
have a low degree of opacity unless vacuum metallized. Up to now, the
pressure-sensitive BOPP film label stocks have not enjoyed a large
market share despite the low cost potential of polypropylene film
labels.
Unoriented polypropylene films, which also offer significant cost and
feature advantages, have rarely been used in pressure-sensitive label
stocks destined for the high volume label business. The unoriented film
is usually tough, and has an unusual type of extensibility which
results in poor characteristics for control depth die-cutting. This is
a severe limitation since a very high percentage of the
pressure-sensitive labels are produced using the required controlled
depth die-cutting process. It is this process that produces the die-cut
labels on a continuous liner for efficient, automatic, high speed
dispensing of pressure-sensitive labels in modern manufacturing plants.
There remains a need for a low cost polypropylene film facestock for
the label business without the above mentioned disadvantages.
Surprisingly, Applicant has now discovered that a cast-extruded, highly
filled film comprising a poly propylene homopolymer or a blend of
polypropylene and other olefinic polymer can be used as a facestock in
controlled depth die-cuttable label stock with a low bearer force of
about 120 kilograms. Summary of the Invention
The present invention provides a cast extruded film suitable for
controlled-depth die-cuttable label face-stock comprising: a) from
about 70 parts to about 30 parts of a polypropylene homopolymer or a
blend of polypropylene and at least one other olefinic polymer, and b)
correspondingly, from about 30 parts to 70 parts of an inorganic
filler, whereby said polypropylene film is controlled depth
die-cuttable with bearer force of not more than about 120 kilograms,
has a tensile and elongation at break of not more than 20,000
kilopascals and 750% respectively.
The polypropylene homopolymer preferably has a melt index of from about
1 gram per 10 minutes to about 1500 grams per 10 minutes, preferably
from about 2 grams per 10 minutes to about 50 grams per 10 minutes,
when tested according to the American Society of Test Methods
ASTM-D-1238, Condition L.
The film label face-stock preferably has a thickness of about 25
micrometers to about 250 micrometers, more preferably of about 50
micrometers to about 125 micrometers.
The present invention further comprises a controlled depth die-cuttable
pressure-sensitive adhesive label stock comprising a filled
polypropylene facestock, and a pressure-sensitive adhesive carried on a
release liner.
The polypropylene film described above is also useful as a facestock in
full-depth die-cuttable pressure-sensitive adhesive label stock and as
a dimensionally stable, full and controlled depth die-cuttable release
liner when coated with a release agent such as silicone.
The film may have a high gloss surface or can be produced with varying
degrees of matte or textured surface finishes. Brief Description of the
Drawings
The invention may be more clearly understood by reference to the
drawings, wherein: Figure 1 is a top elevation view of a control-depth
die-cutting station. Figure 2 is a side elevation view of the control
depth die-cutting station, complete with a roll of film stock in the
process of die-cutting. Figures 3 and 4 are cross-sectional views of
the die-cutting process. Figure 3 shows ideal die-cutting conditions;
Figure 4 shows undesirable conditions. Detailed Description of the
Invention
As shown in Fig. 1, a die roll (11) and an anvil roll (21) are
positioned as normally used in a control-depth die-cutting station.
Each of these rolls is driven at a speed consistent with the lineal web
speed of the pressure-sensitive label stock via gears attached to the
shafts (12) and (22) of the rolls. The anvil roll shafts (22) are
fitted into lubricated bearings which are firmly attached to the
framework of the die-cutting station. The die roll shafts (12) are
fitted into lubricated bearings which essentially float so that the
forces between the die roll bearers (13) and the anvil roll face (23)
can be controlled and optimized. The die roll bearers (13) contact the
anvil roll face (23) to maintain a fixed distance between the die roll
cutting edges (14) and the anvil roll face (23).
This fixed distance is usually equal to the thickness of the release
liner (37) used in the pressure-sensitive label stock being die-cut.
A definite pressure is required to perform the cutting/crushing action
of the die roll cutting edges (14). therefore, forces must be used to
press the die roll bearers (13) into complete contact with the anvil
roll face (23). These forces are generally applied to the bearers (13)
using screw pressure to force a set of double rollers against each
bearer (13). The bearer forces listed in this patent were measured
using load cells placed between each pressure inducing screw and each
set of double rollers.
Fig. 2 depicts a simplified sketch of the die-cutting process. The die
roll (11), anvil roll (21) and the die roll cutting edges (14) are
positioned as shown in Figure 1. The roll of pressure-sensitive label
stock (31) is control depth die-cut as it passes between the die roll
(11) and the anvil roll (21). The die-cut labels (33) and the waste
matrix (35) remain on the release liner (37) forming a die-cut
composite (39) until the waste matrix (35) is removed. One method of
removing the waste matrix (35) is to establish a separation using a
small diameter waste stripping roll (38). The waste matrix (35) is
wound onto the waste matrix wind-up roll (36) and the die-cut labels
(33) remain on the release liner (37) and proceed to the label wind-up
roll (32).
Figure 3 depicts a cross-section of materials depicting ideal
controlled depth die-cutting conditions. The pressure-sensitive label
stock (31) is shown contacting the anvil roll face (23). The die roll
cutting edge (14) is shown penetrating completely the facestock (33)
and the adhesive (34) leaving the release liner (37) undisturbed.
Figure 4 depicts a cross-section of materials depicting unsatisfactory
controlled depth die-cutting conditions. The pressure-sensitive label
stock (31) is shown contacting the anvil roll face (23) as in Figure 3.
However, the die roll cutting edge (14) has elongated the facestock
which becomes an extension of the die roll cutting edge and deforms the
release liner (37). In the case of Figure 4, there are no die-cut
labels produced. However, in borderline process conditions using paper
release liners, the liner deformity, which is mostly crushed or cut
paper fibers, causes the release liner to tear under conditions of
printing, die-cutting and dispensing of the labels.
The polypropylene facestock useful in labels of this invention is an
unoriented, cast-extruded film. The film may comprise 100% of a
polypropylene homopolymer or blends of polypropylene homopolymers, or
may comprise up to about 50%, preferably from about 10% to about 25%,
of another olefinic homopolymer or copolymer.
Useful olefinic homopolymers include polyethylenes, e.g., Chemplex TM
3404 available from Chemplex Corporation. Useful olefinic copolymers
include poly(propylene-ethylene) copolymers available as Dypro TM 9670
(2.8 to 3.2% of polyethylene), Dypro TM W-756 (3.3 to 3.8%
polyethylene), and Dypro TM 7771 from Fina Oil and Chemical Company,
and polyethylene/vinylacetate copolymers available as Norchem TM PE -
3010 (containing 9% vinylacetate) from Quatum Chemical, and Elvax 40W
TM (containing 40% vinylacetate) from E.I. DuPont de Nemours (DuPont).
Use of these additional polymers may effect the ease of die-cuttability
and the flexibility of the labels.
Polypropylene homopolymers useful for this invention have melt indices
ranging from about 1 to 1500 grams per 10 minutes (as measured by
ASTM-D-1238 Condition L), preferably from about 2 to 50 grams per 10
minutes. Homopolymers having melt indices outside this preferred range
are preferably present in blends with homopolymers having preferred
melt indices.
In these blends, the homopolymers having higher melt indices have a
positive effect on the die-cuttability of the pressure-sensitive
adhesive label facestock.
The label facestock further comprises from about 30 parts to about 70
parts by weight of an inorganic filler. Some inorganic fillers useful
in label facestocks include metal oxides or hydroxides, silicas,
barytes, metal silicates and carbonates, natural or synthetic zeolites
and natural or calcined clays. Preferred inorganic fillers include
calcium carbonate, mica, talc, bentonite, magnesium silicon dioxide,
silicates, montmorillonite and barium sulfate with calcium carbonate
being the most preferred. When it is desirable to use only a single
filler, calcium carbonate is highly preferred.
Where mixtures of inorganic fillers are desirably, e.g., for cost
considerations, other fillers are also useful. For example, calcium
carbonate, present as a main filler, can be combined with Montana talc
(a mixture of mainly silicone dioxide and magnesium oxide available
from Pfizer Minerals, Pigments and Metals Division) as a secondary
filler. Other useful secondary fillers include clay such as Polyfil TM
WC, a white anhydrous clay filler from J. M. Huber Corporation; Bartex
TM 65, barium sulfate from Hitox Corporation of America; Zinc oxide
XX-78 from Zinc Corporation of America; and Ceralox TM alumina from
Ceralox Corporation.
The preferred inorganic fillers have particle size distribution ranging
from about 0.4 micrometer to about 50 micrometers, preferably from
about 0.4 micrometer to about 14 micrometers.
Thickness of the filled polypropylene film facestock is from about 25
micrometers to about 250 micrometers depending on the application,
preferably from about 50 micrometers to about 125 micrometers.
For good controlled-depth die-cuttability, the film label facestock
preferably exhibits tensile at break of not more than about 20,000
kiloPascals, more preferably not more than about 18,000 kiloPascals,
and elongation at break of preferably not more than about 750%.
The label facestock may also contain pigments to achieve desired degree
of opacity and/or color and may typically contain from about 4 to about
20 parts by weight. Where translucent label facestocks are desired, a
lower amount of pigment is used. Useful pigments include titanium
dioxide, and phthalocyanine green 7.
The label facestock may also contain additives such as processing aids,
ultra-violet stabilizers, and antioxidants.
The label facestocks are typically printed. The printing may be done by
the conventional methods, including flexographic printing, screen
process, letter press or gravure printing methods. The addition of a
topcoat has been used to enhance the printability of prior art
facestocks. Useful top coats may be comprised of a resin such as
polyethylmethacrylate, e.g., Elvacite TM 2043, available from DuPont.
The label stocks are generally coated with this ink receptive layer
after corona treatment and just prior to printing.
The printability or ink receptivity of label stocks is measured by
testing for ink lay down and anchorage. The label facestock of the
present invention exhibits surprisingly improved ink receptivity, both
in ink lay down and anchorage, without further topcoat when used with a
variety of commercially available inks.
The labels are at least partially coated with a pressure-sensitive
adhesive. Useful pressure-sensitive adhesives include solvent-coatable,
hot-melt-coatable, radiation-curable (E-beam or UV curable) and
water-based emulsion type adhesives that are well-known in the art.
Specific examples of preferred types of adhesives include acrylic-based
adhesives, e.g., isooctyl acrylate/acrylic acid copolymers and
tackified acrylate copolymers; tackified rubber-based adhesives, e.g.,
tackified styrene-isoprene-styrene block copolymers; tackified
styrene-butadiene-styrene block copolymers; nitrile rubbers, e.g.,
acrylonitrile-butadiene; silicone-based adhesive, e.g., polysiloxanes;
and polyurethanes. As discussed above, pressure-sensitive label stocks
are commonly converted into individual pressure-sensitive labels using
a controlled depth die-cutting process.
Several varieties of dies are useful in this process. One common type
is the rotary die, which is used in conjunction with an anvil roll as
illustrated in Fig. 1. The cutting (or crushing) edge of the die, (14),
penetrates through the facestock, (31), and the adhesive, (34), as
showed in Fig. 3, during operation; for an optimum die-cutting process,
the release liner (37) is not penetrated or disturbed.
There are practical process limitations when using the typical
controlled depth rotary die. One important condition is the amount of
force applied to each of the bearers (13), as shown in Fig. 1. The
desirable force to the bearers will vary according to such factors as
die size, die design and the material being processed. A total force of
not more than about 120 kilograms, preferably not more than about 90
kilograms is recommended for the die described in preceding paragraphs.
Higher bearer forces may result in premature damage to the die-cutting
equipment, and poor control of label quality.
The die-cuttability is characterized by the Dye Penetration Test,
described infra, which indicates the condition of the liner. Liner
damage is due to penetration of the cutting edges of the die, and
occasionally, the facestock and adhesive into the liner after
die-cutting, the amount of damage being dependent on the degree of
penetration. After die-cutting the liner may be classified as follows:
Good - no obvious liner damage Satisfactory - very limited liner damage
Unsatisfactory - liner surface crushed or cut It is important that
polymeric film facestocks have the necessary physical characteristics
to work well on the various types of commonly used release liners.
These include silicone-coated supercalendered papers, such as those
commercially available from James River Corporation and Nicolet Paper
Company, polymeric film-coated paper liners, as well as "state of the
art" silicone-coated film release liners, including polyester films
such as Mylar TM sold by Dupont.
When coated with a release agent, the filled polypropylene film is
useful as a release liner. The release liner is dimensionally stable in
varying humidity conditions and is useful when a controlled depth
die-cuttable liner is desirable. It would also be useful as a release
liner for labels where it is desirable to have the die-cut through both
the label and the liner, resulting in handleable discrete items. Where
it is preferable to have many labels connected to a single liner sheet,
i.e. for winding onto a roll, the filled polypropylene film release
liner would not be suitable.
All percents, parts and ratios described herein are by weight unless
otherwise specifically stated.
The following tests are used to evaluate labels of the invention.
Controlled-depth Die-Cuttability
A roll of film was corona treated and coated with an ink receptive
top-coating. A silicone release coated, 62.5 micrometers thick, 20
kilograms per 280 square meters basis weight, super-calendered paper
from James River Corporation was then adhesive coated on the silicone
side. The wet adhesive was dried in a tunnel drier and laminated to the
non-topcoated side of the filled polypropylene film.
The resulting pressure-sensitive label stock was slit to a four inch
width and wound into a finished rolls ready for die-cuttability
evaluations on a Mark Andy Model 830 multipurpose printer/die-cutter.
The controlled depth die-cutting was performed using a rotary die made
by Rotometrics Group, Rotodie Division. The die configuration was a
round-cornered rectangle, 2.85 centimeters(cm) by 5.87 cm, with three
cavities across and three cavities around for a total of 9 cavities. An
RC-300 monitor, sold by RollCut Corporation, was used to measure the
force applied to each die bearer. The RC-300 monitor has precision load
cells which sensed the forces used in determining the die-cutting
performance of pressure-sensitive label stocks. A calibrated digital
read-out then converted the load cell output voltage to kilograms of
measured force.
The forces on the die bearers were first set at a total force of 4.5
kilograms.
Using a control set of pressure-sensitive label stocks with either 33
kilogram Kromekote TM paper (on a 280 sq. meters basis), from Champion
Paper or a 87.5 micrometer plasticized vinyl film facestock, the bearer
forces were increased until 100% of the labels remained on the liner
was achieved. Then the test labels were run in the same way and the
die-cutting performance was recorded as total die bearer force, percent
labels remaining on the liner, and condition of the liner. Dye
Penetration Test
This procedure was used to determine the ease of controlled depth
die-cutting and the associated condition of the liner after
die-cutting. A 1% solution of methyl red dye in ethyl alcohol was
placed on a gauze wiper. The die-cut labels were removed from a portion
of the liner. The gauze with the red dye solution was rubbed onto the
silicone side of the release liner where the labels were removed. The
object was to determine if the cutting edges of the die had penetrated
the silicone release layer and/or the paper.
Penetration into a silicone valley could be noted at the die contact
site by a red line which was easily wiped off the surface. Penetration
of the die into the paper would be noted by the wicking of the red
solution into the paper.
Definitions for liner condition (after die-cutting) used in this
document were as follows. A = Good, no obvious liner damage. B =
Satisfactory, very limited liner damage. C = Unsatisfactory, liner
surface crushed or cut. Tensile Elongation at Break
The tensile and elongation data were measured at the film breaking
point according to A.S.T.M. standard test method D 882-83 method A
except for grip separation speed as noted below. This test employed a
constant rate of separation of the grips which held the ends of the
test specimen. The test samples were cut to a size of 2.54 cm width by
10.2 cm length in the designated direction (machine or transverse). The
test equipment was an Instron TM brand model 1122, available from the
Instron Corporation. The initial grip separation was 5.1 cm. The rate
of grip separation was 12.7 cm per minute. The tensile data was
recorded in kiloPascals and was obtained by dividing the maximum load
by the original cross sectional area of the specimen.
The percent elongation data was obtained by dividing the elongation at
the break point by the initial grip separation and multiplying by 100.
Printability Test
The label facestock of the present invention was evaluated for
printability using two different printing techniques, i.e.,
flexographic and letterpress. Two different inks were employed: Gemglo
#8 Red Code B-876854-76L0098 (a flexographic ink with an alcohol
solvent system) and UV vinyl process Red Code B-878368-86LO566 (an UV
curable letterpress ink), both available from Inmont Division of BASF.
The flexographic ink was applied using a spring loaded, adjustable,
flexo hand proofer with a 180 p Evenflo TM Anilox engraved roll
available from Pamarco Inc. The ink sample was allowed to air dry at
22.2 DEG C (72 DEG F) for ten minutes.
The letterpress ink was applied using a "quickpeek" color proofing kit
sold by Thwing-Albert Instrument Company. The ultraviolet radiation
source was a 152 millimeter (six inch) long, 200 watt per 25.4
millimeters (one inch), medium pressure, mercury vapor, ultraviolet
curing lamp with a fused quartz envelope. The ink sample was exposed to
the ultraviolet radiation on a stainless steel wire conveyer belt,
traveling at 10.5 meters (35 feet) per minute, at a distance of 63
millimeters (2 1/2 inches) under the lamp.
Ink anchorage was evaluated by applying Scotch TM brand #898 filament
tape to the inked film using a smaller roller (with handle) and firm
hand pressure. The filament tape adheres immediately to the inked film.
The dwell time of the tape was approximately one minute. One piece of
the filament tape was pulled back at a 180 DEG angle at 305 millimeters
(12 inches per minute). A second piece of the filament tape was pulled
back at a 180 DEG angle at 7,625 millimeters (300 inches) per minute.
Ink anchorage characteristics were reported as a percentage of ink
transferring to the filament tape. The data was expressed as the
average of the percent ink offset at the slow and the fast filament
tape pull speeds.
The ink anchorage test conducted with the flexographic ink was repeated
three times as follows: ten minutes, one hour, and 24 hours after ink
application.
The ink anchorage test conducted with the letterpress ink was repeated
three times as follows: one minute, one hour and 24 hours after
exposure to the ultraviolet radiation source.
Interpretations for ink anchorage are shown as follows: First ink dwell
period - ten minutes for flexographic, and one minute for letterpress
methods.
12 percent ink offset: generally unsatisfactory. Second ink dwell
period - one hour
3 percent ink offset: generally unsatisfactory Third ink dwell period -

24 hours Any offset: generally unsatisfactory EXAMPLE 1
A controlled depth die-cuttable highly filled polypropylene film was
made by compounding 45 parts of polypropylene pellets having a melt
index of 9 (commercially available as Dypro 8771 from Fina Oil and
Chemical Company), 45 parts of calcium carbonate (available
commercially as OMYA FT from OMYA Inc.), with a particle size
distribution between 0.4 microns and 8 microns and 10 parts of titanium
dioxide, commercially available as Pure R-101 from DuPont, in a 40
millimeter diameter model ZE40 x 33D Berstorff co-rotating twin screw
extruder (commercially available from Berstorff Corporation), fitted
with an extruder screw containing a vent section and several mixing
heads.
The extruder barrel was operated at about 185 DEG C, and the output
from this extruder was fed to a conventional stranding die, also made
by the Berstorff Corporation, operating at a temperature between 204
DEG C and 232 DEG C. The compounded plastic strands were then cooled in
a water bath, dried and cut into short highly filled polypropylene
pellets.
These highly filled pellets were then fed to the throat of a 62.5 mm
diameter single screw Egan extruder (commercially available from Egan
Machinery Company), operating at a temperature of from about 204 DEG C
to about 288 DEG C, and to a flat die with a die lip opening of 0.025
cm, operating within the same temperature range, at an output rate of
55 kilograms per hour. The thick hot film was then pulled into a set of
surfacing and quenching rolls with the speed of the first nip adjusted
to draw the film down to a nominal thickness of 88 micrometers. The nip
was comprised of a polymeric covered steel roll at about 10 DEG C and a
chrome plated steel roll at 38 DEG C. The film was then corona treated

on both sides. EXAMPLE 2
A controlled depth die-cuttable pressure-sensitive adhesive label stock
was made from the highly filled polypropylene film of example 1, a
silicone coated release liner, an acrylic adhesive and an acrylic based
ink receptive coating. The release liner was first coated on its
silicone release side with a solvent-based acrylic adhesive containing
95% isooctyl acrylate and 5% acrylic acid, to a dried coating thickness
of 15 micrometers using a reverse roll coater followed by solvent
drying in a counter-current airflow oven.
One side of the polypropylene film of example 1 was then laminated to
the adhesive side of this adhesive coated release liner by a lamination
process known sometimes as transfer coating.
The other side of the polypropylene film was then coated with an
acrylic based ink receptive top coating comprised of 4% Elvacite TM
2043 and 96% toluene.
This pressure-sensitive label stock was die-cut using a commercially
available rotary die made by Rotometrics Group-Rotodie Division on a
Mark Andy TM Model 830 printing press, to round cornered, rectangular
labels with dimensions of 2.86 cm by 5.87 cm. All labels cut cleanly
and easily and remained in place on the silicone coated paper release
liner. The die bearer force loading was about 41 kilograms per bearer
which easily eliminated all evidence of die bounce. No dye penetration
on the liner was found with the penetration test, showing good
controlled depth die-cuttability. The test results are shown in Table
1. A printability test was also conducted, and the results are shown in

Table 2. EXAMPLE 3
A controlled depth die-cuttable filled polypropylene film was made
similar to Example 1, except the Berstorff ZE-40 x 33 D twin screw
extruder was equipped with a flat film extrusion die instead of the
stranding die to produce thick hot melt that was then pulled into a set
of surfacing and quenching rolls with the speed of the first nip rolls
adjusted to draw the film to a nominal thickness of 88 micrometers.
The nip rolls comprised of a polymer covered steel roll operated at 10
DEG C and a chrome plated steel roll operated at 38 DEG C. Additional
quench rolls were set at 49 DEG C. The film was corona treated on both

sides and wound into a roll prior to adhesive coating. EXAMPLES 4-9 AND
10C - 17C
The label facestocks used in these examples were made in the same way
as in Example 1, except that different amounts of polypropylene,
calcium carbonate and titanium dioxide were used. These variations are
listed in Table 1. These facestocks were coated according to Example 2
using the same adhesive and release coating. They were then tested for
die-cuttability, dye penetration, tensile and elongation and the

results are also shown in Table 1. EXAMPLES 18-19
The film of Examples 1 and 9 were corona treated using corona treating
power range of about 2 x 10<-><4> joules per square meter (4 watts per
square foot per minute) Gemglo flexographic ink and UV vinyl process
ink were then printed on the films using their respective printing

techniques and the results are shown in Table 2. EXAMPLES 20-28
These were made similar to Example 1 except different amounts of Ti02,
and CaC03 and polypropylene were used. These variations are listed in
Table 3. These facestocks were coated according to Example 2 using the
same adhesive and release coating. They were then tested as in previous

examples and the results are shown in Table 3. EXAMPLES 29-30 and 29C
These were made similar to Example 1 and Example 2 except constant
amounts of CaC03, without titanium dioxide, and blends of polypropylene
homopolymer and polypropylene/polyethylene copolymer were used. These
are shown in Table 4 along with die-cuttability test results and
condition of liner after die-cutting. A control using 100%
polypropylene homopolymer was also made and tested and results are also

shown. EXAMPLES 31-33 and 31C
These were made similar to Example 1 and Example 2 except with constant
amounts of CaC03, without titanium dioxide, and blends of polypropylene
homopolymer and polyethylene/vinyl acetate copolymers were used. These

are shown in Table 5 along with test results. EXAMPLE 34
This was made similar to Example 1 and 2 except with a blend of
polypropylene homopolymer and polyethylene homopolymer. This is shown

in Table 6 along with test results. EXAMPLES 35-39 and 35C
Examples 35-39 were made similar to Examples 1 and 2 except
polypropylene homopolymer and copolymer of different melt indices were
blended with polypropylene of melt index 9 to obtain a blend of varying
melt indices. These are shown in Table 7 along with the control 35C.

EXAMPLES 40-47
These were made similar to Example 1 and the compositions and the

die-cutting results were recorded in Table 8. EXAMPLES 48-52
These were made similar to Examples 1 and 2 except polypropylene
homopolymer of melt index 9 was blended at varying amounts with
polypropylene homopolymer of melt index 2.0. The test results along

with composition variations are shown in Table 9. EXAMPLES 53C-59C, and
60-64
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and talc. These are shown in Table 10 and Table 10A along with
test data. The samples were then corona treated as described in
Examples 18 and 19. Ink printability tests were performed for the
labels of these examples, and the results are shown in Table 10 and

Table 10A. EXAMPLES 65C-68C and 69-71
These were made similar to Example 1 and 2 except with varying amounts
of CaC03 and clay. These are shown in Table 11 along with test data.

EXAMPLES 71C-76C and 77-79
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and Mica. These are shown in Table 12 and Table 12A along with

test data. EXAMPLES 79C-92C and 93-95
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and soft silica. These are shown in Table 13 and Table 13A

along with test data. EXAMPLES 96C-100C and 101
These were made similar to Examples 1 and 2 with varying amounts of
CaC03 and Barium Sulfate. These are shown in Table 14 and Table 14A

along with test data. EXAMPLES 102C-107C
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and Aluminum Silicate. These are shown in Table 15 along with

test data. EXAMPLES 108C-114C
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and Degussa Silica. These are shown in Table 16 along with

test data. EXAMPLES 115C-119C and 120
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and Alumina. These are shown in Table 17 along with test data.

EXAMPLES 121C-125C and 126
These were made similar to Examples 1 and 2 except with varying amounts
of CaC03 and Zinc oxide. These are shown in Table 18 along with test

data. EXAMPLES 127-133
These were made similar to Examples 1 and 2 except with varying
facestock thicknesses. These along with test results are shown in Table

19. EXAMPLE 134
This was made similar to Example 1. The film stock was then coated with
Dow Corning System V solvent based silicone release coating and oven
dried. This was then laminated to a polypropylene masking tape
commercially available from Minnesota Mining and Manufacturing Company)
and flat bed die-cut from the release liner side to obtain a score line
cut.
The release liner was easily removable, and exhibited even release
characteristics.
Columns=9 TITLE: Tensile elongation and die-cuttability properties of filled polypropylene film facestocks versus film composition. Head Col
1: Examples Head Col 2: %CaCo3 Head Col 3: %PP Head Col 4: %Ti02 Head
Col 5: Bearer Force (Kg) Head Col 6: %Labels on liner Head Col 7: Liner
cond. Head Col 8: Kilo Pascal Tensile at break Head Col 9:
Elong. % 245451082100A15,400670 45636864100A13,400670
55141877100A14,400680 64843882100A16,000680 74646886100A16,350680
84349886100A/B17,250690 941518113100B17,850700
10C3656822797B/C19,300700 11C3161822795B/C21,050700
12C2666822785B/C22,400700 13C2171822784C23,750700
14C1676822774C25,600730
15C1182822772C27,050750 16C686822755C28,550850 17C092822747C31,0051100
As can be seen from above, labels with filled polypropylene facestocks
of the invention showed satisfactory to very good liner conditions
after die-cutting, with 100% of the labels on the liner. The bearer
force required to die-cut the labels ranged from 77 Kgs - 113 Kgs.
Comparative labels showed unsatisfactory levels of liner damage, (less
than 100% of the labels on the liner), and required much higher bearer
forces ( SIMILAR 227+ Kg).
Columns=6 Head Col 1 AL=L: Example Head Col 2: Ink Head Col 3 to 6: %
Ink Offset SubHead Col 1: SubHead Col 2: SubHead Col 3: 10 min SubHead
Col 4: (1 min) SubHead Col 5: 1 hr SubHead Col 6: 1 day 2Gemglo Red
Ink500 2UVLP Vinyl Process Red Ink000 18Gemglo Red Ink3-00 18UVLP Vinyl
Process Red Ink-300 19Gemglo Red Ink10-30 19UVLP Vinyl Process Red
Ink-300 Columns=10 Head Col 1:
Examples Head Col 2: 20 Head Col 3: 21 Head Col 4: 22 Head Col 5: 23
Head Col 6: 24 Head Col 7: 25 Head Col 8: 26 Head Col 9: 27 Head Col
10: 28 % Ti020246812141618 % Polypropylene504948474644434241 %
CaC03504948474644434241 Bearer Force (Kg)907782778682827777 % Labels on
Liner100100100100100100100100100 Tensile Kilo
Pascals14,80016,75018,45017,10016,50013,80014,400 14,15013,800 % Elong.
at break600650735725700630605595585
Again, as can be seen from the above labels with filled polypropylene
facestocks of the invention showed satisfactory to very good linear
conditions after die-cutting, with 100% of the labels on the liner.
Columns=4 TITLE: Die-cuttability properties of polypropylene film made with a 9.0 melt index polypropylene homopolymer blended with
polyethylene/polypropylene copolymers. Head Col 1:
Examples Head Col 2: 29 Head Col 3: 29C ** Head Col 4: 30 Copolymer
TypeDYPRO 9670 PP/PE MI-4NoneDYPRO W756 PP/PE MI-7 Copolymer PP/PE25025
Homopolymer PP * MI = 9255025 % CaC03505050 % Ti02000 Bearer Force
(Kg)776864 % Labels on Liner100100100 Liner ConditionAAA * ASTM-D-1238
Condition L ** Control -- 100% polypropylene homopolymer
Columns=5 TITLE: Die-cuttability properties of polypropylene film made with a 9.0 melt index polypropylene homopolymer blended with
polyethylene/vinylacetate copolymers Head Col 1:
Examples Head Col 2: 31 Head Col 3: 31C ** Head Col 4: 32 Head Col 5:
33 Copolymer TypeNORCHEM PE-3043 4.5% V.A.NoneNORCHEM PE-3010 9.0% V.A.
ELVAX 40W 40% V.A. Copolymer PE/VA1201212 PP Homopolymer * MI =
938503838 % CaC0350505050 % Ti020000 Bearer Force (Kg)77686464 % Labels
on Liner100100100100 Liner ConditionAAAA * ASTM-D-1238 Condition L **
Control - 100% polypropylene homopolymer, an alternate lablestock of
the invention
Again, as can be seen from the above labels with filled polypropylene
facestocks of the invention showed very good liner conditions after
die-cutting, with 100% of the labels on the liner.
Columns=2 TITLE: Die-cuttability properties of polypropylene film made with a 9.0 melt index polypropylene homopolymer blended with a
polyethylene homopolymer. Head Col 1: Example Head Col 2: 34 Polymer
TypeCHEMPLEX 3404 HOMOPOLYMER PE PG Homopolymer12 PP Homopolymer * MI =
938 % CaC0350 % Ti020 Bearer Force (Kg)73 % Labels on Liner100 Liner
ConditionA * ASTM-D-1238 Condition L Columns=7 TITLE: Melt Index of Extruded Film Formulated With Polypropylene of Various and Blended Melt
Indices Head Col 1: Head Col 2 to 7: Composition of Film SubHead Col 1:
Examples SubHead Col 2: 35 SubHead Col 3: 35C SubHead Col 4: 36 SubHead
Col 5: 37 SubHead Col 6: 38 SubHead Col 7: 39 Various Polymer Type
DYPRO TM -3275 * MI = 2.0 POLYPROPYLENE HOMOPOLYMER NONE DYPRO TM -8485
* MI = 1.2 POLYPROPYLENE HOMOPOLYMER DYPRO TM -9670 * MI = 4.0 HIGH PE
RANDOM COPOLYMER PP/PE DYPRO TM W-756 * MI = 7.0 HIGH PE RANDOM
COPOLYMER PP/PE DYPRO TM - 7771 * MI = 8.0 MEDIUM PE RANDOM COPOLYMER
PP/PE %40015151515 % DYPRO TM -8771 * Melt Index of 9.0040 25252525 %
CaC03606060606060 Combined * Melt Index1.56.73.36.67.0 7.7 *
ASTM-D-1238 Condition L
EMI31.1 Columns=6 TITLE: Die-cuttability properties of polypropylene film made with homopolymer
polypropylene polymers melt index, 2.0 and 9.0 and blends of same. Head
Col 1: Examples Head Col 2: 48 Head Col 3: 49 Head Col 4: 50 Head Col
5: 51 Head Col 6: 52 Polymer TypeDypro TM 3275 MI = 2.0Dypro TM 3275 MI
= 2.0 Dypro TM 3275 MI = 2.0Dypro TM 3275 MI = 2.0Dypro TM 3275 MI =
2.0 %010203040 % Homopolymer PP MI=9.05040302010 % CaCo35050505050 %
Ti0200000 Bearer Force (Kg)738286227227 % Labels on Liner1001001009070
Liner ConditionAA/BBB/CB * ASTM-D-1238 Condition L
Columns=7 TITLE: The effect of polypropylene content, filler content and filler types on
the die-cuttability properties of polypropylene films for pressure
sensitive film label stocks Head Col 1: Examples Head Col 2: 53C Head
Col 3: 54C Head Col 4: 55C Head Col 5: 56C Head Col 6: 60 Head Col 7:
61 % Fillers Type * 1020154022.557 % CaC031522.5 % PP908070605043 %
Ti02 Bearer Force (Kg)2272272272279164 % Labels on liner0258395100100
Liner Cond.CBAAAA Ink Offset (%) Gemglo (UV) Red p10 min (1 min)5 (5)10
(13)15 (13)(3)10 (10) 1 hr3 (3)3 (3)3 (5)(3)0 (3) 1 day0 (0)0 (3)0
(0)(0)0 (0) *Talc, California .
Pfizer CP 1040
Columns=7 Head Col 1: Examples Head Col 2: 57C Head Col 3: 58C Head Col
4: 59C Head Col 5: 62 Head Col 6: 63 Head Col 7: 64 % Fillers Type *
1020154022.545 % CaC031522.5 % PP908067605055 % Ti0235 Bearer Force
(Kg)2272272271007364 % Labels on liner226785100100100 Liner Cond.BBACAA
Gemglo (UV) Red 10 min (1 min)5 (10)8 (5)90 (10)50 (10)8 (5)90 (10) 1
hr0 (3)0 (0)40 (10)15 (5)0 (0)5 (3) 1 day0 (0)0 (0)8 (3)0 (0)0 (0)0 (0)
*Talc, Montana .
Pfizer MP 1052
Columns=7 TITLE: The effect of polypropylene content, filler content and filler types on the die-cuttability properties of polypropylene
films for pressure sensitive film label stocks. Head Col 1: Examples
Head Col 2: 65C Head Col 3: 66C Head Col 4: 67C Head Col 5: 68C Head
Col 6: 69 Head Col 7:
70 % Fillers Type * 1020154022.557 % CaC031522.5 % PP908067605043 %
Ti0235 Bearer Force (Kg)2272272271737368 % Labels on
liner175383100100100 Liner Cond.CA/BCCBA Ink Offset (%) Gemglo (UV) Red
10 min (1 min)8 (10)13 (10)10 (15)80 (10)8 (3)45 (0) 1 hr3 (5)3 (5)0
(3)5 (0)0 (3)3 (0) 1 day0 (0)0 (0)0 (0)0 (0)0 (0)3 (0) * clay, calcined
.
Huber Polyfill WC
Columns=5 TITLE: The effect of polypropylene content, filler content and filler types on the die-cuttability properties of polypropylene
films for pressure sensitive film label stocks. Head Col 1: Examples
Head Col 2: 71C Head Col 3: 72C Head Col 4: 73C Head Col 5:
76 % Fillers Type * 10201526 % CaC0315 % PP90806774 % Ti023 Bearer
Force (Kg)22722722773 % Labels on liner226395100 Liner Cond.AAAB Ink
Offset (%) Gemglo (UV) Red 10 min (1 min)30 (13)75 (45)80 (13)90 (43) 1
hr5 (18)10 (20)43 (8)30 (18) 1 day0 (3)5 (15)18 (3)23 (0) * Mica Huber
Aspraflex 100
Columns=5 Head Col 1:
Examples Head Col 2: 72C Head Col 3: 73C Head Col 4: 74C Head Col 5: 76
% Fillers Type ** 10201532 % CaC0315 % PP90806768 % Ti023 Bearer Force
(Kg)22722722764 % Labels on liner112068100 Liner Cond.AAAA Ink Offset
(%) Gemglo (UV) Red 10 min (1 min)20 (18)10 (5)13 (13)55 (20) 1 hr0
(10)3 (3)0 (0)10 (10) 1 day0 (0)0 (0)0 (0)0 (8) ** Mica Huber
Asprapearl 100
Columns=7 TITLE: The effect of polypropylene content, filler content and filler types on the die-cuttability properties of polypropylene
films for pressure sensitive film label stocks. Head Col 1:
Examples Head Col 2: 79C Head Col 3: 80C Head Col 4: 81C Head Col 5:
82C Head Col 6: 83C Head Col 7: 93 % Fillers Type * 1020154022.555 %
CaC031522.5 % PP908067605045 % Ti0235 Bearer Force
(Kg)22722722722710968 % Labels on liner58755898100 Liner Cond.AAAAAA
Ink Offset (%) Gemglo (UV) Red 10 min (1 min)3 (3) 1 hr0 (0) 1 day0 (0)
* Soft Silica Tammsco Neosil A
Columns=7 Head Col 1:
Examples Head Col 2: 84C Head Col 3: 85C Head Col 4: 86C Head Col 5:
87C Head Col 6: 88C Head Col 7: 94 % Fillers Type **1020154022.557 %
CaC031522.5 % PP908067605043 % Ti0235 Bearer Force
(Kg)22722722722722759 % Labels on liner322509595100 Liner
Cond.B/CB/CBBAA Ink Offset (%) Gemglo (UV) Red 10 min (1 min)10 (5)90
(0) 1 hr0 (3)10 (0) 1 day0 (0)0 (0) * Soft Silica Tammsco S Micron
Columns=6 Head Col 1:
Examples Head Col 2: 89C Head Col 3: 90C Head Col 4: 91C Head Col 5:
92C Head Col 6: 95 % Fillers Type *1020154061 % CaC0315 % PP9080676039
% Ti023 Bearer Force (Kg)22722722722759 % Labels on liner2406795100
Liner Cond.CCCB/CB Ink Offset (%) Gemglo (UV) Red 10 min (1 min)3 (8)3
(13) 1 hr0 (0)3 (3) 1 day0 (0)0 (0)
Columns=7 Head Col 1:
Examples Head Col 2: 96C Head Col 3: 97C Head Col 4: 98C Head Col 5:
99C Head Col 6: 100 Head Col 7: 101 % Fillers Type * 1020154022.565 %
CaC031522.5 % PP908067605035 % Ti0235 Bearer Force (Kg)2272272272271A %
Labels on liner11115061100 Liner Cond.AAAAB Ink Offset (%) Gemglo (UV)
Red 10 min (1 min)50 (8)8 (3) 1 hr3 (3)3 (3) 1 day0 (3)0 (0) * Barium
Sulphate Bartex 65
Columns=7 Head Col 1:
Examples Head Col 2: 102C Head Col 3: 103C Head Col 4: 104C Head Col 5:
105C Head Col 6: 106C Head Col 7: 107C % Fillers Type * 1020154022.554
% CaC031522.5 % PP908067605046 % Ti0235 Bearer Force
(Kg)227227227227227227 % Labels on liner0030398780 Liner Cond.AA/BAAAB
Ink Offset (%) Gemglo (UV) Red 10 min (1 min)13 (3)30 (5) 1 hr0 (0)3
(0) 1 day0 (0)0 (0) * Aluminum Silicate Degussa P820
Columns=8 Head Col 1:
Examples Head Col 2: 108C Head Col 3: 109C Head Col 4: 110C Head Col 5:
111C Head Col 6: 112C Head Col 7: 113C Head Col 8: 114C % Fillers Type
* 001.51.51.5210 % CaC03363630364236 % PP56646962.556.55490 % Ti0288
Bearer Force (Kg)227227227227227227227 % Labels on liner75706075808522
Liner Cond.ABCBBBA Ink Offset (%) Gemglo (UV) Red 10 min (1 min)3 (3)3
(5) 1 hr0 (0)0 (0) 1 day0 (0)0 (0) * Silica Degussa FK 500LS
Columns=7 TITLE: The effect of polypropylene content, filler content and filler types on
the die-cuttability of polypropylene films for pressure sensitive film
label stocks. Head Col 1: Examples Head Col 2: 115C Head Col 3: 116C
Head Col 4: 117C Head Col 5: 118C Head Col 6: 119C Head Col 7:
120 % Fillers Type * 102015406222.5 % CaC031522.5 % PP908067603850 %
Ti0235 Bearer Force (Kg)227227227227155100 % Labels on
liner53649210080100 Liner Cond.ABBBBA Ink Offset (%) Gemglo (UV) Red 10
min (1 min)3 (3)5 (5) 1 hr0 (0)0 (0) 1 day0 (0)0 (0) * Alumina Arco
Ceralox MPA-4
Columns=7 TITLE: The effect of polypropylene content, filler content and filler types on the die-cuttability of polypropylene films for
pressure sensitive films label stocks. Head Col 1:
Examples Head Col 2: 121C Head Col 3: 122C Head Col 4: 123C Head Col 5:
124C Head Col 6: 125C Head Col 7: 126 % Fillers Type * 102015405722.5 %
CaC031522.5 % PP908067604350 % Ti0235 Bearer Force
(Kg)22722722722722773 % Labels on liner2530856590100 Liner Cond.ABBAAA
Ink Offset (%) Gemplo (UV) Red 10 min (1 min)13 (0)5 (3) 1 hr3 (5)0 (0)
1 day3 (0)9 (0) * Zinc Oxide New Jersey Zinc xx-78
Columns=8 Film thickness effects on die-cuttability Head Col 1:
Examples Head Col 2: 127 Head Col 3: 128 Head Col 4: 129 Head Col 5:
130 Head Col 6: 131 Head Col 7: 132 Head Col 8: 133 Film Thickness
(mils)8.06.04.03.53.02.52.0 or less Bearer Force (Kg)68646464737382 %
Labels on liner * 100100100100100100 ** 100 Liner Cond.AAAAAAA *
Requires tighter liner release than typical. ** Requires smoother
liners than typical.