CA2125885A1 - Plastic release film with textured or non-planar surface - Google Patents

Plastic release film with textured or non-planar surface

Info

Publication number
CA2125885A1
CA2125885A1 CA002125885A CA2125885A CA2125885A1 CA 2125885 A1 CA2125885 A1 CA 2125885A1 CA 002125885 A CA002125885 A CA 002125885A CA 2125885 A CA2125885 A CA 2125885A CA 2125885 A1 CA2125885 A1 CA 2125885A1
Authority
CA
Canada
Prior art keywords
release
release film
ethylene
block copolymer
silicone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002125885A
Other languages
French (fr)
Inventor
Hachul Christopher Kim
Andrew Philip Lebel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Oil Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/811,125 external-priority patent/US5232784A/en
Application filed by Individual filed Critical Individual
Publication of CA2125885A1 publication Critical patent/CA2125885A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B13/12Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/06Interconnection of layers permitting easy separation
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/0427Coating with only one layer of a composition containing a polymer binder
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/40Adhesives in the form of films or foils characterised by release liners
    • C09J7/401Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/40Adhesives in the form of films or foils characterised by release liners
    • C09J7/403Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/20Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21Anti-static
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2519/00Labels, badges
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2453/00Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00Presence of polyolefin
    • C09J2423/006Presence of polyolefin in the substrate
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00Presence of (meth)acrylic polymer
    • C09J2433/005Presence of (meth)acrylic polymer in the release coating
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2453/00Presence of block copolymer
    • C09J2453/006Presence of block copolymer in the substrate
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2483/00Presence of polysiloxane
    • C09J2483/005Presence of polysiloxane in the release coating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

A release film comprising an oriented polymeric substrate layer having a surface layer of an ethylene-propylene block copolymer on one side thereof and a release coating on the other side thereof. Where the release material comprises a silicone-acrylate release material it may include a quaternary ammonium salt therein.

Description

212588~

PLASTIC RELEASE FILM~WITH TEXTURED
OR NON-PL~NAR SURFACE

The present invention relates to a release film, a major utility of which is to protect and carry label stock un~il the label is put into use on an appropriate surface.

For many years labels have been prepared with an adhesive applied to one side thereof. In instances where the adhesive is a pressure sensitive adhesive, some means had to ~e provided to protect the adhesive surface in advance of applying the label to the ultimate surface to be labeled. .A technique has evolved over the years by which the pressure sensitîve adhesive is protected by bringing the adhesive surface into contact with a release layer which has little tendency to aggressively adhere to the pressure sensitive adhesive surface. Thus, a second film having a release surface is brought into con act with the pressure sensitive surface carried by the label protecting the pressure sensitive adhesive until the label is applied to its ultimate surface. It is to be - understood that the pressure sensitive adhesive can be applied to the release surface and the label stock thereafter applied to the adhesive surface. On removal of the label the pressure sensitive adhesive will preferentially adhere to the label stock.

Release films can be manufactured separately from the -~
label face stock. The release film is manufactured b~.
applying a commercially available release material ~G
one side of the release film and the combination is then convolutely wound into a roll stock. Ultimately this roll stock must be unrolled and slit to a width dimension suited to a particular label dimension. Next a pressure sensitive layer is applied over the release 212~88~ ~ 2 ~

layer and this is mated with the underside of a sheet of label stock. Alternatively the label stock can have the pressure sensitive adhesive applied to it's undersurface which in turn is mated with the release S label. Following this, label indicia is printed onto the surface of label and, thereafter, the label is die cut so that it can be separated from the release sheet-label stock combination.

During the unwinding of release film roll stock for re-dimensioning purposes, serious problems can arise.
After the release material is applied as a coating layer on the substrate and subjected to electron beam curing and during the convoluted winding of the stock, a portion of or a fraction of the release material is transferred to the back side of the release film.
Later when this release roll is unwound to receive label stock thereon, and subsequently rewound, some release material or a fraction thereof transfers to the surface of the label stock prior to the label stock receiving printed indicia. This transferred release -~
material causes imperfections to occur during the label printing process. The transferred release material interferes with printing. This leads to the need to discard the combination of material at a point when the product is almost completely ready for use or marketing.

Furthermore, as a result of rapid unwinding, a high electrostatic potential develops at the point of unroll. This electrostatic potential can achieve dangerous levels which can lead to fire, explosion, or physical injury. Another problem is that the film will not always track in an even, unvarying manner as it moves employed in the manufacture of the product.

This invention seeks to overcome the aforementioned 3 L , difficulties.

In one aspect, the present invention provides a rel~ase film compri~ing an oriented thermoplastic polymeric s~bstrate layer having a surface layer comprising an ethylene-propylene block copolymer on one side thereof and a release coating on the other side thereof. While it is not completely understood, it is believed that the ethylene-propylene block copolymer surface has a distinctive texture which causes, during unwind of a roll of said film, a reduced electrostatic potential, ~-in comparison to a smooth surface and said surface texture permits even, unvarying transport over rollers during manufacture and use.

In another aspect, the invention provides a release film comprising an oriented thermoplastic polymeric ~-layer having one side thereof a release coating comprising a silicone-acrylate release material, the coating including therein a quaternary ammonium salt.

The substrates contemplated herein can be any polymeric film substrate which can effectively carry a release coating on one side thereof and an ethylene-propylene block copolymer surface on the other side thereof.
Preferred substrates include, polyolefin films which are oriented and preferably biaxially oriented. The substrate can be a homopolymer, copolymer or a bl nd thereof. A preferred homopolymer is polypropylene.
Particularly preferred are isotatic polypropylenes containing at least 80% by weight of isotatic polypropylene. This substrate layer can be homopolypropylene having a melting point range from 32lD to 336~F. Commercially available materials of this description include Exxon 4612 and FINA 3371. It is to be understood that the substrate can be a single material or a combination of coextruded substrate WO93/11933 PCT/US92/lO9Sg 21~5~8~ 4 materials. For example, polypropylenes of different melt indexes can be employed to yield excellent handling characteristics. The substrate can be provided in any thickness which facilitates either S human or machine handling~ A preferred thickness range can be from 0.5 mils to 3 mils. The substrate material can be composed of one or a plurality of layers and may be transparent or opaque.

The ethylene-propylene block copolymer can have an ethylene content of less than 20% by weight; for example, from 2 to 20 and preferably from 3 to 15~, and a melt flow index from 1 to 100 g~10 minutes, -~
preferably from 3 to 50 g/10 minutes. A preferred --ethylene-propylene block copolymer is commercially available as Himont 8523, having a melt flow index of about 6.0 q/10 minutes. The release film substrate can be formed for example by coextruding the polypropylene film of choice with the above identified ethylene-propylene block copolymer followed by biaxially orienting the combination 4.3 times in the machine direction and 8 times in the transverse direction.

The block copolymer coated substrate is now in condition to receive a commercial release coating on the side opposite to the ethylene-propylene block copolymer. The select~d release coating can be applied by any convenient technique, for example, by differential offset gravure coating. Thereafter, if the proprietary release coating needs to be cured it can be done so by any prior art technique. A
convenient class of release coatings is described in U.S. Patent No. 4,678,846 and 4,306,050. In essence, these release coatings are silicone polymers having acrylic functional end groups. The material is applied to the opposite side of the block copolymer coated WO93/lls33 PCT/US92/10959 212588~

polypropylene film by differential offset gravure coating and the coating is cured by exposure to energized electrons at the rate of 2.5 Mrads in a RPC
electron beam processor. It is to be understood than curing can be accomplished within the range from 1 to 5, preferably from 2 to 3 Mrads.

The release material of the present invention includes (meth)acrylate ester modified organopolysiloxane mixtures, comprising essentially equilibrated organopolysiloxanes with, on the average, more than 25 to fewer than 200 silicone atoms and which additionally contain 2 to 30 weight percent o~ organopolysiloxanes with, on the average, 2 to 25 silicone atoms and 2 to 30 weight percent of organopolysiloxanes with, on the average, 200 to 2,000 silicone atoms.

As used herein, the organopolysiloxane fractions having -~-more than 25 to less than 200 silicone atoms are sometimes referred to as the first fraction, those having 2 to 25 silicone atoms are referred to as the second fraction, and those having 200 to 2,000 silicone atoms are referred to as the third fraction.

Especially preferr~d are those (meth) acrylate ester modified organopolysiloxane mixtures which contain, besides the e~sentially equilibrated organopolysiloxane with, on the average, more than 25 to fewer than 200 silicone atoms, 5 to 20 weight percent of organopolysiloxanes with, on the average, 5 to 25 siltcone atoms and 5 to 20 weight percent of organopolysiloxanes with, on the average, 200 to ~ 70 silicone atoms.

The organopolysiloxanes contained in the organpolysiloxane mixtures preferably correspond to the - 6 - ~ ~
8 3 ~
formula:

Ra- Si - Qb I

4-(a+b) .
in which R is an alkyl radical with 1 to 4 carbon atoms, preferably, the methyl radical. R may, however, -also be a vinyl or phenyl radical. Moreover, the R
radical may also represent different moieties in the molecule, so that some R radicals represent methyl radicals and the other R radicals may, for example, represent a vinyl or a phenyl radical. Preferably, at least 90% of the R radicals are alkyl radicals, especially methyl radicals.

Q is an organic radical which contains the acrylate or methacrylate ester groups. Preferably, the acrylate or methacrylate ester radical is linked to the silicone atom through an sioc bridge. The acrylate or methacrylate radical may moreover be derived from pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol pentaacrylate, dipentaerythritol pentamethacrylate, ditrimethylolpropane triacrylate, ditrimethylolpropane trimethacrylate, ditrimethylolethane triacrylate, ditrimethylolethane trimethacrylate, trimethylolpropane di(meth)acrylate, trimethylolethane di~meth)acrylate, glycerin di(meth)acrylate, hydroxyethyl acrylate, hydroxpropyl acrylate and neopentyl glycol monoacrylate.

The acrylate or methacrylate ester radical may, however, also be linked through an SiC bridge with the organopolysiloxane. a has a value of 1.0 to 2.2; b has a value of 0.001 to 1.6. The fractions of different - 7 ~12~885 average molecule weight contained in the inventive acrylate or methacrylate ester modified ;~
organopolysiloxane mixtures may differ in respect to the R and Q radicals and the a and b subscripts.

Organosilicone species in the above referenced silicone acrylate release coatings are believed to migrate from the coating to adjacent contacting surfaces. The cause of this migration may be nonfunctionalized silicone remaining in the release coating. These migratable species are not bound or fixed in the cured coating and thus will migrate to adjacent contacting surfaces. I~ has been found that by including a quaternary ammonium salt in the silicone acrylate material prior to applying it to the release substrate that by s~me reaction the migratable mat~rial -~
is either prevented from migrating or converted to a material which has no adverse effect on label printing. -~
What is known is that the inclusion of the quaternary ammonium salt solves this expensive problem. The silicone acrylate release coating normally is applied to the substrate in a quantity of from about 0~2-l.2 grams/l000 in2, preferably about 0.7 g/l000 in2.

The quaternary ammonium salt can be added to the silicone acrylate release coating material in a -~
proportion of from 0.2-8 wt %. The substrate can be from l.8 to about 2.2 mils thick. Examples of ~
quaternary ammonium salts include the following:
o Dimethylaminoethyl methacrylate dimethyl sulfate ("Madquat Q-5" by Norsolac, Inc.) .
o (3-Lauramidopropyl)trimethyl ammonium methyl sulfate ("~yastat LS" by American Cynamid) 212~85 - 8 -o Stearamidopropyl-dimethyl-2-hydroxyethyl ammonium nitrate ~"Cyastat S~" by American Cynamid) o N,N-bis(2-hydroxyethyl)-N-(3-dodecycloxy-2-hydroxypropyl)methyl ammonium methyl sulfate ~
("Cyastat 609" by American Cynamid) ~`

o Stearamidopropyl-dimethyl-2-hydroxyethyl ammonium dihydrogen-phosphate ("Cyastat SP" by American Cynamid) o Trialkylalkyletherammonium salts (e.g. Emers~at 6660-A from Henkel Corp.) Examples of the release film in accordance with the present invention in comparison with a prior art release film is shown below. The release compositions were coated onto a 2.0 mil biaxially oriented polypropylene and cured by conventional electron beam radiation technique. The release coating was a silicone-acrylate identified as RC450 from Th.
Goldschmidt of Essen, Germany, to which was added 2,4 and 8% by weight of trialkylalkyletherammonium salt.
The release force (grams/inch) was measured using a TESA4154 tape and a TLMI release force tester. The film-was convolutely wound and so held for a period of l week at 125F., so that the magnitude of release material transfer to the back side of the film could be measured. The film was then unrolled and the rating of ink wetting was mea~ured using a #8800 Berol magic marker. Rating l = high silicone migration, causing a severe ink wetting problem; rating lO = no silicone migration, i.e., no ink wetting problem. The results WO93~1933 PCT/US92~10959 :
2125885 - 9 ~

are shown in the table below.

TABLE -;~
Cured Coating Degree of Ink ~-~
Sample No. Formulation Release Force Wettin~ `
.
(a) Release coating 37 g/in Rating 1 ~--(b) (a)+2% additive 32 g/in Rating 8 (c) (a)+4% additive 27 g/in Rating 8 (d) (a)+8% additive 28 g/in Rating 8 The above data shows the outstanding decrease in the ~-~
amount of transferred or migrated release material to ~-the back side of the release film. The data also shows that the quaternary ammonium salt modified silicone-acrylate release material decreased the release force to a moderate extent, thus maintaining its release effectiveness.

The silicone-acrylate coated release liner is then convolutely wound into a roll which is approximately from 60 to 80 inches in width. For test purposes the roll stock of the present invention was unrolled at speeds from 300 to 1500 feet per minute, simulating the unroll speed for purposes of slîtting the roll stock to form lower dimension rolls. During this unrolling no dangerous electrostatic discharge levels were noted. In addition, the film tracked in an even, unvarying manner.

Claims (13)

1. A release film comprising an oriented thermoplastic polymeric substrate layer having a surface layer comprising an ethylene-propylene block copolymer on one side thereof and a release coating on the other side thereof.
2. A release film according to claim 1 wherein the substrate comprises a polyolefin film and the release coating comprises a silicone-acrylate coating.
3. A release film comprising an oriented thermoplastic polymeric substrate layer having on one side thereof a release coating comprising a silicone-acrylate material, the coating including a quaternary ammonium salt therein.
4. A release film according to claim 3 wherein the quaternary ammonium salt is present in the silicone-acrylate material in an amount from 0.2 to 8%
by weight.
5. A release film according to claim 3 or 4 wherein the oriented thermoplastic polymeric substrate has a surface layer comprising an ethylene-propylene block copolymer on the other side thereof.
6. A release film according to any preceding claim wherein the polyolefin substrate comprises a homopolymer, a copolymer or a blend thereof.
7. A release film according to claim 6 wherein the homopolymer is polypropylene.
8. A release film according to any preceding claim wherein the ethylene-propylene block copolymer has an ethylene content of less than 20% by weight and a melt flow index from 1 to 100g/10 minutes.
9. A release film according to claim 8 wherein the block copolymer has an ethylene content from 3 to about 15% by weight.
10. The release film of claim 1 wherein said ethylene-propylene block copolymer surface has a distinct surface texture which causes, during unwind of a roll of said film, a development of reduced electrostatic potential in comparison to a smooth surface and a film which tracks in an unvarying manner.
11. Use in a release film to reduce development of electrostatic potential during unrolling of a surface layer comprising an ethylene propylene block copolymer.
12. Use in a release film to improve tracking of a surface layer comprising an ethylene-propylene block copolymer.
13. Use in a release coating comprising a silicone-acrylate material to prevent transfer of release material to a label surface of a quaternary ammonium salt therein.
CA002125885A 1991-12-17 1992-12-17 Plastic release film with textured or non-planar surface Abandoned CA2125885A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US80848691A 1991-12-17 1991-12-17
US07/808,486 1991-12-17
US07/811,125 1991-12-20
US07/811,125 US5232784A (en) 1991-12-20 1991-12-20 Release film for label stock
PCT/US1992/010959 WO1993011933A1 (en) 1991-12-17 1992-12-17 Plastic release film with textured or non-planar surface

Publications (1)

Publication Number Publication Date
CA2125885A1 true CA2125885A1 (en) 1993-06-24

Family

ID=27123135

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002125885A Abandoned CA2125885A1 (en) 1991-12-17 1992-12-17 Plastic release film with textured or non-planar surface

Country Status (6)

Country Link
EP (1) EP0617662A4 (en)
JP (1) JPH07502222A (en)
KR (1) KR940703749A (en)
AU (1) AU3327093A (en)
CA (1) CA2125885A1 (en)
WO (1) WO1993011933A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015850A1 (en) * 1993-12-09 1995-06-15 Mobil Oil Corporation Release film for label stock
US6982107B1 (en) * 1997-09-15 2006-01-03 3M Innovative Properties Company Release liner for pressure sensitive adhesives
US5914299A (en) * 1997-09-19 1999-06-22 Minnesota Mining And Manufacturing Company Abrasive articles including a polymeric additive
US5990238A (en) * 1997-09-19 1999-11-23 3M Innovative Properties Company Release coating for adhesive articles and method
DE10246862B4 (en) * 2002-10-08 2007-07-19 Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Use of a film composite with at least two layers
EP2085446A1 (en) * 2008-01-22 2009-08-05 tesa SE Liner and application of the same
JP5338519B2 (en) 2008-09-30 2013-11-13 Tdk株式会社 Release film and ceramic parts sheet
US10293587B2 (en) 2013-11-06 2019-05-21 Upm Raflatac Oy Substrate for a label laminate, a label laminate and a method for manufacturing a label laminate
WO2022044052A1 (en) * 2020-08-31 2022-03-03 Pankaj Bhatt Biaxially oriented polyester release liner, adhesive backed article assembly and method of making same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948708C2 (en) * 1979-02-02 1984-06-28 Th. Goldschmidt Ag, 4300 Essen Process for the preparation of organopolysiloxanes modified with pentaerythritol triacrylic or pentaerythritol trimethacrylic acid esters
JPS5725953A (en) * 1980-07-22 1982-02-10 Toray Industries Multilayer laminated polypropylene film
US4728571A (en) * 1985-07-19 1988-03-01 Minnesota Mining And Manufacturing Company Polysiloxane-grafted copolymer release coating sheets and adhesive tapes

Also Published As

Publication number Publication date
KR940703749A (en) 1994-12-12
WO1993011933A1 (en) 1993-06-24
AU3327093A (en) 1993-07-19
EP0617662A4 (en) 1994-11-23
JPH07502222A (en) 1995-03-09
EP0617662A1 (en) 1994-10-05

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