CN112638647B - Release film and adhesive sheet laminate using same - Google Patents
Release film and adhesive sheet laminate using same Download PDFInfo
- Publication number
- CN112638647B CN112638647B CN201980057215.8A CN201980057215A CN112638647B CN 112638647 B CN112638647 B CN 112638647B CN 201980057215 A CN201980057215 A CN 201980057215A CN 112638647 B CN112638647 B CN 112638647B
- Authority
- CN
- China
- Prior art keywords
- layer
- density
- release
- density polyethylene
- release film
- 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.)
- Active
Links
- 239000000853 adhesive Substances 0.000 title claims description 33
- 230000001070 adhesive effect Effects 0.000 title claims description 33
- -1 polypropylene Polymers 0.000 claims abstract description 73
- 239000004743 Polypropylene Substances 0.000 claims abstract description 65
- 229920001155 polypropylene Polymers 0.000 claims abstract description 65
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 52
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 52
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 17
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 292
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 55
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 55
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 34
- 229920000098 polyolefin Polymers 0.000 claims description 21
- 229920000573 polyethylene Polymers 0.000 claims description 17
- 239000004698 Polyethylene Substances 0.000 claims description 15
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 7
- 239000004711 α-olefin Substances 0.000 description 38
- 239000002994 raw material Substances 0.000 description 32
- 239000000203 mixture Substances 0.000 description 27
- 229920000642 polymer Polymers 0.000 description 26
- 229920001577 copolymer Polymers 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 21
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 20
- 239000005977 Ethylene Substances 0.000 description 20
- 238000004049 embossing Methods 0.000 description 20
- 125000004432 carbon atom Chemical group C* 0.000 description 18
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 16
- 229920003355 Novatec® Polymers 0.000 description 15
- RLAWWYSOJDYHDC-BZSNNMDCSA-N lisinopril Chemical compound C([C@H](N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(O)=O)C(O)=O)CC1=CC=CC=C1 RLAWWYSOJDYHDC-BZSNNMDCSA-N 0.000 description 15
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 14
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 239000004708 Very-low-density polyethylene Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 12
- 229920001866 very low density polyethylene Polymers 0.000 description 12
- ZGEGCLOFRBLKSE-UHFFFAOYSA-N 1-Heptene Chemical compound CCCCCC=C ZGEGCLOFRBLKSE-UHFFFAOYSA-N 0.000 description 8
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 8
- JRZJOMJEPLMPRA-UHFFFAOYSA-N 1-nonene Chemical compound CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 8
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 8
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 8
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229920005606 polypropylene copolymer Polymers 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229920005679 linear ultra low density polyethylene Polymers 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229920001384 propylene homopolymer Polymers 0.000 description 4
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 229920006267 polyester film Polymers 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 229920005604 random copolymer Polymers 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 2
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000013464 silicone adhesive Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical class OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 235000014443 Pyrus communis Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical class CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered 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
- B32B7/02—Physical, chemical or physicochemical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered 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
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered 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
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
Abstract
The purpose of the present invention is to provide a release film having good adhesion between a base material (support layer) and a release layer. In order to achieve the above object, the release film of the present invention has the following configuration. Namely, a mold release film comprising at least a supporting layer and a mold release layer, wherein the mold release layer contains a resin having a density of 0.940g/cm 3 The low-density polyethylene (a) wherein the support layer comprises: selected from polypropylene (B) and a density of 0.941g/cm 3 At least one member selected from the group consisting of the high-density polyethylene (C) and having a density of 0.940g/cm 3 The following low-density polyethylene (D).
Description
Technical Field
The present invention relates to a release film. More specifically, the present invention relates to a release film suitable for an adhesive sheet laminate.
Background
A silicone release agent having excellent releasability is generally used as a release film used for an adhesive sheet. However, the organic silicon compound contained in the organic silicon-based release agent may adversely affect electronic devices such as hard disk drive devices, for example, by corrosion and malfunction.
Therefore, in order to prevent silicone contamination, release films have been proposed in which a release layer containing polyethylene is laminated on a substrate such as a polyester film or a polyolefin film via an undercoat layer and an undercoat layer (patent documents 1 and 2).
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2005-350650
Patent document 2: international publication No. 2009/060924
Disclosure of Invention
Problems to be solved by the invention
However, a release film in which a release layer containing polyethylene is provided on a substrate such as a polyester film or a polyolefin film has insufficient adhesion between the substrate and the release layer.
Accordingly, an object of the present invention is to provide a release film having good adhesion between a substrate (support layer) and a release layer.
Means for solving the problems
The above object of the present invention is achieved by the following aspects.
[1]A mold release film comprising at least a supporting layer and a mold release layer, wherein the mold release layer contains a resin having a density of 0.940g/cm 3 The low-density polyethylene (a) wherein the support layer comprises: selected from polypropylene (B) and a density of 0.941g/cm 3 At least one member selected from the group consisting of the high-density polyethylene (C) and having a density of 0.940g/cm 3 The following low-density polyethylene (D).
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, a release film having good adhesion between the support layer and the release layer can be provided.
Detailed Description
The release film of the present invention has at least a support layer and a release layer. The release layer contained a density of 0.940g/cm 3 The following low-density polyethylene (A). By using such a release layer, a relatively good releasability can be obtained.
The support layer contains: selected from polypropylene (B) and a density of 0.941g/cm 3 At least one member selected from the group consisting of the high-density polyethylene (C) and having a density of 0.940g/cm 3 The following low-density polyethylene (D). By laminating such a supporting layer and the release layer, the adhesion between the release layer and the supporting layer is improved. In addition, the supporting layer contains polypropylene(B) And a density of 0.941g/cm 3 At least one member selected from the group consisting of the high-density polyethylene (C) can improve the rigidity (toughness) of the release film, and improve the workability and peeling workability of the release film.
[ Release layer ]
The release layer in the present invention contains a resin having a density of 0.940g/cm 3 The following low-density polyethylene (A). The density of the low-density polyethylene (A) is preferably 0.935g/cm from the viewpoint of improving the peelability from the pressure-sensitive adhesive sheet 3 It is more preferably 0.930g/cm 3 Hereinafter, particularly preferably 0.928g/cm 3 The following. Further, the density is preferably 0.850g/cm 3 Above, more preferably 0.860g/cm 3 Above, particularly preferably 0.870g/cm 3 The above.
In the following description, the density may be 0.940g/cm 3 The low-density polyethylene (a) is hereinafter referred to as "low-density polyethylene (a)".
The low density polyethylene includes branched low density polyethylene and linear low density polyethylene. In general, a low-density polyethylene refers to a branched low-density polyethylene other than a linear low-density polyethylene. Any release layer may be used in the present invention. From the viewpoint of further improving peelability from the pressure-sensitive adhesive sheet, the low-density polyethylene (a) in the release layer preferably contains at least a linear low-density polyethylene, and more preferably contains at least a density of 0.850 to 0.940g/cm 3 The linear low-density polyethylene of (3).
The linear low-density polyethylene is a polyethylene mainly composed of an ethylene monomer and obtained by copolymerizing an α -olefin with the ethylene monomer. Here, the main component is a component contained in an amount of 50 mol% or more of the entire monomer components constituting the linear low-density polyethylene.
The α -olefin is preferably an α -olefin having 3 to 12 carbon atoms, and more preferably an α -olefin having 4 to 10 carbon atoms. Specific examples thereof include 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene and 1-decene. These α -olefins may be used alone or in combination. Among the α -olefins, α -olefins having 4 to 8 carbon atoms are more preferable, and particularly, 1-butene, 1-hexene, and 1-octene can be preferably used from the viewpoint of polymerization productivity.
From the viewpoint of improving the peelability from the adhesive sheet, the content of the low-density polyethylene (a) in the release layer is preferably 50% by mass or more, more preferably 60% by mass or more, and particularly preferably 70% by mass or more, relative to 100% by mass of the total solid content of the release layer. The upper limit is 100 mass%.
In the release layer, a combination of linear low-density polyethylene and branched low-density polyethylene may be used as the low-density polyethylene (a). In this case, the branched low density polyethylene is preferably contained in an amount of 1 to 50 parts by mass, more preferably 3 to 40 parts by mass, and particularly preferably 5 to 30 parts by mass, based on 100 parts by mass of the linear low density polyethylene.
Further, the releasing layer preferably contains a density of 0.900g/cm 3 Above and 0.940g/cm 3 The following linear low-density polyethylene and a density of 0.850g/cm 3 Above and less than 0.900g/cm 3 The linear low-density polyethylene has a density of 0.850 to 0.940g/cm 3 The linear low-density polyethylene of (3). This further improves the peelability from the pressure-sensitive adhesive sheet.
The density was 0.850g/cm 3 Above and less than 0.900g/cm 3 The linear low-density polyethylene of (2) is sometimes referred to as "linear ultra-low-density polyethylene".
Hereinafter, the density may be 0.900g/cm 3 Above 0.940g/cm 3 Hereinafter, the linear low-density polyethylene is referred to as "LLDPE", and the density may be 0.850g/cm 3 Above and less than 0.900g/cm 3 The linear ultra-low density polyethylene of (2) is referred to as "VLDPE".
LLDPE and VLDPE are copolymers of ethylene and α -olefins, and when the content of α -olefin is increased, the density tends to be decreased. The content of the α -olefin in the LLDPE is preferably 0.5 to 15 mol%, more preferably 1 to 10 mol%, and particularly preferably 2 to 7 mol% based on the entire monomer components. The content of the α -olefin in the VLDPE is preferably 4 to 30 mol%, more preferably 7 to 25 mol%, particularly preferably 10 to 20 mol% based on the whole monomer component.
The LLDPE is preferably a copolymer of ethylene and an α -olefin having 3 to 12 carbon atoms, more preferably a copolymer of ethylene and an α -olefin having 4 to 10 carbon atoms, and particularly preferably a copolymer of ethylene and an α -olefin having 4 to 8 carbon atoms. Among the above-mentioned α -olefins having 4 to 8 carbon atoms, 1-butene, 1-hexene and 1-octene are preferable.
The LLDPE preferably has a density of 0.910g/cm 3 Above, more preferably 0.915g/cm 3 Above, particularly preferably 0.917g/cm 3 The above. Further, the density was 0.940g/cm 3 Below, preferably 0.935g/cm 3 Hereinafter, more preferably 0.930g/cm 3 Hereinafter, particularly preferably 0.928g/cm 3 The following.
The VLDPE is preferably a copolymer of ethylene and an alpha-olefin having 3 to 12 carbon atoms, more preferably a copolymer of ethylene and an alpha-olefin having 4 to 10 carbon atoms, and particularly preferably a copolymer of ethylene and an alpha-olefin having 4 to 8 carbon atoms. Among the above-mentioned α -olefins having 4 to 8 carbon atoms, 1-butene, 1-hexene and 1-octene are preferable. By including such VLDPE in the release layer, the increase in the peeling force after heating can be easily suppressed. Particularly, in the case where the VLDPE is a copolymer of ethylene and 1-octene, the effect of suppressing an increase in peeling force after heating becomes large.
The density of the VLDPE is preferably less than 0.895g/cm 3 More preferably less than 0.890g/cm 3 Particularly preferably less than 0.885g/m 3 . Further, the density is preferably 0.855g/cm 3 Above, more preferably 0.860g/cm 3 Above, 0.865g/cm is particularly preferable 3 As described above.
The content ratio of LLDPE and VLDPE is preferably 2 to 30 parts by mass of VLDPE, more preferably 4 to 20 parts by mass, and particularly preferably 6 to 15 parts by mass, based on 100 parts by mass of LLDPE, from the viewpoint of further improving peelability from the adhesive sheet.
The release layer may contain a polyolefin other than the low-density polyethylene (a) (hereinafter, may be referred to as "other polyolefin"). Examples of the other polyolefin include polypropylene, polybutene, poly (4-methyl-1-pentene), propylene- α -olefin copolymers, and copolymers of ethylene and components other than α -olefin.
Examples of the α -olefin in the propylene- α -olefin copolymer include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 3-methyl-1-butene, and 4-methyl-1-pentene.
Examples of the copolymer of ethylene and a component other than α -olefin include ethylene-unsaturated carboxylic acid copolymers such as ethylene-acrylic acid copolymers (EAA) and ethylene-methacrylic acid copolymers (EMAA); an ionomer; ethylene- (meth) acrylate copolymers such as ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer (EEA), and ethylene-methyl methacrylate copolymer (EMMA); ethylene Vinyl Acetate (EVA); ethylene-vinyl alcohol copolymers; and so on.
The other polyolefins mentioned above may be used alone or in combination of 2 or more.
When the release layer contains another polyolefin, the content of the other polyolefin is preferably 1 to 30 parts by mass based on 100 parts by mass of the low-density polyethylene (a).
From the viewpoint of further improving the peelability from the pressure-sensitive adhesive sheet, the surface roughness of the release layer is preferably large. Specifically, the arithmetic average roughness Ra of the surface of the release layer is preferably 0.5 μm or more, more preferably 1.0 μm or more, and particularly preferably 1.5 μm or more. If the arithmetic average roughness Ra of the release layer is excessively large, the uneven shape of the release layer may be transferred to the adhesive sheet, and the adhesion between the adhesive sheet and an adherend such as a hard disk drive may be reduced, and therefore the arithmetic average roughness Ra is preferably 7.0 μm or less.
The surface roughness of the release layer can be controlled by forming fine irregularities on the surface of the release layer.
The uneven shape of the surface of the release layer is not particularly limited, and may be a shape in which the same uneven pattern is regularly or irregularly arranged, a shape in which different uneven patterns are regularly or irregularly arranged, or the like. Examples of the uneven pattern include a lattice pattern, a silk pattern, a pear-peel pattern, and a dot pattern.
When fine irregularities are formed on the surface of the release layer, the maximum height roughness Rz is preferably 5.0 μm or more, more preferably 10.0 μm or more, still more preferably 15.0 μm or more, and particularly preferably 21.0 μm or more. The upper limit of the maximum height roughness Rz is about 50 μm. By setting the maximum height roughness Rz of the surface of the release layer to 5.0 μm or more, preferably 10.0 μm or more, the increase in the peeling force from the adhesive sheet after heating is easily suppressed.
Examples of the method for forming fine irregularities on the surface of the release layer include embossing, sandblasting, chemical treatment, and a method in which a mold roll engraved with irregularities is pressed against a release layer in a molten state in a step of forming the release layer.
In the above-described method for forming a projection and a recess, embossing treatment is preferable. As the embossing treatment, for example, a method of pressing a heated embossing roller against a release layer of a release film is preferable, and the shape of the irregularities formed on the release layer can be controlled by adjusting the heating temperature and the pressing pressure of the embossing roller. The heating temperature of the emboss roller is preferably 80 to 160 ℃, and more preferably 100 to 140 ℃.
[ supporting layer ]
The support layer in the present invention contains: selected from polypropylene (B) and a density of 0.941g/cm 3 At least one member selected from the group consisting of the high-density polyethylene (C) and having a density of 0.940g/cm 3 The following low-density polyethylene (D). In the following description, the density may be 0.941g/cm 3 The high-density polyethylene (C) is referred to as "high-density polyethylene (C)", and the density may be 0.940g/cm 3 The low-density polyethylene (D) is hereinafter referred to as "low-density polyethylene (D)".
Examples of the polypropylene (B) that may be contained in the support layer include a propylene homopolymer, a copolymer of propylene and another α -olefin, or a mixture thereof.
Examples of the other α -olefin in the copolymer of propylene and the other α -olefin include ethylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 3-methyl-1-butene, 4-methyl-1-pentene and the like. As the copolymer of propylene and other α -olefin, any of a random copolymer and a block copolymer can be used. The content of the α -olefin in the copolymer of propylene and another α -olefin is preferably 20% by mass or less, and more preferably 10% by mass or less. If the content of the α -olefin exceeds 20 mass%, the crystallinity may be reduced.
From the viewpoint of enhancing the rigidity (toughness) of the release film, the higher the crystallinity of the polypropylene (B), the more preferable. Specifically, the crystallinity of the polypropylene (B) contained in the support layer is preferably 40% or more, more preferably 50% or more, and particularly preferably 60% or more. The upper limit of the crystallinity is 100%.
The crystallinity of the polypropylene can be adjusted by controlling the cooling temperature and cooling rate after melt extrusion in the film-forming step by melt extrusion of the support layer. For example, the crystallinity of polypropylene is increased by slowing down the cooling rate. In addition, the crystallinity can be improved by using a crystal nucleus agent in combination.
The crystal nucleus agent is not particularly limited, and known compounds can be used. Examples thereof include inorganic substances such as talc, metal salts of carboxylic acids, metal salts of phosphoric acids, sorbitol derivatives, and metal salts of rosin.
The high-density polyethylene (C) which may be contained in the support layer preferably has a density of 0.941 to 0.980g/cm 3 More preferably, the polyethylene (B) has a density of 0.945 to 0.975g/cm 3 The polyethylene (2) is particularly preferably a polyethylene having a density of 0.950 to 0.970g/cm 3 The polyethylene of (1).
The support layers may be polypropylene (B) and high-density polyethylene (C) alone or in combination. The content ratio (B: C) when the polypropylene (B) and the high-density polyethylene (C) are used in combination is not particularly limited, and is preferably, for example, 98: 2-2: 98, more preferably 95:5 to 5:95.
the density of the low-density polyethylene (D) contained in the support layer is preferably 0.935g/cm 3 Hereinafter, more preferably 0.930g/cm 3 Hereinafter, it is particularly preferably 0.928g/cm 3 The following. Further, the density is preferably 0.870g/cm 3 Above, more preferably 0.890g/cm 3 Above, particularly preferably 0.900g/cm 3 The above.
The low-density polyethylene (D) may be a linear low-density polyethylene or a branched low-density polyethylene. In addition, the above 2 kinds can be used in combination.
The low-density polyethylene (D) may be the same as or different from the low-density polyethylene (a) used in the release layer, and is preferably the same from the viewpoint of adhesion and productivity. Here, the linear low density polyethylene and the branched low density polyethylene are different from each other, and the density difference is 0.005g/cm 3 The above cases are different types, and the cases other than the above range are the same types.
From the viewpoint of enhancing the rigidity of the release film, the total content of the polypropylene (B) and the high-density polyethylene (C) in the support layer is preferably 50 mass% or more, more preferably 60 mass% or more, and particularly preferably 70 mass% or more, with respect to 100 mass% of the total solid content of the support layer. On the other hand, if the total content of the polypropylene (B) and the high-density polyethylene (C) is too large, the adhesion to the release layer may be reduced, and therefore, the total content is preferably 97% by mass or less, more preferably 95% by mass or less.
From the viewpoint of improving the adhesion between the release layer and the support layer, the content of the low-density polyethylene (D) in the support layer is preferably 3 mass% or more, more preferably 5 mass% or more, and particularly preferably 7 mass% or more, with respect to 100 mass% of the total solid content of the support layer. On the other hand, if the content of the low-density polyethylene (D) is too large, the rigidity of the release film may be lowered, and therefore, the content is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less.
In the support layer, the content ratio of the total (B + C) of the polypropylene (B) and the high-density polyethylene (C) to the low-density polyethylene (D) { (B + C): (D) } preferably 97:3 to 60:40, more preferably 95:5 to 70:30, particularly preferably 93:7 to 75:25. by containing the above-mentioned ratio, the adhesion can be further improved while ensuring the rigidity of the release film.
The support layer may contain additives such as coloring pigments, antioxidants, and the like.
[ Release film ]
The release film of the present invention has at least a support layer and a release layer. The releasing layer may be disposed on the supporting layer directly or via another layer, and is preferably directly laminated on the supporting layer from the viewpoint of adhesion between the releasing layer and the supporting layer.
The surface of the release film of the present invention may be surface-treated with a silicone-based release agent or a release agent other than a silicone-based release agent, for example, a long-chain alkyl release agent, an alkyd release agent, a fluorine-based release agent, or the like. However, in view of good peelability from the adhesive sheet, transfer of the release agent to the adhesive sheet, and the like, it is preferable that the release film of the present invention is not subjected to the surface treatment with the release agent.
In the release film of the present invention, a back layer may be provided on the surface of the support layer opposite to the surface on which the release layer is provided. The back layer may be composed of the same or different composition as the release layer. The back surface layer will be described in detail later.
The thickness of the release film is not particularly limited, but is preferably 30 to 150. Mu.m, more preferably 40 to 120. Mu.m, and particularly preferably 50 to 100. Mu.m.
The thickness of the support layer is preferably 20 to 130 μm, more preferably 30 to 120 μm, still more preferably 40 to 100 μm, and particularly preferably 50 to 80 μm.
The thickness of the release layer is preferably 5 to 40 μm, more preferably 10 to 35 μm, and particularly preferably 15 to 30 μm.
From the viewpoint of peelability from the adhesive sheet and rigidity of the release film, the ratio (Rt/St) of the thickness (Rt) of the release layer to the thickness (St) of the support layer is preferably 0.05 to 0.50, more preferably 0.10 to 0.40, and particularly preferably 0.15 to 0.40.
The release film of the present invention can be produced by a known method such as a melt extrusion method or a melt extrusion lamination method. In particular, it is preferable to form the support layer, the release layer, and the optional back layer by melt coextrusion. This improves the adhesion between the release layer and the support layer. The melt coextrusion method is also preferable from the viewpoint of productivity.
The release film of the present invention is preferably composed of 3 layers of release layer/support layer/back layer, and these layers are preferably made of polyolefin as a main component, and more preferably formed into a film by the melt coextrusion method as described above. That is, the release film of the present invention is preferably formed from a multi-layer (3-layer) coextruded film of polyolefin.
The release film of the present invention can reduce the peeling force from the adhesive sheet by heating. The heating temperature is preferably 70 ℃ or higher, more preferably 75 ℃ or higher, and particularly preferably 80 ℃ or higher. The upper limit is about 130 ℃. The heating time is appropriately set according to the heating temperature and the form of the release film.
When heating is performed in a film transfer step such as a step of forming a release film, the heating is preferably performed at a temperature of 75 to 130 ℃ for 30 seconds or more, more preferably 60 seconds or more, and particularly preferably 100 seconds or more. On the other hand, when the release film is in the form of a roll, it is preferably heated at a temperature of, for example, 70 to 100 ℃ for 1 hour or more, more preferably 2 hours or more, and particularly preferably 5 hours or more.
The effect of reducing the peeling force of the release film by heating tends to be large when the release layer contains LLDPE and VLDPE. In the case of a release film having a release layer (containing LLDPE and VLDPE), by performing the above-described heating treatment, the release force can be reduced without forming irregularities on the surface of the release layer by embossing or the like.
That is, in the case of a release film having a release layer (which contains LLDPE and VLDPE), even if the arithmetic average roughness Ra of the surface of the release layer is less than 0.5 μm, the peeling force from the adhesive sheet can be reduced.
In the release film of the present invention, the release force (normal state release force) between the surface of the release layer and the pressure-sensitive adhesive tape is preferably 7.0N/50mm or less, more preferably 4.0N/50mm or less, still more preferably 2.0N/50mm or less, and particularly preferably 1.0N/50mm or less. The lower limit of the peeling force is about 0.05N/50 mm. The difference between the heat peeling force and the normal peeling force (a value obtained by subtracting the normal peeling force from the heat peeling force) is preferably 2.0N/50mm or less, more preferably 1.0N/50mm or less, still more preferably 0.7N/50mm or less, and particularly preferably 0.3N/50mm or less.
Here, the peeling force between the surface of the release layer and the pressure-sensitive adhesive tape was measured as the peeling force (B) in examples described later. The details of the measurement method are described later. Further, the normal peeling force and the heat peeling force were measured in accordance with the method of measuring the peeling force (B).
[ Back layer ]
The release film of the present invention preferably has a back layer on the side of the support layer opposite to the side having the release layer. The back layer may be provided to protect the support layer or to improve the slipperiness of the release film.
The back layer preferably contains polyolefin, and more preferably contains polyolefin as a main component. Here, the polyolefin-containing component means that the polyolefin is contained in an amount of 50 mass% or more, more preferably 60 mass% or more, further preferably 70 mass% or more, and particularly preferably 80 mass% or more, based on 100 mass% of the total solid content of the back layer. The upper limit is 100 mass%.
Examples of the polyolefin include homopolymers of ethylene, propylene and an α -olefin having 4 to 10 carbon atoms, and copolymers thereof. Examples of the α -olefin having 4 to 10 carbon atoms include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 3-methyl-1-butene, 4-methyl-1-pentene and the like.
Examples of the copolymer include a copolymer of ethylene and propylene, a copolymer of ethylene and an α -olefin having 4 to 10 carbon atoms, a copolymer of propylene and an α -olefin having 4 to 10 carbon atoms, and a copolymer of ethylene and propylene and an α -olefin having 4 to 10 carbon atoms.
The above polyolefins may be used alone, or two or more of them may be used in combination.
The back layer preferably contains at least one selected from the group consisting of polyethylene and polypropylene. As the polyethylene, the aforementioned low density polyethylene (a) can be preferably used. As the polypropylene, a homopolymer of propylene can be preferably used.
The back layer may be formed of the same composition as the releasing layer or may be formed of a different composition.
The back surface layer is preferably a relatively rough surface from the viewpoint of ensuring the slidability of the release film. In particular, when the surface of the release layer is smooth (when the unevenness due to embossing or the like is not formed), specifically, when the arithmetic mean roughness Ra of the surface of the release layer is less than 0.5 μm, and more specifically less than 0.3 μm, the back surface layer is preferably a rough surface. For example, the arithmetic average roughness Ra of the surface of the back layer is preferably 0.1 to 0.5. Mu.m, and more preferably 0.2 to 0.4. Mu.m. Similarly, the maximum height roughness Rz of the surface of the back layer is preferably 1.0 to 7.0 μm, more preferably 1.5 to 6.0 μm, and particularly preferably 2.0 to 5.0 μm.
In order to roughen the back layer, the back layer preferably contains a propylene homopolymer and a polyolefin other than the propylene homopolymer. As the polyolefin other than the propylene homopolymer, at least one selected from the group consisting of polyethylene, a homopolymer of an α -olefin having 4 to 10 carbon atoms, a copolymer of propylene and ethylene, and a copolymer of ethylene and an α -olefin having 4 to 10 carbon atoms is preferably used. Among them, a propylene-ethylene random copolymer is preferable.
The thickness of the back layer is preferably 2 to 40 μm, more preferably 5 to 40 μm, still more preferably 10 to 35 μm, and particularly preferably 15 to 30 μm.
In the case where the release film has a structure of release layer/support layer/back layer, the ratio of the thickness of the support layer to the total thickness of the release layer and back layer { (support layer thickness)/(total thickness of release layer and back layer) } is preferably 1.0 or more and less than 4.0, preferably 1.2 or more and less than 3.5, and particularly preferably 1.5 or more and less than 3.0, from the viewpoint of ensuring the rigidity of the release film and suppressing curling.
[ application example ]
The release film of the present invention is suitable as a release film for an adhesive sheet. That is, the release film of the present invention is suitable as a release film to be laminated on an adhesive layer of an adhesive sheet (which has an adhesive layer on a base film).
In particular, the release film of the present invention is suitable as a release film for an adhesive sheet for a hard disk drive. The adhesive sheet is preferably a non-silicone adhesive sheet that does not contain an organosilicon compound.
[ adhesive sheet ]
The pressure-sensitive adhesive sheet to which the release film of the present invention is applied is not particularly limited, and among the pressure-sensitive adhesive layers constituting the pressure-sensitive adhesive sheet, non-silicone pressure-sensitive adhesives such as acrylic pressure-sensitive adhesives, polyester pressure-sensitive adhesives, urethane pressure-sensitive adhesives, and rubber pressure-sensitive adhesives can be preferably used. Acrylic adhesives are particularly preferred.
Examples of the base film constituting the pressure-sensitive adhesive sheet include plastic films such as polyolefin films, polyester films, and polystyrene films, metal foils such as aluminum foils and copper foils, and laminated films of plastic films and metal foils.
The adhesive sheet laminate (adhesive sheet with a release film) of the present invention is an adhesive sheet laminate in which the release film of the present invention and an adhesive sheet are laminated, the adhesive sheet is an adhesive sheet having an adhesive layer on a substrate film, and the adhesive sheet laminate of the present invention is laminated such that the release layer of the release film and the adhesive layer of the adhesive sheet are in contact with each other.
The adhesive sheet laminate is preferably an adhesive sheet laminate for a hard disk drive. The adhesive sheet is preferably a non-silicone adhesive sheet.
Examples
The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.
[ measuring method and evaluation method ]
(1) Determination of the Density of polyethylene
Measured by the density gradient tube method (23 ℃ C.) according to JIS K7112 (1999).
(2) Determination of the crystallinity of the Polypropylene contained in the support layer
The release film thus produced was measured by the following method using a Differential Scanning Calorimeter (DSC) (DSC-60 Plus, manufactured by Shimadzu corporation).
< measuring method >
The temperature was raised from 0 ℃ to 250 ℃ at a temperature raising rate of 10 ℃/min to determine the heat of fusion. From the obtained heat of fusion Δ H (J/g), the crystallinity was determined according to the formula (Δ H/resin fraction/209) × 100 (%). Here, the resin fraction indicates the polymer fraction in the material, and when the resin component is 100%, the resin fraction is 1.0. 209 represents the heat of fusion (J/g) at 100% crystallization of polypropylene.
(3) Evaluation of adhesion
100 pieces of 1mm were drawn on the surface of the release layer of the release film 2 The cross cut of (2) was performed by sticking a transparent adhesive tape manufactured by Nichiban corporation to the cross cut, strongly pressing the tape with a finger, and then rapidly peeling the tape in a 90-degree direction. The adhesion was evaluated by the following criteria from the number of crosscuts remaining on the surface of the release layer from which the transparent adhesive tape was peeled.
A:100 of
B:80 to 99
C:50 to 79
D: less than 50.
(4) Measurement of peeling force (A)
The pressure-sensitive adhesive sheet was attached so that the pressure-sensitive adhesive surface of the pressure-sensitive adhesive sheet described below and the surface of the release layer of the release film were opposed to each other, and the pressure-sensitive adhesive sheet was attached to the release layer by reciprocating the pressure-sensitive adhesive sheet once while being pressed by a rubber roller having a weight of 5 kg.
The pressure-sensitive adhesive sheet laminate was left at room temperature (23. + -. 2 ℃ C.) for 24 hours to prepare a sample, the pressure-sensitive adhesive sheet laminate was heated at 40 ℃ for 10 days to prepare a sample, and the peel force when the pressure-sensitive adhesive sheet side was peeled off at 180 ℃ at a speed of 300mm/min was measured for each sample by a tensile tester (model "EZ-SX" manufactured by Shimadzu corporation).
The peeling force of the sample obtained by leaving the sample at room temperature (23. + -. 2 ℃) for 24 hours was defined as the normal peeling force, and the peeling force of the sample obtained by heating the sample at 40 ℃ for 10 days was defined as the heating peeling force.
< pressure-sensitive adhesive sheet >
In ethyl acetate, 93 parts by mass of n-butyl acrylate and 7 parts by mass of acrylic acid were solution-polymerized by a conventional method in the presence of a polymerization initiator (azobisisobutyronitrile), to obtain an acrylic polymer solution having a mass average molecular weight of 150 ten thousand (solid content concentration of 25 mass%). To 100 parts by mass of the acrylic polymer solution, 2 parts by mass of trimethylolpropane-modified tolylene diisocyanate ("Coronate L" manufactured by Nippon Polyurethane corporation) as a crosslinking agent was added to prepare an acrylic adhesive composition.
The acrylic pressure-sensitive adhesive composition was applied to a polyethylene terephthalate film (Lumiror (registered trademark) "S-105 manufactured by Toray corporation) having a thickness of 50 μm so that the dried thickness became 25 μm, and dried at 140 ℃ for 3 minutes to obtain an acrylic pressure-sensitive adhesive sheet.
(5) Measurement of peeling force (B)
An acrylic pressure-sensitive adhesive tape ("No. 31B" manufactured by ritong electrical corporation) was laminated so that the pressure-sensitive adhesive surface and the surface of the release layer of the release film were opposed to each other, and the adhesive was pressed with a rubber roller having a self weight of 5kg and reciprocated once to be bonded, and a sample obtained by leaving the tape at room temperature (23 ± 2 ℃) for 24 hours and a sample obtained by heating the tape at 70 ℃ for 24 hours were prepared. For each sample, the peel force when the pressure-sensitive adhesive sheet side was peeled off at 180 ℃ at a speed of 300mm/min was measured using a tensile tester (model "EZ-SX" manufactured by Shimadzu corporation).
The peel force of the sample obtained by leaving the sample at room temperature (23. + -. 2 ℃) for 24 hours was defined as the normal peel force, and the peel force of the sample obtained by heating the sample at 70 ℃ for 24 hours was defined as the heating peel force.
(6) Measurement of arithmetic average roughness Ra and maximum height roughness Rz of surface of Release layer (Back layer)
The measurement was carried out in accordance with JIS B0601 (2001) using a surface roughness measuring instrument ("Surftest SJ-400" manufactured by Mitutoyo, ltd.).
< measurement conditions >
Stylus tip radius: 2 μm
Measurement force: 0.75mN
Cutoff value: λ s =2.5 μm, λ c =0.8mm
(cut-off values after embossing treatment: λ s =2.5 μm, λ c =2.5 mm).
[ example 1]
A release film having a laminate of 3 release layers/support layer/back layer was produced by 3-layer melt coextrusion using the following materials. The mold temperature of each layer was set to 225 ℃ for the releasing layer, 250 ℃ for the supporting layer and 220 ℃ for the back layer, and the releasing film was extruded on a casting drum maintained at 60 ℃ so that the thickness of the releasing layer was 20 μm, the thickness of the supporting layer was 60 μm and the thickness of the back layer was 20 μm, thereby producing a releasing film having a total thickness of 100 μm.
The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer raw material: linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 )
Support layer stock: 90 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP0540, manufactured by Prime Polymer K.K.; density 0.903 g/cm) 3 ) 10 parts by mass of a mixture
Back side layer raw material: linear low-density polyethylene ("Evolue (registered trademark" SP0540; density 0.903g/cm, manufactured by Prime Polymer Co., ltd.)) 3 )。
[ example 2]
A release film having a 3-layer laminate structure of release layer/support layer/back layer was produced in the same manner as in example 1, except that the support layer material was changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
Support layer stock: 97 parts by mass of polypropylene ("Novatec PP (registered trademark)" FL4 manufactured by Japan Polypro K.K.) and linear low-density polyethylene ("Evolue (registered trademark)" SP0540 manufactured by Prime Polymer K.K.; density 0.903g/cm 3 ) 3 parts by mass of the mixture.
[ example 3]
A release film having a 3-layer laminate structure of release layer/support layer/back layer was produced in the same manner as in example 1, except that the support layer material was changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
Support layer stock: 93 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP0540, manufactured by Prime Polymer K.K.; density 0.903 g/cm) 3 ) 7 parts by mass of the mixture.
[ example 4]
A release film having a 3-layer laminate structure of release layer/support layer/back layer was produced in the same manner as in example 1, except that the support layer material was changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
Support layer stock: 80 parts by mass of polypropylene (Novatec PP (registered trademark) FL4 manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP0540 manufactured by Prime Polymer K.K.; density 0.903g/cm 3 ) 20 parts by mass of the mixture.
[ example 5]
A release film having a laminate structure of 3 release layers/support layer/back layer was produced in the same manner as in example 1, except that the support layer material was changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
Support layer stock: 70 parts by mass of polypropylene (Novatec PP (registered trademark) FL4 manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP0540 manufactured by Prime Polymer K.K.; density 0.903g/cm 3 ) 30 parts by mass of the mixture.
[ example 6]
A release film was produced in the same manner as in example 1, except that the raw materials of each layer were changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer raw material: linear low-density polyethylene (Prime Poly, K.K.)mer "Evolue (registered trademark)" SP2540; density 0.924g/cm 3 )
Support layer stock: 90 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP2540, manufactured by Prime Polymer K.K.; density 0.924g/cm 3 ) 10 parts by mass of a mixture
Back side layer stock; straight-chain low-density polyethylene ("Evolu (registered trademark)" SP2540 manufactured by Prime Polymer, ltd., density 0.924g/cm 3 )。
[ example 7]
A release film was produced in the same manner as in example 1, except that the raw materials of the respective layers were changed as described below. The crystallinity of polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer stock; branched Low Density polyethylene ("Sumikasen (registered trademark)" manufactured by Sumitomo chemical Co., ltd.) CE3059, density 0.924g/cm 3 )
Support layer stock: 90 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and branched low-density polyethylene (Sumikasen (registered trademark) CE3059, manufactured by Sumitomo chemical Co., ltd.; density 0.924g/cm 3 ) 10 parts by mass of a mixture
Back side layer raw material: branched Low Density polyethylene ("Sumikasen (registered trademark)" manufactured by Sumitomo chemical Co., ltd.) CE3059, density 0.924g/cm 3 )。
[ example 8]
A release film was produced in the same manner as in example 1, except that the raw materials of each layer were changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer raw material: linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 ) 80 parts by mass of a branched low-density polyethylene (manufactured by Sumitomo chemical Co., ltd.) "Sumikasen (registered trademark) "CE3059; density 0.924g/cm 3 ) 20 parts by mass of a mixture
Support layer stock: 90 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP0540, manufactured by Prime Polymer K.K.; density 0.903 g/cm) 3 ) 10 parts by mass of a mixture
Back side layer raw material: linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 ) 80 parts by mass of a branched low density polyethylene ("Sumikasen (registered trademark)" CE3059, manufactured by Sumitomo chemical Co., ltd.; density 0.924g/cm 3 ) 20 parts by mass of the mixture.
[ example 9]
A release film was produced in the same manner as in example 1, except that the raw materials of each layer were changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer stock: linear low-density polyethylene ("Evolue (registered trademark)" SP0540 manufactured by Prime Polymer, ltd.; density 0.903g/cm 3 ) 75 parts by mass of a branched low-density polyethylene ("sumikansen (registered trademark)" CE3059, manufactured by sumitomo chemical corporation; density 0.924g/cm 3 ) 15 parts by mass of a mixture with 10 parts by mass of an ethylene-propylene copolymer ("TAFMER P (registered trademark)" P0180, manufactured by Mitsui chemical Co., ltd.)
Support layer stock: 90 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP0540, manufactured by Prime Polymer K.K.; density 0.903 g/cm) 3 ) 10 parts by mass of a mixture
Back side layer raw material: linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 )。
[ example 10]
A release film having a release layer/support layer formed by stacking 2 layers was produced by a 2-layer melt coextrusion method using the following raw materials. The mold temperature of each layer was set to 225 ℃ for the releasing layer and 250 ℃ for the supporting layer, and the releasing layer was extruded on a casting drum maintained at 60 ℃ so that the thickness of the releasing layer was 25 μm and the thickness of the supporting layer was 75 μm, to produce a releasing film having a total thickness of 100 μm.
The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer raw material: linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 )
Support layer stock: 90 parts by mass of polypropylene ("Novatec PP (registered trademark)" FL4 manufactured by Japan Polypro corporation) and linear low-density polyethylene ("Evolue (registered trademark)" SP0540 manufactured by Prime Polymer corporation; density 0.903g/cm 3 ) 10 parts by mass of the mixture.
[ example 11]
A release film having a laminate of 3 layers of release layer/support layer/back layer was produced by 3-layer melt coextrusion using the following materials. The mold temperature of each layer was set to 225 ℃ for the release layer, 250 ℃ for the support layer and 250 ℃ for the back layer, and extrusion was performed on a casting drum maintained at 60 ℃ so that the thickness of the release layer was 15 μm, the thickness of the support layer was 40 μm and the thickness of the back layer was 5 μm, thereby producing a release film having a total thickness of 60 μm. The obtained release film was heat-treated at 90 ℃ for 60 seconds.
The arithmetic average roughness Ra of the surface of the back surface was 0.3 μm, and the maximum height roughness Rz was 2.6 μm.
< raw materials for layers >
Release layer raw material: straight-chain low-density polyethylene ("Evolu (registered trademark)" SP2540 manufactured by Prime Polymer, ltd., density 0.924g/cm 3 ) 90 parts by mass of a polyethylene copolymer obtained by copolymerizing ethylene with a linear ultra-low density polyethylene (ethylene-1-octene copolymer; "AFFINITY (registered trademark)" KC8852G manufactured by Dow Chemical Co., ltd; density 0.875g/cm 3 ) 10 parts by mass of a mixture
Support layer stock: high-density Polyethylene ("Novatec (registered trademark)" HF562 manufactured by Japan Polyethylene Co., ltd.; density =0.961g/cm 3 ) 75 parts by mass of a polyethylene blend with a linear low density polyethylene ("Evolue (registered trademark)" SP2540 manufactured by print Polymer, ltd.; density 0.924g/cm 3 ) 25 parts by mass of a mixture
Back side layer raw material: a mixture of 80 parts by mass of polypropylene ("Nobrene (registered trademark)" manufactured by sumitomo chemical corporation) and 20 parts by mass of a propylene-ethylene random copolymer (ethylene content 5% by mass).
[ example 12]
A release film having a 3-layer laminate structure of release layer/support layer/back layer was produced in the same manner as in example 11, except that the release layer material was changed as described below, and heat treatment was performed in the same manner. The arithmetic average roughness Ra of the back surface layer was 0.3 μm, and the maximum height roughness Rz was 2.6 μm.
Release layer raw material: straight-chain low-density polyethylene ("Evolu (registered trademark)" SP2540 manufactured by Prime Polymer, ltd., density 0.924g/cm 3 ) 85 parts by mass of a polyethylene copolymer and a linear ultra-low density polyethylene (ethylene-1-butene copolymer; "TAFMER P (registered trademark)" P1070S manufactured by mitsui chemical corporation; density 0.870g/cm 3 ) 15 parts by mass of the mixture.
[ example 13]
A release film having a 3-layer laminate structure of release layer/support layer/back layer was produced in the same manner as in example 11, except that the support layer material was changed as described below, and heat treatment was performed in the same manner. The crystallinity of the polypropylene in the support layer of the release film was 70%. The arithmetic average roughness Ra of the surface of the back surface was 0.3 μm, and the maximum height roughness Rz was 2.6 μm.
Support layer stock: 75 parts by mass of polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.) and linear low-density polyethylene (Evolue SP2540, manufactured by Prime Polymer K.K.; density 0.924g/cm 3 ) 25 parts by mass of the mixture.
[ example 14]
A release film having a 3-layer laminate structure of release layer/support layer/back layer was produced in the same manner as in example 11, except that the support layer material was changed as described below, and heat treatment was performed in the same manner. The crystallinity of the polypropylene in the support layer of the release film was 70%. The arithmetic average roughness Ra of the surface of the back surface was 0.3 μm, and the maximum height roughness Rz was 2.6 μm.
Support layer stock: high-density Polyethylene ("Novatec (registered trademark)" HF562 manufactured by Japan Polyethylene Co., ltd.; density =0.961g/cm 3 ) 60 parts by mass, 15 parts by mass of polypropylene (Nobrene (registered trademark) FLX80E4, manufactured by sumitomo chemical corporation) and linear low-density polyethylene (Evolue (registered trademark) SP2540, manufactured by Prime Polymer, manufactured by sumitomo chemical corporation; density 0.924g/cm 3 ) 25 parts by mass of the mixture.
Comparative example 1
A release film was produced in the same manner as in example 1, except that the raw materials of each layer were changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer raw material: branched Low Density polyethylene ("Sumikasen (registered trademark)" manufactured by Sumitomo chemical Co., ltd.) CE3059, density 0.924g/cm 3 )
Support layer stock: polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.)
Back side layer raw material: branched Low Density polyethylene ("Sumikasen (registered trademark)" manufactured by Sumitomo chemical Co., ltd.) CE3059, density 0.924g/cm 3 )。
Comparative example 2
A release film was produced in the same manner as in example 1, except that the raw materials of each layer were changed as described below. The crystallinity of the polypropylene in the support layer of the release film was 70%.
< raw materials for the layers >
Release layer raw material: linear low-density polyethylene (manufactured by Prime Polymer, ltd.)"Evolue (registered trademark)" SP0540; density 0.903g/cm 3 ) 75 parts by mass of a branched low density polyethylene ("sumikansen (registered trademark)" CE3059 manufactured by sumitomo chemical co., ltd.; density 0.924g/cm 3 ) 15 parts by mass of a mixture with 10 parts by mass of an ethylene-propylene copolymer ("TAFMER P (registered trademark)" P0180, manufactured by Mitsui chemical Co., ltd.)
Support layer stock: polypropylene (Novatec PP (registered trademark) FL4, manufactured by Japan Polypro K.K.)
Back side layer raw material: linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 )。
Comparative example 3
On a polyethylene terephthalate film (manufactured by Toray corporation, "Lumiror (registered trademark)" S-105) having a thickness of 50 μm, a branched low-density polyethylene (manufactured by Sumikasen chemical Co., ltd. "" CE3059; density 0.924 g/cm) was first introduced in series at a mold temperature of 325 ℃ 3 ) Extruded and laminated to form a primer layer (UC layer; dry thickness 10 μm). Subsequently, a release layer (dry thickness: 10 μm) was laminated on the undercoat layer by extruding the following release layer raw material at a mold temperature of 273 ℃.
< Release layer Material >
Linear low-density polyethylene ("Evolu (registered trademark)" SP0540, manufactured by Prime Polymer, inc.; density 0.903g/cm 3 ) 75 parts by mass of a branched low-density polyethylene ("sumikansen (registered trademark)" CE3059, manufactured by sumitomo chemical corporation; density 0.924g/cm 3 ) 15 parts by mass and 10 parts by mass of an ethylene-propylene copolymer ("TAFMER P (registered trademark)" P0180, manufactured by Mitsui chemical Co., ltd.).
[ evaluation ]
The release films of the examples and comparative examples prepared above were evaluated by the measurement method and the evaluation method described above. The results are shown in table 1.
[ Table 1]
[ examples 21 to 31]
Each of the release films produced in examples 1 and 6 to 11 was subjected to embossing treatment using the following embossing roll, to obtain a release film having fine irregularities formed on the surface of the release layer. The embossing treatment is performed by pressing an embossing roll heated to 140 ℃ against the release layer of the release film. The relationship between the release film and the emboss roller before the embossing treatment is shown in table 2.
< embossing roll >
Embossing roller 1 embossing roller made in the shape of a deep pear skin
Embossing roll 2, embossing roll machined to a shallower pearskin shape
Embossing roll 3 embossing roll machined in the shape of a silk pattern
[ evaluation ]
The release film of the example produced above was evaluated by the measurement method and the evaluation method described above. The results are shown in Table 2.
[ Table 2]
Claims (12)
1. A release film comprising at least a supporting layer and a release layer, the release layer having a density of 0.940g/cm 3 A low density polyethylene (a) comprising: selected from polypropylene (B) and a density of 0.941g/cm 3 At least one member selected from the group consisting of the high-density polyethylene (C) and having a density of 0.940g/cm 3 The following low-density polyethylene (D),
wherein the low-density polyethylene (A) in the release layer at least has a density of 0.850 to 0.940g/cm 3 The linear low-density polyethylene of (2), and,
the release layer comprises a density of 0.900g/cm 3 Above and 0.940g/cm 3 The following linear low-density polyethylene and a density of 0.850g/cm 3 AboveAnd less than 0.900g/cm 3 The linear low-density polyethylene has a density of 0.850 to 0.940g/cm 3 The linear low-density polyethylene of (3).
2. The release film according to claim 1, wherein the release layer contains 0.900g/cm relative to the density 3 Above and 0.940g/cm 3 The density of the linear low-density polyethylene is 0.850g/cm, wherein the linear low-density polyethylene is 2 to 30 parts by mass per 100 parts by mass of the polyethylene 3 More than and less than 0.900g/cm 3 The linear low-density polyethylene of (3).
3. The release film according to claim 1, wherein the crystallinity of the polypropylene (B) contained in the support layer is 40% or more.
4. The release film according to claim 1, wherein the arithmetic average roughness Ra of the surface of the release layer is 0.5 to 7.0 μm.
5. The release film according to claim 1, wherein in the support layer, a content ratio of a total (B + C) of polypropylene (B) and high-density polyethylene (C) to low-density polyethylene (D) { (B + C): (D) } 97 in mass ratio: 3 to 60:40.
6. the release film according to claim 1, wherein a ratio (Rt/St) of a thickness (Rt) of the release layer to a thickness (St) of the support layer is 0.05 to 0.50.
7. The release film according to claim 1, wherein a back layer is provided on a surface of the support layer opposite to the surface having the release layer.
8. The release film of claim 7, wherein the back layer comprises a polyolefin.
9. The release film according to claim 7 or 8, wherein the arithmetic average roughness Ra of the surface of the back surface layer is 0.1 to 0.5 μm.
10. The release film of claim 1 comprising a multilayer coextruded film of a polyolefin.
11. A pressure-sensitive adhesive sheet laminate in which the release film according to any one of claims 1 to 10 and a pressure-sensitive adhesive sheet are laminated, the pressure-sensitive adhesive sheet having an adhesive layer on a substrate film, the pressure-sensitive adhesive sheet laminate being formed by laminating the release layer of the release film and the adhesive layer of the pressure-sensitive adhesive sheet so as to be in contact with each other.
12. The adhesive sheet laminate according to claim 11, which is used for a hard disk drive.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2018-167531 | 2018-09-07 | ||
| JP2018167531 | 2018-09-07 | ||
| PCT/JP2019/032749 WO2020050037A1 (en) | 2018-09-07 | 2019-08-22 | Release film and adhesive sheet laminate using same |
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| CN112638647B true CN112638647B (en) | 2022-12-06 |
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| JP (1) | JP2020075509A (en) |
| KR (1) | KR102627147B1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006321164A (en) * | 2005-05-20 | 2006-11-30 | Tosoh Corp | Polypropylene multilayer film |
| JP2007169466A (en) * | 2005-12-22 | 2007-07-05 | Tosoh Corp | Release liner |
| WO2018110361A1 (en) * | 2016-12-16 | 2018-06-21 | 東レフィルム加工株式会社 | Release film and protective film |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0342020Y2 (en) * | 1988-05-11 | 1991-09-03 | ||
| JP2965825B2 (en) * | 1993-07-22 | 1999-10-18 | 出光石油化学株式会社 | Multilayer structure and easy-open container |
| JP2005350650A (en) | 2004-05-14 | 2005-12-22 | Nitto Denko Corp | Release liner and pressure-sensitive adhesive tape or sheet using the same |
| JP5284976B2 (en) | 2007-11-08 | 2013-09-11 | リンテック株式会社 | Release sheet and adhesive |
| KR101828736B1 (en) * | 2008-06-27 | 2018-03-29 | 트레데가르 필름 프로덕츠 코포레이션 | Protective film with release surface |
| US9138979B2 (en) * | 2012-05-02 | 2015-09-22 | Tredegar Film Products Corporation | Low peel force surface protection film and method of using same |
| JP6195789B2 (en) * | 2013-12-20 | 2017-09-13 | サン・トックス株式会社 | Multilayer sealant film |
| CN106103078A (en) * | 2014-03-21 | 2016-11-09 | 德国英菲亚纳有限责任两合公司 | Packaging |
| US10150896B2 (en) * | 2014-12-19 | 2018-12-11 | Tredegar Film Products Corporation | Surface protection film |
| JP2017177579A (en) * | 2016-03-30 | 2017-10-05 | 株式会社細川洋行 | Easily-peelable sealant film |
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2019
- 2019-08-22 KR KR1020217003657A patent/KR102627147B1/en active IP Right Grant
- 2019-08-22 WO PCT/JP2019/032749 patent/WO2020050037A1/en active Application Filing
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006321164A (en) * | 2005-05-20 | 2006-11-30 | Tosoh Corp | Polypropylene multilayer film |
| JP2007169466A (en) * | 2005-12-22 | 2007-07-05 | Tosoh Corp | Release liner |
| WO2018110361A1 (en) * | 2016-12-16 | 2018-06-21 | 東レフィルム加工株式会社 | Release film and protective film |
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| TW202022074A (en) | 2020-06-16 |
| KR20210057007A (en) | 2021-05-20 |
| CN112638647A (en) | 2021-04-09 |
| WO2020050037A1 (en) | 2020-03-12 |
| TWI816873B (en) | 2023-10-01 |
| JP2020075509A (en) | 2020-05-21 |
| KR102627147B1 (en) | 2024-01-19 |
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