CN101547790A - Release liner and pressure-sensitive adhesive sheet - Google Patents

Release liner and pressure-sensitive adhesive sheet Download PDF

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Publication number
CN101547790A
CN101547790A CNA2007800431049A CN200780043104A CN101547790A CN 101547790 A CN101547790 A CN 101547790A CN A2007800431049 A CNA2007800431049 A CN A2007800431049A CN 200780043104 A CN200780043104 A CN 200780043104A CN 101547790 A CN101547790 A CN 101547790A
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CN
China
Prior art keywords
pressure
sensitive adhesive
release liner
layer
density polyethylene
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Pending
Application number
CNA2007800431049A
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Chinese (zh)
Inventor
野中亚纪子
井口伸儿
安藤雅彦
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Nitto Denko Corp
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Nitto Denko Corp
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Publication of CN101547790A publication Critical patent/CN101547790A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • 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
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered 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
    • B32B27/08—Layered 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B32B27/205—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents the fillers creating voids or cavities, e.g. by stretching
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    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
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    • 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
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    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • 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
    • C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
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    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/02—Synthetic macromolecular particles
    • B32B2264/0214—Particles made of materials belonging to B32B27/00
    • B32B2264/0228—Vinyl resin particles, e.g. polyvinyl acetate, polyvinyl alcohol polymers or ethylene-vinyl acetate copolymers
    • B32B2264/0242—Vinyl halide, e.g. PVC, PVDC, PVF or PVDF (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/02—Synthetic macromolecular particles
    • B32B2264/0214—Particles made of materials belonging to B32B27/00
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
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    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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    • B32B2405/00—Adhesive articles, e.g. adhesive tapes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/412—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of microspheres
    • 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
    • C09J2423/00—Presence of polyolefin
    • C09J2423/04—Presence of homo or copolymers of ethene
    • C09J2423/045—Presence of homo or copolymers of ethene in the release coating
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T428/2852—Adhesive compositions
    • Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)

Abstract

The present invention discloses a release liner having a multilayer structure composed of at least three layers, characterized in that one of the surface layers is a layer made of high-density polyethylene, the other is a layer made of low-density polyethylene, and the liner has an interlayer comprising low-density polyethylene as the only resin component. Also provided is a pressure-sensitive adhesive sheet comprising the release liner and at least one pressure-sensitive adhesive layer, characterized in that the peel force between the release liner and the pressure-sensitive adhesive layer, X (N/mm), and the rigidity of the release liner [(Young's modulus of the release liner)x(thickness)<3>], Y (N.mm), satisfy the relationships 0<X=0.285 and 0<Y=180X<4>+0.1. The release liner and the pressure-sensitive adhesive sheet have excellent releasability. Even when stored in a curved state, the adhesive sheet suffers no liner lifting. The release liner has excellent suitability for recycling.

Description

Release liner and pressure-sensitive adhesive sheet
Technical field
The present invention relates to release liner and pressure-sensitive adhesive sheet.Specifically, relate to and be suitable for release liner that pressure-sensitive adhesive sheet uses and pressure-sensitive adhesive sheet with this release liner.
Background technology
Pressure-sensitive adhesive sheet possesses usually: have the sheet material (hereinafter referred to as release liner) and the pressure-sensitive adhesive layer that contacts with this sheet material (for example being made of acrylic compounds pressure-sensitive adhesive etc.) of the function peeled off, can peel off between sheet material and pressure-sensitive adhesive layer.
As the formation method of above-mentioned release liner, known all the time have: use silicone based remover etc., only make method that remover solidifies or the release liner base material at least with a side that the pressure-sensitive adhesive layer contact on coating remover and make the method etc. (obtaining the release liner of this peeling agent layer in only obtaining by layer release liner that constitutes that remover is solidified form, the latter among the former) of its curing as outermost laminar structure.In addition, in recent years,, use the release liner that constitutes by polyethylene or polypropylene as the release liner that does not need such coating.Among them, as the method that peeling force is reduced, known low density polyethylene (LDPE) and the straight chain shape low density polyethylene (LDPE) (for example, with reference to patent documentation 1,2) of in peel ply, using.
But, for pressure-sensitive adhesive sheet, for example in the situation with double faced adhesive tape adhesion coating etc., make single face be adhesive on the clung body and under the state that release liner is set on another face, cutting off, process, when using, preserve afterwards to a certain degree during.Particularly under the situations for long parts or flexible member may such as sealing strip as automobile, from saving the viewpoint in space, they are preserved under the state of reeling sometimes.Like this, when preserving under the state of the pressure-sensitive adhesive bending tablet that will be provided with release liner, release liner is peeled off from pressure-sensitive adhesive layer top sometimes, produces so-called " lining perk ", and the pressure-sensitive adhesive layer is contaminated.
In order to suppress above-mentioned lining perk, can use the release liner that improves peeling force, though improve the lining perk this moment, reduce but peel off function.That is, suppress the lining perk and peel off function and become to disappear that grows the relation of (trading off) for this reason.In addition, in order to suppress the lining perk, known use contains the method (for example with reference to patent documentation 3) of the material of polar group as peel ply, and these have the problem that is difficult to utilize again.Release liner is owing to go out of use after using, and therefore, from the viewpoint of carrying capacity of environment, present situation is the release liner of seeking a kind of excellence of usability again.
Patent documentation 1: Japanese Patent Publication 51-20205 communique
Patent documentation 2: Japanese kokai publication sho 55-80479 communique
Patent documentation 3: No. 3179516 communique of Japan's special permission
Summary of the invention
The present invention is in order to address the above problem, its purpose is the release liner that a kind of pressure-sensitive adhesive sheet is provided and is suitable for this pressure-sensitive adhesive sheet, wherein, the fissility excellence of described pressure-sensitive adhesive sheet, and the lining perk inhibition excellence of release liner from the pressure-sensitive adhesive layer.
The inventor has carried out deep research to achieve these goals, found that, utilizes and can realize peeling force and lining perk inhibition simultaneously by the release liner that specific resin is formed, laminar structure constitutes.In addition, find to be under the situation of specific relation, obtain excellent especially pressure-sensitive adhesive sheet, thereby finished the present invention in the peeling force of pressure-sensitive adhesive layer and release liner and the rigidity of release liner.
That is, the invention provides a kind of release liner, have at least 3 layers layer structure, it is characterized in that, a top layer is the layer that is made of high density polyethylene (HDPE), and another top layer is the layer that is made of low density polyethylene (LDPE), also has and in fact only contains the intermediate layer of low density polyethylene (LDPE) as resinous principle.
In addition, the invention provides above-mentioned release liner, its thickness is 10～500 μ m.
In addition, the invention provides a kind of pressure-sensitive adhesive sheet, the pressure-sensitive adhesive layer that it comprises above-mentioned release liner and at least 1 layer is characterized in that, the peeling force X of release liner and pressure-sensitive adhesive layer and the rigidity Y of release liner satisfy following relation:
0<X≤0.285
0<Y<180X 4+0.1
Wherein, the unit of peeling force X is N/mm, and rigidity Y is Young's modulus * (thickness) of release liner 3, its unit is Nmm.
In addition, the invention provides above-mentioned pressure-sensitive adhesive sheet, wherein, the pressure-sensitive adhesive layer is to form as main component with acrylic tackifier.
In addition, the invention provides above-mentioned pressure-sensitive adhesive sheet, wherein, the pressure-sensitive adhesive layer is the pressure-sensitive adhesive layer that contains bubble and/or the small orbicule of hollow.
Release liner of the present invention and pressure-sensitive adhesive sheet, the fissility excellence, and when under the state of bending, preserving etc., can not produce the lining perk yet.In addition, owing to do not contain polar group etc. and have the simple structure that each layer is made of polyethylene, thereby usability is also excellent again.Therefore, from the viewpoint of performance and environment, useful on industry.
Description of drawings
Fig. 1 is the figure of the rigidity Y of release liner in the pressure-sensitive adhesive sheet of representing to be obtained by embodiment and comparative example with respect to the relation of peeling force X.
Fig. 2 is that test film is fixed in the approximate vertical view of the method for fixed station in the evaluation method of expression " lining perk ".
Symbol description
1 case shape fixed station
2 test films
The specific embodiment
Below explain the present invention.
In addition, in the present invention, it is banded that release liner, pressure-sensitive adhesive sheet can be respectively, and promptly comprises and peel off carrying material, pressure-sensitive adhesive band.
Release liner of the present invention has the top layer that comprises the top layer that is made of high density polyethylene (HDPE), is made of low density polyethylene (LDPE) and in fact only uses at least 3 layer the layer structure of low density polyethylene (LDPE) as the intermediate layer of resinous principle.In addition, the above-mentioned intermediate layer that is made of low density polyethylene (LDPE) is the layer different with the top layer that is made of low density polyethylene (LDPE).In addition, " high density polyethylene (HDPE) " in the present invention is meant that the density that records based on JIS K 6922-2 is 930 (kg/m 3) above polyethylene, " low density polyethylene (LDPE) " is meant that the density that records based on JIS K 6922-2 is 865 (kg/m 3) above and be lower than 930 (kg/m 3) polyethylene." low density polyethylene (LDPE) " among the present invention defines as the general name of following material, that is: the polyethylene with long-chain side chain (chain length is not particularly limited) that vinyl monomer is obtained by the high-pressure process polymerization; The polyethylene that is called so-called " low density polyethylene (LDPE) " or " ultra-low density polyethylene " that vinyl monomer is obtained by the high-pressure process polymerization; And with ethene and carbon number the polyethylene that is called " straight chain shape low density polyethylene (LDPE) " (length of the short-chain branches of this moment is carbon number 1～6) that 3～8 'alpha '-olefin monomers obtains by the low-pressure process polymerization; " the ethene-alpha-olefin copolymer elastomer " that in above-mentioned density range, comprises in addition.
Constitute a top layer of the present invention by high density polyethylene (HDPE) constitute the layer in, as resinous principle, be main component with the high density polyethylene (HDPE).Particularly, in the resinous principle that constitutes this layer, need contain high density polyethylene (HDPE) 50 weight % above (for example, 50～100 weight %), be preferably 60～100 weight %.By the top layer that this high density polyethylene (HDPE) constitutes, can only contain high density polyethylene (HDPE) as resinous principle, also can mix other resinous principle.
As the above-specified high density polyethylene, preferred density is 940 (kg/m 3) above [for example, 940～960 (kg/m 3), more preferably 942 (kg/m 3) above [for example, 942～960 (kg/m 3)].
As above-mentioned other resinous principle, there is no particular limitation, still, for example from the viewpoint of rerum naturas such as control fissility, is preferably low density polyethylene (LDPE).When other resin was low density polyethylene (LDPE), the mixed proportion of these resinous principles with respect to high density polyethylene (HDPE) 100 weight portions, was preferably about 0～100 weight portion, more preferably 0～67 weight portion.When mixed proportion was hanged down, the lining perk suppressed effect and uprises, and when mixed proportion is high, had fissility and became good tendency, and therefore, mixed proportion can be selected in right amount from the viewpoint consideration of the flexibility of each characteristic and sheet material integral body of the present invention.In addition, contain the layer of high density polyethylene (HDPE) and low density polyethylene (LDPE) with the mixing ratio of 50:50, be made as the layer that constitutes by high density polyethylene (HDPE) in the present invention as resinous principle.
In constituting the layer that constitutes by high density polyethylene (HDPE) on top layer of the present invention, except resinous principle, can in the scope of not damaging effect of the present invention, cooperate various additives such as pigment, filler, lubricant, age resister.
Intermediate layer of the present invention needs only to contain low density polyethylene (LDPE) in fact as resinous principle.Particularly, constitute in the resinous principle in this intermediate layer, low density polyethylene (LDPE) need account for more than the 95 weight %, is preferably more than the 99 weight %.In addition, " low density polyethylene (LDPE) " at this can be independent or multiple mixing, the above-mentioned content of employing for the total amount of multiple low density polyethylene (LDPE).Contain straight chain shape low density polyethylene (LDPE) in the above-mentioned low density polyethylene (LDPE).In release liner of the present invention, by using the layer that in the intermediate layer, only uses above-mentioned low density polyethylene (LDPE), can improve flexibility, lining perk inhibition is improved.In addition, release liner of the present invention, can have the intermediate layer (other intermediate layer) in addition, intermediate layer that only forms as resinous principle with above-mentioned low density polyethylene (LDPE), but under the situation that is called " intermediate layer of the present invention ", be meant in the release liner of the present invention the intermediate layer of only using low density polyethylene (LDPE) as the layer of necessity.
As above-mentioned low density polyethylene (LDPE), preferred density is 890 (kg/m 3) above and be lower than 930 (kg/m 3).
In intermediate layer of the present invention, can be in the scope of not damaging effect of the present invention, cooperate various additives such as pigment except that resinous principle, filler, lubricant, age resister.
Constituting the layer that is made of low density polyethylene (LDPE) on another top layer of the present invention, from the viewpoint of fissility, as resinous principle, is main component with the low density polyethylene (LDPE).Particularly, in the resinous principle that constitutes this layer, need contain low density polyethylene (LDPE) 50 weight % above (for example, 50～100 weight %), be preferably 60～100 weight %.By the top layer that this low density polyethylene (LDPE) constitutes, can only contain low density polyethylene (LDPE) as resinous principle, also can mix other resinous principle.
As above-mentioned low density polyethylene (LDPE), preferred density is 890 (kg/m 3) above and be lower than 930 (kg/m 3).
As above-mentioned other resinous principle, there is no particular limitation, still, for example from the viewpoint of rerum naturas such as control fissility, is preferably high density polyethylene (HDPE).When other resin was high density polyethylene (HDPE), mixed proportion was preferably 0～50 weight portion with respect to low density polyethylene (LDPE) 100 weight portions, more preferably 0～20 weight portion, more preferably 0～10 weight portion.
In constituting the layer that constitutes by low density polyethylene (LDPE) on top layer of the present invention, except resinous principle, can in the scope of not damaging effect of the present invention, cooperate various additives such as pigment, filler, lubricant, age resister.
In addition, in the present invention, do not contain pigment in the top layer and only carry out painted the intermediate layer by top layer and the intermediate layer that is made of low density polyethylene (LDPE) being set respectively, can making.Suit to control the balance in top layer and intermediate layer, can in suitable scope, keep the relation of fissility and intensity, therefore preferred.
Release liner of the present invention can use two top layers as peel ply.The preferred especially layer that is made of high density polyethylene (HDPE) that uses uses the layer that is made of low density polyethylene (LDPE) as the low stripping force side as high peeling force side.Usually on the layer that constitutes by high density polyethylene (HDPE), the pressure-sensitive adhesive layer is set, by low density polyethylene (LDPE) constitute the layer, for example under the situation of the shape that the sheet that will be made of pressure-sensitive adhesive layer and release liner is reeled, play the effect that is used to show uncoiling smoothly as back layer.
Release liner of the present invention can have the intermediate layer (other intermediate layer) in addition, intermediate layer that only forms as resinous principle with low density polyethylene (LDPE).The intermediate layer of like this other can be used as adhesive layer, the dyed layer of the interlayer adhesive tension that for example is used to improve each layer, the layer that is used to give other functions is provided with.
Under the situation that release liner of the present invention in fact only is made of as resinous principle low density polyethylene (LDPE), high density polyethylene (HDPE), usability improves again, and is therefore preferred.With respect to all resins composition of release liner, the resinous principle beyond low density polyethylene (LDPE), the high density polyethylene (HDPE) preferably is lower than 20 weight %, more preferably less than 10 weight %.
The thickness of release liner of the present invention is wound into the roller shape when preserving etc. at lining, from needing the viewpoint of flexibility, is preferably below the 500 μ m, more preferably below the 200 μ m, more preferably below the 150 μ m.In addition, from the viewpoint of operability, thickness is preferably more than the 10 μ m, more preferably more than the 30 μ m, more preferably more than the 50 μ m, most preferably is more than the 100 μ m.
In the release liner of the present invention, the thickness in the intermediate layer that forms as resinous principle with low density polyethylene (LDPE) only, the viewpoint from the control rigidity is preferably 5～480 μ m, more preferably 10～180 μ m.In addition, constitute the thickness of the layer that constitutes by high density polyethylene (HDPE) on top layer, from the viewpoint of fissility, be preferably 2.5～250 μ m, more preferably 5～100 μ m.In addition, constitute the thickness of the layer that constitutes by low density polyethylene (LDPE) on top layer, from the viewpoint of fissility, be preferably 2.5～250 μ m, more preferably 5～100 μ m.The thickness in the intermediate layer of other beyond above-mentioned, and different, there is no particular limitation, but be preferably below about 50 μ m according to the purpose that layer is set.
The Young's modulus of release liner of the present invention, with the relation of thickness in reach appropriate value with rigidity Y described later mode suit to select.For example, the thickness of release liner is under the situation of 50～200 μ m, and Young's modulus is preferably 30～1400 (Nmm 2), 50～500 (Nmm more preferably 2).
Release liner of the present invention can be made by known habitual sheet formation methods such as fusion system embrane method (T die methods, blow moulding), solution film-forming methods.As the laminating method of release liner of the present invention, also there is no particular limitation, can use known customary ways such as coetrusion, dry lamination method, wet type laminating.Wherein, the viewpoint from productivity ratio is preferably coetrusion.
In above-mentioned, particularly when using T mould system embrane method, have the good tendency of hear resistance, therefore preferred.When hear resistance is good, for example, under the state that pastes the pressure-sensitive adhesive sheet of paying the band release liner, even (for example on clung body (for example sealing strip rubber), carry out silicone coated, organosilicon sintering circuit, 120 ℃ * 3 minutes) time, do not produce the perk of release liner yet or peel off, therefore can be preferred for these purposes.
Pressure-sensitive adhesive sheet of the present invention contains the pressure-sensitive adhesive layer of above-mentioned release liner and at least 1 layer and constitutes.
Particularly as pressure-sensitive adhesive sheet of the present invention, the peeling force X of release liner and pressure-sensitive adhesive layer and the rigidity Y of release liner are when satisfying the condition of determining in order to lower inequality, can realize lining perk inhibition simultaneously and peel off function with high level, therefore preferred.
0<X≤0.285 0<Y<180X 4+0.1
The peeling force X of pressure-sensitive adhesive layer of the present invention and release liner from bringing into play the viewpoint of good fissility, is preferably more than 0 (N/mm) and below 0.285 (N/mm), more preferably 0.15～0.25 (N/mm).When peeling force X surpasses 0.285 (N/mm), be difficult to sometimes release liner is peeled off from the pressure-sensitive adhesive layer, when peeling force X is 0 (N/mm), lose the function of protection adhesive surface.In addition, above-mentioned peeling force X is the value that obtains by 180 ° of disbonded tests, particularly, and for example by obtaining at the assay method shown in the disbonded test described later.
The Young's modulus of the rigidity Y[release liner of release liner of the present invention * (thickness) 3], from suppressing the viewpoint of lining perk, be preferably greater than 0 (Nmm) and less than 180X 4+ 0.1 (Nmm).Rigidity Y is Young's modulus * (thickness) with the flow direction of release liner 3The value of expression, expression is for the easiness of the distortion of bending stress.The rigidity Y of release liner is 180X 4+ 0.1 when above, and when making the pressure-sensitive adhesive band with this release liner crooked, according to degree of crook and difference, but the repulsion of release liner increases with respect to bonding force, produces the lining perk sometimes.Rigidity Y is 0.01～1.3 (Nmm) more preferably, is preferably 0.01～0.8 (Nmm) especially.In addition, above-mentioned rigidity Y particularly for example obtains by the assay method shown in the implosion test described later.In addition, relation [0＜Y＜180X of above-mentioned peeling force X and rigidity Y 4+ 0.1] be, based on the measured value of experiment and the Heuristics that obtains by polynomial approximation.
The pressure-sensitive adhesive layer that uses in the pressure-sensitive adhesive sheet of the present invention, under the situation or the situation (for example being that 100 μ m are with first-class) of pressure-sensitive adhesive bed thickness that change as foaming body (the pressure-sensitive adhesive layer that contains bubble) equal-volume greatly, owing to occur the lining perk especially significantly easily, therefore, control above-mentioned X, Y particular importance.
Pressure-sensitive adhesive layer of the present invention is to form as main component with pressure-sensitive adhesive.In the pressure-sensitive adhesive layer, the content of pressure-sensitive adhesive is preferably more than the 50 weight %, more preferably more than the 90 weight %.
As above-mentioned pressure-sensitive adhesive, there is no particular limitation, the preferred polyacrylate pressure-sensitive adhesive that contains polyacrylate and/or polymethacrylates (hereinafter referred to as poly-(methyl) acrylate, other too) of using.The polyacrylate pressure-sensitive adhesive, with (methyl) alkyl acrylate as necessary monomer component, but as required itself and the modification of copolymerization are carried out acrylic polymer that polymerization (perhaps copolymerization) forms as host with monomer component.As above-mentioned polymerization, there is no particular limitation, can use known for a person skilled in the art customary ways such as UV polymerization, solution polymerization process or emulsion polymerization.Wherein, when particularly forming thick pressure-sensitive adhesive layer etc., the UV polymerization preferably used.
As above-mentioned (methyl) alkyl acrylate, the preference example is as (methyl) butyl acrylate, (methyl) 2-EHA etc.But as the modification monomer component of copolymerization, preferred illustration (methyl) acrylic acid 2-hydroxy methacrylate, (methyl) acrylic acid, styrene, vinyl acetate etc.Copolymerization ratio (weight ratio) during with the copolymerization of modified monomer composition, there is no particular limitation, but (methyl) alkyl acrylate/modified monomer is preferably 100/0～70/30, and more preferably 97/3～80/20.As the polyacrylate pressure-sensitive adhesive, in the scope of not damaging effect of the present invention, can contain various additives as required.In addition, the polyacrylate pressure-sensitive adhesive can be used separately, also can will mix use more than 2 kinds by known mixed method, stirring means.
The thickness of pressure-sensitive adhesive layer of the present invention, according to the kind of adhesive layer and difference, there is no particular limitation, is about 1 μ m～5mm.For example, under the situation that contains bubble etc., be preferably 100 μ m～4mm, more preferably 200 μ m～3mm.
Pressure-sensitive adhesive layer of the present invention can contain bubble.By containing bubble, for example improve for concavo-convex tracing ability, therefore preferred.Contain method as bubble, there is no particular limitation, for example can enumerate: mixed surfactant is made the method for bubble in the pressure-sensitive adhesive composition.As such surfactant, particularly preferred example is shown fluorine class surfactant.
At this moment, as blendable bubbles volume in the pressure-sensitive adhesive composition, there is no particular limitation, according to use etc., can be in not damaging the scope of adhesive property etc. suitable the selection, for example, with respect to pressure-sensitive adhesive composition in its entirety volume, from the anterethic viewpoint of stress, under be limited to 10 volume % above (more preferably more than the 11 volume %, more preferably more than the 12 volume %), from the viewpoint of adhesivity, the upper limit is preferably 50 volume % following (more preferably below the 40 volume %, more preferably 30 volume % are following).
The shape that above-mentioned bubble has usually spherical (particularly spherical shape), but can have oval-shaped spherical.In above-mentioned bubble, as its average bubble footpath (diameter), there is no particular limitation, for example selects in the scope of 1～1000 μ m (being preferably 10～500 μ m, more preferably 30～300 μ m).
In addition, the gas componant that contains in the bubble (forms the gas componant of bubble; Be sometimes referred to as " bubble formation gas "), there is no particular limitation, except inert gases such as nitrogen, carbon dioxide, argon gas, can use all gases compositions such as air.Form gas as bubble, mixing after bubble forms gas, under the situation of carrying out reaction such as polymerisation, use the material that does not suppress its reaction very important.Form gas as bubble, never the viewpoint of inhibitory reaction or cost etc. is set out, and is preferably nitrogen.
In addition, the pressure-sensitive adhesive layer can contain the small orbicule of hollow.By containing the small orbicule of hollow, for example can improve the clipping viscous force, processability is improved.The small orbicule of hollow can use separately, also can make up more than 2 kinds and use.
As the small orbicule of above-mentioned hollow, can be the small orbicule of the mineral-type of hollow, also can be the small orbicule of organic class of hollow.Particularly, in the small orbicule of hollow,, for example can enumerate: the hollow ball of glass systems such as hollow glass ball as the small orbicule of the mineral-type of hollow; The hollow ball of metallic compound systems such as hollow alumina balls; Porcelain system hollow ball such as hollow ceramic ball etc.In addition, as the small orbicule of organic class of hollow, for example can enumerate: resinous hollow ball such as hollow acrylic acid ball, hollow vinylidene chloride ball etc.In addition, on the surface of the small orbicule of hollow, can implement various surface treatments (for example, low surface tension processing of being undertaken by organosilicon compound and fluoride compound etc. etc.).
As the particle diameter (average grain diameter) of the small orbicule of above-mentioned hollow, there is no particular limitation, for example selects in the scope of 1～500 μ m (being preferably 5～200 μ m, more preferably 10～100 μ m).
Proportion as the small orbicule of above-mentioned hollow is not particularly limited, for example from 0.1～0.8g/cm 3(be preferably 0.12～0.5g/cm 3) scope in select.The proportion of the small orbicule of hollow is less than 0.1g/cm 3The time, in the pressure-sensitive adhesive composition, cooperate the small orbicule of hollow and when mixing, perk increases, be difficult to disperse equably, on the other hand, greater than 0.8g/cm 3The time, price height, cost up.
Use amount as the small orbicule of above-mentioned hollow is not particularly limited, for example with respect to the cumulative volume of pressure-sensitive adhesive composition layer, and can be from 10～50 volume % (volume %), be preferably in the scope of 15～40 volume % and select.During the use amount less than 10 volume % of the small orbicule of hollow, the effect of adding the small orbicule of hollow reduces, and when surpassing 50 volume %, adhesive tension reduces sometimes.
For the pressure-sensitive adhesive layer that contains above-mentioned bubble and/or the small orbicule of hollow, can use the pressure-sensitive adhesive floor of for example TOHKEMY 2006-022189 number record etc.
In the pressure-sensitive adhesive layer of the present invention, can contain suitable additive according to purposes.For example, kind according to pressure-sensitive adhesive, (for example can contain crosslinking agent, PIC class crosslinking agent, silicone based crosslinking agent, the epoxies crosslinking agent, alkyl etherificate melamine class crosslinking agent etc.), tackifier are (for example, by the rosin derivative resin, polyterpene resin, Petropols, the normal temperature that oil-soluble phenolic resin etc. constitute is solid down, semi-solid or aqueous tackifier), plasticizer, filler, age resister, antioxidant, colouring agent (pigment or dyestuff etc.), containing weight average molecular weight is the suitable additives such as fluorine class surfactant surfactant in addition of the fluorine-based polymer more than 20000.In addition, for example, can use the pigment (coloring pigment) that does not hinder photopolymerisable degree for painted using Photoepolymerizationinitiater initiater to form under the situation of pressure-sensitive adhesive layer.If be the situation of black, then can use for example carbon black etc.
As the chip architecture of pressure-sensitive adhesive sheet, for example can be structure that (1) is made of the pressure-sensitive adhesive layer and the release liner of the individual layer of no support base material with release liner of the present invention; (2) on support base material two-sided, possesses the pressure-sensitive adhesive sheet of the double faced adhesive tape viscosity of pressure-sensitive adhesive layer and release liner respectively.In addition, be provided with respectively on sheet is two-sided under the situation of release liner, release liner of the present invention can be provided with on the one side at least.
In addition, pressure-sensitive adhesive sheet of the present invention, for example be provided with the structure of pressure-sensitive adhesive layer (the perhaps two-sided laminate that is provided with the pressure-sensitive adhesive layer of support base material) for a surface (release surface) of release liner, by being wound into roller shape (perhaps that sheet is overlapping), can be for the surperficial contacted structure of a side of lining be set in another surface (back side) of release liner and the above-mentioned pressure-sensitive adhesive layer.
In addition,, in pressure-sensitive adhesive band or sheet, can use known habitual base material, for example can use: stationery base materials such as paper as above-mentioned support base material; Fiber-like base materials such as cloth, nonwoven, net; Metal species such as metal forming, metallic plate base material; Plastics class base materials such as the film of plastics or sheet; Rubber-like base materials such as sheet rubber; Suitable thin slice bodies such as foaming foaming body such as sheet or their layered product (particularly the layered product between the layered product of plastics class base material and other base materials or the plastic foil (or sheet) etc.).As the raw material in this plastic foil or the sheet, for example can enumerate: polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, vinyl-vinyl acetate copolymer (EVA) etc. are the olefine kind resin of monomer component with the alpha-olefin; PETG (PET), PEN (PEN), polybutylene terephthalate (PBT) polyester resins such as (PBT); Polyvinyl chloride (PVC); The vinyl acetate esters resin; Polyphenylene sulfide (PPS); Polyamide (nylon), fully aromatic polyamide amide-type resins such as (aramide); Polyimide based resin; Polyether-ether-ketone (PEEK) etc.These raw materials can use separately or be used in combination more than 2 kinds.
When using the release liner beyond the release liner of the present invention in the pressure-sensitive adhesive sheet of the present invention, can use known habitual release liner.Particularly, for example can preferably use in the release liner (dividing plate) of release liner with formation lift-off processing layer at least one face of base material.As such release liner base material, can enumerate: plastics class base material film (synthetic resin film) such as polyester film (PETG film etc.), olefine kind resin film (polyethylene film, polypropylene screen etc.), polychloroethylene film, polyimide film, PA membrane (nylon membrane), artificial cortina or stationery (vellum, Japan paper, brown paper, glassine paper, synthetic paper, be coated with outward paper (ト ッ プ コ-ト Paper) etc.), in addition, can also enumerate and they are carried out base material (2～3 layers complexs) that multiple stratification forms etc. by lamination or coextrusion etc.In addition, the stripping treatment agent as constituting the lift-off processing layer has no particular limits, and for example can use silicone based stripping treatment agent, fluorine class stripping treatment agent.Chain alkyl class stripping treatment agent etc.Stripping treatment agent can use separately or be used in combination more than 2 kinds.In addition, when release liner of the present invention is used with the release liner beyond it, the release liner beyond the release liner of the present invention is peeled off used earlier.
As the method that pressure-sensitive adhesive layer of the present invention is set, according to the form of pressure-sensitive adhesive layer or pressure-sensitive adhesive sheet and difference, there is no particular limitation, for example can enumerate: the method that (1) uses known coating process to be coated with, to solidify on release liner; (2) method of fitting etc. after the pressure-sensitive adhesive layer is set on the support base material, with release liner.
In addition, pressure-sensitive adhesive sheet can have forms such as sheet, band shape.In addition, also can be for being wound into the form of roller shape.
Pressure-sensitive adhesive sheet of the present invention is preserved under case of bending, and perhaps the pressure-sensitive adhesive layer is to contain under the situations such as type of bubble of easy deformation, and the lining perk that does not also produce release liner in addition, can be brought into play the excellent function of peeling off in use.Therefore, preferred especially as using for the sheet adhesive or the adhesive tape purposes of the parts of microscler shape or complicated shape or soft parts.Particularly, preferably wait and use as the gluing double-faced adhesive tape of using etc. of the sealing strip of automobile or other elastomeric material.
[assay method of rerum natura and Evaluation on effect method]
(1) disbonded test (peeling force X)
Make the assess sample (length direction is sheet machinery (MD) direction) of the wide strip of 7mm by the pressure-sensitive adhesive sheet that obtains in embodiment, the comparative example.
The polyester film that to implement from the pressure-sensitive adhesive sheet of sample after organosilicon is handled is peeled off, fit on the polyester film that thickness is 50 μ m (Dongli Ltd.'s system " Le ミ ラ-S-10 "), again polyester film is fitted to rigidity of support plate body (fix on SUS304BA plate/50mm * 150mm),
Use universal tensile testing machine (ミ ネ ベ ア Co., Ltd.'s system " TG-1kNB "), carry out 180 ° of disbonded tests.The release liner layback is stretched, measured resistance, as peeling force X (N/mm).
In addition, test is carried out based on JIS Z0237, carries out in 300mm/ minute with draw speed (cutting head speed (crosshead speed)) under 23 ℃, the environment of 60%RH.In addition, test number (TN) is 3 times (mean value).
When peeling force X surpasses 0.285 (N/mm), be difficult to peel off, thereby peel off dysfunction.
(2) implosion test (rigidity Y)
For the pressure-sensitive adhesive sheet that obtains by embodiment, comparative example release liner separately, (measure direction: machinery (MD) direction) carry out punching, obtain assess sample No. 3 with dumbbell.
Use universal tensile testing machine under former length (measured length) 20mm, specimen width 5mm, draw speed 500mm/ minute, to carry out tension test, measure the Young's modulus (measure number of times: 3 times) of release liner.In addition, use amesdial to measure the thickness of release liner.
Use these measured values to calculate the rigidity Y[Young's modulus of release liner * (thickness) 3] (Nmm).
(3) lining perk
By the pressure-sensitive adhesive sheet that obtains in embodiment, the comparative example make 7mm wide * sample of the strip of 100mm (operating direction).
The polyester film that to implement from the pressure-sensitive adhesive sheet of sample after organosilicon is handled is peeled off, fit to the PVC sheets that is coated with the polyurethanes silane coupling agent (45mm is wide * 150mm length * 1mm is thick, Riken Technos Co., Ltd. system) on, makes 5kg roller (roller width: 65mm) come and go 1 time and carry out crimping.With it as test film.
After preserving 24 hours, be that inboard mode is bent into ellipticity as shown in Figure 2 with the release liner, be fixed on the case shape fixed station of long 100mm * wide 50mm * high 30mm test film.Measure the length of lining perk part after 72 hours, the length partly of perk in 1 test film is amounted to.In addition, test is to carry out under 23 ℃, the environment of 60%RH.
The total length of perk part is 10mm when following, judges lining perk inhibition good (zero), when surpassing 10mm, and judgement lining perk inhibition bad (*).
(4) heat resistant test (hear resistance)
By the pressure-sensitive adhesive sheet that obtains in embodiment 4 and the comparative example 2 make 7mm wide * sample of the strip of 100mm (operating direction).
The polyester film that to implement from the pressure-sensitive adhesive sheet of sample after organosilicon is handled is peeled off, fit to the PVC sheets that is coated with the polyurethanes silane coupling agent (45mm is wide * 150mm length * 1mm is thick, Riken Technos Co., Ltd. system) on, makes 5kg roller (roller width: 65mm) come and go 1 time and carry out crimping.With it as test film.
Preserve after 24 hours, in heat resistant test, do not make the PVC sheets distortion, face PVC sheets and the sample opposition side is used two-sided tape (Nitto Denko Corp's system, " No.500 ") be fitted on stainless steel (SUS) plate with the PVC sheets same size, in baking oven, heat-treated under 120 ℃ 3 minutes.
Under room temperature environment, observe the test film that has just taken out, do not observe the perk of release liner or situation about peeling off is judged as hear resistance good (zero), observes perk or situation about peeling off is judged as hear resistance bad (*).
Embodiment
Below the present invention will be described in more detail based on embodiment, but the present invention is not limited to these embodiment.
Embodiment 1
14 μ m), intermediate layer (thickness: 43 μ m), back layer (thickness: the release liner of Gou Chenging (thickness: 100 μ m) 43 μ m) is sheet by 3 layers of coextrusion blow-moulding process with following composition extrusion molding, makes by peel ply (thickness:.
Peel ply: high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " Evolue SP4520 ", density 942kg/m 3)
Intermediate layer and back layer: ldpe resin (Japan Polyethylene Corp.'s system, trade name " Novatec LD YE30 ", density 920kg/m 3)
The acrylic foam tape of fitting on above-mentioned release liner (Nitto Denko Corp's system " A4008 " contains the individual layer pressure-sensitive adhesive layer of bubble) makes the aspect of peeling off of lining contact with the pressure-sensitive adhesive layer of adhesive tape.In addition, on another pressure-sensitive adhesive layer, fit and implemented the polyester film (Mitsubishi Chemical polyester film Co., Ltd. system " MRF38 ") that organosilicon is handled, obtain pressure-sensitive adhesive sheet.
Embodiment 2
10 μ m), intermediate layer (thickness: 20 μ m), back layer (thickness: the release liner of Gou Chenging (thickness: 50 μ m) 20 μ m) is sheet by 3 layers of coextrusion blow-moulding process with following composition extrusion molding, makes by peel ply (thickness:.
Peel ply: high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " HI-ZEX 3300F ", density 950kg/m 3)/ldpe resin (Japan Polyethylene Corp.'s system, trade name " Novatec LD LF440HB ", density 925kg/m 3)
[mixing ratio of above-specified high density polyethylene/low density polyethylene (LDPE) (weight ratio)=60/40]
Intermediate layer and back layer: ldpe resin (Japan Polyethylene Corp.'s system, trade name " Novatec LD UF641 ", density 927kg/m 3)
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Embodiment 3
14 μ m), intermediate layer (thickness: 43 μ m), back layer (thickness: the release liner of Gou Chenging (thickness: 100 μ m) 43 μ m) is sheet by 3 layers of coextrusion blow-moulding process with following composition extrusion molding, makes by peel ply (thickness:.
Peel ply: high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " HI-ZEX 3300F ", density 950kg/m 3)
Intermediate layer and back layer: ldpe resin (Japan Polyethylene Corp.'s system, trade name " Novatec LL UF331 ", density 923kg/m 3)
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Embodiment 4
37 μ m), intermediate layer (thickness: 52.5 μ m), back layer (thickness: the release liner of Gou Chenging (thickness: 100 μ m) 10.5 μ m) is sheet by 3 layers of coextrusion blow-moulding process with following composition extrusion molding, makes by peel ply (thickness:.
Peel ply: high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " HI-ZEX 3300F ", density 950kg/m 3)
Intermediate layer and back layer: ldpe resin (TOSOH Co., Ltd's system, trade name " OM05B ", density 924kg/m 3)
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Comparative example 1
As release liner, use is with ldpe resin (Japan Unicar Co., Ltd. system, trade name " NUC8160 " for raw material, (love is known plastics industry Co., Ltd. system to polyethylene individual layer extrusion molding film, thickness: 100 μ m), in addition, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Comparative example 2
14 μ m), intermediate layer (thickness: 43 μ m), back layer (thickness: the release liner of Gou Chenging (thickness: 100 μ m) 43 μ m) is sheet by 3 layers of coextrusion blow-moulding process with following composition extrusion molding, makes by peel ply (thickness:.
Peel ply: ldpe resin (Japan Polyethylene Corp.'s system, trade name " Novatec LD UF641 ", density 927kg/m 3)
Intermediate layer and back layer: high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " HI-ZEX 3300F ", density 950kg/m 3)/ldpe resin (Japan Polyethylene Corp.'s system, trade name " Novatec LD LF440HB ", density 925kg/m 3)
[mixing ratio of above-specified high density polyethylene/low density polyethylene (LDPE) (weight ratio)=60/40]
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Comparative example 3
With polyvinyl resin (Japan Polyethylene Corp.'s system, trade name " NC499A ", density 935kg/m 3) melted extrusion forming is a sheet under 150 ℃ of melt temperatures, pressure 10Mpa, carries out the nature cooling, makes release liner (180 μ m).
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Comparative example 4
With polyvinyl resin (DOW Chemical Co., Ltd. system, trade name " Xu.59900.20 ", density 940kg/m 3) melted extrusion forming is a sheet under 150 ℃ of melt temperatures, pressure 10Mpa, carries out the nature cooling, makes release liner (180 μ m).
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Comparative example 5
With high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " HI-ZEX5000SF ", density 956kg/m 3) melted extrusion forming is a sheet under 150 ℃ of melt temperatures, pressure 10Mpa, carries out the nature cooling, makes release liner (100 μ m).
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
Comparative example 6
With high-density polyethylene resin (the Prime Polymer of Co., Ltd. system, trade name " HI-ZEX7000F ", density 952kg/m 3) melted extrusion forming is a sheet under 150 ℃ of melt temperatures, pressure 10Mpa, carries out the nature cooling, makes release liner (150 μ m).
Except using above-mentioned release liner, operation obtains pressure-sensitive adhesive sheet similarly to Example 1.
The result of the test of disbonded test, implosion test, lining perk is shown in table 1 and Fig. 1.Among Fig. 1 zero is the data that do not produce the sheet (embodiment 1～4, comparative example 5,6) of lining perk, * be the data that produce the sheet (comparative example 1～4) of lining perk.In addition, the curve in the curve map is represented Y=180X 4+ 0.1, dotted line is represented X=0.285.As shown in Table 1, constitute the release liner (embodiment) that forms by the specific resin of the present invention, its rigidity and peeling force show excellent function and the lining perk inhibition peeled off in suitable scope.On the other hand, do not have the release liner (comparative example) that the specific resin of the present invention constitutes, lining perk inhibition insufficient (comparative example 1～4) or fissility insufficient (comparative example 5,6) can not realize peeling off function and lining perk inhibition simultaneously.
Table 1
The lining perk Peeling force X (N/mm) Release liner rigidity Y (Nmm)
Embodiment 1 ○ 0.20 0.12
Embodiment 2 ○ 0.10 0.03
Embodiment 3 ○ 0.22 0.22
Embodiment 4 ○ 0.23 0.17
Comparative example 1 × 0.05 0.15
Comparative example 2 × 0.13 0.29
Comparative example 3 × 0.21 1.03
Comparative example 4 × 0.27 1.23
Comparative example 5 ○ 0.29 0.57
Comparative example 6 ○ 0.30 1.31
In addition, for embodiment 4 and comparative example 2, carry out heat resistant test, relatively hear resistance.Its result, the hear resistance of pressure-sensitive adhesive sheet of the present invention (embodiment 4) good (zero), and on the other hand, the hear resistance of the pressure-sensitive adhesive sheet of comparative example 2 bad (*).
The possibility of utilizing on the industry
Release liner of the present invention and pressure-sensitive adhesive sheet, fissility is excellent, and in the situation of preserving under the state of bending etc., does not also produce the lining perk. In addition, do not contain polar group etc., have the simple structure that each layer is made of polyethylene, therefore recycling property is also excellent. Therefore, particularly preferably as using for sheet adhesive or the adhesive tape purposes of the parts of microscler shape or complicated shape or soft parts. More specifically, as gluing double-faced adhesive tape of using etc. of the sealing strip of automobile or other elastomeric material etc., from the viewpoint of performance and environment, industrially useful.

Claims (5)

1. release liner, have at least 3 layers layer structure, it is characterized in that, a top layer is the layer that is made of high density polyethylene (HDPE), another top layer is the layer that is made of low density polyethylene (LDPE), also has and in fact only contains the intermediate layer of low density polyethylene (LDPE) as resinous principle.
2. release liner according to claim 1, its thickness are 10～500 μ m.
3. pressure-sensitive adhesive sheet, the pressure-sensitive adhesive layer that it comprises claim 1 or 2 described release liners and at least 1 layer is characterized in that the peeling force X of release liner and pressure-sensitive adhesive layer and the rigidity Y of release liner satisfy following relation:
0<X≤0.285
0<Y<180X 4+0.1
Wherein, the unit of peeling force X is N/mm, and rigidity Y is Young's modulus * (thickness) of release liner 3, its unit is Nmm.
4. pressure-sensitive adhesive sheet according to claim 3, wherein, the pressure-sensitive adhesive layer is to form as main component with acrylic tackifier.
5. according to claim 3 or 4 described pressure-sensitive adhesive sheets, wherein, the pressure-sensitive adhesive layer is the pressure-sensitive adhesive layer that contains bubble and/or the small orbicule of hollow.
CNA2007800431049A 2006-12-05 2007-11-30 Release liner and pressure-sensitive adhesive sheet Pending CN101547790A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006327888 2006-12-05
JP327888/2006 2006-12-05
JP275950/2007 2007-10-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102190969A (en) * 2010-03-11 2011-09-21 日东电工株式会社 Adhesive tape
CN111526613A (en) * 2020-05-18 2020-08-11 无锡格菲电子薄膜科技有限公司 Copper electrode graphene electrothermal film and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102190969A (en) * 2010-03-11 2011-09-21 日东电工株式会社 Adhesive tape
CN102190969B (en) * 2010-03-11 2014-06-11 日东电工株式会社 Adhesive tape
CN111526613A (en) * 2020-05-18 2020-08-11 无锡格菲电子薄膜科技有限公司 Copper electrode graphene electrothermal film and preparation method thereof
CN111526613B (en) * 2020-05-18 2022-07-12 无锡格菲电子薄膜科技有限公司 Copper electrode graphene electrothermal film and preparation method thereof

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Application publication date: 20090930