CN108473829A - Double-sided adhesive sheet - Google Patents
Double-sided adhesive sheet Download PDFInfo
- Publication number
- CN108473829A CN108473829A CN201780005806.1A CN201780005806A CN108473829A CN 108473829 A CN108473829 A CN 108473829A CN 201780005806 A CN201780005806 A CN 201780005806A CN 108473829 A CN108473829 A CN 108473829A
- Authority
- CN
- China
- Prior art keywords
- double
- adhesive sheet
- sided adhesive
- supporter
- thickness
- 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.)
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Classifications
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such 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
- C09J7/20—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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
-
- 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
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
Abstract
The present invention provides a kind of double-sided adhesive sheet, and the 1st adhesive phase and the 2nd adhesive phase are respectively provided on the two sides of supporter, wherein the supporter includes polylactic acid, and the thickness of the supporter is 1.5 μm or less.Even if the double-sided adhesive sheet can fully show high adhesion if film is made, and the inhibition after stripping the phenomenon that residual adhesive is excellent.
Description
Technical field
The present invention relates to double-sided adhesive sheets.
Background technology
The bonding force of bonding sheet also relies on the bonding on supporter other than dependent on the composition of adhesive, polarity
The thickness of the coating weight of agent, adhesive phase i.e. to be formed.That is, in general, the bonding sheet of adhesive thickness, bonding sheet
Bonding force it is higher.
The thickness of adhesive phase possessed by the bonding sheet of label, adhesive tape etc. can according to the purposes of bonding sheet suitable for setting,
But it due to the decline for worrying bonding force, is not likely to be set as its thickness to be thinner than 10 μm.
But in recent years, the expectations such as electronic equipment, optical device are thinned, for such electronic equipment, optics
Bonding sheet used in being temporarily bonded when the engagement or processing of the component of equipment etc., it is desirable that also have while filming
Characteristic as high adhesion.
In order to cope with such requirement, it is proposed that various bonding sheets.
For example, Patent Document 1 discloses a kind of double-faced adhesive tape, is the poly- to benzene of 0.002~0.012mm in thickness
The two sides of the supporters such as naphthalate (PET) film have adhesive phase, and its overall thickness be 0.003mm less than
0.03mm, fracture strength are 2~26MPa/10mm wide.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2005-105212 bulletins
Invention content
Problems to be solved by the invention
But have electronic equipment, the optical device etc. after slimming across double-sided adhesive sheet 2 are pressed from both sides sometimes
Component engages.In order to cope with the requirement of equipment filming, narrow gaps between 2 components to be joined in most cases.Therefore,
For the further filming of double-sided adhesive sheet requirement used when engagement.
The method that further filming as reply double-sided adhesive sheet requires, it is contemplated that constitute the bonding of double-sided adhesive sheet
The filming of each layer such as oxidant layer, supporter.
But by the further filming of adhesive phase in the case of, can cause the reduction of bonding force, worry 2 components
It engages insufficient.
On the other hand, from the aspect of the manufacture of supporter, intensity, there is limitation in the filming of supporter.For example, patent
In double-sided adhesive sheet recorded in document 1, from the viewpoint of forming, it is difficult to make the thickness of the PET film used as supporter
Less than 2 μm.
In addition, the method for the filming as double-sided adhesive sheet, it is also contemplated that be made without supporter (core material) and have
The double-sided adhesive sheet of structure made of useful 2 release liners clamping adhesive phase, to reduce the thickness of supporter (core material)
Method.
If it is omitted, however, that supporter (core material) holds then when removing a release liner in 2 release liners
It is also easy to produce " after stripping the phenomenon that residual adhesive ", so-called refers to release liner " after stripping the phenomenon that residual adhesive "
It is partly residual on two release liners the given interface that should remove is peeling-off, adhesive phase cohesion destroys
There are the phenomenons that adhesive phase is such.
It should be noted that in patent document 1, do not carry out about while keeping the bonding force of double-sided adhesive sheet into one
It walks the research of filming and generates " after stripping residual adhesive for avoiding along with the filming of adhesive phase
The phenomenon that " research.
The present invention is to carry out in view of the above problems, even if its purpose is to provide one kind in the case where film is made
Also the excellent double-sided adhesive sheet of high adhesion, the inhibition after stripping the phenomenon that residual adhesive can fully be shown.
Solution to the problem
The inventors of the present invention have found, in the double-sided adhesive sheet that the two sides of supporter has adhesive phase, by making
Given value is adjusted to hereinafter, the above subject can be solved with the supporter comprising polylactic acid and by the thickness of the supporter.
That is, the present invention provides following [1]~[8].
[1] a kind of double-sided adhesive sheet is respectively provided with the 1st adhesive phase and the 2nd adhesive phase on the two sides of supporter,
In,
The supporter includes polylactic acid, and the thickness of the supporter is 1.5 μm or less.
[2] double-sided adhesive sheet described in above-mentioned [1], wherein the film-strength of the supporter is 1~300mN.
[3] double-sided adhesive sheet described in above-mentioned [1] or [2], wherein described poly- relative to the gross mass of the supporter
The content of lactic acid is 70~100 mass %.
[4] double-sided adhesive sheet described in any one of above-mentioned [1]~[3], wherein the 1st adhesive phase and the 2nd adhesive phase
At least one of be the layer formed by the acrylic adhesives comprising acrylic resin.
[5] double-sided adhesive sheet described in any one of above-mentioned [1]~[4], wherein the 1st adhesive phase and the 2nd adhesive phase
Respective thickness is separately 0.5~3.0 μm.
[6] double-sided adhesive sheet described in any one of above-mentioned [1]~[5], wherein viscous relative to the 1st adhesive phase and the 2nd
The ratio of the overall thickness 100 of mixture layer, the thickness of the supporter is 5.0~70.0.
[7] double-sided adhesive sheet described in any one of above-mentioned [1]~[6], wherein folder is pasted across the double-sided adhesive sheet
The overall thickness of double-sided adhesive sheet when 2 adherends is 6.0 μm or less.
[8] double-sided adhesive sheet described in any one of above-mentioned [1]~[7], in 23 DEG C, the ring of 50%RH (relative humidity)
It is pasted on stainless steel plate (SUS304 steel plates, No. 120 grindings) under border and after 24 hours, is based on JIS Z0237:2000 measure
Bonding force be 1.5N/25mm or more.
The effect of invention
The double-sided adhesive sheet of the present invention can fully show high adhesion in the case where film is made, and shell
The inhibition of the phenomenon that from rear residual adhesive is excellent.
Description of the drawings
[Fig. 1] is the sectional view of the double-sided adhesive sheet of the composition for the double-sided adhesive sheet for showing one embodiment of the present invention.
Symbol description
1,2 double-sided adhesive sheet
11 supporters
The 1st adhesive phases of 12a
The 2nd adhesive phases of 12b
13a, 13b release liner
Specific implementation mode
In the present specification, it is to pass through reflection to constitute the thickness of each layer of double-sided adhesive sheet and the overall thickness of double-sided adhesive sheet
The light splitting of light is parsed and the value measured, in particular to the value measured based on the method described in embodiment.
In the present specification, the value of weight average molecular weight (Mw) is gathered using the standard that gel permeation chromatography (GPC) measures
The value of styrene conversion, in particular to the value measured based on the method described in embodiment.
In the present specification, for example, " (methyl) acrylate " indicate be both acrylate and methacrylate
Term, other similar terms are also the same.
(composition of double-sided adhesive sheet)
As long as the double-sided adhesive sheet of the present invention is respectively provided with the 1st adhesive phase and the 2nd adhesive phase on the two sides of supporter
(hereinafter, also referred to collectively as " adhesive phase "), is not particularly limited.
Fig. 1 is the sectional view of the double-sided adhesive sheet of the composition for the double-sided adhesive sheet for showing one embodiment of the present invention.
As the double-sided adhesive sheet of one embodiment of the present invention, it can be cited for example that such both-sided adhesive shown in Fig. 1 (a)
Piece 1 has the composition for being directly laminated with the 1st adhesive phase 12a and the 2nd adhesive phase 12b respectively on the two sides of supporter 11.
In addition, from the viewpoint of operability, or double-sided adhesive sheet 2 as shown in Fig. 1 (b), the 1st
It is further laminated with release liner 13a, 13b respectively on the surface of adhesive phase 12a and the 2nd adhesive phase 12b.
In addition, the double-sided adhesive sheet as one embodiment of the present invention, can also be have in the 1st adhesive phase 12a and
Two sides is laminated on the arbitrary surfaces of 2nd adhesive phase 12b and implements the release liner of lift-off processing and the composition that is rolled into a roll
Double-sided adhesive sheet.
That is, the double-sided adhesive sheet of one embodiment of the present invention can be one in the 1st adhesive phase and the 2nd adhesive phase
The composition of release liner is further laminated on the surface of person or both.
The total thickness of double-sided adhesive sheet when being pasted on 2 adherends across the double-sided adhesive sheet of the present invention as folder
Degree, it is excellent from the viewpoint of the double-sided adhesive sheet that formation can also be used even with the engagement at 2 positions of narrow gaps
Be selected as 6.0 μm or less, more preferably 5.0 μm or less, further preferably 4.0 μm or less, still more preferably for 3.5 μm with
Under, particularly preferably 3.0 μm or less.
The present invention double-sided adhesive sheet even if film turn to 6.0 μm hereinafter, can fully show high adhesion, moreover it is possible to
The phenomenon that enough effectively inhibiting the residual adhesive after stripping.
On the other hand, it can express out excellent bonding force from formation while can effectively inhibit to remain after stripping and glue
From the viewpoint of the double-sided adhesive sheet of the phenomenon that mixture, when folder is pasted on 2 adherends across the double-sided adhesive sheet of the present invention
The double-sided adhesive sheet overall thickness be preferably 1.5 μm or more, more preferably 1.7 μm or more, be more preferably 2.0 μm with
On.
It should be noted that in the present specification, " double-sided adhesive sheet of filming " refers to, folder is viscous across double-sided adhesive sheet
The overall thickness of double-sided adhesive sheet is adjusted to 6.0 μm of double-sided adhesive sheets below when being affixed on 2 adherends.
In addition, in the present specification, " double-sided adhesive sheet is total when folder is pasted on 2 adherends across double-sided adhesive sheet
Thickness " refers to removing the thickness for the double-sided adhesive sheet being pasted on other than the thickness of the layers such as the release liner being removed when adherend
Degree, for example, referring to " Z1 " in double-sided adhesive sheet 1 shown in FIG. 1, thickness shown in " Z2 " in double-sided adhesive sheet 2.
Do not include figure that is, in " overall thickness of double-sided adhesive sheet when folder is pasted on 2 adherends across double-sided adhesive sheet "
The thickness of release liner 13a, 13b possessed by double-sided adhesive sheet 2 shown in 1 (b), but include when being for example pasted on adherend
Also the thickness of the layer other than the supporter and adhesive phase that are not removed.
As the layer other than the supporter and adhesive phase not also being removed when being pasted on adherend, it can be cited for example that
Priming coat, antistatic backing and UV-absorbing layer etc., these layers are preferably disposed on supporter and the 1st adhesive phase or the 2nd bonding
Between oxidant layer.
In the double-sided adhesive sheet of one embodiment of the present invention, relative to the 1st adhesive phase and the total thickness of the 2nd adhesive phase
Degree 100, the ratio of the thickness of supporter is preferably 5.0~70.0, more preferably 5.2~50.0, further preferably 5.5~
40.0, still more preferably it is 6.0~30.0, particularly preferably 6.2~20.0.
The ratio shows excellent bonding force and can effectively press down if it is in above range, being formed
Make the double-sided adhesive sheet after stripping the phenomenon that residual adhesive.It is additionally possible to suppress easy tod produce when pasting, when stripping
The breakage of double-sided adhesive sheet.
Hereinafter, for the supporter of double-sided adhesive sheet, the adhesive phase that constitute one embodiment of the present invention, (the 1st and the 2nd is viscous
Mixture layer) and the details of release liner illustrate.
＜ supporters ＞
Supporter possessed by the double-sided adhesive sheet of the present invention includes polylactic acid, and its thickness is 1.5 μm or less.
The polyethylene terephthalate (PET) of composition resin as the supporter used in common bonding sheet,
Resins for universal use such as polyurethane itself are difficult to be utilized common manufacturing process and are shaped to 1.5 μm or less such lower thickness.
In addition, even if obtaining 1.5 μm of thickness or less using resins for universal use such as PET, polyurethane by special manufacturing process
Supporter, the improvement effect of bonding force will not be shown by using the supporter.
On the other hand, below therefore, it is possible to be configured to 1.5 μm including the supporter of polylactic acid is due to self-supporting height
Lower thickness.
In addition, the inventors of the present invention have found, the two sides of the supporter comprising polylactic acid is provided with the double-sided adhesive of adhesive phase
The bonding force improvement effect for closing piece is very high, in particular, can show high adhesion film is made, is based on the discovery
And complete the double-sided adhesive sheet of the present invention.
In particular, the supporter comprising polylactic acid turns to 1.5 μm of thickness hereinafter, its self-supporting is high even if film, tool
There is appropriate flexibility.
Therefore, for being provided with the double-sided adhesive sheet of adhesive phase of filming on the two sides of the supporter, it is believed that
It is when being pasted on adherend, since the tracing ability for adherend surface is excellent, even if by adhesive phase filming
Show excellent bonding force.
In addition, common by double-sided adhesive sheet of the two sides of the supporters such as PET film with adhesive phase is by supporter
It is divided into 2 adhesive phases, it is difficult to expect that the flexibility etc. by an adhesive phase makes the bonding of another adhesive phase
Power changes.
That is, the bonding force of each adhesive phase only relies upon the composition of each adhesive phase, characteristic substantially, bonded by another
The influence of the composition, characteristic of oxidant layer is minimum.
And the double-sided adhesive sheet of the present invention is since the supporter comprising polylactic acid by film turns to 1.5 μm hereinafter, therefore, example
Such as bonding that can be by the characteristics such as flexibility possessed by an adhesive phase across supporter to another adhesive phase
Power raising contributes.
As a result, it is excellent to think that even if the double-sided adhesive sheet of the present invention is shown in the case where film is made if its two sides
Different bonding force.
In addition, there is the double-sided adhesive sheet of the present invention supporter to be constituted as it, therefore, it can effectively inhibit and remove
Afterwards the phenomenon that residual adhesive.
The thickness of the supporter used in the present invention be 1.5 μm hereinafter, preferably 1.2 μm or less, be more preferably 1.0 μm with
Under, further preferably 0.8 μm or less, still more preferably be 0.6 μm or less, be particularly preferably 0.4 μm or less.
Used thickness be more than 1.5 μm the supporter of double-sided adhesive sheet of supporter itself it is harder, therefore, to being attached
The tracing ability on object surface declines, as a result, easily causing the decline of bonding force.
It should be noted that there is no limit removing the lower limiting value of the thickness of supporter from being formed to effectively inhibit
The viewpoint of double-sided adhesive sheet the phenomenon that residual adhesive and inhibit the double-sided adhesive sheet generated when the when of pasting, stripping afterwards
From the viewpoint of fracture, preferably 0.01 μm or more, more preferably 0.05 μm or more, further preferably 0.10 μm or more.
In the present invention, " polylactic acid " refers to the polymer with structural unit (1) shown in following formula (I)s, the polymerization
Object can also be with the structural unit other than structural unit (1).
[chemical formula 1]
It should be noted that structural unit (1) can come from the structural unit of Pfansteihl, can also be to come from D-
The structural unit of lactic acid.
That is, polylactic acid can be the poly (l-lactic acid) of the homopolymer as Pfansteihl, can also be the homopolymerization as D-ALPHA-Hydroxypropionic acid
The poly- D-ALPHA-Hydroxypropionic acid of object, can also be the copolymer of Pfansteihl and D-ALPHA-Hydroxypropionic acid.
In these, as polylactic acid, the preferably copolymer of Pfansteihl and D-ALPHA-Hydroxypropionic acid.
Using in the case of the copolymer of Pfansteihl and D-ALPHA-Hydroxypropionic acid, as the structure for coming from Pfansteihl in the copolymer
The molar ratio ([Pfansteihl]/[D-ALPHA-Hydroxypropionic acid]) of unit and the structural unit for coming from D-ALPHA-Hydroxypropionic acid, preferably 10/90~90/10,
More preferably 20/80~80/20, it is more preferably 30/70~70/30, is still more preferably 40/60~60/40.
By forming the copolymer that the molar ratio is above range, crystallinity can be remained to appropriateness, and can incite somebody to action
Including the supporter of the copolymer is adjusted to the hardness with appropriateness.As a result, obtained bonding sheet is pasted on adherend
When, it is excellent for the tracing ability on adherend surface, it is easy to show excellent bonding force.
As the weight average molecular weight (Mw) of polylactic acid, preferably 20,000~500,000, more preferably 50,000~400,000, further it is excellent
It is selected as 70,000~300,000.
The supporter used in one embodiment of the present invention can contain poly- breast within the scope of the effect of the invention
Resin, additive other than acid etc..
As the resin other than the polylactic acid that can include in supporter, it can be cited for example that：Poly terephthalic acid second
The polyester resins such as diol ester, polybutylene terephthalate (PBT), polyethylene naphthalate, urethane acrylate
Equal urethane based resins, polythylene resin, polypropylene-based resin, polyvinyl chloride resin, Vingon resinoid,
Polyvinyl alcohol resin, vinyl-vinyl acetate copolymer, polystyrene resins, polycarbonate resin, acrylic compounds tree
Fat, norbornene resin, cyclic olefin resins etc..
As the additive that can include in supporter, it can be cited for example that：Ultra-violet absorber, resists light stabilizer
Oxygen agent, antistatic agent, slipping agent, antiblocking agent, colorant etc..
As long as the supporter used in one embodiment of the present invention is including polylactic acid, for example, can be not only to packet
Supporter obtained from resin combination containing polylactic acid is formed, can also be will with the resin combination comprising polylactic acid
Supporter etc. obtained from the supporter lamination formed by the metal foil of resin, stationery or aluminium, copper etc. other than polylactic acid.
Wherein, from the viewpoint of manufacture 1.5 μm of supporters below of thickness, as being used in one embodiment of the present invention
Supporter, preferably by comprising polylactic acid resin combination shape and formed simple layer supporter.
In addition, above-mentioned resin combination can also contain the tree other than polylactic acid within the scope of the effect of the invention
Fat ingredient, various additives.
For the content of the polylactic acid contained by the supporter used in one embodiment of the present invention, from being made even if thin
Membranization also can fully show viewpoint and manufacture 1.5 μm of supports below of thickness of the double-sided adhesive sheet of high adhesion
From the viewpoint of body, the gross mass (100 mass %) relative to the supporter is preferably 70~100 mass %, more preferably 80
~100 mass %, further preferably 90~100 mass %, still more preferably it is 95~100 mass %.
In particular, for the copolymer of Pfansteihl and D-ALPHA-Hydroxypropionic acid contained by the supporter that is used in one embodiment of the present invention
Content for, relative to the gross mass (100 mass %) of the supporter, preferably 60~100 mass %, more preferably 70~
100 mass %, further preferably 80~100 mass %, still more preferably it is 90~100 mass %, particularly preferably 95
~100 mass %.
It, can be abundant filming from being formed as the film-strength of the supporter used in one embodiment of the present invention
From the viewpoint of ground shows the double-sided adhesive sheet of high adhesion, preferably 1~300mN, it is more preferably 3~250mN, is further
Preferably 5~200mN, still more preferably it is 10~130mN, particularly preferably 15~90mN.
The film-strength of supporter is provided with the viscous of filming if it is in above range on the two sides that the supporter is made
In the case of the double-sided adhesive sheet of mixture layer, when being pasted on adherend, appearance excellent for the tracing ability on adherend surface
Easily show excellent bonding force.
It should be noted that in the present specification, the film-strength of supporter is measured based on JIS Z1707 (1997)
Value, in particular to based on the method and the value that measures of condition described in embodiment.
The 1st adhesive phases of ＜ and the 2nd adhesive phase ＞
The double-sided adhesive sheet of the present invention is respectively provided with the 1st adhesive phase and the 2nd adhesive phase on the two sides of supporter.
As the 1st adhesive phase and the 2nd respective thickness of adhesive phase, separately preferably 0.5~3.0 μm, more
Preferably 0.7~2.0 μm, further preferably 0.8~1.8 μm, still more preferably be 0.9~1.6 μm.
The double-sided adhesive sheet of the present invention is 1.5 μm of supporters below comprising polylactic acid and thickness due to having,
It can be formed and fully show the double of high adhesion the thickness thin film of each adhesive phase is turned to 3.0 μm or less
Face bonding sheet.
In addition, the overall thickness as the 1st adhesive phase and the 2nd adhesive phase, preferably 1.0~6.0 μm, more preferably
1.4~4.0 μm, further preferably 1.6~3.6 μm, still more preferably be 1.8~3.2 μm.
The adhesive of forming material as the 1st adhesive phase and the 2nd adhesive phase, as long as even if adhesive phase is thin
Membranization also can fully show the adhesive of high adhesion, be not particularly limited, it can be cited for example that comprising a kind with
It is upper to be selected from acrylic resin, urethane based resin, rubber resin, organic silicon resin, vinyl ethers resinoid, gather
The adhesive of resin of binding property in esters resin and polyolefin resin.
Wherein, from the viewpoint of it can keep high adhesion independent of environment and fully, the resin of binding property is excellent
It is selected as the uncured type resin of ultraviolet light.
It should be noted that in the present specification, the so-called uncured type resin of ultraviolet light refers to, without can pass through purple
Outside line is irradiated and the resin of the polymerizable functional group of polymerization.
In addition, the adhesive can also contain such as crosslinking agent, tackifier, purple within the scope of the effect of the invention
The adhesives additive such as ultraviolet absorbers, antioxidant, preservative, mould inhibitor, plasticizer, antifoaming agent and Wetting-transition agent.
Wherein, from the viewpoint of it can keep high adhesion independent of environment and fully, which preferably has
There is the content of the oligomer ingredient of polymerizable functional group to lack person.
Relative to 100 mass parts of resin of binding property contained by adhesive, there is the oligomer ingredient of polymerizable functional group
Content is preferably smaller than 5 mass parts, more preferably less than 1 mass parts, is further preferably no larger than 0.01 mass parts, is still more preferably small
In 0.001 mass parts.
In addition, adhesive phase can on supporter, release liner coating adhesive and formed, but to form thickness to be easy
Thin adhesive phase can also be diluted and be made the solution of adhesive to adhesive with organic solvent.
As the organic solvent, it can be cited for example that toluene, ethyl acetate, methyl ethyl ketone etc., can also directly use bonding
Used organic solvent when the resins synthesis contained in oxidant layer.
The solid component concentration of solution as adhesive, preferably 5~60 mass %, more preferably 10~40 matter
Measure %.
For the double-sided adhesive sheet of one embodiment of the present invention, even if from adhesive phase filming to be formed is made
Also from the viewpoint of fully can showing high adhesion, preferably at least one of the 1st adhesive phase and the 2nd adhesive phase are
The layer formed by the acrylic adhesives comprising acrylic resin, more preferable 1st adhesive phase and the 2nd adhesive phase this two
Person is the layer formed by the acrylic adhesives.
It should be noted that from so that adhesive phase to be formed can be independent of environment abundant filming
From the viewpoint of keeping high adhesion, acrylic adhesives are preferably the uncured type acrylic adhesives of ultraviolet light.
That is, the acrylic resin contained by adhesive is preferably the uncured type acrylic resin of ultraviolet light.
As the acrylic adhesives used in one embodiment of the present invention, even if from adhesive phase to be formed is made
From the viewpoint of filming also fully can show high adhesion, as acrylic resin, preferably comprising to come from has
The structural unit (a1) of (methyl) alkyl acrylate of the alkyl of carbon atom number 1~20 and come from the monomer containing functional group
Structural unit (a2) acrylic copolymer (A).
In addition, the acrylic adhesives preferably contain acrylic copolymer (A) and crosslinking agent (B) simultaneously, do not damaging
In the range of evil effect of the present invention, above-mentioned adhesive additive can also be contained.
Hereinafter, the acrylic compounds of the adhesive of forming material for being suitable as the 1st adhesive phase and the 2nd adhesive phase
Acrylic copolymer contained in adhesive (A) and crosslinking agent (B) illustrate.
(acrylic copolymer (A))
There is acrylic copolymer (A) structural unit (a1) and structural unit (a2), the structural unit (a1) to come from
In (methyl) alkyl acrylate (hereinafter also referred to as " monomer (a1 ') ") of the alkyl with carbon atom number 1~20, the knot
Structure unit (a2) comes from the monomer containing functional group (hereinafter also referred to as " monomer (a2 ') ").
It should be noted that acrylic copolymer (A) can also be with structural unit (a1) and while (a2), also
With the structural unit (a3) for coming from other monomers (a3 ') other than monomer (a1 ') and (a1 ').
The copolymerization form of acrylic copolymer (A1) is not particularly limited, can be block copolymer, random copolymer,
Arbitrary copolymer in graft copolymer.
Acrylic copolymer (A) may be used alone or in combination of two or more kinds.
Wherein, acrylic copolymer (A1) is preferably the uncured type acrylic acid of ultraviolet light without polymerizable functional group
Analog copolymer.
As the carbon atom number of alkyl possessed by monomer (a1 '), preferably 1~16, more preferably 1~12, further
Preferably 4~8, still more preferably it is 4~6.
As monomer (a1 '), it can be cited for example that：(methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) third
Olefin(e) acid propyl ester, (methyl) n-butyl acrylate, (methyl) isobutyl acrylate, (methyl) tert-butyl acrylate, (methyl) propylene
Sour n-pentyl ester, (methyl) the just own ester of acrylic acid, the positive heptyl ester of (methyl) acrylic acid, (methyl) n-octyl, (methyl) propylene
Sour 2- ethylhexyls, (methyl) lauryl acrylate, (methyl) tridecyl acrylate, (methyl) stearyl acrylate etc..
These monomers (a1 ') may be used alone or in combination of two or more kinds.
In one embodiment of the present invention, as monomer (a1 '), preferably (methyl) n-butyl acrylate, (methyl) propylene
Sour 2- ethylhexyls, more preferable (methyl) n-butyl acrylate.
Relative to the entire infrastructure unit (100 moles of %) of acrylic copolymer (A), the content of structural unit (a1) is excellent
It is selected as 50~98 moles of %, more preferably 60~97 moles of %, further preferably 70~96 moles of %, is still more preferably
80~93 moles of %.
As monomer (a2 '), it can be cited for example that：Monomer containing hydroxyl, contains epoxy group at the monomer containing carboxyl
Monomer, the monomer containing amino, the monomer containing cyano, the monomer containing ketone group, the monomer etc. containing alkoxysilyl.
These monomers (a2 ') may be used alone or in combination of two or more kinds.
In one embodiment of the present invention, as monomer (a2 '), the monomer of carboxyl is preferably comprised.
As the monomer containing carboxyl, can enumerate (methyl) acrylic acid, succinic acid, maleic acid, fumaric acid, itaconic acid with
And their derivative etc., preferably (methyl) acrylic acid, succinic acid and their derivative, more preferable mono succinate (2- third
Alkene acyloxy ethyl ester) and acrylic acid 2- carboxyethyls.
Relative to the entire infrastructure unit (100 moles of %) of acrylic copolymer (A), the content of structural unit (a2) is excellent
Be selected as 2~50 moles of %, more preferably 3~40 moles of %, further preferably 4~30 moles of %, still more preferably be 7~
20 moles of %.
In one embodiment of the present invention, preferably acrylic copolymer (A), which has, comes from mono succinate (2- acryloyls
Oxygroup ethyl ester) and the structural unit (a2-1) of arbitrary substance in acrylic acid 2- carboxyethyls be used as structural unit (a2).
Relative to the total amount (100 moles of %) of structural unit (a2), structural unit (a2-1) in structural unit (a2)
Content ratio be preferably 60~100 moles of %, more preferably 70~100 moles of %, further preferably 80~100 moles of %,
Still more preferably it is 90~100 moles of %, particularly preferably 100 moles of %.
In addition, the entire infrastructure unit (100 moles of %) relative to acrylic copolymer (A), structural unit (a2-1)
Content be preferably 2~45 moles of %, more preferably 3~35 moles of %, further preferably 4~25 moles of %, further
Preferably 7~20 moles of %.
As monomer (a3 '), it can be cited for example that：(methyl) cyclohexyl acrylate, (methyl) benzyl acrylate, (methyl)
Isobornyl acrylate, (methyl) dicyclopentanyl acrylate, (methyl) acrylic acid dicyclopentenyl ester, two ring penta of (methyl) acrylic acid
Alkenyloxy group ethyl ester, imino group (methyl) acrylate etc. have (methyl) acrylate, vinyl acetate, the propylene of cyclic structure
Nitrile, styrene etc..
These monomers (a3 ') may be used alone or in combination of two or more kinds.
Relative to the entire infrastructure unit (100 mass %) of acrylic copolymer (A), the content of structural unit (a3) is excellent
It is selected as 0~20 mole of %, more preferably 0~10 mole of %, further preferably 0~5 mole of %, is still more preferably 0~1
Mole %.
As the weight average molecular weight (Mw) of acrylic copolymer (A), preferably 50,000~1,500,000, more preferably 150,000~
1300000, it is more preferably 250,000~1,100,000, is still more preferably 350,000~900,000.
As containing for acrylic copolymer (A) in the acrylic adhesives used in one embodiment of the present invention
Amount, the total amount (100 mass %) of the active ingredient relative to the acrylic adhesives are preferably 50~100 mass %, more excellent
It is selected as 60~99.99 mass %, further preferably 70~99.90 mass %, is still more preferably 80~99.00 matter
Measure %, particularly preferably 90~98 mass %.
It should be noted that the acrylic adhesives used in one embodiment of the present invention can also contain acrylic compounds
Resin of binding property other than copolymer (A).
Wherein, relative to 100 mass parts of acrylic copolymer contained in acrylic adhesives (A), acrylic compounds
The content of resin of binding property other than copolymer (A) is preferably 0~100 mass parts, is more preferably 0~60 mass parts, further
Preferably 0~30 mass parts are still more preferably 0~15 mass parts, particularly preferably 0~10 mass parts.
(crosslinking agent (B))
The acrylic adhesives used in one embodiment of the present invention preferably comprise acrylic copolymer (A) and crosslinking
Agent (B).
As crosslinking agent (B), it can be cited for example that：Isocyanates crosslinking agent, epoxies crosslinking agent, aziridine class
Crosslinking agent, metal-chelating species crosslinking agent, amine cross-linking agent, amino resins class crosslinking agent etc..
These crosslinking agents (B) may be used alone or in combination of two or more kinds.
In one embodiment of the present invention, high bonding can be fully shown from even if the adhesive phase in filming
From the viewpoint of power, as crosslinking agent (B), isocyanates crosslinking agent is preferably comprised.
For the content of the crosslinking agent (B) in the acrylic adhesives used in one embodiment of the present invention, phase
For 100 mass parts of acrylic copolymer (A), preferably 0.01~8 mass parts, more preferably 0.05~5 mass parts, into one
Step is preferably 0.1~3 mass parts.
＜ release liners ＞
The double-sided adhesive sheet of one embodiment of the present invention preferably have the 1st adhesive phase and the 2nd adhesive phase at least
The composition of release liner is further laminated on the surface of one.
It should be noted that the double-sided adhesive sheet of the present invention is due to the supporter comprising polylactic acid, for Fig. 1 (b)
Shown in double-sided adhesive sheet 2 is such constitute in the case of, can effectively inhibit can produce when removing a release liner
It is raw after stripping the phenomenon that residual adhesive.
It as used release liner, is not particularly limited, from the viewpoint of handling easiness, preferably on base material
It is coated with stripping film made of remover.Stripping film can carried out lift-off processing in the two sides of base material coating remover and obtained
The stripping film arrived can also be that coated on one side remover only in base material has carried out stripping film obtained from lift-off processing.
As release liner base material, it can be cited for example that：The paper base materials such as glassine paper, coated paper, cast-coated paper；In these paper
Laminated paper made of the thermoplastic resins such as laminated polyethylene on base material；And polyethylene terephthalate, poly- terephthaldehyde
The plastic foils such as the polyolefin film of polyester film, polypropylene, the polyethylene of sour butanediol ester, polyethylene naphthalate etc. etc.；Deng
Deng.
As remover, it can be cited for example that：Including olefine kind resin, isoprene resin, butadiene type resin etc.
The remover of the resins such as heat-resistant powder filler, chain alkyl resinoid, alkyd based resin, fluororesin, organic silicon resin.
It should be noted that using the feelings of 2 release liners 13a, 13b the double-sided adhesive sheet 2 as shown in Fig. 1 (b)
Under condition, release liner 13a, 13b can use identical release liner each other, can also use different release liners.Wherein,
It is adjusted to that the difference of the peeling force of release liner 13a and release liner 13b is different, it is preferable to use release liner (the weight that peeling force is big
Release liner) and 2 kinds of stripping materials as the small release liner of peeling force (light release liner) compared with the re-release material
Material.
In addition, in the case of being coated with remover using two sides and having carried out the release liner of lift-off processing, it is preferably regulated as
The difference of the peeling force in each face of the release liner is different.
, can be without particular limitation suitable for selection as the thickness of stripping film, usually 10~200 μm, preferably 25
~150 μm, more preferably 35~80 μm.
(manufacturing method of double-sided adhesive sheet)
The manufacturing method of the double-sided adhesive sheet of the present invention is not particularly limited.
For example, if it is the double-sided adhesive sheet 1 of Fig. 1 (a), then can make as follows：It is coated in the one side of supporter 11
Adhesive simultaneously makes it dry, and forms the 1st adhesive phase 12a, the then similarly coating bonding on the another side of supporter 11
Agent simultaneously makes it dry, and forms the 2nd adhesive phase 12b, to make double-sided adhesive sheet 1.
In addition, if it is the double-sided adhesive sheet 2 of Fig. 1 (b), then can be made according to the sequence of (ia) below~(iiia)
Make.
(ia) it is viscous to form the 1st for implementing coating adhesive on the face of lift-off processing and make it dry in release liner 13a
Mixture layer 12a is bonded supporter 11 and makes single side bonding sheet.
(iia) similarly coating adhesive is implemented on the face of lift-off processing in the release liner 13b in addition prepared, made
It is dried and forms the 2nd adhesive phase 12b.
(iiia) by shape in the surface of the supporter 11 of the single side bonding sheet made in above-mentioned (ia) and above-mentioned (iia)
At the surface of exposing of the 2nd adhesive phase 12b be bonded respectively, obtain double-sided adhesive sheet 2.
It should be noted that the manufacturing method of the double-sided adhesive sheet 2 as Fig. 1 (b), can also according to (ib) below~
(iiib) sequence makes.
(ib) coating adhesive on the face of lift-off processing is implemented in release liner 13a, makes it dry and forms the 1st and glue
Mixture layer 12a.
(iib) similarly coating adhesive is implemented on the face of lift-off processing in the release liner 13b in addition prepared, made
It is dried and forms the 2nd adhesive phase 12b.
(iiib) surface of the exposing on the surface and the 2nd adhesive phase 12b of the exposing of the 1st adhesive phase 12a respectively with
The two sides of supporter 11 is bonded, and obtains double-sided adhesive sheet 2.
In the manufacturing method of above-mentioned double-sided adhesive sheet, due to the use of supporter 11 thickness it is very thin, therefore, be
The operability of supporter 11 is improved, can use and apply piece.
In the present specification, it " applies piece " and refers to, becomes difficult the very thin of such degree to improve carrying, paste
The operability of core material, bonding sheet is used to support the core material, bonding sheet and the sheet material pasted.
It, can be this be laminated in the state on supporter 11 using piece in the manufacturing process of above-mentioned double-sided adhesive sheet
Be bonded with adhesive phase, then will apply piece remove, make another adhesive phase fit in stripping after supporter 11 surface,
To manufacture double-sided adhesive sheet.
It should be noted that adhesive is coated on supporter, on release liner when, to form thinner thickness to be easy
Adhesive phase is preferably diluted and is formed as described above the form of the solution of adhesive to adhesive with organic solvent.
As the method for coating adhesive on supporter or on release liner, it can be cited for example that spin-coating method, spray coating method,
Method well known to stick coating method, scraper for coating method, rolling method, scraper plate rubbing method, die coating method, gravure coating process etc..
The residual of solvent, low boiling point component in order to prevent, and make crosslinking (reaction) in the case where having coordinated crosslinking agent
Carry out and show adhesiveness, coating adhesive preferably on supporter or on release liner and added after foring film
Heat treatment.
As the temperature condition of heat treatment, preferably 70~150 DEG C, more preferably 80~120 DEG C.As heat treatment
Processing time, preferably 30 seconds~5 minutes, more preferably 40~180 seconds.
(physical property of double-sided adhesive sheet)
The double-sided adhesive sheet of the present invention can fully show high adhesion and residual after stripping film is made
The inhibition for the phenomenon that staying adhesive is excellent.
For the double-sided adhesive sheet of one embodiment of the present invention, as the ring in 23 DEG C, 50%RH (relative humidity)
It is pasted on stainless steel plate (SUS304 steel plates, No. 120 grindings) under border and is based on JIS Z0237 after 24 hours:2000 and survey
Fixed bonding force, preferably 1.5N/25mm or more, more preferably 2.0N/25mm or more, further preferably 2.5N/25mm with
Above, still more preferably it is 3.0N/25mm or more, particularly preferably 4.5N/25mm or more.
It should be noted that in the present specification, above-mentioned bonding force refers to being based on JIS Z0237:2000 and the value that measures,
It specifically refers to according to the method and the value that measures of condition described in the embodiment described below.
Embodiment
Various physics values shown in the record of embodiment below are the values measured as follows.
(1) weight average molecular weight (Mw)
It is the value for being measured using following device and condition and being found out by conversion by standard polystyren.
Device name：" HLC-8220GPC " (TOSOH Co., Ltd's system)
Column：By " TSKgelGMHXL ", " TSKgelGMHXL " and " TSKgel2000HXL " (being TOSOH Co., Ltd's system)
Column obtained from being linked successively
Eluting solvent：Tetrahydrofuran
Injection rate：80μl
Measuring temperature：40℃
Flow velocity：1.0mL/min
Detector：Differential refractometer
(2) thickness measurement
The thickness and overall thickness of each layer of double-sided adhesive sheet are to utilize reflective film thickness measuring instrument (Filmetrics companies
System, ProductName " F20 ") measure.
Specifically, using above-mentioned reflective film thickness measuring instrument, times of the double-sided adhesive sheet to being cut into 10mm × 100mm
The film thickness at 7 positions of meaning is measured, and is calculated other than the maximum value and minimum value in the film thickness value at 7 measured positions
The average value of the film thickness value at 5 positions, which is set as each layer of the double-sided adhesive sheet as measure object thickness or
Overall thickness.
(3) film-strength of supporter
It is determined based on JIS Z 1707 (1997).
Specifically, using creepmeter (Yama Co., Ltd.'s electricity system, RE2-33005B), by diameter 1.0mm, front end geometry radius
The semicircular needle of 0.5mm vertically penetrates the supporting body surface as measure object using 30mm/ points of speed, will be worn up to the needle
Shown maximum stress is set as film-strength (mN) during until thoroughly.It should be noted that determination condition other than the above
Based on JIS Z1707 (1997).
3 said determinations are carried out for the supporter as object, film-strength is calculated separately out, 3 average value is set
It is set to the film-strength of the supporter.
Production Example 1
(making of PLA film)
Making polylactic resin, (PURAC corporations, ProductName " PURASORB (R) PDL20 ", Pfansteihl and D-ALPHA-Hydroxypropionic acid are total to
Polymers, [Pfansteihl]/[D-ALPHA-Hydroxypropionic acid]=50/50 (molar ratio)) it is dissolved in ethyl alcohol, it is prepared for 5 mass %'s of resin point concentration
Polylactic acid ethanol solution.
Then, prepare as polyolefins film (auspicious father-in-law's Co. Ltd. system, ProductName " ZEONOR ", 50 μ of thickness using piece
M), it is coated with above-mentioned polylactic acid ethanol solution using on piece at this, is dried 2 minutes at 100 DEG C so that be given after dry
Thickness has made the polylactic acid membrane being laminated in using on piece.
It should be noted that having made the polylactic acid that thickness is 0.2 μm, 0.5 μm, 0.7 μm, 1.0 μm and 2.0 μm respectively
Film.
The details of the supporter and adhesive that are used in Examples and Comparative Examples is as shown below.
＜ supporters ＞
PLA film (0.2)：
The polylactic acid membrane (film-strength=40mN) that the thickness made in Production Example 1 is 0.2 μm.
PLA film (0.5)：
The polylactic acid membrane (film-strength=45mN) that the thickness made in Production Example 1 is 0.5 μm.
PLA film (0.7)：
The polylactic acid membrane (film-strength=97mN) that the thickness made in Production Example 1 is 0.7 μm.
PLA film (1.0)：
The polylactic acid membrane (film-strength=230mN) that the thickness made in Production Example 1 is 1.0 μm.
PLA film (2.0)：
The polylactic acid membrane (film-strength=480mN) that the thickness made in Production Example 1 is 2.0 μm.
PET film (0.5)：
Polyethylene terephthalate (PET) film (film-strength=180mN) that thickness is 0.5 μm.
PET film (6.0)：
The PET film (film-strength=2040mN) that thickness is 6.0 μm.
Polyurethane film (6.0)：
Other than thickness is changed to 6.0 μm by 2 μm, the record of Production Example 4 in [0073] section based on patent document 2
The polyurethane film (film-strength=1540mN) that the thickness of making is 6.0 μm.
＜ adhesives ＞
Adhesive (1)：
The acrylic acid that n-butyl acrylate (BA) and mono succinate (2- acryloyloxyethyl esters) (2AOE) are polymerized
Analog copolymer (BA/2AOE=90/10 (molar ratio), Mw=28 ten thousand) 100 mass parts (solid constituent mass parts) and isocyanates
Class crosslinking agent (TOSOH Co., Ltd's system, ProductName " Coronate L ") 0.45 mass parts (solid constituent mass parts) are mixed
It closes, the solution of the acrylic adhesives of 13 mass % of solid component concentration obtained from being used in combination ethyl acetate to be diluted.
Adhesive (2)：
Acrylic copolymer (the BA/AAc=96/4 that n-butyl acrylate (BA) and acrylic acid (AAc) are polymerized
(molar ratio), Mw=100 ten thousand) 100 mass parts (solid constituent mass parts), tackifying resin (Harima be melted into Co. Ltd. system, production
The name of an article " Hariester TF ") 50 mass parts (solid constituent mass parts) and isocyanates crosslinking agent (TOSOH Co., Ltd
System, ProductName " Coronate L ") 0.1 mass parts (solid constituent mass parts) are mixed, and it is used in combination ethyl acetate to dilute and obtain
The solution of the acrylic adhesives of the 13 mass % of solid component concentration arrived.
Adhesive (3)：
By n-butyl acrylate (BA), 2-EHA (2EHA), acrylic acid (AAc) and acrylic acid 4- hydroxyl fourths
Acrylic copolymer (BA/2EHA/AAc/4HBA=70/30/3/0.05 (mass ratio), the Mw=that ester (4HBA) is polymerized
44 ten thousand) 100 mass parts (solid constituent mass parts), tackifier (Arakawa Chemical Industries, Ltd.'s system, ProductName " Pensel
D125 ") 30 mass parts (solid constituent mass parts) and isocyanates crosslinking agent (TOSOH Co., Ltd's system, ProductName
" Coronate L ") 2 mass parts (solid constituent mass parts) are mixed, solid constituent obtained from being used in combination ethyl acetate to dilute
The solution of the acrylic adhesives of 13 mass % of concentration.
Examples 1 to 6, comparative example 2~5
(Lindeke Co., Ltd's system, ProductName " SP-PET381031 " are carried out re-release piece with silicon-type remover
The PET film of 38 μm of thickness obtained from lift-off processing) lift-off processing face on coating table 1 shown in type adhesive, at 100 DEG C
Lower drying 1 minute forms the 1st adhesive phase of thickness shown in table 1.
Then, the supporter of the type shown in the surface of the 1st adhesive phase of exposing fitting table 1, has obtained single side bonding
Piece.
It should be noted that as used various PLA films as supporter in the case of, in order to keep operability, with
Remaining the state using piece being laminated in PLA film makes that the surface using the PLA film of piece side and the 1st adhesive phase are not laminated
Fitting, then removal apply piece, have obtained single side bonding sheet.
In addition, in addition prepare light stripping film (Lindeke Co., Ltd's system, ProductName " SP-PET381130 ", with having
Machine silicon systems remover has carried out the PET film of 38 μm of thickness obtained from lift-off processing) lift-off processing face on coating with the 1st bonding
The adhesive of type shown in the adhesive, table 1 of used identical type when the formation of oxidant layer, it is 1 point dry at 100 DEG C
Clock forms the 2nd adhesive phase of thickness shown in table 1.
Then, the support body side surface of above-mentioned single side bonding sheet is bonded respectively with the surface of the 2nd adhesive phase,
The two-sided of the structure for being sequentially laminated with re-release piece, the 1st adhesive phase, supporter, the 2nd adhesive phase, light stripping film is made
Bonding sheet (P).
In addition, in the manufacturing process of double-sided adhesive sheet (P), in addition to above-mentioned " re-release piece " is replaced with " light stripping film
(Lindeke Co., Ltd's system, ProductName " SP-PET381130 ") " in addition, is carried out similarly operation, while also having made successively
It is laminated with the double-sided adhesive sheet (Q) of the structure of light stripping film, the 1st adhesive phase, supporter, the 2nd adhesive phase, light stripping film.
Comparative example 1
It is coated on the lift-off processing face of re-release piece (Lindeke Co., Ltd's system, ProductName " SP-PET381031 ") viscous
Mixture (1), it is 1 minute dry at 100 DEG C, form the adhesive phase of 2 μm of thickness.
Then, be laminated on the surface for the exposing for being formed by the adhesive phase light stripping film (Lindeke Co., Ltd's system,
ProductName " SP-PET381130 "), make the two-sided of the structure for being sequentially laminated with re-release piece, adhesive phase, light stripping film
Bonding sheet (P ').
In addition, in the manufacturing process of double-sided adhesive sheet (P '), in addition to above-mentioned " re-release piece " is replaced with " light stripping film
Other than (Lindeke Co., Ltd's system, ProductName " SP-PET381130 "), it is carried out similarly operation, while also having made layer successively
It is laminated with the double-sided adhesive sheet (Q) of the structure of light stripping film, the 1st adhesive phase, supporter, the 2nd adhesive phase, light stripping film.
Using the double-sided adhesive sheet (P) made in Examples and Comparative Examples or (P ') and double-sided adhesive sheet (Q), carried out with
Under evaluation.It the results are shown in table 1.
(evaluation 1) bonding force measures
For " double-sided adhesive sheet (P) or (P ') " made in Examples and Comparative Examples, light stripping film is removed, is being exposed
Adhesive phase 25 μm of surface mount thickness polyester film thickness, be cut into 25mm × 300mm, made test film.
Then, the re-release piece of the test film is removed under 23 DEG C, 50%RH (relative humidity) environment, by the viscous of exposing
The surface mount of mixture layer is quiet under identical environment in the stainless steel plate (SUS304 steel plates, No. 120 grindings) as adherend
It has set 24 hours.
Then, JIS Z0237 are based on:2000, divide under identical environment according to 180 ° of stripping methods, with tensile speed 300mm/
Determine the bonding force after 24 hours after pasting.
(evaluation 2) after stripping whether the experiment of residual adhesive
For " double-sided adhesive sheet (Q) " made in Examples and Comparative Examples, confirmation is when removing one light stripping film
It is no generate the interface of light stripping film and adhesive phase after stripping whether residual adhesive, carried out 20 times experiment, according to
Under benchmark evaluated.
A：The case where not being happened at residual adhesive after removing in 20 times confirmed.
B：In 20 times confirmed, 1 time is had occurred after stripping the case where residual adhesive.
C：In 20 times confirmed, 2 times or more are had occurred after stripping the case where residual adhesive.
[table 1]
As shown in Table 1, the double-sided adhesive sheet made in Examples 1 to 6 is not easy to occur although making adhesive phase filming
After stripping the phenomenon that residual adhesive, there is excellent bonding force.
On the other hand, the result of the double-sided adhesive sheet made in comparative example 1 is, after stripping the phenomenon that residual adhesive
Occurrence frequency is high.In addition, although the double-sided adhesive sheet made in comparative example 2~5 can inhibit the residual adhesive after stripping
The generation of phenomenon, but along with the filming of adhesive phase, compared with the double-sided adhesive sheet made in embodiment, do not obtain enough
Bonding force.
Industrial applicibility
The double-sided adhesive sheet of the present invention can fully show high adhesion in the case where film is made, and shell
The inhibition of the phenomenon that from rear residual adhesive is excellent.
Therefore, double-sided adhesive sheet of the invention is suitable for for example in portable electronic device, the optics for requiring slimming
The purposes such as the temporary bond in equipment in the engagement of 2 components at the position of narrow gaps or processing.
Claims (8)
1. a kind of double-sided adhesive sheet is respectively provided with the 1st adhesive phase and the 2nd adhesive phase on the two sides of supporter, wherein
The supporter includes polylactic acid, and the thickness of the supporter is 1.5 μm or less.
2. double-sided adhesive sheet according to claim 1, wherein the film-strength of the supporter is 1~300mN.
3. double-sided adhesive sheet according to claim 1 or 2, wherein relative to the gross mass of the supporter, the poly- breast
The content of acid is 70~100 mass %.
4. double-sided adhesive sheet described in any one of claim 1 to 3, wherein the 1st adhesive phase and the 2nd adhesive phase
At least one of be the layer formed by the acrylic adhesives comprising acrylic resin.
5. double-sided adhesive sheet according to any one of claims 1 to 4, wherein the 1st adhesive phase and the 2nd adhesive phase
Respective thickness is separately 0.5~3.0 μm.
6. double-sided adhesive sheet according to any one of claims 1 to 5, wherein viscous relative to the 1st adhesive phase and the 2nd
The ratio of the overall thickness 100 of mixture layer, the thickness of the supporter is 5.0~70.0.
7. according to double-sided adhesive sheet according to any one of claims 1 to 6, wherein folder is pasted across the double-sided adhesive sheet
The overall thickness of double-sided adhesive sheet when 2 adherends is 6.0 μm or less.
8. double-sided adhesive sheet according to any one of claims 1 to 7, in 23 DEG C, the ring of 50%RH (relative humidity)
It is pasted on stainless steel plate (SUS304 steel plates, No. 120 grindings) under border and after 24 hours, is based on JIS Z0237:2000 measure
Bonding force be 1.5N/25mm or more.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-065499 | 2016-03-29 | ||
| JP2016065499 | 2016-03-29 | ||
| PCT/JP2017/012471 WO2017170446A1 (en) | 2016-03-29 | 2017-03-27 | Double-sided pressure-sensitive adhesive sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108473829A true CN108473829A (en) | 2018-08-31 |
| CN108473829B CN108473829B (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780005806.1A Active CN108473829B (en) | 2016-03-29 | 2017-03-27 | Double-sided adhesive sheet |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6204636B1 (en) |
| KR (1) | KR20180088918A (en) |
| CN (1) | CN108473829B (en) |
| TW (1) | TWI719180B (en) |
| WO (1) | WO2017170446A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445210A (en) * | 2020-03-27 | 2021-09-28 | 现代摩比斯株式会社 | Ventilation member for vehicle lamp and method of manufacturing the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7247557B2 (en) | 2018-11-30 | 2023-03-29 | 株式会社リコー | CIRCUIT BOARD, CIRCUIT BOARD MANUFACTURING METHOD, IMAGING DEVICE |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102164993A (en) * | 2008-09-29 | 2011-08-24 | 帝人株式会社 | Polylactic acid film |
| CN103228713A (en) * | 2010-11-26 | 2013-07-31 | 日东电工株式会社 | Polylactic acid film or sheet |
| CN101802057B (en) * | 2007-09-10 | 2014-09-24 | 帝人株式会社 | Film |
| CN104263272A (en) * | 2014-09-25 | 2015-01-07 | 无锡市天聚科技有限公司 | Binding adhesive tape for vegetables and fruits |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4646508B2 (en) | 2003-10-01 | 2011-03-09 | 日東電工株式会社 | Double-sided adhesive tape or sheet and method for producing the same |
| JP5864987B2 (en) * | 2011-09-30 | 2016-02-17 | リンテック株式会社 | Double-sided adhesive sheet |
| JP6126435B2 (en) * | 2013-03-29 | 2017-05-10 | リンテック株式会社 | Adhesive sheet |
| JP6556055B2 (en) * | 2013-10-15 | 2019-08-07 | 日東電工株式会社 | Adhesive sheet |
-
2017
- 2017-03-27 JP JP2017534751A patent/JP6204636B1/en active Active
- 2017-03-27 CN CN201780005806.1A patent/CN108473829B/en active Active
- 2017-03-27 KR KR1020187021222A patent/KR20180088918A/en not_active Application Discontinuation
- 2017-03-27 WO PCT/JP2017/012471 patent/WO2017170446A1/en active Application Filing
- 2017-03-28 TW TW106110341A patent/TWI719180B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802057B (en) * | 2007-09-10 | 2014-09-24 | 帝人株式会社 | Film |
| CN102164993A (en) * | 2008-09-29 | 2011-08-24 | 帝人株式会社 | Polylactic acid film |
| CN103228713A (en) * | 2010-11-26 | 2013-07-31 | 日东电工株式会社 | Polylactic acid film or sheet |
| CN104263272A (en) * | 2014-09-25 | 2015-01-07 | 无锡市天聚科技有限公司 | Binding adhesive tape for vegetables and fruits |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445210A (en) * | 2020-03-27 | 2021-09-28 | 现代摩比斯株式会社 | Ventilation member for vehicle lamp and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6204636B1 (en) | 2017-09-27 |
| CN108473829B (en) | 2020-04-14 |
| TWI719180B (en) | 2021-02-21 |
| JPWO2017170446A1 (en) | 2018-04-05 |
| KR20180088918A (en) | 2018-08-07 |
| WO2017170446A1 (en) | 2017-10-05 |
| TW201807126A (en) | 2018-03-01 |
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