CN104093804A

CN104093804A - Adhesive tape

Info

Publication number: CN104093804A
Application number: CN201380007921.4A
Authority: CN
Inventors: 铃木俊隆; 石黑繁树; 由藤拓三; 千田洋毅; 松本真理; 关口裕香; 长友绫; 浅井文辉; 杉村敏正; 白井稚人
Original assignee: Nitto Denko Corp
Current assignee: Nitto Denko Corp
Priority date: 2012-02-27
Filing date: 2013-02-27
Publication date: 2014-10-08
Also published as: TW201343861A; WO2013129462A1; JP2013173876A

Abstract

The purpose of the present invention is to provide an adhesive tape capable of obtaining stable adhesion and detachment properties in a variety of environments, and minimizing fouling of that to which the tape is adhered. An adhesive tape in which a pressure-sensitive-adhesive layer is formed on one surface of a thermoplastic-resin film, wherein the thermoplastic-resin film and/or the pressure-sensitive-adhesive layer contain(s) a methylenebis fatty acid amide and a fatty acid, and do(es) not substantially contain a fatty acid monoamide as a byproduct formed when producing the methylenebis fatty acid amide.

Description

Self adhesive tape

Technical field

The present invention relates to self adhesive tape.

Background technology

All the time, as the substrate layer of the self adhesive tape of the removable in semiconductor fabrication process etc., use PVC film etc.Self adhesive tape is the coated on one side binder layer of the substrate layer that forms at the PVC film by such etc. and forming, in base material or tackiness agent, add fatty acid amide (Japanese kokai publication sho 57-139163 communique), and fatty acid amide is moderately oozed out at tackiness agent face, control thus uncoiling, cementability to adherend.

In addition, the means (Japanese kokai publication hei 07-276516 communique) of good separability and stain resistance have been proposed to obtain by add urea compounds and hydrotalcite in vinyl chloride-based resin.

But present situation is that its adhesion characteristic is unstable, in addition, large to the pollution of the adherends such as semiconductor crystal wafer when release adhesive band.Particularly from adherend when release adhesive band, the preservation state according to the keeping state of self adhesive tape, after being fitted on adherend etc., produce sometimes and are difficult to peel off or on adherend, remain such undesirable conditions such as pollutent such as tackiness agent.

Summary of the invention

the problem that invention will solve

The present invention makes in view of the above problems, and its object is to provide and under various environment, can both obtains stable adhesion properties and peel property and can will be limited in minimum self adhesive tape to the pollution of adherend.

for the scheme of dealing with problems

Adhesion characteristic and the peel property to existing removable self adhesive tape such as the inventor conducts in-depth research, result is found out, in the methylene-bis fatty acid amide containing as additive, there is in a large number the starting material when synthetic, the impurity of by product in the substrate layer of self adhesive tape or binder layer, in addition, in its commercially available product, the amount of impurity has very large deviation in each batch.Therefore, can make adhesion properties stable by removing the impurity of methylene-bis fatty acid amide and add in the substrate layer or binder layer of self adhesive tape, being surprised to find that, and the pollution to adherend significantly reduce in the time peeling off.

In addition, study in detail for the each composition that becomes the impurity for methylene-bis fatty acid amide, result new discovery, the lipid acid producing in the time generating methylene-bis fatty acid amide can effectively suppress self adhesive tape fit in bonding force after adherend through time rise.

Its result, by specially making to have removed the lipid acid that contains specified amount in the methylene-bis fatty acid amide of impurity, completed self adhesive tape of the present invention, described self adhesive tape can under various environment, realize the preservation of self adhesive tape with the balance that the laminating of adherend is preserved, obtain stable adhesion properties and peel property.

That is, self adhesive tape of the present invention is the self adhesive tape that is formed with pressure-sensitive adhesive layer at thermoplastic resin membrane's one side,

Wherein, at least in any one of thermoplastic resin membrane and pressure-sensitive adhesive layer, contain methylene-bis fatty acid amide and lipid acid, and in fact containing the lipid acid monoamide of the by product when generating methylene-bis fatty acid amide.

Such self adhesive tape preferably possesses following more than a kind.

Methylene-bis fatty acid amide is to utilize solvent extraction to remove as the lipid acid monoamide of aforementioned auxiliary product to obtain.

Methylene-bis fatty acid amide is the represented compound of formula (I).

R ¹-Am-CH ₂-Am-R ² (I)

(in formula, R ¹and R ²saturated or the unsaturated alkyl that represents independently of one another carbon number 6～23, Am represents secondary amide base.)

With respect to methylene-bis fatty acid amide 100 weight parts, contain lipid acid with the scope of 0.1～30 weight part.

With respect to thermoplastic resin 100 weight parts, contain methylene-bis fatty acid amide and lipid acid with the scope of 0.1～5.0 weight part respectively.

Thermoplastic resin membrane serve as reasons contain softening agent soft PVC form film.

Pressure-sensitive adhesive layer comprises acrylic polymers as base polymer.

Pressure-sensitive adhesive layer side at self adhesive tape disposes release liner.

the effect of invention

According to self adhesive tape of the present invention, under various environment, can both obtain stable adhesion properties and peel property and the pollution to adherend can be limited in to minimum.

Embodiment

(self adhesive tape)

Self adhesive tape of the present invention is mainly formed with the pressure-sensitive adhesive layer of the one side that is layered in this thermoplastic resin membrane by the thermoplastic resin membrane as substrate layer.In any one of these thermoplastic resin membranes and pressure-sensitive adhesive layer, contain methylene-bis fatty acid amide and lipid acid.In addition, fatty acids monoamide not in fact in these layers.It should be noted that, methylene-bis fatty acid amide and lipid acid can only be included in thermoplastic resin membrane or pressure-sensitive adhesive layer, also can be that any one is included in pressure-sensitive adhesive layer and another one is included in thermoplastic resin membrane, also can be that any one is included in pressure-sensitive adhesive layer and another one is included in pressure-sensitive adhesive layer and thermoplastic resin membrane, also can be that any one is included in thermoplastic resin membrane and another one is included in pressure-sensitive adhesive layer and thermoplastic resin membrane, also can be included in thermoplastic resin membrane and pressure-sensitive adhesive layer.

As described later, when thermoplastic resin membrane and/or pressure-sensitive adhesive layer are stepped construction, be included in wherein in one deck, but be preferably at least included in that thermoplastic resin membrane and pressure-sensitive adhesive layer contact with each other layer in.

Self adhesive tape of the present invention as required, suitablely contacts and disposes release liner with pressure-sensitive adhesive layer.

(methylene-bis fatty acid amide)

Methylene-bis fatty acid amide in the present invention for example can represent with formula (I).

R ¹-Am-CH ₂-Am-R ² (I)

As the represented compound of formula (I), can list formula (II) or the represented compound of formula (III).

(in formula, R ¹and R ²represent independently of one another the saturated or unsaturated alkyl of carbon number 6～23.)

Can contain separately or combine two or more and contain this methylene-bis fatty acid amide.More specifically, the represented compound of formula (II) and formula (III) can be a kind respectively, also can be mixture of more than two kinds, can be also the mixture of the represented compound of the represented compound of formula (II) and formula (III).In addition, in formula (I)～formula (III), R ¹and R ²can be different, but be preferably identical.

Wherein, the represented compound of preferred formula (II).

And then, as the represented compound of formula (II), the more preferably represented compound of formula (IV).

CH ₃-(CH ₂) _n-CO-NH-CH ₂-NH-CO-(CH ₂) _m-CH ₃ (IV)

(in formula, n and m represent 5～22 integer independently of one another.)

As saturated or unsaturated alkyl, also comprise any number of in straight chain, side chain, ring-type and these combination herein.

As saturated hydrocarbyl, can list: the chain-like alkyls such as methyl, ethyl, propyl group, sec.-propyl, normal-butyl, sec-butyl, the tertiary butyl, amyl group, hexyl, heptyl, octyl group, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl;

The branched-chain alkyls such as ethylhexyl, ethyl octyl group, propyl group hexyl;

The cyclic alkyls such as cyclopentyl, cyclohexyl, suberyl etc.

As unsaturated alkyl, can list: alkenyl and the cycloalkenyl groups etc. such as propenyl, pseudoallyl, 2-propenyl, 9-octadecylene base, cyclopentenyl, cyclohexenyl.

In formula (I)～formula (III), carbon number is preferably 8～20, and more preferably 10～18.In addition, preferred stable hydrocarbon.

In formula (IV), the carbonatoms of n and m is preferably 7～19, and more preferably 9～17, more preferably 11～17 or 13～15.

Secondary amide base in formula (I) refers to the amide group of divalent, the carbon atom in amide group can with R ¹or R ²and any one bonding in methylene radical.

As the concrete compound of formula (II), can list:

N, N'-methylene-bis capric acid acidamide,

N, N'-methylene-bis lauric amide,

N, N'-methylene-bis tetradecanoic acid acid amides,

N, N'-methylene-bis palmitic amide,

N, N'-methylene-bis amine hydroxybenzene,

N, N'-methylene-bis stearic amide,

N, N'-methylene-bis behenic acid acid amides,

N, N'-methylene-bis erucicamide etc.

As the concrete compound of formula (III), can list:

N, N'-dioctyl propanedioic acid acid amides,

N, N'-dilauryl propanedioic acid acid amides,

N, N'-myristyl propanedioic acid acid amides,

N, N'-bis-palmityl propanedioic acid acid amides,

N, N'-bis-oleyl propanedioic acid acid amides,

N, N'-distearyl propanedioic acid acid amides,

N, N'-bis-mountain Yu propylmalonic acid acid amides,

N, N'-bis-erucic acid propylmalonic acid acid amides etc.

Wherein, preferably N, N'-methylene-bis stearic amide, N, N'-methylene-bis palmitic amide and their combination etc., more preferably N, N'-methylene-bis stearic amide and N, the mixture of N'-methylene-bis palmitic amide.It should be noted that, during for mixture, N, N'-methylene-bis stearic amide and N, the containing ratio of N'-methylene-bis palmitic amide is preferably with methylene-bis stearic amide: left and right, methylene-bis palmitic amide=1～10:10～1 is contained, more preferably left and right, 5～8:2～5.

Conventionally, methylene-bis fatty acid amide can generate with reacting of formaldehyde by fatty acid amide as shown below.In addition, fatty acid amide can by lipid acid, industry generates with reacting of ammonia.

2R-CO-NH ₂+HCHO→R-CO-NH-CH ₂-NH-CO-R

R-CO-NH ₂+HCHO→R-CO-NH-CH ₂OH

(in formula, R represents saturated or unsaturated alkyl)

In addition, by utilizing known synthetic method and/or condition etc., can synthesize R-NH-CO-CH ₂the methylene-bis fatty acid amide that-CO-NH-R is such.

But, in above-mentioned manufacture method, not only generate bis-fatty acid amides, also can by-product (also comprising the residual of the material that uses as raw material) mono fatty acid acid amides (sometimes also claiming lipid acid monoamide), according to creating conditions etc., the purity change of methylene-bis fatty acid amide, and cannot control closely its precision in industrial technology.In fact, if analyze the purity of methylene-bis fatty acid amide of commercially available product, as shown below, can confirm and comprise a large amount of impurity components, and deviation between each manufacture batch is also large.

Like this, can exist in theory by fatty acid amide and the methylene-bis fatty acid amide that reacting of formaldehyde obtains, purity is very high by its purifying, but in reality, as mechanicals, not have methylene-bis fatty acid amide free from foreign meter in fact.

In self adhesive tape of the present invention, contain methylene-bis fatty acid amide itself with high purity, therefore can give play to the characteristic of expectation, and can suppress less desirable effect.

Therefore the methylene-bis fatty acid amide, being obtained with reacting of formaldehyde by fatty acid amide preferably extraction (also comprising cleaning etc.) by utilizing regulation solvent etc. carries out purifying.

As solvent herein, suitable use is dissolved the mono fatty acid acid amides using as raw material but is not dissolved the solvent of methylene-bis fatty acid amide.It should be noted that, in order more to improve the purity of the methylene-bis fatty acid amide being obtained with reacting of formaldehyde by fatty acid amide, further preferred use also can be dissolved the solvent of the lipid acid using as the raw material of fatty acid amide.Herein, dissolve and refer to that for dissolving the necessary quantity of solvent of 1g solute be below 10g, do not dissolve and refer to that for dissolving the necessary quantity of solvent of 1g solute be more than 100g.

As this solvent, particularly, can list: chloroform, ethanol, methyl alcohol and their heated solvent etc.Wherein, preferably chloroform, add hot ethanol, heating methanol etc.

As extraction, can use known method arbitrarily.For example can list: the methylene-bis fatty acid amide obtaining by lipid acid monoamide and formaldehyde reaction is immersed in to method, the method that the methylene-bis fatty acid amide obtaining is used to the Soxhlet extraction of solvent etc. of in solvent, cleaning.Condition is now not particularly limited, for example, adds 30～100 times of capacity of methylene-bis fatty acid amide or the solvent of weight left and right, carry out dipping, vibration, cleaning or extraction etc. about 30 minutes～a few hours.According to the kind of solvent for use, solvent can also be heated to DEG C left and right, room temperature～100.In addition, also can change as required solvent species or utilize homogeneous solvent repeatedly to repeat such operation.Separate the insolubles obtaining by known methods such as filtrations.

After preferably extracting, insolubles is dried.The dry any means that can utilize this field conventionally to carry out.Drying conditions and temperature are not particularly limited, preferably suitably regulate.

Particularly, in the time of chloroform extraction, for example, in the commercially available about 1g of methylene-bis fatty acid amide, add chloroform 40ml, use vibrating machine vibration 1 hour, be then separated into insoluble composition and solvable composition by suction filtration.The same operation of optionally the insoluble composition of the chloroform obtaining being carried out again 2 left and right, can obtain purified methylene-bis fatty acid amide compositions thus.

In addition, in the time of extraction using alcohol, for example, in the commercially available about 1g of methylene-bis fatty acid amide, add ethanol 40ml, the heating of carrying out under 80 DEG C (hot plate temperatures) 1 hour is extracted.Then, be separated into supernatant liquor (solvable composition) and throw out (insoluble composition), optionally the insoluble composition of the ethanol obtaining carried out to 2 identical operations again, can obtain purified methylene-bis fatty acid amide compositions.

Like this, by methylene-bis fatty acid amide is carried out to solvent extraction, by-product/residual lipid acid monoamide (preferably also removing lipid acid) while generating methylene-bis fatty acid amide can be removed, the methylene-bis fatty acid amide that purity is high can be obtained.

The methylene-bis fatty acid amide using in the present invention has been removed lipid acid monoamide, in fact fatty acids monoamide not., at common analytical instrument (liquid chromatograph, high performance liquid chromatograph etc.) in, preferably, even the lipid acid monoamide that contains single kind (preferably also comprising lipid acid), its measured value is lower than 0.5 % by weight, be preferably lower than 0.4 % by weight, lower than 0.25 % by weight, lower than 0.2 % by weight, lower than 0.1 % by weight, lower than 0.05 % by weight, below detectability, even if contain multiple, its total amount is lower than 2 % by weight, be preferably lower than 1.6 % by weight, lower than 1 % by weight, lower than 0.8 % by weight, lower than 0.5 % by weight, lower than 0.4 % by weight, lower than 0.3 % by weight, lower than 0.05 % by weight, below detectability.

It should be noted that, do not refer to containing (removal) lipid acid monoamide in fact herein, the by product not only not producing when generating methylene-bis fatty acid amide, nor containing after generating, at least with the material generating as this by product lipid acid monoamide of the same race, preferably further also containing lipid acid monoamide not of the same race.

; the methylene-bis fatty acid amide using in the present invention is in fact for example, containing deriving from the lipid acid monoamide of raw material/method for making etc. or lipid acid monoamide of the same race with it/not of the same race: lauric acid monoamide, stearic acid monoamide, oleic acid monoamide, erucic acid monoamide, capric acid monoamide, palmitinic acid monoamide, tetradecanoic acid monoamide, behenic acid monoamide;

N-oleyl stearic acid monoamide, N-oleyl oleic acid monoamide, N-stearyl stearic acid monoamide, N-stearyl oleic acid monoamide, N-oleyl palmitinic acid monoamide, N-stearyl erucic acid monoamide etc., especially stearic acid monoamide, palmitinic acid monoamide etc.

In addition, the methylene-bis fatty acid amide that uses in the present invention is preferably containing the lipid acid or the lipid acid of the same race with it/not of the same race that derive from raw material etc., for example: capric acid, stearic acid, oleic acid, erucic acid, lauric acid, palmitinic acid, tetradecanoic acid, behenic acid etc., especially stearic acid, oleic acid, palmitinic acids etc., more preferably containing stearic acid, palmitinic acid etc.Or, even if contain the lipid acid that derives from raw material etc. in methylene-bis fatty acid amide, suitablely wait and measure in advance its content by analysis.This is because as described later, lipid acid is included in any one of thermoplastic resin membrane and pressure-sensitive adhesive layer with specific content.Lipid acid now can be and the lipid acid of material identical type that forms methylene-bis fatty acid amide, can be also different lipid acid, can be also these mixture of more than two kinds.That is, lipid acid is at least included in any one of thermoplastic resin membrane and pressure-sensitive adhesive layer, when the compounding of the suitable each composition in the time manufacturing thermoplastic resin membrane or pressure-sensitive adhesive layer of its total amount, controls.

It should be noted that, the methylene-bis fatty acid amide using in the present invention is described above, fatty acids monoamide (preferably in fact also not fatty acids) not in fact, but for example sometimes contain the such minor component of tripolymer as the fatty acid amide of raw material.Preferably in fact also not containing such tripolymer.

In self adhesive tape of the present invention, the addition in thermoplastic resin membrane for methylene-bis fatty acid amide and lipid acid, for example, with respect to thermoplastic resin 100 weight parts in thermoplastic resin membrane, the scope of preferably respectively doing for oneself about 0.1～5.0 weight part, more preferably 0.1～3.0 weight part left and right.

In addition, the addition in pressure-sensitive adhesive layer for methylene-bis fatty acid amide and lipid acid, for example, with respect to aftermentioned base polymer 100 weight parts, the scope of preferably respectively doing for oneself about 0.1～5.0 weight part, more preferably 0.1～3.0 weight part left and right.

Add methylene-bis fatty acid amide and lipid acid in thermoplastic resin membrane and pressure-sensitive adhesive layer time, the total amount that preferably suitably adjustment is added in the scope for 0.1～5.0 weight part left and right with respect to thermoplastic resin 100 weight parts, more preferably 0.1～3.0 weight part left and right.

In self adhesive tape of the present invention, suitable to respect to methylene-bis fatty acid amide 100 weight parts, the scope as about 0.1～30 weight part contains lipid acid, preferably contain lipid acid with the scope of 0.1～20 weight part left and right, 0.1～10 weight part left and right, 0.1～5 weight part left and right.It should be noted that, even if methylene-bis fatty acid amide and lipid acid are included in different layers, above-mentioned content is also illustrated in the total amount forming in each layer of self adhesive tape.

(thermoplastic resin membrane)

Thermoplastic resin membrane of the present invention is not particularly limited, for example, can lists the film being formed by following thermoplastic resin: the polyolefine such as Low Density Polyethylene, straight chain shaped polyethylene, medium-density polyethylene, high density polyethylene(HDPE), ultra-low density polyethylene, atactic copolymerized polypropene, block copolymerization polypropylene, homo-polypropylene, polybutene, polymethylpentene; The polyolefin-based resins such as vinyl-vinyl acetate copolymer, ionomer resin, ethene-(methyl) acrylic copolymer, ethene-(methyl) acrylate (random, alternately) multipolymer, ethylene-butene copolymer, ethene-hexene copolymer; The polyester based resins such as urethane, polyethylene terephthalate, PEN; (methyl) acrylic polymers, polystyrene, polycarbonate, polyimide, polymeric amide, polyamidoimide, polyetherimide, polysulfones, polyethersulfone, polyvinyl chloride, polyvinylidene dichloride, fluoro-resin, celluosic resin and their cross-linking agent etc.Several uses of blend as required of these thermoplastic resins.Wherein, preferred vinyl chloride-based resin film.

Vinyl chloride-based resin comprise the graft copolymer of polyvinyl chloride, vinyl chloride copolymer, polyvinyl chloride, with the mixture of other resins.

As the comonomer in vinyl chloride copolymer, for example, can list: alpha-olefines, methyl acrylate, ethyl propenoate, methyl methacrylate, butyl methacrylate etc. (methyl) esters of acrylic acid, the vinylidene chloride etc. such as the vinyl ethers of the vinyl ester of vinyl-acetic ester and so on, ethylidene vinyl ether and so on, ethene, propylene, 1-butylene.

Especially in the time using vinyl chloride-based resin, preferably added the soft vinyl chloride-based resin of aftermentioned softening agent.

In order to make self adhesive tape therefrom demonstrate appropriate flexibility, thermoplastic resin membrane preferably comprises softening agent, and then, can also comprise as required the additives such as stablizer, pad lubrication agent, tinting material, UV light absorber, antioxidant.

Softening agent is not particularly limited, for example can list: phthalic acid ester system, (the W-700 that Dainippon Ink. & Chemicals Inc manufactures of trimellitate system, trioctyl trimellitate etc.), (the J-PLUS CO. of adipic acid ester system, LTD. the D620 manufacturing, Octyl adipate, diisononyl adipate etc.), phosphoric acid ester system (tritolyl phosphate), hexanodioic acid is ester, citrate (Tributyl O-acetylcitrate etc.), sebate, azelate, maleic acid ester, benzoic ether, polyethers is polyester, epoxy is polyester (epoxidised soybean oil, epoxidation linseed oil wet goods), polyester (the low molecular weight polycaprolactone ester being formed by carboxylic acid and glycol etc.) etc.Wherein preferably using ester is softening agent.They can be used alone or in combination of two or more kinds.

With respect to thermoplastic resin 100 weight parts, it is suitable that softening agent for example uses with the ratio of 10～60 weight parts, is preferably 10～30 weight parts.

Stablizer is not particularly limited, can lists: the one package stabilizers such as barium-zinc system, tin system, calcium-zinc system, cadmium-barium system.

As filler, can list: the mineral fillers such as calcium carbonate, silicon-dioxide, mica; The metallic stuffing such as iron, lead etc.

As tinting material, can list pigment, dyestuff etc.

Other additive also can use the known any additive in this field.

Thermoplastic resin membrane can be single thin film, can be also the duplexer (multilayer film) that material or composition are different, bring into play the film of various resin advantages.

Thermoplastic resin membrane's thickness can regulate according to the physical property of self adhesive tape that will obtain etc., for example can list 30～1000 μ m, be preferably 40～800 μ m, more preferably 50～500 μ m, be particularly preferably 60～200 μ m.

In order to improve and the adaptation of tackiness agent, the face that can be provided with binder layer side to the pros and cons of thermoplastic film, particularly upper surface is implemented usual surface treatment, and such as corona treatment, chromic acid processing, ozone exposure, fire exposure, high-voltage electric shock exposure, the processing of ionization radiation etc. utilize oxide treatment that chemistry or physical method carry out etc.

(pressure-sensitive adhesive layer)

Pressure-sensitive adhesive (being sometimes only called below " tackiness agent ") layer is formed by pressure-sensitive adhesive.As pressure-sensitive adhesive, there is no particular limitation, for example, according to the kind of the base polymer of formation tackiness agent, can list: rubber series tackiness agent, acrylic adhesives, polyamide-based tackiness agent, polysiloxane series tackiness agent, polyester are that tackiness agent, carbamate are tackiness agent etc., can from these known tackiness agents, suitably select.Wherein, acrylic adhesives is due to the various characteristics such as thermotolerance, weathering resistance excellence, and kind that consists of the monomer component of acrylic polymers selection etc. can show the characteristic of expectation, therefore can use aptly.

Acrylic adhesives is formed by the base polymer forming as main component using acrylic polymerss such as (methyl) alkyl acrylates conventionally.

As (methyl) alkyl acrylate, for example, can list: (methyl) methyl acrylate, (methyl) ethyl propenoate, (methyl) propyl acrylate, (methyl) isopropyl acrylate, (methyl) butyl acrylate, (methyl) isobutyl acrylate, (methyl) sec-butyl acrylate, (methyl) tert-butyl acrylate, (methyl) vinylformic acid pentyl ester, (methyl) Ethyl acrylate, (methyl) vinylformic acid heptyl ester, (methyl) Octyl acrylate, (methyl) ethyl acrylate, (methyl) Isooctyl acrylate monomer, (methyl) vinylformic acid ester in the ninth of the ten Heavenly Stems, (methyl) vinylformic acid ester in the different ninth of the ten Heavenly Stems, (methyl) decyl acrylate, (methyl) isodecyl acrylate, (methyl) vinylformic acid undecyl ester, (methyl) dodecylacrylate, (methyl) tridecyl acrylate, (methyl) vinylformic acid tetradecyl ester, (methyl) vinylformic acid pentadecyl ester, (methyl) vinylformic acid stearyl, (methyl) vinylformic acid nonadecyl ester, alkyl ester (the preferably alkyl ester of (methyl) vinylformic acid C1～C12 of (methyl) vinylformic acid C1～C20 such as (methyl) vinylformic acid eicosyl ester.The alkyl ester of further preferred (methyl) vinylformic acid C1～C8) etc.(methyl) alkyl acrylate can be selected one kind or two or more use.

Taking the improvement of force of cohesion, thermotolerance, bridging property etc. as object, acrylic polymers can also comprise as required to should be able to the unit of other monomer components of (methyl) alkyl acrylate copolymer.

As such monomer component, for example, can list:

The carboxyl group-containing monomers such as vinylformic acid, methacrylic acid, vinylformic acid carboxylic ethyl ester, vinylformic acid carboxylic pentyl ester, methylene-succinic acid, toxilic acid, fumaric acid, β-crotonic acid;

(methyl) vinylformic acid hydroxy butyl ester, the own ester of (methyl) vinylformic acid hydroxyl, (methyl) vinylformic acid hydroxyl monooctyl ester, (methyl) vinylformic acid hydroxyl ester in the last of the ten Heavenly stems, (methyl) vinylformic acid hydroxyl lauryl, methacrylic acid-hydroxyl monomers such as (4-methylol cyclohexyl) methyl esters;

Styrene sulfonic acid, allyl sulphonic acid, 2-(methyl) acrylamide-2-methyl propane sulfonic, (methyl) acrylamide propanesulfonic acid, (methyl) vinylformic acid sulphur propyl ester, (methyl) acryloxy naphthene sulfonic acid etc. are containing sulfonic group monomer;

Phosphorous acidic group monomer, (methyl) acrylamide, the N such as 2-hydroxyethyl acryl phosphoric acid ester, (N-replacement) acid amides such as N-dimethyl (methyl) acrylamide, N-butyl (methyl) acrylamide, N-methylol (methyl) acrylamide, N-hydroxymethyl-propane (methyl) acrylamide are monomer;

(methyl) acrylic-amino ethyl ester, (methyl) vinylformic acid-N, (methyl) acrylic-amino alkyl esters such as N-dimethylaminoethyl, the tertiary fourth amino ethyl ester of (methyl) vinylformic acid are monomer;

(methyl) vinylformic acid alcoxyl base alkyl is monomer;

The maleimides such as N-N-cyclohexylmaleimide, N-sec.-propyl maleimide, N-lauryl maleimide, N-phenylmaleimide are monomer;

The clothing health imide series monomers such as N-methyl clothing health imide, N-ethyl clothing health imide, N-butyl clothing health imide, N-octyl group clothing health imide, N-2-ethylhexyl clothing health imide, N-cyclohexyl clothing health imide, N-lauryl clothing health imide;

The succinimides such as N-(methyl) acryloyl-oxy methylene succinimide, N-(methyl) acryl-6-oxo hexa-methylene succinimide, N-(methyl) acryl-8-oxo eight methylene radical succinimides are monomer;

The ethene base system monomers such as vinyl-acetic ester, propionate, NVP, methyl ethylene pyrrolidone, vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl piperazine, vinylpyrazine, vinyl pyrrole, vinyl imidazole, second alkene base oxazole, vinyl morpholine, N-vinyl carboxylic acid amides, vinylbenzene, alpha-methyl styrene, N-caprolactam;

The cyanoacrylate such as vinyl cyanide, methacrylonitrile is monomer;

(methyl) glycidyl acrylates etc. are containing epoxy group(ing) acrylic monomer;

The glycol such as (methyl) vinylformic acid polypropylene glycol ester, (methyl) vinylformic acid methoxy ethyl diol ester, (methyl) vinylformic acid methoxyl group polypropylene glycol ester are acrylate monomer;

(methyl) tetrahydrofurfuryl acrylate, fluoro (methyl) acrylate, polysiloxane (methyl) acrylate etc. have the acrylic ester monomer of heterocycle, halogen atom, Siliciumatom etc.;

Hexylene glycol two (methyl) acrylate, (gathering) ethylene glycol bisthioglycolate (methyl) acrylate, polypropylene glycol two (methyl) acrylate, neopentyl glycol two (methyl) acrylate, tetramethylolmethane two (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, tetramethylolmethane three (methyl) acrylate, Dipentaerythritol six (methyl) acrylate, epoxy acrylate, polyester acrylate, urethane acrylate, Vinylstyrene, two (methyl) butyl acrylate, the polyfunctional monomers such as two (methyl) Ethyl acrylate,

The ethylene series monomers such as isoprene, two divinyl, iso-butylene;

The vinyl ether such as vinyl ether are monomer etc.These monomer components can use one kind or two or more.

Acrylic copolymer can be by utilizing known appropriate means polymerization to manufacture above-mentioned (methyl) alkyl acrylate and other monomers as required.

Molecular weight to acrylic copolymer etc. is not particularly limited, and can use weight-average molecular weight 100,000～2,000,000 for example, be preferably the multipolymer of 150,000～1,000,000, more preferably 300,000～1,000,000 scope.Weight-average molecular weight for example can be made as following value: for example use polystyrene as value molecular weight standard material, that utilize gel permeation chromatography (GPC) to measure.

Tackiness agent can be made energy ray-curable tackiness agent by adding energy-ray polymerizable compound or import two keys of energy-ray polymerizability etc. in base polymer.The binder layer of use energy ray-curable tackiness agent can demonstrate the sufficient bonding force with adherend before irradiation energy ray, but bonding force significantly reduces after irradiation energy ray, can easily peel off and not to adherend stress application and non-residual adhesive.It should be noted that, as energy-ray, for example, can list ultraviolet ray, electron rays etc.

As energy-ray polymerizable compound, can use the compound in molecule with more than 2 energy-ray polymerizability carbon-to-carbon double bond.As such compound, for example, can list polyfunctional acrylic ester based compound.

As polyfunctional acrylic ester based compound, for example can list: 1,4-butylidene two (methyl) acrylate, 1,5-pentanediol two (methyl) acrylate, 1,6-hexylene glycol two (methyl) acrylate, 1, (methyl) acrylate of the straight chain shape aliphatic polyols such as 9-nonanediol two (methyl) acrylate, polyoxyethylene glycol two (methyl) acrylate, polypropylene glycol two (methyl) acrylate;

Cyclohexanedimethanol two (methyl) acrylate, tristane dimethanol diacrylate etc. have (methyl) acrylate of the aliphatic polyol of alicyclic radical;

(methyl) acrylate of a chain aliphatic polyol such as trimethylolpropane tris (methyl) acrylate, tetramethylolmethane three (methyl) acrylate, tetramethylolmethane four (methyl) acrylate, their condenses (two (TriMethylolPropane(TMP)) tetraacrylate, dipentaerythritol acrylate etc.).They can be used alone or in combination of two or more kinds.

As energy-ray polymerizable compound, can also use such as urethane acrylate is that the polyfunctional acrylic esters such as oligopolymer are oligopolymer.

Urethane acrylate is that oligopolymer for example can make the oligourethane being obtained by the reaction of diisocyanate cpd and polyol compound react and obtain with (methyl) alkyl acrylate with hydroxyl.

As diisocyanate cpd, for example, can list: tolylene diisocyanate, diphenylmethanediisocyanate, hexamethylene diisocyanate, phenylene diisocyanate, dicyclohexyl methane diisocyanate, Xylene Diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate, isophorone diisocyanate etc.

As polyol compound, can list: ethylene glycol, 1,4-butyleneglycol, 1, the polyalcohols such as 6-hexylene glycol, Diethylene Glycol, TriMethylolPropane(TMP), dipropylene glycol, polyoxyethylene glycol, polypropylene glycol, tetramethylolmethane, Dipentaerythritol, glycerine, by the condensation reaction of the aromatic dicarboxylic acids such as aliphatic dibasic acid or terephthalic acid, m-phthalic acid such as aforementioned polyalcohols and hexanodioic acid, sebacic acid, nonane diacid, toxilic acid and the polyester obtaining is polyol compound;

The polyethers such as poly-ether glycol, polytrimethylene ether glycol, polytetramethylene ether diol, polyhexamethylene ether glycol are polyol compound;

The lactones such as polycaprolactone glycol, poly-propiolactone glycol, poly-valerolactone glycol are polyol compound;

By the dealcoholization of the polyvalent alcohols such as ethylene glycol, propylene glycol, butyleneglycol, pentanediol, ethohexadiol, nonanediol and carbonic acid two ethyls, carbonic acid two sub-propyl ester etc. and the polycarbonate-based polyol compound obtaining.As hydroxyl (methyl) acrylic acid alkyl ester compound, for example, can list: (methyl) 2-Hydroxy ethyl acrylate, (methyl) vinylformic acid-3-hydroxy propyl ester, (methyl) vinylformic acid-4-hydroxyl butyl ester, the own ester of (methyl) vinylformic acid-6-hydroxyl, (methyl) vinylformic acid-8-hydroxyl monooctyl ester, (methyl) vinylformic acid-10-hydroxyl ester in the last of the ten Heavenly stems, (methyl) vinylformic acid-12-hydroxyl lauryl, (methyl) vinylformic acid-(4-methylol cyclohexyl) methyl esters etc.

With respect to base polymer 100 weight parts, energy-ray polymerizable compound can be with 5～200 weight parts for example, be preferably 10～100 weight parts, more preferably the scope of 10～45 weight parts is used.

As the method that imports the two keys of energy-ray polymerizability in base polymer, for example can list following method: in preparation during as the acrylic polymers of base polymer, make to there is carboxyl, the co-polymerized monomer copolymerization of hydroxyl, amino isoreactivity functional group.Thus, can in base polymer, import the functional group that becomes reaction basic point, make to have the multi-functional monomer of energy-ray polymerizability carbon-to-carbon double bond or oligopolymer by the aforementioned functional group's bonding that becomes reaction basic point, can obtain having the base polymer of energy-ray polymerizability carbon-to-carbon double bond in side chain.

Energy ray-curable tackiness agent can also comprise Photoepolymerizationinitiater initiater as required.Photoepolymerizationinitiater initiater excites, activates and produce free radical by irradiation energy ray, promotes the efficient polymerization curing reaction of binder layer.

As Photoepolymerizationinitiater initiater, for example, can list:

The benzoin alkylether series initiators such as benzoin methylether, ethoxybenzoin, benzoin iso-propylether, bitter almond oil camphor ethyl isobutyl ether;

Benzophenone, benzoylbenzoic acid, 3, the benzophenone series initiators such as 3'-dimethyl-4-methoxy benzophenone, polyvinyl benzophenone;

Alpha-hydroxy cyclohexyl phenyl ketone, 4-(2-hydroxyl-oxethyl) phenyl (2-hydroxyl-2-propyl group) ketone, Alpha-hydroxy-α, α '-dimethyl acetophenone, methoxyacetophenone, 2,2-dimethoxy-2-phenyl methyl phenyl ketone, 2, the aromatic ketone series initiators such as 2-diethoxy acetophenone;

The aromatic series ketal series initiators such as benzyl dimethyl ketal;

Thioxanthone, CTX, 2-methyl thioxanthone, 2-ethyl thioxanthone, ITX, 2-dodecyl thioxanthone, 2, 4-bis-clopenthixal ketones, 2, 4-dimethyl thioxanthone, 2, 4-diethyl thioxanthone, 2, the thioxanthone series initiators such as 4-di-isopropyl thioxanthone, the benzil series initiators such as benzil, the bitter almond oil camphor series initiators such as bitter almond oil camphor, α-one alcohol based compound (2-methyl-2-hydroxypropiophenonepreparation etc.), aromatic sulfonyl based compound (2-naphthalic sulfonic chloride etc.), photolytic activity oxime compound (1-benzophenone-1, 1-propane diketone-2-(O-ethoxy carbonyl) oxime etc.), camphorquinone, halogenation ketone, acylphosphine oxide, acyl phosphonate etc.They can be used alone or in combination of two or more kinds.

Tackiness agent can also be following material: use the polymkeric substance with acidic-groups such as carboxyls as base polymer and add neutralizing agent and in and all or part of acidic-group in base polymer, given thus hydrophilic hydrophilic adhesive.The hydrophilic adhesive conventionally cull on adherend is few, in addition, even in the situation that producing cull, also can be by cleaning and remove simply with pure water.

The polymkeric substance with acidic-group can carry out copolymerization and obtains by above-mentioned carboxyl group-containing monomer etc. being had to the monomer of acidic-group in the time preparing base polymer.

As neutralizing agent, for example can list: secondary amine, triethylamine, trolamine, the N such as the primary amine such as mono aminoethane, monoethanolamine, diethylamine, diethanolamine, N, N'-trimethylammonium quadrol, N methyldiethanol amine, N, the tertiary amines such as N-diethyl hydroxylamine etc. show alkaline organic amino compounds.

Tackiness agent can also comprise linking agent as required.

As linking agent, for example can use: epoxy is that linking agent, isocyanate-based linking agent, melamine series linking agent, peroxidation system linking agent, metal alkoxide are that linking agent, metal-chelating system linking agent, metal-salt are that linking agent, carbodiimide are that linking agent, oxazoline are that linking agent, aziridine are that linking agent, amine are the linking agents such as linking agent, and can use aptly epoxy is linking agent, isocyanate-based linking agent etc.They can be used alone or in combination of two or more kinds.

Be linking agent as epoxy, for example can list: N, N, N', N'-four glycidyl group m-xylene diamine, diglycidylaniline, 1, two (the N of 3-, N-glycidyl aminomethyl) hexanaphthene, 1, 6-hexanediol diglycidyl ether, neopentylglycol diglycidyl ether, ethylene glycol diglycidylether, propylene glycol diglycidylether, polyethyleneglycol diglycidylether, polypropylene glycol diglycidyl ether, sorbyl alcohol polyglycidyl ether, glycerol polyglycidylether, tetramethylolmethane polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitol anhydride polyglycidyl ether, trimethylolpropane polyglycidylether, hexanodioic acid 2-glycidyl ester, o-phthalic acid diglycidyl ester, triglycidyl group-tri-(2-hydroxyethyl) isocyanuric acid ester, resorcinol diglycidyl ether, bis-phenol-S-diglycidylether, in molecule, there is the epoxy resin of more than 2 epoxy group(ing) etc.

As isocyanate-based linking agent, for example, can list: ethylene vulcabond, tetramethylene vulcabond, 1, the lower aliphatic polyisocyanates such as 6-hexamethylene diisocyanate; The aliphatic polyisocyante classes such as cyclopentylidene vulcabond, cyclohexylidene vulcabond, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate; 2,4 toluene diisocyanate, 2,6-tolylene diisocyanate, 4, the aromatic polyisocyanate classes such as 4'-diphenylmethanediisocyanate, Xylene Diisocyanate etc.

Binder layer preferably comprises softening agent.As softening agent, can list softening agent same as described above.Now, the addition of softening agent is base polymer 100 weight parts with respect to forming the thermoplastic resin of tackiness agent, and it is suitable for example using with the ratio of 10～100 weight parts, is preferably 10～80 weight parts, 10～60 weight parts more preferably.

Binder layer can also comprise the additives such as stablizer, pad lubrication agent, tinting material, UV light absorber, antioxidant, tinting material as required.These additives can list additive same as described above.

Binder layer can form above-mentioned adhesive coated by utilizing scraper for coating method, rolling method, intaglio plate coating method, mould to be coated with the appropriate means such as method, reverse coating method on base material.In addition, for example, on the suitable curtain coating operation sheet such as the film that can also implement release processing at effects on surface, form binder layer, and this binder layer is transferred on thermoplastic resin membrane.

Thickness to binder layer has no particular limits, but be preferably 5～100 μ m, more preferably 5～60 μ m, be particularly preferably 5～30 μ m.The thickness of binder layer is in above-mentioned scope time, can alleviate thermoplastic resin membrane stress, improve the stress relaxation rate of self adhesive tape.

Self adhesive tape of the present invention preferably, for example, regardless of preservation state, before and after preserving in the be all suppressed in ± 0.5N/20mm of variation value of Silicon Wafer bonding force.In addition, from other viewpoints, be preferably suppressed in initial value ± 70% with interior, be preferably 65% with interior, more preferably ± 63% with in interior mobility scale.By it is changed within the scope of this, regardless of preservation state, all can prevent that the bounding force of self adhesive tape from reducing, can be easily peel off and there is no residual to adherend of tackiness agent from adherend.Herein, preserve before and initial value refer to firm manufacture self adhesive tape after or just manufactured self adhesive tape and make release liner and binder layer side contacts after.Typically referring to after preservation when manufacturing or while making release liner and binder layer side contacts through after more than about one week time point.

This self adhesive tape can be for various uses.The protection of for example, circuit face when fixing use, the semiconductor back surface that can be used as form at optical device or by film, resin, glass, metal etc. tabular or have a wafer in various members, the semiconductor technology such as product of curved surface etc. grinds by the cutting of, semi-conductor cutting use, semiconductor package body, glass, pottery etc., these techniques etc. use in the use such as self adhesive tape of stickup (and then peeling off again).Therefore, self adhesive tape of the present invention can be made the product that is suitable for the shape of these purposes, the such as different shape such as sheet, strip and size.

Like this, self adhesive tape of the present invention by least in any one of thermoplastic resin membrane and pressure-sensitive adhesive layer, contain methylene-bis fatty acid amide and lipid acid the two, and in fact, containing the lipid acid monoamide of raw material/method for making etc. that derives from methylene-bis fatty acid amide, can eliminate unexpectedly the undesirable condition while using commercially available methylene-bis fatty acid amide.And then, by also containing lipid acid on the basis at methylene-bis fatty acid amide, the balance that can further realize the preservation of self adhesive tape and the laminating of adherend is preserved.In other words,, regardless of the state of taking care of (, even if at high temperature preserve or process), can obtain all the time sufficient bounding force.And then, even preserve (regardless of the preservation state fitting in after adherend) to be pasted on the state of the adherends such as Silicon Wafer at the temperature of 60 DEG C of left and right, also can effectively prevent will be again when adherend is peeled off bounding force rise and be difficult to peel off or the undesirable condition such as residual adhesive on adherend.

(release liner)

For binder layer being protected etc., self adhesive tape of the present invention can binder layer side contacts binder layer configure release liner.

As release liner, as long as the normally used release liner in this field, just can be not particularly limited to use.For example, can make foam, the non-woven fabrics such as the various tinsels such as paper using, rubber, aluminium foil, Copper Foil, stainless steel foil, iron foil, duralumin paper tinsel, tinfoil paper, titanium foil, goldleaf, film by various resin formation such as polyethylene, polypropylene, polyvinyl chloride, polyester, polymeric amide, polyurethane foam, vinyl foam, polyethylene, styrenic foams, weave cotton cloth, felt and film that they are formed with macromolecular material lamination etc. be as base material.Thickness to base material is not particularly limited, for example, be made as 5 μ m～5mm, and it is suitable being preferably made as 30 μ m～100 μ m left and right.

Can list joining with binder layer that the surface of side implements polysiloxane series resin, chain alkyl in such base material is that resin, fluorine resin, low molecular weight polyethylene, polypropylene, rubber series polymkeric substance, phosphoric acid ester are that the parting agents such as tensio-active agent are coated with into the known release processing in these fields such as stratiform and the liner that obtains.

In order to improve, adherend is pasted to paste operation when self adhesive tape, release liner can add the slit (so-called back joint-cutting) of one or more linearity, wavy, spination, sawtooth rag shape.

(method for making of self adhesive tape)

Self adhesive tape of the present invention can be manufactured by the following method:

By being used, the methylene-bis fatty acid amide being obtained with reacting of formaldehyde by fatty acid amide is preferably the extraction etc. of dissolving aforementioned fatty acids monoamide and forming its lipid acid and not dissolving the solvent of methylene-bis fatty acid amide, obtain purified methylene-bis fatty acid amide

In resin, add this methylene-bis fatty acid amide and lipid acid, form thermoplastic resin membrane or pressure-sensitive adhesive layer,

Stacked aforementioned thermoplastic resin film and pressure-sensitive adhesive layer.

Add resin etc. to using methylene-bis fatty acid amide as additive and form thermoplastic resin membrane or pressure-sensitive adhesive layer method, add lipid acid and the method that forms thermoplastic resin membrane or pressure-sensitive adhesive layer can be used the known method in this field.

It should be noted that the formation of such thermoplastic resin membrane or pressure-sensitive adhesive layer and stacked can carrying out successively., can form separately respectively thermoplastic resin membrane and pressure-sensitive adhesive layer according to the known method in this field.Therefore, can utilize and for example melt extrude moulding method (inflation method, T modulus method etc.), melting casting method, rolling process etc.In addition, binder layer can also form separately by aforesaid method.While forming thermoplastic resin membrane and pressure-sensitive adhesive layer so separately, can be by the known method in this field, both are stacked.

The formation of thermoplastic resin membrane or pressure-sensitive adhesive layer and stackedly also can simultaneously carry out., also can form thermoplastic resin membrane and pressure-sensitive adhesive layer in the mode of multilayered structure by coetrusion, laminating (laminating of extruding layer platen press, use caking agent etc.), heat sealing method (outside heating method, pocketed heat method etc.).

Release liner sticks on binder layer side conventionally after formation self adhesive tape, can obtain thus the self adhesive tape with release liner.

[embodiment]

(preparation of purifying methylene-bis fatty acid amide)

Prepare commercially available methylene-bis fatty acid amide (Nippon Kasei Chemical Company's system).

For this methylene-bis fatty acid amide, use HPLC to measure under the following conditions the content of each composition.The results are shown in " before the extraction: bisamide A " of table 1.

For methylene-bis fatty acid amide, remove the lipid acid of lipid acid monoamide and formation lipid acid monoamide.

Particularly, in the about 1g of methylene-bis fatty acid amide, add respectively chloroform 40ml, use vibrating machine vibration 1 hour.Afterwards, be separated into insoluble composition and solvable composition by suction filtration.Carry out again respectively 2 same operations for the insoluble composition of the chloroform obtaining, obtain highly purified methylene-bis fatty acid amide.

For the methylene-bis fatty acid amide of gained, use HPLC to analyze under the following conditions.The results are shown in " after the extraction: bisamide B " of table 1.

Methylene-bis fatty acid amide etc. utilize that being analyzed as follows of HPLC is described carries out.

First, take the about 0.5g of methylene-bis fatty acid amide, in the mixed solvent of chloroform and acetonitrile, flood approximately 1 day and vibration, use afterwards the membrane filter filtering supernatant of 0.45 μ m, use HPLC equipment (Waters, W2695/W2420) to analyze.

HPLC condition

Post: (4.6mm × 150mm, 5 μ are m) for Inertsil C8-3

Flow: 1.0ml/min

Detector: ELS

Column temperature: 40 DEG C

Injection rate: 30 μ l

Grain：30

Drift tube temperature: 50 DEG C

Air pressure: 40psi

Elutriant composition: gradient (Gradient) (min) 0 → 20 → 40

A:0.1%TFA water solution A %50 → 0 → 0

B: acetonitrile B%50 → 100 → 100

[table 1]

(making of self adhesive tape)

Prepare following raw material and mix with Henschel mixer in advance, making softening agent be immersed in resin and dry (dry up).Used Banbury mixer mixing and polyvinyl chloride (PVC) Compound, obtain the thermoplastic resin membrane of thickness 110 μ m by calendering film former.

As lubricant, use methylene-bis fatty acid amide and the lipid acid shown in table 2.Lubricant adds in the time that Banbury mixer is mixing.

Prepare tackiness agent according to following composition.

Acrylic polymers (butyl acrylate/vinyl cyanide/vinylformic acid=84/14/2) 100 weight parts

Softening agent: di (2-ethylhexyl) phthalate 20 weight parts

Linking agent: butylated melamine resins 10 weight parts

By the dilution with toluene to 20% for tackiness agent of gained, be coated on above-mentioned thermoplastic resin membrane taking dried thickness as the mode of 10 μ m upper, through the drying process of 150 DEG C, 1 minute, coil into web-like.

Then, at 50 DEG C, carry out the slaking of 24 hours, be fitted in release liner (polysiloxane is processed polyester film, MRF, 38 μ m (Mitsubishi Plastics Inc's system)) and go up and batch.

Use the self adhesive tape of gained to carry out following evaluation.

1) bonding force evaluation is preserved in the heating after Silicon Wafer laminating

The test film that is cut into width 20mm, length 100mm is sticked on Silicon Wafer, in the drying machine of 60 DEG C, preserve after one week, at room temperature place 1 hour, measure its bonding force according to following condition.

Determinator: Instron type tensile testing machine Shimadzu Seisakusho Ltd. manufactures AUTOGRAPH AG-IS

Measure atmosphere: 23 DEG C, 50%RH

Adherend: 8 inches of minute surface wafers

Laminating condition: reciprocal 1 time of 2kg roller

Condition determination: 90 ° peel off, 300mm/min

Whether qualifiedly judge: with respect to initial value in ± 0.5N/20mm as qualified.

2) the wafer surface pollution after bonding force test is evaluated (after within 60 DEG C × 1 week, preserving)

According to the rear viscosity (contaminative) to wafer face after the test of following judging criterion evaluation bonding force.

5: sticky completely without male offspring

4: may be seen indistinctly at whole face (the non-invisible degree of staring)

3: can confirm (the rear of blackout glues) even if do not stare also

2: visible white blur

1: can know rear sticky (the rubbing the degree that can produce block) that confirm white

It is qualified that more than 3 black pollution of evaluation is.

These the results are shown in table 2.

[table 2]

Stearic acid: SILVER REAGENT is more than 95%

Palmitinic acid: SILVER REAGENT is more than 95%

Stearic acid monoamide: SILVER REAGENT is more than 95%

Palmitinic acid monoamide: SILVER REAGENT is more than 95%

utilizability in industry

Processing for the surface protection that self adhesive tape of the present invention can be used as the various adherends such as electronic unit when band or sheet, cutting with or protection band or sheet etc. and extensively utilizing.

Claims

1. a self adhesive tape, it is for being formed with the self adhesive tape of pressure-sensitive adhesive layer at thermoplastic resin membrane's one side, wherein, at least in any one of thermoplastic resin membrane and pressure-sensitive adhesive layer, contain methylene-bis fatty acid amide and lipid acid, and in fact containing the lipid acid monoamide of the by product when generating methylene-bis fatty acid amide.

2. self adhesive tape according to claim 1, wherein, methylene-bis fatty acid amide is to utilize solvent extraction to remove as the lipid acid monoamide of described by product to obtain.

3. self adhesive tape according to claim 1 and 2, wherein, methylene-bis fatty acid amide is the represented compound of formula (I),

R ¹-Am-CH ₂-Am-R ² (I)

In formula (I), R ¹and R ²saturated or the unsaturated alkyl that represents independently of one another carbon number 6～23, Am represents secondary amide base.

4. according to the self adhesive tape described in any one in claim 1～3, wherein, with respect to methylene-bis fatty acid amide 100 weight parts, contain lipid acid with the scope of 0.1～30 weight part.

5. according to the self adhesive tape described in any one in claim 1～4, wherein, with respect to thermoplastic resin 100 weight parts, contain methylene-bis fatty acid amide and lipid acid with the scope of 0.1～5.0 weight part respectively.

6. according to the self adhesive tape described in any one in claim 1～5, wherein, thermoplastic resin membrane's film that the soft PVC that contains softening agent forms of serving as reasons.

7. according to the self adhesive tape described in any one in claim 1～6, wherein, pressure-sensitive adhesive layer comprises acrylic polymers as base polymer.

8. according to the self adhesive tape described in any one in claim 1～7, its pressure-sensitive adhesive layer side at self adhesive tape disposes release liner.