CN106471081A - Double-face adhesive tape - Google Patents
Double-face adhesive tape Download PDFInfo
- Publication number
- CN106471081A CN106471081A CN201580033613.8A CN201580033613A CN106471081A CN 106471081 A CN106471081 A CN 106471081A CN 201580033613 A CN201580033613 A CN 201580033613A CN 106471081 A CN106471081 A CN 106471081A
- Authority
- CN
- China
- Prior art keywords
- adhesive layer
- layer
- adhesive
- double
- tape
- 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.)
- Withdrawn
Links
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 122
- 239000011248 coating agent Substances 0.000 claims abstract description 85
- 238000000576 coating method Methods 0.000 claims abstract description 85
- 239000000203 mixture Substances 0.000 claims abstract description 54
- 239000002356 single layer Substances 0.000 claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 239000012790 adhesive layer Substances 0.000 claims description 154
- 230000001070 adhesive effect Effects 0.000 claims description 70
- 239000000853 adhesive Substances 0.000 claims description 68
- 238000010030 laminating Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 18
- 239000003795 chemical substances by application Substances 0.000 abstract description 8
- 125000006850 spacer group Chemical group 0.000 description 20
- 239000000178 monomer Substances 0.000 description 11
- -1 acrylic ester Chemical class 0.000 description 9
- 229920000058 polyacrylate Polymers 0.000 description 9
- 239000003431 cross linking reagent Substances 0.000 description 8
- 239000003999 initiator Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 6
- 239000012948 isocyanate Substances 0.000 description 6
- 239000003505 polymerization initiator Substances 0.000 description 6
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 5
- 206010040844 Skin exfoliation Diseases 0.000 description 5
- 238000010556 emulsion polymerization method Methods 0.000 description 5
- 230000009477 glass transition Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000010558 suspension polymerization method Methods 0.000 description 4
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 4
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- 102100026735 Coagulation factor VIII Human genes 0.000 description 2
- 101000911390 Homo sapiens Coagulation factor VIII Proteins 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- MSFGZHUJTJBYFA-UHFFFAOYSA-M sodium dichloroisocyanurate Chemical compound [Na+].ClN1C(=O)[N-]C(=O)N(Cl)C1=O MSFGZHUJTJBYFA-UHFFFAOYSA-M 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FVQMJJQUGGVLEP-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2-ethylhexaneperoxoate Chemical compound CCCCC(CC)C(=O)OOOC(C)(C)C FVQMJJQUGGVLEP-UHFFFAOYSA-N 0.000 description 1
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 1
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
- STMDPCBYJCIZOD-UHFFFAOYSA-N 2-(2,4-dinitroanilino)-4-methylpentanoic acid Chemical compound CC(C)CC(C(O)=O)NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O STMDPCBYJCIZOD-UHFFFAOYSA-N 0.000 description 1
- GYHZLNKMZPYTFB-UHFFFAOYSA-N 2-(oxiran-2-yl)acetamide Chemical compound NC(=O)CC1CO1 GYHZLNKMZPYTFB-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 description 1
- GWZMWHWAWHPNHN-UHFFFAOYSA-N 2-hydroxypropyl prop-2-enoate Chemical compound CC(O)COC(=O)C=C GWZMWHWAWHPNHN-UHFFFAOYSA-N 0.000 description 1
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 1
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical class 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 244000126211 Hericium coralloides Species 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 1
- QORUGOXNWQUALA-UHFFFAOYSA-N N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 Chemical compound N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 QORUGOXNWQUALA-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 150000001541 aziridines Chemical class 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229940065472 octyl acrylate Drugs 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
-
- 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
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Form the reservoir 5 of adhesion agent composition A in the upstream in this gap 4 of the apparatus for coating possessing the gap 4 allowing base material film 10 to pass through, base material film 10 is allowed to pass through gap 4, thus adhesion agent composition A to be coated the one side of base material film 10, manufacture the monolayer adhesion coating band 32 with adhesion coating 31a.In this case, it is pre-configured with the gap 4 allowing base material film 10 to pass through and be arranged side by side the striped of multiple slits 21 and be coated with film 20, its striped is made to be coated with the narrowest part of the slit 21 of film 20 across gap 4, base material film 10 is allowed to pass through gap 4, thus being coated with adhesion agent composition A on base material film 10, multiple row striated ground forms adhesion coating 31a multiple row striated.Next, manufacturing double-face adhesive tape 30A using the monolayer adhesion coating band 32 being achieved in that.According to the method, define the double-face adhesive tape of adhesion coating with can easily manufacturing multiple row striated.
Description
Technical Field
The present invention relates to a double-sided adhesive tape.
Background
When an LCD panel or a film for an LCD panel is attached to a backlight housing of an LCD module, a removable double-sided adhesive tape is used to attach the LCD panel or the film for the LCD panel in a repairable manner in order to facilitate inspection, component exchange, and the like after assembly of the LCD module.
However, in the adhesion surface of the LCD panel or the film for the LCD panel and the backlight housing of the LCD module, the adhesion surface may be warped, and if such an adhesion surface is adhered with a conventional double-sided adhesive tape having an adhesion surface formed on the full surface, the adhesion portion is subjected to stress, and thus, distortion or wrinkle may occur.
Therefore, when the double-sided adhesive tape is used to adhere a warped adhesive surface, the double-sided adhesive tape is cut into a narrow width and then adhered in a stripe shape in a plurality of rows.
On the other hand, the following double-sided adhesive tape is proposed: in the case where a strip-shaped release agent layer is provided on one surface of a base film along the longitudinal direction of the base film and a strip-shaped release agent layer is also provided on the other surface of the base film along the longitudinal direction, the release agent layers on the front and back surfaces of the base films are arranged so as to be different from each other, and then an adhesive layer is formed on the base film provided with the release agent layer and wound up to form a roll (patent document 1). When the tape-like double-sided adhesive tape is pulled out from the roll, the adhesive layer is divided into stripes, and stripes of the release agent layer and stripes of the adhesive layer are alternately formed on both the front and back surfaces of the tape-like base material. Therefore, when the adherend has a warp on the surface to be adhered, it is conceivable to use the double-sided pressure-sensitive adhesive tape.
However, the method for producing the double-sided adhesive tape is complicated, and when the tape-like double-sided adhesive tape is drawn out from a roll, the adhesive layer may not be divided into the intended stripes.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2001-181584
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above-mentioned conventional techniques, and an object thereof is to provide a double-sided adhesive tape which has adhesive layers formed in a plurality of rows in a stripe pattern, can be easily produced, and has excellent removability.
Means for solving the problems
The present inventors have found that when a stripe coating film having a plurality of rows of slits is used to coat an adhesive composition on a base film using a coating apparatus such as a roll coater, a single-layer adhesive layer tape having an adhesive layer formed in a plurality of rows in a stripe pattern can be easily produced by a conventional coating apparatus, and a double-sided adhesive tape can be easily produced by the single-layer adhesive layer tape, and have completed the present invention.
That is, the present invention provides a method for producing a single-layer adhesive layer tape, comprising forming a reservoir for an adhesive composition upstream of a gap of a coating device through which a base film passes, and coating one surface of the base film with the adhesive composition by passing the base film through the gap, thereby forming an adhesive layer, wherein a stripe-coating film having a plurality of slits arranged side by side is disposed in advance in the gap through which the base film passes, the slits of the stripe-coating film are made to cross the narrowest part of the gap, and the base film is passed through the gap, thereby coating the base film with the adhesive composition in a plurality of rows of stripes, and forming the adhesive layer in a plurality of rows of stripes.
In addition, the present invention provides a method for producing a double-sided adhesive tape, wherein a 1 st adhesive layer is formed on a 1 st base film by the above method, and a 2 nd base film is laminated on the 1 st adhesive layer, in this case, one of the 1 st base film and the 2 nd base film is a release film, and the other is a non-release film having a higher adhesive force to the adhesive layer than the release film, and the 2 nd adhesive layer is formed on the outer surface of the non-release film of the single-sided adhesive tape thus obtained.
In addition, in the present invention, as the double-sided adhesive tape manufactured by the above-described method for manufacturing a double-sided adhesive tape, there is provided: the adhesive sheet has a 1 st adhesive layer formed in a plurality of lines in a stripe pattern on one surface of a non-release film, a 2 nd adhesive layer on the other surface of the non-release film, and a release film laminated on the 1 st adhesive layer.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the double-sided pressure-sensitive adhesive tape of the present invention, since at least one of the pressure-sensitive adhesive layers on both sides of the base film is formed in a plurality of rows of stripes, even when adherends with warped attachment surfaces are attached, the stress on the attachment surfaces can be relaxed in the portions of the pressure-sensitive adhesive layers without the stripes. Therefore, the adherend can be prevented from being warped or wrinkled. Further, by forming the adhesive layer in a plurality of rows in a stripe shape, air can be easily discharged from the adherend surface.
Further, by changing the width of the stripe portion of the adhesive layer, the adhesive strength between the adherend and the double-sided adhesive tape can be easily controlled, and the work efficiency of re-peeling and re-attaching the adherend can be improved.
Further, the double-sided adhesive tape of the present invention can be easily manufactured by using a conventional coating apparatus by disposing a stripe coating film having a plurality of slits arranged in parallel in a gap through which a base material film passes in the coating apparatus and causing the slits of the stripe coating film to cross the narrowest portion of the gap. Further, by replacing the stripe coating film, the stripe width of the adhesive layer can be easily changed to a desired width.
Drawings
Fig. 1A is a schematic cross-sectional view of a coating unit.
Fig. 1B is a top view of the coating unit.
FIG. 1C is an X-X side view of the coating unit.
Fig. 2 is a plan view of a film for stripe coating.
Fig. 3A is a sectional view of a manufacturing process of the double-sided adhesive tape 30A.
Fig. 3B is a sectional view of the manufacturing process of the double-sided adhesive tape 30A.
Fig. 3C is a sectional view of the manufacturing process of the double-sided adhesive tape 30A.
Fig. 3D is a sectional view of the double-sided adhesive tape 30A.
Fig. 4 is a sectional view of the double-sided adhesive tape 30A'.
Fig. 5 is a sectional view of the double-sided adhesive tape 30B.
Fig. 6 is a sectional view of the double-sided adhesive tape 30C.
Fig. 7 is a sectional view of the double-sided adhesive tape 30D.
Fig. 8 is a sectional view of the double-sided adhesive tape 30E.
Fig. 9 is a sectional view of the double-sided adhesive tape 30F.
Fig. 10 is a sectional view of the double-sided adhesive tape 30G.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or equivalent components.
1. Coating device
1-1 overview of the coating apparatus
Fig. 1A is a schematic cross-sectional view of an example of an application unit of an application device used in the method for producing a double-sided adhesive tape of the present invention, fig. 1B is a plan view thereof, and fig. 1C is an X-X side view thereof.
The coating unit 1 includes a driving roller 2 and a spacer roller 3 opposed to the driving roller 2, a reservoir 5 of an adhesive composition a is provided upstream of a gap 4 between the driving roller 2 and the spacer roller 3, a stripe coating film 20 and a base film 10 are passed through the gap 4, and the adhesive composition a supplied from the reservoir 5 is applied to the base film 10 to form an adhesive layer.
Here, the driving roller 2 is formed in a cylindrical shape made of metal, and rotates in the arrow direction to convey the base material film 10. In the figure, symbol P denotes the rotation axis of the drive roller 2.
The spacer roller 3 is made of metal, has a cylindrical shape, and may or may not rotate. When the spacer roller 3 is rotated, the scraping blade 8 is provided on the circumferential surface of the spacer roller 3, and the adhesive composition a excessively adhering to the spacer roller 3 is scraped off from the surface of the spacer roller 3. The spacer roller 3 as the application means may be a non-cylindrical spacer device instead of the spacer roller 3 as long as the gap 4 can be adjusted to a predetermined size with respect to the drive roller 2.
The size of the gap 4 (i.e., the distance between the drive roller 2 and the spacer roller 3) LGThe thickness L of the substrate film 10 is calculated from a value corresponding to the thickness of the target adhesive layer and the solid content of the applied adhesive composition AFAnd the thickness L0 of the stripe coating film 20 described later.
In the moving path of the base material film 10 moved by the driving roller 2, a baffle 6 is provided upstream of the gap 4 so that one end thereof blocks the driving roller 2, and a pair of side plates 7 extend from both side portions of the baffle 6 to block the driving roller 2 and the spacer roller 3. The area surrounded by the baffle 6, the side plate 7, the driving roller 2, and the spacer roller 3 serves as a storage section 5 for storing the adhesive composition a.
The stripe coating film 20 is attached to the back surface of the baffle 6 (outside the reservoir 5). The remaining portion of the stripe coating film 20 extends in the driving direction of the driving roller 2 along the outer surface of the driving roller 2, and the leading end of the stripe coating film 20 is located on the downstream side of the narrowest portion of the gap 4 between the driving roller 2 and the spacer roller 3.
1-2 stripe coating film
Fig. 2 is a plan view of the film 20 for stripe coating. The stripe coating film 20 is a substantially rectangular film, and one side of the rectangle is comb-toothed by covering the bottom of the reservoir 5 of the coating unit 1 so that the adhesive composition a does not adhere to the base film 10, and by providing a plurality of slits 21 extending in the moving direction of the base film 10 in parallel at the end disposed on the downstream side in the reservoir 5.
The film material constituting the stripe coating film 20 is preferably a material having hardness such as PET, PID, OPP, or the like, and the surface is preferably smooth. The stripe coating film 20 may be subjected to a mold release treatment.
The thickness L0 of the stripe coating film 20 is determined according to the target thickness of the stripe-shaped adhesive layer formed on the base film 10 and the solid content of the adhesive composition a. For example, when the target adhesive layer thickness is 30 to 70 μm, the thickness L0 of the stripe coating film 20 is preferably 25 to 200 μm, and more preferably 50 to 188 μm.
In the stripe coating film 20, the slit 21 has a long shape, but the upstream end of the slit 21 when disposed in the coating unit is preferably rounded. Thus, the comb-like projecting portions of the stripe coating film are less likely to break in the step of applying the adhesive composition.
The length L1 of the slit 21 is, as shown in fig. 1B, a length sufficient for the narrowest portion of the gap 4 between the drive roller 2 and the spacer roller 3 to pass through. In fig. 1B, the line of the narrowest portion of the gap 4 between the drive roller 2 and the spacer roller 3 overlaps the rotation axis P of the drive roller 2. Therefore, a projection line of the stripe coating film 20 onto the rotation axis P when the stripe coating film 20 is set in the coating unit is a straight line Q indicating the narrowest portion of the display gap 4. The distance L2 between the end of the stripe coating film 20 on the downstream side and the straight line Q when the stripe coating film 20 is disposed in the coating unit 1 is preferably 10 to 200 mm. This enables the adhesive composition a to be formed into stripes on the base film 10 corresponding to the width of the slits 21 of the stripe-coated film 20.
Further, it is preferable that the distance L3 between the straight line Q and the upstream end of the slit 21 is the distance between the baffle 6 and the straight line Q. If the distance L3 is too short, the supply amount of the adhesive composition a becomes insufficient and the adhesive composition a cannot be applied to the base film 10, and if the distance L3 is too long, the slit 21 is liable to be distorted.
Therefore, the length L1 of the slit is preferably 200 to 300mm as the distance from the straight line connecting the points where the pair of shutters 6 receive the drive roller 2 to the downstream end of the stripe coating film 20.
The width of the stripe portion of the adhesive composition a applied to the base film 20 varies depending on the width L4 of the slit 21. The width L4 is determined by the viscosity of the adhesive composition a, the size of the gap 4, and the like. Generally, it is preferably 20 to 30mm, and more preferably 20 to 25 mm.
The interval between the stripe portions of the adhesive composition a applied to the base film 20 varies depending on the distance L5 between the adjacent slits 21. The distance L5 is determined by the viscosity of the adhesive composition a, the size of the gap 4, and the like. Generally, it is preferably 30 to 40mm, and more preferably 35 to 40 mm.
In the case of producing a single-layer adhesive layer tape, it is preferable to increase the width L4 of the slit 21 and decrease the distance L5 between adjacent slits 21, as compared with the case of producing a double-sided adhesive tape in which adhesive layers are formed on the front and back surfaces of the base film.
2. Substrate film
As the base film 10, a release film having high releasability from an adhesive layer or a non-release film having lower releasability from an adhesive layer than the release film may be used as necessary.
As the release film, a release film obtained by subjecting a film such as OPP or a film such as PET to a release treatment with silicone or the like can be used.
As the non-peeling film, a fluorine-based film or the like which is not subjected to a peeling treatment can be used.
Thickness L of substrate film 10FPreferably 25 to 75 μm.
3. Adhesive composition and adhesive layer
3-1 adhesive composition
As the adhesive composition a, a solvent-type acrylic adhesive or the like generally used as an adhesive for an adhesive tape can be used, and for example, an adhesive composition containing an acrylic polymer and a crosslinking agent is preferable. The pressure-sensitive adhesive composition a may contain a crosslinking accelerator, a dye, a pigment, an ultraviolet absorber, a surfactant, an antioxidant, and the like, as required.
Further, as the adhesive composition a, for example, a silicone adhesive, various rubber adhesives, a polyester adhesive, or the like can be used.
In the adhesive composition a applied in a plurality of lines in a stripe pattern to the base film 10, in order to maintain the initial stripe pattern until the final form of the adhesive layer formed as the double-sided adhesive tape, it is preferable to adjust the elastic modulus of the adhesive composition a to 107dyn/cm2Hereinafter, it is preferably 105～106dyn/cm2。
3-2 acrylic acid series polymer
The acrylic polymer constituting the pressure-sensitive adhesive composition a is preferably an acrylic polymer having a high molecular weight of 50 ten thousand or more, and more preferably an acrylic polymer having a weight average molecular weight of 70 to 150 ten thousand. If the molecular weight is increased to an insufficient level, removability is deteriorated, and if the molecular weight is increased to an excessive level, workability in coating is deteriorated. After the adhesive composition is applied in a stripe pattern, the acrylic polymer is crosslinked by UV irradiation, heating, or the like.
The weight average molecular weight can be measured by a Gel Permeation Chromatography (GPC) method. As the GPC measurement apparatus, for example, Model 510 manufactured by Waters can be used.
The glass transition temperature (Tg) of the acrylic polymer is preferably from-10 ℃ to-70 ℃ and more preferably from-20 ℃ to-50 ℃ in view of improving the adhesive properties at low temperatures.
The glass transition temperature (Tg) is a glass transition temperature (theoretical value) represented by the following formula.
1/Tg＝W1/Tg1+W2/Tg2+···Wn/Tgn
Wherein Tg represents the glass transition temperature (unit: K) of the acrylic polymer, and TgnDenotes the glass transition temperature (unit: K) of the homopolymer of the monomer n, WnRepresents the weight fraction of the monomer n.
3-3 monomers of acrylic polymers
As the monomer for forming the acrylic polymer, (meth) acrylate having 1 to 12 carbon atoms (that is, acrylate or methacrylate) can be used.
Specific examples of the (meth) acrylate having 1 to 12 carbon atoms include methyl acrylate, ethyl acrylate, butyl acrylate, 2-methyl acrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl acrylate, octyl acrylate, dodecyl methacrylate and the like, and among them, butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate and the like are preferable.
The (meth) acrylate may be copolymerized with a reactive unsaturated monomer having a double bond and at least one reactive group selected from a hydroxyl group, a carboxyl group, an amino group, and derivatives thereof in the molecule. Examples of such reactive unsaturated monomers include acrylic acid, methacrylic acid, N-methylolacrylamide, glycidyl methacrylamide, allyl glycidyl ether, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, and maleic anhydride. Methacrylic acid and 2-hydroxyethyl methacrylate are particularly preferable. More than 2 kinds of such monomers may be used in combination.
In the polymerization of the monomer, a known radical polymerization method such as solution polymerization, bulk polymerization, emulsion polymerization, or the like can be appropriately selected. As the radical polymerization initiator, azo-based initiators, peroxide-based initiators, and the like can be used. That is, in the solution polymerization, for example, 0.01 to 0.2 parts by weight of a polymerization initiator such as azobisisobutyronitrile is used, and a polymerization solvent is used to react at 50 to 70 ℃ for 8 to 30 hours under a nitrogen gas flow. In this case, it is preferable to use an organic solvent such as ethyl acetate or toluene as the polymerization solvent so that the concentration of the solution is 20 to 80% by weight. This makes it possible to increase the molecular weight of the polymer as described above.
In addition, from the viewpoint of reducing environmental load, a suspension polymerization method, an emulsion polymerization method, or the like, which does not use an organic solvent, is preferable. In the suspension polymerization method and the emulsion polymerization method, for example, a polymerization initiator, a suspending agent (emulsifier), a chain transfer agent if necessary, and the like may be appropriately blended in water together with a monomer component containing an acrylic ester as a main component to perform polymerization. More specifically, emulsion polymerization methods such as a collective polymerization method, a continuous dropping polymerization method, and a divided dropping polymerization method can be employed.
As the polymerization initiator of the suspension polymerization method, an oil-soluble azo initiator and a peroxide initiator can be used, and more specifically, an azo initiator such as 2,2 '-azoisobutyronitrile and 2, 2' -azobis-2, 4-dimethylvaleronitrile, and a peroxide initiator such as lauroyl peroxide, benzoyl peroxide, t-butyl peroxy-2-ethylhexanoate and 1, 1-di-t-butyl-peroxy-2-methylcyclohexane can be used. These initiators may be used alone in 1 kind, or 2 or more kinds may be used in combination.
In addition, as the polymerization initiator in the emulsion polymerization method, a water-soluble initiator such as potassium persulfate or hydrogen peroxide can be used.
The amount of the polymerization initiator used is not particularly limited, but is preferably 0.01 to 5% by weight, more preferably 0.5 to 2% by weight, based on the total polymerizable monomer components. If the amount of the polymerization initiator used is too large, the water resistance of the coating film is lowered, and if it is too small, the polymerization rate becomes slow, and unreacted monomers tend to remain, which is not preferable.
In addition, the reaction conditions in the suspension polymerization method and the emulsion polymerization method can be properly selected, and the temperature is, for example, 20 to 100 ℃.
3-4 crosslinking agent
The crosslinking agent includes isocyanate compounds, epoxy compounds, aldehyde compounds, amine compounds, metal salts, metal alkoxides, ammonium salts, hydrazine compounds, glycidyl compounds, aziridine compounds, metal chelates, and the like, and isocyanate compounds are preferable for improving the adhesion force to the base film 10. A single kind of isocyanate compound may be used, or 2 or more kinds may be used in combination. Further, an isocyanate compound and other crosslinking agents may be used in combination.
Specific examples of the isocyanate compound include tolylene diisocyanate, hydrogenated tolylene diisocyanate, tolylene diisocyanate adduct of trimethylolpropane, xylylene diisocyanate adduct of trimethylolpropane, triphenylmethane triisocyanate, methylene bis (4-phenylmethane) triisocyanate, isophorone diisocyanate, and the like, and ketoxime stoppers, phenol stoppers, isocyanurates, and the like thereof. Among them, tolylene diisocyanate adduct of trimethylolpropane is preferable.
The amount of the crosslinking agent such as an isocyanate compound added is preferably 0.05 to 5 parts by weight, more preferably 0.1 to 1 part by weight, based on 100 parts by weight of the acrylic resin. If the amount of the crosslinking agent added is too small, curing is insufficient, cohesive force is insufficient, removability under high temperature and high humidity is poor, and adhesion is poor. On the other hand, if the amount of the crosslinking agent added is too large, curing is excessively accelerated, and the adhesive strength is undesirably reduced.
3-5 adhesive layer
The adhesive composition a is applied to a base film in a multi-line stripe pattern, dried as necessary, and crosslinked and cured by UV irradiation or heating to form an adhesive layer in a multi-line stripe pattern. The final thickness of the adhesive layer is usually 5 to 70 μm.
4. Coating mechanism in coating unit
In the coating unit 1 shown in fig. 1A, the adhesive composition a is coated on the base film 10 in the following manner.
That is, the base material film 10 is conveyed by the driving roller 2 rotating in the direction of the arrow, and the base material film 10 passes under the stripe coating film 20 on the bottom surface of the storage part 5 storing the adhesive composition a, and then passes through the gap 4 between the driving roller 2 and the spacer roller 3. As shown in fig. 1B, the stripe coating film 20 is disposed on the bottom surface of the reservoir 5, the stripe coating film 20 extends to the downstream of the gap 4, and the slit 21 is formed in the portion that spans the narrowest portion of the gap 4, but the slit is not formed on the upstream side of the portion. Therefore, when the base film 10 passes through the bottom surface of the reservoir 5 on the upstream side of the region where the slits 21 are formed, the adhesive composition a does not adhere to the base film 10, but when the base film 10 passes through the gap 4, as shown in fig. 1C, the region of the stripe coating film 20 where the plurality of slits 21 are arranged is overlapped on the base film 10 on the peripheral surface of the driving roller 2, and the adhesive composition a passes through the slits 21 and is pressed against the base film 10 by the spacer roller 3, whereby the adhesive composition a adheres to the base film 10.
The slits 21 of the plurality of lines of the stripe-coated film 20 continue from the narrowest portion of the gap 4 to the length L2. Therefore, after the base material film 10 passes through the narrowest portion of the gap 4, the parallel arrangement region of the slits 21 of the stripe coating film 20 also overlaps the base material film 10. Thus, as shown in fig. 1B, the adhesive composition a is applied in a plurality of lines in stripes on the base film 10 corresponding to the positions of the slits 21 of the stripe-coated film 20.
Then, the adhesive composition a applied in a stripe pattern to the base film 10 is dried, whereby a single-layer adhesive layer tape in which a plurality of adhesive layers are formed in a stripe pattern on the base film 10 can be produced. Here, when the adhesive composition a contains a crosslinking agent, the crosslinking can be performed by UV irradiation, heating, or the like at the time of drying or after drying.
On the other hand, if the region of the stripe-coated film 20 in which the slits 21 are arranged side by side is present at and upstream of the narrowest portion of the gap 4 and is not present downstream of the narrowest portion of the gap 4, the adhesive composition a cannot be coated in a stripe shape but is coated in a planar shape.
The coating unit for coating the adhesive composition a in a stripe pattern on the base film 10 in a plurality of rows using the stripe coating film 20 is not limited to the coating unit shown in fig. 1A. The adhesive composition may be applied in a plurality of lines in a stripe pattern on the base film by attaching the stripe coating film to a gap through which the base film passes and the adhesive composition is attached in a coating unit such as a roll coater such as a known reverse coater, comma coater, or gravure coater, or a slit coater, or a die coater, so that the slit of the stripe coating film spans the gap.
5. Double-sided adhesive tape and method for producing same
Fig. 3D is an example of a cross-sectional view of a double-sided adhesive tape manufactured by using the coating unit 1. The double-sided adhesive tape 30A has a 1 st adhesive layer 31a formed in a plurality of lines in a stripe pattern on one surface of the non-release film 12, a 2 nd adhesive layer 31b formed in a plurality of lines in a stripe pattern on the other surface of the non-release film 12, and release films 11a and 11b are laminated on the adhesive layers 31a and 31b, respectively.
Here, the 1 st adhesive layer 31a and the 2 nd adhesive layer 31b are formed of the same adhesive composition, and the 1 st adhesive layer31a has a width L of a stripe portionaWidth L of stripe portion with 2 nd adhesive layer 31bbAre equal. This makes the adhesive force of the front and back adhesive surfaces of the double-sided adhesive tape 30A equal.
The stripe portions of the 1 st adhesive layer 31a and the stripe portions of the 2 nd adhesive layer 31b are alternately formed at positions not overlapping each other with the non-release film 12 interposed therebetween. This enables the double-sided adhesive tape 30A to be wound uniformly when wound in a roll shape.
The double-sided adhesive tape 30A can be manufactured as follows.
First, the 1 st release film 11a is used as the base film 10 used in the coating unit 1, and the adhesive composition is coated in a stripe pattern in a plurality of rows on the 1 st release film by the above-described method, thereby producing the single-layer adhesive layer tape 32 in which the 1 st adhesive layer 31a is formed in a plurality of rows on the 1 st release film 11a, as shown in fig. 3A. In this case, as the stripe coating film 20 used in the coating unit 1, the width L4 of the slit 21 and the distance L5 from the adjacent slit 21 are made equal.
The single-layer adhesive tape 32 may be wound and stored, and may be used as a single-layer adhesive tape itself, but is used as an intermediate material for producing a double-sided adhesive tape in the present invention.
Next, the non-release film 12 is laminated on the adhesive layer 31a of the single-layer adhesive tape 32 as shown in fig. 3B, and the single-layer adhesive tape 33 in which the 1 st adhesive layer 31a is sandwiched between the 1 st release film 11a and the non-release film 12 is manufactured.
Further, as the base film 10 used in the coating unit 1, a single-layer adhesive-layer tape in which adhesive layers are formed in a multi-line stripe pattern on the non-release film 12 may be produced by coating the adhesive composition a in a multi-line stripe pattern on the non-release film 12 using the non-release film 12, and the 1 st release film 11a may be laminated on the adhesive layer of the single-layer adhesive tape to produce a single-layer adhesive-layer tape 33 shown in fig. 3B.
On the other hand, as shown in fig. 3C, in the same manner as in the case of manufacturing the single-layer adhesive layer tape 32 described above, the 2 nd adhesive layer 31b is formed in a comb-tooth shape in a plurality of rows on the 2 nd release film 11b to manufacture the 2 nd single-layer adhesive layer tape 32 b. Then, the non-release film 12 of the previously manufactured single-layer adhesive tape 33 and the 2 nd adhesive layer 31b of the 2 nd single-layer adhesive tape 32b are opposed to each other, and these single-layer adhesive tapes 33, 32b are laminated. In this case, the positions of the single-layer adhesive tapes 33 and 32b are adjusted so that the 1 st adhesive layer 31a and the 2 nd adhesive layer 31b are alternately arranged without overlapping each other with the non-release film 12 interposed therebetween. This makes it possible to obtain the double-sided adhesive tape 30A shown in fig. 3D.
As another method for manufacturing the double-sided adhesive tape 30A, the following method may be used: the slit 21 of the stripe coating film 20 used for forming the 2 nd single-layer adhesive layer tape 32b was previously positioned so that the slits 21 were arranged at a half pitch with respect to the 1 st adhesive layer 31a of the 1 st single-layer adhesive layer tape 32, and the 2 nd single-layer adhesive layer tape 32b thus obtained and the single-layer adhesive layer tape 33 in which the non-release film 12 was laminated were laminated so that the 2 nd adhesive layer 31b of the 2 nd single-layer adhesive layer tape 32b faced the non-release film 12.
As another method for producing the double-sided adhesive tape, a single-layer adhesive layer tape 33 in which the 1 st adhesive layer 31a is sandwiched between the 1 st release film 11a and the non-release film 12 is used as the base film 10 in the coating unit 1, whereby the double-sided adhesive tape 30A' shown in fig. 4 can be produced. In this double-sided adhesive tape 30A', the 2 nd adhesive layer 31b is formed in a plurality of rows in a stripe pattern on the non-release film 12 of the single-layer adhesive layer tape 33, but the release film is not laminated on the 2 nd adhesive layer 31b, and therefore, the tape is wound up for storage. Alternatively, a release film may be laminated on the 2 nd adhesive layer 31b to form a double-sided adhesive tape having the same layer configuration as that of fig. 3D.
6. Deformation form of double-sided adhesive tape
In the method for producing a double-sided adhesive tape of the present invention, by appropriately changing the width L4 of the slit 21 and the distance L5 (fig. 2) between the adjacent slits 21 in the stripe-coating film 20 used in the coating unit, and by changing the slit width of the stripe-coating film used for forming the 1 st adhesive layer, the slit width of the stripe-coating film used for forming the 2 nd adhesive layer, and the like, the form of the adhesive tape can be diversified, and the removability can be finely adjusted, and therefore, double-sided adhesive tapes of various forms corresponding to various adherends can be produced.
For example, as in the double-sided adhesive tape 30B shown in fig. 5, the slit portions 34a between the adjacent stripe portions of the 1 st adhesive layer 31a and the slit portions 34B between the adjacent stripe portions of the 2 nd adhesive layer 31B may overlap each other with the non-release film 12 interposed therebetween.
The double-sided adhesive tape 30B can be obtained by using a stripe-coated film 20 in which the distance L5 between adjacent slits 21 is greater than the width L4 of the slits 21 as the stripe-coated film 20 in the above-described method for producing the double-sided adhesive tape 30A.
According to the double-sided adhesive tape 30B, the adhesive layer is partially formed as compared with the double-sided adhesive tape 30A described above, and therefore, a double-sided adhesive tape with improved removability can be obtained.
As in the double-sided adhesive tape 30C shown in fig. 6, the stripe portions of the 1 st adhesive layer 31a and the stripe portions of the 2 nd adhesive layer 31b may be overlapped with each other with the non-release film 12 interposed therebetween.
The double-sided adhesive tape 30C can be produced by making the width L4 of the slit 21 larger than the distance L5 of the adjacent slit 21 as the stripe coating film 20 in the above-described method for producing the double-sided adhesive tape 30A.
According to the double-sided adhesive tape 30C, a double-sided adhesive tape having improved adhesiveness as compared with the double-sided adhesive tape 30A described above can be obtained.
As in the double-sided adhesive tape 30D shown in fig. 7, the stripe portions of the 1 st adhesive layer 31a and the stripe portions of the 2 nd adhesive layer 31b may overlap each other with the non-release film 12 interposed therebetween, and the slit portions 34a of the 1 st adhesive layer 31a and the slit portions 34b of the 2 nd adhesive layer 31b may overlap each other differently with the non-release film 12 interposed therebetween.
The double-sided adhesive tape 30D can be obtained by superposing the striped portions of the two adhesive layers when the non-release film 12 of the single-layer adhesive layer tape 33 and the separately manufactured single-layer adhesive tape 32b are laminated in the above-described method for manufacturing the double-sided adhesive tape 30A.
According to the double-sided adhesive tape 30D, the region where neither the 1 st adhesive layer 31a nor the 2 nd adhesive layer 31b is formed at the longitudinal edge of the double-sided adhesive tape 30D or the narrow double-sided adhesive tape from the time when the double-sided adhesive tape 30D is manufactured or from the time when the narrow double-sided adhesive tape is formed by cutting the slit portions 34a and 34b of the double-sided adhesive tape 30D in the direction in which the slit portions 34a and 34b extend. Therefore, when the double-sided adhesive tape 30D or the double-sided adhesive tape cut into narrow pieces is stored in a high-temperature environment, blocking is less likely to occur even if the adhesive layers 31a and 31b are deformed.
As with the double-sided adhesive tape 30E shown in fig. 8, the double-sided adhesive tape 30A may be formed by enlarging the width of the stripe portion of the 2 nd adhesive layer 31b with respect to the width of the stripe portion of the 1 st adhesive layer 31a, and similarly, as with the adhesive tape 30F shown in fig. 9, the double-sided adhesive tape 30D may be formed by enlarging the width of the stripe portion of the 2 nd adhesive layer 31b with respect to the width of the stripe portion of the 1 st adhesive layer 31 a. By thus widening the width of the stripe portion of the 2 nd adhesive layer 31b as compared with the width of the stripe portion of the 1 st adhesive layer 31a, the adhesive strength on the 2 nd adhesive layer 31b side can be improved as compared with the adhesive strength on the 1 st adhesive layer 31a side of the double-sided adhesive tapes 30E and 30F.
Further, as in the adhesive tape 30G shown in fig. 10, one of the front and back adhesive layers (in the figure, the 2 nd adhesive layer 31b) of the double-sided adhesive tape may be formed on the entire surface. This makes it possible to further increase the adhesive strength of the adhesive surface having the adhesive layer formed thereon over the entire surface thereof, as compared with the adhesive strength of the other adhesive surface.
In the double-sided adhesive tape shown in fig. 5B 30G to 10G 30B ', the release film provided on the double-sided adhesive tape may be a single layer, as in the double-sided adhesive tape shown in fig. 4 a'.
Examples
The present invention will be described in detail below with reference to examples.
Examples 1 to 3 and comparative example 1
As shown in table 1, double-sided adhesive tapes having cross sections shown in fig. 3D, 5, and 6 were produced as examples 1 to 3 through the steps shown in fig. 3A to 3C. In comparative example 1, a double-sided adhesive tape was produced in which adhesive layers were formed on both sides of a base film (non-release film) and release films were laminated on the adhesive layers, respectively.
In this case, the width L of the stripe portion of the 1 st adhesive layeraAnd the width L of the slit between the stripe parts of the 1 st adhesive layersaAnd the width L of the stripe-shaped part of the 2 nd adhesive layerbAnd the width L of the slit between the stripe parts of the 2 nd adhesive layersbAs shown in Table 1, the thickness of each adhesive layer was 30 μm.
Further, the compositions of the adhesive compositions forming the 1 st adhesive layer and the 2 nd adhesive layer are both as follows.
Polymer/Clearon P105/Coronate HX
＝100/30/2
Wherein,
2EHA/BA/VAc/AAc/HEMA
＝32/32/20/7/1
Clearon P105: hydrogenated terpene resin manufactured by Anyuan chemical Co., Ltd
Coronate HX: polyisocyanate available from Tosoh corporation
In the formula, 2 EHA: 2-ethylhexyl acrylate
BA: acrylic acid butyl ester
VAc: vinyl acetate (VAA)
AAc: acrylic acid
HEMA: hydroxy ethyl methacrylate
PET having a thickness of 25 μm was used as the base film (non-release film 12), and PET having a thickness of 38 μm was used as the release films 11a and 11 b.
Evaluation of
The double-sided adhesive tapes of the examples and comparative examples were evaluated for (a) adhesiveness, (b) reworkability, (c) uniformity of thickness, and (d) presence or absence of distortion as follows. The results are shown in table 1.
(a) Adhesive property
The ease of attachment when the LCD panel and the backlight housing were attached by the double-sided adhesive tape was evaluated in the following criteria.
O: good air discharge performance, no bending or wrinkling
And (delta): poor air discharge, but no occurrence of bending or wrinkling
X: poor air discharge, bending and wrinkling
(b) Reworkability
The transfer of the adhesive was evaluated by the following criteria when the LCD panel and the backlight housing were bonded with the double-sided adhesive tape and then peeled off.
O: no paste residue
And (delta): some part of the paste remained
X: paste remains on the whole surface
(c) Uniformity of thickness
The uniformity of thickness of the double-sided adhesive tape itself was evaluated by the following criteria.
Very good: uniform thickness
O: uneven thickness but no problem in practical use
X: uneven thickness and practical obstacles
(d) Whether or not skew occurs
The LCD panel and the backlight housing were visually observed for the presence or absence of distortion after they were attached to each other with the double-sided adhesive tape, and evaluated according to the following criteria.
Very good: without skew
O: can be used although slightly askew
And (delta): can be used although slightly askew
X: have skew and cannot be used
[ Table 1]
As is clear from table 1, by forming the adhesive layer on the front and back surfaces of the base film in a plurality of rows of stripes and shifting the stripe portions from the front and back surfaces of the base film, (i) air is easily discharged when the adherend is bonded, and bonding is easy, (ii) stress when the substance with warped surface to be bonded is bonded can be relaxed in the void portion of the adhesive layer, and therefore, even the substance with warped surface to be bonded can be bonded with a predetermined adhesive force, and (iii) re-peeling after temporary bonding is easy.
In addition, in example 2 in which the stripe portions of the adhesive layers on both sides of the base film were not overlapped with each other, the air release property and the reworkability were particularly excellent. Further, example 3, in which stripe portions of the adhesive layers on both sides of the base film were overlapped with each other, was excellent in adhesion.
Description of the symbols
1 coating unit
2 drive roller
3 spacer roll
4 gap
5 storage part
6 baffle
7 side plate
8 scraping knife
10 base material film
11a 1 st Release film
11b No. 2 Release film
12 non-peeling film
20 stripe coating film
21 slit
30A, 30A', 30B, 30C, 30D, 30E, 30F, 30G double-sided adhesive tape
31a 1 st adhesive layer
31b 2 nd adhesive layer
32 Single-layer adhesive layer tape
32b No. 2 Single-layer adhesive layer tape
33 Single-layer adhesive layer tape
34a slit portion of the 1 st adhesive layer
34b slit part of 2 nd adhesive layer
Adhesive composition A
Thickness of L0 stripe-coated film
Length of L1 slit
The distance between the downstream end of the slit L2 and a straight line Q representing the narrowest part of the gap 4
The distance between the upstream end of the slit L3 and a straight line Q representing the narrowest part of the gap 4
Width of L4 slit
L5 distance between adjacent slits
La1 st adhesive layer stripe portion width
LbWidth of stripe portion of No. 2 adhesive layer
LFThickness of substrate film
LGThe size of the gap 4 (distance between the drive roller and the spacer roller)
Rotating shaft of P driving roller
Q represents the line of the narrowest part of the gap.
Claims (13)
1. A method for producing a single-layer adhesive layer tape, comprising forming a reservoir for an adhesive composition upstream of a gap provided with a coating device through which a base film passes, and applying the adhesive composition to one surface of the base film by passing the base film through the gap, wherein a stripe-coating film having a plurality of slits arranged side by side is arranged in advance in the gap through which the base film passes, and the adhesive composition is applied in a plurality of rows of stripes on the base film by passing the base film through the gap so that the slits of the stripe-coating film straddle the narrowest portion of the gap, and the adhesive layer is formed in a plurality of rows of stripes.
2. A method for producing a single-layer adhesive tape, comprising forming a 1 st adhesive layer on a 1 st base film by the method according to claim 1 and laminating a 2 nd base film on the 1 st adhesive layer, wherein one of the 1 st base film and the 2 nd base film is a release film, and the other is a non-release film having a higher adhesive force of the adhesive layer than the release film.
3. A method for producing a double-sided adhesive tape, comprising forming a 2 nd adhesive layer on the outer surface of a non-release film of a single-layer adhesive layer tape formed by the method according to claim 2.
4. The method for producing a double-sided adhesive tape according to claim 3, wherein the 1 st single-layer adhesive tape is produced by the method according to claim 2, and the 2 nd single-layer adhesive tape having the 2 nd adhesive layer formed in a plurality of rows in a stripe pattern on a release film is produced by using the release film as a base film in the method according to claim 1, and the 1 st single-layer adhesive tape and the 2 nd single-layer adhesive tape are laminated with a non-release film of the 1 st single-layer adhesive tape facing the 2 nd adhesive layer of the 2 nd single-layer adhesive tape.
5. The method for producing a double-sided adhesive tape according to claim 4, wherein the 1 st single-layer adhesive layer tape and the 2 nd single-layer adhesive layer tape are laminated so that the stripe portion of the 1 st adhesive layer formed in the 1 st single-layer adhesive layer tape and the stripe portion of the 2 nd adhesive layer formed in the 2 nd single-layer adhesive layer tape do not overlap with each other.
6. The method for producing a double-sided adhesive tape according to claim 4, wherein the 1 st single-layer adhesive layer tape and the 2 nd single-layer adhesive layer tape are laminated so that a striped portion of the 1 st adhesive layer formed on the 1 st single-layer adhesive layer tape and a striped portion of the 2 nd adhesive layer formed on the 2 nd single-layer adhesive layer tape overlap each other.
7. A double-sided adhesive tape has a 1 st adhesive layer formed in a plurality of rows in a stripe pattern on one surface of a non-release film, a 2 nd adhesive layer on the other surface of the non-release film, and a release film laminated on the 1 st adhesive layer.
8. The double-sided adhesive tape according to claim 7, wherein the 2 nd adhesive layer is formed in full coating.
9. The double-sided adhesive tape according to claim 7, wherein the 2 nd adhesive layer is formed in a plurality of rows in a stripe pattern.
10. The double-sided adhesive tape according to claim 9, wherein the stripe portions of the 1 st adhesive layer and the stripe portions of the 2 nd adhesive layer are formed at positions not overlapping each other with the non-release film interposed therebetween.
11. The double-sided adhesive tape according to claim 9, wherein the stripe-shaped portion of the 1 st adhesive layer and the stripe-shaped portion of the 2 nd adhesive layer are formed at positions overlapping each other with the non-release film interposed therebetween.
12. The double-sided adhesive tape according to claim 11, wherein the slit portion between the adjacent stripe portions of the 1 st adhesive layer and the slit portion between the adjacent stripe portions of the 2 nd adhesive layer are formed at positions overlapping each other with the base film interposed therebetween.
13. The double-sided adhesive tape according to any one of claims 9 to 12, wherein the stripe width of the 1 st adhesive layer is different from the stripe width of the 2 nd adhesive layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014142768A JP6330535B2 (en) | 2014-07-10 | 2014-07-10 | Double-sided adhesive tape |
| JP2014-142768 | 2014-07-10 | ||
| PCT/JP2015/069751 WO2016006652A1 (en) | 2014-07-10 | 2015-07-09 | Double-sided adhesive tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106471081A true CN106471081A (en) | 2017-03-01 |
Family
ID=55064280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580033613.8A Withdrawn CN106471081A (en) | 2014-07-10 | 2015-07-09 | Double-face adhesive tape |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6330535B2 (en) |
| KR (1) | KR20170032231A (en) |
| CN (1) | CN106471081A (en) |
| TW (1) | TW201619318A (en) |
| WO (1) | WO2016006652A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0363557U (en) * | 1989-10-18 | 1991-06-20 | ||
| JPH05320591A (en) * | 1992-05-15 | 1993-12-03 | Nishi Shoji Kk | Deformed double side-adhesive tape and its production |
| JP2012017396A (en) * | 2010-07-07 | 2012-01-26 | Kurabe Industrial Co Ltd | Double-sided adhesive tape with release sheet, and method for pasting by the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504767Y1 (en) * | 1967-12-26 | 1975-02-08 | ||
| JPS5937343U (en) * | 1982-09-01 | 1984-03-09 | 株式会社星光商会 | adhesive film |
| JP2000351945A (en) * | 1999-06-09 | 2000-12-19 | Seiwa Electric Mfg Co Ltd | Electroconductive adhesive tape |
| JP4736154B2 (en) | 1999-12-27 | 2011-07-27 | 大日本印刷株式会社 | Double-sided adhesive tape |
| JP2008150431A (en) * | 2006-12-14 | 2008-07-03 | Lintec Corp | Adhesive sheet and method for producing adhesive sheet |
| JP2012122027A (en) * | 2010-12-10 | 2012-06-28 | Nitto Denko Corp | Pressure-sensitive adhesive tape or sheet |
-
2014
- 2014-07-10 JP JP2014142768A patent/JP6330535B2/en active Active
-
2015
- 2015-07-09 WO PCT/JP2015/069751 patent/WO2016006652A1/en active Application Filing
- 2015-07-09 KR KR1020167035324A patent/KR20170032231A/en unknown
- 2015-07-09 CN CN201580033613.8A patent/CN106471081A/en not_active Withdrawn
- 2015-07-13 TW TW104122518A patent/TW201619318A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0363557U (en) * | 1989-10-18 | 1991-06-20 | ||
| JPH05320591A (en) * | 1992-05-15 | 1993-12-03 | Nishi Shoji Kk | Deformed double side-adhesive tape and its production |
| JP2012017396A (en) * | 2010-07-07 | 2012-01-26 | Kurabe Industrial Co Ltd | Double-sided adhesive tape with release sheet, and method for pasting by the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016017167A (en) | 2016-02-01 |
| JP6330535B2 (en) | 2018-05-30 |
| KR20170032231A (en) | 2017-03-22 |
| WO2016006652A1 (en) | 2016-01-14 |
| TW201619318A (en) | 2016-06-01 |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170301 |
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| WW01 | Invention patent application withdrawn after publication |