JP5530715B2 - Double-sided adhesive tape for waterproofing - Google Patents
Double-sided adhesive tape for waterproofing Download PDFInfo
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- JP5530715B2 JP5530715B2 JP2009285010A JP2009285010A JP5530715B2 JP 5530715 B2 JP5530715 B2 JP 5530715B2 JP 2009285010 A JP2009285010 A JP 2009285010A JP 2009285010 A JP2009285010 A JP 2009285010A JP 5530715 B2 JP5530715 B2 JP 5530715B2
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- sensitive adhesive
- pressure
- adhesive tape
- water vapor
- double
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- 239000002390 adhesive tape Substances 0.000 title claims description 28
- 238000004078 waterproofing Methods 0.000 title claims description 8
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 113
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 72
- 239000010410 layer Substances 0.000 claims description 43
- 230000005540 biological transmission Effects 0.000 claims description 35
- 229920005989 resin Polymers 0.000 claims description 31
- 239000011347 resin Substances 0.000 claims description 31
- -1 polyethylene Polymers 0.000 claims description 26
- 239000000853 adhesive Substances 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 21
- 239000012790 adhesive layer Substances 0.000 claims description 21
- 239000004698 Polyethylene Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 14
- 229920002367 Polyisobutene Polymers 0.000 claims description 13
- 239000005060 rubber Substances 0.000 claims description 13
- 239000003208 petroleum Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 230000035699 permeability Effects 0.000 description 11
- 239000006260 foam Substances 0.000 description 10
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- 230000000052 comparative effect Effects 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 8
- 239000005020 polyethylene terephthalate Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 7
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- 239000007788 liquid Substances 0.000 description 6
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- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 5
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
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- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 2
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- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
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- 230000008595 infiltration Effects 0.000 description 2
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- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
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- YYGNTYWPHWGJRM-UHFFFAOYSA-N (6E,10E,14E,18E)-2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene Chemical compound CC(C)=CCCC(C)=CCCC(C)=CCCC=C(C)CCC=C(C)CCC=C(C)C YYGNTYWPHWGJRM-UHFFFAOYSA-N 0.000 description 1
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 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
- HBKBEZURJSNABK-MWJPAGEPSA-N 2,3-dihydroxypropyl (1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical class C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(=O)OCC(O)CO HBKBEZURJSNABK-MWJPAGEPSA-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
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BHEOSNUKNHRBNM-UHFFFAOYSA-N Tetramethylsqualene Natural products CC(=C)C(C)CCC(=C)C(C)CCC(C)=CCCC=C(C)CCC(C)C(=C)CCC(C)C(C)=C BHEOSNUKNHRBNM-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000010495 camellia oil Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
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- 239000011162 core material Substances 0.000 description 1
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- 239000000839 emulsion Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000011086 glassine Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- JXTPJDDICSTXJX-UHFFFAOYSA-N n-Triacontane Natural products CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC JXTPJDDICSTXJX-UHFFFAOYSA-N 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
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- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
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- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
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- 229920000915 polyvinyl chloride Polymers 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- MSFGZHUJTJBYFA-UHFFFAOYSA-M sodium dichloroisocyanurate Chemical compound [Na+].ClN1C(=O)[N-]C(=O)N(Cl)C1=O MSFGZHUJTJBYFA-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229940032094 squalane Drugs 0.000 description 1
- 229940031439 squalene Drugs 0.000 description 1
- TUHBEKDERLKLEC-UHFFFAOYSA-N squalene Natural products CC(=CCCC(=CCCC(=CCCC=C(/C)CCC=C(/C)CC=C(C)C)C)C)C TUHBEKDERLKLEC-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
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Images
Landscapes
- Laminated Bodies (AREA)
- Sealing Material Composition (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Telephone Set Structure (AREA)
Description
本発明は、特に携帯電話やタッチパネルなどの携帯情報端末機器の内部を固定する用途に好適な防水用両面粘着テープに関する。 The present invention relates to a waterproof double-sided pressure-sensitive adhesive tape particularly suitable for use in fixing the inside of a portable information terminal device such as a mobile phone or a touch panel.
近年、多種多様の機能を持つ携帯情報端末機器が開発されており、その一つとして防水機能を有する携帯情報端末機器が要望されている。
携帯電話やタッチパネルなどの携帯情報端末においては、各種部材やモジュールの固定に両面粘着テープが使用され、携帯情報端末機器の防水機能は、前記両面粘着テープの有する防水性能に依存している。防水用両面粘着テープとしては、例えば発泡体基材と粘着剤層とを有する両面粘着テープが報告されている（例えば特許文献１）。
In recent years, portable information terminal devices having a wide variety of functions have been developed, and one of them is demanded for portable information terminal devices having a waterproof function.
In portable information terminals such as mobile phones and touch panels, double-sided adhesive tape is used for fixing various members and modules, and the waterproof function of the portable information terminal device depends on the waterproof performance of the double-sided adhesive tape. As a double-sided adhesive tape for waterproofing, for example, a double-sided adhesive tape having a foam base material and an adhesive layer has been reported (for example, Patent Document 1).
防水用両面粘着テープは、例えば携帯情報端末機器などにおいて情報表示部と筐体、カメラ周り、キーパッドといった様々な箇所の固定に使用される。
特許文献１および２に記載されている防水用両面粘着テープは、ポリオレフィン系の発泡体基材とアクリル系の粘着剤を有している。基材が発泡していることにより、基材と粘着剤が界面で強固に結合している。また発泡体基材は独立気泡構造をとっているため、両面粘着テープの一方の面が水に濡れても他方の面まで浸透することが無く、防水性を発揮している。更に発泡体基材は耐衝撃性を有するため、衝撃吸収テープとしても用いられる。
The waterproof double-sided adhesive tape is used for fixing various parts such as an information display unit and a casing, a camera periphery, and a keypad in, for example, a portable information terminal device.
The waterproof double-sided pressure-sensitive adhesive tape described in
しかしながら、発泡体基材は前述したように水は通さないが、発泡材質であるが故に水蒸気を通しやすい。さらにアクリル系の粘着剤も水蒸気を通しやすい。このような部材で構成される防水両面粘着テープは、浴室など高湿度環境下で発生する水蒸気の浸水を遮断することができない。 However, although the foam base material does not allow water to pass through as described above, it is easy to pass water vapor because it is a foam material. In addition, acrylic adhesives can easily pass water vapor. The waterproof double-sided pressure-sensitive adhesive tape composed of such a member cannot block the infiltration of water vapor generated in a high humidity environment such as a bathroom.
さらに近年の携帯情報端末機能用途において、画面の大型化に伴い、画面の外枠（いわゆる額縁）が狭い防水用両面粘着テープが要望されている。しかしながら１ｍｍ程度の非常に狭いテープ幅の場合、発泡体を使用した防水用両面粘着テープでは、水の浸透を制御する独立気泡の泡壁を幅方向に対して十分に確保できない恐れがあり、充分な防水性は達成されない。 Furthermore, in recent portable information terminal function applications, as the screen is enlarged, a waterproof double-sided adhesive tape with a narrow outer frame (so-called frame) of the screen is desired. However, in the case of a very narrow tape width of about 1 mm, the waterproof double-sided adhesive tape using a foam may not be able to secure a sufficient bubble wall of closed cells for controlling water penetration in the width direction. Water resistance is not achieved.
本発明は、上記事情に鑑みてなされたものであって、狭いテープ幅でも充分な防水性能を有し、浴室などの高湿度環境下で発生する水蒸気の浸水を遮断することができる防水用両面粘着テープを提供することを目的とする。 The present invention has been made in view of the above circumstances, and has both waterproof surfaces that have sufficient waterproof performance even in a narrow tape width and can block the infiltration of water vapor generated in a high humidity environment such as a bathroom. An object is to provide an adhesive tape.
本発明者らは上記の課題を解決するために鋭意研究を行った結果、密度と水蒸気透過率を規定した基材と粘着剤を用いることにより課題を解決できることを見出した。すなわち本発明は、下記（１）〜（４）を提供するものである。
（１）本発明の防水用両面粘着テープは、基材フィルムの両面に粘着剤層が積層された防水用両面粘着テープであって、前記基材フィルムが密度０．９２〜０．９８ｇ／ｃｍ３のポリエチレンフィルムであり、かつ基材フィルム単体の水蒸気透過率（厚み１００μｍの基材フィルムとした際の水蒸気透過率）が１０ｇ／ｍ２・ｄａｙ以下であり、前記粘着剤層の水蒸気透過率（厚み５０μｍの粘着剤層とした際の水蒸気透過率）がいずれも１０ｇ／ｍ２・ｄａｙ以下であり、前記粘着剤層の粘着剤が、ポリイソブチレン樹脂と、水添石油樹脂とを含有するゴム系粘着剤であることを特徴とする。
（２）本発明の防水用両面粘着テープは、基材フィルムと粘着剤層が、粘着剤層/基材フィルム/粘着剤層/基材フィルム/粘着剤層の順で積層された５層構造を有する防水用両面粘着テープであって、前記基材フィルムが密度０．９２〜０．９８ｇ／ｃｍ３のポリエチレンフィルムであり、かつ基材フィルム単体の水蒸気透過率（厚み１００μｍの基材フィルムとした際の水蒸気透過率）が１０ｇ／ｍ２・ｄａｙ以下であり、前記粘着剤層の水蒸気透過率（厚み５０μｍの粘着剤層とした際の水蒸気透過率）がいずれも１０ｇ／ｍ２・ｄａｙ以下であり、前記粘着剤層の粘着剤が、ポリイソブチレン樹脂と、水添石油樹脂とを含有するゴム系粘着剤であることを特徴とする。
（３）本発明の防水用両面粘着テープは、０．１〜５ｍｍの幅の額縁状に打ち抜かれていることが好ましい。
（４）本発明の防水用両面粘着テープは、携帯情報端末機器内部固定用に用いられることが好ましい。
As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the problems can be solved by using a base material and an adhesive that define the density and water vapor transmission rate. That is, the present invention provides the following (1) to ( 4 ).
(1) The waterproof double-sided pressure-sensitive adhesive tape of the present invention is a waterproof double-sided pressure-sensitive adhesive tape in which an adhesive layer is laminated on both surfaces of a base film, and the base film has a density of 0.92 to 0.98 g / cm. 3 and the water vapor permeability of the single base film (water vapor permeability when a base film having a thickness of 100 μm) is 10 g / m 2 · day or less, and the water vapor permeability of the pressure-sensitive adhesive layer (Water vapor permeability when a 50 μm thick adhesive layer is used) is 10 g / m 2 · day or less, and the adhesive of the adhesive layer contains a polyisobutylene resin and a hydrogenated petroleum resin. It is a rubber adhesive .
(2) The waterproof double-sided pressure-sensitive adhesive tape of the present invention has a five-layer structure in which a base film and an adhesive layer are laminated in the order of adhesive layer / base film / adhesive layer / base film / adhesive layer. A double-sided adhesive tape for waterproofing, wherein the base film is a polyethylene film having a density of 0.92 to 0.98 g / cm 3 , and the water vapor permeability of the base film alone (with a base film having a thickness of 100 μm) Water vapor transmission rate) is 10 g / m 2 · day or less, and the water vapor transmission rate of the pressure-sensitive adhesive layer (water vapor transmission rate when the pressure-sensitive adhesive layer has a thickness of 50 μm) is 10 g / m 2 · day. The pressure-sensitive adhesive of the pressure-sensitive adhesive layer is a rubber-based pressure-sensitive adhesive containing a polyisobutylene resin and a hydrogenated petroleum resin .
( 3 ) The waterproof double-sided pressure-sensitive adhesive tape of the present invention is preferably punched into a frame shape having a width of 0.1 to 5 mm.
( 4 ) The waterproof double-sided pressure-sensitive adhesive tape of the present invention is preferably used for internal fixation of a portable information terminal device.
本発明の防水用両面粘着テープによれば、狭いテープ幅でも充分な防水性能を有し、更に、防湿性能をも有するため、浴室などの高湿度環境下で発生する水蒸気の侵入を抑制することができる。上記防水性、防湿性は、携帯情報端末機器を構成する部材の面に対してだけでなく、積層された部材の断面に対しても発揮されるため、本発明の防水用両面粘着テープを用いた携帯情報端末機器においては、従来の防水両面粘着テープより水及び水蒸気の浸入を抑制することができる。 According to the waterproof double-sided pressure-sensitive adhesive tape of the present invention, it has sufficient waterproof performance even with a narrow tape width, and further has moisture-proof performance, so it can suppress intrusion of water vapor generated in a high humidity environment such as a bathroom. Can do. The waterproof and moisture-proof properties are exerted not only on the surface of the member constituting the portable information terminal device but also on the cross section of the laminated member. Therefore, the waterproof double-sided adhesive tape of the present invention is used. In conventional portable information terminal devices, the intrusion of water and water vapor can be suppressed more than the conventional waterproof double-sided adhesive tape.
本発明の防水用両面粘着テープは、基材フィルムの両面に粘着剤層が積層された防水用両面粘着テープであって、前記基材フィルムが密度０．９２〜０．９８ｇ／ｃｍ３のポリエチレンフィルムであり、かつ基材フィルム単体の水蒸気透過率（厚み１００μｍの基材フィルムとした際の水蒸気透過率）が１０ｇ／ｍ２・ｄａｙ以下であり、前記粘着剤層の水蒸気透過率（厚み５０μｍの粘着剤層とした際の水蒸気透過率）がいずれも１０ｇ／ｍ２・ｄａｙ以下である。 The waterproof double-sided pressure-sensitive adhesive tape of the present invention is a waterproof double-sided pressure-sensitive adhesive tape in which adhesive layers are laminated on both sides of a base film, and the base film has a density of 0.92 to 0.98 g / cm 3 . It is a film and the water vapor transmission rate of the single base film (water vapor transmission rate when a base film having a thickness of 100 μm) is 10 g / m 2 · day or less, and the water vapor transmission rate of the pressure-sensitive adhesive layer (thickness 50 μm) The water vapor permeability when using the PSA layer is 10 g / m 2 · day or less.
また本発明のもう一つの形態の防水用両面粘着テープは、基材フィルムと粘着剤層が、粘着剤層/基材フィルム/粘着剤層/基材フィルム/粘着剤層の順で積層された５層構造を有する防水用両面粘着テープであって、前記基材フィルムが密度０．９２〜０．９８ｇ／ｃｍ３のポリエチレンフィルムであり、かつ基材フィルム単体の水蒸気透過率（厚み１００μｍの基材フィルムとした際の水蒸気透過率）が１０ｇ／ｍ２・ｄａｙ以下であり、前記粘着剤層の水蒸気透過率（厚み５０μｍの粘着剤層とした際の水蒸気透過率）がいずれも１０ｇ／ｍ２・ｄａｙ以下である。 In another embodiment of the waterproof double-sided pressure-sensitive adhesive tape of the present invention, the base film and the pressure-sensitive adhesive layer are laminated in the order of pressure-sensitive adhesive layer / base film / pressure-sensitive adhesive layer / base film / pressure-sensitive adhesive layer. A waterproof double-sided pressure-sensitive adhesive tape having a five-layer structure, wherein the base film is a polyethylene film having a density of 0.92 to 0.98 g / cm 3 and a water vapor transmission rate of the base film alone (100 μm thick base) The water vapor transmission rate when the material film is used is 10 g / m 2 · day or less, and the water vapor transmission rate of the pressure-sensitive adhesive layer (water vapor transmission rate when the pressure-sensitive adhesive layer is 50 μm thick) is 10 g / m. 2 · day or less.
尚、本発明において基材フィルム単体の水蒸気透過率とは、ＪＩＳＫ７１２９で規定される水蒸気透過率を指し、粘着剤層の水蒸気透過率とは、後述する実施例で記載している通り、厚み６μｍのポリエチレンテレフタレートフィルム２枚に挟持された状態にて、ＪＩＳＫ７１２９で規定された方法で測定した水蒸気透過率を指す。 In the present invention, the water vapor transmission rate of the base film alone refers to the water vapor transmission rate defined in JIS K7129, and the water vapor transmission rate of the pressure-sensitive adhesive layer is 6 μm in thickness as described in the examples described later. The water vapor transmission rate measured by the method defined in JISK7129 in a state of being sandwiched between two polyethylene terephthalate films.
本発明の防水用両面粘着テープは、携帯情報端末機器を構成する部材、例えば、情報表示部と筐体、カメラ周り、キーパッドといった様々な箇所の固定に使用されるため、基材フィルムの両面に粘着剤層が積層されていることが必須である。 The waterproof double-sided pressure-sensitive adhesive tape of the present invention is used for fixing various parts such as a member constituting a portable information terminal device, for example, an information display unit and a casing, a camera periphery, and a keypad. It is essential that the pressure-sensitive adhesive layer is laminated.
本発明の防水用両面粘着テープに用いられる基材フィルムとしては、分子骨格がすべて炭化水素で構成されているため非常に疎水性が高く、水や水蒸気の透過を抑えることができるポリエチレンが必須である。ポリエチレンはＴｇ（ガラス転移点）が低く寒冷地での使用も可能であるので、携帯情報端末機器に好適である。 The base film used in the waterproof double-sided pressure-sensitive adhesive tape of the present invention is very hydrophobic because the molecular skeleton is entirely composed of hydrocarbons, and polyethylene that can suppress the permeation of water and water vapor is essential. is there. Since polyethylene has a low Tg (glass transition point) and can be used in cold regions, it is suitable for portable information terminal equipment.
ポリエチレンを材質として用いた基材フィルム（ポリエチレンフィルム）の密度は、０．９２〜０．９８ｇ／ｃｍ３であることが必須であり、０．９４〜０．９７ｇ／ｃｍ３が好ましく、０．９５〜０．９６ｇ／ｃｍ３がより好ましい。
基材フィルムの密度を上げることにより、水蒸気の透過を抑えることができ、芯材として発泡体基材を用いた場合の欠点を解消することができる。すなわち、本発明の防水用両面粘着テープによれば、狭いテープ幅であっても充分な防水性および防湿性を付与することができる。
The density of the base film using polyethylene as the material (polyethylene film) is essential to be 0.92~0.98g / cm 3, preferably 0.94~0.97g / cm 3, 0. 95-0.96 g / cm < 3 > is more preferable.
By increasing the density of the base film, it is possible to suppress the permeation of water vapor, and to eliminate the disadvantages of using a foam base material as a core material. That is, according to the waterproof double-sided pressure-sensitive adhesive tape of the present invention, sufficient waterproofness and moisture resistance can be imparted even with a narrow tape width.
基材フィルム単体の水蒸気透過率（厚み１００μｍの基材フィルムとした際の水蒸気透過率）としては、１０ｇ／ｍ２・ｄａｙ以下であることが必須であり、５ｇ／ｍ２・ｄａｙ以下であることが好ましい。尚、本発明において基材フィルム単体の水蒸気透過率とは、ＪＩＳＫ７１２９で規定される水蒸気透過率を指す。 The water vapor transmission rate of the substrate film alone (water vapor transmission rate when a substrate film having a thickness of 100 μm) is essential to be 10 g / m 2 · day or less, and 5 g / m 2 · day or less. It is preferable. In addition, in this invention, the water vapor transmission rate of a base film single-piece | unit refers to the water vapor transmission rate prescribed | regulated by JISK7129.
基材フィルムの厚さとしては、特に限定されないが、加工性、薄型化の観点から、２μｍ〜５００μｍが好ましく、５μｍ〜３００μｍがより好ましく、５μｍ〜２００μｍが特に好ましい。２μｍ以上とすることにより、基材自体の加工性、２次加工性及び強度を確保でき、５００μｍ以下とすることにより、柔軟性を確保できる。 Although it does not specifically limit as thickness of a base film, 2 micrometers-500 micrometers are preferable from a viewpoint of workability and thickness reduction, 5 micrometers-300 micrometers are more preferable, and 5 micrometers-200 micrometers are especially preferable. By setting it as 2 micrometers or more, the workability of a base material itself, secondary workability, and intensity | strength can be ensured, and a softness | flexibility can be ensured by setting it as 500 micrometers or less.
本発明の防水用両面粘着テープに用いられる粘着剤層の水蒸気透過率（厚み５０μｍの粘着剤層とした際の水蒸気透過率）は、いずれも１０ｇ／ｍ２・ｄａｙ以下であることが必須であり、５ｇ／ｍ２・ｄａｙ以下であることが好ましい。尚、本発明における粘着剤層の水蒸気透過率とは、後述する実施例で記載している通り、厚み６μｍのポリエチレンテレフタレートフィルム２枚に挟持された状態にて、ＪＩＳＫ７１２９で規定された方法で測定した水蒸気透過率を指す。 It is essential that the water vapor transmission rate of the pressure-sensitive adhesive layer used in the waterproof double-sided pressure-sensitive adhesive tape of the present invention (water vapor transmission rate when a pressure-sensitive adhesive layer having a thickness of 50 μm is used) is 10 g / m 2 · day or less. Yes, 5 g / m 2 · day or less is preferable. The water vapor permeability of the pressure-sensitive adhesive layer in the present invention is measured by a method defined in JIS K7129 in a state of being sandwiched between two 6 μm-thick polyethylene terephthalate films, as described in Examples described later. Refers to the water vapor transmission rate.
粘着剤層を構成する粘着剤としては、特に限定されず、アクリル系粘着剤、シリコーン系粘着剤、ポリエステル系粘着剤、ゴム系粘着剤などが挙げられるが、水蒸気透過率が低いという観点からゴム系粘着剤が好ましい。 The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, and examples thereof include acrylic pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, polyester-based pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, etc., from the viewpoint of low water vapor permeability. System adhesives are preferred.
ゴム系粘着剤は、主成分としてのゴム系高分子と、粘着付与剤、可塑剤、軟化剤等の添加剤とから構成される粘着剤である。本発明の防水用両面粘着テープにおける粘着力は、粘着剤、軟化剤、可塑剤の選択や含有量の制御などにより調整することができる。 The rubber-based adhesive is an adhesive composed of a rubber-based polymer as a main component and additives such as a tackifier, a plasticizer, and a softener. The adhesive strength of the waterproof double-sided pressure-sensitive adhesive tape of the present invention can be adjusted by selecting an adhesive, a softener, a plasticizer, controlling the content, and the like.
ゴム系高分子としては、例えばポリブテン、ポリイソブチレン、イソプレン−イソブチレン共重合体、スチレン−イソプレン−スチレンブロック共重合体、スチレン−ブタジエン−スチレンブロック共重合体、スチレン−ブタジエンゴム共重合体、及びこれらの混合物が挙げられるが、水蒸気透過率が低い点からポリイソブチレンが特に好ましい。 Examples of rubber polymers include polybutene, polyisobutylene, isoprene-isobutylene copolymer, styrene-isoprene-styrene block copolymer, styrene-butadiene-styrene block copolymer, styrene-butadiene rubber copolymer, and these Among them, polyisobutylene is particularly preferable from the viewpoint of low water vapor permeability.
前記ポリイソブチレン樹脂の重量平均分子量としては２万以上が好ましく、２０万〜６００万がより好ましく、５０万〜５００万が特に好ましい。
また、ポリイソブチレン樹脂の含有量は、粘着剤中、１０〜９５質量％が好ましく２０〜９０質量％がより好ましく、３０〜８０質量％が特に好ましい。
The weight average molecular weight of the polyisobutylene resin is preferably 20,000 or more, more preferably 200,000 to 6,000,000, and particularly preferably 500,000 to 5,000,000.
The content of the polyisobutylene resin is preferably 10 to 95% by mass, more preferably 20 to 90% by mass, and particularly preferably 30 to 80% by mass in the pressure-sensitive adhesive.
粘着付与剤としては、特に限定されず、水添石油樹脂（例えばジシクロペンタジエン等）、ロジン、ロジン誘導体（例えばロジンのグリセリンエステル、水添ロジン、水添ロジンのグリセリンエステル、ロジンのペンタエリストールエステル等）、テルペン樹脂、水添テルペン樹脂、テルペンフェノール樹脂、変性テルペン樹脂、液状樹脂、樹脂エマルジョン、アルキルフェノール樹脂、石炭酸樹脂、酢酸ビニル系樹脂等が挙げられるが、透明性、耐黄変性の観点から水添石油樹脂がより好ましく、ジシクロペンタジエンが特に好ましい。
これらは、１種単独で、又は２種以上を併用してもよい。
これら粘着付与剤の含有量は、粘着剤中、１０〜９０質量％が好ましく２０〜７５質量％がより好ましく、３０〜６０質量％が特に好ましい。
The tackifier is not particularly limited, and is a hydrogenated petroleum resin (for example, dicyclopentadiene), rosin, rosin derivative (for example, glycerin ester of rosin, hydrogenated rosin, glycerin ester of hydrogenated rosin, pentaerythritol of rosin) Esters, etc.), terpene resins, hydrogenated terpene resins, terpene phenol resins, modified terpene resins, liquid resins, resin emulsions, alkylphenol resins, carboxylic acid resins, vinyl acetate resins, etc., in terms of transparency and yellowing resistance Hydrogenated petroleum resin is more preferable, and dicyclopentadiene is particularly preferable.
These may be used alone or in combination of two or more.
As for content of these tackifiers, 10-90 mass% is preferable in an adhesive, 20-75 mass% is more preferable, 30-60 mass% is especially preferable.
すなわち、本発明の防水用両面粘着テープは、粘着剤層の粘着剤が、ポリイソブチレン樹脂と、水添石油樹脂とを含有するゴム系粘着剤であることが好ましく、ポリイソブチレン樹脂と、ジシクロペンタジエンとを含有するゴム系粘着剤であることが特に好ましい。 That is, in the waterproof double-sided pressure-sensitive adhesive tape of the present invention, the pressure-sensitive adhesive in the pressure-sensitive adhesive layer is preferably a rubber-based pressure-sensitive adhesive containing a polyisobutylene resin and a hydrogenated petroleum resin. A rubber-based pressure-sensitive adhesive containing pentadiene is particularly preferable.
可塑剤としては、石油系オイル（例えば、パラフィン系プロセスオイル、ナフテン系プロセスオイル、芳香族系プロセスオイル等）、スクワラン、スクワレン、植物系オイル（例えば、オリーブ油、ツバキ油、ひまし油、トール油、ラッカセイ油等）、シリコンオイル、二塩基酸エステル（例えば、ジブチルフタレート、ジオクチルフタレート等）、液状ゴム（例えば、液状ポリブテン、液状イソプレンゴム等）等が挙げられる。中でも、ゴム系高分子との相溶性が良好な液状ポリイソブチレン、液状ポリブテンが好ましい。
これらの成分は、１種単独で、又は２種以上を併用してもよい。
これら可塑剤の含有量は、粘着剤中、５０質量％以下が好ましく１〜４０質量％がより好ましく、３〜３０質量％が特に好ましい。
Plasticizers include petroleum oils (eg, paraffinic process oil, naphthenic process oil, aromatic process oil, etc.), squalane, squalene, vegetable oils (eg, olive oil, camellia oil, castor oil, tall oil, peanut Oil), silicon oil, dibasic acid ester (for example, dibutyl phthalate, dioctyl phthalate, etc.), liquid rubber (for example, liquid polybutene, liquid isoprene rubber, etc.) and the like. Among these, liquid polyisobutylene and liquid polybutene having good compatibility with the rubber polymer are preferable.
These components may be used alone or in combination of two or more.
The content of these plasticizers is preferably 50% by mass or less, more preferably 1 to 40% by mass, and particularly preferably 3 to 30% by mass in the pressure-sensitive adhesive.
また、溶剤としては、例えば、トルエン、キシレン等の芳香族炭化水素、ヘキサン等の脂肪族炭化水素、酢酸エチル、酢酸ブチル等のエステル、メチルエチルケトン（ＭＥＫ）等のケトン類、ジメチルホルムアミド、シクロヘキサノンなど挙げられる。これらは単独で使用してもよいし、２種以上を併用してもよい。 Examples of the solvent include aromatic hydrocarbons such as toluene and xylene, aliphatic hydrocarbons such as hexane, esters such as ethyl acetate and butyl acetate, ketones such as methyl ethyl ketone (MEK), dimethylformamide, and cyclohexanone. It is done. These may be used alone or in combination of two or more.
本発明の防水用両面粘着テープに用いられる粘着剤層の厚さとしては、特に限定されないが、５μｍ〜６０μｍが好ましく、１０μｍ〜６０μｍがより好ましい。５μｍ以上とすることにより、十分な粘着力を確保することができ、６０μｍ以下とすることにより、粘着剤がはみ出すことなく加工性を確保できる。 Although it does not specifically limit as thickness of the adhesive layer used for the double-sided adhesive tape for waterproofing of this invention, 5 micrometers-60 micrometers are preferable and 10 micrometers-60 micrometers are more preferable. By setting it as 5 micrometers or more, sufficient adhesive force can be ensured, and by setting it as 60 micrometers or less, workability can be ensured without an adhesive protruding.
また、本発明の防水用両面粘着テープは、搬送時や使用時の利便性から、剥離シートを積層したものが好ましい。本発明の防水用両面粘着テープが２枚の剥離シートに挟持された形態でもよいし、両面に離型性を持たせた１枚の剥離シートと積層してそのまま巻き取った形態でもよい。 In addition, the waterproof double-sided pressure-sensitive adhesive tape of the present invention is preferably a laminate of release sheets for convenience during transportation and use. The waterproof double-sided pressure-sensitive adhesive tape of the present invention may be sandwiched between two release sheets, or may be stacked with a single release sheet having releasability on both sides and wound up as it is.
本発明の防水用両面粘着テープに用いられる剥離シートとしては、種々の剥離シートを使用できるが、代表的に剥離性を表面に有する剥離シート用基材から構成される。剥離シート用基材としては、ポリエチレンテレフタレート、ポリエチレン、ポリプロピレン、ポリブデン、ポリブタジエン、ポリメチルペンテン、ポリ塩化ビニル、塩化ビニル共重合体、ポリブチレンテレフタレート、ポリウレタン、エチレン−酢酸ビニル共重合体、アイオノマー樹脂、エチレン（メタ）アクリル酸共重合体、ポリスチレン、ポリカーボネート、フッ素樹脂、低密度ポリエチレン、直鎖低密度ポリエチレン、トリアセチルセルロース等の樹脂フィルムや、上質紙、コート紙、グラシン紙、ラミネート紙などが挙げられる。剥離シート用基材の厚さは、５μｍ〜３００μｍが好ましく、１０μｍ〜２００μｍがより好ましい。 Although various release sheets can be used as the release sheet used in the waterproof double-sided pressure-sensitive adhesive tape of the present invention, the release sheet is typically composed of a release sheet substrate having release properties on the surface. As the release sheet substrate, polyethylene terephthalate, polyethylene, polypropylene, polybutene, polybutadiene, polymethylpentene, polyvinyl chloride, vinyl chloride copolymer, polybutylene terephthalate, polyurethane, ethylene-vinyl acetate copolymer, ionomer resin, Resin films such as ethylene (meth) acrylic acid copolymer, polystyrene, polycarbonate, fluororesin, low density polyethylene, linear low density polyethylene, triacetyl cellulose, fine paper, coated paper, glassine paper, laminated paper, etc. It is done. The thickness of the release sheet substrate is preferably 5 μm to 300 μm, and more preferably 10 μm to 200 μm.
剥離シート用基材の表面に剥離性を持たせるには、その表面にフッ素系樹脂、シリコーン系樹脂、長鎖アルキル基含有カルバメート等の剥離剤を塗布により設ける。剥離剤の厚さは、０．０５μｍ〜２．０μｍが好ましく、０．１μｍ〜１．５μｍがより好ましい。
本発明の防水用両面粘着テープを製造する際には、それぞれの剥離シートの剥離力に差をつけておくことが好ましい。剥離力に差をつけておけば、軽剥離シート側のみを剥がす際に、粘着剤層が重剥離シート側から浮くおそれや、双方の剥離シートに追従しようとして粘着剤層が引き伸ばされて変形するおそれを防ぐことができる。また、両面に離型性を持たせた１枚の剥離シートと積層してそのまま巻き取った両面粘着テープ形態の場合においても、剥離シートの表裏で剥離力に差をつけておくことで、同様の効果が得られる。
In order to give the surface of the release sheet substrate a release property, a release agent such as a fluorine resin, a silicone resin, or a long chain alkyl group-containing carbamate is provided on the surface by coating. The thickness of the release agent is preferably 0.05 μm to 2.0 μm, and more preferably 0.1 μm to 1.5 μm.
When producing the waterproof double-sided pressure-sensitive adhesive tape of the present invention, it is preferable to make a difference in the peeling force of each release sheet. If there is a difference in the peel force, when peeling only the light release sheet side, the adhesive layer may float from the heavy release sheet side, or the adhesive layer will stretch and deform to follow both release sheets Fear can be prevented. In addition, even in the case of a double-sided pressure-sensitive adhesive tape that is laminated and wound as it is with a single release sheet that has releasability on both sides, The effect is obtained.
本発明の防水用両面粘着テープは、例えばゴム系粘着剤をポリエチレンフィルム上に層状に設けることにより得られる。本発明の防水用両面粘着テープの具体的な製造方法としては、例えば以下のような製造方法が挙げられる。
軽剥離シートの剥離処理面に粘着剤を塗布する。次いでその粘着剤層にポリエチレンフィルムを貼り合わせて片面に粘着剤層を有する粘着テープとする。一方で重剥離シートの剥離処理面に粘着剤を塗布する。その粘着剤層に前記片面粘着テープのポリエチレンフィルム面を貼合し、本発明の防水用両面粘着テープを得る。
また、別の方法としてポリエチレンフィルムの片面に粘着剤を塗布し、その粘着剤層に軽剥離シートを貼合し、さらにポリエチレンフィルムの逆の面にも粘着両面に粘着剤含有組成物を直接塗布し、剥離シートを貼り合わせて積層体としてもよい。
The waterproof double-sided pressure-sensitive adhesive tape of the present invention can be obtained, for example, by providing a rubber-based pressure-sensitive adhesive in layers on a polyethylene film. Specific examples of the method for producing the waterproof double-sided pressure-sensitive adhesive tape of the present invention include the following production methods.
An adhesive is applied to the release surface of the light release sheet. Next, a polyethylene film is bonded to the pressure-sensitive adhesive layer to obtain a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer on one side. On the other hand, an adhesive is applied to the release treatment surface of the heavy release sheet. The polyethylene film surface of the said single-sided adhesive tape is bonded to the adhesive layer, and the waterproof double-sided adhesive tape of this invention is obtained.
As another method, a pressure-sensitive adhesive is applied to one side of a polyethylene film, a light release sheet is bonded to the pressure-sensitive adhesive layer, and a pressure-sensitive adhesive-containing composition is directly applied to both sides of the polyethylene film on the opposite side. Then, a release sheet may be attached to form a laminate.
次に、本発明の防水用両面粘着テープの使用形態について説明する。
近年の携帯情報端末機能用途においては、画面の大型化に伴い、防水用両面粘着テープは幅が狭いものが求められる場合がある。このような場合、発泡体を使用した従来の防水用両面粘着テープでは、水の浸透を制御する独立気泡の泡壁を幅方向に対して十分に確保できない恐れがあり、十分な防水性は達成されない。本発明の防水用両面粘着テープにおいては、水蒸気透過率の低いポリエチレンを基材としており、さらに水蒸気透過率の低い粘着剤層を基材の両面に積層させているので、本発明の防水用両面粘着テープは、水蒸気透過率が低く水蒸気バリア性の面で優れているため湿気を嫌う精密機器から構成されている携帯情報端末の使用に適している。また、本発明の防水用両面粘着テープの有する防水性、防湿性は、携帯情報端末機器を構成する部材の面に対してだけでなく、積層された部材の断面に対しても発揮される。
このように本発明の防水用両面粘着テープを用いた携帯情報端末機器においては、狭い幅の額縁状に打ち抜かれた形状が適しており、その幅は０．１〜５．０ｍｍであることが好ましく、０．３〜３．０ｍｍであることがさらに好ましく、０．５〜２．０ｍｍが特に好ましい。
Next, the usage form of the waterproof double-sided pressure-sensitive adhesive tape of the present invention will be described.
In recent portable information terminal function applications, a waterproof double-sided pressure-sensitive adhesive tape having a narrow width may be required with an increase in screen size. In such cases, the conventional double-sided adhesive tape for waterproofing that uses foam may not be able to secure a sufficient bubble wall of closed cells for controlling the penetration of water in the width direction. Not. In the waterproof double-sided pressure-sensitive adhesive tape of the present invention, polyethylene having a low water vapor transmission rate is used as a base material, and an adhesive layer having a low water vapor transmission rate is laminated on both surfaces of the base material. The adhesive tape has a low water vapor transmission rate and is excellent in water vapor barrier properties, and therefore is suitable for use in a portable information terminal composed of precision equipment that dislikes moisture. Further, the waterproof and moisture-proof properties of the waterproof double-sided pressure-sensitive adhesive tape of the present invention are exhibited not only on the surface of the member constituting the portable information terminal device but also on the cross-section of the laminated member.
Thus, in the portable information terminal device using the waterproof double-sided pressure-sensitive adhesive tape of the present invention, a shape punched into a narrow frame shape is suitable, and the width is 0.1 to 5.0 mm. Preferably, it is 0.3 to 3.0 mm, more preferably 0.5 to 2.0 mm.
また前述のように本発明の防水用両面粘着テープは、携帯情報端末機器内部固定用に用いられることが好ましい。 Moreover, as described above, the waterproof double-sided pressure-sensitive adhesive tape of the present invention is preferably used for internal fixation of a portable information terminal device.
さらに本発明の両面粘着テープは、基材フィルムの両面に粘着剤層が積層された構成であるが、特に厚みが必要である場合は、基材と粘着剤層が交互に複数存在する形態が好ましく、粘着剤層/基材フィルム/粘着剤層/基材フィルム/粘着剤層の順で積層された５層構造のものであるものが特に好ましい。５層構造とした場合、中間の粘着剤層が緩衝層として作用するため凹凸追従性と衝撃吸収性が向上する。 Furthermore, the double-sided pressure-sensitive adhesive tape of the present invention has a structure in which pressure-sensitive adhesive layers are laminated on both sides of a base film, but in particular when there is a need for thickness, there is a form in which a plurality of base materials and pressure-sensitive adhesive layers exist alternately. A layer having a five-layer structure in which a pressure-sensitive adhesive layer / base film / pressure-sensitive adhesive layer / base film / pressure-sensitive adhesive layer is laminated in this order is particularly preferable. In the case of a five-layer structure, the intermediate pressure-sensitive adhesive layer acts as a buffer layer, so that unevenness followability and impact absorption are improved.
以下、実施例により本発明をさらに具体的に説明するが、本発明は以下の実施例に限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited to a following example.
（実施例１）
ゴム状炭化水素系エラストマーであるポリブテン−ポリイソブチレン系樹脂（新日本化学株式会社製、製品名「エバータックＳＡ４００Ｅ」、分子量６０万）１００重量部と粘着付与剤(荒川化学工業社製、製品名「アルコンＰ−１２５」、水添石油樹脂)５０重量部、及びトルエン１００質量部を混合して粘着剤組成物を得た。
この粘着剤組成物を、軽剥離シート（リンテック社製、製品名「ＳＰ−ＰＥＴ３８１０３１」）の剥離処理面に、ナイフコーターを用いて乾燥後の膜厚が５０μｍになるように塗布し、１００℃で約１分間乾燥後、両面にコロナ処理を施した基材フィルム（タマポリ社製、高密度ポリエチレンフィルム、製品名「ＨＤ」、厚さ１００μｍ）を乾燥した粘着剤面にラミネートし、片面粘着テープを得た。
次いで前述と同様に作成した粘着剤組成物を、重剥離シート（リンテック社製、製品名「ＳＰ−ＰＥＴ３８１１」）の剥離処理面に、ナイフコーターを用いて乾燥後の膜厚が５０μｍになるように塗布し、１００℃で約１分間乾燥後、前記片面粘着テープのポリエチレンフィルム面に貼合し、両面粘着テープを得た。
Example 1
100 parts by weight of a polybutene-polyisobutylene resin (manufactured by Shin Nippon Chemical Co., Ltd., product name “Evertac SA400E”, molecular weight 600,000), which is a rubbery hydrocarbon elastomer, and a tackifier (manufactured by Arakawa Chemical Industries, Ltd., product name) 50 parts by weight of “Alcon P-125” (hydrogenated petroleum resin) and 100 parts by mass of toluene were mixed to obtain an adhesive composition.
This pressure-sensitive adhesive composition was applied to the release-treated surface of a light release sheet (product name “SP-PET 381031” manufactured by Lintec Corporation) using a knife coater so that the film thickness after drying was 50 μm, and 100 ° C. After drying for about 1 minute, a base film (made by Tamapoly, high-density polyethylene film, product name “HD”, thickness 100 μm) that has been corona-treated on both sides is laminated on the dried adhesive surface, and single-sided adhesive tape Got.
Next, the pressure-sensitive adhesive composition prepared in the same manner as described above was applied to the release-treated surface of the heavy release sheet (product name “SP-PET3811”, manufactured by Lintec Corporation) using a knife coater so that the film thickness after drying was 50 μm. And dried at 100 ° C. for about 1 minute, and then bonded to the polyethylene film surface of the single-sided adhesive tape to obtain a double-sided adhesive tape.
（実施例２）
ポリイソブチレン樹脂（ＢＡＳＦ社製、製品名「オパノール Ｂ１００」、分子量１１０万）６０重量部と粘着性付与剤(出光興産社製、製品名「アイマーブＰ−１００」、水素添加石油樹脂)４０重量部、及びトルエン１００質量部を混合して得られた粘着剤組成物を用いたこと以外は、実施例１と同様の方法で両面粘着テープを得た。
(Example 2)
60 parts by weight of polyisobutylene resin (manufactured by BASF, product name “Opanol B100”, molecular weight 1.1 million) and tackifier (product name “Imabe P-100”, hydrogenated petroleum resin by Idemitsu Kosan Co., Ltd.) 40 parts by weight And the double-sided adhesive tape was obtained by the method similar to Example 1 except having used the adhesive composition obtained by mixing 100 mass parts of toluene.
（実施例３）
ポリイソブチレン樹脂（ＢＡＳＦ社製、製品名「オパノール Ｂ２００」、分子量４１０万）６０重量部と粘着性付与剤(ヤスハラケミカル社製、水素添加テルペン樹脂、製品名「Ｃｌｅａｒｏｎ Ｐ８５」)４０重量部、及びトルエン１００質量部を混合して得られた粘着剤組成物を用いたこと以外は、実施例１と同様の方法で両面粘着テープを得た。
(Example 3)
60 parts by weight of polyisobutylene resin (manufactured by BASF, product name “Opanol B200”, molecular weight 4.1 million) and tackifier (Yasuhara Chemical Co., Ltd., hydrogenated terpene resin, product name “Clearon P85”) 40 parts by weight, and toluene A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive composition obtained by mixing 100 parts by mass was used.
（実施例４）
基材フィルムとして中密度ポリエチレンフィルム（タマポリ社製、製品名「ＮＢ−１」、厚さ１００μｍ）を用いたこと以外は、実施例１と同様の方法で両面粘着テープを得た。
Example 4
A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that a medium density polyethylene film (manufactured by Tamapoly, product name “NB-1”, thickness 100 μm) was used as the base film.
（実施例５）
基材フィルムとして低密度ポリエチレンフィルム（タマポリ社製、製品名「Ａ−１」、厚さ１００μｍ）を用いたこと以外は、実施例１と同様の方法で両面粘着テープを得た。
(Example 5)
A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that a low-density polyethylene film (manufactured by Tamapoly, product name “A-1”, thickness 100 μm) was used as the base film.
（実施例６）
実施例１の途中で得られた片面粘着シートを用意した。一方それとは別に実施例１で得られた両面粘着テープの軽剥離シートのみを剥離し、用意した片面粘着シートを表出した粘着剤層にラミネートし、軽剥離シート/粘着剤/基材フィルム/粘着剤/基材フィルム/粘着剤/重剥離シートの構成を有する両面粘着テープを得た。
(Example 6)
A single-sided PSA sheet obtained in the middle of Example 1 was prepared. On the other hand, only the light release sheet of the double-sided pressure-sensitive adhesive tape obtained in Example 1 was peeled off, and the prepared single-sided pressure-sensitive adhesive sheet was laminated on the exposed pressure-sensitive adhesive layer, and the light release sheet / pressure-sensitive adhesive / base film / A double-sided pressure-sensitive adhesive tape having a configuration of pressure-sensitive adhesive / base film / pressure-sensitive adhesive / heavy release sheet was obtained.
（比較例１）
アクリル酸ｎ−ブチル７９重量％、アクリル酸メチル２０重量％、アクリル酸ヒドロキシエチル１重量％を共重合して得たアクリル酸エステル共重合体（分子量：５０万、濃度３５ｗｔ％）１００重量部に、トルエン及びキシリレンジイソシアネート系３官能性アダクト体（綜研化学社製、製品名「ＴＤ−７５」、濃度７５ｗｔ％）を０．１重量部添加し、撹拌して得られた粘着剤組成物を使用し、基材フィルムとして黒色ポリオレフィン系発泡体（積水化学工業社製、製品名「ボラーラ」、厚さ１００μｍ）を用いたこと以外は、実施例１と同様の方法で両面粘着テープを得た。
(Comparative Example 1)
100 parts by weight of acrylic acid ester copolymer (molecular weight: 500,000, concentration 35 wt%) obtained by copolymerizing 79% by weight of n-butyl acrylate, 20% by weight of methyl acrylate and 1% by weight of hydroxyethyl acrylate 0.1 part by weight of toluene and xylylene diisocyanate trifunctional adduct (manufactured by Soken Chemical Co., Ltd., product name “TD-75”, concentration 75 wt%) was added to the pressure-sensitive adhesive composition obtained by stirring. A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that a black polyolefin-based foam (manufactured by Sekisui Chemical Co., Ltd., product name “Borara”, thickness 100 μm) was used as the base film. .
（比較例２）
基材フィルムとして高密度ポリエチレンフィルム（タマポリ社製、製品名「ＨＤ」、厚さ１００μｍ）を用いたこと以外は、比較例１と同様の方法で両面粘着テープを得た。
(Comparative Example 2)
A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Comparative Example 1 except that a high-density polyethylene film (manufactured by Tamapoly, product name “HD”, thickness 100 μm) was used as the base film.
（比較例３）
基材フィルムとして黒色ポリオレフィン系発泡体（積水化学工業社製、製品名「ボラーラ」、厚さ１００μｍ）を用いたこと以外は、実施例１と同様の方法で両面粘着テープを得た。
(Comparative Example 3)
A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that a black polyolefin-based foam (manufactured by Sekisui Chemical Co., Ltd., product name “Borara”, thickness 100 μm) was used as the base film.
実施例１〜５及び比較例１〜３の粘着剤を、以下の試験方法で測定し、結果を表１に示した。
（１） 水蒸気透過率
ＪＩＳＫ７１２９に準じて、水蒸気透過度計（ＬＹＳＳＹ社製、製品名「Ｌ８０−５０００」）を使用して測定した。但し、粘着剤に関しては、ポリエチレンテレフタレートフィルム（三菱樹脂社製、製品名「Ｋ２００−６Ｅ」、厚み６μｍ、以下「ＰＥＴ６μｍ」)を粘着剤層５０μｍの両面に貼付し、ＰＥＴ６μｍ／粘着剤層５０μｍ／ＰＥＴ６μｍの構成で測定した。
The pressure-sensitive adhesives of Examples 1 to 5 and Comparative Examples 1 to 3 were measured by the following test methods, and the results are shown in Table 1.
(1) Water vapor permeability Measured according to JISK7129 using a water vapor permeability meter (manufactured by LYSSY, product name “L80-5000”). However, regarding the adhesive, a polyethylene terephthalate film (manufactured by Mitsubishi Plastics, product name “K200-6E”, thickness 6 μm, hereinafter referred to as “PET 6 μm”) is stuck on both sides of the adhesive layer 50 μm, and PET 6 μm / adhesive layer 50 μm / Measurements were made with a PET 6 μm configuration.
（２） 防水性試験
図１に示されるように、実施例および比較例で得られた両面粘着テープ２を外形寸法６０ｍｍ×６０ｍｍで幅が２ｍｍの額縁状に裁断し、７０ｍｍ×７０ｍｍ×２ｍｍ厚のガラス板１に貼付した。前記両面粘着テープ２の内側四隅に水没判定テープ３（住友スリーエム社製、製品名「水没検知テープ５５５７」）を貼付後、両面粘着テープ２でもう１枚のガラス１’に貼着し、内側の空間がガラス１、１’で封止されるようにした。作製した試験体を常温で、水道水、かつ静水の水深１ｍの水槽４に沈め、７２時間水底に放置した。その後、額縁内への浸水の有無を評価した。
評価基準を以下に示した。
○：浸水なし （水没判定テープの色変化なし）
△：わずかに浸水（水没判定テープがわずかに色変化）
×：浸水あり （水没判定テープが色変化）
(2) Waterproof test As shown in FIG. 1, the double-sided pressure-sensitive
The evaluation criteria are shown below.
○: No water immersion (No color change of submerged judgment tape)
△: Slightly submerged (submersion determination tape slightly changes color)
×: Submerged (submersion determination tape changes color)
（３） 防湿性試験
図２に示されるように、実施例および比較例で得られた両面粘着テープ５を１２．５ｍｍ×１２．５ｍｍの大きさに裁断し、７０ｍｍ×７０ｍｍ×２ｍｍ厚のガラス板６の表面に貼付した。次いでガラスセル７（藤原製作所社製、製品名「ＭＧ−１０」、外形１２．５ｍｍ×１２．５ｍｍ×全高４６．２５ｍｍで縁の厚みが１．２５ｍｍ、光路長１０ｍｍ×光路幅１０ｍｍ×高さ４５ｍｍ）の内側にモレキュラシーブス８（和光純薬工業社製 製品名「モレキュラシーブス３Ａ １／１６」）を約２ｇ入れ、前記両面粘着テープ５がガラスセル７の縁全体を覆うように、ガラス板６とガラスセル７を貼り合せて試料を作成した。試料の作製は２３℃５０％Ｒｈ環境下で行った。前述の試料を６０℃９５％Ｒｈ環境下で７日間促進し、取り出したモレキュラシーブス８の重量変化を測定した。
重量変化率（％）＝（Ｗ−Ｗ０）×１００／Ｗ０
Ｗ ：促進後モレキュラシーブスの重量
Ｗ０ ：促進前のモレキュラシーブスの重量
算出した重量変化率から下記評価基準に従い防湿性を評価した。
○：水蒸気侵入なし （重量変化率が１．０％未満）
△：わずかに水蒸気侵入（重量変化率が１．０％以上、２．５％未満）
×：水蒸気侵入あり （重量変化率が２．５％以上）
(3) Moisture Proof Test As shown in FIG. 2, the double-sided pressure-sensitive
Weight change rate (%) = (W−W 0 ) × 100 / W 0
W: Weight of molecular sieves after promotion W 0 : Weight of molecular sieves before promotion The moisture resistance was evaluated from the calculated weight change rate according to the following evaluation criteria.
○: No water vapor intrusion (weight change rate is less than 1.0%)
Δ: Slight water vapor intrusion (weight change rate is 1.0% or more and less than 2.5%)
X: Water vapor intrusion (weight change rate is 2.5% or more)
（４） 凹凸追従性試験
平滑なアクリル板に、長さ５０ｍｍ、幅５ｍｍ、厚さ１０μｍの直線状の黒色印刷を行い、凹凸を作製した。その凹凸全面に実施例および比較例で得られた両面粘着テープを貼付した。その際、黒色印刷端部の縁の空気溜り（エア噛み）の有無を光学顕微鏡（倍率１００倍）にて確認した。
○：エア噛みが無く貼り合せできている
×：エア噛みが発生した
(4) Concavity and convexity follow-up test On a smooth acrylic plate, linear black printing having a length of 50 mm, a width of 5 mm, and a thickness of 10 μm was performed to produce concavities and convexities. Double-sided pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples were attached to the entire surface of the irregularities. At that time, the presence or absence of air accumulation (air biting) at the edge of the black print end was confirmed with an optical microscope (magnification 100 times).
○: There is no air bite and it can be pasted. ×: Air bite has occurred.
表１に示すとおり、基材フィルムの水蒸気透過率が１０ｇ／ｍ２・ｄａｙ以下であり、粘着剤の水蒸気透過率が１０ｇ／ｍ２・ｄａｙ以下である本発明の防水用両面粘着テープを用いた実施例１〜６は、比較例１〜３に比べて防水性、防湿性の面で優れていた。特に中密度、高密度のポリエチレンフィルムを用いた実施例１〜４及び実施例６では浸水が全くなかった。 As shown in Table 1, the waterproof double-sided pressure-sensitive adhesive tape of the present invention in which the water vapor transmission rate of the base film is 10 g / m 2 · day or less and the water vapor transmission rate of the adhesive is 10 g / m 2 · day or less is used. Examples 1 to 6 were superior in terms of waterproofness and moisture resistance compared to Comparative Examples 1 to 3. In particular, in Examples 1 to 4 and Example 6 using medium density and high density polyethylene films, there was no water immersion.
１、１’、６ ガラス板
２、５ 両面粘着テープ
３ 水没判定テープ
４ 水槽
７ ガラスセル
８ モレキュラシーブス
1, 1 ', 6
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| JP5740124B2 (en) * | 2010-09-29 | 2015-06-24 | リンテック株式会社 | Double-sided adhesive tape and display device with touch panel |
| TWI552883B (en) | 2011-07-25 | 2016-10-11 | Lintec Corp | Gas barrier film laminates and electronic components |
| JP5918488B2 (en) * | 2011-07-25 | 2016-05-18 | リンテック株式会社 | Gas barrier film laminate and electronic member |
| JP5937312B2 (en) * | 2011-07-25 | 2016-06-22 | リンテック株式会社 | Gas barrier film laminate and electronic member |
| ES2450316B1 (en) * | 2012-09-20 | 2015-07-30 | Laystil, S.A. | Procedure for waterproofing containers |
| JP6105412B2 (en) * | 2013-07-03 | 2017-03-29 | 早川ゴム株式会社 | Adhesive tape for flat panel display |
| JP6131165B2 (en) * | 2013-10-09 | 2017-05-17 | 富士フイルム株式会社 | Laminate for touch panel |
| JP6432063B2 (en) * | 2014-12-26 | 2018-12-05 | リンテック株式会社 | Waterproof double-sided adhesive tape and portable information terminal device |
| JP2016160276A (en) * | 2015-02-26 | 2016-09-05 | 積水化学工業株式会社 | Adhesive tape |
| JP6725373B2 (en) * | 2015-09-16 | 2020-07-15 | 日東電工株式会社 | Adhesive composition, adhesive layer, optical film with adhesive layer, optical member, and image display device |
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| US6419966B1 (en) * | 1994-12-22 | 2002-07-16 | Exxonmobil Chemical Patents Inc. | Polyethylene articles with improved resistance to water vapor transmission |
| JPH1088083A (en) * | 1996-09-19 | 1998-04-07 | Sekisui Chem Co Ltd | Double-coated self-adhesive tape for fixing substrate of interior wall |
| JP2007197517A (en) * | 2006-01-24 | 2007-08-09 | Three M Innovative Properties Co | Adhesive sealing composition, sealing film and organic el element |
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