JP6450080B2 - Adhesive tape - Google Patents
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- JP6450080B2 JP6450080B2 JP2014072878A JP2014072878A JP6450080B2 JP 6450080 B2 JP6450080 B2 JP 6450080B2 JP 2014072878 A JP2014072878 A JP 2014072878A JP 2014072878 A JP2014072878 A JP 2014072878A JP 6450080 B2 JP6450080 B2 JP 6450080B2
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- 239000002390 adhesive tape Substances 0.000 title claims description 21
- 239000010410 layer Substances 0.000 claims description 66
- 239000002344 surface layer Substances 0.000 claims description 55
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 49
- 239000012792 core layer Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 27
- 239000004711 α-olefin Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 14
- 229920001038 ethylene copolymer Polymers 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 29
- 229920001577 copolymer Polymers 0.000 description 20
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 11
- 238000003851 corona treatment Methods 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 11
- 238000001035 drying Methods 0.000 description 10
- 238000011156 evaluation Methods 0.000 description 10
- 238000009736 wetting Methods 0.000 description 10
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 9
- 239000005977 Ethylene Substances 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000000654 additive Substances 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 239000000123 paper Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- -1 greenhouses Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 4
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 4
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 4
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 4
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 4
- 239000004594 Masterbatch (MB) Substances 0.000 description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000004035 construction material Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 238000012662 bulk polymerization Methods 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 229940069096 dodecene Drugs 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 238000012685 gas phase polymerization Methods 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 229920006280 packaging film Polymers 0.000 description 2
- 239000012785 packaging film Substances 0.000 description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000013053 water resistant agent Substances 0.000 description 2
- 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
- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 239000011954 Ziegler–Natta catalyst Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 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
- 239000000945 filler Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011086 glassine Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- BOQSSGDQNWEFSX-UHFFFAOYSA-N propan-2-yl 2-methylprop-2-enoate Chemical compound CC(C)OC(=O)C(C)=C BOQSSGDQNWEFSX-UHFFFAOYSA-N 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
本発明は、粘着テープに関するものである。 The present invention relates to an adhesive tape.
多層フィルムは、食品や医薬品等の包装材料や、ビニールハウス、液晶、粘着テープ等の幅広い分野で使用されており、これまでに、用途に応じた様々な多層フィルムが開発されている。 Multi-layer films are used in a wide range of fields such as packaging materials for foods and pharmaceuticals, greenhouses, liquid crystals, and adhesive tapes, and various multi-layer films have been developed according to applications.
例えば特許文献１には、包装用フィルムの滑り性、自己密着性、熱融着性、透明性、伸展性、柔軟性等については、従来品と同等の特性を保持しながら、熱収縮性、変形に対する復元性、包装物の外観の改良を目的として、エチレン−α−オレフィン共重合体から得られた内層フィルムの両面にエチレン−酢酸ビニル共重合体フィルムが積層されている包装用フィルムが記載されている。 For example, Patent Document 1 discloses heat shrinkability, while maintaining the same properties as conventional products, such as slipperiness, self-adhesion, heat-fusibility, transparency, extensibility, and flexibility of packaging films. A packaging film in which an ethylene-vinyl acetate copolymer film is laminated on both sides of an inner layer film obtained from an ethylene-α-olefin copolymer is described for the purpose of improving resilience to deformation and the appearance of the package. Has been.
特許文献２には、フィルムの柔軟性や伸長性の改良を目的として、中間層を密度が０．９１ｇ／ｃｍ３未満のエチレン共重合体とし、両外層を密度が０．９１ｇ／ｃｍ３未満のエチレン共重合体としたフィルム又はシートが記載されている。 Patent Document 2, for the purpose of flexibility and extensibility of the improvement of the film, the intermediate layer density is ethylene copolymer is less than 0.91 g / cm 3, the outer layers density is less than 0.91 g / cm 3 A film or sheet made of an ethylene copolymer is described.
粘着テープは、医療用や建築・建材用等の様々な分野で利用されている。近年、易伸長性や耐熱性に優れ、曲面や凹凸等の複雑な形状を有する被着体に対しても剥がれることのない粘着テープが求められている。
しかしながら、特許文献１および２に記載のフィルムを用いた粘着テープは、その耐熱性や、曲面や凹凸の複雑な形状を有する被着体に対する密着性が、満足できるものではなかった。
Adhesive tapes are used in various fields such as medical use and construction / building materials. In recent years, there has been a demand for a pressure-sensitive adhesive tape that has excellent stretchability and heat resistance and does not peel even on an adherend having a complicated shape such as a curved surface or unevenness.
However, the pressure-sensitive adhesive tapes using the films described in Patent Documents 1 and 2 have not been satisfactory in heat resistance and adhesion to adherends having complicated shapes such as curved surfaces and irregularities.
本発明は、上記の問題に鑑みてなされたものであり、曲面や凹凸等の複雑な形状を有する被着体に対する密着性に優れ、かつ耐熱性に優れる粘着テープを提供することである。 This invention is made | formed in view of said problem, and is providing the adhesive tape which is excellent in the adhesiveness with respect to the adherend which has complicated shapes, such as a curved surface and an unevenness | corrugation, and is excellent in heat resistance.
本発明者は上記課題を解決するために鋭意検討した結果、本発明を完成するに至った。 As a result of intensive studies to solve the above problems, the present inventors have completed the present invention.
すなわち、本発明は、基材層と粘着層を有し、
前記基材層が、芯層と表層を有する層であり、
前記芯層が、密度８５０ｋｇ／ｍ３以上８９０ｋｇ／ｍ３以下のエチレン−α−オレフィン共重合体を含む層であり、
前記表層が、ビカット軟化点が６０℃以上１２０℃以下であるエチレン系共重合体を含む層である粘着テープに係るものである。
That is, the present invention has a base material layer and an adhesive layer,
The base material layer is a layer having a core layer and a surface layer,
The core layer is a layer containing an ethylene-α-olefin copolymer having a density of 850 kg / m 3 or more and 890 kg / m 3 or less,
The said surface layer concerns on the adhesive tape which is a layer containing the ethylene-type copolymer whose Vicat softening point is 60 degreeC or more and 120 degrees C or less.
本発明によれば、曲面や凹凸等の複雑な形状を有する被着体に対する密着性に優れ、かつ耐熱性にも優れる粘着テープを得ることができる。 ADVANTAGE OF THE INVENTION According to this invention, the adhesive tape which is excellent in the adhesiveness with respect to the to-be-adhered body which has complicated shapes, such as a curved surface and an unevenness | corrugation, and is excellent also in heat resistance can be obtained.
［基材層］
基材層は、芯層と表層を有する層である。
[Base material layer]
The base material layer is a layer having a core layer and a surface layer.
芯層は、エチレン−α−オレフィン共重合体を含有する層である。 The core layer is a layer containing an ethylene-α-olefin copolymer.
エチレン−α−オレフィン共重合体とは、エチレンに由来する単量体単位と炭素数３以上のα−オレフィンに由来する単量体単位とを含む共重合体であり、該α−オレフィンとしては、プロピレン、１−ブテン、１−ペンテン、１−ヘキセン、４−メチル−１−ペンテン、１−オクテン、１−デセン、１−ドデセン等が挙げられる。 The ethylene-α-olefin copolymer is a copolymer containing a monomer unit derived from ethylene and a monomer unit derived from an α-olefin having 3 or more carbon atoms, and as the α-olefin, , Propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene and the like.
芯層におけるエチレン−α−オレフィン共重合体の密度は、８５０ｋｇ／ｍ３以上８９０ｋｇ／ｍ３以下であり、密着性を良好なものにするために、好ましくは８５０ｋｇ／ｍ３以上８８５ｋｇ／ｍ３以下であり、より好ましくは８５０ｋｇ／ｍ３以上８８０ｋｇ／ｍ３以下である。ここで、密度はＪＩＳ Ｋ７１１２−１９８０のうちＡ法に規定された方法に従って測定される。なお、試料には、ＪＩＳ Ｋ６７６０−１９９５に記載のアニーリングを行う。 The density of the ethylene -α- olefin copolymer in the core layer, 850 kg / m 3 or more 890 kg / m 3 or less, to the adhesion to the favorable preferably 850 kg / m 3 or more 885kg / m 3 or less, more preferably 850 kg / m 3 or more 880 kg / m 3 or less. Here, the density is measured according to a method defined in Method A of JIS K7112-1980. The sample is annealed according to JIS K6760-1995.
芯層におけるエチレン−α−オレフィン共重合体のメルトフローレートは、０．０１ｇ／１０分以上３０ｇ／１０分以下であり、好ましくは０．1ｇ／１０分以上２５ｇ／１０分以下であり、より好ましくは０．５ｇ／１０分以上２０ｇ／１０分以下である。メルトフローレートはＪＩＳ Ｋ７２１０−１９９５に規定された方法に従い、荷重２．１６ｋｇ、温度１９０℃の条件で測定される。 The melt flow rate of the ethylene-α-olefin copolymer in the core layer is from 0.01 g / 10 min to 30 g / 10 min, preferably from 0.1 g / 10 min to 25 g / 10 min, more Preferably they are 0.5 g / 10min or more and 20 g / 10min or less. The melt flow rate is measured under the conditions of a load of 2.16 kg and a temperature of 190 ° C. according to the method defined in JIS K7210-1995.
エチレン−α−オレフィン共重合体の製造方法としては、公知のオレフィン重合用触媒を用いた公知の重合方法が挙げられる。例えば、チーグラー・ナッタ系触媒、メタロセン系錯体や非メタロセン系錯体などの錯体系触媒を用いた、スラリー重合法、溶液重合法、塊状重合法、気相重合法等が挙げられる。これらの製造方法の中では、メタロセン系錯体や非メタロセン系錯体などの錯体系触媒を用いる製造方法が好ましい。 As a manufacturing method of an ethylene-alpha-olefin copolymer, the well-known polymerization method using the well-known olefin polymerization catalyst is mentioned. For example, a slurry polymerization method, a solution polymerization method, a bulk polymerization method, a gas phase polymerization method and the like using a complex catalyst such as a Ziegler-Natta catalyst, a metallocene complex, or a nonmetallocene complex may be used. Among these production methods, a production method using a complex catalyst such as a metallocene complex or a nonmetallocene complex is preferable.
芯層は、上記のエチレン−α−オレフィン共重合体以外に、エチレン系樹脂や各種添加剤を含んでいてもよい。エチレン系樹脂としては、ポリエチレン、エチレン−α−オレフィン共重合体等が挙げられる。各種添加剤としては、顔料等の着色剤や酸化防止剤、光安定剤、紫外線吸収剤、難燃剤、帯電防止剤、滑剤、抗ブロッキング剤、無機フィラー、耐水剤、撥水剤、抗菌剤、加工助剤（ワックス等）等が挙げられる。 The core layer may contain an ethylene-based resin and various additives in addition to the ethylene-α-olefin copolymer. Examples of ethylene resins include polyethylene and ethylene-α-olefin copolymers. Various additives include colorants such as pigments, antioxidants, light stabilizers, ultraviolet absorbers, flame retardants, antistatic agents, lubricants, antiblocking agents, inorganic fillers, water resistant agents, water repellents, antibacterial agents, And processing aids (wax etc.).
芯層の引張最大点応力は、３５Ｍｐａ以下であり、好ましくは３０Ｍｐａ以下あり、より好ましくは２５Ｍｐａ以下である。引張最大点応力は、ＪＩＳ Ｋ６７３２に準拠して、試験速度３００ｍｍ／分で２３℃の雰囲気下で測定される。 The maximum tensile point stress of the core layer is 35 Mpa or less, preferably 30 Mpa or less, more preferably 25 Mpa or less. The maximum tensile point stress is measured in an atmosphere of 23 ° C. at a test speed of 300 mm / min according to JIS K6732.
表層は、エチレン系共重合体を含有する層である。エチレン系共重合体として、エチレン−α−オレフィン共重合体、エチレン−不飽和エステル共重合体などが挙げられる。 The surface layer is a layer containing an ethylene copolymer. Examples of the ethylene copolymer include an ethylene-α-olefin copolymer and an ethylene-unsaturated ester copolymer.
エチレン−α−オレフィン共重合体とは、エチレンに由来する単量体単位と炭素数３以上のα−オレフィンに由来する単量体単位とを含む共重合体である。該α−オレフィンとしては、プロピレン、１−ブテン、１−ペンテン、１−ヘキセン、４−メチル−１−ペンテン、１−オクテン、１−デセン、１−ドデセン等が挙げられる。 The ethylene-α-olefin copolymer is a copolymer containing a monomer unit derived from ethylene and a monomer unit derived from an α-olefin having 3 or more carbon atoms. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene and 1-dodecene.
表層におけるエチレン−α−オレフィン共重合体の密度は、８９０ｋｇ／ｍ３以上９４０ｋｇ／ｍ３以下であり、密着性を良好なものにするために、好ましくは８９０ｋｇ／ｍ３以上９３０ｋｇ／ｍ３以下であり、より好ましくは８９０ｋｇ／ｍ３以上９２０ｋｇ／ｍ３以下である。密度はＪＩＳ Ｋ７１１２−１９８０のうちＡ法に規定された方法に従って測定される。なお、試料は、ＪＩＳ Ｋ６７６０−１９９５に記載のアニーリングを行う。 The density of the ethylene -α- olefin copolymer in the surface layer is not more than 890 kg / m 3 or more 940 kg / m 3, to adhesion to obtain favorable preferably 890 kg / m 3 or more 930 kg / m 3 or less More preferably, it is 890 kg / m 3 or more and 920 kg / m 3 or less. The density is measured according to the method defined in Method A of JIS K7112-1980. The sample is annealed according to JIS K6760-1995.
エチレン−不飽和エステル共重合体とは、エチレンに由来する単量体単位と不飽和エステルに由来する単量体単位とを含む共重合体である。
不飽和エステルとしては、例えば、酢酸ビニル、α，β−不飽和カルボン酸アルキルエステル等が挙げられる。α，β−不飽和カルボン酸アルキルエステルとしては、アクリル酸メチル、アクリル酸エチル、アクリル酸ｎ−プロピル、アクリル酸イソプロピル、アクリル酸ｎ−ブチル、アクリル酸ｔ−ブチル、アクリル酸イソブチル、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ｎ−プロピル、メタクリル酸イソプロピル、メタクリル酸ｎ−ブチル、メタクリル酸ｔ−ブチル、メタクリル酸イソブチル等が挙げられる。不飽和エステルとしては、酢酸ビニル、アクリル酸メチル、アクリル酸エチル、アクリル酸ｎ−ブチル、メタクリル酸メチルが好ましい。
An ethylene-unsaturated ester copolymer is a copolymer containing a monomer unit derived from ethylene and a monomer unit derived from an unsaturated ester.
Examples of the unsaturated ester include vinyl acetate and α, β-unsaturated carboxylic acid alkyl ester. Examples of α, β-unsaturated carboxylic acid alkyl esters include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, and methyl methacrylate. , Ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, isobutyl methacrylate and the like. As the unsaturated ester, vinyl acetate, methyl acrylate, ethyl acrylate, n-butyl acrylate, and methyl methacrylate are preferable.
表層におけるエチレン−不飽和エステル共重合体の密度は、９２０ｋｇ／ｍ３以上９５０ｋｇ／ｍ３以下であり、耐熱性を良好なものにするために、好ましくは９２０ｋｇ／ｍ３以上９４０ｋｇ／ｍ３以下である。密度はＪＩＳ Ｋ７１１２−１９８０のうちＡ法に規定された方法に従って測定される。なお、試料は、ＪＩＳ Ｋ６７６０−１９９５に記載のアニーリングを行う。 The density of the ethylene-unsaturated ester copolymer in the surface layer is 920 kg / m 3 or more and 950 kg / m 3 or less, and preferably 920 kg / m 3 or more and 940 kg / m 3 or less in order to improve heat resistance. It is. The density is measured according to the method defined in Method A of JIS K7112-1980. The sample is annealed according to JIS K6760-1995.
表層におけるエチレン系共重合体のビカット軟化点は、６０℃以上１２０℃以下であり、耐熱性および密着性を良好なものにするために、好ましくは６５℃以上１２０℃以下であり、より好ましくは７０℃以上１２０℃以下である。ビカット軟化点はＪＩＳ Ｋ７２０６−１９９１のうちＡ５０法に規定された方法に従い、荷重１０Ｎ、昇温速度５０℃／ｈの条件で測定される。 The Vicat softening point of the ethylene copolymer in the surface layer is 60 ° C. or higher and 120 ° C. or lower, and preferably 65 ° C. or higher and 120 ° C. or lower in order to improve heat resistance and adhesion. It is 70 degreeC or more and 120 degrees C or less. The Vicat softening point is measured under the conditions of a load of 10 N and a temperature increase rate of 50 ° C./h according to the method defined in the A50 method of JIS K7206-1991.
表層におけるエチレン系共重合体のメルトフローレートは、０．０１ｇ／１０分以上３０ｇ／１０分以下であり、好ましくは０．1ｇ／１０分以上２５ｇ／１０分以下であり、より好ましくは０．５ｇ／１０分以上２０ｇ／１０分以下である。メルトフローレートはＪＩＳ Ｋ７２１０−１９９５に規定された方法に従い、荷重２．１６ｋｇ、温度１９０℃の条件で測定される。 The melt flow rate of the ethylene copolymer in the surface layer is from 0.01 g / 10 min to 30 g / 10 min, preferably from 0.1 g / 10 min to 25 g / 10 min, more preferably from 0.00 g / 10 min. It is 5 g / 10 min or more and 20 g / 10 min or less. The melt flow rate is measured under the conditions of a load of 2.16 kg and a temperature of 190 ° C. according to the method defined in JIS K7210-1995.
エチレン−不飽和エステル共重合体の製造方法としては、例えば、スラリー重合法、溶液重合法、塊状重合法、気相重合法等が挙げられる。 Examples of the method for producing the ethylene-unsaturated ester copolymer include a slurry polymerization method, a solution polymerization method, a bulk polymerization method, and a gas phase polymerization method.
表層は、上記のエチレン系共重合体以外に、エチレン系樹脂や各種添加剤を含んでいてもよい。エチレン系樹脂としては、ポリエチレン、エチレン−α−オレフィン共重合体、エチレン−不飽和エステル共重合体等が挙げられる。各種添加剤としては、顔料等の着色剤や酸化防止剤、光安定剤、紫外線吸収剤、難燃剤、帯電防止剤、滑剤、抗ブロッキング剤、無機フィラー、耐水剤、撥水剤、抗菌剤、加工助剤（ワックス等）等が挙げられる。 The surface layer may contain an ethylene resin and various additives in addition to the ethylene copolymer. Examples of the ethylene resin include polyethylene, ethylene-α-olefin copolymer, ethylene-unsaturated ester copolymer, and the like. Various additives include colorants such as pigments, antioxidants, light stabilizers, ultraviolet absorbers, flame retardants, antistatic agents, lubricants, antiblocking agents, inorganic fillers, water resistant agents, water repellents, antibacterial agents, And processing aids (wax etc.).
基材層は、さらに表層を有していてもよい。さらに表層を有する場合、表層／芯層／表層の順に積層していることが好ましい。 The base material layer may further have a surface layer. Furthermore, when it has a surface layer, it is preferable to laminate | stack in order of a surface layer / core layer / surface layer.
基材層の４０％伸長時応力（Ｎ／２５ｍｍ）は、１５Ｎ／２５ｍｍ以下であり、好ましくは１４Ｎ／２５ｍｍ以下であり、より好ましくは１３Ｎ／２５ｍｍ以下である。４０％伸長時応力とは、ＪＩＳ Ｋ６７３２に準拠して、２３℃の雰囲気下で試験速度１０００ｍｍ／分で引っ張り、標線間距離の４０％伸長した時の応力である。 The 40% elongation stress (N / 25 mm) of the base material layer is 15 N / 25 mm or less, preferably 14 N / 25 mm or less, more preferably 13 N / 25 mm or less. The 40% elongation stress refers to the stress when stretched at a test speed of 1000 mm / min in an atmosphere of 23 ° C. and stretched by 40% of the distance between marked lines in accordance with JIS K6732.
基材層の破断点伸度は、２００％以上であり、好ましくは３００％以上であり、より好ましくは４００％以上であり、さらに好ましくは５００％以上である。破断点伸度は、ＪＩＳ Ｋ６７３２に準拠して、２３℃の雰囲気下で試験速度１０００ｍｍ／分で引っ張り、破断するまで伸長して測定される。 The elongation at break of the base material layer is 200% or more, preferably 300% or more, more preferably 400% or more, and further preferably 500% or more. The elongation at break is measured in accordance with JIS K6732 by pulling at a test speed of 1000 mm / min under an atmosphere of 23 ° C. and stretching until breaking.
基材層の厚みは、３０μｍ以上１０００μｍ以下であり、好ましくは４０μｍ以上５００μｍ以下であり、より好ましくは５０μｍ以上２５０μｍ以下である。 The thickness of the base material layer is 30 μm or more and 1000 μm or less, preferably 40 μm or more and 500 μm or less, and more preferably 50 μm or more and 250 μm or less.
基材層の、２つの表層の合計の厚みに対する芯層の厚みの比が、１以上１０以下であり、好ましくは１以上７．５以下であり、より好ましくは１以上５以下である（ただし、２つの表層の合計の厚みを１とする）。 The ratio of the thickness of the core layer to the total thickness of the two surface layers of the base material layer is 1 or more and 10 or less, preferably 1 or more and 7.5 or less, more preferably 1 or more and 5 or less (however, The total thickness of the two surface layers is 1.)
［粘着層］
粘着層とは、粘着剤を含有する層である。
[Adhesive layer]
An adhesive layer is a layer containing an adhesive.
本発明における粘着層にかかる粘着剤は、粘着テープの分野において公知の粘着剤であってもよい。粘着剤としてアクリル系粘着剤、ビニルエーテル系粘着剤、シリコン系粘着剤、ゴム系粘着剤等を例示し得る。粘着剤の形態も特に制限されず、溶液型粘着剤、エマルジョン型粘着剤、ホットメルト型粘着剤等のどの型のものでもよい。
粘着剤は、粘着性成分等のポリマー成分の他に、各種添加剤を含んでいてもよい。各種添加剤の例として、粘着剤の種類等に応じて、架橋剤、粘着付与剤、可塑剤、充填剤、老化防止剤等が挙げられる。
The pressure-sensitive adhesive applied to the pressure-sensitive adhesive layer in the present invention may be a pressure-sensitive adhesive known in the field of pressure-sensitive adhesive tapes. Examples of the pressure-sensitive adhesive include acrylic pressure-sensitive adhesives, vinyl ether-based pressure-sensitive adhesives, silicon-based pressure-sensitive adhesives, and rubber-based pressure-sensitive adhesives. The form of the pressure-sensitive adhesive is not particularly limited, and may be any type such as a solution-type pressure-sensitive adhesive, an emulsion-type pressure-sensitive adhesive, and a hot-melt type pressure-sensitive adhesive.
The pressure-sensitive adhesive may contain various additives in addition to a polymer component such as a pressure-sensitive adhesive component. Examples of various additives include cross-linking agents, tackifiers, plasticizers, fillers, anti-aging agents, and the like, depending on the type of pressure-sensitive adhesive.
［粘着テープ］
本発明の粘着テープは、基材層と粘着層を有している。
[Adhesive tape]
The pressure-sensitive adhesive tape of the present invention has a base material layer and a pressure-sensitive adhesive layer.
基材層の上に粘着層を形成する方法としては、粘着剤を基材層の上に塗布する方法や、粘着剤を剥離紙の上に塗布した後、その剥離紙を基材層と貼り合わせる方法が挙げられる。粘着剤を基材層または剥離紙の上に塗布する方法としては、例えばロールコーター法等の公知の方法が挙げられる。剥離紙としては、シリコン離型処理した上質紙、グラシン紙等の紙基材や、ポリエステルフィルム等が挙げられる。
基材層の面は、基材層と粘着剤との親和性を高めるために、必要に応じて、コロナ放電処理やプライマー処理されてもよい。
粘着剤を塗布する面とは反対側の基材層の面に、粘着テープの性能を保護するため、必要に応じて、剥離剤を塗布してもよい。剥離剤は特に制限されず、当該分野において従来から公知の剥離剤であってもよい。剥離剤としては、例えば、長鎖アルキル系、シリコン系の剥離剤等が挙げられる。
粘着剤層の厚さは、粘着テープのサイズ（基材層の幅や厚さ）や用途等に応じて適宜決めればよい。粘着層の厚みとしては、１０μｍ〜３００μｍが好ましい。
The adhesive layer can be formed on the base material layer by applying an adhesive on the base material layer, or after applying the adhesive on the release paper and pasting the release paper on the base material layer. The method to match is mentioned. Examples of the method for applying the pressure-sensitive adhesive on the base material layer or release paper include known methods such as a roll coater method. Examples of the release paper include paper base materials such as high-quality paper and glassine paper subjected to silicon release treatment, and polyester films.
The surface of the base material layer may be subjected to corona discharge treatment or primer treatment as necessary in order to increase the affinity between the base material layer and the pressure-sensitive adhesive.
In order to protect the performance of the pressure-sensitive adhesive tape on the surface of the base material layer opposite to the surface on which the pressure-sensitive adhesive is applied, a release agent may be applied as necessary. The release agent is not particularly limited, and may be a release agent conventionally known in the art. Examples of the release agent include long-chain alkyl type and silicon type release agents.
The thickness of the pressure-sensitive adhesive layer may be appropriately determined according to the size of the pressure-sensitive adhesive tape (the width and thickness of the base material layer), the application, and the like. The thickness of the adhesive layer is preferably 10 μm to 300 μm.
本発明の粘着テープは、耐熱性に優れており、曲面や凹凸の複雑な形状を有する部位においても良好に密着する。したがって、医療用、包装用、マスキング用、表面保護用、建築・建材用として、好適に使用することができる。特に、建築・建材用として好適に使用することができ、例えば、気密性が求められる建築部材間の境界部に使用することができる。 The pressure-sensitive adhesive tape of the present invention is excellent in heat resistance and adheres well even at sites having complicated shapes such as curved surfaces and irregularities. Therefore, it can be suitably used for medical use, packaging use, masking use, surface protection use, and construction / building material use. In particular, it can be suitably used for construction and building materials, and can be used, for example, at a boundary portion between building members that require airtightness.
以下、実施例によって本発明を更に詳細に説明するが、本発明はこれら実施例によってその範囲を限定されるものではない。
実施例および比較例に示した物性の測定方法は以下の通りである。
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited the range by these Examples.
The measuring method of the physical property shown in the Example and the comparative example is as follows.
［ビカット軟化点（単位：℃）］
ビカット軟化点は、ＪＩＳ Ｋ７２０６−１９９１のうちＡ５０法に規定された方法に従い、荷重１０Ｎ、昇温速度５０℃／ｈの条件で測定した。
[Vicat softening point (unit: ° C)]
The Vicat softening point was measured under the conditions of a load of 10 N and a temperature increase rate of 50 ° C./h according to the method defined in the A50 method of JIS K7206-1991.
［密度（単位：ｋｇ／ｍ３）］
密度は、ＪＩＳ Ｋ７１１２−１９８０のうちＡ法に規定された方法に従って測定した。なお、試料には、ＪＩＳ Ｋ６７６０−１９９５に記載のアニーリングを行った。
[Density (Unit: kg / m 3 )]
The density was measured according to the method defined in Method A of JIS K7112-1980. The sample was annealed according to JIS K6760-1995.
［メルトフローレート（ＭＦＲ）（単位：ｇ／１０分）］
メルトフローレートは、ＪＩＳ Ｋ７２１０−１９９５に規定された方法に従い、荷重２．１６ｋｇ、温度１９０℃の条件で測定した。
[Melt flow rate (MFR) (unit: g / 10 min)]
The melt flow rate was measured under the conditions of a load of 2.16 kg and a temperature of 190 ° C. according to the method defined in JIS K7210-1995.
［破断点伸度（単位：％）］
破断点伸度は、ＪＩＳ Ｋ６７３２に準拠して、２３℃の雰囲気下で試験速度１０００ｍｍ／分で引っ張り、破断するまで伸長して測定した。
なお、試験片はフィルムの加工方向（ＭＤ）と垂直方向（ＴＤ）に切り出したものを用いた。
[Elongation at break (unit:%)]
The elongation at break was measured in accordance with JIS K6732 by pulling at a test speed of 1000 mm / min under an atmosphere of 23 ° C. and stretching until breaking.
In addition, the test piece used what was cut out in the processing direction (MD) and the perpendicular direction (TD) of the film.
［４０％伸長時応力（単位：Ｎ／２５ｍｍ）］
４０％伸長時応力は、ＪＩＳ Ｋ６７３２に準拠して、２３℃の雰囲気下で試験速度１０００ｍｍ／分で引っ張り、標線間距離の４０％伸長して測定した。
なお、試験片はフィルムの加工方向（ＭＤ）と垂直方向（ＴＤ）に切り出したものを用いた。
[40% elongation stress (unit: N / 25mm)]
The stress at 40% elongation was measured in accordance with JIS K6732 by pulling at a test speed of 1000 mm / min under an atmosphere of 23 ° C. and stretching 40% of the distance between marked lines.
In addition, the test piece used what was cut out in the processing direction (MD) and the perpendicular direction (TD) of the film.
［耐熱性］
長さ２００ｍｍ、幅1００ｍｍの基材層を２枚重ね、荷重５ｋｇの力を加えて、６０℃雰囲気下で７２時間静置した。次に、長さ２００ｍｍ、幅２５ｍｍの大きさになるようにカットし、２３℃雰囲気下、引張試験機を用いて、フィルム表層同士を長手方向に３００ｍｍ／分で９０°剥離したときの剥離力（Ｎ／２５ｍｍ）を測定した。上記条件で剥離したときに、剥離力が０〜１０Ｎ／２５ｍｍであるものを良好とし、剥離不可で、剥離力を測定できなかったものを不良とした。
[Heat-resistant]
Two base material layers having a length of 200 mm and a width of 100 mm were stacked, applied with a load of 5 kg, and allowed to stand in a 60 ° C. atmosphere for 72 hours. Next, the film was cut to have a length of 200 mm and a width of 25 mm, and the peel force when the film surface layers were peeled 90 ° at 300 mm / min in the longitudinal direction using a tensile tester in a 23 ° C. atmosphere. (N / 25 mm) was measured. When it peeled on the said conditions, the thing whose peeling force is 0-10 N / 25mm was made favorable, and the thing which was not able to peel and was not able to measure peeling force was made into defect.
［密着性］
３００ｍｍ角の合板の上に１６５φの円柱を置き、その合板と円柱の境目に、粘着テープを沿わせながら貼り付けたときの、粘着テープのシワのあり／なしを観察した。シワが無ければ良好とし、シワが有れば不良とした。
[Adhesion]
A 165φ cylinder was placed on a 300 mm square plywood, and the presence or absence of wrinkles of the adhesive tape was observed when the adhesive tape was stuck along the boundary between the plywood and the cylinder. If there was no wrinkle, it was judged as good, and if there was a wrinkle, it was judged as bad.
＜実施例１＞
表層用組成物として、エチレン−酢酸ビニル共重合体（住友化学（株）製Ｈ２０２０、密度：９４０ｋｇ／ｍ３、ビカット軟化点：６５℃、ＭＦＲ：１．５ｇ／１０分）１００重量部と、酸化防止剤マスターバッチ（住友化学（株）製ＣＭＢ−７３５）２．５重量部を、芯層用組成物として、エチレン−１−オクテン共重合体（デュポンダウ（株）製ＥＧ８８４２、密度：８５７ｋｇ／ｍ３、ＭＦＲ：１．０ｇ／１０分）１００重量部と、酸化防止剤マスターバッチ（住友化学（株）製ＣＭＢ−７３５）２．５重量部を、ＳＨＩモダンマシナリー（株）製３層共押出Ｔダイフィルム加工機の表層用押出機、反対面の表層用押出機、中間層用押出機へそれぞれ供給し、ダイス温度２３０℃で共押出し、引取速度５ｍ／分の条件で製膜して、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／８／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表１に示した。
<Example 1>
As a surface layer composition, ethylene-vinyl acetate copolymer (Sumitomo Chemical Co., Ltd. H2020, density: 940 kg / m 3 , Vicat softening point: 65 ° C., MFR: 1.5 g / 10 min), 100 parts by weight, Antioxidant masterbatch (Sumitomo Chemical Co., Ltd. CMB-735) 2.5 parts by weight as the core layer composition, ethylene-1-octene copolymer (Du Pont Dow Co., Ltd. EG8842, density: 857 kg / M 3 , MFR: 1.0 g / 10 min) 100 parts by weight and antioxidant masterbatch (CMB-735 manufactured by Sumitomo Chemical Co., Ltd.) 2.5 parts by weight, 3 layers manufactured by SHI Modern Machinery Co., Ltd. Co-extrusion T Supply to the surface layer extruder of the die film processing machine, surface layer extruder on the opposite side, and intermediate layer extruder, co-extrusion at a die temperature of 230 ° C, and film formation under conditions of a take-up speed of 5 m / min. All A film having a body thickness of 130 μm and a thickness ratio of each layer of surface layer / core layer / surface layer = 1/8/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 1.
＜実施例２＞
表層用組成物として、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＶ１０３、密度：９０４ｋｇ／ｍ３、ビカット軟化点：８３℃、ＭＦＲ：１．３ｇ／１０分）１００重量部を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／５／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表１に示した。
<Example 2>
As a composition for the surface layer, 100 parts by weight of an ethylene-1-hexene copolymer (FV103 manufactured by Sumitomo Chemical Co., Ltd., density: 904 kg / m 3 , Vicat softening point: 83 ° C., MFR: 1.3 g / 10 min) A film having an overall thickness of 130 μm and a ratio of the thicknesses of the respective layers of surface layer / core layer / surface layer = 1/5/1 was produced in the same manner as in Example 1 except that it was used.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 1.
＜実施例３＞
表層用組成物として、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＶ２０３、密度：９１３ｋｇ／ｍ３、ビカット軟化点：９９℃、ＭＦＲ：２．０ｇ／１０分）１００重量部を、芯層用組成物として、エチレン−プロピレン共重合体（住友化学（株）製Ｖ０１３２、密度：８６５ｋｇ／ｍ３、ＭＦＲ：１．６ｇ／１０分）１００重量部を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／５／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表１に示した。
<Example 3>
As a composition for the surface layer, 100 parts by weight of an ethylene-1-hexene copolymer (FV203 manufactured by Sumitomo Chemical Co., Ltd., density: 913 kg / m 3 , Vicat softening point: 99 ° C., MFR: 2.0 g / 10 min) In addition, as the composition for the core layer, Examples were used except that 100 parts by weight of an ethylene-propylene copolymer (V0132 manufactured by Sumitomo Chemical Co., Ltd., density: 865 kg / m 3 , MFR: 1.6 g / 10 min) was used. In the same manner as in Example 1, a film having an overall thickness of 130 μm and a thickness ratio of each layer of surface layer / core layer / surface layer = 1/5/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 1.
＜実施例４＞
表層用組成物として、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＶ４０１、密度：９０４ｋｇ／ｍ３、ビカット軟化点：８１℃、ＭＦＲ：３．８ｇ／１０分）１００重量部を、芯層用組成物として、エチレン−１−オクテン共重合体（デュポンダウ（株）製ＥＧ８２００、密度：８７０ｋｇ／ｍ３、ＭＦＲ：５．０ｇ／１０分）１００重量部を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／７／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表１に示した。
<Example 4>
As a composition for the surface layer, 100 parts by weight of an ethylene-1-hexene copolymer (FV401 manufactured by Sumitomo Chemical Co., Ltd., density: 904 kg / m 3 , Vicat softening point: 81 ° C., MFR: 3.8 g / 10 min) As the composition for the core layer, except that 100 parts by weight of an ethylene-1-octene copolymer (EG8200 manufactured by DuPont Dow Co., Ltd., density: 870 kg / m 3 , MFR: 5.0 g / 10 min) is used, In the same manner as in Example 1, a film having an overall thickness of 130 μm and a thickness ratio of each layer of surface layer / core layer / surface layer = 1/7/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 1.
＜実施例５＞
表層用組成物として、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＶ１０３、密度：９０４ｋｇ／ｍ３、ビカット軟化点：８３℃、ＭＦＲ：１．３ｇ／１０分）１００重量部と、酸化防止剤マスターバッチ（住友化学（株）製ＣＭＢ−７３５）２．５重量部を、芯層用組成物として、エチレン−１−オクテン共重合体（デュポンダウ（株）製ＥＧ８８４２、密度：８５７ｋｇ／ｍ３、ＭＦＲ：１．０ｇ／１０分）１００重量部と、酸化防止剤マスターバッチ（住友化学（株）製ＣＭＢ−７３５）２．５重量を、（株）プラコー製多層共押出インフレーションフィルム加工機の表層用押出機、反対面の表層用押出機、中間層用押出機へそれぞれ供給し、これらの材料をダイス温度１８０℃、ブロー比２．０で共押出し、引取速度４ｍ／分の条件で製膜し、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／２／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表２に示した。
<Example 5>
As a composition for the surface layer, 100 parts by weight of an ethylene-1-hexene copolymer (FV103 manufactured by Sumitomo Chemical Co., Ltd., density: 904 kg / m 3 , Vicat softening point: 83 ° C., MFR: 1.3 g / 10 minutes) , 2.5 parts by weight of an antioxidant masterbatch (CMB-735 manufactured by Sumitomo Chemical Co., Ltd.) as a composition for the core layer, an ethylene-1-octene copolymer (EG8842 manufactured by DuPont Dow Co., Ltd., density: 857 kg / m 3 , MFR: 1.0 g / 10 min) 100 parts by weight and antioxidant masterbatch (CMB-735 manufactured by Sumitomo Chemical Co., Ltd.) 2.5 parts by weight These are fed to the surface layer extruder, the opposite surface layer extruder, and the intermediate layer extruder of the film processing machine, and these materials are coextruded at a die temperature of 180 ° C. and a blow ratio of 2.0. Films were formed under the conditions of m / min, and a film having a total thickness of 130 μm and a ratio of the thicknesses of the respective layers of surface layer / core layer / surface layer = 1/2/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 2.
＜実施例６＞
各層の厚み比を表層／芯層／表層＝１／３／１とした以外は、実施例５と同様にして、全体の厚みが１３０μｍのフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表２に示した。
<Example 6>
A film having a total thickness of 130 μm was produced in the same manner as in Example 5 except that the thickness ratio of each layer was changed to surface layer / core layer / surface layer = 1/3/1.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 2.
＜比較例１＞
表層用組成物として、エチレン−酢酸ビニル共重合体（住友化学（株）製ＫＡ４０、密度：９５０ｋｇ／ｍ３、ビカット軟化点：３９℃、ＭＦＲ：２０ｇ／１０分）１００重量部を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／８／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表２に示した。
<Comparative Example 1>
Except for using 100 parts by weight of an ethylene-vinyl acetate copolymer (KA40, manufactured by Sumitomo Chemical Co., Ltd., density: 950 kg / m 3 , Vicat softening point: 39 ° C., MFR: 20 g / 10 min) as the surface layer composition. In the same manner as in Example 1, a film having an overall thickness of 130 μm and a thickness ratio of each layer of surface layer / core layer / surface layer = 1/8/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 2.
＜比較例２＞
表層用組成物として、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＶ２０３、密度：９１３ｋｇ／ｍ３、ビカット軟化点：９９℃、ＭＦＲ：２．０ｇ／１０分）１００重量部を、芯層用組成物として、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＸ２０１、密度：８９８ｋｇ／ｍ３、ＭＦＲ：２．０ｇ／１０分）１００重量部を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／５／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表２に示した。
<Comparative Example 2>
As a composition for the surface layer, 100 parts by weight of an ethylene-1-hexene copolymer (FV203 manufactured by Sumitomo Chemical Co., Ltd., density: 913 kg / m 3 , Vicat softening point: 99 ° C., MFR: 2.0 g / 10 min) As the composition for the core layer, except that 100 parts by weight of an ethylene-1-hexene copolymer (FX201 manufactured by Sumitomo Chemical Co., Ltd., density: 898 kg / m 3 , MFR: 2.0 g / 10 min) is used, In the same manner as in Example 1, a film having an overall thickness of 130 μm and a thickness ratio of each layer of surface layer / core layer / surface layer = 1/5/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. The physical properties of the obtained film and the evaluation results of the obtained adhesive tape are shown in Table 2.
＜比較例３＞
表層用組成物と、芯層用組成物の両方に、エチレン−１−ヘキセン共重合体（住友化学（株）製ＦＶ４０１、密度：９０４ｋｇ／ｍ３、ビカット軟化点：８１℃、ＭＦＲ：３．８ｇ／１０分）１００重量部を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍの単層フィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表３に示した。
<Comparative Example 3>
In both the surface layer composition and the core layer composition, an ethylene-1-hexene copolymer (FV401 manufactured by Sumitomo Chemical Co., Ltd., density: 904 kg / m 3 , Vicat softening point: 81 ° C., MFR: 3. (8 g / 10 min) A single layer film having a total thickness of 130 μm was produced in the same manner as in Example 1 except that 100 parts by weight were used.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. Table 3 shows the physical properties of the obtained film and the evaluation results of the obtained adhesive tape.
＜比較例４＞
表層用組成物として、高密度ポリエチレン（日本ポリエチレン（株）製ＨＹ５４０、密度：９６０ｋｇ／ｍ３、ビカット軟化点：１２９℃、ＭＦＲ：１．０ｇ／１０分）１００重量を用いた以外は、実施例１と同様にして、全体の厚みが１３０μｍであり、各層の厚みの比が表層／芯層／表層＝１／７／１であるフィルムを作製した。
得られたフィルムの片面を、濡れ指数が３８ｄｙｎ／ｃｍ以上になるようにコロナ処理し、処理した面にアクリル系粘着剤を、乾燥後の粘着層の厚みが１２０μｍとなるように塗布し、粘着テープを作製した。得られたフィルムの物性と、得られた粘着テープの評価結果を表３に示した。
<Comparative example 4>
Implementation was performed except that 100 weights of high density polyethylene (HY540 manufactured by Nippon Polyethylene Co., Ltd., density: 960 kg / m 3 , Vicat softening point: 129 ° C., MFR: 1.0 g / 10 min) was used as the surface layer composition. In the same manner as in Example 1, a film having an overall thickness of 130 μm and a thickness ratio of each layer of surface layer / core layer / surface layer = 1/7/1 was produced.
One side of the obtained film was subjected to corona treatment so that the wetting index was 38 dyn / cm or more, and an acrylic pressure-sensitive adhesive was applied to the treated surface so that the thickness of the pressure-sensitive adhesive layer after drying was 120 μm. A tape was prepared. Table 3 shows the physical properties of the obtained film and the evaluation results of the obtained adhesive tape.
Claims (3)
前記基材層が、芯層と表層を有する層であり、
前記芯層が、密度８５０ｋｇ／ｍ３以上８９０ｋｇ／ｍ３以下のエチレン−α−オレフィン共重合体を含む層であり、
前記芯層の引張最大点応力が、３５Ｍｐａ以下であり、
前記表層が、ビカット軟化点が６０℃以上１２０℃以下であるエチレン系共重合体を含む層であり、
前記基材層２枚を、その表層同士が対向するように重ね合わせ、荷重５ｋｇの力を加えて、６０℃雰囲気下で７２時間静置した後に、２３℃雰囲気下、引張試験機を用いて、フィルム表層同士を長手方向に３００ｍｍ／分で９０°剥離したときの剥離力が、０〜１０Ｎ／２５ｍｍであり、
前記基材層が、さらに前記表層を有し、表層／芯層／表層の順に積層しており、
ＪＩＳ Ｋ６７３２に準拠して、２３℃の雰囲気下で試験速度１０００ｍｍ／分で引っ張り、標線間距離の４０％伸長したときの前記基材層の４０％伸長時応力が、１５Ｎ／２５ｍｍ以下である粘着テープ。 Having a base material layer and an adhesive layer,
The base material layer is a layer having a core layer and a surface layer,
The core layer is a layer containing an ethylene-α-olefin copolymer having a density of 850 kg / m 3 or more and 890 kg / m 3 or less,
The tensile maximum point stress of the core layer is 35 Mpa or less,
The surface layer is a layer containing an ethylene copolymer having a Vicat softening point of 60 ° C. or higher and 120 ° C. or lower,
The two base material layers are overlapped so that the surface layers face each other, a force of 5 kg is applied, and the mixture is allowed to stand in a 60 ° C. atmosphere for 72 hours, and then in a 23 ° C. atmosphere using a tensile tester. , peel force after the 90 ° peel at 300 mm / min the film surface together longitudinally, Ri 0~10N / 25mm der,
The base material layer further has the surface layer, and is laminated in the order of surface layer / core layer / surface layer ,
In accordance with JIS K6732, the substrate layer has a 40% elongation stress of 15 N / 25 mm or less when pulled at a test speed of 1000 mm / min in an atmosphere at 23 ° C. and stretched by 40% of the distance between marked lines. Adhesive tape.
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| JP2014072878A JP6450080B2 (en) | 2014-03-31 | 2014-03-31 | Adhesive tape |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5871975A (en) * | 1981-10-23 | 1983-04-28 | Mitsubishi Plastics Ind Ltd | Base material for flexible adhesive tape |
| JP2983729B2 (en) * | 1991-10-24 | 1999-11-29 | 古河電気工業株式会社 | Adhesive tape for fixing semiconductor wafers |
| US5614297A (en) * | 1994-05-19 | 1997-03-25 | Viskase Corporation | Polyolefin stretch film |
| AU1055401A (en) * | 1999-11-08 | 2001-06-06 | Sumiron Co., Ltd | Film of laminated structure with excellent conformability to three-dimensional shape and use thereof |
| JP2002317158A (en) * | 2001-04-18 | 2002-10-31 | Sekisui Chem Co Ltd | Adhesive tape for seal |
| JP5457745B2 (en) * | 2008-07-15 | 2014-04-02 | サン・トックス株式会社 | Base film |
| JP2011054610A (en) * | 2009-08-31 | 2011-03-17 | Dainippon Printing Co Ltd | Thermal conductive sheet and method of manufacturing the same |
| JP5883617B2 (en) * | 2011-11-09 | 2016-03-15 | 日東電工株式会社 | Adhesive sheet with separator |
| JP2013166832A (en) * | 2012-02-15 | 2013-08-29 | Nitto Denko Corp | Surface-protecting sheet |
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