JP2013095066A - Linear polyethylene film - Google Patents
Linear polyethylene film Download PDFInfo
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- JP2013095066A JP2013095066A JP2011240327A JP2011240327A JP2013095066A JP 2013095066 A JP2013095066 A JP 2013095066A JP 2011240327 A JP2011240327 A JP 2011240327A JP 2011240327 A JP2011240327 A JP 2011240327A JP 2013095066 A JP2013095066 A JP 2013095066A
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- linear polyethylene
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- heat seal
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- -1 polyethylene Polymers 0.000 title claims abstract description 69
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 60
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 60
- 239000000314 lubricant Substances 0.000 claims abstract description 77
- 239000002245 particle Substances 0.000 claims abstract description 66
- 239000010954 inorganic particle Substances 0.000 claims abstract description 29
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 22
- 239000011146 organic particle Substances 0.000 claims abstract description 19
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 15
- 239000000194 fatty acid Substances 0.000 claims abstract description 15
- 229930195729 fatty acid Natural products 0.000 claims abstract description 15
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 238000007639 printing Methods 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 17
- 239000003086 colorant Substances 0.000 claims description 10
- 230000001788 irregular Effects 0.000 claims description 10
- 238000010030 laminating Methods 0.000 claims description 10
- 238000003475 lamination Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 abstract description 41
- 238000005507 spraying Methods 0.000 abstract description 19
- 238000004804 winding Methods 0.000 abstract description 16
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 32
- 238000007789 sealing Methods 0.000 description 20
- 239000000047 product Substances 0.000 description 19
- 230000000903 blocking effect Effects 0.000 description 16
- 238000004806 packaging method and process Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 238000011049 filling Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 230000001954 sterilising effect Effects 0.000 description 10
- 238000004659 sterilization and disinfection Methods 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000011109 contamination Methods 0.000 description 8
- 229920002292 Nylon 6 Polymers 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 7
- 230000032683 aging Effects 0.000 description 7
- 230000007774 longterm Effects 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 230000004927 fusion Effects 0.000 description 6
- 239000000976 ink Substances 0.000 description 6
- 238000002386 leaching Methods 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000005909 Kieselgur Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
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- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 238000013508 migration Methods 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
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- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
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- 239000011888 foil Substances 0.000 description 2
- 239000005001 laminate film Substances 0.000 description 2
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- 229920000728 polyester Polymers 0.000 description 2
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- FUSNPOOETKRESL-ZPHPHTNESA-N (z)-n-octadecyldocos-13-enamide Chemical compound CCCCCCCCCCCCCCCCCCNC(=O)CCCCCCCCCCC\C=C/CCCCCCCC FUSNPOOETKRESL-ZPHPHTNESA-N 0.000 description 1
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-UHFFFAOYSA-N 0.000 description 1
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- GWFGDXZQZYMSMJ-UHFFFAOYSA-N Octadecansaeure-heptadecylester Natural products CCCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCCCC GWFGDXZQZYMSMJ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
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- 238000007796 conventional method Methods 0.000 description 1
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- 238000003851 corona treatment Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 1
- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- FEEPBTVZSYQUDP-UHFFFAOYSA-N heptatriacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O FEEPBTVZSYQUDP-UHFFFAOYSA-N 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- NKBWPOSQERPBFI-UHFFFAOYSA-N octadecyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCCCC NKBWPOSQERPBFI-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
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- 238000007873 sieving Methods 0.000 description 1
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- 229940037312 stearamide Drugs 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
Description
本発明はヒートシーラントとして現在主流的な位置付けにある線状ポリエチレンを使用した包装体の中で、食品、飲料、医薬品、工業用製品、繊維製品包装など各種の分野において、高速充填包装性、低温シール性を要求しながら矛盾する高温殺菌処理などで求められる耐熱性との両立、非汚染性、安全性、省材料化などの要求を満足できる線状ポリエチレンフィルムに関するものである。 The present invention is a package using linear polyethylene, which is currently mainstream as a heat sealant, in various fields such as food, beverages, pharmaceuticals, industrial products, textile products packaging, high-speed filling packaging properties, low temperature The present invention relates to a linear polyethylene film capable of satisfying the requirements such as compatibility with heat resistance required in high-temperature sterilization treatment contradictory while requiring sealing properties, non-contamination, safety, and material saving.
昨今、高速充填包装、つまり高速ヒートシール性、製品の安全性に対する完全密封シール性、高速充填時に重要なホットタックシール性、非汚染性、内容物保護性、同安全性などが包装分野で強く求められている。これらの種々の要求に対して線状ポリエチレン樹脂は極めて優れた特性対応が可能なために昨今ではヒートシーラントの主流素材となってきた。
このような趨勢の中で低温シール性、高速充填シール性を達成するために低密度線状ポリエチレンが重要視されてきたが、一方では極めて軟質であるために滑性、アンチブロッキング性、多色印刷による滑り、ブロッキング性の悪化、諸種の加工特性が悪く、本問題を解決するために滑剤粉末散布をしている現状から全く滑剤粉末散布をしなくても実用化できるヒートシーラントを提供しようとするものである。
Recently, high-speed filling packaging, that is, high-speed heat sealability, complete hermetic sealability for product safety, hot tack sealability, non-contamination, content protection, and safety that are important for high-speed filling are strong in the packaging field. It has been demanded. In recent years, linear polyethylene resins have become a mainstream material for heat sealants because they can cope with extremely excellent properties in response to these various requirements.
Under these circumstances, low density linear polyethylene has been regarded as important in order to achieve low temperature sealability and high-speed filling sealability, but on the other hand, it is extremely soft so that it is slippery, antiblocking, multicolored. We try to provide a heat sealant that can be put into practical use without spraying lubricant powder at all, from the current situation of spraying lubricant powder to solve this problem due to slippage due to printing, poor blocking properties, and various processing characteristics. To do.
すなわち、高速充填包装においては、低密度線状ポリエチレンを使用されることが常道であるが、低密度ゆえに極めて滑性が悪く、ブロッキング問題も重要な課題である。本課題に対する現状の最も一般的な対応技術は滑剤粉末をフィルム表面に散布する方法である。この滑剤散布により、滑性及びアンチブロッキング性、多色印刷における滑性悪化を解決しているのが現状である。
これらの滑剤散布は過少量では効果が実現せず、過剰量では脱落、展着など不要な汚染、内容物への移行、ヒートシール部への噛み込みによるシール不良、又はヒートシール部に噛み込んだ散布滑剤により、その部分から空気抜けによる密封不良或いは内容物の浸み出し問題、高温殺菌処理時に滑剤粉体物の脱落による袋内面の熱融着がランダムに起こりやすい欠点が生じやすい。また滑剤粉末が容易に脱落するため、清浄度を要求される用途では使用が不可能であり、最も重要な問題点は全平面に滑剤粉末が均一に付着させることは不可能であるため、加熱殺菌処理など高温処理において、ヒートシール面同士が熱融着することを完全には防止することができない。
また、滑剤粉末を使用せずに本課題を解決する提案が各種なされているが、滑性及びアンチブロッキング性を改良する現実的な方法として実用化されている方法は、無機系滑剤、例えば二酸化ケイ素、炭酸カルシウム、球形シリコンなどと有機滑剤などとの併用混合方法が一般的である。
しかし単に無機系滑剤と有機系滑剤の併用混合や粒子のサイズ変更や濃度調節だけでは本課題が解決されるほど簡単なものではない。この方法では完全に滑剤粉末の散布をやめることが困難な場合が多く、現状では、実際的には特に低密度タイプの線状ポリエチレンでは依然として滑剤粉末を散布している現状である。
That is, in high-speed filling packaging, it is usual to use low-density linear polyethylene, but because of the low density, the slipperiness is extremely poor, and the blocking problem is also an important issue. The most common current technology for this problem is a method of spraying lubricant powder on the film surface. The present condition is solving the slipperiness, the anti-blocking property, and the slippage deterioration in multicolor printing by spraying this lubricant.
The application of these lubricants will not be effective if the amount is too small, and if the amount is too large, unnecessary contamination such as dropping or spreading, transfer to contents, poor sealing due to biting into the heat seal part, or biting into the heat seal part will occur. However, the spray lubricant is prone to problems such as poor sealing due to air leakage from the portion or problems of leaching of the contents, and heat fusion of the inner surface of the bag due to falling off of the powder powder during the high temperature sterilization treatment. Also, since the lubricant powder easily falls off, it cannot be used in applications where cleanliness is required, and the most important problem is that the lubricant powder cannot uniformly adhere to all surfaces. In high-temperature treatment such as sterilization treatment, heat sealing surfaces cannot be completely prevented from being heat-sealed.
In addition, various proposals have been made to solve this problem without using a lubricant powder, but a method that has been put into practical use as a practical method for improving the slipperiness and antiblocking property is an inorganic lubricant, for example, dioxide dioxide. A combined mixing method of silicon, calcium carbonate, spherical silicon and the like with an organic lubricant is common.
However, the combined use of inorganic and organic lubricants, particle size changes, and concentration adjustments are not so simple as to solve this problem. In this method, it is often difficult to completely disperse the lubricant powder, and at present, the lubricant powder is still being dispersed, especially in the case of low density type linear polyethylene.
現在上記のような分野における要求事項を満足させるために、例えば高速充填包装では低密度線状ポリエチレンの使用が必須となってきた。
しかしながら低密度タイプの線状ポリエチレン樹脂は滑性が悪く、且つブロッキングを生じやすいなど前記の通りの大きな問題を抱えている。
滑性が悪いとフィルムの巻取性が悪く皺の混入、均一巻取が不可能となり、またブロッキングに関しては巻取ロールを加工時に巻戻す際に巻戻ができなかったり、フィルムが切断したり、或いは巻戻テンションが不同となり印刷、ラミネート加工などが安定して加工できなくなる。
更に最終製品において、包装体の袋の口開きが不可能となり内容物の取り出しが困難になったりする。
またボイル殺菌処理において、袋内部が加熱融着し、製品化ができなくなる。
これらの問題に対して、現在ではフィルムのヒートシール面に滑剤散布が一般的に行われてかかる問題の解決をはかっている状態である。
しかしながら一方では、ヒートシール面は完全シール、完全密封シールが重要な機能であり、かかる異物を使用しなくても実用化できるフィルムが当然ながら重要であることは理の当然である。
滑剤粉末散布で上記の主要課題の一部は解決される場合が多いが、新たに滑剤粉末による包装体のシール部への噛み込みにより、シールが不完全となり内容物の保護性不良、ヒートシール不良、密封不良、更に機械の汚染、環境汚染、掃除の手間など数々の問題が発生する。
更に該滑剤粉末の撒布量の過少散布或いは過剰散布を避けるための調節が重要となり、管理の手間がかかる。また該滑剤は内容物にも展着するので好ましくない。特に食品、医薬品などの安全性の面から滑剤粉末散布をしなくても前記種々の品質要求に対して対応できる線状ポリエチレンフィルムが重要であることは明らかである。
また低密度タイプの線状ポリエチレンフィルムはヒートシール工程において、高温度、高圧条件で行われるために、最内層の樹脂が押出されて、包装体内部に該樹脂体が一部流れ出す問題がある。本発明はこれらの課題に対しても少なくとも２層からなり、優れた滑性、アンチブロッキング性を備えながら、本ヒートシール面と反対側の接着面が長期的、オールシーズンにおいても経時変化がなく安定した高接着性を備え、少なくとも２層からなる本発明複合フィルムの層全体がヒートシール時の加熱、加圧による樹脂流動最小限度にすることができる特徴を有する。
また一方昨今では包装体の美観、表示義務要請、使用方法、安全性表示、食品添加物表示など各種の印刷表記が必要であることから、印刷の多色化が増加している。
昨今環境問題で印刷インクの水性化が進められるものの、有機溶剤系インクほどの使い易さ、生産性などが不十分であることから、依然溶剤系が主流であり、且つラミネートの接着剤も有機溶剤系が主流である。
かかる状況下で低密度タイプ線状ポリエチレンを使用した場合には、これらの印刷インク又は接着剤の添加剤又は溶剤により表面にブリードしたり線状ポリエチレンが膨潤されて滑剤或いはアンチブロッキング剤、安定剤、分散剤、酸化防止剤などの樹脂添加剤のブリード促進を進めるためにフィルムの滑性が著しく悪くなり、例えば袋にした場合、袋同士の滑りが悪くなり、口開きができなくなる。これは上記の通り、多色印刷による弊害である。
本発明はこれらの諸種の課題を滑剤散布せずにクリーンな状態で前記諸種の課題を解決する発明に関する。
本課題を解決するために前記無機系滑剤や有機系滑剤を多量に使用すると滑性は向上し、アンチブロッキング性も向上し、滑剤粉末を散布しなくても実用化ができる滑性及びアンチブロッキング性を実現することは可能である。
しかし弊害としてラミネート強度の低下、特に経時によるラミネート強度低下とヒートシール強度低下が生じるだけでなく透明性の悪化、摩擦によるフィルムのスクラッチ傷がつきやすくなり、内容物との摩擦、フィルム同士の摩擦などで輸送、販売段階において一層透明性が悪化する。本発明はこれらの弊害を全て解決し、必要な特性を実現した安定した品質特性の包装を提供するものである。本発明は滑剤粉末を散布することなく、滑性、アンチブロッキング性に加えて十分なラミネート強度を実現し、経時変化による強度低下がなく、完全密封ヒートシールが得られ、ヒートシール層の加熱加圧による樹脂のはみ出しを最小限度にすると共に、内容物汚染を勿論防止し、清浄環境での使用も可能にするものである。
滑剤粉末の散布が不要であることにより、付着量の管理不要、環境への粉末の飛散、加工設備の汚染防止、内容物の非汚染性と合わせて大きな特徴を有する。
In order to satisfy the requirements in the field as described above, it is indispensable to use low-density linear polyethylene, for example, in high-speed filling packaging.
However, the low density type linear polyethylene resin has the above-mentioned major problems such as poor lubricity and easy blocking.
If the slipperiness is poor, the film can be wound poorly, so that wrinkles can not be mixed in and uniform winding is not possible. Also, with regard to blocking, when the winding roll is rewound during processing, it cannot be rewound, or the film can be cut. Or, the rewind tension is not the same, and printing, laminating, etc. cannot be processed stably.
Furthermore, in the final product, it is impossible to open the bag of the package, making it difficult to take out the contents.
In addition, in the boil sterilization treatment, the inside of the bag is heat-sealed and cannot be commercialized.
In order to solve these problems, lubricant is generally applied to the heat seal surface of the film at present.
However, on the other hand, it is a matter of course that a perfect seal and a complete hermetic seal are important functions for the heat seal surface, and naturally a film that can be put into practical use without using such a foreign substance is important.
In many cases, spraying lubricant powder solves some of the above-mentioned main problems, but new lubricant bites the seal of the package, resulting in incomplete sealing and poor protection of the contents. Numerous problems such as defects, poor sealing, machine contamination, environmental pollution, and cleaning work occur.
Furthermore, it is important to adjust the amount of the lubricant powder so as to avoid under-spraying or over-spreading, and it takes time and effort for management. Moreover, since the lubricant spreads on the contents, it is not preferable. In particular, it is clear that a linear polyethylene film that can meet the above various quality requirements is important from the viewpoint of safety of foods, pharmaceuticals, etc. without spraying lubricant powder.
Further, since the low density type linear polyethylene film is performed under high temperature and high pressure conditions in the heat sealing process, there is a problem that the resin of the innermost layer is extruded and a part of the resin body flows out inside the package. The present invention consists of at least two layers for these problems, and has an excellent sliding property and anti-blocking property, and has a long-term adhesive surface opposite to the heat-sealing surface. The entire layer of the composite film of the present invention having stable high adhesiveness and comprising at least two layers has the characteristic that the resin flow can be minimized by heating and pressurization during heat sealing.
On the other hand, in recent years, various types of printing notations such as aesthetics of packaging, labeling requirements, usage methods, safety indications, food additive indications, and the like have been required.
Recently, printing inks have become water-based due to environmental problems, but solvent-based inks are still the mainstream because organic solvent-based inks are not as easy to use and productivity, and laminate adhesives are also organic. Solvent systems are mainstream.
Under such circumstances, when low density type linear polyethylene is used, lubricants, anti-blocking agents, stabilizers are formed by bleeding or linear polyethylene swelled by the printing ink or adhesive additives or solvents. In order to promote bleeding of resin additives such as dispersants and antioxidants, the slipperiness of the film is remarkably deteriorated. For example, when a bag is formed, slippage between the bags is deteriorated and the mouth cannot be opened. As described above, this is a harmful effect due to multicolor printing.
The present invention relates to an invention for solving these various problems in a clean state without spraying a lubricant.
In order to solve this problem, the use of a large amount of the above-mentioned inorganic lubricants and organic lubricants improves the lubricity, improves the anti-blocking properties, and can be put into practical use without spraying the lubricant powder and anti-blocking. It is possible to realize sex.
However, as a detrimental effect, the laminate strength declines, especially the laminate strength declines over time and the heat seal strength declines, as well as the transparency deteriorates, and the film is easily scratched due to friction. Transparency worsens at the transportation and sales stages. The present invention solves all of these problems and provides a package with stable quality characteristics realizing the necessary characteristics. The present invention achieves a sufficient laminate strength in addition to lubricity and anti-blocking properties without spraying lubricant powder, and does not cause a decrease in strength due to aging. In addition to minimizing the protrusion of the resin due to pressure, the contents are naturally prevented from being contaminated and can be used in a clean environment.
Since it is not necessary to spray lubricant powder, there are significant features in combination with the need for management of the amount of adhesion, scattering of powder to the environment, prevention of contamination of processing equipment, and non-contamination of the contents.
本発明はこれら前記の通りの諸課題に対して、滑剤粉末の散布を必要とせず、低温シール性低密度化線状ポリエチレンフィルムを実現し、多色印刷及び高温使用にも耐える低密度表面を形成する線状ポリエチレンフィルムにより、優れた滑性、アンチブロッキング性、加熱非接着性、優れた巻特性などを付与した包装分野での優れた線状ポリエチレンフィルムを提供することに成功した。
以下これらの優れた特性を実現するための新規な主要技術手段について詳述する。
The present invention does not require the spraying of lubricant powder for these problems as described above, realizes a low-temperature sealable low-density linear polyethylene film, and has a low-density surface that can withstand multicolor printing and high-temperature use. The present invention succeeded in providing an excellent linear polyethylene film in the packaging field to which excellent linearity, anti-blocking property, heat non-adhesiveness, excellent winding properties and the like were imparted by the formed linear polyethylene film.
In the following, new major technical means for realizing these excellent characteristics will be described in detail.
具体的には、本発明の線状ポリエチレンフィルムは、少なくとも２層からなる線状ポリエチレンフィルムにおいて、該フィルムのヒートシール面を構成するヒートシール層が、粒子の平均粒径が５〜１５μｍの範囲にある定形有機系粒子Ａ（以下、単に「粒子Ａ」、「Ａ」という場合がある。）と、粒子の平均粒径が３〜２０μｍの範囲にある不定形無機系粒子Ｂ（以下、単に「粒子Ｂ」、「Ｂ」という場合がある。）と、炭素数が１６以上である成分が６０％以上である脂肪酸アミド系及び／又は脂肪酸エステル系滑剤Ｃ（以下、単に「滑剤Ｃ」、「Ｃ」という場合がある。）とが、ヒートシール層の全量基準で、定形有機系粒子Ａ及び不定形無機系粒子Ｂの合計で３，０００〜７，０００ｐｐｍ、滑剤Ｃが６０〜１，０００ｐｐｍの範囲で混合された線状ポリエチレン樹脂からなり、ヒートシール層（以下、「第１層」という場合がある。）のヒートシール面の反対面に、第２の線状ポリエチレン樹脂層（以下、「第２層」という場合がある。）を有してなることを特徴とする。
ここで、線状ポリエチレン樹脂には、密度は０．８９０〜０．９４０ｇ／ｃｍ３の低密度線状ポリエチレンが選ばれる。この必要性は、低温シール性、高速充填シール性が求められるからである。それゆえに生じる滑り不良、ブロッキング問題、耐熱性不良問題がその要求の裏返しとして生じるという背景にある。
また、不定形無機系粒子Ｂの平均粒径とは、レーザー回折・散乱法に基づくマイクロトラック法により測定した累計粒子分布における５０％点の粒径をいう。
Specifically, the linear polyethylene film of the present invention is a linear polyethylene film composed of at least two layers, and the heat seal layer constituting the heat seal surface of the film has an average particle diameter of 5 to 15 μm. Regular organic particles A (hereinafter sometimes simply referred to as “particles A” and “A”), and irregular inorganic particles B (hereinafter simply referred to as “particles”) having an average particle diameter of 3 to 20 μm. “Particles B” and “B” in some cases), and fatty acid amide-based and / or fatty acid ester-based lubricant C (hereinafter simply referred to as “lubricant C”), in which the component having 16 or more carbon atoms is 60% or more. "C" in some cases) is a total amount of the regular organic particles A and the irregular inorganic particles B on the basis of the total amount of the heat seal layer, 3,000 to 7,000 ppm, and the lubricant C is 60 to 1, In the range of 000 ppm The second linear polyethylene resin layer (hereinafter referred to as “second”) is made of a mixed linear polyethylene resin and is opposite to the heat seal surface of the heat seal layer (hereinafter sometimes referred to as “first layer”). It may be referred to as a “layer”).
Here, a low density linear polyethylene having a density of 0.890 to 0.940 g / cm 3 is selected as the linear polyethylene resin. This is because low-temperature sealing properties and high-speed filling sealing properties are required. For this reason, the slipping, blocking, and heat resistance problems that occur are caused by the reverse of the requirements.
The average particle size of the amorphous inorganic particles B is the particle size at the 50% point in the cumulative particle distribution measured by the microtrack method based on the laser diffraction / scattering method.
この場合において、前記第２の線状ポリエチレン樹脂層を、定形有機系粒子Ａ及び不定形無機系粒子Ｂの合計で０〜１，５００ｐｐｍ、滑剤Ｃが０〜４００ｐｐｍの範囲で混合された線状ポリエチレン樹脂から構成することができる。 In this case, the second linear polyethylene resin layer is a linear mixture in which the total amount of the regular organic particles A and the irregular inorganic particles B is 0 to 1,500 ppm and the lubricant C is mixed in the range of 0 to 400 ppm. It can be composed of a polyethylene resin.
また、ヒートシール層を構成する線状ポリエチレンの密度が０．８９０〜０．９４０ｇ／ｃｍ３の範囲にあり、第２の線状ポリエチレン樹脂層を構成する線状ポリエチレンの密度が０．８９０ｇ／ｃｍ３以上であるようにすることができる。 The density of the linear polyethylene constituting the heat seal layer is in the range of 0.890 to 0.940 g / cm 3 , and the density of the linear polyethylene constituting the second linear polyethylene resin layer is 0.890 g / cm 2. It can be made to be cm 3 or more.
また、上記線状ポリエチレンフィルムを使用して、２色以上の多色印刷をした印刷フィルムとラミネート又は印刷及び他の素材とラミネートした後のヒートシール面の摩擦係数が、請求項１、２又は３の線状ポリエチレンフィルムを無色印刷フィルムとラミネート後のヒートシール面の摩擦係数に対して２．０倍以下で、且つ最大摩擦係数が０．５５以下であるようにすることができる。 Further, the friction coefficient of the heat seal surface after laminating or printing and laminating with other materials using the linear polyethylene film and multi-color printing of two or more colors is claim 1, 2 or The linear polyethylene film of No. 3 can be made 2.0 times or less the friction coefficient of the heat-seal surface after lamination with the colorless printing film, and the maximum friction coefficient can be 0.55 or less.
本発明は、上記諸課題に対して、滑剤粉末の散布を必要とせず、低温シール性、低密度の線状ポリエチレンフィルムを実現し優れた滑性、アンチブロッキング性、加熱非接着性、優れた巻特性などを解決し、包装分野での優れたヒートシーラントを提供することができるものである。 The present invention does not require spraying of lubricant powder for the above-mentioned problems, and realizes a low-temperature sealing property, a low-density linear polyethylene film, and has excellent lubricity, anti-blocking property, heat non-adhesive property, and excellent It can solve the winding characteristics and provide an excellent heat sealant in the packaging field.
以下、本発明の実施の形態を説明する。 Embodiments of the present invention will be described below.
本発明の線状ポリエチレンフィルムは、少なくとも２層からなる線状ポリエチレンフィルムにおいて、該フィルムのヒートシール面を構成するヒートシール層が、粒子の平均粒径が５〜１５μｍの範囲にある定形有機系粒子Ａと、粒子の平均粒径が３〜２０μｍの範囲にある不定形無機系粒子Ｂと、炭素数が１６以上である成分が６０％以上である脂肪酸アミド系及び／又は脂肪酸エステル系滑剤Ｃとが、ヒートシール層の全量基準で、定形有機系粒子Ａ及び不定形無機系粒子Ｂの合計で３，０００〜７，０００ｐｐｍ、滑剤Ｃが６０〜１，０００ｐｐｍの範囲で混合された線状ポリエチレン樹脂からなり、ヒートシール層のヒートシール面の反対面に、第２の線状ポリエチレン樹脂層を有してなるものである。 The linear polyethylene film of the present invention is a linear polyethylene film comprising at least two layers, wherein the heat seal layer constituting the heat seal surface of the film has a mean organic particle size in the range of 5 to 15 μm Particle A, amorphous inorganic particles B having an average particle diameter of 3 to 20 μm, and fatty acid amide and / or fatty acid ester lubricant C having a component having 16 or more carbon atoms of 60% or more Is a linear shape in which the total amount of the regular organic particles A and the irregular inorganic particles B is 3,000 to 7,000 ppm and the lubricant C is mixed in the range of 60 to 1,000 ppm, based on the total amount of the heat seal layer. It consists of polyethylene resin, and has a 2nd linear polyethylene resin layer in the opposite surface to the heat seal surface of a heat seal layer.
ここで、多色印刷など二次加工の工程が増加する場合は、好ましくはＡ及びＢの合計量は同様でよいが、滑剤Ｃは９０〜７００ｐｐｍの範囲が品質上望まれる。なお、滑剤Ｃを増加することはでき、滑性も向上するが、問題は経時による透明性の悪化、ヒートシール性の低下、特に低温シール性が悪化し高速充填包装シール、又はヒートシール部の熱皺防止の観点から望ましくなく、且つラミネート強度が低下する。 Here, when the number of secondary processing steps such as multi-color printing increases, the total amount of A and B may be the same, but the lubricant C is desired in the range of 90 to 700 ppm in terms of quality. Although the lubricant C can be increased and the lubricity is improved, the problem is that the transparency deteriorates with time, the heat sealability deteriorates, particularly the low temperature sealability deteriorates, and the high-speed filling packaging seal or the heat seal part It is not desirable from the viewpoint of preventing hot-bath and the laminate strength is lowered.
一方、反対面には該面を形成する樹脂層の全量基準で粒子Ａ及び粒子Ｂの合計量が１，５００ｐｐｍ以下であり、滑剤Ｃの混合量が４００ｐｐｍ以下からなる少なくとも２層から構成された線状ポリエチレンフィルムにより各種の課題が解決された。 On the other hand, on the opposite surface, the total amount of particles A and particles B was 1,500 ppm or less based on the total amount of the resin layer forming the surface, and the mixture amount of lubricant C was composed of at least two layers consisting of 400 ppm or less. Various problems have been solved by the linear polyethylene film.
混合する定形有機系粒子Ａは平均粒径が５μｍ未満では多色印刷では十分な滑性、つまり安定した摩擦係数を得ることができない。一方１５μｍを超えるとフィルム表面に大きな粗面形成がなされ、ヒートシール時に合わせたフィルムの接触状態が悪くなり、接触部に微小空気が抱込まれ、シール部の密封性が悪化するだけでなく、ヒートシール強度が発現開始する性質、つまり低温ヒートシール性が悪化する。更に粒子Ａ単独では完全な滑性及びアンチブロッキング性、口開き性、多色印刷易滑性などの実用特性が満足な水準に至らないことがわかった。
本発明で使用する定形有機系粒子Ａは、例えば、図３に示すような球状のほか、棒状、楕円状、四角形状、三角形状、紡錘形状などの一定の形状をした粒子の集合体をいい、球状、楕円状のものが好ましい。
また、定形有機系粒子Ａは、有機重合体からなる架橋粒子、例えばポリメチルメタクリレート及び本成分を主体とした共重合体からなるアクリル系樹脂からなる架橋球状定形架橋粒子、有機重合体の表面に架橋性有機重合体を被覆した粒子及び熱硬化性、加熱反応性を有する材料、無機系粒子の表面を有機合成樹脂で被覆した材料などが挙げられる。勿論上記に挙げた粒子に限定されるものではないが、上記のような形状と３２０℃以下の温度で加熱変形が生じにくく、無機系粒子のような柔軟性にかける材料ではない有機系粒子と該層を形成する熱可塑性樹脂と直接接触状態で混合存在するという基本に基づいた粒子であることが必要である。
有機重合体である意味は軟質熱可塑性樹脂では硬い無機系材料ではフィルムに傷がつきやすく、耐スクラッチ性が悪化し、フィルム間の擦傷や内容物との摺擦による傷の発生により透明性が悪化するからである。
If the average organic particle size A to be mixed is less than 5 μm, sufficient slipperiness, that is, a stable friction coefficient cannot be obtained in multicolor printing. On the other hand, when the thickness exceeds 15 μm, a large rough surface is formed on the film surface, the contact state of the film combined at the time of heat sealing is deteriorated, minute air is entrapped in the contact portion, and the sealing performance of the seal portion is deteriorated, The property that the heat seal strength starts to develop, that is, the low temperature heat seal property is deteriorated. Furthermore, it was found that the practical properties such as perfect slipperiness, antiblocking property, openability, and multicolor printing slipperiness do not reach satisfactory levels with the particles A alone.
The regular organic particles A used in the present invention are, for example, a collection of particles having a certain shape such as a rod shape, an ellipse shape, a square shape, a triangular shape, or a spindle shape in addition to a spherical shape as shown in FIG. Spherical and elliptical ones are preferred.
Further, the regular organic particles A are crosslinked particles composed of an organic polymer, for example, crosslinked spherical regular crosslinked particles composed of an acrylic resin composed of polymethyl methacrylate and a copolymer mainly composed of the present component, on the surface of the organic polymer. Examples thereof include particles coated with a crosslinkable organic polymer, materials having thermosetting properties and heat reactivity, and materials in which the surface of inorganic particles is coated with an organic synthetic resin. Of course, the particles are not limited to the above-mentioned particles, but organic particles that are not easily deformed by heating at a temperature of 320 ° C. or less as described above, and are not a material subject to flexibility such as inorganic particles; The particles need to be based on the principle that they are mixed and present in direct contact with the thermoplastic resin forming the layer.
The meaning of an organic polymer means that a soft thermoplastic resin is hard to scratch with a hard inorganic material, the scratch resistance is deteriorated, and transparency is caused by scratches between the films or scratches with the contents. Because it gets worse.
本発明は更に不定形無機系粒子Ｂとして、粒子の平均粒径が３〜２０μｍの範囲にある不定形無機系粒子Ｂを併用する。
ここで、不定形無機系粒子Ｂの平均粒径とは、レーザー回折・散乱法に基づくマイクロトラック法により測定した累計粒子分布における５０％点の粒径をいう。
不定形無機系粒子Ｂを併用する目的は、印刷インク、ラミネートの接着剤、コーティング剤、離型剤などに含まれる有機溶剤、分散剤、添加剤などが該熱可塑性樹脂の加工面に吸着したり、拡散、移行してヒートシール面や離型面に析出してくることを防止するためである。
不定形無機系粒子Ｂは、例えば、図４に示すような多孔性粒子を含む混合体からなり、全くの不定形材料の集合体、具体的には、不定形の多孔体と棒状体、板状体との集合体であることが重要であり、粒子相互の絡み合いによる膜状分散形態をとるために、定形粒子の効果の発現性を増幅し、優れた滑性、アンチブロッキング性不要な夾雑物の吸着による移行を防ぐ遮断層を形成することが本発明のもう一つの特徴である。
更に加圧状態における耐スクラッチが向上し、最小の定形有機系粒子Ａの添加量で効果が発現するために、透明性も得られる効果が大きい。また高い面間圧力でも滑性が低下することなく、優れた耐スクラッチ性が得られる。これらの特性から滑剤粉末の散布を完全に除外して使用することができる。
不定形無機系粒子Ｂの寸法が３μｍ未満では滑性効果が発現しないだけでなく、印刷インク、ラミネートの接着剤、コーティング剤などに含まれる有機溶剤、分散剤、添加剤などが該熱可塑性樹脂の加工面に吸着し、次いで拡散、移行しヒートシール面に析出してくることを防止できない。
不定形無機系粒子Ｂはその多孔性と粒子相互の絡み合いによる膜状分散形態をとるために、定形粒子の効果の発現性を増幅し、優れた滑性、アンチブロッキング性不要な夾雑物の吸着による移行を防ぐ遮断層を形成することが本発明のもう一つの特徴が効果的に発現できないからである。定形有機系粒子Ａとの併用効果も得られない。平均粒径が２０μｍを超えるとフィルム表面が荒れるために、密封ヒートシール性が得られにくく、前記同様に接着性と離型性、更に耐スクラッチ性などのバランスのよい特性を実現することが困難となる。
なお、不定形無機系粒子Ｂは、累計粒子分布における２０〜６５μｍの粒径を有する成分比率が、不定形無機系粒子Ｂ全量に対して３０容量％以下であり、且つ、６５μｍを超える粒径のものが実質的に含まれないようにする（篩い分け等により、６５μｍを超える粒径のものを除去する。）ことが望ましいが、これは、２０μｍを超える粗大粒子の混在比率が、該不定形無機系粒子Ｂ全量に対して３０容積％を超えると、フィルムの製膜工程においてフィルター詰まりを生じやすく、更にアルミ箔のような変形しやすい材料とラミネートした場合、突起状の外観不良を生じるためであり、該粗大粒子が混在しても支障を生じないためには、混在比率は３０容積％以下、好ましくは２０容積％以下、更に好ましくは１０容積％以下である。
不定形無機系粒子Ｂは、シリカ、アルミナ、炭酸カルシウム、各種クレーなどの無機系不定形粒子とは異なることが重要である。本発明の不定形粒子は円筒系棒状体、平板状多孔質体、多角形体など混在状態である材料であり、例えば棒状体は長さ方向が最大であり、直径方向は極めて細く、長さと直径の比が極めて大きな材料である。従って大きな最大寸法でもフィルム表面は従来の不定形粒子と異なり平滑な表面を形成し、不定形粒子間の絡み効果によるフィルム表面の硬さを向上し、前記定形有機系粒子Ａとの併用効果が極めて大きいことが本発明の大きな特徴であることを見出した。
これらの材料としては、特に限定されるものではないが、珪藻土のほか、クリストバライト、マイカ、ウイスカーなどがあり、好ましい材料としては珪藻土、分級珪藻土、表面有機酸などで処理した珪藻土、表面処理モンモリロナイト、平板状無機系粒子が選ばれる。
不定形無機系粒子Ｂは、印刷、ラミネート加工による接着剤及びその有機溶剤などが熱可塑性樹脂層に生じがちな吸着、拡散によるヒートシール面への移行による夾雑物を遮断する機能を有することにより、接着特性、滑性、理経性等の重要な表面特性が損なわれないようにすることができる。
In the present invention, the amorphous inorganic particles B having an average particle diameter in the range of 3 to 20 μm are also used as the irregular inorganic particles B.
Here, the average particle size of the amorphous inorganic particles B refers to the particle size at the 50% point in the cumulative particle distribution measured by the microtrack method based on the laser diffraction / scattering method.
The purpose of using the amorphous inorganic particles B together is that organic solvents, dispersants, additives, etc. contained in printing inks, laminating adhesives, coating agents, release agents, etc. are adsorbed on the processed surface of the thermoplastic resin. This is to prevent diffusion, migration, and precipitation on the heat seal surface or release surface.
The amorphous inorganic particles B are made of a mixture containing porous particles as shown in FIG. 4, for example, and are an aggregate of a completely amorphous material, specifically, an amorphous porous body and a rod-shaped body, a plate It is important to be an aggregate with the particles, and in order to take a film-like dispersion form due to the entanglement between particles, the manifestation of the effect of the shaped particles is amplified, and excellent slipperiness and anti-blocking properties are unnecessary. It is another feature of the present invention to form a barrier layer that prevents migration due to adsorption of objects.
Furthermore, since the scratch resistance in a pressurized state is improved and the effect is manifested with the minimum amount of the regular organic particles A added, the effect of obtaining transparency is great. In addition, excellent scratch resistance can be obtained without reducing the slipperiness even at high inter-surface pressures. From these characteristics, it is possible to completely exclude the application of lubricant powder.
If the size of the amorphous inorganic particles B is less than 3 μm, not only the lubricity effect does not appear, but also organic solvents, dispersants, additives, etc. contained in printing inks, laminating adhesives, coating agents, etc. It is not possible to prevent it from adsorbing to the processed surface, then diffusing, transferring and precipitating on the heat seal surface.
Amorphous inorganic particles B take a film-like dispersion form due to their porosity and entanglement with each other, thereby amplifying the manifestation of the effect of the shaped particles and adsorbing impurities that do not require excellent lubricity and anti-blocking properties. This is because another feature of the present invention cannot be effectively expressed by forming a blocking layer that prevents migration due to the above. The combined use effect with the regular organic particles A is not obtained. If the average particle size exceeds 20 μm, the film surface will be rough, and it will be difficult to achieve hermetic heat sealability, and it will be difficult to achieve well-balanced properties such as adhesiveness, releasability, and scratch resistance as described above. It becomes.
In addition, the amorphous inorganic particles B have a component ratio having a particle size of 20 to 65 μm in the cumulative particle distribution of 30% by volume or less with respect to the total amount of the amorphous inorganic particles B, and a particle size exceeding 65 μm. However, it is desirable to remove coarse particles having a particle size exceeding 65 μm by sieving or the like. If it exceeds 30% by volume with respect to the total amount of the regular inorganic particles B, filter clogging is likely to occur in the film-forming process, and further, a projection-like appearance defect will occur when laminated with a material that is easily deformed such as aluminum foil. For this reason, the mixture ratio is 30% by volume or less, preferably 20% by volume or less, more preferably 10% by volume or less in order not to cause trouble even if the coarse particles are mixed.
It is important that the amorphous inorganic particles B are different from inorganic amorphous particles such as silica, alumina, calcium carbonate, and various clays. The amorphous particles of the present invention are materials that are in a mixed state such as cylindrical rod-like bodies, flat plate-like porous bodies, and polygonal bodies. For example, the rod-like bodies have the longest length direction, the diameter direction is extremely thin, and the length and diameter. Is a material with an extremely large ratio. Therefore, even with a large maximum dimension, the film surface forms a smooth surface unlike conventional amorphous particles, improves the hardness of the film surface due to the entanglement effect between the irregular particles, and has the combined effect with the regular organic particles A. It has been found that extremely large is a great feature of the present invention.
These materials are not particularly limited, but include diatomaceous earth, cristobalite, mica, whiskers, etc. Preferred materials include diatomaceous earth, classified diatomaceous earth, diatomaceous earth treated with a surface organic acid, surface-treated montmorillonite, Tabular inorganic particles are selected.
Amorphous inorganic particles B have a function of blocking impurities caused by migration to the heat seal surface due to adsorption and diffusion, which is likely to occur in the thermoplastic resin layer, such as adhesives by printing and laminating and organic solvents thereof. It is possible to prevent important surface properties such as adhesive properties, lubricity, and reasonability from being impaired.
更に粒子Ａ及び粒子Ｂの粒径が上記の範囲にあるでは本発明の目的は達成できない。
すなわち、粒子Ａ及び粒子Ｂの混合系の採用により、アンチブロッキング性が確保できても、巻取性、袋の口開き性、印刷、ラミネート性など二次加工性などが著しく改善され実用性が向上する。
そこで、粒子Ａ及び粒子Ｂの合計量が該層を形成する樹脂層の全量基準で３，０００〜７，０００ｐｐｍの範囲にあることが重要である。
３，０００ｐｐｍ未満では本発明の新機能である優れた滑性及びアンチブロッキング性が得られず、更に特徴である高圧下での滑性、アンチブロッキング性更に耐スクラッチ性が得られず、更に多色印刷での易滑性が発現しなくなり本発明の新しい高機能が達成できなくなる。
一方７，０００ｐｐｍを超えると、本発明の目的に限って判断した場合には透明性の低下、ヒートシール時での密封性の低下、長時間充填放置又は流通中における液漏れ、液浸出などが生じる。
Furthermore, the object of the present invention cannot be achieved if the particle diameters of the particles A and B are in the above range.
That is, by adopting a mixed system of particles A and particles B, even if anti-blocking properties can be ensured, secondary workability such as winding properties, bag opening properties, printing, laminating properties, etc. are remarkably improved and practicality is improved. improves.
Therefore, it is important that the total amount of particles A and particles B is in the range of 3,000 to 7,000 ppm based on the total amount of the resin layer forming the layer.
If it is less than 3,000 ppm, excellent slipperiness and antiblocking properties, which are new functions of the present invention, cannot be obtained, and further, characteristics such as slipperiness under high pressure, antiblocking properties, and scratch resistance cannot be obtained. The slipperiness in color printing does not appear and the new high function of the present invention cannot be achieved.
On the other hand, when it exceeds 7,000 ppm, when it is judged only for the purpose of the present invention, there is a decrease in transparency, a decrease in sealing performance at the time of heat sealing, a liquid leakage during standing for a long time or circulation, a liquid leaching, etc. Arise.
更に定形有機系粒子Ａ及び不定形無機系粒子Ｂの混合濃度制限に加えて、炭素数が１６以上の脂肪酸アミド系及び／又は脂肪酸エステル系滑剤Ｃを併用することが重要である。滑剤Ｃの炭素数は、好ましくは炭素数が１８以上である。
代表的な脂肪酸アミドの例としてパルミチン酸アミド、ステアリン酸アミド、エルカ酸アミド、ベへニン酸アミド、ステアリルエルカミド等の脂肪酸アミドやメチレンビスステアリン酸アミド、エチレンビスステアリン酸アミドのアルキレン脂肪酸アミドが挙げられる。
また、代表的な脂肪酸エステルの例としてステアリン酸ブチル、ステアリン酸モノグリセリド、ステアリルステアレート、ソルビタン脂肪酸エステル等が挙げられる。
滑剤Ｃは、６０〜１，０００ｐｐｍの範囲で混合することが重要である。
滑剤Ｃが該層を形成する樹脂層の全量基準で６０ｐｐｍ未満では、滑性が悪く滑剤粉末を散布しなければならず、本発明の目的は達成できない。従って滑剤粉末を散布しなければ袋の口開き性、加圧時の滑り不良、巻取時の皺発生防止などは不可能であり、多色印刷では殆ど滑らなくなる。
好ましくは多色印刷など二次加工度が増える場合はＡ及びＢの合計量は前記と同様でもよいが、Ｃの添加量は９０ｐｐｍ以上が品質的に優れた製品を提供することができる。
一方１，０００ｐｐｍを超えると滑性はよくなるものの、加工工程、在庫、流通経時後にヒートシール性の低下、密封性の低下、透明性の低下などオールシーズンにおける品質の安定性は得られなくなる。
上記のように多色印刷など二次加工度が増加する場合でも７００ｐｐｍ以内でも安定した性能は発現できるために、経時変化による品質変化を最小限度にしたい用途ではこの条件が好ましい。
これにより、線状ポリエチレンフィルムを使用して、２色以上の多色印刷をした印刷フィルムとラミネート又は印刷及び他の素材とラミネートした後のヒートシール面の摩擦係数μａが、線状ポリエチレンフィルムを無色印刷フィルムとラミネート後のヒートシール面の摩擦係数μｂに対して２．０倍以下、好ましくは１．６倍以下で、且つ最大摩擦係数が０．５５以下であるようにすることができる。
また滑剤Ｃの炭素数が１６以上の成分が滑剤の重量基準で６５％以上であることが好ましく、７５％以上であることが更に好ましい。
６５％未満では上記現象が一層激しくなり、安定した品質のフィルムが得にくい場合が認められた。
２層の場合を例に挙げれば、本混合面が袋でいえば内面つまりヒートシール面のアンチブロッキング性は改良されても、滑剤粉末の散布を要し、更に経時によるヒートシール性の低下、ラミネート強度の低下など接着性の悪化など著しく低下するために避けなければならない。
炭素数１６未満の成分は生産直後からの早期の滑性、アンチブロッキング性が発現する利点もあることから、上記のように最大で４０％以下であることが好ましい。
４０％を超えると上記の通り滑性効果、アンチブロッキング効果、季節変動により変動し、品質保証が困難となる場合が認められた。
Furthermore, in addition to limiting the mixing concentration of the regular organic particles A and the irregular inorganic particles B, it is important to use a fatty acid amide-based and / or fatty acid ester-based lubricant C having 16 or more carbon atoms. The carbon number of the lubricant C is preferably 18 or more.
Examples of typical fatty acid amides include fatty acid amides such as palmitic acid amide, stearic acid amide, erucic acid amide, behenic acid amide, stearyl erucamide, methylene bis stearic acid amide, and alkylene fatty acid amides of ethylene bis stearic acid amide. Can be mentioned.
Examples of typical fatty acid esters include butyl stearate, stearic acid monoglyceride, stearyl stearate, sorbitan fatty acid ester and the like.
It is important that the lubricant C is mixed in the range of 60 to 1,000 ppm.
If the lubricant C is less than 60 ppm based on the total amount of the resin layer forming the layer, the lubricant is poor and the lubricant powder must be sprayed, and the object of the present invention cannot be achieved. Accordingly, without spraying the lubricant powder, it is impossible to open the bag, to prevent slippage during pressurization, to prevent wrinkles during winding, and to hardly slip in multicolor printing.
Preferably, when the degree of secondary processing increases, such as multicolor printing, the total amount of A and B may be the same as described above, but the amount of C added is 90 ppm or more, so that a product with excellent quality can be provided.
On the other hand, if it exceeds 1,000 ppm, the lubricity will be improved, but the stability of quality in all seasons will not be obtained, such as deterioration of heat sealability, deterioration of sealability, and transparency after processing, inventory and distribution.
As described above, even when the degree of secondary processing increases, such as multicolor printing, stable performance can be exhibited even within 700 ppm. Therefore, this condition is preferable in applications where it is desired to minimize the quality change due to aging.
Thus, using a linear polyethylene film, the friction coefficient μa of the heat-seal surface after laminating with a printing film laminated with multi-color printing of two or more colors and printing or other materials, the linear polyethylene film The friction coefficient μb between the colorless printing film and the heat-sealed surface after lamination can be 2.0 times or less, preferably 1.6 times or less, and the maximum friction coefficient can be 0.55 or less.
Further, the component having 16 or more carbon atoms in the lubricant C is preferably 65% or more, more preferably 75% or more based on the weight of the lubricant.
If it is less than 65%, the above phenomenon becomes more severe, and it has been recognized that it is difficult to obtain a film having a stable quality.
Taking the case of two layers as an example, if the mixing surface is a bag, the anti-blocking property of the inner surface, that is, the heat seal surface, is improved, but spraying of lubricant powder is required, and further the heat seal property decreases with time, It must be avoided because the adhesive strength deteriorates, such as a decrease in laminate strength.
A component having less than 16 carbon atoms has an advantage that early slipperiness and antiblocking properties appear immediately after production, and therefore, it is preferably 40% or less as described above.
When exceeding 40%, as described above, there were cases in which it was difficult to assure quality because of the slippery effect, anti-blocking effect, and seasonal fluctuation.
本発明のフィルムは、図１〜図２に示すように、少なくとも２層からなりヒートシール層である第１層１は前記の線状ポリエチレン樹脂から構成されたものであり、該第１層１の反対面を構成する第２層２は該第１層の混合成分が限定されることが重要条件である。
第１層に用いる線状ポリエチレンの密度は０．８９０〜０．９５０ｇ／ｃｍ３の範囲で使用されるが、低温ヒートシール性、高速充填包装が望まれる場合には、好ましくは０．８９５〜０．９２５ｇ／ｃｍ３の範囲が実用的には望まれる。特にヒートシール面は低密度が要求されるゆえに前記の課題が生じるわけである。本発明の技術はこれらの課題を解決するものであるから従来技術よりも一層、第１層に低密度線状ポリエチレンが使用することができるものである。
第２層は第１層に使用する線状ポリエチレンと同様に使用できるが、好ましくは第１層よりも高い密度の線状ポリエチレンを使用することが望ましい。
更に好ましい構成フィルムとして、第２層、つまり第１層の反対面表面は、Ａ、Ｂの合計量とＣの混合濃度が第１層の混合濃度に対して５〜３０％からなる第２層を形成し、更に３層を形成する場合は該層がこの基準を満足しなければならない。
以下４層以上も同様の設計基準が求められることはいうまでもない。
勿論上記の２及び３層複合フィルムを例にとれば、後加工で更にラミネートすることも当然行うことができる。ラミネートする基材は限定されるものではないが一般的に使用される材料を例示すれば二軸延伸ポリプロピレン、二軸延伸ポリエステル、二軸延伸ポリアミドフィルムである。かかる基材と共にガスバリア性、光線遮断性、防湿性など内容物保護性を付与するための遮断性フィルム、例えばアルミ箔、金属蒸着、バリアコートフィルムや酸化金属蒸着フィルム、ＭＸＤ−６、ＥＶＯＨ、ＰＶＡフィルムなど公知の材料が合わせてラミネートされて実用化される。このようにラミネートされた後も、第１層は最終的な製品になった場合に表面に出るため該面の優れた滑性、アンチブロッキング性、耐熱性を活かすことができる。
一方第２層又は第３層は優れた接着性を示し、経時変化がなく、長期接着安定性を提供できる。
特に本発明におけるＡ、Ｂ及びＣの混合率或いは混合量の範囲外では要求される接着力が余りにも低下するために好ましくない。
As shown in FIGS. 1 to 2, the film of the present invention comprises at least two layers and the first layer 1 which is a heat seal layer is composed of the linear polyethylene resin, and the first layer 1 It is an important condition that the mixed component of the first layer is limited for the second layer 2 constituting the opposite surface.
The density of the linear polyethylene used for the first layer is in the range of 0.890 to 0.950 g / cm 3 , but when low temperature heat sealability and high speed filling packaging are desired, preferably 0.895 to 0.995 A range of 0.925 g / cm 3 is practically desired. In particular, the above-mentioned problem arises because the heat seal surface is required to have a low density. Since the technique of the present invention solves these problems, a low-density linear polyethylene can be used in the first layer more than the conventional technique.
The second layer can be used in the same manner as the linear polyethylene used for the first layer, but it is preferable to use linear polyethylene having a higher density than that of the first layer.
As a more preferable constituent film, the second layer, that is, the opposite surface of the first layer is a second layer in which the total amount of A and B and the mixed concentration of C are 5 to 30% of the mixed concentration of the first layer. When forming three layers, the layer must satisfy this criterion.
Needless to say, the same design criteria are required for four or more layers.
Of course, if the above-mentioned two- and three-layer composite film is taken as an example, it is naturally possible to further laminate by post-processing. The substrate to be laminated is not limited, but examples of commonly used materials include biaxially stretched polypropylene, biaxially stretched polyester, and biaxially stretched polyamide film. A barrier film for imparting content protection properties such as gas barrier property, light blocking property, moisture proofing together with such a substrate, such as aluminum foil, metal deposition, barrier coat film, metal oxide deposition film, MXD-6, EVOH, PVA A known material such as a film is laminated and put into practical use. Even after being laminated in this manner, the first layer appears on the surface when it becomes a final product, and therefore the excellent slipperiness, antiblocking property, and heat resistance of the surface can be utilized.
On the other hand, the second layer or the third layer exhibits excellent adhesion, does not change with time, and can provide long-term adhesion stability.
In particular, if the mixing ratio or mixing amount of A, B and C in the present invention is not within the range, the required adhesive strength is undesirably lowered.
更に第２層又は第３層はＡ、Ｂ及びＣの添加量が第１層に比べて減少するので、第２層又は第３層のみからなるフィルムでは滑性が悪くなるために巻取時における空気含有量が少なくなり巻皺、又は巻内層と巻外層における空気含有量が揃わず均一な巻取ロールの提供が不可能になり、且つ高温状態でフィルムはブロッキングするために実用化が不可能である。
しかし本発明では第１層が使用時表面に出ること及び巻取時は第１層と第２層又は第１層と第３層が接触するために極めて容易に巻取が可能であり、フィルム面間の空気含有量も制御しうることがわかった。
Furthermore, since the amount of addition of A, B, and C in the second layer or the third layer is reduced as compared with the first layer, the film consisting only of the second layer or the third layer has poor lubricity, so that it is not suitable for winding. The air content in the sheet is reduced, the air content in the winding layer or the inner layer and the outer layer is not uniform, and it becomes impossible to provide a uniform take-up roll, and the film is blocked at high temperature, so that the practical use is not possible. Is possible.
However, in the present invention, the first layer comes out on the surface during use and the first layer and the second layer or the first layer and the third layer come into contact with each other at the time of winding. It was found that the air content between the faces could also be controlled.
少なくとも２層からなる複合フィルムの厚み構成は第１層と第２層との使用厚みは限定されるものではないが、一般的には全層合計厚みは２５〜２００μｍである。第１層以外の層との厚み構成は第１層が重要であり１５〜７０μｍが望ましい。７０μｍを超えると本発明品の特性が失われるものではないが、本発明の特性を実現しつつも、更に透明性を求める用途では好ましくは１５〜５０μｍが好ましい理由であり、更に好ましくは２０〜５０μｍである。第１層が１５μｍ未満では前記課題を解決する本発明の性能は得られない。第１層が７０μｍを超えると臨界的に透明性が悪化するものではないが、過剰に厚くする意味はないからである。
従って第１層を除く他の層の合計厚みは１０〜１８５μｍの範囲において実用化される場合が多い。
この理由は前記の通り本発明の目的、構成要件からみれば第１層の厚みは１５μｍ以上が必要であり、本発明の目的は達成できないからである。第２層はラミネート面であるので特に限定されるものではないが上記の通り実用化される第１層厚みと全体厚みで決定される。
Although the use thickness of the first layer and the second layer is not limited in the thickness configuration of the composite film composed of at least two layers, the total thickness of all layers is generally 25 to 200 μm. The first layer is important for the thickness configuration with the layers other than the first layer, and is preferably 15 to 70 μm. When the thickness exceeds 70 μm, the properties of the product of the present invention are not lost, but it is the reason why 15 to 50 μm is preferable in applications that further require transparency while realizing the properties of the present invention, and more preferably 20 to 20 μm. 50 μm. If the first layer is less than 15 μm, the performance of the present invention that solves the above problems cannot be obtained. If the first layer exceeds 70 μm, the transparency is not critically deteriorated, but it is meaningless to make it excessively thick.
Therefore, the total thickness of the other layers excluding the first layer is often put into practical use in the range of 10 to 185 μm.
This is because the thickness of the first layer is required to be 15 μm or more in view of the object and the structural requirements of the present invention as described above, and the object of the present invention cannot be achieved. Since the second layer is a laminate surface, it is not particularly limited, but is determined by the first layer thickness and the overall thickness that are put into practical use as described above.
以下、本発明で特性を表すための評価方法の概要を説明する。 Hereinafter, an outline of an evaluation method for expressing characteristics in the present invention will be described.
［滑性］
ＪＩＳ Ｋ７１２５に準拠して摩擦係数を測定した。
[Lubricity]
The friction coefficient was measured according to JIS K7125.
［ブロッキング性］
１０ｃｍ角のフィルムを５枚重ね、下部の支持台と上部のアルミニウム板の間に挿入し、アルミニウム板の上に重さ１ｋｇの重りを乗せて温度６０℃の環境内に３日間放置した後に取り出し、重ねたフィルムの剥離力を測定した。フィルムの剥離角度は１８０度とし、剥離速度は２００ｍｍ／分の下で測定した。また特別に荷重依存性などを調べる場合は上記標準条件と異なり、重りの重量のみを変更して同様に測定した。勿論第１層と第２層又は第３層との接触状態と第１層同士及び第２層又は第３層同士の面を合わせて、該合わせ面を測定評価した。
[Blocking properties]
5 sheets of 10 cm square film are stacked, inserted between the lower support base and the upper aluminum plate, a 1 kg weight is placed on the aluminum plate, left in an environment at a temperature of 60 ° C. for 3 days, then taken out and stacked. The peel strength of the film was measured. The peel angle of the film was 180 degrees, and the peel rate was measured at 200 mm / min. In addition, when specially examining the load dependency or the like, unlike the standard conditions described above, only the weight weight was changed and the measurement was performed in the same manner. Of course, the contact state between the first layer and the second layer or the third layer was combined with the surfaces of the first layer and the second layer or the third layer, and the mating surface was measured and evaluated.
［ヘイズ］
ＪＩＳ Ｋ６７１４に基づき評価した。
[Haze]
Evaluation was made based on JIS K6714.
［高温融着性］
縦横７ｃｍのフィルムを第１層同士を合わせて５ｃｍ三方を完全密封ヒートシールし、次いで水２ｇを軽量充填した後に、開放部をヒートシールして、シール内寸法が５ｃｍ角になるようにして、クリップ止めした。該水充填袋を９０℃の熱湯に３０分間浸漬した後に取り出し、クリップ止めした箇所の袋フィルム内面が融着していないかを確認した。
[High temperature fusibility]
7cm length and breadth film together with the first layer, 5cm three sides are completely sealed and heat sealed, then 2g of water is lightly filled, then the open part is heat sealed so that the inside dimension of the seal is 5cm square, Clipped. The water-filled bag was immersed in hot water at 90 ° C. for 30 minutes and then taken out, and it was confirmed whether the inner surface of the bag film where the clip was fastened was not fused.
［ラミネート強度］
本発明フィルムとポリエステルフィルムとをポリエステルポリウレタン樹脂を用いて接着し、４５℃で４８時間エージングした。両面間の接着威力を測定した。
その後フィルムのラミネート面に有機溶剤を適量付着させ面間を部分的に剥離し、次いでこのきっかけ部分からフィルムを剥離して剥用強度を測定した。
[Lamination strength]
The film of the present invention and the polyester film were bonded using a polyester polyurethane resin and aged at 45 ° C. for 48 hours. The adhesive power between both sides was measured.
Thereafter, an appropriate amount of an organic solvent was attached to the laminate surface of the film to partially peel the surface, and then the film was peeled from this trigger portion and the peel strength was measured.
［口開き性］
１０ｃｍ角のフィルムを第１層同士合わせて２セット重ね、下部の支持台と上部のアルミニウム板の間に挿入し、アルミニウム板の上に重さ１ｋｇの重りを乗せて温度４０℃の環境内に３日間放置した後に取り出し、重ねたフィルムのスライド方向の面間剥離力を測定した。特別に荷重依存性などを調べる場合は上記標準条件とは重りの重量のみを変更して同様に測定した。
[Openness]
Two sets of 10 cm square films are stacked on top of each other, inserted between the lower support and the upper aluminum plate, and a 1 kg weight is placed on the aluminum plate for 3 days in an environment of 40 ° C. The film was taken out after being allowed to stand, and the peel force between the surfaces of the stacked films in the sliding direction was measured. In particular, when examining the load dependence and the like, the measurement was performed in the same manner except that only the weight of the weight was changed from the standard condition.
［耐スクラッチ性］
第１層を金属台の上に固定し、上部には摺動子にゴム板を装着して、荷重５００ｇをかけて５往復摺動し、フィルムのヘイズ変化を測定した。
[Scratch resistance]
The first layer was fixed on a metal table, a rubber plate was attached to the upper part, and the film was slid 5 times with a load of 500 g, and the change in haze of the film was measured.
［ヒートシール強度］
ＪＩＳ Ｋ６７２３に準拠して、測定フィルム巾は１５ｍｍに切断し、シール圧力を１ＭＰａ、シール時間を１秒間とし、剥離角度を９０度に保ち、剥離速度を２００ｍｍ／分に設定して測定した。
[Heat seal strength]
In accordance with JIS K6723, the measurement film width was cut to 15 mm, the sealing pressure was 1 MPa, the sealing time was 1 second, the peeling angle was kept at 90 degrees, and the peeling speed was set to 200 mm / min.
以下、本発明のフィルムに関して実施例を用いて説明する。 Hereinafter, the film of the present invention will be described using examples.
メルトインデックス７．０、密度０．９１０ｇ／ｃｍ３の線状ポリエチレンを第１層及び第２層に使用し、３色印刷したナイロン６フィルムの印刷面に先ず第２層を溶融押出ラミネートし、次いで第２層面に引き続いて第１層を溶融押出するタンデム方式でラミネートした。第２層にはＡ、Ｂ及びＣをそれぞれ０ｐｐｍとして、厚みを２０μｍとした。
ここで、定形有機系粒子Ａには、ポリメチルメタクリレート球状粒子（日本触媒社製、ポリメタクリル酸メチル系架橋物、ポリスターＭＡ１０１０）を用いるようにしている。
また、不定形無機系粒子Ｂには、珪藻土（白石カルシウム社製、ＳＴ−Ｃ４９９）を用いるようにしている。
Ａ、Ｂの粒子の平均粒径は、それぞれ、１０．０μｍ、９．８μｍである。
また、Ｂの２０μｍを超える粗大粒子の混在比率は、該不定形粒子の全量に対して１５容積％であり、且つ、６５μｍを超える粒径のものが実質的に含まれないものであった。
そして、Ａ、Ｂの粒子には、以下の実施例及び参考例を含めて、特記する場合を除き、同じものを用いるようにしている。
また、Ｃには、以下の実施例及び参考例を含めて、特記する場合を除き、エルカ酸アミドを用いるようにしている。
第１層はＡ、Ｂ及びＣを表１のように変更し、該混合樹脂を厚みが３０μｍに調節した。
一方比較例１は実施例１と同様の線状ポリエチレンを使用して、第１層及び第２層に粒径５μｍの不定形シリカを５，０００ｐｐｍ混合し、更にステアリン酸アミドを５００ｐｐｍ混合した。
第１層及び第２層は本実施例と同様の順序で３色印刷したナイロン６フィルムの印刷面にタンデム溶融押出ラミネートした。第１層及び第２層の厚み構成は本実施例と同様とした。
比較例２は比較例１の第１層面に澱粉の表面にシリコンを付着させた粉末を散布した。
本実施例及び比較例共にラミネート後引き続いて４０℃で４８時間エージングした後、第１層面の該線状ポリエチレン面の特性を表１に示す。
A linear polyethylene having a melt index of 7.0 and a density of 0.910 g / cm 3 is used for the first layer and the second layer. Subsequently, it laminated by the tandem system which melt-extrudes the 1st layer following the 2nd layer surface. In the second layer, A, B, and C were each 0 ppm, and the thickness was 20 μm.
Here, as the regular organic particles A, polymethyl methacrylate spherical particles (manufactured by Nippon Shokubai Co., Ltd., polymethyl methacrylate cross-linked product, Polystar MA1010) are used.
Further, diatomaceous earth (manufactured by Shiraishi Calcium Co., ST-C499) is used for the amorphous inorganic particles B.
The average particle diameters of the A and B particles are 10.0 μm and 9.8 μm, respectively.
Further, the mixing ratio of coarse particles exceeding 20 μm of B was 15% by volume with respect to the total amount of the irregular shaped particles, and particles having a particle diameter exceeding 65 μm were not substantially contained.
The same particles are used as A and B particles, except for the following examples and reference examples, unless otherwise specified.
In addition, erucic acid amide is used for C unless otherwise specified, including the following Examples and Reference Examples.
In the first layer, A, B and C were changed as shown in Table 1, and the thickness of the mixed resin was adjusted to 30 μm.
On the other hand, in Comparative Example 1, the same linear polyethylene as in Example 1 was used, and 5,000 ppm of amorphous silica having a particle size of 5 μm was mixed in the first layer and the second layer, and further 500 ppm of stearamide was mixed.
The first layer and the second layer were tandem melt-extruded laminated on the printing surface of a nylon 6 film printed in three colors in the same order as in this example. The thickness configuration of the first layer and the second layer was the same as in this example.
In Comparative Example 2, powder having silicon adhered to the surface of starch was sprayed on the first layer surface of Comparative Example 1.
Table 1 shows the characteristics of the linear polyethylene surface of the first layer surface after laminating and subsequently aging at 40 ° C. for 48 hours in both the examples and comparative examples.
本発明フィルムは比較例１と比較して、明らかに優れた滑性、アンチブロッキング性並びに９０℃、３０分加熱水中で殺菌処理した後の第１層面の耐熱融着特性を示すと共に、口開き性も良好で、１ｋｇ加重下で１ヶ月間の加圧保管後も簡単に口開きができた。
更にこのような易滑性、アンチブロッキング性を示した上で、本来問題となるラミネート強度、ヒートシール強度も全く経時変化もなく安定した長期品質保証性を示した。
比較例１は滑性、アンチブロッキング性が悪く、比較例２のように滑剤散布が必要であることが認められる。しかも、印刷後の摩擦係数の変化を示す表６（以下の実施例及び参考例を含む。）に示すように、３色印刷後に著しい摩擦係数の増加がみられた。印刷を実施しなかったラミネートフィルムの摩擦係数は前者が０．２３、後者が０．２１であり、無色ラミネート品と３色印刷ラミネート品の摩擦係数上昇比はそれぞれ１．０４及び１．２４であった。比較例１は無色ラミネート品の摩擦係数が０．７５であり、摩擦係数上昇比は２．０８であった。比較例２は粉末散布で滑性は改良できたものの、耐スクラッチ性が悪く、また９０℃における加熱殺菌処理においては、部分的に熱融着が認められ、散布した滑剤粒子が全くまんべんなく散布付着ができないことによるものと考えられる。またヒートシール性はいくらか悪くなり、且つ密封性は内容物の２週間後における加圧浸み出しテストから明らかに悪化していることが認められた。また製膜時の巻取性は明らかに比較例では滑り不良と空気の流通性が悪いために、巻取時の随伴流空気の巻込みによる小窪状の凹凸の発生、巻皺の発生が認められ、フィルム厚み斑が少しでも悪い場合は斜め皺が生じた。また再度次の加工工程で巻戻する場合に、フィルムロールが軽いブロッキング状態になり、剥離強度が高く、剥離音と共に剥離強度のバラツキで巻戻しテンション変動を誘発し、また剥離強度が本発明フィルムより明らかに高いために剥離帯電し、加工時の静電気トラブルの原因ともなることが認められた。
滑剤粉末を散布した比較例２ではこの種の問題はなかったが、上記の問題点と共に加工機でのガイド板など機械設備の汚染を避けることはできなかった。
Compared with Comparative Example 1, the film of the present invention clearly exhibits superior lubricity, anti-blocking properties, and heat-resistant fusing characteristics of the first layer surface after sterilization treatment in heated water at 90 ° C. for 30 minutes, and has a mouth opening. It was easy to open even after 1 month of pressure storage under 1 kg load.
Furthermore, in addition to showing such slipperiness and anti-blocking properties, the laminate strength and heat seal strength, which are inherently problematic, also showed stable long-term quality assurance with no change over time.
It is recognized that Comparative Example 1 has poor lubricity and anti-blocking properties and that spraying of lubricant is necessary as in Comparative Example 2. Moreover, as shown in Table 6 (including the following examples and reference examples) showing changes in the friction coefficient after printing, a significant increase in the friction coefficient was observed after three-color printing. The coefficient of friction of the laminate film that was not printed was 0.23 for the former and 0.21 for the latter, and the coefficient of increase in the coefficient of friction between the colorless laminate and the three-color printed laminate was 1.04 and 1.24, respectively. there were. In Comparative Example 1, the colorless laminate had a friction coefficient of 0.75, and the friction coefficient increase ratio was 2.08. Although Comparative Example 2 improved the lubricity by spraying powder, the scratch resistance was poor, and in heat sterilization at 90 ° C., heat fusion was partially observed, and the sprayed lubricant particles were completely sprayed and adhered. This is thought to be due to the inability to do. It was also found that the heat sealability was somewhat worse and the sealability was clearly deteriorated from the pressure leaching test after 2 weeks of the contents. In addition, the winding property during film formation is clearly inferior in slipping and poor air circulation in the comparative example. When the film thickness unevenness was as bad as possible, oblique wrinkles occurred. When rewinding in the next processing step again, the film roll is in a light blocking state, has high peel strength, induces rewind tension fluctuation due to variation in peel strength along with peel sound, and peel strength is the film of the present invention. It was found that the film was peeled and charged due to the apparently high level, which could cause static trouble during processing.
In Comparative Example 2 in which the lubricant powder was sprayed, this type of problem did not occur. However, along with the above problems, contamination of machine equipment such as a guide plate in the processing machine could not be avoided.
メルトインデックス１０．０ｇ／１０分、密度０．９０８０ｇ／ｃｍ３の線状ポリエチレンを第１層に使用し、Ａが２，５００ｐｐｍ、Ｂが１，０００ｐｐｍ及びＣが１，３００ｐｐｍとした。
Ａ、Ｂの粒子の平均粒径は、それぞれ１０．０μｍである（以下の実施例及び比較例も同様。）。
第２層はメルトインデックス７．０ｇ／１０分、密度０．９１８ｇ／ｃｍ３の線状ポリエチレンを使用し、Ａ、Ｂ及びＣはそれぞれ０ｐｐｍとした。
先ず第２層を３色印刷したナイロン６フィルムの印刷面に２０μｍの厚みに調節して溶融押出ラミネートした。引き続いて第１層を該第２面上に３０μｍの厚みに調整してタンデム方式で溶融押出ラミネートした。
比較例３は実施例２と同様の線状ポリエチレン樹脂を使用し、実施例２と同様に３色印刷したナイロン６フィルムの印刷面に溶融押出ラミネートを施した。第１層には不定形シリカ５μｍを５，０００ｐｐｍ混合し、更にオレイン酸アミドを１，０００ｐｐｍ混合した。第２層は第１層と同様の処方とした。比較例４は比較例３の第１層面に澱粉の表面のシリコンを付着させた滑剤粉末を散布した。
ラミネート後、４０℃で４８時間エージングした後の該複合線状ポリエチレン面の特性を表２に示す。本実施例及び比較例３において無色ラミネート品の摩擦係数はそれぞれ０．２８及び０．６５であり、摩擦係数上昇比は前者が１．１１、後者は１．８１であった。
A linear polyethylene having a melt index of 10.0 g / 10 min and a density of 0.9080 g / cm 3 was used for the first layer, and A was 2,500 ppm, B was 1,000 ppm, and C was 1,300 ppm.
The average particle diameter of the A and B particles is 10.0 μm (the same applies to the following examples and comparative examples).
For the second layer, linear polyethylene having a melt index of 7.0 g / 10 min and a density of 0.918 g / cm 3 was used, and A, B, and C were each 0 ppm.
First, melt extrusion lamination was performed by adjusting the thickness of the second layer to a thickness of 20 μm on the printing surface of a nylon 6 film on which three colors were printed. Subsequently, the first layer was adjusted to a thickness of 30 μm on the second surface and melt extrusion laminated by a tandem method.
In Comparative Example 3, the same linear polyethylene resin as in Example 2 was used, and a melt-extruded laminate was applied to the printing surface of a nylon 6 film printed in three colors as in Example 2. In the first layer, 5,000 ppm of amorphous silica 5 μm was mixed, and 1,000 ppm of oleic acid amide was further mixed. The second layer had the same formulation as the first layer. In Comparative Example 4, a lubricant powder in which silicon on the surface of starch was adhered to the first layer surface of Comparative Example 3 was sprayed.
Table 2 shows the characteristics of the composite linear polyethylene surface after aging at 40 ° C. for 48 hours after lamination. In this example and Comparative Example 3, the friction coefficient of the colorless laminate was 0.28 and 0.65, respectively, and the increase ratio of the friction coefficient was 1.11 for the former and 1.81 for the latter.
本発明フィルムは比較例３と比較して、明らかに優れた滑性、アンチブロッキング性並びに９０℃で３０分加熱水中で殺菌処理した後の第１層面の耐熱融着特性を示すと共に、口開き性も良好で、９５℃、３０分加熱水中での耐熱融着性はなく良好であった。また１ｋｇ加重で１ヶ月間の加圧保管後も簡単に口開きができた。
第１層面は滑剤粉末を散布しなくても本発明の主要目的は勿論、巻取性、製袋性も良好であった。
更にこのような易滑性、アンチブロッキング性を示した上で、本来問題となるラミネート強度、ヒートシール強度も全く経時変化もなく安定した長期品質保証性を示した。
比較例３は滑性、アンチブロッキング性が悪く、特に３色印刷後に著しい摩擦係数の増加がみられた。このため、滑性を改良するために比較例４のように滑剤散布が必要であることが認められる。しかしながら９０℃における加熱殺菌処理においては、実施例１で使用した線状ポリエチレンよりも一層低融点であるだけに部分的に熱融着が認められ、散布した滑剤粒子だけでは完全な加熱融着ブロッキングを防止することは困難であることが理解できた。またヒートシール性はいくらか悪くなり、且つ密封性は内容物の２週間後における加圧浸み出しテストから明らかに悪化していることが認められた。また製膜時の巻取性は明らかに比較例３では滑り不良と空気の流通性が悪いために、巻取時の随伴流空気の巻込みによる小窪状の凹凸が発生、巻皺の発生が認められ、フィルム厚み斑が少しでも悪い場合は斜め皺が生じた。また再度次の加工工程で巻戻する場合に、フィルムロールが軽いブロッキング状態になり、剥離強度が高く、剥離音と共に剥離強度のバラツキで巻戻しテンション変動を誘発する現象がみられた。また剥離強度が本発明フィルムより明らかに高いために剥離帯電し、加工時の静電気トラブルの原因ともなることが認められた。
滑剤粉末を散布した比較例４ではこの種の問題はなかったが、加工機でのガイド板など機械設備の汚染を避けることはできなかったことと上記の欠点が認められた。
Compared with Comparative Example 3, the film of the present invention exhibits clearly superior slipperiness, anti-blocking property, and heat-sealing characteristics of the first layer surface after sterilization in heated water at 90 ° C. for 30 minutes, and has a mouth opening. The heat resistance was also good, and there was no heat-resistant fusing property in heated water at 95 ° C. for 30 minutes. In addition, the mouth could be opened easily even after 1 month pressure storage with 1 kg load.
Even if the lubricant powder was not sprayed on the first layer surface, the main object of the present invention, as well as winding and bag-making properties were good.
Furthermore, in addition to showing such slipperiness and anti-blocking properties, the laminate strength and heat seal strength, which are inherently problematic, also showed stable long-term quality assurance with no change over time.
Comparative Example 3 had poor lubricity and anti-blocking properties, and particularly a significant increase in the coefficient of friction was observed after three-color printing. For this reason, in order to improve lubricity, it is recognized that the lubricant spraying is required as in Comparative Example 4. However, in the heat sterilization treatment at 90 ° C., heat fusion is partially observed because the melting point is lower than that of the linear polyethylene used in Example 1, and complete heat fusion blocking is achieved only with the dispersed lubricant particles. It was understood that it was difficult to prevent. It was also found that the heat sealability was somewhat worse and the sealability was clearly deteriorated from the pressure leaching test after 2 weeks of the contents. Further, the winding property at the time of film formation is clearly poor in slipping and poor air circulation in Comparative Example 3, so that small depressions and protrusions are generated due to the entrainment of the accompanying air at the time of winding. Oblique wrinkles occurred when the film thickness unevenness was a little bad. Further, when the film was rewound again in the next processing step, the film roll was in a light blocking state, the peel strength was high, and the phenomenon of inducing rewind tension variation due to the variation in peel strength along with the peel noise was observed. Moreover, since the peel strength was clearly higher than that of the film of the present invention, it was recognized that the film was peeled and charged, causing static electricity trouble during processing.
In Comparative Example 4 in which the lubricant powder was sprayed, this type of problem was not present, but the above-mentioned drawbacks were observed because it was not possible to avoid contamination of machine equipment such as a guide plate in a processing machine.
メルトインデックス１０．０ｇ／１０分、密度０．９０８０ｇ／ｃｍ３の線状ポリエチレンを第１層に使用し、Ａ、Ｂ及びＣを表３に記載の通り変更した。
一方第２層は密度が０．９２０ｇ／ｃｍ３の線状ポリエチレン樹脂を使用し、該層にはＡを２００ｐｐｍ、Ｂを４００ｐｐｍ、Ｃを４００ｐｐｍに混合した。該第１層及び第２層は厚みが前者が３０μｍ、後者も３０μｍになるように調節して３色及び５色印刷したナイロン６フィルムに溶融共押出ラミネートした。
比較例５は本実施例と同様の線状ポリエチレン樹脂構成とし、第１層には不定形シリカ５μｍを１，０００ｐｐｍ混合し、更にエルカ酸アミドを１，０００ｐｐｍ混合した。第２層は不定形シリカを５００ｐｐｍ、エルカ酸アミドを５００ｐｐｍ混合した以外は実施例３と同様に３色印刷したナイロン６フィルムの印刷面とラミネートした。
比較例６は比較例５のフィルムに更に澱粉の表面のシリコンを付着させた滑剤粉末を散布した。
ラミネート後引き続いて４０℃で４８時間エージングした後の該線状ポリエチレンの第１層面の特性を表３に示す。本実施例及び比較例５において無色ラミネート品の摩擦係数はそれぞれ０．２７及び０．６９であり、摩擦係数上昇比は前者の３色印刷品が１．００、５色印刷品が１．５６であり、後者の３色印刷品が１．７５、５色印刷品が２．２８であった。
Linear polyethylene having a melt index of 10.0 g / 10 min and a density of 0.9080 g / cm 3 was used for the first layer, and A, B, and C were changed as shown in Table 3.
On the other hand, a linear polyethylene resin having a density of 0.920 g / cm 3 was used for the second layer, and A was mixed at 200 ppm, B at 400 ppm, and C at 400 ppm. The first layer and the second layer were melt-coextruded laminated on nylon 6 film printed in three colors and five colors by adjusting the thickness to be 30 μm for the former and 30 μm for the latter.
Comparative Example 5 had the same linear polyethylene resin configuration as in this example, and the first layer was mixed with 1,000 ppm of amorphous silica 5 μm and further mixed with 1,000 ppm of erucic acid amide. The second layer was laminated with a printing surface of a nylon 6 film printed in three colors in the same manner as in Example 3 except that 500 ppm of amorphous silica and 500 ppm of erucamide were mixed.
In Comparative Example 6, a lubricant powder in which silicon on the surface of starch was further adhered to the film of Comparative Example 5 was sprayed.
Table 3 shows the characteristics of the first layer surface of the linear polyethylene after lamination and subsequent aging at 40 ° C. for 48 hours. In this example and comparative example 5, the friction coefficient of the colorless laminate product is 0.27 and 0.69, respectively, and the increase ratio of the friction coefficient is 1.00 for the former three-color print product and 1.56 for the five-color print product. The latter three-color print product was 1.75 and the five-color print product was 2.28.
表３から明らかなように、摩擦係数、ブロッキング挙動が変化することが理解できる。
本発明品は極めて安定した摩擦特性、アンチブロッキング性を実現し、昨今の多色印刷要求にも安定した品質の線状ポリエチレンフィルム及びそのラミネート物を提供できることが実証された。
本実施例は滑剤粉末を散布しなくても主目的の特性は勿論のこと、巻取性、製袋性も良好であった。
ブロッキング性も著しく改良されるため袋の口開き性も良好で消費者が開封しやすく、また難滑性によるフィルム面間のスクラッチ傷による透明性悪化も防止できた。
加熱ボイル適性も優れ、滑剤粉末を完全に使用しなくても実用化できる技術が完成した。
As is apparent from Table 3, it can be understood that the friction coefficient and the blocking behavior change.
The product of the present invention has demonstrated extremely stable friction characteristics and anti-blocking properties, and can provide a linear polyethylene film and a laminate thereof having a stable quality even in recent multicolor printing requirements.
In this example, not only the lubricant powder was not sprayed, but also the main objective properties as well as the winding property and bag-making property were good.
Since the blocking property is remarkably improved, the opening property of the bag is good, and it is easy for the consumer to open, and the deterioration of transparency due to scratch scratches between the film surfaces due to the non-slip property can be prevented.
The technology that can be put into practical use without having to use lubricant powder completely has been completed.
メルトインデックス７．０、密度０．９１８ｇ／ｃｍ３の線状ポリエチレンを第１層に使用し、Ａ、Ｂ及びＣを表４のように変更した。Ｃとしてはエルカ酸アミドを用いた。
一方第２層はＡが０ｐｐｍ、Ｂが０ｐｐｍの濃度とし、Ｃが０ｐｐｍとした。
本フィルムは第１層が３０μｍであり、第２層は２０μｍの構成にした。第２層面のみにコロナ放電処理をして、表面張力を４０ｍＮ／ｍに調節して、３色印刷したナイロン６フィルムの印刷面と第２層面とをドライラミネートした。
比較例７及び８は本実施例においてＡ及びＢの添加量が本発明の範囲外の濃度にした場合の例を示す。
該フィルムとラミネート後引き続いて４０℃で４８時間エージングした後の該線状ポリエチレンの第１層面の特性を表４に示す。本実施例の（１）及び（２）の無色ラミネート品の摩擦係数はそれぞれ０．２８及び０．２４であり、摩擦係数上昇比はそれぞれ１．０４及び１．０８であった。比較例７及び８において無色ラミネート品の摩擦係数はそれぞれ０．９２及び０．１０であり、摩擦係数上昇比は前者が１．２０及び２．２０であった。
A linear polyethylene having a melt index of 7.0 and a density of 0.918 g / cm 3 was used for the first layer, and A, B, and C were changed as shown in Table 4. As C, erucic acid amide was used.
On the other hand, the second layer had a concentration of 0 ppm for A, 0 ppm for B, and 0 ppm for C.
This film had a first layer of 30 μm and a second layer of 20 μm. Only the second layer surface was subjected to corona discharge treatment, the surface tension was adjusted to 40 mN / m, and the printing surface of the nylon 6 film printed in three colors and the second layer surface were dry laminated.
Comparative Examples 7 and 8 show examples in which the amounts of A and B added in this example are outside the range of the present invention.
Table 4 shows the characteristics of the first layer surface of the linear polyethylene after being laminated with the film and subsequently aged at 40 ° C. for 48 hours. The friction coefficients of the colorless laminates (1) and (2) of this example were 0.28 and 0.24, respectively, and the coefficient of friction increase ratio was 1.04 and 1.08, respectively. In Comparative Examples 7 and 8, the coefficient of friction of the colorless laminate was 0.92 and 0.10, respectively, and the ratio of increase in the coefficient of friction was 1.20 and 2.20 for the former.
表４に示すように比較例７及び８に比較して良好な特性を示すが、Ａ及びＢの合計添加量が３，０００ｐｐｍ未満では、特に本実施例のように多色印刷においてアンチブロッキング性、滑性及び耐高温融着性に不安を残すなど特異的な欠陥が顕在化することがわかった。
またＡ及びＢの合計添加量が７，０００ｐｐｍを越えると比較例８に示すように滑性、アンチブロッキング性、耐高温融着性が優れるものの、耐スクラッチ性、内容物浸出がみられるようにヒートシール部の密着性が悪化する傾向がみられる。またフィルム表面の粗度が大きくなるために低温度でのヒートシール性が悪化する。
As shown in Table 4, excellent properties are shown as compared with Comparative Examples 7 and 8. However, when the total addition amount of A and B is less than 3,000 ppm, the antiblocking property is particularly obtained in multicolor printing as in this example. It was found that specific defects such as leaving anxiety about lubricity and high-temperature fusing resistance become apparent.
Further, when the total addition amount of A and B exceeds 7,000 ppm, as shown in Comparative Example 8, although slipping property, anti-blocking property, and high-temperature fusion resistance are excellent, scratch resistance and content leaching are observed. There is a tendency for the adhesiveness of the heat seal part to deteriorate. Moreover, since the roughness of the film surface is increased, the heat sealability at low temperatures is deteriorated.
メルトインデックス１０．０ｇ／１０分、密度０．９１０ｇ／ｃｍ３の線状ポリエチレンを第１層に使用し、Ａが３，０００ｐｐｍ、Ｂが１，２００ｐｐｍの濃度とＣは８５０ｐｐｍの濃度に調合した。
一方第２層はＡが０ｐｐｍ、Ｂが５００ｐｐｍの濃度とし、Ｃを５０ｐｐｍの濃度にした。
本フィルムは第１層及び第２層共に３０μｍの構成にした。
そして、図２に示すように、第２層２を、第３層３となる３色印刷したナイロン６フィルムの印刷層４の印刷面にドライラミネートした。
引き続いて、外面上に第１層を溶融押出ラミネートした後、引き続いて４０℃で４８時間エージングした後の該線状ポリエチレン面の第１層の特性を表５に示す。
本実施例では表５に示すようにＡとＢのサイズをそれぞれ変更した。
比較例９及び１０は本発明の範囲外の粒子サイズの添加剤を使用した場合の例を示した。得られたラミネートフィルムの特性を表５に示す。本実施例及び比較例９及び１０において無色ラミネート品の摩擦係数はそれぞれ０．１２、０．６２、０．０７であり、摩擦係数上昇比はそれぞれ１．０８、１．４４、１．４３であった。
A linear polyethylene having a melt index of 10.0 g / 10 min and a density of 0.910 g / cm 3 was used for the first layer, and A was prepared at a concentration of 3,000 ppm, B at a concentration of 1,200 ppm, and C at a concentration of 850 ppm. .
On the other hand, in the second layer, A was 0 ppm, B was 500 ppm, and C was 50 ppm.
The film has a structure of 30 μm for both the first layer and the second layer.
Then, as shown in FIG. 2, the second layer 2 was dry-laminated on the printing surface of the printing layer 4 of the nylon 6 film on which the third layer 3 was printed.
Table 5 shows the characteristics of the first layer on the linear polyethylene surface after melt extrusion lamination of the first layer on the outer surface and subsequent aging at 40 ° C. for 48 hours.
In this embodiment, the sizes of A and B were changed as shown in Table 5.
Comparative Examples 9 and 10 show examples in which additives having a particle size outside the range of the present invention were used. Table 5 shows the properties of the obtained laminate film. In this example and comparative examples 9 and 10, the friction coefficients of the colorless laminates were 0.12, 0.62, and 0.07, respectively, and the friction coefficient increase ratios were 1.08, 1.44, and 1.43, respectively. there were.
上記結果よりＡのサイズはほぼ５μｍ未満ではブロッキング問題が顕在化し、摩擦係数特に多色印刷後の特性が悪く、口開き性、耐スクラッチ性などが悪く実用上好ましくない結果となった。またＡの大きさが１５μｍを超え、且つＢの大きさが２０μｍを超えた場合は、滑性特に多色印刷後の特性、アンチブロッキング性、耐熱性は優れているものの、耐スクラッチ性、ラミネート強度、ヒートシール強度が低下するために特性バランスから実用性に乏しくなる。 From the above results, when the size of A is less than about 5 μm, the blocking problem becomes apparent, the coefficient of friction, particularly the characteristics after multicolor printing, is poor, the mouth opening property and the scratch resistance are poor, and the results are not practically preferable. If the size of A exceeds 15 μm and the size of B exceeds 20 μm, the slipperiness, especially the characteristics after multicolor printing, anti-blocking property and heat resistance are excellent, but scratch resistance, laminate Since the strength and heat seal strength are lowered, the practicality is poor from the balance of properties.
以上のように本発明により、以下の効果がもたらされることを確認した。 As described above, it was confirmed that the following effects were brought about by the present invention.
透明性：本来易滑性、アンチブロッキング性を改良するためにはその反対に透明性が悪化する。本発明は可視光線領域の波長をよく透過する滑剤構成が得られたために透明性の悪化は最小限にした上で、表記の通りの面特性が得られた。 Transparency: In order to improve the slipperiness and anti-blocking properties, the transparency deteriorates on the contrary. According to the present invention, since a lubricant composition that transmits light in the visible light region well was obtained, the surface characteristics as described were obtained while minimizing the deterioration of transparency.
アンチブロッキング性：本発明では滑剤粉末の散布がなくても十分な滑性とアンチブロッキング性が多色印刷においても達成できた。この結果長期の保管、在庫、流通条件の変動に対してオールシーズンの品質安定性が確保できることがわかった。
特に多色印刷で滑性、アンチブロッキング性が良好であることは、本発明により初めて得られた特性である。印刷がない場合は、多色印刷品で得られた特性を凌ぐことは無論である。
Anti-blocking property: In the present invention, sufficient lubricity and anti-blocking property can be achieved even in multicolor printing without spraying of lubricant powder. As a result, it was found that the quality stability of all seasons can be secured against long-term storage, inventory, and fluctuations in distribution conditions.
In particular, good slipperiness and antiblocking properties in multicolor printing are the characteristics obtained for the first time by the present invention. In the absence of printing, it is of course possible to surpass the characteristics obtained with multicolored printed products.
耐熱性：加熱水による殺菌処理において袋内面同士の融着ブロッキングは滑剤粉末を行わない本発明品で安定した結果が得られた。このために滑剤粉末を使用しなくても高温熱水処理も可能であり滑剤粉末の食品への移行もなく安心、安全を確保した包装体を提供できることがわかった。 Heat resistance: In the sterilization treatment with heated water, the fusion blocking between the bag inner surfaces gave stable results with the product of the present invention in which no lubricant powder was used. For this reason, it has been found that a high-temperature hot water treatment is possible without using a lubricant powder, and there is no migration of the lubricant powder to foods, and a package that ensures safety and security can be provided.
ラミネート強度：易滑性を得るために多量の滑剤を使用すると、特に長期経時によりラミネート強度が低下する問題が深刻である。
本発明品は第２層の滑剤設計が適正であるために、易滑性、アンチブロッキング性、良好な巻取性を確保した上で１年間の評価結果より長期安定した品質が確立できたことが証明できた。
Laminate strength: When a large amount of lubricant is used to obtain easy slipping, the problem that the laminate strength decreases particularly with long-term aging is serious.
Since the second layer lubricant design is appropriate for this product, it was possible to establish a long-term stable quality from the evaluation results for one year after ensuring easy slipping, anti-blocking properties, and good winding properties. Was proved.
口開き性：この問題は線状ポリエチレンフィルム単独では良好な特性を示す場合でも、多色印刷、ラミネート加工により著しく悪化する。
本発明品は５色印刷でも容易な口開き性を示し、消費者が開封しやすいことを確認した。
Opening property: This problem is greatly exacerbated by multicolor printing and laminating even when the linear polyethylene film alone exhibits good properties.
The product of the present invention showed easy opening even with 5-color printing, and it was confirmed that it was easy for consumers to open.
耐スクラッチ性：実施例及び比較例より明らかな通り、滑剤粉末を散布しないため極めてスクラッチが発生しにくい利点が認められた。滑剤粉末は滑性、アンチブロッキング性を改良するものの、フィルム表面に擦傷を発生させ、耐スクラッチ性では明らかに劣ることが実証された。 Scratch resistance: As apparent from the examples and comparative examples, an advantage that scratches are hardly generated was observed because the lubricant powder was not sprayed. Although the lubricant powder improves lubricity and anti-blocking properties, it was proved that the film surface was scratched and the scratch resistance was clearly inferior.
内容物の浸み出しテスト：袋に充填した液状内容物は充填直後は確認できなかったが、２週間加圧状態で吸取紙上に放置したテストから、内容物が凍み出てくることが確認できた。
滑剤粉末を使用する場合は全ての袋から浸み出ることはなかったが、１００袋中３袋から浸み出し、更に圧力を５ｋｇかけた場合は１００袋中１２袋から浸み出した。
本発明品は滑剤粉末を全く使用していないため、袋のヒートシール巾、約１０ｍｍが完全に夾雑物がない完全密封状態であるために全て浸み出しが認められなかった。
Content leaching test: The liquid content filled in the bag could not be confirmed immediately after filling, but it was confirmed that the content frosted out from the test that was left on the blotting paper under pressure for 2 weeks. It was.
When the lubricant powder was used, it did not ooze out from all the bags, but it oozed out of 3 bags out of 100 bags, and further oozed out of 12 bags out of 100 bags when 5 kg of pressure was applied.
Since the product of the present invention did not use any lubricant powder, no seepage was observed because the heat seal width of the bag, about 10 mm, was completely sealed with no impurities.
以上、本発明について説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。 Although the present invention has been described above, the present invention is not limited to the configuration described in the above embodiment, and the configuration can be changed as appropriate without departing from the spirit of the present invention.
本発明の線状ポリエチレンフィルムは、高速充填包装性、低温シール性を要求しながら矛盾する高温殺菌処理などで求められる耐熱性との両立、非汚染性、安全性、省材料化などの要求を満足できるものであることから、食品、飲料、医薬品、工業用製品、繊維製品包装などの各種用途に好適に用いることができる。 The linear polyethylene film of the present invention has demands for compatibility with heat resistance required for high-temperature sterilization treatment, contradiction, safety, and material saving, while requiring high-speed filling and packaging properties and low-temperature sealing properties. Since it is satisfactory, it can be suitably used for various applications such as foods, beverages, pharmaceuticals, industrial products, and textile product packaging.
１ ヒートシール層（第１層）
２ 線状ポリエチレン樹脂層（第２層）
３ 第３層
４ 印刷層
1 Heat seal layer (first layer)
2 Linear polyethylene resin layer (second layer)
3 Third layer 4 Print layer
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011240327A JP5847541B2 (en) | 2011-11-01 | 2011-11-01 | Film made of linear polyethylene |
Applications Claiming Priority (1)
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| JP2011240327A JP5847541B2 (en) | 2011-11-01 | 2011-11-01 | Film made of linear polyethylene |
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| JP5847541B2 JP5847541B2 (en) | 2016-01-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020217931A1 (en) * | 2019-04-26 | 2020-10-29 | 東洋紡株式会社 | Polyethylene-based resin film |
| WO2021070614A1 (en) * | 2019-10-07 | 2021-04-15 | Dic株式会社 | Printed matter and laminate |
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| JPH03213339A (en) * | 1989-11-30 | 1991-09-18 | Imperial Chem Ind Plc <Ici> | Multi-layer polyolefin film |
| JPH06312491A (en) * | 1993-03-04 | 1994-11-08 | Kohjin Co Ltd | Polyethylene multilayer film |
| JPH08276551A (en) * | 1995-02-10 | 1996-10-22 | Toyobo Co Ltd | Linear low density polyethylenic composite film |
| JPH1081764A (en) * | 1996-09-06 | 1998-03-31 | Toyobo Co Ltd | Linear low-density polyethylene-based film |
| JP2001334617A (en) * | 2000-05-25 | 2001-12-04 | Sekisui Chem Co Ltd | Sealant film for lamination, composite film and composite packaging bag |
| JP2003237827A (en) * | 2002-02-15 | 2003-08-27 | Toyobo Co Ltd | Packaging film, and packaging body |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213339A (en) * | 1989-11-30 | 1991-09-18 | Imperial Chem Ind Plc <Ici> | Multi-layer polyolefin film |
| JPH06312491A (en) * | 1993-03-04 | 1994-11-08 | Kohjin Co Ltd | Polyethylene multilayer film |
| JPH08276551A (en) * | 1995-02-10 | 1996-10-22 | Toyobo Co Ltd | Linear low density polyethylenic composite film |
| JPH1081764A (en) * | 1996-09-06 | 1998-03-31 | Toyobo Co Ltd | Linear low-density polyethylene-based film |
| JP2001334617A (en) * | 2000-05-25 | 2001-12-04 | Sekisui Chem Co Ltd | Sealant film for lamination, composite film and composite packaging bag |
| JP2003237827A (en) * | 2002-02-15 | 2003-08-27 | Toyobo Co Ltd | Packaging film, and packaging body |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020217931A1 (en) * | 2019-04-26 | 2020-10-29 | 東洋紡株式会社 | Polyethylene-based resin film |
| CN113767137A (en) * | 2019-04-26 | 2021-12-07 | 东洋纺株式会社 | Polyethylene resin film |
| CN113767137B (en) * | 2019-04-26 | 2023-12-22 | 东洋纺株式会社 | Polyethylene resin film |
| WO2021070614A1 (en) * | 2019-10-07 | 2021-04-15 | Dic株式会社 | Printed matter and laminate |
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| JP5847541B2 (en) | 2016-01-27 |
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