JP2017209900A - Polyamide film - Google Patents
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- JP2017209900A JP2017209900A JP2016105348A JP2016105348A JP2017209900A JP 2017209900 A JP2017209900 A JP 2017209900A JP 2016105348 A JP2016105348 A JP 2016105348A JP 2016105348 A JP2016105348 A JP 2016105348A JP 2017209900 A JP2017209900 A JP 2017209900A
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- 229920002647 polyamide Polymers 0.000 title claims abstract description 26
- 239000004952 Polyamide Substances 0.000 title claims abstract description 17
- 239000004953 Aliphatic polyamide Substances 0.000 claims abstract description 28
- 229920003231 aliphatic polyamide Polymers 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 17
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims description 12
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- -1 metaxylene adipamide Chemical compound 0.000 claims description 7
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 6
- 239000000347 magnesium hydroxide Substances 0.000 claims description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 5
- IVSZLXZYQVIEFR-UHFFFAOYSA-N 1,3-Dimethylbenzene Natural products CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011342 resin composition Substances 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 101000576320 Homo sapiens Max-binding protein MNT Proteins 0.000 abstract description 29
- 229920006121 Polyxylylene adipamide Polymers 0.000 abstract description 29
- 238000000034 method Methods 0.000 abstract description 19
- 238000001125 extrusion Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000007334 copolymerization reaction Methods 0.000 abstract description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 4
- 238000004898 kneading Methods 0.000 abstract description 3
- 239000000470 constituent Substances 0.000 abstract description 2
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 6
- 229910001882 dioxygen Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 3
- 150000001342 alkaline earth metals Chemical class 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000012756 surface treatment agent Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229920006233 biaxially oriented polyamide Polymers 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 239000003484 crystal nucleating agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- UHXUZOCRWCRNSJ-QPJJXVBHSA-N methomyl Chemical compound CNC(=O)O\N=C(/C)SC UHXUZOCRWCRNSJ-QPJJXVBHSA-N 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本発明は、メタキシリレンジアミンとアジピン酸との重縮合反応で生成する構造単位からなるポリアミド(以下、「MXD6」とする)を主成分とする、ポリアミド系フィルムで、優れた透明性、実用強度を有し、押出温度や滞留時間やせん断速度等の生産条件に影響されることなく、安定して生産することができる二軸延伸ポリアミドフィルムに関するものである。 The present invention is a polyamide-based film mainly composed of a polyamide (hereinafter referred to as “MXD6”) composed of a structural unit formed by a polycondensation reaction of metaxylylenediamine and adipic acid, and has excellent transparency and practical use. The present invention relates to a biaxially stretched polyamide film that has strength and can be stably produced without being affected by production conditions such as extrusion temperature, residence time, and shear rate.
従来より、ポリアミド系重合体の未延伸フィルムまたは延伸フィルムは、単独で、または他のフイルムと積層して、種々の包装材料として利用されている。しかしながら、普通に利用されている脂肪族ポリアミド重合体単独よりなるフィルムは、引っ張り強度、耐屈曲ピンホール性等の機械的性質においては優れているが、酸素ガスバリヤ性においては充分でないという欠点がある。他方、酸素ガスバリヤ性が良好なフィルムとして、m−および/またはp−キシリレンジアミンと炭素数6〜12のα,ωー脂肪族ジカルボン酸とからなるポリアミド構成単位を主成分とする芳香族ポリアミド重合体を原料としたものが提案されている。このフィルムは、透明性、耐油性においては優れているが、耐屈曲性に劣っているために、その用途には制限があった。 Conventionally, unstretched films or stretched films of polyamide-based polymers have been used as various packaging materials, either alone or laminated with other films. However, a film made of a commonly used aliphatic polyamide polymer alone is excellent in mechanical properties such as tensile strength and bending pinhole resistance, but has a drawback that it is not sufficient in oxygen gas barrier properties. . On the other hand, as a film having a good oxygen gas barrier property, an aromatic polyamide whose main component is a polyamide constituent unit composed of m- and / or p-xylylenediamine and an α, ω-aliphatic dicarboxylic acid having 6 to 12 carbon atoms. Those using polymers as raw materials have been proposed. Although this film is excellent in transparency and oil resistance, its use is limited because it is inferior in bending resistance.
上記双方のポリアミド系重合体の利点、すなわち引っ張り強度、耐屈曲性、および酸素ガスバリヤ性に優れているという性質を併せて具備したフィルムを得るために、2種類のポリアミド系重合体を別々に溶融押出して、インフレーション法により積層二軸延伸フィルムを製造する方法が提案されている(特許文献1)。また、脂肪族ポリアミド重合体を主成分とした層の間に、芳香族ポリアミド重合体を主成分とした層を挟み込む構造の積層フィルムについても提案されている(特許文献2)。 In order to obtain a film that combines the advantages of both the above-mentioned polyamide polymers, that is, the properties of excellent tensile strength, flex resistance, and oxygen gas barrier properties, the two polyamide polymers are melted separately. A method of producing a laminated biaxially stretched film by extrusion and an inflation method has been proposed (Patent Document 1). A multilayer film having a structure in which a layer mainly composed of an aromatic polyamide polymer is sandwiched between layers composed mainly of an aliphatic polyamide polymer has also been proposed (Patent Document 2).
他方、脂肪族ポリアミド樹脂とMXD6の混合により易引裂き性を付与する方法がある。脂肪族ポリアミドとMXD6を脂肪族ポリアミド/MXD6=40〜85重量部/15〜60重量部のからなる混合ポリアミド組成物を溶融押出し、インフレーション法を用いて、長手方向(MD)、巾方向(TD)共に2.8倍以上に延伸した易引裂き性フィルムが複数層の1層として形成されたランネートフイルムや(特許文献3、特許文献4)、脂肪族ポリアミド/MXD6=80〜95重量部/20〜5重量部の混合物からなり、MXD6の分散粒子の形状を特定の形状に分散させた引裂き直進性を有する二軸配向ポリアミドフィルムが提案されている(特許文献5) On the other hand, there is a method of imparting easy tearability by mixing an aliphatic polyamide resin and MXD6. A mixed polyamide composition composed of aliphatic polyamide / MXD6 and aliphatic polyamide / MXD6 = 40 to 85 parts by weight / 15 to 60 parts by weight is melt-extruded, and the longitudinal direction (MD) and the width direction (TD) are obtained by using an inflation method. ) Both lannate films in which easily tearable films stretched by 2.8 times or more are formed as one layer (Patent Documents 3 and 4), aliphatic polyamide / MXD6 = 80 to 95 parts by weight / 20 A biaxially oriented polyamide film composed of ˜5 parts by weight of a mixture and having a straight tearing property in which the shape of dispersed particles of MXD6 is dispersed in a specific shape has been proposed (Patent Document 5).
しかし、易引裂き性を発現するためには、MXD6が脂肪族ポリアミド中に適度に分散している必要があるが、脂肪族ポリアミドとMXD6を溶融混合すると高温の場合や滞留時間が長くなる場合、若しくはせん断が大きくかかる場合は脂肪族ポリアミドとMXD6の共重合反応が進み、MXD6の分散粒子が消失し、易引裂き性だけでなく、引張強度や衝撃強度、突刺強度や酸素ガスバリヤ性などの物性が低下するという問題があり、押出機の種類、スクリュータイプ、押出機ホッパーからダイまでの距離、フィルム製膜時の押出条件(温度、速度、回転数、フィルターメッシュなど)の面で制約が大きかった。 However, in order to express easy tearability, MXD6 needs to be appropriately dispersed in the aliphatic polyamide. However, when the aliphatic polyamide and MXD6 are melt-mixed, if the temperature is high or the residence time is long, Alternatively, when shearing is large, the copolymerization reaction of aliphatic polyamide and MXD6 proceeds, and the dispersed particles of MXD6 disappear, and not only easy tearability but also physical properties such as tensile strength, impact strength, puncture strength and oxygen gas barrier properties There was a problem of lowering, and there were large restrictions in terms of extruder type, screw type, distance from the extruder hopper to the die, and extrusion conditions (temperature, speed, rotation speed, filter mesh, etc.) during film formation. .
上記の通り、MXD6と脂肪族ポリアミドが溶融混合すると共重合反応が進みフィルムの強度物性に影響を与えるため、MXD6と脂肪族ポリアミドを溶融押出し、インフレーション法により積層二軸延伸フィルムを製造する場合、押出機の種類、スクリュータイプ、押出機ホッパーからダイまでの距離、フィルム製膜時の押出条件(温度、速度、回転数、フィルターメッシュなど)の面で制約が大きかった。
As described above, when MXD6 and aliphatic polyamide are melt-mixed, the copolymerization reaction proceeds and affects the strength physical properties of the film. Therefore, when MXD6 and aliphatic polyamide are melt-extruded and a laminated biaxially stretched film is produced by an inflation method, The restrictions were large in terms of the type of extruder, screw type, distance from the extruder hopper to the die, and extrusion conditions (temperature, speed, rotation speed, filter mesh, etc.) during film formation.
そこで本発明の課題は、MXD6を主成分とするポリアミド系フィルムにおいて、優れた透明性、実用強度を有し、押出温度や滞留時間やせん断速度等の生産条件に影響されることなく、安定して生産することができる二軸延伸ポリアミドフィルムを得ることを課題とする。 Therefore, the problem of the present invention is that the polyamide-based film containing MXD6 as a main component has excellent transparency and practical strength, and is stable without being affected by production conditions such as extrusion temperature, residence time, and shear rate. It is an object of the present invention to obtain a biaxially stretched polyamide film that can be produced.
溶融混練時にアルカリ土類金属の酸化物又は水酸化物を共押出することで、脂肪族ポリアミドとMXD6との共重合反応を抑制でき、フィルムの製造装置や生産条件に影響されずかつ簡便な方法で安定的に生産できることを見いだし本発明を完成させた。 Co-extrusion of alkaline earth metal oxide or hydroxide during melt kneading can suppress the copolymerization reaction between aliphatic polyamide and MXD6, and is a simple method that is not affected by film production equipment or production conditions Thus, the present invention has been completed.
具体的には、
(1)メタキシレンアジパミド100〜65重量部と脂肪族ポリアミド0〜35重量部とからなるポリアミド系樹脂100重量部に対してアルカリ土類金属の酸化物又は水酸化物0.01〜0.50重量部添加した樹脂組成物からなる中間層と1層以上のメタキシレンアジパミド60〜0重量部と脂肪族ポリアミド100〜40重量部とからなるポリアミド系樹脂100重量部に対してアルカリ土類金属の酸化物又は水酸化物0.01〜0.50重量部添加した樹脂組成物からなる外層を有する二軸延伸ポリアミドフィルム。
(2)請求項1記載のアルカリ土類金属の酸化物又は水酸化物が水酸化マグネシウム、酸化マグネシウムであることを特徴とする2軸延伸ポリアミドフィルム
を提供する。
In particular,
(1) 0.01 to 0 alkaline earth metal oxide or hydroxide with respect to 100 parts by weight of a polyamide-based resin composed of 100 to 65 parts by weight of metaxylene adipamide and 0 to 35 parts by weight of an aliphatic polyamide Alkaline with respect to 100 parts by weight of a polyamide-based resin composed of an intermediate layer composed of a resin composition added with 50 parts by weight, 60 to 0 parts by weight of one or more metaxylene adipamides and 100 to 40 parts by weight of an aliphatic polyamide A biaxially stretched polyamide film having an outer layer made of a resin composition to which 0.01 to 0.50 parts by weight of an earth metal oxide or hydroxide is added.
(2) A biaxially stretched polyamide film is provided wherein the alkaline earth metal oxide or hydroxide according to claim 1 is magnesium hydroxide or magnesium oxide.
本発明によると、MXD6を主成分とするポリアミド系フィルムにおいて、優れた透明性、実用強度を有し、押出温度や滞留時間やせん断速度等の生産条件に影響されることなく、安定して生産することができる。
According to the present invention, a polyamide-based film containing MXD6 as a main component has excellent transparency and practical strength, and is stably produced without being affected by production conditions such as extrusion temperature, residence time, and shear rate. can do.
本発明において使用される脂肪族ポリアミドは特に制限はないが、ナイロン6、ナイロン66、ナイロン46、ナイロン610、ナイロン12などの脂肪族ポリアミドであり、これらの熱可塑性樹脂は単独重合体であっても共重合体であってもよい。また、ナイロン6原料において、数平均分子量は10000〜30000が好ましく、特に好ましくは22000〜24000である。数平均分子量が10000未満の場合、得られたONyフィルムの衝撃強度や引張強度が不十分である。また数平均分子量が30000より大きい場合、分子鎖の絡み合いが著しく、延伸加工により過度なひずみが生じるため、延伸加工時に破断やパンクが頻繁に発生し、安定的に生産出来ない。 The aliphatic polyamide used in the present invention is not particularly limited, but is an aliphatic polyamide such as nylon 6, nylon 66, nylon 46, nylon 610, nylon 12, and these thermoplastic resins are homopolymers. May also be a copolymer. In the nylon 6 raw material, the number average molecular weight is preferably 10,000 to 30,000, particularly preferably 22,000 to 24,000. When the number average molecular weight is less than 10,000, the impact strength and tensile strength of the obtained ONy film are insufficient. When the number average molecular weight is larger than 30000, the molecular chain is entangled excessively and excessive strain is generated by the stretching process. Therefore, breakage and puncture frequently occur during the stretching process, and stable production cannot be achieved.
また、本発明において用いられるMXD6は、メタキシリレンジアミンとアジピン酸との重縮合反応で生成する構造単位を有したものであり、この熱可塑性樹脂は単独重合体であっても共重合体であってもよい。 MXD6 used in the present invention has a structural unit generated by a polycondensation reaction of metaxylylenediamine and adipic acid. This thermoplastic resin may be a homopolymer or a copolymer. There may be.
少なくとも1つの中間層は、MXD6と脂肪族ポリアミドの混合量は、MXD6を100〜65重量部に対して、脂肪族ポリアミド0〜35重量部の構成である。外層は、MXD6を60〜0重量部と脂肪族ポリアミドを100〜40重量部の構成である。 In the at least one intermediate layer, the mixing amount of MXD6 and aliphatic polyamide is such that MXD6 is 100 to 65 parts by weight and aliphatic polyamide is 0 to 35 parts by weight. The outer layer is composed of 60 to 0 parts by weight of MXD6 and 100 to 40 parts by weight of aliphatic polyamide.
本発明においては中間層及び外層に用いるMXD6と脂肪族ポリアミドの混合量が上記の混合量であれば、脂肪族ポリアミドとMXD6とが互いに混合され溶融混練された履歴をもつ混合原料であってもよい。 In the present invention, if the mixing amount of MXD6 and aliphatic polyamide used for the intermediate layer and outer layer is the above mixing amount, even if the mixed raw material has a history of mixing and melt-kneading the aliphatic polyamide and MXD6. Good.
本発明において使用するアルカリ土類金属の酸化物又は水酸化物に特に制限はないが、ベリリウム、マグネシウム、カルシウム、ストロンチウム、バリウムの酸化物又は水酸化物が使用できる。特に、酸化マグネシウム、水酸化マグネシウムが好ましい。これらの酸化物又は水酸化物は、単独で使用又は複数併用して使用することも可能であり、同じ種類で、平均粒子径、比表面積が異なる粒子を複数併用してもかまわない。 Although there is no restriction | limiting in particular in the alkaline earth metal oxide or hydroxide used in this invention, The oxide or hydroxide of beryllium, magnesium, calcium, strontium, barium can be used. In particular, magnesium oxide and magnesium hydroxide are preferable. These oxides or hydroxides can be used alone or in combination of two or more, and a plurality of particles of the same type and different in average particle diameter and specific surface area may be used in combination.
本発明で用いるアルカリ土類金属の酸化物又は水酸化物は、MXD6を混合する外層及び中間層に添加する。添加する量は、脂肪族ポリアミドとMXD6との合計100重量部に対して0.01〜0.50重量部であり、0.02〜0.30重量部の範囲が好ましく、0.04〜0.25重量部の範囲がより好ましい。0.01重量部より少ないと、共重合抑制効果が得られず、0.50重量部よりも多いと透明性の低下や押出トラブルが発生することがある。 The alkaline earth metal oxide or hydroxide used in the present invention is added to the outer layer and the intermediate layer in which MXD6 is mixed. The amount to be added is 0.01 to 0.50 parts by weight with respect to a total of 100 parts by weight of the aliphatic polyamide and MXD6, preferably 0.02 to 0.30 parts by weight, and 0.04 to 0. A range of .25 parts by weight is more preferred. When the amount is less than 0.01 part by weight, the effect of inhibiting the copolymerization cannot be obtained, and when the amount is more than 0.50 part by weight, the transparency may be lowered or an extrusion trouble may occur.
本発明で用いるアルカリ土類金属の酸化物又は水酸化物の比表面積に特に制限はないが、BET法で求めた比表面積に対して、10〜500μm2/gが好ましく、20〜300μm2/gがさらに好ましい。300μm2/を超えると急速な吸湿を伴うことがあり、製造時の取り扱いが困難になることがある。 There is no particular limitation on the specific surface area of the oxide or hydroxide of an alkaline earth metal used in the present invention, with respect to the specific surface area determined by the BET method, is preferably 10~500μm 2 / g, 20~300μm 2 / g is more preferable. If it exceeds 300 μm 2 /, rapid moisture absorption may occur, and handling during production may be difficult.
本発明で用いるアルカリ土類金属の酸化物又は水酸化物の平均粒径に特に制限はないが、5μ以下であることが好ましく、1μ以下であることがより好ましい。 The average particle size of the alkaline earth metal oxide or hydroxide used in the present invention is not particularly limited, but is preferably 5 μm or less, more preferably 1 μm or less.
本発明で用いるアルカリ土類金属の酸化物又は水酸化物の表面処理として処理無しでも使用できるが、透明性が低下することがあるので、表面処理をしたものを使用するのが好ましい。表面処理剤、表面処理方法は、特に限定されるものではなく、公知の方法で良い。
例えば表面処理剤としては、シラン、チタンおよびアルミニウム系カップリング剤、高級脂肪酸および燐酸エステル、それらのアルカリ金属塩、多価アルコールと脂肪酸のエステル類等で表面処理したものが好適に利用できる。この際表面処理方法は、水またはアルコールなどの溶媒中にアルカリ土類金属の酸化物又は水酸化物を懸濁させ、20℃〜80℃に加温させる。その中に水またはアルコールなどの溶媒に溶解した表面処理剤溶液を注加した後固液分離し、洗浄して乾燥させる湿式方法、あるいはアルカリ土類金属の酸化物又は水酸化物の粉末を50℃〜150℃の温度で攪拌しながら、前記表面処理剤溶液を注加する乾式方法が挙げられる。
Although it can be used without treatment as the surface treatment of the alkaline earth metal oxide or hydroxide used in the present invention, it is preferable to use a surface-treated one because the transparency may be lowered. The surface treatment agent and the surface treatment method are not particularly limited, and may be a known method.
For example, as the surface treatment agent, those surface-treated with silane, titanium and aluminum coupling agents, higher fatty acids and phosphate esters, alkali metal salts thereof, esters of polyhydric alcohols and fatty acids, and the like can be suitably used. In this case, the surface treatment method involves suspending an alkaline earth metal oxide or hydroxide in a solvent such as water or alcohol and heating the suspension to 20 ° C to 80 ° C. A wet treatment method in which a surface treating agent solution dissolved in a solvent such as water or alcohol is poured into the solution, followed by solid-liquid separation, washing and drying, or an alkaline earth metal oxide or hydroxide powder 50 Examples include a dry method in which the surface treatment agent solution is added while stirring at a temperature of from ℃ to 150 ℃.
本発明で用いるアルカリ土類金属の酸化物又は水酸化物は分散性を向上させる目的で事前に脂肪族ポリアミド又はMXD6と溶融混練したものを使用してもよい。 The alkaline earth metal oxide or hydroxide used in the present invention may be previously melt-kneaded with aliphatic polyamide or MXD6 for the purpose of improving dispersibility.
本願は、少なくとも3層構成であり、3層構成の場合は、前段までの構成を有する1層の中間層と1層の外層で構成され、他の1層の外層は、任意に構成できる。5層構成の場合は、前段までの構成を任意に構成できる。例えば、最芯層に前段までの中間層の構成、中間層及び最外層を前段までの外層の構成、又は最芯層及び中間層を前段までの中間層、最外層を前段までの外層の構成とすることも可能である。 The present application has at least a three-layer structure. In the case of the three-layer structure, the present application is composed of one intermediate layer and one outer layer having the structure up to the preceding stage, and the other one outer layer can be arbitrarily configured. In the case of a five-layer configuration, the configuration up to the previous stage can be arbitrarily configured. For example, the structure of the intermediate layer up to the previous stage in the outermost layer, the structure of the outer layer up to the previous stage of the intermediate layer and the outermost layer, or the structure of the outer layer up to the previous stage, the outermost layer as the intermediate layer up to the previous stage. It is also possible.
ラミ強度の低下やフィルム製膜時の目ヤニ発生といった点で大きく支障をきたさない範囲で、必要に応じて通常配合される添加剤及び改質剤を配合することができる。例えば耐熱安定剤、紫外線吸収剤、光安定剤、酸化防止剤、帯電防止剤、粘着性付与剤、シール性改良剤、防曇剤、結晶核剤、離型剤、可塑剤、架橋剤、難燃剤および着色剤(顔料、染料など)、ゲル化抑制剤、耐ピン改質剤などが挙げられる。 Additives and modifiers that are usually blended can be blended as needed within a range that does not cause significant problems in terms of lowering the strength of the laminate or generating eyes when film is formed. For example, heat-resistant stabilizer, ultraviolet absorber, light stabilizer, antioxidant, antistatic agent, tackifier, sealability improver, antifogging agent, crystal nucleating agent, mold release agent, plasticizer, crosslinking agent, difficulty Examples include flame retardants and colorants (pigments, dyes, etc.), gelation inhibitors, pin resistance modifiers, and the like.
本発明のポリアミド系多層2軸延伸フィルムは、公知の方法により製造することができる。
例えば、各層を形成する樹脂を2〜3台の押出機により溶融し、フラットダイあるいは環状ダイから押し出した後、急冷することによりフラット状、あるいは環状の未延伸フィルムとし、テンター法による逐次2軸延伸、同時2軸延伸やチューブラ法による同時2軸延伸等の方法が挙げられる。
The polyamide-based multilayer biaxially stretched film of the present invention can be produced by a known method.
For example, the resin forming each layer is melted by 2 to 3 extruders, extruded from a flat die or an annular die, and then rapidly cooled to form a flat or annular unstretched film, which is sequentially biaxial by the tenter method. Examples thereof include stretching, simultaneous biaxial stretching, and simultaneous biaxial stretching by a tubular method.
延伸倍率はMD及びTD共、2〜6倍、好ましくは2.5〜4倍である。2倍未満では必要な強度物性が得られない。6倍より大きい延伸倍率では、延伸の安定性に欠け、フィルムの切断等トラブルが多くなる。 The draw ratio is 2 to 6 times, preferably 2.5 to 4 times for both MD and TD. If it is less than 2 times, the required strength properties cannot be obtained. If the draw ratio is larger than 6 times, the stretching stability is insufficient, and troubles such as film cutting increase.
二軸延伸後のフィルムは寸法安定性を良くするために、必要に応じ熱処理を施す。また、必要に応じて、コロナ放電処理をおこなってもよい。 The film after biaxial stretching is subjected to heat treatment as necessary in order to improve dimensional stability. Moreover, you may perform a corona discharge process as needed.
上記の方法で得られる本発明の二軸延伸ポリアミドフィルムの厚みは8〜50μm、好ましくは10〜30μmである。 The thickness of the biaxially stretched polyamide film of the present invention obtained by the above method is 8 to 50 μm, preferably 10 to 30 μm.
本発明の二軸延伸ポリアミドフィルムは、単独構成のフィルムであってもよいし、共押出やラミネートなどにより、他のフィルムを積層して使用することもできる。 The biaxially stretched polyamide film of the present invention may be a single film, or may be used by laminating other films by coextrusion or lamination.
本発明のポリアミドフィルムは優れた強靭性、耐ピンホール性、寸法安定性を有するので、包装袋用として好適である。本発明のフィルムを包装袋用として使用する場合、ヒートシール性、酸素ガスバリヤ性、意匠性などの付与のために、ポリプロピレン、ポリエチレン、エチレンー酢酸ビニル共重合体、若しくはポリエステルなどのフィルム、紙、又はアルミニウムなどの金属箔等を積層することが一般的である。このような場合であっても、本発明のフィルムが、少なくとも1層に有していれば良く、積層する数に制限はない。この包装袋は、優れた強靭性、耐ピンホール性、酸素ガスバリヤ性を有するため、スープ、ジャム、レルトパウチなどの食品をはじめ、医薬品、日用品、トイレタリーなどの包装袋として有用である。 Since the polyamide film of the present invention has excellent toughness, pinhole resistance and dimensional stability, it is suitable for packaging bags. When the film of the present invention is used for a packaging bag, a film such as polypropylene, polyethylene, ethylene-vinyl acetate copolymer, or polyester, paper, or the like, for imparting heat sealing properties, oxygen gas barrier properties, design properties, etc. It is common to laminate a metal foil such as aluminum. Even in such a case, the film of the present invention may have at least one layer, and the number of layers is not limited. Since this packaging bag has excellent toughness, pinhole resistance, and oxygen gas barrier properties, it is useful as a packaging bag for foods such as soups, jams, and relt pouches, as well as pharmaceuticals, daily necessities, toiletries and the like.
以下に、本発明を実施例によって具体的に説明するが、本発明はこれらの実施例に限定されるものではない。なお、衝撃強度の測定には、東洋精機社製インパクトテスターを用いた衝撃穴あけ強さ試験(JIS P8134)を行い評価し、10Kgf・cm以上であるものを◎、8〜10Kgf・cmであるものを○、8Kgf・cm以下であるものを×と評価した。
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. For the impact strength measurement, an impact drilling strength test (JIS P8134) using an impact tester manufactured by Toyo Seiki Co., Ltd. was used for evaluation, and those that were 10 kgf · cm or more were ◎, and those that were 8-10 kgf · cm. Were evaluated as x, and those having 8 kgf · cm or less were evaluated as x.
以下に、本願をさらに詳細に説明するため、実施例を記載する。ただし、本願発明は実施例に限定されるものではない。
実施例1
相対粘度3.5の脂肪族ポリアミド樹脂(脂肪族ポリアミド:宇部興産(株)製)と相対粘度2.7のMXD6(芳香族ポリアミド:三菱瓦斯化学(株)製)を80/20の割合で混合し、水酸化マグネシウム(キスマ5B:協和化学工業(株)製)を樹脂成分に対して400ppm添加した混合物をリングダイより300℃で溶融混練させた後に2つに分割し3層共押出しダイスの両外層へ導いた。また、MXD6、100重量部に対して水酸化マグネシウムを400ppm添加した混合物をリングダイより300℃で溶融混練させ3層共押出しダイスの中間層に導き、3層共押出しダイス内で外層:中間層:外層の厚み比が1:1:1となるよう積層させ、冷却後に厚さ150μmのチューブ状フィルムを得た。
該チューブフィルムを低速ニップロールと高速ニップロールの速度差及びその間に存在する空気圧によりM XD6のTg以上の温度でMD方向に3倍、TD方向に3倍の同時二軸延伸を行った後に、200℃で熱処理を行い、厚さ15μmのフィルムを得、その両耳を切除して平面フィルムとし、2本のロールに巻き取った。
In order to describe the present application in more detail below, examples will be described. However, the present invention is not limited to the examples.
Example 1
An aliphatic polyamide resin having a relative viscosity of 3.5 (aliphatic polyamide: manufactured by Ube Industries, Ltd.) and MXD6 having a relative viscosity of 2.7 (aromatic polyamide: manufactured by Mitsubishi Gas Chemical Co., Ltd.) at a ratio of 80/20. After mixing, a mixture obtained by adding 400 ppm of magnesium hydroxide (Kisuma 5B: manufactured by Kyowa Chemical Industry Co., Ltd.) to the resin component was melt-kneaded from a ring die at 300 ° C., and then divided into two and three-layer coextrusion dies Led to both outer layers. Further, MXD6, a mixture obtained by adding 400 ppm of magnesium hydroxide to 100 parts by weight is melt-kneaded from a ring die at 300 ° C., led to an intermediate layer of a three-layer coextrusion die, and an outer layer in the three-layer coextrusion die: intermediate layer : Laminated so that the thickness ratio of the outer layer was 1: 1: 1, and after cooling, a tubular film having a thickness of 150 μm was obtained.
The tube film was subjected to simultaneous biaxial stretching of 3 times in the MD direction and 3 times in the TD direction at a temperature equal to or higher than the Tx of MXD6 due to the speed difference between the low speed nip roll and the high speed nip roll and the air pressure existing therebetween, and then 200 ° C. The film was heat-treated to obtain a film having a thickness of 15 μm, and both ears were excised to form a flat film and wound around two rolls.
実施例2〜6及び比較例1〜6
混合比、押出溶融温度、アルカリ土類金属、アルカリ土類金属添加量を表1のように変更した以外は実施例1と同様にして延伸フィルムを得た。
得られた延伸フィルムの評価結果を表1に示す。
Examples 2-6 and Comparative Examples 1-6
A stretched film was obtained in the same manner as in Example 1, except that the mixing ratio, extrusion melting temperature, alkaline earth metal, and alkaline earth metal addition amount were changed as shown in Table 1.
The evaluation results of the obtained stretched film are shown in Table 1.
Claims (2)
0.01 to 0.50 of an alkaline earth metal oxide or hydroxide with respect to 100 parts by weight of a polyamide-based resin composed of 100 to 65 parts by weight of metaxylene adipamide and 0 to 35 parts by weight of an aliphatic polyamide. Alkaline earth with respect to 100 parts by weight of a polyamide-based resin composed of an intermediate layer composed of a resin composition with parts by weight added, 0 to 60 parts by weight of one or more layers of metaxylene adipamide and 40 to 100 parts by weight of an aliphatic polyamide A biaxially stretched polyamide film having an outer layer made of a resin composition added with 0.01 to 0.50 parts by weight of a metal oxide or hydroxide.
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JP2015136825A (en) * | 2014-01-21 | 2015-07-30 | ユニチカ株式会社 | gas barrier laminate |
JP2015150785A (en) * | 2014-02-14 | 2015-08-24 | ユニチカ株式会社 | polyamide laminate |
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JPS56155762A (en) * | 1980-05-07 | 1981-12-02 | Japan Styrene Paper Corp | Laminated sheet |
JPH04131237A (en) * | 1990-09-21 | 1992-05-01 | Kuraray Co Ltd | Multilayer packing body |
JP2015136825A (en) * | 2014-01-21 | 2015-07-30 | ユニチカ株式会社 | gas barrier laminate |
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