CN106433001A - 环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法和应用 - Google Patents

环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法和应用 Download PDF

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CN106433001A
CN106433001A CN201610852294.XA CN201610852294A CN106433001A CN 106433001 A CN106433001 A CN 106433001A CN 201610852294 A CN201610852294 A CN 201610852294A CN 106433001 A CN106433001 A CN 106433001A
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cyclic olefine
olefine copolymer
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陆荣林
吕江鹏
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Abstract

本发明涉及一种环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法和应用，属于薄膜技术领域。该环烯烃共聚物改性聚烯烃复合阻水软包装材料包括按照质量百分比计的如下组分：环烯烃共聚物40‑55%、聚乙烯35‑45%、改性聚丙烯2‑15%、乙烯‑辛烯共聚物2‑8%，各组分之和总计为100%。本发明中环烯烃共聚物、聚乙烯和改性聚丙烯的共混使用，可以有效提高制得的软包装材料的物理性能和阻水性能，而使用乙烯‑辛烯共聚物则可以提高环烯烃共聚物、聚乙烯和改性聚丙烯的相容性，从而提高材料的加工稳定性，同时，本发明制得的软包装材料具有优异的耐撕裂性能，不易碎裂。

Description

环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法 和应用
技术领域
本发明属于薄膜技术领域，具体涉及一种环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法和应用。
背景技术
聚烯烃材料包括低密度聚乙烯、高密度聚乙烯、线形低密度聚乙烯和聚丙烯等被广泛应用的高分子材料，是一种性能优异的环保材料，近年来，其发展速度很快，被广泛应用在薄膜、柔性塑料制品、管材及发泡材料等方面。目前聚烯烃材料的发展主要趋向于环保性的提升及功能性的完善。
环烯烃共聚物是一种由环烯烃与α-烯烃共聚而成的无定型热塑性塑料，其具有优良的耐热性、耐化学性及熔体流动性等性能，被广泛应用于光电学、医药、电子器件等方面，环烯烃虽然具有诸多优点，但是其作为膜原料时成膜坚硬无法单独成膜，必须依附聚烯烃来共同成膜。
将环烯烃共聚物与聚烯烃材料共用，可赋予聚烯烃更好的包装性能，可以在不增加粘合层时增加聚烯烃包装袋材料的模量、热稳定性、耐热性和阻隔性能，虽然环烯烃共聚物与聚乙烯具有较好的相容性，但是存在易碎裂的不足，同时，现有的环烯烃共聚物与聚烯烃复合膜在包装含水食品时，其阻水性较差，导致含水食品容易变质，保存时间较短。因此，寻找一种具有优异物理性能、具有高阻水性、稳定性好且易于加工的环烯烃共聚物改性聚烯烃软包装材料就显得尤为重要。
发明内容
本发明的目的是为了解决现有技术的不足，而提供一种环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法和应用，该软包装材料具有优异的物理性能，高阻水性能和良好的加工稳定性。
本发明采用如下技术方案：
环烯烃共聚物改性聚烯烃复合阻水软包装材料，包括按照质量百分比计的如下组分：环烯烃共聚物40-55％、聚乙烯35-45％、改性聚丙烯2-15％、乙烯-辛烯共聚物2-8％，各组分之和总计为100％。
更进一步地，所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其中所述聚乙烯为茂金属线型低密度聚乙烯。
更进一步地，所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其中所述改性聚丙烯为聚丙烯和有机添加剂的熔融挤出物，其中所述聚丙烯和有机添加剂的质量比为20：1。
更进一步地，所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其中所述聚丙烯为均聚聚丙烯PPH。
更进一步地，所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其中所述有机添加剂为苯甲酸钠和木质素的混合物，苯甲酸钠和木质素的质量比为1:1。
本发明还提供一种所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料的制备方法，包括如下步骤：按照所述配比，将环烯烃共聚物、聚乙烯、改性聚丙烯和乙烯-辛烯共聚物混合均匀，于180-190℃下吹塑成型，即得所述环烯烃共聚物改性聚烯烃复合阻水软包装材料。
本发明制得的环烯烃共聚物改性聚烯烃复合阻水软包装材料在制备阻水包装袋中的应用。
本发明与现有技术相比，其有益效果为：
本发明将环烯烃共聚物、聚乙烯、改性聚丙烯和乙烯-辛烯共聚物进行复合共混，通过吹塑成型制得软包装材料，环烯烃共聚物、聚乙烯和改性聚丙烯的共混使用，可以有效提高制得的软包装材料的物理性能和阻水性能，而使用乙烯-辛烯共聚物则可以提高环烯烃共聚物、聚乙烯和改性聚丙烯的相容性，从而提高材料的加工稳定性，同时，申请人对聚丙烯进行物理改性，采用苯甲酸钠和木质素的混合物进行改性，提高了聚丙烯的力学性能，使制得的软包装材料具有优异的耐撕裂性能，不易碎裂。
具体实施方式
下面结合实施例对本发明作进一步的详细描述。
本领域技术人员将会理解，下列实施例仅用于说明本发明，而不应视为限定本发明的范围。本发明使用的聚乙烯为茂金属线型低密度聚乙烯，使用均聚聚丙烯PPH进行改性。
实施例1
环烯烃共聚物改性聚烯烃复合阻水软包装材料，包括按照质量百分比计的如下组分：环烯烃共聚物55％、聚乙烯35％、改性聚丙烯2％、乙烯-辛烯共聚物8％。其中所述改性聚丙烯为聚丙烯和有机添加剂的熔融挤出物，具体为：将苯甲酸钠、木质素和聚丙烯共混后，于180-185℃下熔融挤出，即得改性聚丙烯。聚丙烯：(苯甲酸钠和木质素混合物)的质量比为20:1，苯甲酸钠：木质素的质量比为1:1。
所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料的制备方法，包括如下步骤：按照所述配比，将环烯烃共聚物、聚乙烯、改性聚丙烯和乙烯-辛烯共聚物混合均匀，于185℃下吹塑成型，即得所述环烯烃共聚物改性聚烯烃复合阻水软包装材料。
实施例2
环烯烃共聚物改性聚烯烃复合阻水软包装材料，包括按照质量百分比计的如下组分：环烯烃共聚物40％、聚乙烯45％、改性聚丙烯9％、乙烯-辛烯共聚物6％。其中所述改性聚丙烯为聚丙烯和有机添加剂的熔融挤出物，具体为：将苯甲酸钠、木质素和聚丙烯共混后，于185℃下熔融挤出，即得改性聚丙烯。聚丙烯：(苯甲酸钠和木质素混合物)的质量比为20:1，苯甲酸钠：木质素的质量比为1:1。
所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料的制备方法，包括如下步骤：按照所述配比，将环烯烃共聚物、聚乙烯、改性聚丙烯和乙烯-辛烯共聚物混合均匀，于180℃下吹塑成型，即得所述环烯烃共聚物改性聚烯烃复合阻水软包装材料。
实施例3
环烯烃共聚物改性聚烯烃复合阻水软包装材料，包括按照质量百分比计的如下组分：环烯烃共聚物43％、聚乙烯40％、改性聚丙烯15％、乙烯-辛烯共聚物2％。其中所述改性聚丙烯为聚丙烯和有机添加剂的熔融挤出物，具体为：将苯甲酸钠、木质素和聚丙烯共混后，于180℃下熔融挤出，即得改性聚丙烯。聚丙烯：(苯甲酸钠和木质素混合物)的质量比为20:1，苯甲酸钠：木质素的质量比为1:1。
所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料的制备方法，包括如下步骤：按照所述配比，将环烯烃共聚物、聚乙烯、改性聚丙烯和乙烯-辛烯共聚物混合均匀，于190℃下吹塑成型，即得所述环烯烃共聚物改性聚烯烃复合阻水软包装材料。
对本发明实施例1至3所得环烯烃共聚物改性聚烯烃复合阻水软包装材料进行性能检测，其中，用制得的包装材料包装含水食品，检测其水汽渗透量，测试结果如下表1：
表1性能测试数据
测试项目(厚度50u) 实施例1 实施例2 实施例3
水汽渗透量，g/(m2·24h) 0.92 0.81 0.72
横向拉伸强度，MPa 40.2 41.3 40.7
纵向拉伸强度，MPa 42.8 43.2 42.9
横向拉伸断裂伸长率，％ 162 160 163
纵向拉伸断裂伸长率，％ 179 181 185
本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (7)

1.环烯烃共聚物改性聚烯烃复合阻水软包装材料，其特征在于，包括按照质量百分比计的如下组分：环烯烃共聚物40-55%、聚乙烯35-45%、改性聚丙烯2-15%、乙烯-辛烯共聚物2-8%，各组分之和总计为100%。
2.根据权利要求1所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其特征在于，所述聚乙烯为茂金属线型低密度聚乙烯。
3.根据权利要求1所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其特征在于，所述改性聚丙烯为聚丙烯和有机添加剂的熔融挤出物，其中所述聚丙烯和有机添加剂的质量比为20：1。
4.根据权利要求3所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其特征在于，所述聚丙烯为均聚聚丙烯PPH。
5.根据权利要求3所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料，其特征在于，所述有机添加剂为苯甲酸钠和木质素的混合物，苯甲酸钠和木质素的质量比为1:1。
6.权利要求1所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料的制备方法，其特征在于，包括如下步骤：按照所述配比，将环烯烃共聚物、聚乙烯、改性聚丙烯和乙烯-辛烯共聚物混合均匀，于180-190℃下吹塑成型，即得所述环烯烃共聚物改性聚烯烃复合阻水软包装材料。
7.权利要求1所述的环烯烃共聚物改性聚烯烃复合阻水软包装材料在制备阻水包装袋中的应用。
CN201610852294.XA 2016-09-27 2016-09-27 环烯烃共聚物改性聚烯烃复合阻水软包装材料及其制备方法和应用 Pending CN106433001A (zh)

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