CN111995786A - 一种高耐候性节能环保膜及其制备方法 - Google Patents
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Abstract
一种高耐候性节能环保膜及其制备方法,包括薄膜层和位于薄膜层上面的离型层;薄膜层由以下重量份的组分组成:线型低密度聚乙烯80~100份、聚乳酸25~40份、乙烯‑醋酸乙烯共聚物25~30份、乙烯‑乙烯醇共聚物20~35份、聚乙烯醇18~25份、壳聚糖10~18份、碳酸钙10‑20份,稳定剂2‑3份、增塑剂10~13份,润滑剂3‑8份,降解促进剂2‑8份。本发明环保性好,使用寿命长,具有优良的力学性能。
Description
技术领域
本发明涉及一种膜,具体地说是一种高耐候性节能环保膜及其制备方法。
背景技术
聚氯乙烯,英文简称PVC(Polyvinyl chloride polymer=PVC分子结构),是由氯乙烯在引发剂作用下聚合而成的热塑性树脂,是氯乙烯的均聚物。氯乙烯均聚物和氯乙烯共聚物统称之为氯乙烯树脂。PVC为无定形结构的白色粉末,支化度较小。工业生产的PVC分子量一般在5万~12万范围内,具有较大的多分散性,分子量随聚合温度的降低而增加;无固定熔点,80~85℃开始软化,130℃变为粘弹态,160~180℃开始转变为粘流态;有较好的机械性能,抗张强度60MPa左右,冲击强度5~10kJ/m2。
PVC为微黄色半透明状,有光泽,透明度胜于聚乙烯、聚丙烯,差于聚苯乙烯,随助剂用量不同,分为软、硬聚氯乙烯,软制品柔而韧,手感粘,因此PVC膜被广泛应用于各个行业。
近年来,随着人们环保意识的提高,“白色污染”问题成为社会关注的热点。采用生物可降解材料用作包装膜无疑是解决该问题行之有效的方法。目前,生物可降解材料包括多糖如纤维素、变性淀粉、海藻酸钠、壳聚糖等以及蛋白质如大豆蛋白质、玉米蛋白质、小麦醇溶蛋白质和明胶等。这些降解材料主要用于水果保鲜、肉类保鲜、食品包装,并可直接食用。
传统的PVC薄膜难以处理,而且在生产过程中容易造成污染。
发明内容
为了解决上述的技术问题,本发明提供了一种高耐候性节能环保膜及其制备方法。
为了解决上述技术问题,本发明采取以下技术方案:
一种高耐候性节能环保膜,包括薄膜层和位于薄膜层上面的离型层;
薄膜层由以下重量份的组分组成:线型低密度聚乙烯80~100份、聚乳酸25~40份、乙烯-醋酸乙烯共聚物25~30份、乙烯-乙烯醇共聚物20~35份、聚乙烯醇18~25份、壳聚糖10~18份、碳酸钙10-20份,稳定剂2-3份、增塑剂10~13份,润滑剂3-8份,降解促进剂2-8份。
所述薄膜层由以下重量份的组分组成:
线型低密度聚乙烯90份、聚乳酸33份、乙烯-醋酸乙烯共聚物37份、乙烯-乙烯醇共聚物30份、聚乙烯醇22份、壳聚糖14份、碳酸钙15份,稳定剂3份、增塑剂12份,润滑剂5份,降解促进剂5份。
所述离型层由以下重量份的组分组成:
水性聚乙烯蜡乳液30-40份,水性聚氨酯乳液45-55份,水性改性聚乙烯醇溶液20-30份,天然乳胶5-9份,硅烷偶联剂3-5份,消泡剂0.2-0.6份,增稠剂0.3-0.6份。
所述增塑剂为聚乙二醇-400、环氧大豆油、柠檬酸酯中的一种或多种。
所述硅烷偶联剂为3-氨丙基三乙氧基硅烷。
所述增稠剂为甲基羟乙基纤维素。
一种高耐候性节能环保薄的制备方法,包括以下步骤:
配置薄膜溶液,将线型低密度聚乙烯、聚乳酸、乙烯-醋酸乙烯共聚物、乙烯-乙烯醇共聚物、聚乙烯醇、壳聚糖、碳酸钙,稳定剂、增塑剂,润滑剂,降解促进剂按照设定比例混合,置于分散机中搅拌分散,混合均匀,得到薄膜溶液;
配置离型层溶液,将水性聚乙烯蜡乳液,水性聚氨酯乳液,水性改性聚乙烯醇溶液,天然乳胶,硅烷偶联剂,消泡剂,增稠剂置于分解机中搅拌分解,混合均匀,得到离型层溶液;
将薄膜溶液送入挤出机中进行挤出,然后冷却形成片材,再将离型层溶液涂布在片材表面,烘干凝固,冷却后得到表面为离型层的薄膜。
本发明环保性好,能够降解,使用寿命长,具有优良的力学性能。
具体实施方式
为能进一步了解本发明的特征、技术手段以及所达到的具体目的、功能,下面结合具体实施方式对本发明作进一步详细描述。
实施例一
一种高耐候性节能环保薄的制备方法,包括具有薄膜和位于薄膜层上面的离型层,包括以下步骤:
配置薄膜溶液,将线型低密度聚乙烯80份、聚乳酸25份、乙烯-醋酸乙烯共聚物25份、乙烯-乙烯醇共聚物20份、聚乙烯醇18份、壳聚糖10份、碳酸钙10份,稳定剂2份、增塑剂10份,润滑剂3份,降解促进剂2份,置于分散机中搅拌分散,混合均匀,得到薄膜溶液。
配置离型层溶液,将水性聚乙烯蜡乳液30份,水性聚氨酯乳液45份,水性改性聚乙烯醇溶液20份,天然乳胶5份,硅烷偶联剂3份,消泡剂0.2份,增稠剂0.3份,置于分解机中搅拌分解,混合均匀,得到离型层溶液。
将薄膜溶液送入挤出机中进行挤出,然后冷却形成片材,再将离型层溶液涂布在片材表面,烘干凝固,冷却后得到表面为离型层的薄膜。
实施例二
一种高耐候性节能环保薄的制备方法,包括具有薄膜和位于薄膜层上面的离型层,包括以下步骤:
配置薄膜溶液,将线型低密度聚乙烯90份、聚乳酸33份、乙烯-醋酸乙烯共聚物37份、乙烯-乙烯醇共聚物30份、聚乙烯醇22份、壳聚糖14份、碳酸钙15份,稳定剂3份、增塑剂12份,润滑剂5份,降解促进剂5份,置于分散机中搅拌分散,混合均匀,得到薄膜溶液。
配置离型层溶液,将水性聚乙烯蜡乳液35份,水性聚氨酯乳液50份,水性改性聚乙烯醇溶液25份,天然乳胶7份,硅烷偶联剂4份,消泡剂0.4份,增稠剂0.4份,置于分解机中搅拌分解,混合均匀,得到离型层溶液。
将薄膜溶液送入挤出机中进行挤出,然后冷却形成片材,再将离型层溶液涂布在片材表面,烘干凝固,冷却后得到表面为离型层的薄膜。
实施例三
一种高耐候性节能环保薄的制备方法,包括具有薄膜和位于薄膜层上面的离型层,包括以下步骤:
配置薄膜溶液,将线型低密度聚乙烯100份、聚乳酸40份、乙烯-醋酸乙烯共聚物30份、乙烯-乙烯醇共聚物35份、聚乙烯醇25份、壳聚糖18份、碳酸钙20份,稳定剂3份、增塑剂13份,润滑剂8份,降解促进剂8份,置于分散机中搅拌分散,混合均匀,得到薄膜溶液。
配置离型层溶液,将水性聚乙烯蜡乳液40份,水性聚氨酯乳液55份,水性改性聚乙烯醇溶液30份,天然乳胶9份,硅烷偶联剂5份,消泡剂0.6份,增稠剂0.6份,置于分解机中搅拌分解,混合均匀,得到离型层溶液。
将薄膜溶液送入挤出机中进行挤出,然后冷却形成片材,再将离型层溶液涂布在片材表面,烘干凝固,冷却后得到表面为离型层的薄膜。
需要说明的是,以上仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换,但是凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (7)
1.一种高耐候性节能环保膜,其特征在于,包括薄膜层和位于薄膜层上面的离型层;
薄膜层由以下重量份的组分组成:线型低密度聚乙烯80~100份、聚乳酸25~40份、乙烯-醋酸乙烯共聚物25~30份、乙烯-乙烯醇共聚物20~35份、聚乙烯醇18~25份、壳聚糖10~18份、碳酸钙10-20份,稳定剂2-3份、增塑剂10~13份,润滑剂3-8份,降解促进剂2-8份。
2.根据权利要求1所述的高耐候性节能环保膜,其特征在于,所述薄膜层由以下重量份的组分组成:
线型低密度聚乙烯90份、聚乳酸33份、乙烯-醋酸乙烯共聚物37份、乙烯-乙烯醇共聚物30份、聚乙烯醇22份、壳聚糖14份、碳酸钙15份,稳定剂3份、增塑剂12份,润滑剂5份,降解促进剂5份。
3.根据权利要求2所述的高耐候性节能环保膜,其特征在于,所述离型层由以下重量份的组分组成:
水性聚乙烯蜡乳液30-40份,水性聚氨酯乳液45-55份,水性改性聚乙烯醇溶液20-30份,天然乳胶5-9份,硅烷偶联剂3-5份,消泡剂0.2-0.6份,增稠剂0.3-0.6份。
4.根据权利要求3所述的高耐候性节能环保膜,其特征在于,所述增塑剂为聚乙二醇-400、环氧大豆油、柠檬酸酯中的一种或多种。
5.根据权利要求4所述的高耐候性节能环保膜,其特征在于,所述硅烷偶联剂为3-氨丙基三乙氧基硅烷。
6.根据权利要求5所述的高耐候性节能环保膜,其特征在于,所述增稠剂为甲基羟乙基纤维素。
7.一种根据权利要求1-6中任一项所述的高耐候性节能环保薄的制备方法,其特征在于,包括以下步骤:
配置薄膜溶液,将线型低密度聚乙烯、聚乳酸、乙烯-醋酸乙烯共聚物、乙烯-乙烯醇共聚物、聚乙烯醇、壳聚糖、碳酸钙,稳定剂、增塑剂,润滑剂,降解促进剂按照设定比例混合,置于分散机中搅拌分散,混合均匀,得到薄膜溶液;
配置离型层溶液,将水性聚乙烯蜡乳液,水性聚氨酯乳液,水性改性聚乙烯醇溶液,天然乳胶,硅烷偶联剂,消泡剂,增稠剂置于分解机中搅拌分解,混合均匀,得到离型层溶液;
将薄膜溶液送入挤出机中进行挤出,然后冷却形成片材,再将离型层溶液涂布在片材表面,烘干凝固,冷却后得到表面为离型层的薄膜。
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