CN110878157A - 一种应用于bopp印刷膜的低溶剂残留母料 - Google Patents

一种应用于bopp印刷膜的低溶剂残留母料 Download PDF

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CN110878157A
CN110878157A CN201911227889.6A CN201911227889A CN110878157A CN 110878157 A CN110878157 A CN 110878157A CN 201911227889 A CN201911227889 A CN 201911227889A CN 110878157 A CN110878157 A CN 110878157A
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赵素芬
李新芳
谢文彬
张莉琼
柳孟良
潘斌
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Zhongshan Torch Polytechnic
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Abstract

本发明公开了一种应用于BOPP印刷膜的低溶剂残留母料，由如下重量份数的原料制成：PP树脂80‑94%，有机改性蒙脱土1‑5%，EVA蜡5%‑10%，爽滑剂0.15‑0.2%，开口剂0.1‑0.2%，抗静电剂0.2‑0.25%；本发明采用了挤出级PP树脂作为载体树脂，有机改性蒙脱土作为改性剂、EVA蜡作为增容剂，添加了爽滑剂、抗静电剂和开口剂等助剂，使BOPP印刷膜保持较高的表面张力，在印刷、复合过程中保持较低的溶剂残留量，试验研究表明，在BOPP薄膜内层添加本发明的低溶剂残留母料制成的BOPP印刷材料，其内层表面张力未经电晕处理时为38mN/m，经印刷、干式复合和熟化后，成品最终的溶剂残留低于5mg/m2，本发明作为低溶剂残留母料添加到BOPP印刷膜内层中制成印刷膜具有表面张力高、溶剂残留量低的特点。

Description

一种应用于BOPP印刷膜的低溶剂残留母料
技术领域
本发明涉及塑料薄膜材料技术领域，具体地，涉及一种应用于BOPP印刷膜的低溶剂残留母料。
背景技术
复合软包装是食品、药品、化妆品等与人们日常生活常用产品的必要组成部分，近几年层出不穷的食品安全事件，让食品企业和食品包装企业都处于舆论的风口浪尖，世界上大多数国家和地区对复合软包装溶剂残留规定是：总量≤5mg/m2，且苯类溶剂残留量不得检出；美国、日本和欧洲溶剂残留量的上限分别≤2mg/m2和3mg/m2，而我国《食品用塑料包装、容器、工具等制品生产许可审查细则》引用的复合膜、袋的标准年代较早，虽然2009年8月1日GB/T10004-2008《包装用塑料复合膜、袋干法复合、挤出复合》标准正式实施，代替了GB/T10004-1998和GB/T10005-1998，新标准与原标准相比提高了溶剂残留量的要求：溶剂总残留由10mg/m2调整为5mg/m2，苯类残留由3mg/m2调整为不得检出，但仍与美、日等发达国家有一定的差距。
但在软包装印刷膜中，用量高达50％的BOPP薄膜其复合软包装更容易发生溶剂残留超标的问题，BOPP薄膜和甲苯、乙酸乙酯等溶剂的溶度系数相近，表现出对乙酸乙酯和甲苯等有机溶剂的吸附速率加快。针对普通的食品包装的印刷膜BOPP一般采用氯化聚丙烯油墨，氯化聚丙烯树脂是烃类，其溶剂离不开苯类，而且甲苯的重量蒸发速率为2.4，不容易找到这范围内的替代普通溶剂，同时生产经验表明，增加酯、酮类溶剂，减少甲苯比例，却同时伴随印刷效果不好，高调还原欠佳，小网点丢失的质量问题。如何从材料本身出发，降低薄膜印刷后或者复合后对有机溶剂吸附性，目前国内外的相关研究甚少。因此通过BOPP材料的改性，研制出低溶剂残留的BOPP印刷膜，将会在食品包装安全方面做出巨大贡献。
发明内容
为了克服现有技术的不足，本发明提供一种应用于BOPP印刷膜的低溶剂残留母料。
本发明解决其技术问题所采用的技术方案是：
一种应用于BOPP印刷膜的低溶剂残留母料，由如下重量份数的原料制成：PP树脂80-94％，有机改性蒙脱土1-5％，EVA蜡5％-10％，爽滑剂0.15-0.2％，开口剂0.1-0.2％，抗静电剂0.2-0.25％；
其中，所述PP树脂为载体树脂；
所述有机改性蒙脱土为改性剂，有效物质含量为35-40％；
所述EVA蜡为增容剂，醋酸乙烯酯(VAC)含量在13-15％；
所述爽滑剂为高分子量硅酮、聚丙烯蜡、硬脂酸丁酯和季戊四醇硬脂酸酯的一种或两种及两种以上任意比例的混合物；
所述开口剂为分散性好的纳米二氧化硅和有机玻璃微珠任意比例的混合物；
所述抗静电剂为高纯度硬脂酸甘油酯。
所述PP树脂为挤出级树脂，其熔体流动速率约为3.2g/10min。
本发明的有益效果是：本发明采用了有机改性蒙脱土改性剂、EVA蜡增容剂，添加了爽滑剂、抗静电剂和开口剂等助剂，使BOPP印刷膜保持较高的表面张力，在印刷、复合过程中保持较低的溶剂残留量，试验研究表明，在BOPP薄膜内层添加本发明的低溶剂残留母料制成的BOPP印刷材料，其内层表面张力未经电晕处理时为38mN/m，经印刷、干式复合和熟化后，成品最终的溶剂残留低于5mg/m2，本发明作为低溶剂残留母料添加到BOPP印刷膜内层中制成印刷膜具有表面张力高、溶剂残留量低的特点。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明的实施例1-3的成分图；
图2是本发明的实施例1-3的性能测试结果图。
具体实施方式
实施例1：
一种应用于BOPP印刷膜的低溶剂残留母料，由如下重量份数的原料制成：PP树脂93.5％，有机改性蒙脱土1％，EVA蜡5％，爽滑剂0.15％，开口剂0.1％，抗静电剂0.25％；
其中，所述PP树脂为载体树脂，型号为HP550J的BOPP薄膜专用料；
所述有机改性蒙脱土为改性剂，型号为DK4，有效物质含量为35-40％；
所述EVA蜡为增容剂，型号为EVA3蜡，醋酸乙烯酯(VAC)含量在13-15％；
所述爽滑剂为硬脂酸丁酯和季戊四醇硬脂酸酯的混合物；
所述开口剂为分散性好的纳米二氧化硅；
所述抗静电剂为高纯度硬脂酸甘油酯。
所述PP树脂为挤出级树脂，其熔体流动速率约为3.2g/10min。
双螺杆挤出造粒机的螺杆温度分别为150，170，190，200，210，210，210，210，210，210，对本发明进行双向拉伸、凹版印刷和干式复合实验，实验表明，BOPP薄膜内层添加5％母料制成薄膜后，内层的表面张力为38mN/m，按正常的工艺进行凹版印刷(主要是醇类、酯类、苯类和酮类溶剂)和干式复合(主要是乙酸乙酯溶剂)，并在温度45-55℃下熟化48h，成品溶剂残留量为4.83mg/m2。
实施例2：
一种应用于BOPP印刷膜的低溶剂残留母料，由如下重量份数的原料制成：PP树脂84.35％，有机改性蒙脱土5％，EVA蜡10％，爽滑剂0.2％，开口剂0.2％，抗静电剂0.25％；
其中，所述PP树脂为载体树脂，型号为HP550J的BOPP薄膜专用料；
所述有机改性蒙脱土为改性剂，型号为DK4，有效物质含量为35-40％；
所述EVA蜡为增容剂，型号为EVA3蜡，醋酸乙烯酯(VAC)含量在13-15％；
所述爽滑剂为高分子量硅酮和聚丙烯蜡的混合物；
所述开口剂为分散性好的纳米二氧化硅和有机玻璃微珠的混合物；
所述抗静电剂为高纯度硬脂酸甘油酯。
所述PP树脂为挤出级树脂，其熔体流动速率约为3.2g/10min。
双螺杆挤出造粒机的螺杆温度分别为150，170，190，200，210，210，210，210，210，210，对本发明进行双向拉伸、凹版印刷和干式复合实验，实验表明，BOPP薄膜内层添加5％母料制成薄膜后，内层的表面张力为38mN/m，按正常的工艺进行凹版印刷(主要是醇类、酯类、苯类和酮类溶剂)和干式复合(主要是乙酸乙酯溶剂)，并在温度45-55℃下熟化48h，成品溶剂残留量为4.83mg/m2。
实施例3：
一种应用于BOPP印刷膜的低溶剂残留母料，由如下重量份数的原料制成：PP树脂88.4％，有机改性蒙脱土1％，EVA蜡10％，爽滑剂0.2％，开口剂0.2％，抗静电剂0.2％；
其中，所述PP树脂为载体树脂，型号为HP550J的BOPP薄膜专用料；
所述有机改性蒙脱土为改性剂，型号为DK4，有效物质含量为35-40％；
所述EVA蜡为增容剂，型号为EVA3蜡，醋酸乙烯酯(VAC)含量在13-15％；
所述爽滑剂为高分子量硅酮和聚丙烯蜡的混合物；
所述开口剂为分散性好的纳米二氧化硅和有机玻璃微珠的混合物；
所述抗静电剂为高纯度硬脂酸甘油酯。
所述PP树脂为挤出级树脂，其熔体流动速率约为3.2g/10min。
双螺杆挤出造粒机的螺杆温度分别为150，170，190，200，210，210，210，210，210，210，对本发明进行双向拉伸、凹版印刷和干式复合实验，实验表明，BOPP薄膜内层添加5％母料制成薄膜后，内层的表面张力为38mN/m，按正常的工艺进行凹版印刷(主要是醇类、酯类、苯类和酮类溶剂)和干式复合(主要是乙酸乙酯溶剂)，并在温度45-55℃下熟化48h，成品溶剂残留量为4.93mg/m2。
测试标准：
表面张力测试：GB T14216-2008塑料膜和片润湿张力的测定
成品溶剂残留量检测：GB/T10004-2008包装用塑料复合膜、袋干法复合、挤出复合参照图2，实施例1-3未经电晕处理时表面张力为38mN/m，经印刷、干式复合和熟化后，成品最终的溶剂残留均低于5mg/m2，确保BOPP印刷膜保持较高的表面张力，在印刷、复合过程中保持较低的溶剂残留量，并且不影响BOPP薄膜的透明度和光泽度。
以上的实施方式不能限定本发明创造的保护范围，专业技术领域的人员在不脱离本发明创造整体构思的情况下，所做的均等修饰与变化，均仍属于本发明创造涵盖的范围之内。

Claims (2)

1.一种应用于BOPP印刷膜的低溶剂残留母料，其特征在于它由如下重量份数的原料制成：PP树脂80-94%，有机改性蒙脱土1-5%，EVA蜡5%-10%，爽滑剂0.15-0.2%，开口剂0.1-0.2%，抗静电剂0.2-0.25%；
其中，所述PP树脂为载体树脂；
所述有机改性蒙脱土为改性剂，有效物质含量为35-40%；
所述EVA蜡为增容剂，醋酸乙烯酯（VAC）含量在13-15%；
所述爽滑剂为高分子量硅酮、聚丙烯蜡、硬脂酸丁酯和季戊四醇硬脂酸酯的一种或两种及两种以上任意比例的混合物；
所述开口剂为分散性好的纳米二氧化硅和有机玻璃微珠任意比例的混合物；
所述抗静电剂为高纯度硬脂酸甘油酯。
2.根据权利要求1所述的一种应用于BOPP印刷膜的低溶剂残留母料，其特征在于所述PP树脂为挤出级树脂，其熔体流动速率约为3.2g/10min。
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CN113603965A (zh) * 2021-08-06 2021-11-05 绍兴宏远新材料有限公司 一种环保长效高润湿张力透明bopp母料
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CN115230272A (zh) * 2022-07-11 2022-10-25 瑞安市东威塑胶有限公司 一种双面消光阻热型bopp隔膜及其制备方法

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