CN108587511A - 用于表面保护的可回收压敏胶带 - Google Patents

用于表面保护的可回收压敏胶带 Download PDF

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CN108587511A
CN108587511A CN201810342313.3A CN201810342313A CN108587511A CN 108587511 A CN108587511 A CN 108587511A CN 201810342313 A CN201810342313 A CN 201810342313A CN 108587511 A CN108587511 A CN 108587511A
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金闯
梁豪
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Jiangsu Stick New Materials Polytron Technologies Inc
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Abstract

本发明公开一种用于表面保护的可回收压敏胶带，包括PET薄膜、聚丙烯薄膜、压敏改性EVA胶黏剂层和离型材料层，所述压敏改性EVA胶黏剂层位于聚丙烯薄膜和离型材料层之间；改性EVA水溶液进一步通过以下步骤获得：将聚乙烯醇、异辛酸钠、亚硫酸钾盐和硫酸亚铁溶解在离子水中形成水性混合物；将水性混合物放入高压釜中，再通入乙烯置换出高压釜内的空气；将反应釜夹套水将物料升温至反应温度80℃并搅拌，依次注入单体醋酸乙烯酯、丙烯酸、过氧化二异丙苯、叔丁基过氧化氢、焦亚硫酸钠。本发明用于表面保护的可回收压敏胶带实现了EVA胶黏剂层在常温具有粘性和压敏性，且提高了改性EVA胶黏剂层与聚丙烯薄膜的附着力。

Description

用于表面保护的可回收压敏胶带
技术领域
本发明涉及一种保护膜，特别涉及一种用于表面保护的可回收压敏胶带。
背景技术
常见的保护膜产品约70~90%质量份额为膜类基材，这些膜类物质在自然界中很难降解，然而，在环保意识不断加强的今天，环境友好型材料及材料的可回收性越来越受到人们的重视，资源、市场及环保要求越来越高。但目前市场上占主导地位的保护膜类产品，其在使用完毕后，一般都是作为固态危废，或是作为工业垃圾进行填埋、焚烧甚至不作有效处理混杂于普通的社会垃圾中，这不仅严重污染了我们的生活环境，而且也造成了资源的极大浪费。如若能进行回收处理，不仅具有极其重要的社会环境效益，也将具有极佳的经济效益。
发明内容
本发明提供一种用于表面保护的可回收压敏胶带，此用于表面保护的可回收压敏胶带实现了EVA胶黏剂层在常温具有粘性和压敏性，且压敏改性EVA胶黏剂层为水性体系环保，无刺激性气味，也方便用于表面保护的可回收压敏胶带重复利用和回收，大大减少了污染。
为达到上述目的，本发明采用的技术方案是：一种用于表面保护的可回收压敏胶带，包括PET薄膜、聚丙烯薄膜、压敏改性EVA胶黏剂层和离型材料层，所述压敏改性EVA胶黏剂层位于聚丙烯薄膜和离型材料层之间；
所述压敏改性EVA胶黏剂层由以下组分组成：改性EVA水溶液100份、丙烯酸异辛酯18份、去离子水28份、叔丁基过氧化2-乙基己基碳酸酯7份、亚甲基双苯二胺6份、聚甲基苯基硅氧烷5份、过氧化-2-乙基己基碳酸叔丁酯2份、三烯丙基异氰脲酸酯1.6份、萜烯树脂1.5份、烷基酚聚氧乙烯醚1.5份、二甲基亚砜0.6份；
所述改性EVA水溶液进一步通过以下步骤获得：
步骤一、将35份聚乙烯醇、8份异辛酸钠、3份亚硫酸钾盐和0.09份硫酸亚铁溶解在离子水中形成水性混合物；
步骤二、将步骤一的水性混合物放入高压釜中，再通入乙烯置换出高压釜内的空气；
步骤三、将反应釜夹套水将物料升温至反应温度80℃并搅拌，依次注入单体100份醋酸乙烯酯、12份丙烯酸、0.09份过氧化二异丙苯、0.5份叔丁基过氧化氢、0.9份焦亚硫酸钠；
步骤四、降温至40℃以下形成所述改性EVA水溶液。
由于上述技术方案运用，本发明与现有技术相比具有下列优点和效果：
1. 本发明用于表面保护的可回收压敏胶带，其采用丙烯酸并结合硫酸亚铁、聚乙烯醇，改性了由乙烯、醋酸乙烯酯形成的乙烯-醋酸乙烯共聚物，配合丙烯酸异辛酯、亚甲基双苯二胺和叔丁基过氧化2-乙基己基碳酸酯实现了EVA胶黏剂层在常温具有粘性和压敏性，且压敏改性EVA胶黏剂层为水性体系环保，无刺激性气味，也方便用于表面保护的可回收压敏胶带重复利用和回收，大大减少了污染；其次，进一步加入过氧化-2-乙基己基碳酸叔丁酯、三烯丙基异氰脲酸酯进一步提高了改性EVA胶黏剂层与聚丙烯薄膜的附着力。
2. 本发明用于表面保护的可回收压敏胶带，其体系中加入烷基酚聚氧乙烯醚、二甲基亚砜能使固体物料更易被水浸湿的物质。通过降低其表面张力或界面张力，使水能展开在固体物料表面上，或透入其表面，而把固体物料润湿；其次，其添加聚甲基苯基硅氧烷改善体系的相容性和表面张力，有利于更好低在涂布过程中实现涂液涂布。
具体实施方式
下面结合实施例对本发明作进一步描述：
实施例：一种用于表面保护的可回收压敏胶带，包括PET薄膜、聚丙烯薄膜、压敏改性EVA胶黏剂层和离型材料层，所述压敏改性EVA胶黏剂层位于聚丙烯薄膜和离型材料层之间；
所述压敏改性EVA胶黏剂层由以下组分组成：改性EVA水溶液100份、丙烯酸异辛酯18份、去离子水28份、叔丁基过氧化2-乙基己基碳酸酯7份、亚甲基双苯二胺6份、聚甲基苯基硅氧烷5份、过氧化-2-乙基己基碳酸叔丁酯2份、三烯丙基异氰脲酸酯1.6份、萜烯树脂1.5份、烷基酚聚氧乙烯醚1.5份、二甲基亚砜0.6份；
所述改性EVA水溶液进一步通过以下步骤获得：
步骤一、将35份聚乙烯醇、8份异辛酸钠、3份亚硫酸钾盐和0.09份硫酸亚铁溶解在离子水中形成水性混合物；
步骤二、将步骤一的水性混合物放入高压釜中，再通入乙烯置换出高压釜内的空气；
步骤三、将反应釜夹套水将物料升温至反应温度80℃并搅拌，依次注入单体100份醋酸乙烯酯、12份丙烯酸、0.09份过氧化二异丙苯、0.5份叔丁基过氧化氢、0.9份焦亚硫酸钠；
步骤四、降温至40℃以下形成所述改性EVA水溶液。
上述步骤二中高压釜的压力为5~10MPa。
实施例的PET薄膜4与聚丙烯薄膜1的厚度比为1：4。
表1
采用上述用于表面保护的可回收压敏胶带时，其采用丙烯酸并结合硫酸亚铁、聚乙烯醇，改性了由乙烯、醋酸乙烯酯形成的乙烯-醋酸乙烯共聚物，配合丙烯酸异辛酯、亚甲基双苯二胺和叔丁基过氧化2-乙基己基碳酸酯实现了EVA胶黏剂层在常温具有粘性和压敏性，且压敏改性EVA胶黏剂层为水性体系环保，无刺激性气味，也方便用于表面保护的可回收压敏胶带重复利用和回收，大大减少了污染；其次，进一步加入过氧化-2-乙基己基碳酸叔丁酯、三烯丙基异氰脲酸酯进一步提高了改性EVA胶黏剂层与聚丙烯薄膜的附着力；再次，其体系中加入烷基酚聚氧乙烯醚、二甲基亚砜能使固体物料更易被水浸湿的物质。通过降低其表面张力或界面张力，使水能展开在固体物料表面上，或透入其表面，而把固体物料润湿；其次，其添加聚甲基苯基硅氧烷改善体系的相容性和表面张力，有利于更好低在涂布过程中实现涂液涂布。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (1)

1.一种用于表面保护的可回收压敏胶带，其特征在于：包括PET薄膜、聚丙烯薄膜、压敏改性EVA胶黏剂层和离型材料层，所述压敏改性EVA胶黏剂层位于聚丙烯薄膜和离型材料层之间；
所述压敏改性EVA胶黏剂层由以下组分组成：改性EVA水溶液100份、丙烯酸异辛酯18份、去离子水28份、叔丁基过氧化2-乙基己基碳酸酯7份、亚甲基双苯二胺6份、聚甲基苯基硅氧烷5份、过氧化-2-乙基己基碳酸叔丁酯2份、三烯丙基异氰脲酸酯1.6份、萜烯树脂1.5份、烷基酚聚氧乙烯醚1.5份、二甲基亚砜0.6份；
所述改性EVA水溶液进一步通过以下步骤获得：
步骤一、将35份聚乙烯醇、8份异辛酸钠、3份亚硫酸钾盐和0.09份硫酸亚铁溶解在离子水中形成水性混合物；
步骤二、将步骤一的水性混合物放入高压釜中，再通入乙烯置换出高压釜内的空气；
步骤三、将反应釜夹套水将物料升温至反应温度80℃并搅拌，依次注入单体100份醋酸乙烯酯、12份丙烯酸、0.09份过氧化二异丙苯、0.5份叔丁基过氧化氢、0.9份焦亚硫酸钠；
步骤四、降温至40℃以下形成所述改性EVA水溶液。
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