CN106189898A - 可回收保护膜 - Google Patents

可回收保护膜 Download PDF

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CN106189898A
CN106189898A CN201610545418.XA CN201610545418A CN106189898A CN 106189898 A CN106189898 A CN 106189898A CN 201610545418 A CN201610545418 A CN 201610545418A CN 106189898 A CN106189898 A CN 106189898A
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parts
recyclable
modified eva
film
protecting film
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金闯
陈静
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Suzhou Sidike New Material Science and Technology Co Ltd
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Suzhou Sidike New Material Science and Technology Co Ltd
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Priority to CN201810342313.3A priority Critical patent/CN108587511A/zh
Priority to CN201810346280.XA priority patent/CN108707433A/zh
Priority to CN201710052831.7A priority patent/CN107629716A/zh
Priority to CN201810373146.9A priority patent/CN108559421A/zh
Priority to CN201610545418.XA priority patent/CN106189898A/zh
Priority to CN201710052682.4A priority patent/CN107629718A/zh
Priority to CN201810366185.6A priority patent/CN108559419A/zh
Priority to CN201810342345.3A priority patent/CN108611014A/zh
Priority to CN201810346282.9A priority patent/CN108753190A/zh
Priority to CN201810367336.XA priority patent/CN108559420A/zh
Priority to CN201710052683.9A priority patent/CN107629715A/zh
Publication of CN106189898A publication Critical patent/CN106189898A/zh
Pending legal-status Critical Current

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Abstract

本发明公开一种可回收保护膜，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、去离子水、叔丁基过氧化2‑乙基己基碳酸酯、亚甲基双苯二胺、聚甲基苯基硅氧烷、过氧化‑2‑乙基己基碳酸叔丁酯、三烯丙基异氰脲酸酯1~2份、萜烯树脂1~2份、烷基酚聚氧乙烯醚0.5~2份；二甲基亚砜0.5~1份。本发明可回收保护膜实现了EVA胶黏剂层在常温具有粘性和压敏性，且无刺激性气味，也方便可回收保护膜重复利用和回收，大大减少了污染。

Description

可回收保护膜
技术领域
本发明涉及一种保护膜，特别涉及一种可回收保护膜。
背景技术
玻璃、金属板材、塑料板材等材料在搬运和使用过程中，其表面容易受到接触性污染或磨痕划伤，所以通常采用保护膜覆盖在其表面使之免受损伤和污染。现有技术中所用到的保护膜基本都为平面保护膜，通常情况下它包括基材层、乳着层和离型层。所述的基材层通常为聚碳酸酯、聚乙烯、PET、定向拉伸聚丙烯或是芳族聚醋等材质所组成，基材层为保护膜的主要结构层；黏着层贴浮于基材层的一侧，通常由含有烷氧基硅烷的聚合物或丙烯酸聚合物等所构成，用以将基材层张贴于欲保护的物体表面；而离型层用于保护未使用状态下的保护膜，使用时将离型层去掉将其粘附在物体表面。这样这种普通的平面保护膜由三层构成，成本比较高，且随着湿度、温度和周围环境的其他情况的变化，黏着层容易受潮或受到化学反应产生基材层脱落的现象；当需要更换或者是处理原来的保护膜时候，由于黏着层长时间贴于被贴物会出现残胶现象，不易处理；并且生产和使用保护膜过程中，黏着层的化学材质和离型层会产生大量污染，同时该保护膜也不可以循环使用，不利于节能环保。
发明内容
本发明提供一种可回收保护膜，此可回收保护膜实现了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，也方便可回收保护膜重复利用和回收，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：一种可回收保护膜，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 10~20份，
去离子水 20~30份，
叔丁基过氧化2-乙基己基碳酸酯 5~8份，
亚甲基双苯二胺 4~6份，
聚甲基苯基硅氧烷 3~5份，
过氧化-2-乙基己基碳酸叔丁酯 2~4份，
三烯丙基异氰脲酸酯 1~2份，
萜烯树脂 1~2份，
烷基酚聚氧乙烯醚 0.5~2份，
二甲基亚砜 0.5~1份；
所述改性EVA水溶液进一步通过以下步骤获得：
步骤一、将20~40份聚乙烯醇、6~8份异辛酸钠、2~4份亚硫酸钾盐和0.05~0.1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、10~20份丙烯酸、0.05~1份过氧化二异丙苯、0.25~0.5份叔丁基过氧化氢、0.5~1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。
上述技术方案中进一步改进的技术方案如下：
1. 上述方案中，所述步骤二中高压釜的压力为5~10MPa。
2. 上述方案中，所述叔丁基过氧化氢、与焦亚硫酸钠的重量份比例为1：2。
3. 上述方案中，所述PET薄膜与聚丙烯薄膜的厚度比为1：2~4。
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. 本发明可回收保护膜，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，也方便可回收保护膜重复利用和回收，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. 本发明可回收保护膜，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。
附图说明
附图1为本发明可回收保护膜结构示意图。
以上附图中：1、聚丙烯薄膜；2、压敏改性EVA胶黏剂层；3、离型材料层；4、PET薄膜。
具体实施方式
下面结合附图及实施例对本发明作进一步描述：
实施例1~4： 一种可回收保护膜，包括PET薄膜4、聚丙烯薄膜1、压敏改性EVA胶黏剂层2和离型材料层3，所述压敏改性EVA胶黏剂层2位于聚丙烯薄膜1和离型材料层3之间；
所述压敏改性EVA胶黏剂层2由以下组分组成：
表1
所述改性EVA水溶液进一步通过以下步骤获得：
步骤一、将20~40份聚乙烯醇、6~8份异辛酸钠、2~4份亚硫酸钾盐和0.05~0.1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100份醋酸乙烯酯单体、10~20份丙烯酸、0.05~1份过氧化二异丙苯、0.25~0.5份叔丁基过氧化氢、0.5~1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。
表2
上述步骤二中高压釜的压力为5~10MPa。
实施例1的PET薄膜4与聚丙烯薄膜1的厚度比为1：3，实施例2的PET薄膜4与聚丙烯薄膜1的厚度比为1：4，实施例3的PET薄膜4与聚丙烯薄膜1的厚度比为1：2.5，实施例4的PET薄膜4与聚丙烯薄膜1的厚度比为1：3.2。
表3
采用上述可回收保护膜时，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，也方便可回收保护膜重复利用和回收，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 (4)

1.一种可回收保护膜，其特征在于：包括PET薄膜（4）、聚丙烯薄膜（1）、压敏改性EVA胶黏剂层（2）和离型材料层（3），所述压敏改性EVA胶黏剂层（2）位于聚丙烯薄膜（1）和离型材料层（3）之间；
所述压敏改性EVA胶黏剂层（2）由以下组分组成：
改性EVA水溶液 100份，
丙烯酸异辛酯 10~20份，
去离子水 20~30份，
叔丁基过氧化2-乙基己基碳酸酯 5~8份，
亚甲基双苯二胺 4~6份，
聚甲基苯基硅氧烷 3~5份，
过氧化-2-乙基己基碳酸叔丁酯 2~4份，
三烯丙基异氰脲酸酯 1~2份，
萜烯树脂 1~2份，
烷基酚聚氧乙烯醚 0.5~2份，
二甲基亚砜 0.5~1份；
所述改性EVA水溶液进一步通过以下步骤获得：
步骤一、将20~40份聚乙烯醇、6~8份异辛酸钠、2~4份亚硫酸钾盐和0.05~0.1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、10~20份丙烯酸、0.05~1份过氧化二异丙苯、0.25~0.5份叔丁基过氧化氢、0.5~1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。
2.根据权利要求1所述的可回收保护膜，其特征在于：所述步骤二中高压釜的压力为5~10MPa。
3.根据权利要求1所述的可回收保护膜，其特征在于：所述叔丁基过氧化氢、与焦亚硫酸钠的重量份比例为1：2。
4.根据权利要求1所述的可回收保护膜，其特征在于：所述PET薄膜（4）与聚丙烯薄膜（1）的厚度比为1：2~4。
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