CN111114060A - 一种具有多层结构的pet复合膜及其制备方法 - Google Patents

一种具有多层结构的pet复合膜及其制备方法 Download PDF

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CN111114060A
CN111114060A CN202010052565.XA CN202010052565A CN111114060A CN 111114060 A CN111114060 A CN 111114060A CN 202010052565 A CN202010052565 A CN 202010052565A CN 111114060 A CN111114060 A CN 111114060A
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pet
parts
composite film
layer
pet composite
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周宇龙
史亚萍
周蔚如
孙红
王洁明
周宇平
陈亮
管仪新
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Yixing Yulong Plastic Package Product Co ltd
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Abstract

本发明公开了一种具有多层结构的PET复合膜及其制备方法，属于复合膜生产技术领域，一种具有多层结构的PET复合膜及其制备方法，包括PET基材层，PET基材层的上下两侧均覆盖有透光层，透光层的外侧粘接有耐磨层，PET基材层为石墨烯PET复合膜，透光层由透光涂料均匀涂于PET基材层上制得，本发明的PET复合膜，以石墨烯PET复合膜为基材层，并复合透光层和耐磨层制得，石墨烯PET复合膜本身具备高阻隔性，隔氧隔水性好，且防紫外效果佳，可用作防护材料和包装材料，复合透光层和耐磨层后，具备较佳的透光性，且有效的增加了PET的耐磨性能，增大了PET复合膜的使用范围。本发明的制备方法工艺简单、易操作，适合进行大批量生产。

Description

一种具有多层结构的PET复合膜及其制备方法
技术领域
本发明涉及复合膜生产技术领域，更具体地说，涉及一种具有多层结构的PET复合膜及其制备方法。
背景技术
PET聚酯薄膜简称PET薄膜。特点是好印刷，易加工，耐电压绝缘性好，防火能通过UL认证94VTM-2认证，环保有通过SGS,ROSH认证，是以聚对苯二甲酸乙二醇酯为原料，采用挤出法制成厚片，再经双向拉伸制成的薄膜材料。它是一种无色透明、有光泽的薄膜，机械性能优良，刚性、硬度及韧性高，耐穿刺，耐摩擦，耐高温和低温，耐化学药品性、耐油性、气密性和保香性良好，是常用的阻透性复合薄膜基材之一。
现有的PET膜通常为单层结构，而单层结构的PET薄膜不仅厚度低、且耐磨性能差，因此PET膜在使用过程中经常复合耐磨层使用，而在复合耐磨层后，透光率相应变差，不能满足高透光要求情况下的使用需求。
发明内容
1．要解决的技术问题
针对现有技术中存在的问题，本发明的目的在于提供一种具有多层结构的PET复合膜及其制备方法，本发明的PET复合膜，以石墨烯PET复合膜为基材层，并复合透光层和耐磨层制得，石墨烯PET复合膜本身具备高阻隔性，隔氧隔水性好，且防紫外效果佳，可用作防护材料和包装材料，复合透光层和耐磨层后，具备较佳的透光性，且有效的增加了PET的耐磨性能，增大了PET复合膜的使用范围。本发明的制备方法工艺简单、易操作，适合进行大批量生产。
2．技术方案
为解决上述问题，本发明采用如下的技术方案。
一种具有多层结构的PET复合膜，包括PET基材层，所述PET基材层的上下两侧均覆盖有透光层，所述透光层的外侧粘接有耐磨层，所述PET基材层为石墨烯PET复合膜，所述透光层由透光涂料均匀涂于PET基材层上制得，所述耐磨层通过胶粘剂粘结在透光层的外表面。
进一步的，所述石墨烯PET复合膜为石墨烯PET复合材料和助剂共同熔融流延成膜得到，其中石墨烯PET复合材料和助剂的质量比为1：0.05-0.11，所述石墨烯PET复合材料包括PET和纳米氧化石墨烯片。
进一步的，所述透光涂料包括以下按重量百分比计的组份：环己酮18-20份、乙酸丁酯15-19份、乙酸乙酯20-21份、聚甲基丙烯酸正丁酯5-6份、聚苯乙烯14-15份、丙烯酸树脂18-20份、脂肪族聚异氰酸酯2-3份、聚醚改性聚二甲基硅氧烷0.2份、流平剂0.2份、分散剂0.1份。
进一步的，所述透光涂料的制备方法为：将环己酮、乙酸丁酯、乙酸乙酯、聚甲基丙烯酸正丁酯、聚苯乙烯、丙烯酸树脂、脂肪族聚异氰酸酯、聚醚改性聚二甲基硅氧烷加入分散剂中，搅拌分散1.5-2.5h，再加入流平剂和分散剂，搅拌混合20-30min，得透光涂料。
进一步的，所述胶粘剂包括以下按重量份计的组份：聚丙烯酸单体乳液9-16份、环氧树脂2-3份、乳化剂0.1-0.3份、去离子水5份、固化剂12-18份、分散剂8-14份、羟乙基淀粉2-7份。
进一步的，所述胶粘剂的制备方法为：将环氧树脂、乳化剂和水置于反应釜中，加热至60-80℃，氮气保护下搅拌60-90min后，制得环氧树脂乳液；氮气保护下向环氧树脂乳液中加入聚丙烯酸单体乳液，继续反应4-6h后，加热升高10℃后，加入固化剂、分散剂和羟乙基淀粉混合均匀，保温30min后，冷却至室温，过滤，即得胶粘剂。
一种具有多层结构的PET复合膜的制备方法，包括以下步骤：
S1、制备PET基材层；
S2、在PET基材层的上下表面均匀涂抹透光涂料，经烘干、定型、老化、冷却后形成透光层；
S3、利用胶粘剂将耐磨层粘接在透光层外侧，即得PET复合膜。
进一步的，所述S1具体包括以下步骤：
S11、利用雾化干燥方式将氧化石墨烯分散液干燥，得到纳米氧化石墨烯片；
S12、将50重量份对苯二甲酸、22-28重量份乙二醇、0 .01重量份醋酸钠加入反应釜内充分混合搅拌，并在250℃下进行酯化反应，得酯化产物；
S13、将纳米氧化石墨烯片加入酯化产物中，保温搅拌1～3h，之后升温至285℃并抽真空，反应进行至体系不再放热，水冷切粒得到石墨烯/PET纳米复合材料。
进一步的，所述S13中，反应过程中需加入催化剂，催化剂的重量份为0.01。
进一步的，所述S2中，烘干过程为在80-110℃下烘1-2min，老化过程为在55-60℃下老化20-30h。
3．有益效果
相比于现有技术，本发明的优点在于：
（1）本发明的PET复合膜，以石墨烯PET复合膜为基材层，并复合透光层和耐磨层制得，石墨烯PET复合膜本身具备高阻隔性，隔氧隔水性好，且防紫外效果佳，可用作防护材料和包装材料，复合透光层和耐磨层后，具备较佳的透光性，且有效的增加了PET的耐磨性能，增大了PET复合膜的使用范围。
（2）本发明中的透光层采用透光涂料涂抹、烘干、定型、老化、冷却后形成，透光涂料采用环己酮、乙酸丁酯和乙酸乙酯组合物，光学辉度高，且雾度和透光率较高。
（3）本发明的保温层采用特殊成分的胶粘剂进行粘结，粘合效果好，胶层较薄的情况下既可以牢固的粘合，从而避免复合膜在切割时出现爆边等现象，并且胶粘剂透明度高，不会影响PET复合膜的通透性和光泽度。
（4）本发明的制备方法工艺简单、易操作，适合进行大批量生产。
附图说明
图1为本发明中PET复合膜的结构示意图；
图2为本发明中PET复合膜制备方法的流程图。
具体实施方式
下面将结合本发明实施例中的附图；对本发明实施例中的技术方案进行清楚、完整地描述；显然；所描述的实施例仅仅是本发明一部分实施例；而不是全部的实施例，基于本发明中的实施例；本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例；都属于本发明保护的范围。
实施例1：
请参阅图1，一种具有多层结构的PET复合膜，包括PET基材层，PET基材层的上下两侧均覆盖有透光层，透光层的外侧粘接有耐磨层，PET基材层为石墨烯PET复合膜，透光层由透光涂料均匀涂于PET基材层上制得，所述耐磨层通过胶粘剂粘结在透光层的外表面。
石墨烯PET复合膜为石墨烯PET复合材料和助剂共同熔融流延成膜得到，其中石墨烯PET复合材料和助剂的质量比为1：0.05-0.11，石墨烯PET复合材料包括PET和纳米氧化石墨烯片。
透光涂料包括以下按重量百分比计的组份：环己酮18-20份、乙酸丁酯15-19份、乙酸乙酯20-21份、聚甲基丙烯酸正丁酯5-6份、聚苯乙烯14-15份、丙烯酸树脂18-20份、脂肪族聚异氰酸酯2-3份、聚醚改性聚二甲基硅氧烷0.2份、流平剂0.2份、分散剂0.1份；
透光涂料的制备方法为：将环己酮、乙酸丁酯、乙酸乙酯、聚甲基丙烯酸正丁酯、聚苯乙烯、丙烯酸树脂、脂肪族聚异氰酸酯、聚醚改性聚二甲基硅氧烷加入分散剂中，搅拌分散1.5-2.5h，再加入流平剂和分散剂，搅拌混合20-30min，得透光涂料。
胶粘剂包括以下按重量份计的组份：聚丙烯酸单体乳液9-16份、环氧树脂2-3份、乳化剂0.1-0.3份、去离子水5份、固化剂12-18份、分散剂8-14份、羟乙基淀粉2-7份。
胶粘剂的制备方法为：将环氧树脂、乳化剂和水置于反应釜中，加热至60-80℃，氮气保护下搅拌60-90min后，制得环氧树脂乳液；氮气保护下向环氧树脂乳液中加入聚丙烯酸单体乳液，继续反应4-6h后，加热升高10℃后，加入固化剂、分散剂和羟乙基淀粉混合均匀，保温30min后，冷却至室温，过滤，即得胶粘剂。
本发明的PET复合膜，以石墨烯PET复合膜为基材层，并复合透光层和耐磨层制得，石墨烯PET复合膜本身具备高阻隔性，隔氧隔水性好，且防紫外效果佳，可用作防护材料和包装材料，复合透光层和耐磨层后，具备较佳的透光性，且不易在低温环境下脆化，增大了PET复合膜的使用范围。
本发明中的透光层采用透光涂料涂抹、烘干、定型、老化、冷却后形成，透光涂料采用环己酮、乙酸丁酯和乙酸乙酯组合物，光学辉度高，且雾度和透光率较高。
本发明的保温层采用特殊成分的胶粘剂进行粘结，粘合效果好，胶层较薄的情况下既可以牢固的粘合，从而避免复合膜在切割时出现爆边等现象，并且胶粘剂透明度高，不会影响PET复合膜的通透性和光泽度。
请参阅图2，一种具有多层结构的PET复合膜的制备方法，包括以下步骤：
S1、制备PET基材层；
S2、在PET基材层的上下表面均匀涂抹透光涂料，经烘干、定型、老化、冷却后形成透光层；
S3、利用胶粘剂将耐磨层粘接在透光层外侧，即得PET复合膜。
S1具体包括以下步骤：
S11、利用雾化干燥方式将氧化石墨烯分散液干燥，得到纳米氧化石墨烯片；
S12、将50重量份对苯二甲酸、22-28重量份乙二醇、0 .01重量份醋酸钠加入反应釜内充分混合搅拌，并在250℃下进行酯化反应，得酯化产物；
S13、将纳米氧化石墨烯片加入酯化产物中，保温搅拌1～3h，之后升温至285℃并抽真空，反应进行至体系不再放热，水冷切粒得到石墨烯/PET纳米复合材料。
S13中，反应过程中需加入催化剂，催化剂的重量份为0.01。
S2中，烘干过程为在80-110℃下烘1-2min，老化过程为在55-60℃下老化20-30h。
本发明的制备方法工艺简单、易操作，适合进行大批量生产。
以上所述；仅为本发明较佳的具体实施方式；但本发明的保护范围并不局限于此；任何熟悉本技术领域的技术人员在本发明揭露的技术范围内；根据本发明的技术方案及其改进构思加以等同替换或改变；都应涵盖在本发明的保护范围内。

Claims (10)

1.一种具有多层结构的PET复合膜，包括PET基材层，其特征在于：所述PET基材层的上下两侧均覆盖有透光层，所述透光层的外侧粘接有耐磨层，所述PET基材层为石墨烯PET复合膜，所述透光层由透光涂料均匀涂于PET基材层上制得，所述耐磨层通过胶粘剂粘结在透光层的外表面。
2.根据权利要求1所述的一种具有多层结构的PET复合膜，其特征在于：所述石墨烯PET复合膜为石墨烯PET复合材料和助剂共同熔融流延成膜得到，其中石墨烯PET复合材料和助剂的质量比为1：0.05-0.11，所述石墨烯PET复合材料包括PET和纳米氧化石墨烯片。
3.根据权利要求1所述的一种具有多层结构的PET复合膜，其特征在于：所述透光涂料包括以下按重量百分比计的组份：环己酮18-20份、乙酸丁酯15-19份、乙酸乙酯20-21份、聚甲基丙烯酸正丁酯5-6份、聚苯乙烯14-15份、丙烯酸树脂18-20份、脂肪族聚异氰酸酯2-3份、聚醚改性聚二甲基硅氧烷0.2份、流平剂0.2份、分散剂0.1。
4.根据权利要求3所述的一种具有多层结构的PET复合膜，其特征在于：所述透光涂料的制备方法为：将环己酮、乙酸丁酯、乙酸乙酯、聚甲基丙烯酸正丁酯、聚苯乙烯、丙烯酸树脂、脂肪族聚异氰酸酯、聚醚改性聚二甲基硅氧烷加入分散剂中，搅拌分散1.5-2.5h，再加入流平剂和分散剂，搅拌混合20-30min，得透光涂料。
5.根据权利要求1所述的一种具有多层结构的PET复合膜，其特征在于：所述胶粘剂包括以下按重量份计的组份：聚丙烯酸单体乳液9-16份、环氧树脂2-3份、乳化剂0.1-0.3份、去离子水5份、固化剂12-18份、分散剂8-14份、羟乙基淀粉2-7份。
6.根据权利要求5所述的一种具有多层结构的PET复合膜，其特征在于：所述胶粘剂的制备方法为：将环氧树脂、乳化剂和水置于反应釜中，加热至60-80℃，氮气保护下搅拌60-90min后，制得环氧树脂乳液；氮气保护下向环氧树脂乳液中加入聚丙烯酸单体乳液，继续反应4-6h后，加热升高10℃后，加入固化剂、分散剂和羟乙基淀粉混合均匀，保温30min后，冷却至室温，过滤，即得胶粘剂。
7.一种如权利要求1-6任意一项所述的具有多层结构的PET复合膜的制备方法，其特征在于：包括以下步骤：
S1、制备PET基材层；
S2、在PET基材层的上下表面均匀涂抹透光涂料，经烘干、定型、老化、冷却后形成透光层；
S3、利用胶粘剂将耐磨层粘接在透光层外侧，即得PET复合膜。
8.根据权利要求7所述的一种具有多层结构的PET复合膜的制备方法，其特征在于：所述S1具体包括以下步骤：
S11、利用雾化干燥方式将氧化石墨烯分散液干燥，得到纳米氧化石墨烯片；
S12、将50重量份对苯二甲酸、22-28重量份乙二醇、0 .01重量份醋酸钠加入反应釜内充分混合搅拌，并在250℃下进行酯化反应，得酯化产物；
S13、将纳米氧化石墨烯片加入酯化产物中，保温搅拌1～3h，之后升温至285℃并抽真空，反应进行至体系不再放热，水冷切粒得到石墨烯/PET纳米复合材料。
9.根据权利要求8所述的一种具有多层结构的PET复合膜的制备方法，其特征在于：所述S13中，反应过程中需加入催化剂，催化剂的重量份为0.01。
10.根据权利要求7所述的一种具有多层结构的PET复合膜的制备方法，其特征在于：所述S2中，烘干过程为在80-110℃下烘1-2min，老化过程为在55-60℃下老化20-30h。
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