CN111363417A - 一种可降解涂层及其制备方法与应用 - Google Patents

一种可降解涂层及其制备方法与应用 Download PDF

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CN111363417A
CN111363417A CN202010345779.6A CN202010345779A CN111363417A CN 111363417 A CN111363417 A CN 111363417A CN 202010345779 A CN202010345779 A CN 202010345779A CN 111363417 A CN111363417 A CN 111363417A
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CN111363417B (zh
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郑辉
李小连
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Xuchuan New Material Guangdong Co ltd
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Abstract

本发明公开了一种可降解涂层及其制备方法与应用，包括以下重量百分比的原料：EVA：30‑40%、增粘树脂：35‑45%、粘度调节剂：15‑20%、填料：5‑15%和助剂：0.3‑1%；该可降解涂层具有耐高温更高，可降解等优点。

Description

一种可降解涂层及其制备方法与应用
技术领域
本发明涉及一种可降解涂层及其制备方法与应用。
背景技术
目前饮料用吸管通常为塑料吸管，塑料吸管虽然使用方便，但使用后丢弃的塑料吸管在自然环境中难以降解，不利于环保。
随着社会的发展，大家环保意识的加强，业界已经提出更多有利于环保的吸管技术。目前的纸吸管一般采用纸质为主体，辅助水性胶粘剂，这类吸管由于耐高温性能较差，长时间浸泡在饮料而开胶，给使用者造成不便。
发明内容
针对现有技术中的不足，本发明的目的是提供一种具有耐高温更高，可降解等优点的可降解涂层及其制备方法与应用。
本发明解决其技术问题所采用的技术方案是：
一种可降解涂层，包括以下重量百分比的原料：EVA：30-40％、增粘树脂：35-45％、粘度调节剂：15-20％、填料：5-15％和助剂：0.3-1％。
作为优选，所述的EVA由低熔指EVA与高熔指EVA组成，EVA的熔融指数分别为150g/10min与400g/10min，所述的高熔融指数EVA与低熔融指数EVA的配比为1：3。
进一步的，所述的EVA中的VA含量为28％。
作为优选，所述的增粘树脂为松香酯与碳9石油树脂的混合物，且松香酯与碳9石油树脂的配比为3：1。
作为优选，所述的粘度调节剂为合成蜡，软化点为100-120℃。
作为优选，所述的填料为细碳酸钙。
作为优选，所述的助剂为抗氧剂。
进一步的，所述的抗氧剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯或β-(3,5-二叔丁基-4-羟基苯基)丙酸正十八碳醇酯中一种或两种混合。
本发明所要解决的另一技术问题为提供一种可降解涂层的制备方法，包括以下步骤：
1)取EVA、增粘树脂、粘度调节剂、填料、助剂，依次缓慢加入搅拌釜中，边搅拌边加热升温至150-160℃，搅拌速度为35-40r/min，搅拌时间为1-2小时。
2)将上述的搅拌均匀物投入挤出机中挤出，所述双螺杆挤出机入口段、中间段与出口段的温度分别控制在100-120℃、100-120℃、100-120℃；
3)上述挤出物通过造粒机冷却加工形成热熔胶颗粒；
4)将热熔胶胶粒加入热熔胶机中，升温至150℃，刮涂在纸上，涂胶量为15-20克/平方米，而制作成有热熔涂层的预涂纸；
5)把预涂纸经过热封、冷却、成型。
一种采用上述可降解涂层在纸吸管中的应用。
本发明的有益效果是：
先制作好热熔胶，并把热熔涂层预涂在吸管纸上，做成半成品，然后再把预涂好涂层的吸管纸经过热封、成型，卷成吸管；这种纸吸管具有着可耐100℃沸水，可降解的优点。
具体实施方式
下面结合具体实施例对本发明作进一步说明，以使本领域技术人员可以更好的理解本发明并能予以实施，但所举实施例不作为对本发明的限定。
实施例1
一种可降解涂层，包括以下重量百分比的原料：EVA 30％、增粘树脂45％、粘度调节剂15％、填料9.7％和助剂0.3％。
所述的EVA由低熔指EVA与高熔指EVA组成，EVA的熔融指数分别为150g/10min与400g/10min，所述的高熔融指数EVA与低熔融指数EVA的配比为1：3，所述的EVA中的VA含量为28％，所述的增粘树脂为松香酯与碳9石油树脂的混合物，且松香酯与碳9石油树脂的配比为3：1，所述的粘度调节剂为合成蜡，软化点为100-120℃，所述的填料为细碳酸钙，所述的助剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯。
一种可降解涂层的制备方法，包括以下步骤：
1)取EVA 30％、增粘树脂45％、粘度调节剂15％、填料9.7％和助剂0.3％，依次缓慢加入搅拌釜中，边搅拌边加热升温至150℃，搅拌速度为35r/min，搅拌时间为1小时。
2)将上述的搅拌均匀物投入挤出机中挤出，所述双螺杆挤出机入口段、中间段与出口段的温度分别控制在110℃、105℃、100℃；
3)上述挤出物通过造粒机冷却加工形成热熔胶颗粒；
4)将热熔胶胶粒加入热熔胶机中，升温至150℃，刮涂在纸上，
涂胶量为15克/平方米，而制作成有热熔涂层的预涂纸；
5)把预涂纸经过热封、冷却、成型为纸吸管状。
实施例2
一种可降解涂层，包括以下重量百分比的原料：EVA 40％、增粘树脂35％、粘度调节剂15％、填料9％和助剂1％。
所述的EVA由低熔指EVA与高熔指EVA组成，EVA的熔融指数分别为150g/10min与400g/10min，所述的高熔融指数EVA与低熔融指数EVA的配比为1：3，所述的EVA中的VA含量为28％，所述的增粘树脂为松香酯与碳9石油树脂的混合物，且松香酯与碳9石油树脂的配比为3：1，所述的粘度调节剂为合成蜡，软化点为120℃，所述的填料为细碳酸钙，所述的助剂为β-(3,5-二叔丁基-4-羟基苯基)丙酸正十八碳醇酯。
一种可降解涂层的制备方法，包括以下步骤：
1)取EVA：40％、增粘树脂：35％、粘度调节剂：15％、填料：9％和助剂：1％，依次缓慢加入搅拌釜中，边搅拌边加热升温至150-160℃，搅拌速度为35r/min，搅拌时间为1小时，至搅拌均匀。
2)将上述的搅拌均匀物投入挤出机中挤出，所述双螺杆挤出机入口段、中间段与出口段的温度分别控制在120℃、110℃、110℃；
3)上述挤出物通过造粒机冷却加工形成热熔胶颗粒；
4)将热熔胶胶粒加入热熔胶机中，升温至150℃，刮涂在纸上，涂胶量为20克/平方米，而制作成有热熔涂层的预涂纸；
5)把预涂纸经过热封、冷却、成型为纸吸管状。
实施例3
一种可降解涂层，包括以下重量百分比的原料：EVA 35％、增粘树脂40％、粘度调节剂17％、填料7.5％和助剂0.5％。
所述的EVA由低熔指EVA与高熔指EVA组成，EVA的熔融指数分别为150g/10min与400g/10min，所述的高熔融指数EVA与低熔融指数EVA的配比为1：3，进一步的，所述的EVA中的VA含量为28％，所述的增粘树脂为松香酯与碳9石油树脂的混合物，且松香酯与碳9石油树脂的配比为3：1，所述的粘度调节剂为合成蜡，软化点为100-120℃，所述的填料为细碳酸钙，所述的助剂为抗氧剂，所述的抗氧剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯和β-(3,5-二叔丁基-4-羟基苯基)丙酸正十八碳醇酯的混合物。
一种可降解涂层的制备方法，包括以下步骤：
1)取EVA 35％、增粘树脂40％、粘度调节剂17％、填料7.5％和助剂0.5％，依次缓慢加入搅拌釜中，边搅拌边加热升温至160℃，搅拌速度为40r/min，搅拌时间为1小时，至搅拌均匀。
2)将上述的搅拌均匀物投入挤出机中挤出，所述双螺杆挤出机入口段、中间段与出口段的温度分别控制在120℃、120℃、120℃；
3)上述挤出物通过造粒机冷却加工形成热熔胶颗粒；
4)将热熔胶胶粒加入热熔胶机中，升温至150℃，刮涂在纸上，涂胶量为15-20克/平方米，而制作成有热熔涂层的预涂纸；
5)把预涂纸经过热封、冷却、成型为纸吸管状。
实验例
通过以上实施例，制作出涂有热熔胶涂层的预涂纸，分别裁剪成1.4cm*10cm的长纸条若干，把长纸条放置于高湿避光的土壤中，一段时间后，取出纸条，洗去泥土，烘干、测试，制作出下表：
Figure BDA0002470004060000041
本发明的有益效果是：
先制作好热熔胶，并把热熔涂层预涂在吸管纸上，做成半成品，然后再把预涂好涂层的吸管纸经过热封、成型，卷成吸管；这种纸吸管具有着可耐100℃沸水，可降解的优点。
本发明的上述实施例并不是对本发明保护范围的限定，本发明的实施方式不限于此，凡此种种根据本发明的上述内容，按照本领域的普通技术知识和惯用手段，在不脱离本发明上述基本技术思想前提下，对本发明上述结构做出的其它多种形式的修改、替换或变更，均应落在本发明的保护范围之内。

Claims (10)

1.一种可降解涂层，其特征在于，包括以下重量百分比的原料：EVA：30-40%、增粘树脂：35-45%、粘度调节剂：15-20%、填料：5-15%和助剂：0.3-1%。
2.如权利要求1所述的可降解涂层，其特征在于，由以下重量百分比的成分组成：所述的EVA由低熔指EVA与高熔指EVA组成，EVA的熔融指数分别为150g/10min与400g/10min，所述的高熔融指数EVA与低熔融指数EVA的配比为1：3。
3.如权利要求2所述的可降解涂层，其特征在于：所述的EVA中的VA含量为28%。
4.如权利要求1所述的可降解涂层，其特征在于：所述的增粘树脂为松香酯与碳9石油树脂的混合物，且松香酯与碳9石油树脂的配比为3：1。
5.如权利要求1所述的可降解涂层，其特征在于：所述的粘度调节剂为合成蜡，软化点为100-120℃。
6.如权利要求1所述的可降解涂层，其特征在于：所述的填料为细碳酸钙。
7.如权利要求1所述的可降解涂层，其特征在于：所述的助剂为抗氧剂。
8.如权利要求7所述的可降解涂层，其特征在于：所述的抗氧剂为四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯或β-（3,5-二叔丁基-4-羟基苯基）丙酸正十八碳醇酯中一种或两种混合。
9.一种可降解涂层的制备方法，其特征在于，包括以下步骤：
1）取EVA、增粘树脂、粘度调节剂、填料、助剂，依次缓慢加入搅拌釜中，边搅拌边加热升温至150-160℃，搅拌速度为35-40r/min，搅拌时间为1-2小时；
2）将上述的搅拌均匀物投入挤出机中挤出，所述双螺杆挤出机入口段、中间段与出口段的温度分别控制在100-120℃、100-120℃、100-120℃；
3）上述挤出物通过造粒机冷却加工形成热熔胶颗粒；
4）将热熔胶胶粒加入热熔胶机中，升温至150℃，刮涂在纸上，涂胶量为15-20克/平方米，而制作成有热熔涂层的预涂纸；
5）把预涂纸经过热封、冷却、成型。
10.一种采用权利要求1-9中任一项所述的可降解涂层在纸吸管中的应用。
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