CN113561595A - 一种厌氧发酵复合降解纸袋及制备方法 - Google Patents
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Abstract
本发明公开了一种厌氧发酵复合降解纸袋及制备方法，所述厌氧发酵复合降解纸袋包括纸质外层和塑料内层，其中，塑料内层由POE弹性体和茂金属线性低密度聚乙烯按重量份配比分别为10‑20份和80‑90份制备，所述纸质外层为牛皮纸。本发明有较好的封温性能和可降解性能，在袋子破碎后在厌氧条件下可短期内被厌氧发酵降解，设计简便，绿色环保。
Description
技术领域
本发明涉纸袋技术领域，尤其涉及一种厌氧发酵复合降解纸袋及制备方法。
背景技术
随着经济的发展，科技的进步，人类社会对社会资源的利用越来 越深入，纸塑袋因为便于装运小宗款装粉粒状物料,获得广泛使用。 但是，现有的纸塑袋热封性较差，常常会导致热封处破裂，同时现有 的纸塑袋降解性差。
发明内容
为了实现上述目的，本发明采用了如下技术方案：
一种厌氧发酵复合降解纸袋，所述厌氧发酵复合降解纸袋包括纸 质外层和塑料内层，其中，塑料内层由POE弹性体和茂金属线性低密 度聚乙烯按一定的重量份配比制备，所述纸质外层为本色牛皮纸构成。
优选地，所述POE弹性体和所述茂金属线性低密度聚乙烯重量份 配比为：茂金属线性低密度聚乙烯80-90份，POE弹性体10-20份。
优选地，所述POE弹性体密度为0.86-0.92g/cm3，熔融指数为 1.0-2.0g/10min；所述茂金属线性低密度聚乙烯密度为 0.91-0.93g/cm3，熔融指数为1.0-2.0g/10min。
优选地，所述纸质外层厚度为0.080-0.120mm，所述塑料内层厚 度为纸质外层厚度的5％。
本发明还提供了一种厌氧发酵复合降解纸袋的制备方法，包括以 下步骤：
S1.将POE弹性体与茂金属线性低密度聚乙烯经高速搅拌机加热搅拌 8min，混合均匀后出料，当混合料的温度为某一温度时，将混合料通 过挤出吹膜机制得薄膜；
S2.将所述薄膜进行加热涂覆于纸质外层的内表面上形成塑料内层， 或者将薄膜切割、拉丝和编织成塑料内层，将所述塑料内层通过粘合 剂粘合在纸质外层的内表面以制得厌氧发酵可降解纸。
S3.将所述厌氧发酵可降解纸加工成厌氧发酵可降解袋。
优选地，步骤S1中混合料的温度为15-25℃，挤出吹膜成型的 温度为160℃-180℃。
本发明具有如下有益效果：
本发明有较好的封温性能和可降解性能，在袋子破碎后在厌氧条 件下可短期内被厌氧发酵降解，设计简便，绿色环保。
附图说明
图1为本发明提供的厌氧发酵复合降解纸袋的热封性能实验数据表。
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。实例一：
将90份POE弹性体与10份茂金属线性低密度聚乙烯经高速搅拌 机加热搅拌8min，混合均匀后以混合料的温度为35℃、挤出吹膜成 型温度为180℃通过挤出吹膜机制得薄膜，薄膜层厚度为纸质外层厚 度的5％，其中纸质外层为厚度为0.100mm的本色牛皮纸，将薄膜进 行加热涂覆于纸质外层的内表面上形成塑料内层以制得厌氧发酵可 降解纸，其中POE弹性体密度为0.86-0.92g/cm3，熔融指数为 1.0-2.0g/10min，茂金属线性低密度聚乙烯密度为0.91-0.93g/cm3， 熔融指数为1.0-2.0g/10min。
实例二：
将85份POE弹性体与15份茂金属线性低密度聚乙烯经高速搅拌机加 热搅拌8min，混合均匀后以混合料的温度为40℃、挤出成型温度为 170℃通过挤出吹膜机制得薄膜，薄膜层厚度为纸质外层厚度的5％， 其中纸质外层为厚度为0.100mm的本色牛皮纸，将薄膜进行加热涂覆 于纸质外层的内表面上形成塑料内层以制得厌氧发酵可降解纸，其中 POE弹性体密度为0.86-0.92g/cm3，熔融指数为1.0-2.0g/10min， 茂金属线性低密度聚乙烯密度为0.91-0.93g/cm3，熔融指数为 1.0-2.0g/10min。
实例三：
将80份POE弹性体与20份茂金属线性低密度聚乙烯经高速搅拌机加 热搅拌8min，混合均匀后以混合料的温度为45℃、挤出成型温度为 160℃通过挤出吹膜机制得薄膜，薄膜层厚度为纸质外层厚度的5％， 其中纸质外层为厚度为0.100mm的本色牛皮纸，将薄膜进行加热涂覆 于纸质外层的内表面上形成塑料内层以制得厌氧发酵可降解纸，其中 POE弹性体密度为0.86-0.92g/cm3，熔融指数为1.0-2.0g/10min， 茂金属线性低密度聚乙烯密度为0.91-0.93g/cm3，熔融指数为 1.0-2.0g/10min。
本发明通过调节塑料内层中POE弹性体与茂金属线性低密度聚乙烯的比 例可调节可降解纸袋的热封性能(如图1)，纸质外层与塑料内层厚度占比使 厌氧发酵可降解纸袋有较好的封温性能和可降解性能，在袋子破碎后在厌氧 条件下可短期内被厌氧发酵降解，设计简便，绿色环保。
最后应说明的是：以上所述仅为本发明的优选实施例而已，并不 用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明， 对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技 术方案进行修改，或者对其中部分技术特征进行等同替换，凡在本发 明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包 含在本发明的保护范围之内。
Claims (6)
1.一种厌氧发酵复合降解纸袋，其特征在于：所述厌氧发酵复合降解纸袋包括纸质外层和塑料内层，其中，塑料内层由POE弹性体和茂金属线性低密度聚乙烯按一定的重量份配比制备，所述纸质外层由牛皮纸构成。
2.根据权利要求1所述的一种厌氧发酵复合降解纸袋，其特征在于：所述POE弹性体和所述茂金属线性低密度聚乙烯重量份配比为：POE弹性体10-20份，茂金属线性低密度聚乙烯80-90份。
3.根据权利要求1或2所述的一种厌氧发酵复合降解纸袋，其特征在于：所述POE弹性体密度为0.86-0.92g/cm3，熔融指数为1.0-2.0g/10min；所述茂金属线性低密度聚乙烯密度为0.91-0.93g/cm3，熔融指数为1.0-2.0g/10min。
4.根据权利要求1所述的一种厌氧发酵复合降解纸袋，其特征在于：所述纸质外层厚度为0.080-0.120mm，所述塑料内层厚度为纸质外层厚度的5％。
5.一种厌氧发酵复合降解纸袋的制备方法，包括以下步骤：
S1.将POE弹性体与茂金属线性低密度聚乙烯经高速搅拌机加热搅拌，混合均匀后出料，当混合料的温度为某一温度时，将混合料通过挤出吹膜机制得薄膜；
S2.将所述薄膜进行加热涂覆于纸质外层的内表面上形成塑料内层，以制得厌氧发酵可降解纸；或者将薄膜切割、拉丝和编织成塑料内层，再将所述塑料内层通过粘合剂粘合在纸质外层的内表面，以制得厌氧发酵可降解纸；
S3.将所述厌氧发酵可降解纸加工成厌氧发酵可降解袋。
6.根据权利要求5所述的制备方法，其特征在于：步骤S1中混合料的温度为15-25℃，挤出吹膜成型温度为160℃-180℃。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022951A (zh) * | 2004-08-17 | 2007-08-22 | 日本聚乙烯株式会社 | 层压材料 |
| CN107696623A (zh) * | 2017-10-19 | 2018-02-16 | 江阴升辉包装材料有限公司 | 一种适用于生产线自动快速包装的热收缩膜 |
| CN107856384A (zh) * | 2017-10-19 | 2018-03-30 | 合肥朗胜新材料有限公司 | 一种易降解环保纸塑袋及其制备方法 |
| CN107921767A (zh) * | 2015-08-31 | 2018-04-17 | 普瑞曼聚合物株式会社 | 叠层体及其制造方法、以及密封膜 |
| CN110229416A (zh) * | 2019-06-21 | 2019-09-13 | 广州惠豪包装新材料有限公司 | 一种高强度抗紫外缓冲气垫聚乙烯薄膜及其制备方法 |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022951A (zh) * | 2004-08-17 | 2007-08-22 | 日本聚乙烯株式会社 | 层压材料 |
| CN107921767A (zh) * | 2015-08-31 | 2018-04-17 | 普瑞曼聚合物株式会社 | 叠层体及其制造方法、以及密封膜 |
| CN107696623A (zh) * | 2017-10-19 | 2018-02-16 | 江阴升辉包装材料有限公司 | 一种适用于生产线自动快速包装的热收缩膜 |
| CN107856384A (zh) * | 2017-10-19 | 2018-03-30 | 合肥朗胜新材料有限公司 | 一种易降解环保纸塑袋及其制备方法 |
| CN110229416A (zh) * | 2019-06-21 | 2019-09-13 | 广州惠豪包装新材料有限公司 | 一种高强度抗紫外缓冲气垫聚乙烯薄膜及其制备方法 |
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