CN109385057A - 一种环保可降解的包装纸 - Google Patents

一种环保可降解的包装纸 Download PDF

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CN109385057A
CN109385057A CN201811031427.2A CN201811031427A CN109385057A CN 109385057 A CN109385057 A CN 109385057A CN 201811031427 A CN201811031427 A CN 201811031427A CN 109385057 A CN109385057 A CN 109385057A
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parts
wrapping paper
enviroment protective
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degradable wrapping
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程小飞
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Anhui Xinxiang Packaging Material Co Ltd
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Abstract

本发明公开了一种环保可降解的包装纸，其原料按重量份包括：牛皮纸100‑120份，聚乳酸40‑60份，改性微球4‑8份，聚‑β‑羟丁酸2‑8份，聚乙烯4‑6份，填充补充剂40‑60份，钛酸酯偶联剂1‑2份，海藻酸钠2‑4份，增塑剂4‑8份，UV531抗紫外线剂1.5‑2.5份。填充补充剂包括：竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土。增塑剂包括：对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香。改性微球采用如下工艺制备：将2,2‑二甲氧基‑2‑苯基苯乙酮乙醇溶液、甲基丙烯酸单封端聚乙二醇水溶液、甲基丙烯酸甲酯混合，氮气保护下搅拌，紫外辐照，离心，干燥得到改性微球。

Description

一种环保可降解的包装纸
技术领域
本发明涉及包装纸技术领域，尤其涉及一种环保可降解的包装纸。
背景技术
聚乳酸是多羟基聚合物，易形成分子内和分子间氢键，需加入小分子增塑剂降低分子间作用力以提高其加工性能，传统的加工方法制备的纯聚乳酸塑料具有很强的亲水性，对湿度敏感，在低湿度环境中，增塑剂会从产品中扩散出来，制品变脆。聚乳酸为疏水性的脂肪族聚酯，与亲水性的聚乳酸是不相容的，简单的将两者共混对力学和耐水性的改善并不明显，亟待解决。
发明内容
基于背景技术存在的技术问题，本发明提出了一种环保可降解的包装纸，易降解，而且耐水性好。
本发明提出的一种环保可降解的包装纸，其原料按重量份包括：牛皮纸100-120份，聚乳酸40-60份，改性微球4-8份，聚-β-羟丁酸2-8份，聚乙烯4-6份，填充补充剂40-60份，钛酸酯偶联剂1-2份，海藻酸钠2-4份，增塑剂4-8份，UV531抗紫外线剂1.5-2.5份。
优选地，填充补充剂包括：竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土。
优选地，竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土的重量比为20-30：10-20：4-8：6-14。
优选地，增塑剂包括：对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香。
优选地，对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香的重量比为1-1.6：1-2：2-4：0.6-1。
优选地，改性微球采用如下工艺制备：将2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、甲基丙烯酸单封端聚乙二醇水溶液、甲基丙烯酸甲酯混合，氮气保护下搅拌，紫外辐照，离心，干燥得到改性微球。
优选地，改性微球的制备工艺中，紫外辐照时间为2-4h，辐照强度为5-6mw/cm。
优选地，改性微球的制备工艺中，2,2-二甲氧基-2-苯基苯乙酮乙醇溶液浓度为8-14wt％，甲基丙烯酸单封端聚乙二醇水溶液浓度为8-10wt％。
优选地，改性微球的制备工艺中，2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、甲基丙烯酸单封端聚乙二醇水溶液、甲基丙烯酸甲酯的重量比为30-40：20-30：6-14。
本发明采用如下步骤制备：
将聚乳酸溶解在水中，加入改性微球、聚-β-羟丁酸、聚乙烯搅拌，升温混炼，干燥，粉碎，干燥得到预处理聚乳酸；
将预处理聚乳酸加热至熔融状态，在搅拌状态下依次加入对苯二甲酸二辛酯、竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土、钛酸酯偶联剂、海藻酸钠、聚乙烯醇、羟基硅油、歧化松香、UV531抗紫外线剂，搅拌均匀，挤出得到薄膜，将薄膜贴覆在牛皮纸表面得到环保可降解的包装纸。
本发明采用改性微球与聚-β-羟丁酸、聚乙烯复配，相互间结合强度极高，包覆在聚乳酸表面，可显著降低聚乳酸表面吸水强度，在对苯二甲酸二辛酯的配合下与竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土的界面相容性极高，在钛酸酯偶联剂的配合下可充分分散其中并以离子键的形式结合，稳定性好，防水性能进一步增强，而聚乙烯醇、羟基硅油、歧化松香可有效提高预处理聚乳酸的亲和性，防水性能进一步增强。本发明的改性微球中，以甲基丙烯酸甲酯为单体，甲基丙烯酸单封端聚乙二醇作为反应性高分子，在2,2-二甲氧基-2-苯基苯乙酮的配合下由紫外光照进行聚合得到表面带有功能高分子链的单分散改性微球。
具体实施方式
下面，通过具体实施例对本发明的技术方案进行详细说明。
实施例1
一种环保可降解的包装纸，其原料包括：牛皮纸100kg，聚乳酸60kg，改性微球4kg，聚-β-羟丁酸8kg，聚乙烯4kg，填充补充剂60kg，钛酸酯偶联剂1kg，海藻酸钠4kg，增塑剂4kg，UV531抗紫外线剂2.5kg。
填充补充剂由竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土按重量比为20：20：4：14组成。增塑剂由对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香按重量比为1：2：2：1组成。
改性微球采用如下工艺制备：将30kg浓度为14wt％的2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、20kg浓度为10wt％的甲基丙烯酸单封端聚乙二醇水溶液、6kg甲基丙烯酸甲酯混合，氮气保护下搅拌30min，紫外辐照2h，辐照强度为6mw/cm，离心，干燥得到改性微球。
实施例2
一种环保可降解的包装纸，其原料包括：牛皮纸120kg，聚乳酸40kg，改性微球8kg，聚-β-羟丁酸2kg，聚乙烯6kg，填充补充剂40kg，钛酸酯偶联剂2kg，海藻酸钠2kg，增塑剂8kg，UV531抗紫外线剂1.5kg。
填充补充剂由竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土按重量比为30：10：8：6组成。增塑剂由对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香按重量比为1.6：1：4：0.6组成。
改性微球采用如下工艺制备：将40kg浓度为8wt％的2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、30kg浓度为8wt％的甲基丙烯酸单封端聚乙二醇水溶液、14kg甲基丙烯酸甲酯混合，氮气保护下搅拌20min，紫外辐照4h，辐照强度为5mw/cm，离心，干燥得到改性微球。
实施例3
一种环保可降解的包装纸，其原料包括：牛皮纸105kg，聚乳酸55kg，改性微球5kg，聚-β-羟丁酸6kg，聚乙烯4.5kg，填充补充剂55kg，钛酸酯偶联剂1.2kg，海藻酸钠3.5kg，增塑剂5kg，UV531抗紫外线剂2.2kg。
填充补充剂由竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土按重量比为22：17：5：12组成。增塑剂由对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香按重量比为1.2：1.7：2.5：0.9组成。
改性微球采用如下工艺制备：将33kg浓度为12wt％的2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、22kg浓度为9.5wt％的甲基丙烯酸单封端聚乙二醇水溶液、8kg甲基丙烯酸甲酯混合，氮气保护下搅拌28min，紫外辐照2.5h，辐照强度为5.8mw/cm，离心，干燥得到改性微球。
实施例4
一种环保可降解的包装纸，其原料包括：牛皮纸115kg，聚乳酸45kg，改性微球7kg，聚-β-羟丁酸4kg，聚乙烯5.5kg，填充补充剂45kg，钛酸酯偶联剂1.8kg，海藻酸钠2.5kg，增塑剂7kg，UV531抗紫外线剂1.8kg。
填充补充剂由竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土按重量比为28：13：7：8组成。增塑剂由对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香按重量比为1.4：1.3：3.5：0.7组成。
改性微球采用如下工艺制备：将37kg浓度为10wt％的2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、28kg浓度为8.5wt％的甲基丙烯酸单封端聚乙二醇水溶液、12kg甲基丙烯酸甲酯混合，氮气保护下搅拌22min，紫外辐照3.5h，辐照强度为5.2mw/cm，离心，干燥得到改性微球。
实施例5
一种环保可降解的包装纸，其原料包括：牛皮纸110kg，聚乳酸50kg，改性微球6kg，聚-β-羟丁酸5kg，聚乙烯5kg，填充补充剂50kg，钛酸酯偶联剂1.5kg，海藻酸钠3kg，增塑剂6kg，UV531抗紫外线剂2kg。
填充补充剂由竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土按重量比为25：15：6：10组成。增塑剂由对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香按重量比为1.3：1.5：3：0.8组成。
改性微球采用如下工艺制备：将35kg浓度为11wt％的2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、25kg浓度为9wt％的甲基丙烯酸单封端聚乙二醇水溶液、10kg甲基丙烯酸甲酯混合，氮气保护下搅拌25min，紫外辐照3h，辐照强度为5.5mw/cm，离心，干燥得到改性微球。
实施例5所得环保可降解的包装纸在恒温70℃、湿度90％的处理200h，不渗水，而且强度保持率可达78％，具有很强的防水性，具备生物降解性能，在土壤中微生物代谢作用下最终转变成CO2和H2O，不会给环境带来污染，有望成为新型包装材料被广泛应用。
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发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。

Claims (9)

1.一种环保可降解的包装纸，其特征在于，其原料按重量份包括：牛皮纸100-120份，聚乳酸40-60份，改性微球4-8份，聚-β-羟丁酸2-8份，聚乙烯4-6份，填充补充剂40-60份，钛酸酯偶联剂1-2份，海藻酸钠2-4份，增塑剂4-8份，UV531抗紫外线剂1.5-2.5份。
2.根据权利要求1所述环保可降解的包装纸，其特征在于，填充补充剂包括：竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土。
3.根据权利要求2所述环保可降解的包装纸，其特征在于，竹屑纤维、沉淀硫酸钡、海泡石粉、煅烧高岭土的重量比为20-30：10-20：4-8：6-14。
4.根据权利要求1-3任一项所述环保可降解的包装纸，其特征在于，增塑剂包括：对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香。
5.根据权利要求4所述环保可降解的包装纸，其特征在于，对苯二甲酸二辛酯、聚乙烯醇、羟基硅油、歧化松香的重量比为1-1.6：1-2：2-4：0.6-1。
6.根据权利要求1-5任一项所述环保可降解的包装纸，其特征在于，改性微球采用如下工艺制备：将2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、甲基丙烯酸单封端聚乙二醇水溶液、甲基丙烯酸甲酯混合，氮气保护下搅拌，紫外辐照，离心，干燥得到改性微球。
7.根据权利要求6所述环保可降解的包装纸，其特征在于，改性微球的制备工艺中，紫外辐照时间为2-4h，辐照强度为5-6mw/cm。
8.根据权利要求6或7所述环保可降解的包装纸，其特征在于，改性微球的制备工艺中，2,2-二甲氧基-2-苯基苯乙酮乙醇溶液浓度为8-14wt％，甲基丙烯酸单封端聚乙二醇水溶液浓度为8-10wt％。
9.根据权利要求6-8任一项所述环保可降解的包装纸，其特征在于，改性微球的制备工艺中，2,2-二甲氧基-2-苯基苯乙酮乙醇溶液、甲基丙烯酸单封端聚乙二醇水溶液、甲基丙烯酸甲酯的重量比为30-40：20-30：6-14。
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