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CN109485969A - 一种免处理微发泡贴膜包装纸材料及其制备方法 - Google Patents

一种免处理微发泡贴膜包装纸材料及其制备方法 Download PDF

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CN109485969A
CN109485969A CN201811277382.7A CN201811277382A CN109485969A CN 109485969 A CN109485969 A CN 109485969A CN 201811277382 A CN201811277382 A CN 201811277382A CN 109485969 A CN109485969 A CN 109485969A
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parts
pad pasting
wrapping paper
polyethylene
nano
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王滨
刘曙阳
蒋顶军
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NANJING JULONG TECHNOLOGY Co Ltd
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NANJING JULONG TECHNOLOGY Co Ltd
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Abstract

本发明涉及一种贴膜包装纸及其制备方法，尤其是一种免处理微发泡贴膜包装纸材料及其制备方法。本发明的材料包括以下重量份数的组分：聚乙烯80‑90份，聚烯丙基胺盐酸盐1‑10份，纳米氧化物1‑5份，两亲性嵌段共聚物1‑5份，发泡剂0.5‑5份，防粘连剂0.2‑1份，发泡助剂1‑5份，其他助剂0.5‑2份，并公开了其制备方法。本发明材料具有熔体成型拉伸性能好，发泡泡孔孔径小，泡孔密度高，发泡膜厚度可达20微米以下，产品重量轻，抗拉强度高，耐撕裂性能高，耐热性优异，可用于有80℃以上高温要求的包装领域；同时，产品环保，可生物降解；另外，产品具有优异的对油类物质阻隔性；同时，与纸张粘接力强，省去薄膜表面后处理过程，生产率高。

Description

一种免处理微发泡贴膜包装纸材料及其制备方法
技术领域
本发明涉及一种免处理微发泡贴膜包装纸材料及其制备方法，属于材料技术领域。
背景技术
日常生活中，纸袋因其方便、环保越来越流行；另一方面，人们为了包装防水，在纸袋内表面通常会内贴一层塑料膜，主要是聚乙烯(PE)薄膜。目前，主要面临问题如下：1、因聚乙烯为非极性材料，在与纸张等极性表面粘接时，必须做电离等表面处理，设备复杂，工序繁多，且合格率普遍不高；2、质量不稳定导致，贴合处可能会出现气泡，影响袋子使用寿命；3、在原材料价格不断上涨压力下，对只有十几，至多30μm厚度的PE薄膜，降低成本困难重重。至今仍无法很好解决。
发明内容
针对以上问题，本发明采用自组装与微孔发泡技术创新结合，在满足薄膜使用前提下，利用两亲嵌段共聚物自组装复合，显著提高了薄膜表面极性，无需再进行表面改性或处理，实现了PE薄膜与纸张直接粘结，生产效率大幅提高；同时，薄膜表面极性均匀性增加，与纸张贴合合格率增加；通过控制发泡孔径，实现了膜厚可达20μm以下的微孔发泡薄膜，产品重量减轻超过30％，显著降低了制造成本，同时，便捷性更好，尽可能减少了不可降解塑料的使用，有利于环保；另外，产品具有优异的对油类物质阻隔性；同时，与纸张粘接力强，省去薄膜表面后处理过程，生产率高。
为实现上述目的，本发明采用如下技术方案：
一种免处理微发泡贴膜包装纸材料，材料包括以下重量份数的组分：
聚乙烯80-90份
聚烯丙基胺盐酸盐1-10份
纳米氧化物1-5份
两亲性嵌段共聚物1-5份
发泡剂0.5-5份
防粘连剂0.2-1份
发泡助剂1-5份
其他助剂0.5-2份
进一步方案，所述聚乙烯为高密度聚乙烯(HDPE)、低密度聚乙烯(LDPE)，线性低密度聚乙烯(LLDPE)中的一种或两种混合物，优选低密度聚乙烯与线性低密度聚乙烯混合物。
进一步方案，所述聚烯丙基胺盐酸盐为聚烯丙基胺盐酸钠，聚烯丙基胺盐酸钙，聚烯丙基胺盐酸锌，聚烯丙基胺盐酸锂，聚烯丙基胺盐酸钾中的一种，优选聚烯丙基胺盐酸钠。
进一步方案，所述的纳米氧化物为纳米二氧化硅，纳米二氧化钛，纳米氧化铜，纳米氧化镁，纳米氧化铝，纳米氧化铈中的一种，优选纳米二氧化硅。
进一步方案，所述两亲性嵌段共聚物为聚乙烯吡咯烷酮(PVP)，海藻酸-聚乳酸嵌段共聚物，海藻酸钠-聚乳酸嵌段共聚物，明胶，磷脂，胆固醇，阿拉伯胶，聚谷氨酸，聚乙烯-聚环氧乙烷嵌段共聚物，聚氧化乙烯-聚己内酯嵌段共聚物中的一种，优选海藻酸钠-聚乳酸嵌段共聚物。
进一步方案，所述的发泡剂为物理化学复合发泡剂，其中物理发泡剂为二氧化碳，氮气，丁烷，戊烷中的一种，优选氮气；化学发泡剂为吸热型无机发泡剂，例如碳酸盐类发泡剂，碳酸氢盐类发泡剂，硝酸盐类发泡剂等，优选碳酸钠。
进一步方案，所述的发泡助剂为PH值不低于4的有机酸及其盐类，例如硬脂酸及其金属盐类、硼酸及其盐类、磺酸或亚磺酸及其盐类、甘氨酸及其盐类等；优选硬脂酸。
进一步方案，所述防粘连剂为纳米蒙脱土，超细硅藻土，超细滑石粉，超细碳酸钙中的一种，优选超细硅藻土；所述其他助剂为光稳定剂和抗氧剂，所述光稳定剂为944，770，3808中的一种，优选3808；抗氧剂为1010、1098、168中的一种，优选1010。
进一步方案，所述的免处理微发泡贴膜包装纸材料的制备方法，其特征在于：包括以下步骤：
步骤一：将聚烯丙基胺盐酸盐，纳米氧化物，两亲性嵌段共聚物按照重量份数在中速混合机中预混合0.5-2min，后将混合物通过料斗加入到单螺杆挤出机中，通过挤出、造粒获得两亲性复合母粒；
步骤二，将两亲性复合母粒与聚乙烯，无机发泡剂，防粘连剂，发泡助剂，其他助剂按照重量份数添加到单螺杆薄膜挤出机中，将物理发泡剂通过计量按照重量份数机筒顶部加气口加入挤出机中，在130-200℃温度下，进行挤出流延成免表面处理发泡聚乙烯膜，同时，利用延压辊将纸张引入，获得具有微孔形态的微发泡聚乙烯贴膜包装纸。其中，挤出机温度设置为“倒马鞍”形设置，挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比大于等于20：1。
所述的“倒马鞍”口温度很低，中间高，出口温度低的这种温度设置；更进一步的，所述的倒马鞍温度设置为进口：100-140；中间温度为150-180；出口温度为100-140；挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比大于等于20：1，优选28：1。
有益效果
与现有技术相比，本发明具有如下优点：
1、本发明采用自组装与微孔发泡技术创新结合，在满足薄膜使用前提下，利用两亲嵌段共聚物自组装复合，显著提高了PE薄膜表面极性，膜与纸粘接力强，无需再进行表面改性或处理，实现了PE薄膜与纸张直接粘结，生产效率大幅提高；同时，薄膜表面极性均匀性增加，与纸张贴合合格率增加；整个生产过程环保无污染。
2、本发明材料为微发泡材料，通过无机发泡剂的成核作用，有效控制发泡泡孔孔径，获得了泡孔密度高，膜厚可达20μm以下的微孔发泡薄膜，产品重量减轻超过30％，显著降低了制造成本。而且，本发明中发泡助剂的使用可以有效提高发泡剂分解效率，发气量以及降低发泡剂残留，有利于产品重量减轻。同时，产品便捷性更好；这也尽可能减少了不可降解塑料的使用，有利于环保；
3、本发明还具有优良的抗静电特性，解决了运输或纸张贴合成型过程中静电黏附、沾灰尘问题。
4、本发明提供该材料的制备方法，工艺可控，效率高、易于实现工业化。
具体实施方式
实施例1
步骤一：将聚烯丙基胺盐酸钠5份，纳米二氧化硅1份，海藻酸钠-聚乳酸嵌段共聚物3份，按照重量份数在中速混合机中预混合0.5-2min，后将混合物通过料斗加入到单螺杆挤出机中，通过挤出、造粒获得两亲性复合母粒；
步骤二，将两亲性复合母粒与LDPE65份与LLDPE20份，超细硅藻土0.2份，碳酸钠1.5份，硬脂酸2份，其他助剂为光敏剂3808为0.2份，抗氧化剂1010为0.3份按照重量份数添加到单螺杆薄膜挤出机中，将物理发泡剂二氧化碳0.5份通过计量按照重量份数机筒顶部加气口加入挤出机中，在130-200℃温度下，进行挤出流延成免表面处理发泡聚乙烯膜，同时，利用延压辊将纸张引入，获得具有微孔形态的微发泡聚乙烯贴膜包装纸。其中，挤出机温度设置为“倒马鞍”形设置，挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比为20：1。
所述的倒马鞍温度设置为进口：100；中间温度为150；出口温度为100。
所述的发泡助剂Ph为4.7。
实施例2
步骤一：将聚烯丙基胺盐酸钙10份，纳米二氧化钛5份，PVP 1份，按照重量份数在中速混合机中预混合0.5-2min，后将混合物通过料斗加入到单螺杆挤出机中，通过挤出、造粒获得两亲性复合母粒；
步骤二，将两亲性复合母粒与LLDPE80份，超细滑石粉0.5份，碳酸氢钠0.3份，硼酸1份，其他助剂为光敏剂3808为1份，抗氧化剂1010为1份按照重量份数添加到单螺杆薄膜挤出机中，将物理发泡剂氮气0.2份通过计量按照重量份数机筒顶部加气口加入挤出机中，在130-200℃温度下，进行挤出流延成免表面处理发泡聚乙烯膜，同时，利用延压辊将纸张引入，获得具有微孔形态的微发泡聚乙烯贴膜包装纸。其中，挤出机温度设置为“倒马鞍”形设置，挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比为25：1。
所述的倒马鞍温度设置为进口：140；中间温度为180；出口温度为140；
所述的发泡助剂Ph为4。
实施例3
步骤一：将烯丙基胺盐酸锂1份，纳米氧化铜3份，聚谷氨酸2份，按照重量份数在中速混合机中预混合0.5-2min，后将混合物通过料斗加入到单螺杆挤出机中，通过挤出、造粒获得两亲性复合母粒；
步骤二，将两亲性复合母粒与LDPE70份与HDPE20份，超细硅藻土1份，碳酸氢铵2份，甘氨酸3份，其他助剂为光敏剂3808为0.4份，抗氧化剂1010为0.6份按照重量份数添加到单螺杆薄膜挤出机中，将物理发泡剂丁烷1份通过计量按照重量份数机筒顶部加气口加入挤出机中，在130-200℃温度下，进行挤出流延成免表面处理发泡聚乙烯膜，同时，利用延压辊将纸张引入，获得具有微孔形态的微发泡聚乙烯贴膜包装纸。其中，挤出机温度设置为“倒马鞍”形设置，挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比为36：1。
所述的倒马鞍温度设置为进口：110；中间温度为160；出口温度为120；
所述的发泡助剂Ph为5.6。
实施例4
步骤一：将聚烯丙基胺盐酸钠3份，纳米氧化镁2份，海藻酸钠-聚乳酸嵌段共聚物5份，按照重量份数在中速混合机中预混合0.5-2min，后将混合物通过料斗加入到单螺杆挤出机中，通过挤出、造粒获得两亲性复合母粒；
步骤二，将两亲性复合母粒与LDPE82份，超细滑石粉0.6份，碳酸氢钠4份，甘氨酸钠5份，其他助剂为光敏剂3808为0.3份，抗氧化剂1010为0.7份按照重量份数添加到单螺杆薄膜挤出机中，将物理发泡剂氮气1份通过计量按照重量份数机筒顶部加气口加入挤出机中，在130-200℃温度下，进行挤出流延成免表面处理发泡聚乙烯膜，同时，利用延压辊将纸张引入，获得具有微孔形态的微发泡聚乙烯贴膜包装纸。其中，挤出机温度设置为“倒马鞍”形设置，挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比为28：1。
所述的倒马鞍温度设置为进口：120；中间温度为170；出口温度为110；
所述的发泡助剂Ph为8.6。
根据上述制备方法，对比例1、实施例1、实施例2、实施例3、实施例4，具体配方如下表所示：
对上表中的对比例和实施例进行检测，性能结果如下表所示：
从以上结果可以看出，与对比例1比较，本发明实施例1、实施例2、实施例3、实施例4产品密度降低超过30％，抗拉强度更高，产品表面张力明显优于对比例1，可直接用于与高极性纸张等物质进行粘接，无需进行表面处理。
以上所述仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本领域的技术人员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 (11)

1.一种免处理微发泡贴膜包装纸材料，其特征在于，材料包括以下重量份数的组分：
聚乙烯80-90份
聚烯丙基胺盐酸盐1-10份
纳米氧化物1-5份
两亲性嵌段共聚物1-5份
发泡剂0.5-5份
防粘连剂0.2-1份
发泡助剂1-5份
其他助剂0.5-2份。
2.根据权利要求1所述免处理微发泡贴膜包装纸材料，其特征在于：所述聚烯丙基胺盐酸盐为聚烯丙基胺盐酸钠，聚烯丙基胺盐酸钙，聚烯丙基胺盐酸锌，聚烯丙基胺盐酸锂，聚烯丙基胺盐酸钾中的一种。
3.根据权利要求2所述免处理微发泡贴膜包装纸材料，其特征在于：所述的所述聚烯丙基胺盐酸盐为聚烯丙基胺盐酸钾。
4.根据权利要求1所述免处理微发泡贴膜包装纸材料，其特征在于：所述的纳米氧化物为纳米二氧化硅，纳米二氧化钛，纳米氧化铜，纳米氧化镁，纳米氧化铝，纳米氧化铈中的一种，所述的发泡助剂为PH值不低于4的有机酸及其盐类；所述聚乙烯为高密度聚乙烯、低密度聚乙烯，线性低密度聚乙烯中的一种或两种混合物。
5.根据权利要求1所述免处理微发泡贴膜包装纸材料，其特征在于：所述的纳米氧化物为纳米二氧化硅；所述的聚乙烯为低密度聚乙烯，线性低密度聚乙烯中混合物；所述的发泡助剂为硬脂酸及其金属盐类、硼酸及其盐类、磺酸或亚磺酸及其盐类、甘氨酸及其盐类。
6.根据权利要求1所述免处理微发泡贴膜包装纸材料，其特征在于：所述两亲性嵌段共聚物为聚乙烯吡咯烷酮，海藻酸-聚乳酸嵌段共聚物，海藻酸钠-聚乳酸嵌段共聚物，明胶，磷脂，胆固醇，阿拉伯胶，聚谷氨酸，聚乙烯-聚环氧乙烷嵌段共聚物，聚氧化乙烯-聚己内酯嵌段共聚物中的一种。
7.根据权利要求6所述免处理微发泡贴膜包装纸材料，其特征在于：所述的两亲性嵌段共聚物为海藻酸钠-聚乳酸嵌段共聚物。
8.根据权利要求1所述免处理微发泡贴膜包装纸材料，其特征在于：所述的发泡剂为物理化学复合发泡剂，其中物理发泡剂为二氧化碳，氮气，丁烷，戊烷中的一种；化学发泡剂为吸热型无机发泡剂，所述的无机发泡剂为碳酸盐类发泡剂，碳酸氢盐类发泡剂，硝酸盐类发泡剂；所述的物理发泡剂与化学发泡剂比例为：10：90；所述防粘连剂为纳米蒙脱土，超细硅藻土，超细滑石粉，超细碳酸钙中的一种；所述其他助剂为光稳定剂和抗氧剂，所述光稳定剂为944，770，3808中的一种；抗氧剂为1010、1098、168中的一种。
9.根据权利要求1所述免处理微发泡贴膜包装纸材料，其特征在于：所述的物理发泡剂为氮气，所述的化学发泡剂为碳酸钠；所述防粘连剂为超细硅藻土所述的光稳定剂为3808；所述的抗氧剂为1010。
10.根据权利要求1-9任一项所述的免处理微发泡贴膜包装纸材料的制备方法，其特征在于：包括以下步骤：
步骤一：将聚烯丙基胺盐酸盐，纳米氧化物，两亲性嵌段共聚物按照重量份数在中速混合机中预混合0.5-2min，后将混合物通过料斗加入到单螺杆挤出机中，通过挤出、造粒获得两亲性复合母粒；
步骤二，将两亲性复合母粒与聚乙烯，无机发泡剂，防粘连剂，发泡助剂，其他助剂按照重量份数添加到单螺杆薄膜挤出机中，将物理发泡剂通过计量按照重量份数机筒顶部加气口加入挤出机中，在130-200℃温度下，进行挤出流延成免表面处理发泡聚乙烯膜，同时，利用延压辊将纸张引入，获得具有微孔形态的微发泡聚乙烯贴膜包装纸。
11.根据权利要求10所述的免处理微发泡贴膜包装纸材料的制备方法，其特征在于所述：，挤出机温度设置为“倒马鞍”形设置；所述的倒马鞍温度设置为进口：100-140;中间温度为150-180；出口温度为100-140；挤出机螺杆为分离型、屏障型、分流型螺杆中的一种，压缩比大于等于20：1。
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Application publication date: 20190319