CN113024977A - 一种耐热型保鲜膜及其制备方法 - Google Patents

一种耐热型保鲜膜及其制备方法 Download PDF

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CN113024977A
CN113024977A CN201911350415.0A CN201911350415A CN113024977A CN 113024977 A CN113024977 A CN 113024977A CN 201911350415 A CN201911350415 A CN 201911350415A CN 113024977 A CN113024977 A CN 113024977A
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俞育新
倪文英
华科
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Abstract

本发明公开了一种耐热型保鲜膜及其制备方法，其中，耐热型保鲜膜按重量份数包括聚乙烯醇100份、增性剂10‑20份、聚酰亚胺5‑10份、增韧剂2‑5份、抗氧化剂1‑3份、阻燃剂1‑4份、抗菌剂0.5‑3份、微孔成型剂3‑8份，本发明制备的保鲜膜通过加入聚酰亚胺，将其作为耐热剂使用，可以提高保鲜膜成品的耐热性能，防止受热熔融，同时通过微孔成型剂的使用既可以增强保鲜膜的机械性能，又可以防止保鲜膜在受热时炸裂，具有较好的耐热性能。

Description

一种耐热型保鲜膜及其制备方法
技术领域
本发明涉及保鲜膜材料技术领域，尤其涉及一种耐热型保鲜膜及其制备方法。
背景技术
保鲜膜是一种塑料包装制品，通常以乙烯为母料通过聚合反应制成，其在微波炉食品加热、冰箱食物保存、生鲜及熟食包装等场合，以及在家庭生活、超市卖场、宾馆饭店及工业生产的食品包装领域都有广泛应用。
不同场合、不同食品应选用不同的保鲜膜。市场上的保鲜膜大体分为两类，一类是普通保鲜膜，适用于冰箱保鲜，一类是微波炉保鲜膜，既可用于冰箱保鲜，也可用于微波炉，后一种保鲜膜在耐热、无毒性等方面远远优于普通保鲜膜。因此，消费者在使用选择上要特别注意，分项使用。但现有的食品保鲜膜普遍存在力学性能、耐热性能不足，导致保鲜膜韧性差，受热易分解，并且无抑菌杀菌功能。
发明内容
本发明的目的在于提供一种耐热型保鲜膜及其制备方法，以解决上述背景技术中所提出的问题。
为达到上述目的，本发明采用的技术方案是：一种耐热型保鲜膜，按重量份数包括如下组分，
Figure BDA0002334524530000011
Figure BDA0002334524530000021
作为进一步的优化，所述增性剂为明胶或壳聚糖中一种或两种。
作为进一步的优化，所述增韧剂为丙烯酸酯类聚合物。
作为进一步的优化，所述抗氧化剂为特丁基对苯二酚。
作为进一步的优化，所述阻燃剂为氢氧化镁和氢氧化铝组成的复配物。
作为进一步的优化，氢氧化镁和氢氧化铝的重量比为1:(0.5-1)。
作为进一步的优化，所述抗菌剂为银离子抗菌剂。
作为进一步的优化，所述微孔成型剂为纳米二氧化硅、沸石或纳米晶须中的一种或两种。
本发明还提供了一种耐热型保鲜膜的制备方法，包括如下步骤，
S1)将聚乙烯醇、增性剂和聚酰亚胺加入搅拌釜内搅拌均匀，制得主料混合物；
S2)将主料混合物、增韧剂、抗氧化剂、阻燃剂、抗菌剂和微孔成型剂加入双螺杆挤出机，使材料充分融合、反应，经挤出、水冷、切割，然后经吹膜机吹膜即得成品膜。
与现有技术相比，本发明的有益效果是：
1.通过加入聚酰亚胺，将其作为耐热剂使用，可以提高保鲜膜成品的耐热性能，防止受热熔融；
2.微孔成型剂(纳米二氧化硅、纳米晶须、沸石)具有纳米尺寸，单独使用或复配使用时可以使保鲜膜成品具有良好的透气性、韧性和机械强度，具有透气性一方面可以防止保鲜膜内的产品腐烂变质，另一方面在进行高温加热(如微波加热)时，有助于气体交换，可以防止保鲜膜炸裂；
3.银离子无机抗菌添加剂是一种高效安全和耐热的无机材料，赋予保鲜膜具有良好的抗菌作用。
具体实施方式
以下是本发明的具体实施例，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
实施例1
一种耐热型保鲜膜，按重量份数包括如下组分，
Figure BDA0002334524530000031
Figure BDA0002334524530000041
其制备方法为：S1)将聚乙烯醇、明胶和聚酰亚胺加入搅拌釜内搅拌均匀，制得主料混合物；S2)将主料混合物、丙烯酸酯类聚合物、特丁基对苯二酚、氢氧化镁、氢氧化铝、银离子抗菌剂和纳米二氧化硅加入双螺杆挤出机，使材料充分融合、反应，经挤出、水冷、切割，然后经吹膜机吹膜即得成品膜。
实施例2
一种耐热型保鲜膜，按重量份数包括如下组分，
Figure BDA0002334524530000042
其制备方法为：S1)将聚乙烯醇、增性剂和聚酰亚胺加入搅拌釜内搅拌均匀，制得主料混合物；S2)将主料混合物、丙烯酸酯类聚合物、特丁基对苯二酚、氢氧化镁、氢氧化铝、银离子抗菌剂和沸石加入双螺杆挤出机，使材料充分融合、反应，经挤出、水冷、切割，然后经吹膜机吹膜即得成品膜。
实施例3
一种耐热型保鲜膜，按重量份数包括如下组分，
Figure BDA0002334524530000051
其制备方法为：S1)将聚乙烯醇、增性剂和聚酰亚胺加入搅拌釜内搅拌均匀，制得主料混合物；S2)将主料混合物、丙烯酸酯类聚合物、特丁基对苯二酚、氢氧化镁、氢氧化铝、银离子抗菌剂、纳米二氧化硅和纳米晶须加入双螺杆挤出机，使材料充分融合、反应，经挤出、水冷、切割，然后经吹膜机吹膜即得成品膜。
实施例4
一种耐热型保鲜膜，按重量份数包括如下组分，
Figure BDA0002334524530000052
Figure BDA0002334524530000061
其制备方法为：S1)将聚乙烯醇、增性剂和聚酰亚胺加入搅拌釜内搅拌均匀，制得主料混合物；S2)将主料混合物、丙烯酸酯类聚合物、特丁基对苯二酚、氢氧化镁、氢氧化铝、银离子抗菌剂和纳米晶须加入双螺杆挤出机，使材料充分融合、反应，经挤出、水冷、切割，然后经吹膜机吹膜即得成品膜。
应用实施例
Figure BDA0002334524530000062
对实施例1至4制备得到的保鲜膜及市售常规保鲜膜进行性能测试，机械性能按GB/T13022-1991测定拉伸强度和断裂伸长率，耐热性测试将保鲜膜放置于高温箱中，升高温度至有成分渗出，记录温度，温度值高则表明保鲜膜具有较好的耐热性。
通过实验数据可知，在添加有聚亚酰胺和微孔成型剂的保鲜膜中，其具有较好的机械性能和耐温性能，加入阻燃剂可以赋予保鲜膜阻燃功能，同时通过银离子抗菌剂可具有较好的抗菌性能，而且该种抗菌剂亦可耐受高温。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (9)

1.一种耐热型保鲜膜，其特征在于，按重量份数包括如下组分，
Figure FDA0002334524520000011
2.根据权利要求1所述的耐热型保鲜膜，其特征在于，所述增性剂为明胶或壳聚糖中的一种或两种。
3.根据权利要求1所述的耐热型保鲜膜，其特征在于，所述增韧剂为丙烯酸酯类聚合物。
4.根据权利要求1所述的耐热型保鲜膜，其特征在于，所述抗氧化剂为特丁基对苯二酚。
5.根据权利要求1所述的耐热型保鲜膜，其特征在于，所述阻燃剂为氢氧化镁和氢氧化铝组成的复配物。
6.根据权利要求5所述的耐热型保鲜膜，其特征在于，氢氧化镁和氢氧化铝的重量比为1:(0.5-1)。
7.根据权利要求1所述的耐热型保鲜膜，其特征在于，所述抗菌剂为银离子抗菌剂。
8.根据权利要求1所述的耐热型保鲜膜，其特征在于，所述微孔成型剂为纳米二氧化硅、沸石或纳米晶须中的一种或两种。
9.一种根据权利要求1至8任意一项所述的耐热型保鲜膜的制备方法，其特征在于，包括如下步骤，
S1)将聚乙烯醇、增性剂和聚酰亚胺加入搅拌釜内搅拌均匀，制得主料混合物；
S2)将主料混合物、增韧剂、抗氧化剂、阻燃剂、抗菌剂和微孔成型剂加入双螺杆挤出机，使材料充分融合、反应，经挤出、水冷、切割，然后经吹膜机吹膜即得成品膜。
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Application publication date: 20210625