CN103613824A - 一种pe抗菌食品保鲜膜的制备方法 - Google Patents

一种pe抗菌食品保鲜膜的制备方法 Download PDF

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CN103613824A
CN103613824A CN201310532864.3A CN201310532864A CN103613824A CN 103613824 A CN103613824 A CN 103613824A CN 201310532864 A CN201310532864 A CN 201310532864A CN 103613824 A CN103613824 A CN 103613824A
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方蕊
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Anhui Vocational and Technical College of Industry and Trade
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract

本发明公开了一种PE抗菌食品保鲜膜的制备方法，包括如下步骤：（1）抗菌母料制粒；（2）吹膜。本发明的制备工艺简单，制备的保鲜膜的颜色稳定性、抗菌性能、物理机械性能以及光老化性能均达到相应标准的要求。

Description

一种PE抗菌食品保鲜膜的制备方法
技术领域
本发明属于化工材料领域，涉及一种PE抗菌食品保鲜膜的制备方法。
背景技术
抗菌塑料是指在塑料中添加一种或者几种特定的抗菌剂，使塑料具有内在抗菌性，是一类具有抑菌和杀菌性能的新型材料，从而在一定的时间内可将沾污在塑料及其制品表面的细菌杀死或抑制其繁殖。与常规的化学和物理消毒方法相比，使用抗菌塑料杀菌具有高效与长效性、既经济又方便。
目前，用于塑料的抗菌剂主要是：有机、无机、天然三大系列。由于无机抗菌剂抗菌时效长，并且耐高温，能够适应塑料加工，被广泛应用于抗菌塑料中。银沸石是目前最常用的塑料用无机抗菌剂，银沸石络合物有很强的抗菌性能，其对大肠杆菌和金黄色葡萄球菌的抑菌效果较好。银沸石络合物在制品中分布均匀，析出速率平缓，抗菌性能好，持续时间长。但是，银离子无机抗菌剂存在的变色问题一直难以解决。
发明内容
本发明所要解决的技术问题是提供一种工艺简单、生产成本低廉的PE抗菌食品保鲜膜的制备方法。
为解决以上技术问题，本发明一种PE抗菌食品保鲜膜的制备方法，包括如下步骤：
（1）、抗菌母料制粒：
取PE树脂80～100份、银离子抗菌剂10～20份、润滑剂5～10份、天然水滑石2～5份、增塑剂5～15份、复合铅盐稳定剂5～15份于双螺杆挤出机中制粒，其中第1～5区的温度分别为125℃、155℃、160℃、170℃、170℃，机头温度为160℃，转速为20～40r/min；
（2）、吹膜：将步骤（1）的抗菌母料颗粒于挤出吹膜机中，挤出造粒温度为125℃、150℃、165℃、160℃，转速为20～40r/min；吹膜温度分别为140℃、160℃、185℃、180℃，转速为30～40r/min。
上述的银离子抗菌剂是以铁酸盐氧化复合物为载体的。
上述的增塑剂为邻苯二甲酸二辛酯或邻苯二甲酸二苯酯。
上述的抗冲击改性剂为甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物、氯化聚乙烯、葵二酸二辛酯中的一种或其混合物。
上述的润滑剂为硬脂酸、氧化聚乙烯蜡、硬脂酸钙、硬脂酸铅和石蜡的一种或两种以上。
与现有技术相比，本发明具有的有益效果为：
本发明利用复合氧化物纳米CuFe2O4作为银的载体来制备抗菌剂，可强效抗菌、抑菌、效果持久，对大肠杆菌和金黄色葡萄球菌的抗菌率可达到90%以上，而且抗菌时间长久。使用本发明抗菌塑料在制备食品保鲜膜时，制备工艺简单，保鲜膜的颜色稳定性、抗菌性能、物理机械性能以及光老化性能均达到相应标准的要求。
具体实施方式
为便于理解本发明，本发明列举实施例如下。本领域技术人员应该明了，所述实施例仅仅用于帮助理解本发明，不应视为对本发明的具体限制。
如无具体说明，本发明的各种原料均可以通过市售得到；或根据本领域的常规方法制备得到。除非另有定义或说明，本文中所使用的所有专业与科学用语与本领域技术熟练入员所熟悉的意义相同。此外任何与所记载内容相似或均等的方法及材料皆可应用于本发明方法中。
除非另有定义或说明，本文中所使用的所有专业与科学用语与本领域技术熟练人员所熟悉的意义相同。此外任何与所记载内容相似或均等的方法及材料皆可应用于本发明方法中。
实施例1
一种PE抗菌食品保鲜膜的制备方法，包括如下步骤：
（1）、抗菌母料制粒：
取抗菌母料各组分于双螺杆挤出机中制粒，其中第1～5区的温度分别为125℃、155℃、160℃、170℃、170℃，机头温度为160℃，转速为20～40r/min；
（2）、吹膜：
将步骤（1）的抗菌母料颗粒于挤出吹膜机中，挤出造粒温度为125℃、150℃、165℃、160℃，转速为20～40r/min；吹膜温度分别为140℃、160℃、185℃、180℃，转速为30～40r/min。
上述抗菌母料各组分的重量份如下：
PE树脂    90份
银离子抗菌剂    15份
润滑剂硬脂酸钙    7份
天然水滑石    3份
增塑剂邻苯二甲酸二辛酯    10份
复合铅盐稳定剂    10份。
其中，银离子抗菌剂是以铁酸盐氧化复合物为载体的。
将本实施例制备的食品保鲜膜，参照FZ/T01021-1992进行抗菌性能测试，结果显示：作用24h对大肠杆菌的抗菌率为90%，对金黄色葡萄球菌的抗菌率为91%。
参照GB/T13022-1991测定拉伸强度和断裂伸长率，结果显示：
纵向拉伸强度为33MPa，横向拉伸强度为31MPa，均高于对照试验中使用的普通PE保鲜膜；纵向断裂伸长率为460%，横向断裂伸长率为600%，均高于对照试验中使用的普通PE保鲜膜。
参照GB/T14522-1993进行光老化试验，结果显示：
经过240h的实验的平均色差为0.94。
实施例2
一种PE抗菌食品保鲜膜的制备方法，包括如下步骤：
（1）、抗菌母料制粒：
取抗菌母料各组分于双螺杆挤出机中制粒，其中第1～5区的温度分别为125℃、155℃、160℃、170℃、170℃，机头温度为160℃，转速为20～40r/min；
（2）、吹膜：
将步骤（1）的抗菌母料颗粒于挤出吹膜机中，挤出造粒温度为125℃、150℃、165℃、160℃，转速为20～40r/min；吹膜温度分别为140℃、160℃、185℃、180℃，转速为30～40r/min。
上述抗菌母料各组分的重量份如下：
PE树脂    100份
银离子抗菌剂    20份
润滑剂硬脂酸钙    10份
天然水滑石    5份
增塑剂邻苯二甲酸二辛酯    15份
复合铅盐稳定剂    15份。
本发明一种食品用抗菌塑料在制备时：将各组分按常规方法高速混合后挤出造粒即可得到母料颗粒；再按常规吹膜工艺即可制成食品保鲜膜。
将本实施例制备的食品保鲜膜，参照FZ/T01021-1992进行抗菌性能测试，结果显示：作用24h对大肠杆菌的抗菌率为90%，对金黄色葡萄球菌的抗菌率为90%。
参照GB/T13022-1991测定拉伸强度和断裂伸长率，结果显示：
纵向拉伸强度为31MPa，横向拉伸强度为30MPa，均高于对照试验中使用的普通PE保鲜膜；纵向断裂伸长率为400%，横向断裂伸长率为480%，均高于对照试验中使用的普通PE保鲜膜。
参照GB/T14522-1993进行光老化试验，结果显示：
经过240h的实验的平均色差为0.99。
实施例3
一种PE抗菌食品保鲜膜的制备方法，包括如下步骤：
（1）、抗菌母料制粒：
取抗菌母料各组分于双螺杆挤出机中制粒，其中第1～5区的温度分别为125℃、155℃、160℃、170℃、170℃，机头温度为160℃，转速为20～40r/min；
（2）、吹膜：
将步骤（1）的抗菌母料颗粒于挤出吹膜机中，挤出造粒温度为125℃、150℃、165℃、160℃，转速为20～40r/min；吹膜温度分别为140℃、160℃、185℃、180℃，转速为30～40r/min。
上述抗菌母料各组分的重量份如下：
PE树脂    80份
银离子抗菌剂    10份
润滑剂硬脂酸钙    5份
天然水滑石    2份
增塑剂邻苯二甲酸二辛酯    5份
复合铅盐稳定剂    5份。
本发明一种食品用抗菌塑料在制备时：将各组分按常规方法高速混合后挤出造粒即可得到母料颗粒；再按常规吹膜工艺即可制成食品保鲜膜。
将本实施例制备的食品保鲜膜，参照FZ/T01021-1992进行抗菌性能测试，结果显示：作用24h对大肠杆菌的抗菌率为90%，对金黄色葡萄球菌的抗菌率为91%。
参照GB/T13022-1991测定拉伸强度和断裂伸长率，结果显示：
纵向拉伸强度为33MPa，横向拉伸强度为30MPa，均高于对照试验中使用的普通PE保鲜膜；纵向断裂伸长率为460%，横向断裂伸长率为580%，均高于对照试验中使用的普通PE保鲜膜。
参照GB/T14522-1993进行光老化试验，结果显示：
经过240h的实验的平均色差为0.91。
申请人声明，所属技术领域的技术人员在上述实施例的基础上，将上述实施例某组分的具体含量点值，与发明内容部分的技术方案相组合，从而产生的新的数值范围，也是本发明的记载范围之一，本申请为使说明书简明，不再罗列这些数值范围。

Claims (5)

1.一种PE抗菌食品保鲜膜的制备方法，其特征在于包括如下步骤：
（1）、抗菌母料制粒：
取PE树脂80～100份、银离子抗菌剂10～20份、润滑剂5～10份、天然水滑石2～5份、增塑剂5～15份、复合铅盐稳定剂5～15份，加于双螺杆挤出机中制粒，其中第1～5区的温度分别为125℃、155℃、160℃、170℃、170℃，机头温度为160℃，转速为20～40r/min；
（2）、吹膜：将步骤（1）的抗菌母料颗粒于挤出吹膜机中，挤出造粒温度为125℃、150℃、165℃、160℃，转速为20～40r/min；吹膜温度分别为140℃、160℃、185℃、180℃，转速为30～40r/min。
2.如权利要求1所述的一种PE抗菌食品保鲜膜的制备方法，其特征在于：所述的银离子抗菌剂是以铁酸盐氧化复合物为载体的。
3.如权利要求1所述的一种PE抗菌食品保鲜膜的制备方法，其特征在于：所述的增塑剂为邻苯二甲酸二辛酯或邻苯二甲酸二苯酯。
4.如权利要求1所述的一种PE抗菌食品保鲜膜的制备方法，其特征在于：所述的抗冲击改性剂为甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物、氯化聚乙烯、葵二酸二辛酯中的一种或其混合物。
5.如权利要求1所述的一种PE抗菌食品保鲜膜的制备方法，其特征在于：所述的润滑剂为硬脂酸、氧化聚乙烯蜡、硬脂酸钙、硬脂酸铅和石蜡的一种或两种以上。
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CN106319025A (zh) * 2015-06-23 2017-01-11 大连瑞贤达塑胶有限公司 Pe防霉保鲜膜
CN112590342A (zh) * 2020-12-14 2021-04-02 台州市路桥瑞康家庭用品厂 一种抗菌保鲜膜及其制备工艺

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CN103865150A (zh) * 2014-03-13 2014-06-18 苏州科茂电子材料科技有限公司 一种具有防霉功效的外皮的制备方法
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CN112590342A (zh) * 2020-12-14 2021-04-02 台州市路桥瑞康家庭用品厂 一种抗菌保鲜膜及其制备工艺
CN112590342B (zh) * 2020-12-14 2022-03-08 台州市路桥瑞康家庭用品厂 一种抗菌保鲜膜及其制备工艺

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