CN108384088A - 一种热收缩膜及其制备方法 - Google Patents

一种热收缩膜及其制备方法 Download PDF

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CN108384088A
CN108384088A CN201810093203.8A CN201810093203A CN108384088A CN 108384088 A CN108384088 A CN 108384088A CN 201810093203 A CN201810093203 A CN 201810093203A CN 108384088 A CN108384088 A CN 108384088A
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heat shrink
shrink films
preparation
density polyethylene
ethylene
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何燕珍
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Foshan City Yi Sun Technology Services Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/015—Additives for heat shrinkable compositions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/06—Biodegradable
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract

本发明公开一种热收缩膜，包括以下重量份的原料：线性低密度聚乙烯15～30、高密度聚乙烯20～35、乙烯‑辛烯共聚物20～30，聚癸二酸甘油酯20～30、对苯二甲二辛酯0.5～1.5、硬脂酸镁0.2～0.6、乙撑双硬脂酸酰胺0.2～0.5。本发明的热收缩膜具有良好的耐穿刺性能、透明度和表面光泽度，同时，材料易降解，可减少对环境的污染；本发明的制备方法简单，易规模化生产。

Description

一种热收缩膜及其制备方法
技术领域
本发明涉及包装材料领域，具体涉及一种热收缩膜及其制备方法。
背景技术
聚乙烯(PE)热收缩膜由于其良好的综合性能，在包装行业的需求和应用越来越多。然而，目前PE热收缩膜仍然存在一些问题，强度较低，容易造成破裂，并且透明度和光泽度较差，同时，材料不容易生物降解，对环境造成污染。比如中国专利CN106009184A和CN10215555A均公开报道了具有良好力学性能的PE热收缩膜，但是薄膜的透明度和光泽度较差，并且不易降解，造成环境污染。因此，为了进一步拓宽PE热收缩膜在包装行业的应用范围，提供一种综合性能良好的PE热收缩膜及其制备方法是具有重要意义的。
发明内容
针对现有技术的不足，本发明提供一种热收缩膜及其制备方法，赋予收缩膜良好的耐穿刺性能和良好的透明性和表面光泽度。
为实现上述目的，本发明采用的技术方案如下：
一种热收缩膜及其制备方法，其特征在于，本发明的热收缩膜是由以下重量份的原料组成：线性低密度聚乙烯15～30、高密度聚乙烯20～35、乙烯-辛烯共聚物20～30，聚癸二酸甘油酯20～30、对苯二甲二辛酯0.5～1.5、硬脂酸镁0.2～0.6、乙撑双硬脂酸酰胺0.2～0.5。
所述的热收缩膜中还加入0.1～0.8重量份的其他助剂，所述其他助剂包括抗氧剂、光稳定剂、防老剂。
所述的热收缩膜的制备方法包括下列步骤：首先将低密度聚乙烯、高密度聚乙烯、乙烯-辛烯共聚物、聚癸二酸甘油酯及其他剩余助剂均匀混合、熔融、挤出造粒；其次将粒料在吹膜成型机上吹塑成型，即得热收缩膜。
所述的热收缩膜的吹塑成型条件为：成型温度175～210℃，吹涨比为3～5:1。
与现有技术相比，本发明的有益效果是：
(1)本发明通过在聚乙烯体系中引入乙烯-辛烯共聚物，在赋予和保证收缩膜透明度和表面光泽度，能够有效改善产品的耐穿刺性能和抗撕裂性能。
(2)本发明通过引入聚癸二酸甘油酯，不仅能够改善材料的机械性能，同时，其能够完全生物降解，节能环保，减少环境污染。
(3)本发明的制备工艺简单易行，能够实现规模化生产。
具体实施方式
下面将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。
按照下表1各实施例的配方称取各原料(重量份)，挤出造粒和吹塑成型，得到热收缩膜。
表1各实施例和对比例中热收缩膜的原料重量份
编号 实施例1 实施例2 实施例3 对比例1
线性低密度聚乙烯 20 25 30 25
高密度聚乙烯 30 32.5 35 32.5
乙烯-辛烯共聚物 6 10 14 ---
聚癸二酸甘油酯 30 25 20 25
对苯二甲酸二辛酯 1 1.5 2 1.5
硬脂酸镁 0.2 0.3 0.4 0.3
乙撑双硬脂酸酰胺 0.2 0.2 0.3 0.2
对各实施例和对比例所制备的热收缩膜进行性能测试，结果详见表2。其中，采用GB/T 1040-1992对产品的力学性能进行测试；采用GB/T 9639-1988对产品的冲击破损质量进行测试。
表2各实施例和对比例制备的热收缩膜的性能
由表2可知，相对于对比例1，由实施例1-3所制备的PE热收缩膜具有更高的拉伸强度、扯断伸长率和单位冲击破损质量。由此说明通过引入适量的乙烯-辛烯共聚物能够显著的增韧作用，并有效改善薄膜的透明度和光泽度。

Claims (4)

1.一种热收缩膜及其制备方法，其特征在于，本发明的热收缩膜是由以下重量份的原料组成：线性低密度聚乙烯15～30、高密度聚乙烯20～35、乙烯-辛烯共聚物20～30，聚癸二酸甘油酯20～30、对苯二甲二辛酯0.5～1.5、硬脂酸镁0.2～0.6、乙撑双硬脂酸酰胺0.2～0.5。
2.如权利要求1所述的一种热收缩膜及其制备方法，其特征在于：所述的热收缩膜中还加入0.1～0.8重量份的其他助剂，所述其他助剂包括抗氧剂、光稳定剂、防老剂。
3.如权利要求1所述的一种热收缩膜及其制备方法，其特征在于：所述的一种热收缩膜，其制备方法包括下列步骤：首先将线性低密度聚乙烯、高密度聚乙烯、乙烯-辛烯共聚物、聚癸二酸甘油酯及其他剩余助剂均匀混合、熔融、挤出造粒；其次将粒料在吹膜成型机上吹塑成型，即得热收缩膜。
4.如权利要求3所述的一种热收缩膜及其制备方法，其特征在于：所述的一种热收缩膜的吹塑成型条件为：成型温度175～210℃，吹涨比为3～5:1。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114774008A (zh) * 2022-06-17 2022-07-22 宁波长阳科技股份有限公司 一种高低密度poe共挤封装胶膜及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103804749A (zh) * 2013-12-11 2014-05-21 常熟市希诺包装制品有限公司 高透明度聚烯烃热收缩膜的生产方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103804749A (zh) * 2013-12-11 2014-05-21 常熟市希诺包装制品有限公司 高透明度聚烯烃热收缩膜的生产方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114774008A (zh) * 2022-06-17 2022-07-22 宁波长阳科技股份有限公司 一种高低密度poe共挤封装胶膜及其制备方法
CN114774008B (zh) * 2022-06-17 2022-09-13 宁波长阳科技股份有限公司 一种高低密度poe共挤封装胶膜及其制备方法

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