CN107383571A - 环保抗皱收缩包装膜 - Google Patents
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Abstract
本发明公开了一种环保抗皱收缩包装膜,由下述重量份的原料制备而成:LLDPE 305‑395份、热塑性淀粉85‑115份、甲基丙烯酸甲酯‑丁二烯‑苯乙烯三元共聚物2‑4份、甲基丙烯酸甲酯0.2‑0.9份、柠檬酸三丁酯0.6‑1.4份、季戊四醇硬脂酸酯2‑4份、稳定剂0.3‑1.8份、抗菌剂0.2‑0.9份。本发明环保抗皱收缩包装膜,具有优良的化学稳定性、热封性、耐水性和防潮性,机械强度、气密性较好,透明度和光泽度较高;还具有优异的抗菌性,可广泛应用在食品和医药等领域的无菌包装方面。
Description
技术领域
本发明涉及一种包装膜,尤其涉及一种环保抗皱收缩包装膜。
背景技术
塑料包装材料包括从石油等矿物质中提取的石油基塑料和通过天然植物纤维、生物高分子材料提取并加工的生物可降解塑料。主要制成袋、瓶、箱、盒、拉伸膜、热收缩薄膜、真空包装容器、吸塑包装容器、泡罩包装容器、贴体包装容器、气垫式缓冲包装容器、泡沫塑料容器和泡沫塑料缓冲材料等产品。随着食品和医药对包装的要求越来越严格,各种用途的塑料薄膜也有了飞速的发展,一些新的功能薄膜也脱颖而出,环保抗皱收缩包装膜已成为塑料包装材料的重要发展方向之一。
本发明提供了一种环保抗皱收缩包装膜,稳定性、防潮性、透明性能优异,能在食品和医药等领域的包装方面得到广泛应用。
发明内容
本发明目的是通过如下技术方案实现的:
一种环保抗皱收缩包装膜,由下述重量份的原料制备而成:
LLDPE 305-395份、热塑性淀粉85-115份、甲基丙烯酸甲酯-丁二烯-苯乙烯三元共聚物2-4份、甲基丙烯酸甲酯0.2-0.9份、柠檬酸三丁酯0.6-1.4份、季戊四醇硬脂酸酯2-4份、稳定剂0.3-1.8份、抗菌剂0.2-0.9份。
优选地,所述的稳定剂为油酸锌、月桂酸锌、硬脂酸锌中一种或多种的混合物。
更优选地,所述的稳定剂由油酸锌、月桂酸锌、硬脂酸锌混合而成,所述油酸锌、月桂酸锌、硬脂酸锌的质量比为(1-3):(1-3):(1-3)。
优选地,所述的抗菌剂为硅酸镁、草酸铝、钨酸铜中一种或多种的混合物。
更优选地,所述的抗菌剂由硅酸镁、草酸铝、钨酸铜混合而成,所述硅酸镁、草酸铝、钨酸铜的质量比为(1-3):(1-3):(1-3)。
本发明所述一种环保抗皱收缩包装膜,具有优良的化学稳定性、热封性、耐水性和防潮性,机械强度、气密性较好,透明度和光泽度较高。还具有优异的抗菌性,可广泛应用在食品和医药等领域的无菌包装方面。
具体实施方式
下面结合实施例对本发明做进一步的说明,以下所述,仅是对本发明的较佳实施例而已,并非对本发明做其他形式的限制,任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更为同等变化的等效实施例。凡是未脱离本发明方案内容,依据本发明的技术实质对以下实施例所做的任何简单修改或等同变化,均落在本发明的保护范围内。
实施例中各原料介绍:
LLDPE,采用中国石油天然气股份有限公司广州分公司提供的牌号为DFDA-7042的LLDPE。
甲基丙烯酸甲酯-丁二烯-苯乙烯三元共聚物,采用日本电气化学公司提供的牌号为TH-21的甲基丙烯酸甲酯-丁二烯-苯乙烯三元共聚物。
甲基丙烯酸甲酯,CAS号:80-62-6,具体采用山东鲁科化工集团有限公司提供的型号为BT/682-2001的甲基丙烯酸甲酯。
柠檬酸三丁酯,CAS号:77-94-1。
季戊四醇硬脂酸酯,CAS号:115-83-3。
热塑性淀粉,采用专利申请号:200710041319.9中实施例1的方法制备,其反应原料的重量份为:脂化淀粉80份,山梨糖醇20份、松香甘油脂3份、水25份,所述脂化淀粉水份的含量为13wt%。
月桂酸锌,CAS号:2452-01-9。
硬脂酸锌,CAS号:557-05-1。
油酸锌,CAS号:557-07-3。
草酸铝,CAS号:814-87-9,粒径5μm。
钨酸铜,CAS号:13587-35-4,粒径5μm。
硅酸镁,CAS号:1343-88-0,粒径5μm。
实施例1
环保抗皱收缩包装膜原料(重量份):LLDPE 355份、热塑性淀粉105份、甲基丙烯酸甲酯-丁二烯-苯乙烯三元共聚物3份、甲基丙烯酸甲酯0.5份、柠檬酸三丁酯1.1份、季戊四醇硬脂酸酯3份、稳定剂0.9份、抗菌剂0.3份。
所述的稳定剂为油酸锌、月桂酸锌、硬脂酸锌按质量比为1:1:1搅拌混合均匀得到。
所述的抗菌剂由硅酸镁、草酸铝、钨酸铜按质量比为1:1:1搅拌混合均匀得到。
制备上述环保抗皱收缩包装膜的方法,包括下列步骤:
(1)将LLDPE、热塑性淀粉、甲基丙烯酸甲酯-丁二烯-苯乙烯三元共聚物、甲基丙烯酸甲酯、柠檬酸三丁酯、季戊四醇硬脂酸酯、稳定剂、抗菌剂加入混合搅拌机中,以转速为500转/分,搅拌混合均匀15min,得到混合料;
(2)将步骤(1)的混合料进行挤压造粒,挤压方式为双螺杆挤压,挤压时温度为5个阶段:第一阶段温度为170℃,第二阶段温度为185℃,第三阶段温度为195℃,第四阶段温度为215℃,第五阶段温度为210℃,挤压后造粒,得到母粒;
(3)将造粒得到的母粒用吹膜机塑化后挤压,塑化后挤压时送料温度为110℃,压缩塑化温度为130℃,机头温度为180℃;
(4)将步骤(3)得到的材料进行牵引成为薄膜,吹胀比为1:4,牵引比为1:6;
(5)牵引后冷却至室温。得到实施例1的环保抗皱收缩包装膜。
实施例2
与实施例1基本相同,区别仅仅在于:所述的稳定剂由月桂酸锌、硬脂酸锌按质量比为1:1搅拌混合均匀得到。得到实施例2的环保抗皱收缩包装膜。
实施例3
与实施例1基本相同,区别仅仅在于:所述的稳定剂由油酸锌、硬脂酸锌按质量比为1:1搅拌混合均匀得到。得到实施例3的环保抗皱收缩包装膜。
实施例4
与实施例1基本相同,区别仅仅在于:所述的稳定剂由油酸锌、月桂酸锌按质量比为1:1搅拌混合均匀得到。得到实施例4的环保抗皱收缩包装膜。
实施例5
与实施例1基本相同,区别仅仅在于:所述的抗菌剂由草酸铝、钨酸铜按质量比为1:1搅拌混合均匀得到。得到实施例5的环保抗皱收缩包装膜。
实施例6
与实施例1基本相同,区别仅仅在于:所述的抗菌剂由硅酸镁、钨酸铜按质量比为1:1搅拌混合均匀得到。得到实施例6的环保抗皱收缩包装膜。
实施例7
与实施例1基本相同,区别仅仅在于:所述的抗菌剂由硅酸镁、草酸铝按质量比为1:1搅拌混合均匀得到。得到实施例7的环保抗皱收缩包装膜。
测试例1
对实施例1-7中步骤(2)制备得到的母粒的常规性能进行测试,具体测试结果见表1。
表1:常规性能测试数据表
比较实施例1与实施例2-4,实施例1(油酸锌、月桂酸锌、硬脂酸锌复配)常规性能明显优于实施例2-4(油酸锌、月桂酸锌、硬脂酸锌中任意二者复配);比较实施例1与实施例5-7,实施例1(硅酸镁、草酸铝、钨酸铜复配)常规性能明显优于实施例5-7(硅酸镁、草酸铝、钨酸铜中任意二者复配)。
测试例2
对实施例1-7的环保抗皱收缩包装膜的抗菌性能进行测试,参照GB/T21510-2008检测,大肠杆菌ATYCC 25922、金黄色葡萄球菌ATCC 6538。具体测试结果见表2。
表2:抗菌性能测试数据表
样品 | 大肠杆菌杀菌率,% | 金黄色葡萄球菌杀菌率,% |
实施例1 | 99.9 | 99.9 |
实施例2 | 93.3 | 93.0 |
实施例3 | 92.0 | 94.9 |
实施例4 | 94.1 | 92.7 |
实施例5 | 90.7 | 91.1 |
实施例6 | 85.2 | 87.9 |
实施例7 | 89.6 | 85.5 |
比较实施例1与实施例2-4,实施例1(油酸锌、月桂酸锌、硬脂酸锌复配)抗菌性能明显优于实施例2-4(油酸锌、月桂酸锌、硬脂酸锌中任意二者复配);比较实施例1与实施例5-7,实施例1(硅酸镁、草酸铝、钨酸铜复配)抗菌性能明显优于实施例5-7(硅酸镁、草酸铝、钨酸铜中任意二者复配)。
Claims (1)
1.一种环保抗皱收缩包装膜,其特征在于,由下述重量份的原料制备而成:LLDPE 305-395份、热塑性淀粉85-115份、甲基丙烯酸甲酯-丁二烯-苯乙烯三元共聚物2-4份、甲基丙烯酸甲酯0.2-0.9份、柠檬酸三丁酯0.6-1.4份、季戊四醇硬脂酸酯2-4份、稳定剂0.3-1.8份、抗菌剂0.2-0.9份;
所述的稳定剂由油酸锌、月桂酸锌、硬脂酸锌混合而成,所述油酸锌、月桂酸锌、硬脂酸锌的质量比为(1-3):(1-3):(1-3);
所述的抗菌剂由硅酸镁、草酸铝、钨酸铜混合而成,所述硅酸镁、草酸铝、钨酸铜的质量比为(1-3):(1-3):(1-3)。
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CN107955250A (zh) * | 2017-12-01 | 2018-04-24 | 东莞俏美肌生物科技有限公司 | Pe液体包装膜及其制备方法 |
CN108129741A (zh) * | 2017-12-01 | 2018-06-08 | 东莞俏美肌生物科技有限公司 | 环保抗皱收缩包装膜 |
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