摘要
目的提升流延聚丙烯（CPP）包装膜整体性能，改善CPP膜使用的性能缺陷。方法 利用低熔点聚烯烃弹性体（POE）材料与三元共聚聚丙烯（PP）共混作为热封层，通过纳米二氧化硅（Si02）增大挺度，并添加适量的滑剂解决薄膜发黏的问题，采用三层共挤流延法制备气调保鲜用CPP薄膜。结果在热封层中添加14份POE-A4085S、4份纳米SiO2和1．5份爽滑剂，控制熔体温度为240-250℃，冷却辊温度为24 ℃，利用三层共挤制备出始封温度低于102℃，落镖冲击质量为289 g，拉伸模量仅下降4．44％的高性能气调保鲜用CPP薄膜。结论POE／纳米SiO2体系与三元共聚PP相容性好，增韧效果明显，挺度不下降。
Objective To enhance the overall performance of casting polypropylene （CPP） film, and improve the perform ance deficiencies of CPP film. Methods Blending polyolefin elastomer （POE） and nano-SiO2 with polypropylene terpolymer as low-temperature heat-sealing layer, CPP film for modified atmosphere packaging（MAP） was prepared via three-layer co-ex- trusion casting technology. Results It showed that the properties of the films obtained met the requirements, their heat-sealing initial temperature was below 102 ℃, their dart impact strength reached 289 g, and their tensile modulus was reduced by only 4.44%, while the heat-sealing layer was composed of polypropylene terpolymer blended with 14 phr POE-A4085S, 4.0 phr nano-SiO2, and 1.5 phr slip additives, the melting temperature was controlled between 240 - 250 ℃ and the chill roll temperature was 24 ℃. Conclusion POE/nano-SiO2 system blended well with polypropylene terpolymer, and the resulting CPP film had good dart impact strength and tensile modulus.
出处
《包装工程》
CAS
CSCD
北大核心
2014年第9期1-5,共5页
Packaging Engineering
基金
天津市滨海新区科技计划项目(2011-XJR14011)
福建师范大学福清分校科研项目(KY2012027)
福州市科技计划项目(2012-G-135)
关键词
POE
纳米二氧化硅
聚丙烯流延膜
气调包装
改性
POE
nano-SiO2
casting polypropylene film
modified atmosphere packaging
modification
