| 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( SiO2) 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-A4085 S、4 份纳米 SiO2 和 1 . 5 份爽滑剂,控制熔体温度为 240 ~ 250益 ,冷却辊温度为 24 益 ,利用三层共挤制备出始封温度低于 102 益 ,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。 |
| 关键词: POE 纳米二氧化硅 聚丙烯流延膜 气调包装 改性 |
| DOI： |
| 分类号:TQ325.1+4 |
| 基金项目: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) |
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| Development of CPP Film Blended with POE and Nano-SiO2for MAP |
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LIN Yuan-zhi1, SU Yu-hang1, LIU Xiang2, LU Ji-bing2
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1.Fuqing Branch of Fujian Normal University, Fuqing 350300, China;2.Tianjin HuaHeng Packaging Materials Co. , Ltd. , Tianjin 300270, China
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| Abstract: |
| Objective To enhance the overall performance of casting polypropylene ( CPP) film, and improve the performance deficiencies of CPP film. Methods Blending polyolefin elastomer ( POE) and nano-SiO2with polypropylene terpolymer as low-temperature heat-sealing layer, CPP film for modified atmosphere packaging( MAP) was prepared via three-layer co-extrusion casting technology. Results It showed that the properties of the films obtained met the requirements, their heat-sealing initial temperature was below 102 益 , 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 益 and the chill roll temperature was 24 益 . Conclusion POE / nano-SiO2system blended well with polypropylene terpolymer, and the resulting CPP film had good dart impact strength and tensile modulus. |
| Key words: POE nano-SiO2 casting polypropylene film modified atmosphere packaging modification |
