论文部分内容阅读
BOPS片材是80年代初在世界发达国家中兴起的一颗塑料包装明珠,它与传统的PVC、烯烃类以及其他材料相比,具有许多独特的优点,主要表现在:1.具有良好的强度,刚度和耐拉性,有良好的加工性能,热成型非常容易;2.制品的光洁度,透明度比PVC好,比重比PVC小23％,用料省,价格适中;3.化学稳定性好,无毒无味,不改变食物味道,保鲜保味好,对水气有适宜的渗透率;4.制品的耐温性好,在-35℃至80℃范围内不变形,对温度变化也不敏感;5.印刷、装潢、镀金、复合均可,热封方便可靠;6.利于环境保护,既可全部循环使用,在使用回收焚化过程中又不产生有毒物质。
BOPS sheet is a plastic packaging pearl that has emerged in developed countries in the world in the early 1980s. Compared with traditional PVC, olefins and other materials, BOPS sheet has many unique advantages, mainly manifested in: 1. Good strength , Stiffness and resistance to pull, has good processing performance, thermoforming is very easy; 2. Product finish, transparency is better than PVC, the specific gravity is 23% smaller than PVC, the use of materials, the price is moderate; 3. The chemical stability is good, Non-toxic and odorless, does not change the taste of food, keep fresh and taste good, have suitable permeability to water vapor; 4. The product has good temperature resistance, does not deform in the range of -35°C to 80°C, and is not sensitive to temperature change 5. Printing, decorating, gilding, and compounding are all available; heat sealing is convenient and reliable; 6. It is beneficial to environmental protection, and can be used in full recycling. No toxic substances are produced in the process of recycling and incineration.