发泡聚乙烯醇缓冲特性研究  

Research on Cushioning Characteristics of Expanded Polyvinyl Alcohol

作　　者：王冬梅[1] 李云[1] 柏子游[1] 

机构地区：[1]深圳职业技术学院,深圳518055

出　　处：《包装工程》2012年第7期1-3,共3页Packaging Engineering

基　　金：国家自然科学基金(50905120);广东省自然科学基金(S2011010001073);广东省高等学校高层次人才项目

摘　　要：开展了干态发泡聚乙烯醇(PVOH)平面及轴向压缩试验、SEM试验和饱和吸水后的发泡PVOH的静态压缩试验研究。结果表明:发泡PVOH的缓冲性能因其加工方向不同而略有不同,发泡PVOH的轴向承载性能略高于其平面承载性能;干态发泡PVOH压缩后基本不具有回弹性,压缩后泡孔孔壁弯曲,泡孔减小,泡沫变得密实,其压缩应力-应变曲线呈线弹性区、平台区和密实化区;饱和吸水后的发泡聚乙烯醇承载性能明显减弱,压缩回弹性增强。因此,发泡PVOH适合于易于污染环境的液态药品或危险品的缓冲外包装,当液体产品的内包装破损后,发泡PVOH可迅速吸收液体以防泄漏,可以起到缓冲的效果。Flat compression and vertical compression tests of dry expanded PVOH, scanning electron microsco- py （SEM） inspections, and static compression tests of expanded PVOH after fully absorbing water were carried out. The results showed that the cushioning performances of expanded PVOH differ slightly in different direc- tions; its vertical compression characteristics are better than flat compression characteristics; dry expanded PVOH basically loses its resilience after being compressed; the walls of pores of expanded PVOH are bent after compression; the pores shrink and turn much more dense; its compressive stress-strain curve includes linear e- lastic zone, plateau zone and dense zone; compression performance of fully-water-absorbed expanded PVOH weaken significantly and its resilience improves. Therefore, expanded PVOH is suitable for cushioning package of environmental-harmful liquid medicine or dangerous goods. In case of leakage from inner package, expanded PVOH can absorb the liquid quickly, prevent package from liquid leakage and shows cushioning effect.

关 键 词：发泡聚乙烯醇 静态压缩 吸水 SEM图 

分 类 号：TB484.3[一般工业技术—包装工程] TB487