聚丙烯香味塑料包装薄膜研究

对聚丙烯薄膜加香方法进行了研究,采用市售聚丙烯薄膜和香精为原料,利用香精分子的扩散运动和气体挥发作用,以及塑料包装薄膜的热胀冷缩性能,使香精分子融入塑料包装薄膜分子的间隙中,得到聚丙烯香味塑料包装薄膜。探讨了香精添加量对聚丙烯薄膜力学性能和透光率的影响,并分析了加热温度和加热时间对薄膜香味持久性的影响,估测了所制备薄膜的香味维持时间。结果表明:香精添加量较少时,其对聚丙烯薄膜力学性能和透光率的影响甚微;但加热温度和加热时间对薄膜香味持久性影响较大,理想的加热温度和加热时间分别为100℃和1h,此条件下聚丙烯加香薄膜的香味至少可以维持1a的时间。

The Research of Polypropylene Fragrance Plastic Packaging Film

The method of adding fragrance into polypropylene film was studied.With commercially available polypropylene films and flavor as raw materials,using fragrance molecular diffusion and volatilization with the property of expansion with heat and contract with cold of plastic packaging film,the flavor molecules diffuse into interspace of plastic packaging film.By this way,fragrance polypropylene packaging film was got.The effect of the flavor content on the mechanical properties of polypropylene film and transmittance were discussed.The influence of heating temperature and time on the film fragrance were analyzed,the fragrance maintenance time of the film was estimated.The results showed that it had little influence on the mechanical properties and transmittance of polypropylene film when a little flavor was added;the heating temperature and heating time have a greater effect on the persistence of the flavor of the film.The ideal heating temperature and time were at 100 ℃ and 1h.Under these conditions,the fragrance of polypropylene flavored films can last for one year at least.