Structure and properties of cryogenic impact resistant copolymerized polypropylene for refrigerator
The properties of cryogenic impact resistant copolymerized polypropylene K6810 for refrigerator made via gas phase method were observed and compared with similar imported products.The results show the high mechanical strength and excellent impact resistance at low temperature of K6810 makes it suitable for cryogenic product.The reasonably contrlled contents of ethylene and rubber phase in K6810,the high proportion of ethylene and propylene in rubber phase forming alternating copolymerization or small block random sequence structure and excellent quality of rubber phase improve the impact strength of K6810 effectively.K6810 has smaller volume deformation and better dimensional stability in the process of melt filling,and its rheological property is close to that of imported samples,therefore it's not necessary to adjust the process during injection molding.
polypropylenelow temperature resistanceimpact resistancesequence structureinjection molding
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