Polymer compositions for injection stretch blow molded articles

摘要

A polymer composition of polypropylene copolymer and 1 to 50% by weight of hard resin. The polypropylene copolymer is either an impact copolymer or a random copolymer. The polymer composition can be used to make injection stretch blow molded articles having improved top load strength.

主权项

1. An injection stretch blow molded (ISBM) article comprising:
a polymeric composition comprising a polypropylene impact copolymer including a matrix phase and a rubbery phase dispersed within the matrix phase; and, from 1 to 50 weight percent of a hard resin, wherein the hard resin has a softening point, as measured according ASTM E-28, of from 60° C. to 180° C. and a melt flow rate (MFR) of from 1 to 50 g/10 min at 230° C. and a load of 2.16 kg, and wherein the ISBM article exhibits a top load strength of from 103 to 160 N, a normalized top load strength of from 5.0 to 10.0 N/g, a haze of from 60 to 80%, and a gloss at 45° of from 5 to 15 , and wherein the ISBM article is opaque or semi-opaque.