COMPOSITION FOR MOLDING THIN-WALLED PARTS, AND INJECTION-MOLDED SQUEEZE TUBE MADE THEREOF

摘要

Compositions for injection-molding of long, thin-walled, one-piece squee ze tubes include low-density polyethylene having a density less than about 0.92 5 g/cc and a melt index of at least about 50 g/10 minutes, and polypropylene having a high melt index greater than about 800 g/10 minutes, wherein the high melt index is attained by peroxide degradation of the polypropylene during melt processing. The compositions can also include a polymer that is miscible and compatible with low-density polyethylene and polypropylene for enhancing flow of the molding composition in the mold, the polymer having a glass transition temperature T g of about -20 to -40.degree.C, and/or a metallocene resin having a density less than about 0.915 g/cc.