초록 ▼

Ionomer present in a polyethylene resin from about 1 to 40% by weight of the resin produces superior extruded foam sheet products that approach the pore size and resiliency of foams prepared from chemical blowing agents. The results can be achieved at normal extrusion rates and on standard extrusion

Ionomer present in a polyethylene resin from about 1 to 40% by weight of the resin produces superior extruded foam sheet products that approach the pore size and resiliency of foams prepared from chemical blowing agents. The results can be achieved at normal extrusion rates and on standard extrusion foaming equipment. Tear strength is improved so that collapsible foam packaging products can be produced in which the foam body is cut through except for a surface thereof that remains intact to provide a hinge or joint about which the cut foam bodies can be pivoted.

대표청구항 ▼

1. An extruded foam sheet product having first and second skin surfaces defining a core thickness dimension therebetween and wherein said product is, cut through said first surface and said core without cutting through said second surface thereby defining at least one leaf connected to said core by

1. An extruded foam sheet product having first and second skin surfaces defining a core thickness dimension therebetween and wherein said product is, cut through said first surface and said core without cutting through said second surface thereby defining at least one leaf connected to said core by a joint defined by said second surface about which said leaf pivots, said skin surfaces and said core comprising a homogeneous admixture of about 70% by weight low density polyethylene, 5% by weight ionomer, and 25% by weight metallocene-catalyzed ethylene/alpha-olefin copolymer.