Low density polymeric foam using a three-polymer blend

Details Low density polymeric foam using a three-polymer blend Low density polymeric foam using a three-polymer blend

2007-06-05

2007-06-05

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S139000, C521S147000, C525S098000, C525S191000, C525S240000

Reexamination Certificate

active

10880973

ABSTRACT:
A polymeric composition to be used in producing low density foam in which the polymeric composition comprises high density polyethylene, alkenyl aromatic polymer and a linear low density polyethylene. The polymeric resins may be prime virgin resin, offgrade virgin resin, recycled resin from a post industrial source, recycled resin from a post consumer source, or blends thereof Inventive compositions for producing polymeric foam are characterized by Dynamic Mechanical Spectroscopy to have a complex viscosity (η*) in the range of 6.0×104to 2.5×105poise and a loss tangent (tan δ) in the range of 0.7 to 2.1 at 190° C. and a power-law relation between tan δ and η* where the exponent is within the range between −0.70 and −0.30 for the temperature range of 190° to 230° C.

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