Injection molded PVA Sponge

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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Details

521 65, 5211091, 521141, C08J 930

Patent

active

055546587

ABSTRACT:
A molded porous polyvinyl alcohol sponge includes an outer skin capable of absorbing and passing water to interior portions of the sponge, and is substantially smooth except for predetermined structural details imparted by the mold used in its making. The outer skin has smaller average pore size than does the interior portion of the product.

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