Method for extracting residue from a sponge material and method

Details Method for extracting residue from a sponge material and method Method for extracting residue from a sponge material and method

1998-06-11

2000-08-15

Alexander, Lyle A.

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 2, 134 221, 134 2211, 134 2213, 134 2217, 134 26, 134 941, 134 951, 1341001, 1341032, B08B 304

Patent

active

06103018&

ABSTRACT:
An industrial sponge device and a method of manufacturing the same. The sponge is made from a polyvinyl acetal material with a process in which the pores are formed by gas to provide an open pore structure having no fibrils. Additionally, the sponge is purified by an extracting process which includes alternating exposure of the partially cross-linked sponge to acid and oxidizing solutions. The sponge is sterilized by electron beam radiation to destroy micro organisms that can cause contamination of the final product. The resulting sponge material is formed into an industrial sponge having a cylindrical body and a plurality of projections extending from the body. The projections are tapered truncated cones having a cross-sectional radius that decreases with distance from the body. The extracting process permits residual amounts of calcium, zinc, and other elements to be 2 ppm or less; preferably 1 ppm or less.

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