PROCESSING OF SPONGE

PURPOSE:To obtain a sponge which can be easily reconstituted with water from dry and hard state to wet and soft state, by attaching a specific polyvinyl alcohol to a sponge composed of a polyvinyl acetal resin using a specific method. CONSTITUTION:An aqueous solution of a polyvinyl alcohol having an...

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Bibliographische Detailangaben
Hauptverfasser:	FUJISHIRO HISAKO, MURAYAMA OSAMU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a sponge which can be easily reconstituted with water from dry and hard state to wet and soft state, by attaching a specific polyvinyl alcohol to a sponge composed of a polyvinyl acetal resin using a specific method. CONSTITUTION:An aqueous solution of a polyvinyl alcohol having an average polymerization degree of >=1,700 and a saponification degree of >=98.5mol% is applied to a sponge composed of a polyvinyl acetal resin, dried and heat-set at 120-130 deg.C. The polyvinyl alcohol is insolubilized to water and attached to the sponge at a ratio of