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AssigneeInoac Corporation
InventorsYukishiro Kosaka, Genjiro Hattori, Hidero Suzuki, Satoshi Kondo, Masahiro Fukuyama, Atsushi Ichinose
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A melamine molded foam is produced by heat-compressing a melamine foam to a thickness of {fraction (1/1.2)} to {fraction (1/12)} to cause plastic deformation and temporarily fixing the shape; the heat-compression is performed under the conditions of from 210 to 350° C. for 3 minutes or longer; the heat-compression is preferably performed at a temperature within the range of lower than the decomposition temperature of the melamine monomer by 140° C. or less; in some of such molded foams, the shape recovery in the direction of thickness with the lapse of time is observed depending upon the heat-compression conditions; and the dimensional recovery ratio is 40% or less when allowed to stand at 23° C. for 200 hours.
A wiper having a washing portion comprising melamine molded foam, wherein said melamine foam is produced by heat-compressing a melamine foam at 210 to 350° C. for 3 minutes or longer to cause plastic deformation, and wherein said melamine foam has a dimensional recovery ratio of 40% or less when allowed to stand at 23° C. for 200 hours.
A process for producing a melamine molded foam, which comprises heat-compressing a melamine foam at a temperature lower than the decomposition temperature of the melamine monomer constituting the melamine foam by 140° C. or less for 3 minutes or longer to cause plastic deformation.
Dependencies are inferred from the claim text.