Abstract: Disclosed are a deproteinizing agent comprising a proteolytic enzyme and one or more cationic surfactants selected from the group consisting of an alkylamine salt, an alkylamine derivative and quaternized compounds thereof; and a method of preparing a cationic deproteinized natural rubber latex, which comprises adding said deproteinizing agent to a field latex or an ammonia-treated latex thereby subjecting the latex to a deproteinization treatment and purifying the rubber particles in the latex.
Type:
Grant
Filed:
September 8, 2000
Date of Patent:
July 24, 2001
Assignees:
Sumitomo Rubber Industries, Ltd., Kao Corp.
Abstract: A disposable diaper (1) includes a liquid permeable topsheet (2); a liquid impermeable back sheet (3); an absorbent member (4) interposed between the topsheet and bottom sheet; a fastening tape (10) for securing the diaper (1); and a release tape (30) to which an adhesive surface of the fastening tape is to be adhered. A tensile load of the back sheet (3) at 3% elongation in the transverse direction of the diaper falls within the range of 100 to 300 g/cm. A bulk softness of the back sheet (3) is 55 g or less. A peel strength required to peel the fastening tape (10) from the back sheet at 180.degree. is 400 g/cm or less. The time required until the fastening tape (10) and the back sheet (3) are peeled from each other under a load of 500 g is 10 minutes or longer. An outer surface of the back sheet (3) is not provided with a target tape.