Patent ID: 7704437
Filing Date: 2010-04-27
Classification: A45D,B29C,B29K,B29L,Y10T

Abstract:
1. A process for preparing an extrusion-molded foamed cosmetic sponge puff comprising the steps of: forming a rubber compound from a NBR polymer, an organic peroxide, a blowing agent and a synthetic silicic acid as a reinforcing filler and aid for permitting easy passage through press rolls in an amount of 3 to 10 parts by weight per 100 parts by weight of the NBR polymer; extrusion-molding the rubber compound to form an extrusion-molded rubber; heating the extrusion-molded rubber by a combination of hot air and ultra high-frequency heating to cause crosslinking and expansion of the extrusion-molded rubber to provide a thickened sponge having a homogeneous cell structure containing closed cells; passing the thickened sponge through the press rolls to cause the closed cells to partly communicate with each other and form a resultant sheet stock; and cutting the resultant sheet stock into cosmetic sponge puffs of a desired form, wherein the cosmetic sponge puff has an intermediate cell structure in which closed cells partially communicate with each other and the cosmetic sponge puff has a water absorption of 5-500%.