The application of rubber to textiles has made great progress within the last ten years, and the introduction of rubber latex with its high resistance to aging, which is of great importance where textile apparel is worn next to the skin, has virtually opened up a new field. The sock has not altered greatly, and its greatest defect, the formation of holes at the toe and heel areas still remains. It was with the object of reinforcing these areas by impregnation with rubber latex that this research was commenced, resulting in the present process. Briefly, the process is the application to the knitted sock, at the areas to be reinforced, of a rubber latex containing specified amounts of wetting and stabilizing agents so that the latex coagulates after penetration into the wool to a limited extent. The process is essentially an impregnation process, and the meshes between the threads remain open and free from rubber. The resulting hosiery is comfortable, and shows great resistance to the formation of holes. In the development of the process, which occupied several years, numerous difficulties were encountered, not the least being the severe conditions to which the rubber is exposed. The warmth of the body, perspiration, laundry treatment and other factors necessitated a latex compounded to give high resistance to aging.

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