Abstract
The properties are described of low-ammonia latex concentrates produced by gamma-ray irradiation (0.5–2.0 Mrad dose) in the presence of carbon tetrachloride or chloroform as sensitizer. Dipping trials with irradiated concentrates and irradiated field latex, for the preparation of condoms and medical gloves, gave products with high ultimate elongation, low modulus, and high permanent set. A change from straight dipping and a heat treatment after drying resulted in improved physical properties. A notable feature of products prepared from these materials is their purity, i.e., low content of rubber chemicals. An economic disadvantage, at the present time, is the high initial cost of the irradiation equipment.
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