An Improved Acrylic Sheet Material with Enhanced Craze Resistance,
SWEDLOW INC GARDEN GROVE CA
Pagination or Media Count:
This paper describes a new acrylic material developed by Swedlow, Inc., Acrivue 351, which has been designed to provide improved resistance to water-induced crazing when compared to current acrylic materials. Acrivue 351 combines the high inherent craze resistance of MIL-P-8184 acrylic plastic with the low moisture uptake characteristic of MIL-P-5425. Stretching of Acrivue 351 further enhances its inherent craze resistance. Results of lab craze studies are presented, comparing as-cast Acrivue 351 to MIL-P-8184 and MIL-P-5425 acrylic materials. Standard solvent stress crazing tests were used to determine craze resistance of these materials as a function of water content. The crazing stress advantage of Acrivue 351 over the other cast acrylic materials increases upon exposure to moisture. Other properties of Active 351 are very similar to MIL-P-8184 acrylic sheet.