EFFECTS OF WEATHERING ON THE MECHANICAL PROPERTIES OF FOUR REINFORCED PLASTIC LAMINATES
FOREST PRODUCTS LAB MADISON WI
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Four different reinforced plastic laminates were subjected to outdoor weathering at three sites having entirely different weather conditions. Data obtained from the test to date show that the effect of outdoor exposure varies greatly with different types of laminates and conditions of exposure. The greatest loss in strength was usually associated with exposure at the Florida site. In general, normal and wet flexural strengths of weathered glass-fabric laminates were 90 percent or more of the control strengths, but the high temperature strength was only about 60 to 80 percent of the control. The phenolic-asbestos laminate had a higher overall strength retention than the glass-fabric laminates. Author-PL.