Seamless tube useful to make roofing battens and related method
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United States of America Patent
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Sep 7, 1993
Issued Date -
N/A
app pub date -
Jun 24, 1991
filing date -
Jan 6, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
A seamless tube useful in making a roofing batten is extruded from a polymeric material consisting essentially of a major amount of poly(ethylene terephthalate) and a minor amount of at least one polyolefin, flattened in a vacuum sizer so as to define two plies, and milled and drawn so as to orient the tube longitudinally. As milled and drawn, the tube is oriented so as to have a tensile strength of at least about 25,000 psi in a longitudinal direction. The plies are punched so as to have holes therethrough at spaced intervals along the tube. When used to make a roofing batten to coact with conventional fasteners, such as roofing screws, the tube exhibits superior characteristics of split resistance and pull-through resistance.
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