Light weight board of improved mechanical strength and process for production thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Nov 20, 2003
app pub date -
Jul 10, 2001
filing date -
Jul 10, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention is an extruded, hollow, thermoplastic board which is made of a pair of flat and parallel sheets spaced apart and interconnected by extending ribs of shifted patterns, eg. of a sigmoid pattern, is disclosed in this invention. The thermoplastic sheeting of the invention has stronger tear strength and balanced physical properties as compared to hollow thermoplastic boards with extending ribs of straight pattern of the same specification. The present invention also provides a method for production thereof, wherein a fixing and cooling assembly is oscillated relative to a die, or vice versa, to create the ribs of shifted patterns.
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