Heat recoverable article
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United States of America Patent
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Jun 12, 2001
Grant Date -
N/A
app pub date -
Nov 26, 1997
filing date -
May 31, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dimensionally heat recoverable tubular article (1) is made by spirally wrapping cross-linked polymeric sheet (3) a number of times, and directly fusing together overlapping layers (5) of the cross-linked sheet (3) to form a consolidated tubular article. The final article has a wall thickness of at least 2.2 mm. Articles according to the invention may be made of different diameter and different wall thickness, starting from the same thickness initial sheet material, simply by changing the circumference of wrapping or the number of spiral wraps. Articles according to the invention are particularly useful as casings over joints between district heating pipes.
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