Polymeric foam tube insulations and method for continuously producing such a tube
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United States of America Patent
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Dec 21, 2010
Grant Date -
May 17, 2007
app pub date -
Jul 18, 2003
filing date -
Jul 18, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The foam tube for pipe insulations has an external surface and an internal surface. The internal surface is provided with an adhesively bonded layer of fibers. The fibers are a material having a melt temperature that is higher than that of the polymeric foam. The fibers are adhesively bonded to the internal surface such as to stand up from the internal surface. The fibers are substantially uniformly distributed over the internal surface providing a surface coverage of 2 to 20 percent. Further, the fibers have a linear density of 0.5 to 25 dtex and a length of 0.2 to 5 mm. With this fiber layer the polymeric foam tube has an improved thermal resistance and thermal conductivity.
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