Method for heat treatment of fibrous mats
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United States of America Patent
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-
Feb 23, 1982
Issued Date -
N/A
app pub date -
May 18, 1979
filing date -
Jun 5, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A technique is disclosed for heat treatment of fibrous mats, especially mats formed of mineral fibers such as glass and carrying a heat hardenable binder material, such as a thermosetting resin. The method disclosed provides for continuous feed of the mat through a curing or treating oven having a plurality of heat treatment zones. In one form of the method, the heat treatment in at least one zone is effected by circulation of a heated gas, such as air, through the mat in said zone, and the mat is also subjected to heat treatment in a localized area lying within said zone by passage of a second heated gas through the mat, the second heated gas having a pressure higher than that in the surrounding portions of said zone.
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