Process for bonding, in particular, lightweight fleeces, and apparatus for performing the process
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United States of America Patent
Stats
-
Jul 27, 1993
Grant Date -
N/A
app pub date -
Dec 16, 1991
filing date -
Dec 16, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the bonding of lightweight fleeces, there is the problem at relatively high feeding velocities of providing the fleece with the required amount of impregnating agent. Also, it has been found that the individual fibers of a fleece move with respect to one another during the impregnating step, and the fleece tends to disintegrate. In order to impart to the fleece, without great expenditure, a strength required for the bonding procedure, the provision is made to subject the fleece to a preliminary bonding step by wetting with cold water prior to application of the bonding agent, for example in a foam padder. It has been discovered under practical conditions that this minor bonding step is adequate for avoiding disintegration of the loose fiber layer within the nip padder during impregnation.
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