Fiber moisture control in the formation of dry-laid webs
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 25, 1986
Grant Date -
N/A
app pub date -
Jun 18, 1981
filing date -
Jun 18, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of and apparatus for forming an air laid, e.g., dry laid, fibrous web comprising the steps of and apparatus for defiberizing wood pulp laps, rolls or bales, preferably in a hammermill; transporting the fibers pneumatically to a forming head, and dispensing said fibers onto a foraminous support means, the aforesaid operations being carried out at conditions of high humidity such that the average fiber moisture content is at least above 2.5% by weight just prior reaching a forming header. In the preferred embodiment air at between about 150.degree. to about 200.degree. F. and having a relative humidity of between about 75 to 95% is introduced to the defiberizer to provide the requisite air moisture content. If desired over large fibers from the forming head may be recycled to the defiberizer. By practicing the invention, electrostatic charges on the fibers are reduced thereby minimizing clumping and ensuring better formation.
First Claim
Other Claims data not available