Wet compaction of low density air laid webs after binder applica

Details Wet compaction of low density air laid webs after binder applica Wet compaction of low density air laid webs after binder applica

1981-07-15

1983-11-29

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156209, 264119, 264121, 264128, 428288, B29J 500, B32B 1700

Patent

active

044179316

ABSTRACT:
In the manufacture of low density air laid webs of predominantly ligno-cellulosic material, the method and apparatus for bonding the dry web with binder and compacting the web with a wet, fabric covered surface so as to increase tensile strength and delamination resistance while reducing binder content and cost is described. Wet compaction of the binder laden web enables controlled penetration of the web with a smaller amount of binder than is possible without wet compaction, and also reduces energy consumption in drying due to the use of less binder.

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Attwood and White, "A Dry-Forming Process for Multi-ply Board", Tappi, vol. 62, No. 2, Feb. 1979.
Casey, ed., "Pulp and Paper-Chemistry and Chemical Technology", vol. II, pp. 1112-1115 (3rd. ed. 1980).

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