Paper making and fiber liberation – Processes and products – Pore forming in situ
Patent
1993-04-22
1995-02-28
Chin, Peter
Paper making and fiber liberation
Processes and products
Pore forming in situ
162145, 162156, 162158, 162160, 1621641, 1621643, 1621646, 1621681, 162169, D21H 1340
Patent
active
053933796
ABSTRACT:
A web of nonwoven fibers and thermoplastic matrix polymer is provided that is capable of yielding improved physical properties for articles molded from the web. Also provided are the aqueous dispersion to produce the web and the dried web as a laminate so that it can be molded into shaped articles. The web in addition to the fibers and thermoplastic matrix polymer has a chemically modified thermoplastic polymer. This material can be added to the web by direct addition to the aqueous dispersion or by presence in a mat binder which is applied to the web. Generally, the amount of the chemically modified thermoplastic material present in the web is in the range of around 0.1 to 20 weight percent of the web. When the chemically coupled thermoplastic polymer is added as a mat binder, it can be accompanied by an electron donating organo coupling agent, a stabilizing agent such as one or more carboxylic acids and/or anhydrides which may be monocarboxylic, polycarboxylic aliphatic or cyclic. Additionally, the mat binder can have a film-forming polymer.
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Chin Peter
PPG Industries Inc.
Stachel Kenneth J.
LandOfFree
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