The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1995
Filed:
Apr. 22, 1993
Luciano M Parrinello, Allison Park, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
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.