Nonwoven glass fiber mat for facing gypsum board and method of making
First Claim
1. A nonwoven fibrous mat comprising fibers bound together with a mixture containing a cross linked vinyl chloride acrylate copolymer having a glass transition temperature as high as about 113 degrees F.
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Accused Products
Abstract
A new thermoformable nonwoven fibrous mat having properties particularly suited for a facer on insulating gypsum board and the method of making the mat is disclosed. The mat can also be pleated or thermoformed to produce filter elements and preforms for producing a wide range of fiber reinforced composites and laminates. The mat preferably contains a major portion of glass fibers and a minor portion of polyester fibers bound together with up to 35 wt. percent of a cross linked vinyl chloride acrylate copolymer binder having a glass transition temperature as high as about 113 degrees F., preferably about 97 degrees F. The binder also optionally contains about 3-10 wt. percent stearylated melamine.
113 Citations
26 Claims
- 1. A nonwoven fibrous mat comprising fibers bound together with a mixture containing a cross linked vinyl chloride acrylate copolymer having a glass transition temperature as high as about 113 degrees F.
- 15. In a process of making a fibrous nonwoven mat comprising forming a wet, nonwoven web containing fibers, saturating the wet web with an aqueous binder, and drying the mat at a temperature exceeding 250 degrees F., the improvement comprising using as the binder an aqueous latex of a cross linked vinyl chloride acrylate copolymer binder having a glass transition temperature as high as 113 degrees F.
Specification