초록 ▼

The present invention provides a mat adapted to reinforce a thermosetting matrix material to form a composite, composites formed therefrom, and methods related thereto. The mat includes a primary, supporting layer having a plurality of randomly oriented essentially continuous glass fiber strands. Th

The present invention provides a mat adapted to reinforce a thermosetting matrix material to form a composite, composites formed therefrom, and methods related thereto. The mat includes a primary, supporting layer having a plurality of randomly oriented essentially continuous glass fiber strands. The primary layer has about 1 to about 10 weight percent of the mat on a total solids basis. The mat also includes a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer including a plurality of glass fiber strands. The mean average length of the glass fiber strands of the secondary layer ranges from about 20 to about 125 millimeters. The strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together.

대표청구항 ▼

[ Therefore, we claim:] [1.] A mat adapted to reinforce a thermosetting matrix material to form a reinforced composite, the mat comprising:(a) a primary, supporting layer comprising a plurality of randomly oriented essentially continuous glass fiber strands coated with a sizing composition on at lea

[ Therefore, we claim:] [1.] A mat adapted to reinforce a thermosetting matrix material to form a reinforced composite, the mat comprising:(a) a primary, supporting layer comprising a plurality of randomly oriented essentially continuous glass fiber strands coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and(b) a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer comprising a plurality of glass fiber strands coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the mean average length of the glass fiber strands of the secondary layer ranging from about 20 to about 125 millimeters, wherein the strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together and the mat has a surface weight ranging from about 300 to about 3060 grams per square meter.