Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Coated or impregnated woven – knit – or nonwoven fabric which... – Two or more non-extruded coatings or impregnations
Patent
1999-03-23
2000-06-27
Weisberger, Richard
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Coated or impregnated woven, knit, or nonwoven fabric which...
Two or more non-extruded coatings or impregnations
442 62, 442 65, 442 71, 428356, 428901, B32B 2700, B32B 3100
Patent
active
060806842
ABSTRACT:
A method for coating cloth especially fiberglass sheets with a thermosetting resin and resulting structure is provided. The coating is performed in two steps. In the first step, essentially all of the strands of the fiberglass are coated with the resin/solvent mixture while maintaining at least some of the interstices or openings essentially free of the solvent mixture. This first coating is then partially cured to between about 70% and 90% of full cure. The coated fiberglass with partially cured resin thereon is then given a second coating of either the same or different thermosetting resin mixture which coats the first coating and fills in the interstices between the fibers. This second coating is then partially cured, which advances the cure of the first coating past 80% full cure and results in an impregnated fiberglass cloth structure for use as sticker sheets. During lamination, the first coating acts like an impenetrable insulating sheet, preventing resin displacement and, therefore, preventing glass fiber contact with the conductive planes. The second coating is fluid enough to fill in spaces in the planes and to form the adhesive bond to cores and conductive layers. The structure reduces the tendency of the resin to flake and produce dust during subsequent processing operations.
REFERENCES:
patent: 3932250 (1976-01-01), Sato et al.
patent: 4737403 (1988-04-01), Simpson et al.
patent: 4997703 (1991-03-01), Gehrig
patent: 5470647 (1995-11-01), Zimics et al.
patent: 5582872 (1996-12-01), Prinz
patent: 5620789 (1997-04-01), Gan et al.
Appelt Bernd Karl
Fotorny William Thomas
Japp Robert Maynard
Papathomas Kostantinos
Poliks Mark David
Hogg William N.
International Business Machines - Corporation
Weisberger Richard
LandOfFree
Dustfree prepreg and method for making an article based thereon does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dustfree prepreg and method for making an article based thereon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dustfree prepreg and method for making an article based thereon will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1784649