Patent ID: 8084378

Claim:
A fiber mat, fabric, or scrim product having a high resistance to alkaline materials, made by a wet-laid process wherein a wet fibrous interim product is saturated with an aqueous binder blend, said product having a pH of at least 8 and particularly to a saturated calcium hydroxide aqueous solution, said product comprising fibers and/or one or more strands of fibers, a majority of the weight of the fibers in the mat and fabric being glass fibers and/or one or more strands of glass fibers, the fibers bonded together at locations where the fibers and/or the one or more strands of fibers cross each other throughout said product with about 10 to about 35 wt. percent cured binder blend, based on the dry weight of said product when dry, the cured binder blend comprising 1 to about 60 wt. percent of a urea formaldehyde binder ingredient and from about 60 up to 99 wt. percent of a melamine formaldehyde binder ingredient, the total percentages of binder ingredients adding to 100 percent of the binder blend in said product.