초록 ▼

A mica-filled glass fiber sheet which is smooth, of relatively low porosity, and dimensionally stable is described as is its method of manufacture. The sheet is prepared from a low-consistency aqueous slurry wherein the solids consist essentially of glass fibers, organic fibers, mica, and binder. Ba

A mica-filled glass fiber sheet which is smooth, of relatively low porosity, and dimensionally stable is described as is its method of manufacture. The sheet is prepared from a low-consistency aqueous slurry wherein the solids consist essentially of glass fibers, organic fibers, mica, and binder. Based on 100 parts by weight glass fibers, 3 to 15 parts by weight organic fibers, 30 to 100 parts by weight mica flakes, and 5 to 20 parts by weight organic binder are added to the water in preparing the furnish. In forming the sheet, this slurry or furnish is deposited onto a moving screen, the excess water is removed, and the wet laid sheet is dried and the binder set. In a subsequent operation, the sheet is saturated with a resin solution or latex.

대표청구항 ▼

A method of making a smooth, dimensionally stable mica-filled, glass fiber sheet having low porosity comprising: (a) preparing without prepulping an aqueous slurry having a pH below about 4.0 consisting essentially of glass fibers and, based on 100 parts by weight glass fibers, from 3 to 15 parts by

A method of making a smooth, dimensionally stable mica-filled, glass fiber sheet having low porosity comprising: (a) preparing without prepulping an aqueous slurry having a pH below about 4.0 consisting essentially of glass fibers and, based on 100 parts by weight glass fibers, from 3 to 15 parts by weight organic fibers, 30 to 100 parts by weight mica flakes, and 5 to 20 parts by weight binder; (b) diluting the slurry to a consistency between about 0.01% and 0.05% by weight solids; and (c) depositing said slurry onto a moving screen, removing the excess of water to form a water laid sheet, and drying the sheet to set the binder. A mica filled glass fiber web of low porosity consisting essentially of 100 parts by weight of low alkali content glass fibers having diameters in the range of 3-15 microns and an average length of ¼to ½inch; from 3-15 parts by weight synthetic organic fibers of an average length of ¼to ½inch and deniers between about 1 and 6; 30 to 100 parts by weight mica flakes of a size range between about 20 and 100 mesh; and 5 to 20 parts by weight binder.