A wet-laid fibrous product is provided that comprises recycled cellulosic fibers, cellulose ester staple fibers, and residual recycled ink, where the fibrous product has less ink content compared to the ink content for a 100% cellulose comparative fiber wet-laid product, when processed under similar conditions. The wet-laid fibrous product can be formed from a deinked recycled paper pulp slurry, the pulp slurry comprising recycled cellulosic fibers, cellulose ester staple fibers, and ink. A deinking process for the slurry is also provided.

A wet-laid fibrous product is provided that comprises recycled cellulosic fibers, cellulose ester staple fibers, and residual recycled ink, where the fibrous product has less ink content compared to the ink content for a 100% cellulose comparative fiber wet-laid product, when processed under similar conditions. The wet-laid fibrous product can be formed from a deinked recycled paper pulp slurry, the pulp slurry comprising recycled cellulosic fibers, cellulose ester staple fibers, and ink. A deinking process for the slurry is also provided.

A method of treating tough inorganic fiber bundles including opening a plurality of the tough inorganic fiber bundles such that tough inorganic fibers can be dispersed in a liquid slurry to lay down a homogenous fiber aggregate, wherein the tough inorganic fibers have a crush settle volume of greater than 250 ml, optionally greater than 450 ml. Also, a method of treating tough inorganic fiber bundles including dispersing a plurality of the tough inorganic fiber bundles in a slurry with a dilution of about 0.1% to about 2%, optionally about 0.1% to about 1%, effective to lay down a homogenous fiber aggregate, wherein the tough inorganic fibers have a crush settle volume of greater than 250 ml, optionally greater than 450 ml.

This precursor sheet for a fuel cell separator comprises a conductive substrate sheet, a dense layer including first graphite particles, and a conduction layer including second graphite particles, wherein the dense layer and the conduction layer include a resin, the first graphite particles have a volume resistivity of 20 m?.Math.cm or greater and a bulk density of 1.7 g/cm.sup.3 or greater when compressed at 30 MPa, and the second graphite particles have a volume resistivity of less than 20 m?.Math.cm and a bulk density of 1.5 g/cm.sup.3 or greater when compressed at 30 MPa. This precursor sheet for a fuel cell separator provides a fuel cell separator that has excellent shapability and good mechanical strength, conductivity, and gas impermeability.

This precursor sheet for a fuel cell separator comprises a conductive substrate sheet, a dense layer including first graphite particles, and a conduction layer including second graphite particles, wherein the dense layer and the conduction layer include a resin, the first graphite particles have a volume resistivity of 20 m?.Math.cm or greater and a bulk density of 1.7 g/cm.sup.3 or greater when compressed at 30 MPa, and the second graphite particles have a volume resistivity of less than 20 m?.Math.cm and a bulk density of 1.5 g/cm.sup.3 or greater when compressed at 30 MPa. This precursor sheet for a fuel cell separator provides a fuel cell separator that has excellent shapability and good mechanical strength, conductivity, and gas impermeability.

A holding material including: inorganic fibers that include 70 wt % or more of an alumina component an organic binder other than polyacrylamide of which the surface is negatively charged, alumina sol, and polyacrylamide having a weight-average molecular weight of 3,000,000 to 6,000,000, wherein the amount of the alumina sol is 2 to 8 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers, and the amount of the polyacrylamide is 0.01 to 1.0 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers.

A holding material including: inorganic fibers that include 70 wt % or more of an alumina component an organic binder other than polyacrylamide of which the surface is negatively charged, alumina sol, and polyacrylamide having a weight-average molecular weight of 3,000,000 to 6,000,000, wherein the amount of the alumina sol is 2 to 8 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers, and the amount of the polyacrylamide is 0.01 to 1.0 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers.

The present invention relates to a method of manufacturing a fibre web which includes a fibre matrix that is comprised of natural fibres and possibly synthetic fibres. According to the present method, an aqueous, planar fibre layer is prepared from the natural fibres and possible synthetic fibres, which layer comprises an aqueous phase and a fibrous phase, and which layer is dried in order to remove the aqueous phase, in which case the natural fibres and possible synthetic fibres together form a fibre matrix. According to the present invention, binder is applied onto the water-containing fibre layer, which binder is allowed to penetrate via the aqueous phase at least partially in between the fibres, before the hydrogen bonds between the fibres form. With the present invention, it is possible to manufacture such cellulose or lignocellulose-based fibre products which have plastic-like properties, such as good fracture toughness, tear resistance and stretching.

The paper-like nanocomposite material can be used as capillary-porous elements of evaporative-type air-cooling units. As mineral fibers, glass fibers with a diameter of 0.4 m are used. These fibers are hydrophilic; they do not swell and have a large specific surface area. As a binder, sodium aluminate and aluminum sulfate are used at a predetermined ratio.

The material is made on traditional papermaking equipment using casting technique with a specified ratio of the above components.

The technical result is the obtainment of a paper-like material having high properties in height and time of water rise, moisture capacity and strength. The material is also characterized by thermic, chemical and biological stability, absence of toxicity and zero emission of substances harmful to the human body into the air, resistance of its properties to the effects of mold, fungi and microorganisms in the aquatic environment.

Provided is a method of producing an inorganic fiber mat the method including: a preparing step of preparing a first inorganic fiber molding derived from a needle-punched mat and a second inorganic fiber molding derived from a papermaking mat; a defibrating step of defibrating the first inorganic fiber molding and the second inorganic fiber molding to obtain defibrated inorganic fibers; and a papermaking step of forming the inorganic fiber mat by papermaking using a slurry containing the defibrated inorganic fibers.