Ichikawa Co., Ltd.

Takao Yazaki

Atsushi Ishino

Yuya Takamori

Shintaro Yamazaki

Nobuharu Suzuki

Ai Tamura

Kenji Inoue

Hiroyuki Oda

Takashi Ouchi

Hirofumi Murakami

Yoshiaki Ito

Ryo Umehara

A papermaking felt which can be easily engaged in a papermaking machine, wherein the work time for engaging the felt is short, the initial warming-up period until reaching the highest papermaking speed is short, and the felt life is long, which is achieved by integrating and attaching by dispersion in the batt layer of the felt a polymeric elastomer having high deformability when pressure is applied and good recoverability after pressure is applied, which polymeric elastomer is attached in an amount of 0.5 to 20 wt. % of the felt, and which polymeric elastomer has a property that when in the form of a film and when measured at a room temperature of 20&#xb0; C. and a relative humidity of 65%, the 100% modulus value of the film is 1 to 100 kg/cm, the residual strain after 100% elongation is 30% or less.

Papermaking press felt and papermaking method

A process belt for papermaking with a long operational life including an integrated structure of a reinforcing fibrous base material and a polyurethane layer is disclosed. The reinforcing fibrous base material is embedded in the polyurethane and the outer peripheral surface and the inner peripheral surface are made of the polyurethane. Nanoparticles including, as a main component, a silicon oxide component, the surface of which is treated with an organic silane coupling agent, are homogeneously dispersed in one part or all of the polyurethane.

Papermaking process belt and method for making the same

A process belt for papermaking with a long operational life comprises an integrated structure of a reinforcing fibrous base materialand a polyurethane layer, the reinforcing fibrous base material being embedded in the polyurethane, wherein an inorganic filler selected from calcined kaolin clay, fused silica and zeolite is homogeneously dispersed in the polyurethane.

Process belt for papermaking and method for making the same

Papermaking felts include a base material and a batt layer provided on one or both sides of the base material. The batt layer includes a water-absorbing resin, and the water-absorbing resin has a coefficient of water absorption of from 1.05 and 10.

Papermaking felt

A papermaking shoe press belt is formed of a reinforcing fiber base material and a polyurethane layer integrated with each other. The reinforcing fiber base material is embedded in the polyurethane layer. The papermaking shoe press belt includes, as the polyurethane layer, a polyurethane layer obtainable by curing a composition composed in combination of a urethane prepolymer and one or more curing agent. The urethane prepolymer is obtainable by reacting a p-phenylene diisocyanate compound with a long-chain polyol. The at least one curing agent is selected from 4,4'-methylene bis(2,6-diethyl-3-chloroaniline), 4,4&#x2032;-methylene bis(2-chloroaniline), methylene bis(2-ethyl-6-methylaniline), 4,4&#x2032;-methylene bis(2-ethylbenzeneamine), methylene bis(2,3-dichloroaniline), 4,4&#x2032;-methylenedianiline, 3,5-dimethylthiotoluene-2,4-diamine, 3,5-dimethylthiotoluene-2,6-diamine, 3,5-diethyltoluene-2, 4-diamine, 3,5-diethyltoluene-2,6-diamine, polytetramethylene oxide di-p-aminobenzoate, poly(tetramethylene/3-methyl tetramethylene ether)glycol bis(4-aminobenzoate) , trimethylene bis(4-aminobenzoate) and isobutyl 4-chloro-3,5-diaminobenzoate.

Papermaking shoe press belt

A belt for papermaking shoe press is provided which comprises a reinforcing fibrous base () and a polyurethane layer () united therewith, the reinforcing fibrous base () having been embedded in the polyurethane layer (). The belt includes a polyurethane layer obtained by curing a mixture comprising: a urethane prepolymer obtained by reacting a polyisocyanate compound selected among p-phenylene-diisocyanate, 4,4'-methylene-bis(phenyl isocyanate), and tolylene-diisocyanate with a polyol compound selected among polypropylene glycol, polytetramethylene glycol, and a polycarbonate diol; a hardener selected among an aliphatic diol compound, hydroquinone-bis-&#x3b2;-hydroxyethyl ether, and organic polyamine compound; and an aliphatic triol compound. Due to this layer, the shoe press belt for papermaking is excellent in wearing resistance and flexing fatigue resistance.

Shoe press belt for papermaking

Disclosed is a shoe press belt () which comprises a reinforcing fibrous base material () embedded in a polyurethane layer, and has an outer circumference layer () and an inner circumference layer () each formed with a polyurethane. The polyurethane layer comprises a polyurethane which is produced by curing a composition comprising a mixture of an urethane prepolymer (A) and a curing agent (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound (a) containing 55 to 100 mol % of a p-phenylene-diisocyanate compound with polytetramethylene glycol (b) and has an isocyanate group at its terminal. The curing agent (B) is selected from the group consisting of 1,4-butanediol, hydroquinone bis-&#x3b2;hydroxylethyl ether, 3,5-diethyltoluenediamine and 3,5-dimethylthiotoluenediamine. The belt () has excellent cracking resistance, bending fatigue resistance and wear resistance.

Shoe press belt for paper making

Disclosed is a shoe press belt () which comprises a reinforcing fibrous base material () embedded in a polyurethane layer, and has an outer circumference layer () and an inner circumference layer () each formed with a polyurethane. The polyurethane layer constituting the outer circumference layer () comprises a polyurethane which is cured by the reaction of an urethane prepolymer (A) with a curing agent mixture (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound selected from p-phenylene-diisocyanate and 4,4'-methylenebis(phenylisocyanate) with a polytetramethylene glycol and has an isocyanate group at its terminal. The curing agent mixture (B) comprises 1,4-butanediol and an aromatic polyamine having an active hydrogen group (H). The shoe press belt has excellent wear resistance, cracking resistance and bending fatigue resistance.

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Tokyo, Japan

Takao Yazaki