Teijin Limited

Tadahiko Takata

Masahiro Yamaguchi

Hirosuke Watanabe

Satoshi Tanaka

Kenkichi Nose

Masuo Tsuge

Masaya Kamiyoshi

Masashi Furukawa

An aromatic polyamide multifilament yarn having a high bonding property to a rubber material and a high resistance to fraying of individual filaments, is produced by impregnating an aromatic polyamide multifilament yarn with a treating liquid comprising a first liquid rubber component (A) comprising at least one rubber compound provided with terminal hydroxyl or epoxy groups and having a molecular weight of 500 to 10,000, a second liquid rubber component (B) comprising at least one rubber compound provided with terminal isocyanate groups and having a molecular weight of 500 to 10,000, and an additive selected from antioxidants, antiaging agents, and epoxy compounds; heat treating the impregnated multifilament yarn at 100.degree. to 260.degree. C. for 30 to 260 seconds; twisting the heat treated multifilament yarn at a twist coefficient K satisfying the relationship (I):

Process for producing rubber-reinforcing aromatic polyamide

A fiber-reinforced polymeric resin composite material useful for producing a shaped composite article having a high thermal stability and mechanical strength, and a low creep strain, comprises a thermoplastic polymeric resin matrix and a number of reinforcing individual fibers embedded within the polymeric resin matrix in such a manner that 10% to 70% by the number of the individual fibers are separated from each other through portions of the polymeric resin matrix and the remaining individual fibers form at least one fiber bundle.

Fiber-reinforced polymeric resin composite material and process for

A modified fibrous material useful as a reinforcing material for rubber articles is produced by applying a cold plasma treatment to a fibrous material comprising at least one type of synthetic fibers selected from aromatic polyamide fibers and polyester fibers under a reduced pressure; by applying an ion-plating treatment with a polyamide vapor to the resultant cold plasma-treated fibrous material under a reduced pressure; by impregnating the resultant ion-plated fibrous material with an RFL adhesive composition comprising a resorcinol-formaldehye precondensation product and a rubber latex; and by curing the adhesive composition in the fibrous material.

Plasma and ion plating treatment of polymer fibers to improve adhesion

A shaped polyester composite material having an excellent bonding property to rubber, comprises a shaped substrate comprising an aromatic linear polyester matrix and 0.3 to 15%, based on the weight of the matrix, of silicon dioxide fine particles having an average size of 5 to 100 millimicrons and dispersed in at least a surface portion of the substrate, and;

Shaped polyester composite material having activated surface thereof and

A polyester fiber composite material useful for reinforcing rubber articles, comprises a polyester fiber substrate impregnated with an impregnating composition containing (A) a polyepoxide compound, (B) a rubber latex, (C) a resorcin-formaldehyde prepolymer and a water-soluble polyurethane compound of the formula (I): ##STR1## wherein A=a tri-hepta valent radical, X=a monovalent residue of blocking compound capable of dissociating from the compound (c) at an elevated temperature, Y=a monovalent residue of an aminosulfonic acid having 2 to 6 carbon atoms or aminocarboxylic acid having 1 to 6 carbon atoms, n=5-30, m=1-5, l=1-5 and l+m=2-6, the impregnating composition having been heat-treated on the substrate at least once at a temperature of 120.degree. C. to the melting point of the polyester fiber.

Polyester fiber composite material useful for reinforcing rubber

A process for preparing a polyester fiber composite material having an excellent bonding property to rubber, a proper softness and a high resistance to fatigue, comprises the steps of first impregnating a polyester fiber material much as fabric, cord or thread, with a first treating liquid containing (A) a polyepoxide compound having two or more epoxy groups per molecule of the compound, (B) a blocked polyisocyanate compound, for example, an addition product of a polyisocyanate compound with a phenol, tertiary alcohol or aromatic secondary amine compound and (C) a rubber latex such as vinyl pyridine-styrene-butadiene terpolymer latex; first drying and heat treating the first impregnated material at a temperature of, preferably, 180.degree. C. or higher but lower the melting point of the polyester fiber material; second impregnating the first impregnated and heat-treated material with a second treating liquid containing a resorcinformaldehyde reaction product, a rubber latex and, optionally, an ethylene urea compound of the formula ##STR1## wherein R is an aromatic or aliphatic hydrocarbon residue and n is 0.1 or 2, and; second drying and heat-treating the second impregnated material at a temperature of, preferably, 120.degree. C. or more but lower than the melting point of the polyester fiber material.

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Osaka, Japan

Tadahiko Takata