Teijin Limited

Akebono Brake Industry Co., Ltd.

Hiromitsu Takamoto

Gentaro Yamashita

Nobuo Taneda

Kiyoshi Yamamoto

Toru Matsubayashi

Keizo Shimada

Yuzo Aito

Yutaka Tabe

Yasusaburo Sugita

Hidetoshi Okamura

A process for the production of a composite molded article having two surface layer (skin) portions of a fiber-reinforced resin (FRP) and a core portion of a porous resin layer between the two surface layer portions, all of which portions are integrated. More specifically, the invention relates to a process for the production of a light-weight and tough composite article having a foamed core-sandwiched structure in which two dense surface layer (skin) portions of a fiber-reinforced resin and a core portion of a porous resin layer having numerous air foams are integrally molded such that the core portion is integrated between the above two dense surface layer portions. This process can be carried out at a low cost by a batch or continuous method.

Process for the production of composite molded article

A friction material having an excellent heat-resistance, comprises 5 to 70% by weight of pulp-like particles consisting essentially of a heat-resistant aromatic polymeric material; 1 to 70% by weight of a fibrous material comprising at least one member selected from inorganic fibrous materials and heat-resistant organic fibrous materials; 1 to 35% by weight of a friction-regulating agent and; 5 to 40% by weight of a thermosetting polymeric resin.

Friction material

In a method of obtaining purified 2,6-naphthalenedicarboxylic acid dimethyl ester by vacuum distilling crude 2,6-naphthalenedicarboxylic acid dimethyl ester under conditions of application of heat, the improvement which comprises vacuum distilling a crude 2,6-naphthalenedicarboxylic acid dimethyl ester having an acid value (A.sub.f), as expressed in milligrams of KOH required for neutralizing the carboxyl groups contained in one gram of said crude 2,6-naphthalenedicarboxylic acid dimethyl ester, of from 1.0 to 50.

Method of purifying crude 2,6-naphthalenedicarboxylic acid dimethyl ester

A process for preparing dimethyl 2,6-naphthalenedicarboxylate, which comprises continuously esterifying 2,6-naphthalenedicarboxylic acid with methanol at a temperature of about 140.degree. to about 350.degree. C. in the presence or absence of an esterifying catalyst, said 2,6-naphthalenedicarboxylic acid being fed into an esterification reaction zone in the form of solid particles having a specific surface area of about 4,000 cm.sup.2 /g.

Process for preparing dimethyl 2,6-naphthalenedicarboxylate

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Iwakuni, Japan

Hiromitsu Takamoto