Kuraray Co., Ltd.

Toshinori Ishii

Masanori Sato

Syuji Kawai

Kunihiko Shimamura

Keiji Matsumura

Kenji Shirano

Isao Ohnishi

Seio Anzai

Hisanobu Hori

Toshimasa Kanemitsu

Noriaki Hayashikoshi

Masahiko Nishimori

An apparatus for and a method of manufacturing a fiber reinforced thermoplastic sheet-shaped molding including a pre-impregnating process and a final impregnating process. A sheet of thermoplastic resin and a web of reinforcement fibers are supplied through the pre-impregnating process during which the thermoplastic resin is sucked under the influence of a suction force so as to partially penetrate into interstices in the reinforcement fiber web while both are transported around and by a perforated rotary drum, thereby to form a first preformed sheet. The first preformed sheet is subsequently supplied to the final impregnating process during which an impregnating machine is employed. As the first preformed sheet is passed through the impregnating machine while compressed inwardly and heated, the thermoplastic resin is allowed to completely penetrate into the interstices in the reinforcement fiber web to complete the fiber reinforced thermoplastic sheet-shaped molding upon cooling thereof. The fiber reinforced thermoplastic sheet-shaped molding is made of thermoplastic resin impregnated with reinforcement fibers.

Method and apparatus for manufacturing a fiber reinforced thermoplastic

A wholly aromatic polyester film, (A) which is made of a wholly aromatic polyester consisting essentially of the following recurring units I and II ##STR1## wherein the aromatic ring may be optionally substituted with at least one substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom and a phenyl group, said wholly aromatic polyester comprising 10 to 90 mol % of the recurring unit I and 90 to 10 mol % of the recurring unit II, being capable of forming an optically anisotropic melt phase, and having a melt strength at a temperature 20.degree. C. higher than its transition temperature to liquid crystal of at least 2.0 g/mm.sup.2 ; (B) said film having an oxygen permeability of not more than 1.0 cc.20.mu./m.sup.2.day.atm at a temperature 20.degree. C. and a relative humidity 65%; and (C) said film having thermal shrinkages both in the machine direction and in a direction perpendicular thereto of not more than 1% at a temperature 250.degree. C. Said wholly aromatic polyester film can be produced by melt-extruding a wholly aromatic polyester to form into a film under conditions that a shear rate applied to the wholly aromatic polyester in a molten state at the exit of the molding die is not less than 500 sec.sup.-1.

Production of wholly aromatic polyester film

A wholly aromatic polyester film, (A) which is made of a wholly aromatic polyester consisting essentially of the following recurring units I and II ##STR1## wherein the aromatic ring may be optionally substituted with at least one substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom and a phenyl group, said wholly aromatic polyetser comprising 10 to 90 mol % of the recurring unit I and 90 to 10 mol % of the recurring unti II, being capable of forming an optically anisotropic melt phase, and having a melt strength at a temperature 20.degree. C. higher than its transition temperature to liquid crystal of at least 2.0 g/mm.sup.2 ; (B) said film having an oxygen permeability of not more than 1.0 cc. 20 .mu./m.sup.2. day. atm at a temperature 20.degree. C. and a relative humidity 65%; and (C) said film having thermal shrinkages both in the machine direction and in a direction perpendicular thereto of not more than 1% at a temperature 250.degree. C. Said wholly aromatic polyester film can be produced by melt-extruding a wholly aromatic polyester to form into a film under conditions that a shear rate applied to the wholly aromatic polyester in a molten state at the exit of the molding die is not less than 500 sec.sup.-1.

Wholly aromatic polyester film

The tube of the present invention has no or very small local minute nonuniformity in thickness of EVOH layer, and therefore drawn-formed articles such as blow bottle obtained by draw molding the tube have no streaks and are superior in appearance.

Multilayered tube for draw molding and multilayered container utilizing

Growing community of inventors

Okayama, Japan

Toshinori Ishii