Mitsui Toatsu Chemicals, Incorporated

Mitsui Chemicals, Inc.

Hitec Co., Ltd.

Amdahl Corporation

Hideaki Oikawa

Akihiro Yamaguchi

Shoji Tamai

Masahiro Ohta

Saburo Kawashima

Katsuaki Iiyama

Wataru Yamashita

Yoshiho Sonobe

Yoshihiro Sakata

Kouji Ohkoshi

Keizaburo Yamaguchi

Yuichi Okawa

Atsushi Shibuya

Tadashi Asanuma

Hidetoshi Hayashi

Nobuhito Koga

Kouki Fukumura

Hiroshi Sonoda

Tomohito Koba

Yuko Ishihara

Mitsunori Matsuo

Toshiyuki Kataoka

Junko Naruse

Tomomi Yoshimura

Yasunori Yoshida

Keisuke Takuma

Takashi Kuroki

Tatsuo Nakamura

Toshiyuki Nakakura

Satoru Kishi

Hideo Sakai

Masaji Yoshimura

Chiaki Maruko

Misao Masuda

Masao Yoshikawa

Hiroyasu Kido

Tsuyoshi Yasutake

Tomomi Okumura

Kayako Yanagihara

Ken'ichi Goto

Takashi Shimaoka

Teruyuki Nagata

Kenichi Sugimoto

Masanobu Ajioka

Atsuo Otsuji

Takashi Arai

Masatoshi Takagi

Tatsuhiro Urakami

Kenichi Goto

Akio Karasawa

Tsutomu Ishida

Takayuki Fujimaki

Katsuji Watanabe

Toshio Kitashima

Rihoko Suzuki

Hideki Umetani

Toshihiro Motoshima

Hisato Ito

Hirokatsu Harasawa

Katsuaki Liyama

Yoshiho Snobe

Provided is a sausage sticking system capable of changing a position and an interval at which a chain of sausages is hung on a stably held stick according to a length of a casing. The sausage sticking system includes a hook conveying unit, a stick holding unit, and a pivoting imparting unit. A loop of a chain of sausages hooked on each of the pivoting hooks of the hook conveying unit is configured to be dropped onto a stick passing through the loop by which pivoting hooks are pivoted. The stick holding unit holds both ends of the stick, and includes a fixed arm and a pair of actuating arms, wherein the pair of actuating arras alternately holds the stick and avoids the loop of the chain of sausages. The pivoting imparting unit sequentially pivots the plurality of pivoting hooks at a predetermined pivoting imparting position.

Sausage sticking system

Provided is a stick turning device capable of turning a stick on which a chain of sausages is suspended while reducing defects in the sausages when delivering the stick from an upstream device to a downstream device. The stick turning device includes a turning arm unit, a turning driving unit, and an actuator unit. The turning driving unit causes the turning arm unit to turn at a predetermined angle around a turning shaft. The actuator unit lifts the turning arm unit such that both ends of the stick are horizontally picked up from the upstream device and the stick is lifted, and such that by bringing the stick close to the turning shaft, a peripheral speed of the stick is reduced with respect to a turning speed of the turning driving unit, and defects in the sausages are reduced, and lowers the stick turned by the turning driving unit.

Stick turning device for stick on which chain of sausages is suspended

Polyamic acid, polyimide, process for producing these, and film of the polyimide

This invention provides crosslinkable-group-containing polyimides of various known thermoplastic polyimide backbone structures, which are provided with far better heat resistance, chemical resistance and mechanical properties than known polyimides of the structures without impairing excellent moldability or formability, superb sliding property, low water absorption property, outstanding electrical properties, high thermal oxidation stability and high radiation resistance, all of which are inherent to the structures.

Polyimide containing crosslinkable group and process for producing the same

A thermoplastic polyimide having good thermal stability, comprising a repeating unit represented by the chemical formula (1), a molecular terminal being composed of the chemical formula (2) and/or chemical formula (3), characterized in that: a melt viscosity ratio calculated by the numerical formula (1) and/or the numerical formula (3) is within a numerical range shown in the numerical formula (2) and/or the numerical formula (4) and 1,3-bis(4-aminophenoxy)benzene represented by the chemical formula (3) for production of the above polyimide, characterized in that the content of an azo compound is from 0.0 to 0.2%. The thermoplastic polyimide of the present invention has excellent characteristics {circle around (1)} to {circle around (4)} described below. {circle around (1)} It is superior in thermal stability on melting. That is, the degree of lowering of the fluidity on melting with a lapse of time is small and it is possible to apply to conventional melt molding. {circle around (2)} It has high heat resistance. {circle around (3)} It is superior in productivity. {circle around (4)} It is superior in dimensional accuracy.

Crystalline polyimide for melt molding with satisfactory thermal stability

Fluorination agent and preparation and use of same

Process for producing fluorinated silicon compound

A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinating agent, a bis-dialkylamino-difluoromethane compound, for example, 2,2&prime;-difluoro-1,3-dimethylimidazolidine, is exemplified. According to the process, an industrially useful fluorinated aromatic compound, for example, a fluorobenzene, a fluorine substituted benzophenone, a fluorine substituted diarylsulfone can be prepared with ease in economy without specific equipment.

Preparation process of fluorine substituted aromatic compound

There is disclosed an organic optical component prepared from a resin essentially comprising one or more repetitive structural units selected from the group consisting of structures represented by general formula (1); ##STR1## wherein A is either of the groups below. ##STR2## This invention provides an organic optical component with excellent transparency, heat resistance and mechanical strength as well as a low birefringence. This invention also provides a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.

Fluorine-containing polyamide

A polyimide resin composition is disclosed herein which comprises 5 to 60% by weight of a polyimide [polyimide (1)] having a repeating unit represented by the chemical formula 1 and 40 to 95% by weight of a polyimide [polyimide (2)] having a repeating unit represented by the chemical formula 2. According to the present invention, there are provided a polymer alloy in which the advantages of the polyimide (1) and the polyimide (2) are utilized and the disadvantages of the polyimide (1) and the polyimide (2) are reduced; a polyimide resin composition from which crystalline molded articles can be obtained even by a usual molding cycle, for example, an injection molding cycle of about 30 to 60 seconds; and a polyimide resin composition from which molded articles having an excellent dimensional accuracy and flexural modulus can be obtained even by a usual molding cycle, for example, an injection molding cycle of about 30 to 60 seconds, for example, in the case that the molded articles are intended to be used at a high temperature of 230.degree. C. or more, for example, a temperature of 230 to 300.degree. C., or 230 to 250.degree. C.

Polyimide resin composition

A low-birefringent organic optical component comprising a polymer prepared by polymerizing a racemic mixture of the monomer with an asymmetric spiro ring represented by general formula (1) as an essential ingredient; wherein ring A represents a monocyclic or polycyclic organic group, wherein two ring As are mutually bound each other via a spiro bond to form a spiro ring which has a molecular asymmetric structure; n is an integer of 0 to 10; X.sub.1 and Y.sub.1 are binding groups; and Z.sub.1 is a polymerization-active group. The component has excellent transparency, mechanical strength and heat resistance, as well as a low birefringence.

Low-birefringent organic optical component and a spirobiindan polymer

A low birefringent organic optical component prepared from a resin consisting essentially of one or more repetitive structural units selected from the group consisting of structures represented by general formula (1); ##STR1## wherein A is either of the groups below. ##STR2## The organic optical component can exhibit excellent transparency, heat resistance and mechanical strength as well as a low birefringence. Also provided is a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.

Organic optical component

Novel thermoset polyimide and composite materials comprising the thermoset polyimides and a fibrous reinforcement are prepared according to this invention. The thermoset polyimides are obtained by heat-treating a linear polyamic acid or a linear polyimide prepared by using 4,4'-bis(3-aminophenoxy)biphenyl and pyromellitic dianhydride as essential monomers or by adding 4,4'-diaminodiphenyl ether or 3,3',4,4'-biphenyltetracarboxylic dianhydride to the essential monomers and by end-capping the molecular chain end with an aromatic dicarboxylic anhydride having a carbon-carbon triple bond. The thermoset polyimides have essential excellent properties of thermoplastic polyimide and additionally has enhanced heat resistance and improved mechanical properties. The thermoset polyimide can be used to provide various kinds of composite materials for aircraft matrices, electric and electronic appliances and others.

Linear polyamic acid, linear polyimide and thermoset polyimide

In one aspect, the present invention relates to polyimides having excellent thermal resistance and process for preparing the same comprising carrying out condensation of 4,4'-bis(3-aminophenoxy)biphenyl with pyromellitic dianhydride in the presence of a different diamine compound and optionally with a different tetracarboxylic acid dianhydride. In a second aspect, the present invention relates to a heat resistant resin composition consisting essentially of an aromatic polyetherimide and a defined polyimide. In a third aspect, the present invention relates to a polyimide resin composition comprised on a defined polyimide and a separate high-temperature engineering polymer. In a fourth aspect, the present invention relates to a resin composition comprised of a defined polyimide and an aromatic polyamideimide.

Polyimides, process for the preparation thereof and polyimide resin

A polyimide resin composition substantially comprising 1 99.9.about.50 parts by weight of polyimide having recurring structural units of the formula ##STR1## and 2 0.1.about.50 parts by weight of a polyimide which improved melt flowability and is prepared by using 1,3-bis(3-aminophenoxy)benzene or 6,6'-bis(3-aminophenoxy)-3,3,3',3'-tetramethyl-1,1'-spirobiindane as essential diamine component, or polyether pyridine having recurring structural units of the formula: ##STR2## is disclosed. Further, a polyimide based resin composition comprising the polyimide resin composition or a polyimide copolymer obtained by using the above diamines and a fibrous reinforcement is disclosed. These compositions have remarkably good processability, excellent heat stability and repeated fatigue characteristics.

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Kanagawa, Japan

Hideaki Oikawa