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公开(公告)号：JPH09323347A
公开(公告)日：1997-12-16
申请号：JP14553696
申请日：1996-06-07
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , KOTOURA MASAAKI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To enhance the modulus of rigidity of liquid crystalline polyester fiber and eliminate its surface defect and further, reduce its oligomer quantity buy blending non-liquid crystalline polyester and liquid crystalline polyester with a specific wt.% of fluidization promoter which reduces a filtration pressure at least in a specific value during the passage of these polymer through filter. SOLUTION: In a method for manufacturing a film by filtering a polymer after extruding it in a molten state from an extruder, the molten polymer is extruded from the extruder which blends non-liquid crystalline polyester and liquid crystalline polyester with one wt.% of addition of fluidization promoter which reduces a filter pressure by at least 10% to be filtered into a film, Further, the non liquid crystalline polyester and the liquid crystalline polyester are blended with the fluidization prompter which is a low molecular weight liquid crystalline polyester of the monopolymer or the copolymer type with a number average molecular weight of 1000-15000 to obtain the film. Thus it is possible to inhibit the shape relaxation of the liquid crystalline polyester fiber and consequently, enhance its modules in torsion and eliminate its surface defect, and further reduce it oligomer quantity.
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公开(公告)号：JPH08142183A
公开(公告)日：1996-06-04
申请号：JP28498694
申请日：1994-11-18
Applicant: TORAY INDUSTRIES
Inventor： KOTOURA MASAAKI , OKAZAKI IWAO , ABE KOICHI
Abstract: PURPOSE: To improve the property of easily curling,the curl recovery, to improve the tear propagation resistance, and to provide a mechanical strength sufficient to reduce the film thickness and dimensional stability by using polyester film in which crystallization parameter, partial melting temperature and partial melting heat quantity at the temperature fall within predetermined ranges. CONSTITUTION: A polyester film contains polyester as a main ingredient. The polyester to be used here should have the properties that the value of crystallized parameter ΔTcg is 20 to 80 deg.C, the partial melting temperature Tp is 80 to 180 deg.C and the partial melting heat quantity at the melting temperature is 0.10 to 2.0cal/g. If the parameter ΔTcg is in a range out of 20 to 8O deg.C, winding trend curl, curl recovery are deteriorated, and a tear propagation resistance becomes small to be not preferable. The film to be used is polyethylene-2,6- naphthalene dicarboxylate, and other polyester is preferably laminated on at least one surface of the film.
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公开(公告)号：JPH07188536A
公开(公告)日：1995-07-25
申请号：JP27896894
申请日：1994-11-14
Applicant: TORAY INDUSTRIES
Inventor： KOTOURA MASAAKI , OKAZAKI IWAO , ABE KOICHI
IPC: C08J5/18 , B29C55/12 , B32B27/36 , C08L67/00 , C08L67/02 , C08L67/03 , G11B5/73 , G11B5/733 , G11B5/738 , G11B5/704
Abstract: PURPOSE:To provide a polyethylene 2,6-naphthalenedicarboxylate film excellent in thermal dimensional stability, scratching resistance and dubbing resistance, and useful as a roll-like photographic photosensitive material, etc., by using polyethylene naphthalenedicarboxylate as a main component and specifying the partial melting temperature of the film. CONSTITUTION:This film consists mainly of polyethylene 2,6- naphthalenedicarboxylate an has a partial melting temperature Tp of 80-180 deg.C. Colloidal silica particles having an average particle size of 0.03-1mum are preferably added to the film in an amount of 0.1-6wt.%. The film is preferably a biaxially stretched film having a heat of fusion of 0.05-0.8cal/g at the partial melting temperature. The film is obtained e.g. by melting and extruding the polymer into a sheet-like product with an extruder, casting the extruded product on a chromium-plated roll to cool and solidify the product, while applying an electrostatic charge, biaxially stretching the cast film, and subsequently thermally treating the stretched film in a heated medium such as water or trichloroethylene.
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公开(公告)号：JP2000071329A
公开(公告)日：2000-03-07
申请号：JP13117599
申请日：1999-05-12
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , KOTOURA MASAAKI , HOSOKAWA HIROBUMI
Abstract: PROBLEM TO BE SOLVED: To obtain a simultaneously biaxially stretched polyester film of high quality excellent in rigidity, toughness, heat shrinkage characteristics or the like and also reduced in thickness irregularity. SOLUTION: A polyester film consists of non-liquid crystal polyester (A) and copolyester (B) having a mesogen group in its main chain forming a phase separated structure in the non-liquid crystal polyester (A). The average dispersing diameter of the copolyester (B) is 0.01-5 μm.
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公开(公告)号：JPH11315153A
公开(公告)日：1999-11-16
申请号：JP3159399
申请日：1999-02-09
Applicant: TORAY INDUSTRIES
Inventor： KOTOURA MASAAKI , YAMAGATA TETSUYA , TSUNEKAWA TETSUYA
IPC: G11B5/84 , B29C47/10 , B29C55/12 , B29K67/00 , B29L7/00 , C08J5/18 , C08L67/02 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PROBLEM TO BE SOLVED: To prepare a polyester film low in oligomer, small in reduction of intrinsic viscosity when subjected to extrusion molding, little in the asperities of the surface and high in elastic property, and to provide a production method of a polyester film capable of largely reducing a filtrating pressure, shearing heat and extrusion torque without reforming any traditional film-producing apparatus by exceedingly reducing a melting viscosity of a polyester raw material with a high intrinsic viscosity when subjected to melting extrusion. SOLUTION: This polyester film comprises (A) a polyester and (B) a styrene- based polymer having an average molecular weight of 1,000 to 20,000. The film is obtained by melt-extruding the polymer A by an extruder 1 and then adding 0.05 to 10 wt.% of the styrene-based polymer B in advance of filtrating the polyester A with a filter 4, followed by conducting a film-forming.
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Patent Agency Ranking
公开(公告)号：JPH115855A
公开(公告)日：1999-01-12
申请号：JP34915497
申请日：1997-12-18
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , KOTOURA MASAAKI , TSUNASHIMA KENJI
IPC: C08J5/18 , B29C48/305 , B29C55/02 , B29K67/00 , B29L7/00 , B29L9/00 , B32B27/36 , C08L67/02 , B29C47/14
Abstract: PROBLEM TO BE SOLVED: To obtain the subject film having a high Young modulus and capable of manifesting excellent surface slipperiness, etc., by controlling the shape of dispersed domains at the film in the surface and central layers of a polymer in a non-liquid crystal polyester. SOLUTION: This film consists of (A) non-liquid crystal polyester and (B) a polymer melt processable and forming a phase separation structure in the component A. The aspect ratio L/D (=Qs) of an average major axis L to an average minor axis D of the dispersing domains of the component B at the surface part of at least one side is smaller than the L/D (=Qc) of the dispersing domains in the center layer part, and the ratio Qc/Qs of Qc to Qs is preferably 2-300. The film is obtained by carrying out a melting and extruding processing of a resin composition comprising the components A and B at a temperature higher than the starting temperature of the crystallization in a temperature- decreasing state and lower than the melting point of the component A, stretching the processed material so as to be 3-10 times magnification in the longitudinal direction and 3-10 times magnification in width direction, and carrying out heat set of the extended film at the temperature not lower than 150 deg.C and lower than the melting point of the component A.
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公开(公告)号：JPH10147697A
公开(公告)日：1998-06-02
申请号：JP30521396
申请日：1996-11-15
Applicant: TORAY INDUSTRIES
Inventor： KOTOURA MASAAKI , TSUNEKAWA TETSUYA , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To produce the subject film, capable of reducing surface defects and the oligomer content and manifesting a high elastic modulus and useful for a magnetic recording medium or a film, etc., for electrical insulation by adding a polysiloxane to a polyester. SOLUTION: This polyester film is produced by compounding (A) a polyester with (B) a polysiloxane [e.g. a straight polysiloxane having 20,000-300,000 molecular weight (concretely methylphenylpolysiloxane, etc.) or an organic modified polysiloxane], as necessary, further (C) a copolyester having (C1 ) mesogen groups in the main chain [e.g. the one having a structural unit of formulae I, II (R1 is 4,4'-biphenylylene, etc.) and formulae III and IV (R2 is 1,4-phenylene, etc.) and having the mesogen groups C1 in the main chain] and preferably contains 0.05-10wt.% component B and 0.1-10wt.% component C.
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公开(公告)号：JPH10139896A
公开(公告)日：1998-05-26
申请号：JP29250196
申请日：1996-11-05
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , KOTOURA MASAAKI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To prepare a transparent polyester film containing small amount of oligomer and excellent in mechanical properties such as Young',s modulus by forming the film with a composition comprising a non-liquid crystalline polyester and a copolymerized polyester having a mesogenic group in the main chain and allowing the film to have a prescribed haze value. SOLUTION: This transparent polyester film comprises a composition comprising (A) a non-liquid crystalline polyester such as polyethylene terephthalate containing 0.1-1.0wt.% cyclic trimer, and (B) a copolymerized polyester, preferably of 0.01-10wt.% having a mesogenic group, preferably of 5-75mol%, in the main chain and comprising constituting units of formulas I, III and IV (R2 is p-phenylene, p,p'-biphenylene, etc.), constituting units of formulas I, II and IV (R1 is p,p'-biphenylene, p-phenylene, 2,6-naphthalene, etc.) or constituting units of formulas I to TV, and further has 0.01-10% haze value. The transparent polyester film is obtained by melting and extruding the composition to form a sheet-like material, orienting the sheet-like material and heat setting the oriented material at 150-260 deg.C.
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公开(公告)号：JPH10130389A
公开(公告)日：1998-05-19
申请号：JP28385796
申请日：1996-10-25
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , KOTOURA MASAAKI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing polyphenylene sulfide film having good qualities with a high Young's modules and little surface defects, oligomers and uneven thickness by finding a liquid crystalline polymer having improving effects both in fluidity and mechanical characteristics. SOLUTION: This polyphenylene sulfide film consists of a polyphenylene surfide (A) and a liquid crystalline polymer (B) having 0.1-50 Pa.second melt viscosity. The polyphenylene sulfide film is produced by blending the polyphenylene sulfide (A) with the liquid crystalline polymer (B) having 0.1-50 Pa.second melt viscosity and bringing the mixture to form a film.
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公开(公告)号：JPH1080946A
公开(公告)日：1998-03-31
申请号：JP23813096
申请日：1996-09-09
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , TSUNEKAWA TETSUYA , KOTOURA MASAAKI
Abstract: PROBLEM TO BE SOLVED: To make it possible to uniformly stretch and mold polyester film even if there are temperature variations during stretching or molding by setting the dependence of stretching tension upon temperature measured within a range of stretching temperatures from the glass transition temperature to the cold crystallization temperature of the film, at a specific value during the stretching of the film. SOLUTION: The dependence of stretching tension upon temperature when polyester film with a birefrigence of 0.02 or less and a crystallinity of less than 20%, preferably, less than 10% is stretched, is set at 0.15(MPa/ deg.C) or less, preferably 0.10(MPa/ deg.C) or less, further preferably, 0.05(MPa/ deg.C) or less. Thus it is possible to perform the uniform stretching and molding of the film. The dependence of stretching tension upon temperature is set at the value (MPa/ deg.C) of a gradient sought by the least square method when a film thickness of 250μm, a preheating time of 60sec., a stretching rate of 20000%/min. and tension (MPa) to be applied when the film is stretched 3.5 times as much in the stretching direction at the time of fixed width uniaxial orientation are plotted to each of stretching temperatures ( deg.C).
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