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公开(公告)号：JP2000072897A
公开(公告)日：2000-03-07
申请号：JP24334798
申请日：1998-08-28
Applicant: TORAY INDUSTRIES
Inventor： TOUDAIJI TAKUJI , HOSOKAWA HIROBUMI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To prepare a biaxially oriented polyimide film having excellent melt- formability and drawing property, exhibiting excellent mechanical properties such as Young's modulus, having little defects such as thickness unevenness of the film and high quality and useful for magnetic recording medium, electrical insulation or the like, by constituting the film with a resin containing a specific polyimide. SOLUTION: The objective film is composed of a resin containing >=70 wt.% of a polyimide containing a structure unit of the formula [X is a (substituted) aliphatic hydrocarbon group or the like] and having a glass transition temperature of preferably 100-400 deg.C. The sum of the Young's moduli in longitudinal direction and lateral direction of the film is preferably 10-30 (GPa). The above polyimide can be produced by the dehydrative condensation of a tetracarboxylic acid and/or its acid anhydride comprising bis(3,4-dicarboxyphenyl)sulfone with a (substituted)aliphatic primary diamine and/or a (substituted)aromatic primary diamine (e.g. 2-aminodiphenylpropane) or the like.
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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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公开(公告)号：JPH11138629A
公开(公告)日：1999-05-25
申请号：JP31898997
申请日：1997-11-05
Applicant: TORAY INDUSTRIES
Inventor： ASAKURA MASAYOSHI , EGASHIRA KENICHI , TSUNEKAWA TETSUYA
IPC: B41N1/24 , B29C55/16 , B29K67/00 , B29L7/00 , B29L9/00 , B41M5/382 , B41M5/40 , B41M5/41 , C08J5/18
Abstract: PROBLEM TO BE SOLVED: To provide a film which is free from its stretching break and can be stretched at an area stretching magnification over a wide range of temperature, and further, shows high strength, wear resistance, dimensional stability and superb antistretching properties as well as a method for manufacturing the film. SOLUTION: This method for manufacturing a biaxially stretched polyester film includes a first-stage stretching step to concurrently biaxially stretch an unstretched cast film in the longitudinal and the crosswise direction at an area stretching magnification of 2-7 times within the temperature range of (glass transition temperature Tg+25) deg.C-(Tg+45) deg.C and a second-stage stretching step to concurrently biaxially stretch the cast film in the longitudinal and the crosswise direction at an area stretching magnification of 4-20 times within the temperature range of (Tg-15) deg.C-(Tg+10) deg.C following the first-stage stretching step. In addition, at least, either of the ratio R1 (IMD/ IND) of peak intensity (IMD, IND) in the longitudinal and the thickness direction or the ratio R2 (ITD/IND) of peak intensity (ITD/IND) in the crosswise and the thickness direction as measured by the laser Raman scattering method is 6 or more as the characteristics of this biaxially stretched polyester film.
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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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Patent Agency Ranking
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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67.发明专利
公开(公告)号：JPH10140457A
公开(公告)日：1998-05-26
申请号：JP29883296
申请日：1996-11-11
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , YAMAUCHI HIDEYUKI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To obtain a nonwoven fabric composite product suitable for stencil paper for highly sensitive heat-sensitive mimeograph by integrally laminating a nonwoven fabric comprising fibrous raw materials containing a specific liquid crystal polyester to the same or different kind of polyester film. SOLUTION: Fibrous raw materials having an average fiber diameter of =0.52 and a birefringence of
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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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