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公开(公告)号：JP2580944B2
公开(公告)日：1997-02-12
申请号：JP7094693
申请日：1993-03-05
Applicant: TORAY INDUSTRIES
Inventor： FURUKAWA KEIICHI , KIMURA MASAHIRO , TSUNASHIMA KENJI
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公开(公告)号：JPH08156182A
公开(公告)日：1996-06-18
申请号：JP29985594
申请日：1994-12-02
Applicant: TORAY INDUSTRIES
Inventor： KIMURA MASAHIRO , OSHIMA KATSUNORI
IPC: B32B15/08 , B32B15/09 , B32B25/08 , B32B27/36 , C08G63/672
Abstract: PURPOSE: To obtain a biaxially stretched laminated film excellent in impact resistance and taste characteristics and suitable for processing by specifying the internal haze per specific length of a laminated film consisting of an A-layer of polyester A based on ethylene terephthalate or ethylene isophthalate with a specific m.p. and a B-layer consisting of polyester B and a thermoplastic elastomer. CONSTITUTION: In a biaxially stretched laminated film for laminating a metal panel consisting of an A-layer composed of polyester A containing ethylene terephthalate or isophthalate with an m.p. of 160-245 deg.C as a main constitutional component and a B-layer wherein polyester B with an m.p. of 140-245 deg.C and a thermoplastic elastomer are compounded, the internal haze per 25μm of the film is 1-75% and the heat shrinkage factor thereof under a 120 deg.C×30-min condition is 5% or less. Since no gap is generated between polyester and the thermoplastic elastomer at the time of stretching when the internal haze of the laminated film is 1-75%, impact resistance is markedly enhanced.
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公开(公告)号：JPH07207039A
公开(公告)日：1995-08-08
申请号：JP87494
申请日：1994-01-10
Applicant: TORAY INDUSTRIES
Inventor： KIMURA MASAHIRO , YAMAUCHI HIDEYUKI , IMAI SHIRO
IPC: C08J5/18 , B29C55/02 , B29K67/00 , B29L9/00 , B32B15/08 , B32B15/09 , B32B27/18 , B32B27/20 , B32B27/36 , C08K5/05 , C08L67/00 , C08L67/02
Abstract: PURPOSE:To obtain a polyester film for lamination with a metallic sheet excelling in adhesion, formability, heat resistance, impact resistance and taste characteristics and desirably used for processing a metallic can by laminating a specified polyester film having a specified melting point with a common polyester film. CONSTITUTION:This film is one having a melting point of 120-260 deg.C and containing 0.01-1wt.% diethylene glycol component and 0.001-1wt.% antioxidant. A film prepared by laminating this film (A) with a polyester film (B) mainly consisting of a polyester of a melting point of 231-260 deg.C is preferable in respect that layer A has a function of improving the adhesion to a metallic sheet, and layer B has a function of preventing the inside surface of the can from being damaged by the holder used in baking the can itself after being made. It is desirable from the viewpoint of the taste characteristics that layer B is substantially free from any antioxidant.
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公开(公告)号：JPH07205383A
公开(公告)日：1995-08-08
申请号：JP530494
申请日：1994-01-21
Applicant: TORAY INDUSTRIES
Inventor： KIMURA MASAHIRO , IMAI SHIRO , TSUNASHIMA KENJI
Abstract: PURPOSE:To provide a polyester film excellent in adhesiveness, impact resistance and taste characteristics and having excellent impact resistance even after heat treatment, especially, such as dry baking or retorting and suitably adapted to a metal can be produced by molding processing. CONSTITUTION:A polyester film is obtained by laminating a B-layer composed of polyester (III) based on polybutylene terephthalate with an m.p. of 231-260 deg.C to an A-layer composed of a mixture consisting of polyester (I) based on polyethylene terephthalate with an m.p. of 150-230 deg.C and polyester (II) based on polybutylene terephthalate with an m.p. of 120-225 deg.C on a wt. basis of 50:50-95:5 and has the coefficient of surface orientation of 0.05 or less.
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公开(公告)号：JPH0716920A
公开(公告)日：1995-01-20
申请号：JP16690493
申请日：1993-07-06
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , TOYODA KATSUYA , KIMURA MASAHIRO
Abstract: PURPOSE:To enable even any crystalline polymer to be stably successively biaxially orientated by a method wherein a degree of crystallization of a polymer film prior to orientation is specified. CONSTITUTION:When a film consisting of crystalline polymer is successively orientated biaxially such as in a length direction and a width direction, a degree of crystallization of a film consisting of polymer prior to orientation is made under 15%. The crystalline polymer means a polymer which can be crystallized by heating, and should preferably be polyamide, polybutylene terephthalate, polyhexamethylene terephthalate, polyoxymethylene, and copolymer thereof. In order to obtain a good plainness film of under 10% in degree of crystallization, a combined method of electrostatic impression and contact casting using surface tension of water is especially preferable.
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Patent Agency Ranking
公开(公告)号：JPH06255058A
公开(公告)日：1994-09-13
申请号：JP7094693
申请日：1993-03-05
Applicant: TORAY INDUSTRIES
Inventor： FURUKAWA KEIICHI , KIMURA MASAHIRO , TSUNASHIMA KENJI
Abstract: PURPOSE:To provide excellent processability and to extremely reduce change of an external appearance due to a sunlight after processing by setting yellowing after irradiating by the use of a mercury lamp for a specific time to a specific value in a laminated film laminated with polyester containing specific ingredient and heat sealable polyester and having substantially no orientation. CONSTITUTION:A polyester A containing 5-30mol% of long chain aliphatic dicarboxylic acid group having 15C or less alkylene group as acid ingredient and 80mol% of diol ingredient as constituent containing mainly 1,4-butanediol residue, and a heat sealable polyester B containing 5-30mol% of long chain aliphatic dicarboxylate residue having 16C or more alkylene group as acid ingredient, 80mol% of diol ingredient as constituent containing mainly 1,4- butanediol residue are laminated. The polyester laminated film is substantially a film having no orientation, and not particularly oriented. Thickness ratio, laminated structure of the polyesters A, B are so set that yellowing after it is irradiated by the use of a mercury lamp for 100 hours is set to 3.0 or less.
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公开(公告)号：JPH06234868A
公开(公告)日：1994-08-23
申请号：JP2110793
申请日：1993-02-09
Applicant: TORAY INDUSTRIES
Inventor： YAMAUCHI HIDEYUKI , KIMURA MASAHIRO , TSUNASHIMA KENJI
Abstract: PURPOSE:To obtain a polyester film for forming a specific optical density and excellent formability, masking power, whiteness, etc., and useful as tray, blister, etc., for medical, general purpose and food use, etc., by laminating a thermoplastic polyester containing a colorant to a surface of the base film. CONSTITUTION:(A) A thermoplastic polyester such as polybutylene terephthalate and (B) a thermoplastic polyester such as polyethylene terephthalate containing 10wt.% of a colorant such as titanium oxide having an average particle diameter of 0.2mum are melted and extruded with separate extruders at 250 deg.C for the component A and 280 deg.C for the component B. The extrudates are laminated one upon another in a feed block and extruded in the form of a molten film having an A/B/A structure through a T-die. The extruded film is solidified by cooling on a casting drum maintained at 25 deg.C, made to contact with a hot roll of 50 deg.C and wound to obtain the objective forming polyester film having an optical density of >=0.3 and exhibiting excellent formability, masking power, whiteness, etc.
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公开(公告)号：JPH06218875A
公开(公告)日：1994-08-09
申请号：JP1253493
申请日：1993-01-28
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , KIMURA MASAHIRO , YAMAUCHI HIDEYUKI
IPC: B21D22/20 , B32B15/08 , B32B15/088
Abstract: PURPOSE:To improve adhesiveness, moldability and impact resistance and to prevent the deterioration of the taste of content at the time of use as a molded can by coating at least the single surface of a steel panel with a polyamide film before molding the steel panel. CONSTITUTION:A steel panel molded object is obtained by coating at least the single surface of a steel panel with a polyamide film and subsequently molding the coated steel panel. The polyamide film pref. has relative viscosity etar of 2.5 or more, an m.p. of 180-235 deg.C and a thickness of 5-250mum. The polyamide film is pref., applied to the steel panel by bonding the polyamide film to the steel panel under heating and pressure by utilizing heat adhesiveness. The coated steel panel thus obtained is subjected to drawing, squeezing molding or drawing/squeezing molding using a jig such as a punch or a die. By this method a laminated steel panel excellent in the adhesion with the steel panel, moldability and impact resistance is obtained.
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公开(公告)号：JPH06190969A
公开(公告)日：1994-07-12
申请号：JP4612493
申请日：1993-02-12
Applicant: TORAY INDUSTRIES
Inventor： KIMURA MASAHIRO , TAKAHASHI KOZO , KASHIWAKURA NAOTAKE
Abstract: PURPOSE:To provide the polyester film having characteristics such as impact resistance, pinhole resistance or the like a biaxially stretched nylon film not possessed by an original polyester film and also having gas barrier properties. CONSTITUTION:A membrane laminated flexible polyester film is obtained by laminating a membrane composed of a metal or a metal compd. to at least the single surface of a biaxially oriented polyester film with Young's modulus of 10-250kg/mm and thrust strength of 10kg/mm or more.
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公开(公告)号：JPH0657112A
公开(公告)日：1994-03-01
申请号：JP21513892
申请日：1992-08-12
Applicant: TORAY INDUSTRIES
Inventor： KIMURA MASAHIRO , AOYAMA MASATOSHI , SUZUKI MASARU
Abstract: PURPOSE:To obtain the polyester composition which gives a film excellent in resistance to abrasion and magnetic-layer surface marring during high-speed running by incorporating highly crosslinked polymer particles having a specific hardness. CONSTITUTION:This polyester composition contains particles of a crosslinked polymer having a degree of crosslinking of 60wt.% or higher which have a 10%-deformation strength (S10) satisfying the equation 3kgf/mm . Due to the specific hardness and a high degree of crosslinking, the particles have an excellent affinity for the polyester. When this composition is used in, e.g. a magnetic tape and an external force is applied to the tape during high-speed running, the particles are less apt to fall off, causing no dust generation. The particles are also less apt to mar the magnetic-layer surface. Hence, the equipment and atmosphere for film production can be prevented from being fouled. The composition is particularly suited for use in a magnetic tape, etc.
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