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公开(公告)号：JPH11302520A
公开(公告)日：1999-11-02
申请号：JP11553398
申请日：1998-04-24
Applicant: TORAY INDUSTRIES
Inventor： ODAJIMA AKIO , FUJITA AKIHARU , HIRAYAMA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To obtain the subject composition having excellent laminating properties, wear resistance during drawing/wiping molding and processing and adhesiveness to a steel plate after retort, by adding cohesive silicas having different average particle diameters to a polyester comprising an aromatic dicarboxylic acid and glycol as constituent components. SOLUTION: This polyester composition comprises (A) a polyester (e.g. polyethylene terephthalate or the like) comprising an aromatic dicarboxylic acid and glycol as main constituent components and (B) (i) a cohesive silica having 5-50 nm primary particle diameter and 0.01-2.0 average particle diameter and (ii) a cohesive silica having 0.05-5.0 average particle diameter. Preferably the amount of the component (B) (i) is 0.01-3 wt.% based on the component A and that of the component (B) (ii) is 0.005-2 wt.%. The component (B) (i) is obtained, for example, by a method for a thermal decomposition method of a silicon halide, etc., and the component (B) (ii) is obtained by a method for decomposing sodium silicate with an acid, etc. Preferably both the components B have 1.0-8.0 cm /g pare volume.
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公开(公告)号：JPH0940850A
公开(公告)日：1997-02-10
申请号：JP19039995
申请日：1995-07-26
Applicant: TORAY INDUSTRIES
Inventor： ODAJIMA AKIO , HAYASHI GEN , OKAWA HIROMOTO
IPC: C08K3/22 , C08G63/181 , C08G63/78 , C08L67/00
Abstract: PROBLEM TO BE SOLVED: To obtain a polyester composition which particularly shows excellent abrasion resistance and durability, when it is used as a magnetic tape base by adding a slurry prepared by wet-treating 2 or more kinds of aluminum oxide particles different in their crystalline structure. SOLUTION: When polyester is produced using the acid components mainly containing aromatic dicarboxylic acids and the glycol components mainly containing aliphatic glycol, a slurry which is prepared by wet-dispersing two or more kinds of aluminum oxides different in their crystalline structure (suitably particles of 2 or more kinds of activated alumina selected from α-, γ-, δ-, θ-aluminum oxides) in a solvent (preferably the above-stated glycol component) using a phosphorus compound, preferably phosphoric acid, ammonia or a lower amine as a dispersant is added to the polyester at any optional stage. The aluminum oxide particles preferably have a specific surface area of 50-300m /g and the total pore volume of 0.2-1.5ml/g both according to the B.E.T. method.
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公开(公告)号：JPH08225717A
公开(公告)日：1996-09-03
申请号：JP31427595
申请日：1995-12-01
Applicant: TORAY INDUSTRIES
Inventor： HAYASHI GEN , ODAJIMA AKIO
Abstract: PURPOSE: To provide the subject composition containing organic polymer particles having a specific particle size distribution, exhibiting excellent slipperiness, free from generation of friction scratch and abraded dust, giving a film having small number of coarse protrusions on the surface and useful for a high-density magnetic recording medium, etc. CONSTITUTION: This polyester composition is produced by compounding (A) a polyester composed mainly of polyethylene terephthalate, polyethylene naphthalate, etc., with (B) organic polymer particles having a relative standard deviation of the particle diameter of =5 times the average diameter of =60%). The component B has an average particle diameter of preferably 0.01-2.0μm and the amount of the component B in the composition is preferably 0.01-10wt.%.
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公开(公告)号：JPH0836739A
公开(公告)日：1996-02-06
申请号：JP17126494
申请日：1994-07-22
Applicant: TORAY INDUSTRIES
Inventor： ITO KIYOHIKO , ODAJIMA AKIO , KIDA KATSUMI
Abstract: PURPOSE:To provide a film which excels in a dropout characteristic and travelling durability by using a polyester film which contains a specific quantity of spherical silica particles having a particle diameter within a specific range to make the surface orientation index satisfy a specific formula. CONSTITUTION:This polyester film contains 0.005 to 5.0wt.% of spherical silica particles in which the volume average particle diameter is 0.1 to 2.0mum, the relative standard deviation is 0.3 to 1.5 and the particle size distribution curve at the predetermined grade width shows single peak distribution. The surface orientation index F and DELTAN are set so as to simultaneously satisfy DELTA
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公开(公告)号：JPH0836738A
公开(公告)日：1996-02-06
申请号：JP17125994
申请日：1994-07-22
Applicant: TORAY INDUSTRIES
Inventor： ITO KIYOHIKO , ODAJIMA AKIO , KIDA KATSUMI
Abstract: PURPOSE:To provide a film which excels in a dropout characteristic and travelling durability by using a polyester film which contains a specific quantity of spherical silica particles having a particle diameter within a specific range to make the surface orientation index satisfy a specific formula. CONSTITUTION:This polyester film contains 0.005 to 5.0wt.% spherical silica particles in which the volume average particle diameter is 0.1 to 2.0mum, the relative standard deviation is 0.3 to 1.5 and the particle size distribution curve at the predetermined grade width shows single peak distribution. The surface orientation index F and DELTAN are set to simultaneously satisfy DELTAN
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Patent Agency Ranking
公开(公告)号：JPH07114726A
公开(公告)日：1995-05-02
申请号：JP26068593
申请日：1993-10-19
Applicant: TORAY INDUSTRIES
Inventor： ODAJIMA AKIO , ITO KIYOHIKO , KONDOU NORIKAZU
IPC: C08J5/18 , B29C55/12 , B29K67/00 , B29K105/16 , B32B27/36 , C08K3/36 , C08K7/16 , C08L67/00 , C08L67/02 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PURPOSE:To provide a polyester film excellent in running performance, running durability against repeated use, winding characteristics like a pancake and slitting characteristics and useful as a base film for a magnetic recording medium satisfying even the requirement of high image quality. CONSTITUTION:This polyester film contains 0.005-5.0wt.% spherical silica particles having 0.1-2.0mum volume average particle diameter and a relative standard deviation of >0.5 in polyester and further contains 0.005-5.0wt.% org. polymer particles having 0.1-2.0mum volume average particle diameter.
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公开(公告)号：JPH07114723A
公开(公告)日：1995-05-02
申请号：JP26026593
申请日：1993-10-18
Applicant: TORAY INDUSTRIES
Inventor： ITO KIYOHIKO , ODAJIMA AKIO , KIDA KATSUMI
IPC: C08J5/18 , B29C55/12 , B29K67/00 , B29K105/16 , B32B27/36 , C08K3/36 , C08L67/00 , C08L67/02 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PURPOSE:To obtain a polyester film excellent in running performance, running durability at the time of repeated use, winding characteristics like a pancake and slitting characteristics and useful as a base film for a magnetic recording medium satisfying even the requirement of high image quality. CONSTITUTION:This polyester film contains spherical silica particles having 0.1-2.0mum volume average particle diameter and a relative standard deviation of >0.5 in polyester and simultaneously satisfies inequalities DELTAN 1,413-8,327XF, -20DELTAN 12.5, wherein DELTAN=(NMD-NTD)X1,000, F=(NMD+NTD)/2-nz (where NMD is the refractive index of the film in the longitudinal direction, NTD is the refractive index of the film in the transverse direction and nz is the refractive index of the film in the thickness direction) and F-5(TD) is the value (F-5) in the transverse direction of the film.
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公开(公告)号：JPH02206645A
公开(公告)日：1990-08-16
申请号：JP2626689
申请日：1989-02-03
Applicant: TORAY INDUSTRIES
Inventor： SAEKI TOMOJI , ODAJIMA AKIO , SUZUKI MASARU
Abstract: PURPOSE:To obtain a polyester composition having excellent smoothness, readily slipping properties, transparency, abrasion resistance and electrical characteristic, good workability in molding and suitable for photoengraving film by blending a Polyester with organic high polymer fine granules coated with aluminum oxide or water-containing aluminum oxide. CONSTITUTION:The aimed composition obtained by blending a polyester composed of a bifunctional acid component (e.g. terephthalic acid or 2,6-naphthalene dicarboxylic acid) consisting essentially of an aromatic dicarboxylic acid and one or more glycol components (e.g. ethylene glycol) with organic high polymer granules [e.g. (crosslinked) polystyrene] coated with aluminum oxide or water- containing aluminum oxide and having 0.01-5mum, preferably 0.05-5mum average granule size at an amount of 0.001-10wt.%, preferably 0.01-1wt.%.
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公开(公告)号：JPH01304152A
公开(公告)日：1989-12-07
申请号：JP13475588
申请日：1988-05-31
Applicant: TORAY INDUSTRIES
Inventor： SAEKI TOMOJI , ODAJIMA AKIO , SUZUKI MASARU
Abstract: PURPOSE:To obtain a polyester composition suitable for, e.g., a film excellent in easy slidability and transparency by adding crosslinked PS particles having a specified heat decomposition temperature and inert inorganic particles to a polyester. CONSTITUTION:Crosslinked PS particles of a heat decomposition temperature >=380 deg.C and a mean particle diameter of 0.01-5mum and inert inorganic particles (e.g., wet process silica) of a mean particle diameter of 0.01-5mum are added to a polyester comprising a difunctional acid component based on an aromatic dicarboxylic acid (e.g., dimethyl terephthalate) and at least one glycol component (e.g., ethylene glycol). A polyester composition suitable for, e.g., a film excellent in easy slidability and transparency can be obtained.
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公开(公告)号：JPH01240558A
公开(公告)日：1989-09-26
申请号：JP6699688
申请日：1988-03-18
Applicant: TORAY INDUSTRIES
Inventor： SAEKI TOMOJI , ODAJIMA AKIO , SUZUKI MASARU
Abstract: PURPOSE:To obtain a polyester composition having excellent slipperiness and transparency and suitable for photographic use, plate-making, magnetic recording tape, etc., by compounding crosslinked polystyrene particles having specific heat-decomposition temperature and void ratio. CONSTITUTION:A polyester composed of a difunctional acid component composed mainly of an aromatic dicarboxylic acid (e.g., terephthalic acid) and one or more glycol components (e.g., ethylene glycol) is compounded with crosslinked polystyrene having a heat-decomposition temperature of >=380 deg.C, preferably >=410 deg.C, a void ratio of 40-95%, preferably 50-80% and an average particle diameter of 0.01-5mum, preferably 0.05-2mum.
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