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1. 发明专利

JPH04309522A PRODUCTION OF POLYESTER 失效
公开(公告)号：JPH04309522A
公开(公告)日：1992-11-02
申请号：JP7513791
申请日：1991-04-08
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： MURASHIGE RYUICHI , MATSUMOTO HARUO , NISHINO YASUHIRO , NAKAMURA KOICHIRO , KUZE KATSURO
IPC分类号： C08G63/78 , C08J3/20 , C08J5/18
摘要： PURPOSE:To produce a polyester which is improved in the dispersion of inert particles, can give a fiber or a film without frequently encountering filter clogging, yarn breakage or film breakage, can give a film having a low content of fish eyes, and can give a magnetic tape which rarely suffers from drop-out of magnetic recording signals. CONSTITUTION:A mixture containing a reaction product obtained by reacting polyester-forming components and inert particles is subjected to shearing treatment in a high-shear disperser to disperse the inert particles in the reaction product.

2. 发明专利

JPH041235A BIAXIALLY ORIENTED POLYESTER FILM 失效
公开(公告)号：JPH041235A
公开(公告)日：1992-01-06
申请号：JP10146090
申请日：1990-04-17
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： MATSUMOTO HARUO , MURASHIGE RYUICHI , OHASHI HIDETO , KUZE KATSURO
IPC分类号： C08J5/18 , B29C55/12 , B29K67/00 , B29L7/00 , C08K3/22 , C08K7/16 , C08K9/04 , C08L67/00 , C08L67/02
摘要： PURPOSE:To obtain a biaxially oriented film which is smooth and highly excellent in abrasion resistance and slidability by adding an aggregated aluminum oxide having a specified primary particle diameter and a specified secondary particle diameter to a biaxially oriented polyester film. CONSTITUTION:A biaxially oriented polyester film containing 0.01-2wt.% aggregated aluminum oxide having a primary particle diameter of 0.1mum or below and a secondary particle diameter of 0.1-3mum. Desirably, the film wherein the aggregated aluminum oxide comprises at least 80wt.% aggregated aluminum oxide having a gamma-crystal structure. More desirably, the film wherein the aggregated aluminum oxide is treated with 0.1-5wt.%, based on the aggregated aluminum oxide, compound of the formula and/or copolymer thereof and/or their mixture. In the formula, X is H or 1-3C alkyl; Y is a carboxylic acid and/or its salt or ester; and n is selected so that the mol.wt. may fall in the range of 2000-100000.

3. 发明专利

JPS63286439A ORIENTED POLYESTER FILM 失效
公开(公告)号：JPS63286439A
公开(公告)日：1988-11-24
申请号：JP12158487
申请日：1987-05-19
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： NISHINO YASUHIRO , MATSUYAMA YUJIRO , KUZE KATSURO , MURASHIGE RYUICHI , MAKIMURA OSAMU
IPC分类号： B29C55/02 , B29K67/00 , B29L7/00 , C08J5/18 , C08K7/08 , C08L67/00 , C08L67/02 , G11B5/73 , G11B5/733
摘要： PURPOSE:To obtain the titled film leading to magnetic tape substrate which is excellent in slipperiness and wear resistance with small number of coarse asperities, by incorporating a polyester with a combination of each specific two kinds of calcium carbonate particles. CONSTITUTION:The objective film can be obtained by incorporating a polyester constituted by ethylene terephthalate as the chief recurring unit with (A) calcium carbonate particles having an average size of 0.5-2.0mum with area rate to circumscribed circle given by equation: (said area rate)=(projected sectional area of a particle)/(area of the circumscribed circle for the particle)X100 being >=60% and (B) other calcium carbonate particles having an average size 0.2-1.5mum with the size smaller than that of the particles A (the difference being >=0.3mum) and the area rate defined above being

4. 发明专利

JPH0439336A ORIENTED POLYESTER FILM 失效
公开(公告)号：JPH0439336A
公开(公告)日：1992-02-10
申请号：JP14504190
申请日：1990-06-01
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： KUZE KATSURO , MATSUMOTO HARUO , MURASHIGE RYUICHI
IPC分类号： C08J5/18 , B29C55/02 , B29K67/00 , B29L7/00 , C08F16/14 , C08F16/16 , C08F216/14 , C08F216/16 , C08K9/04 , C08L67/00 , C08L67/02
摘要： PURPOSE:To obtain an oriented polyester film resistant to the peeling at the interface between a filler particle and polyester and having excellent transparency, slipperiness, etc., by compounding an inert inorganic particle treated with a copolymer of a (meth)acrylic acid monomer and an allyl ether monomer having a specific structure. CONSTITUTION:A polyester (e.g. polyethylene terephthalate) is compounded with 0.005-3wt.% (preferably 0.01-1wt.%) of an inert inorganic particle (e.g. Ca or Mg) treated with a copolymer of a (meth)acrylic acid monomer of formula I (R is H, methyl or hydroxyethyl; X is H, univalent metal, bivalent metal, ammonium or organic amine) and an allyl ether monomer of formula II (p is 1-4; q and r are 0.1-100; R and R are 2-4C alkylene; Y and Z are OH, 1-4C alkoxy, univalent phosphoric acid group or together form bivalent phosphoric acid group, bivalent sulfonic acid group, etc.).

5. 发明专利

JPH02178333A HIGHLY SLIPPERY POLYESTER FILM 失效
公开(公告)号：JPH02178333A
公开(公告)日：1990-07-11
申请号：JP33420088
申请日：1988-12-29
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： NISHINO YASUHIRO , MATSUYAMA YUJIRO , MATSUMOTO HARUO , MURASHIGE RYUICHI , NAKAMURA KOICHIRO , KUZE KATSURO
IPC分类号： C08J5/18 , C08K9/04 , C08L67/00 , C08L67/02
摘要： PURPOSE:To obtain the title polyethylene terephthalate-based film excellent in slipperiness, wear resistance and travelableness and having small number of coarse asperities by homogeneously incorporating a base film with a small amount of fine calcium carbonate surface treated with a polyether-based acrylic copolymer salt. CONSTITUTION:The objective film can be obtained by homogeneously incorporating a base film, a polyester film made up of ethylene terephthalate as the main recurring unit with 0.01-0.50 (pref. 0.10-0.30)wt.% of calcium carbonate 0.1-2.0 (pref. 0.3-1.2)mum in average granular size, surface treated with a polyether-based acrylic copolymer salt (e.g. partially neutralized salt of a copolymer from alpha,beta- monoethylenic unsaturated carboxylic acid and alpha,beta-monoethylenic unsaturated carboxylic ester).

6. 发明专利

JPH03182523A PRODUCTION OF POLYESTER 失效
公开(公告)号：JPH03182523A
公开(公告)日：1991-08-08
申请号：JP32329289
申请日：1989-12-12
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： MATSUMOTO HARUO , NISHINO YASUHIRO , MURASHIGE RYUICHI , NAKAMURA KOICHIRO , KUZE KATSURO
IPC分类号： C08G63/78
摘要： PURPOSE:To obtain a polyester excellent in productivity in forming films and slidability, having a low content of coarse particles and being useful as a base film for magnetic tapes by adding a specified amount of colloidal SiO2 and a specified amount of an alkali metal hydroxide to the reaction system before the completion of the precondensation reaction in the production of an aromatic polyester. CONSTITUTION:Colloidal silicon oxide (A) (of a mean particle diameter

7. 发明专利

JPS63234039A ORIENTED POLYESTER FILM 失效
公开(公告)号：JPS63234039A
公开(公告)日：1988-09-29
申请号：JP6973587
申请日：1987-03-23
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： KUZE KATSURO , MATSUYAMA YUJIRO , HAMANO AKITO , MURASHIGE RYUICHI , MAKIMURA OSAMU
IPC分类号： C08J5/18 , B29C55/02 , B29K67/00 , B29L7/00 , C08K3/26 , C08K7/08 , C08L67/00 , C08L67/02 , G11B5/73 , G11B5/733
摘要： PURPOSE:To obtain the titled film containing little coarse particles and having excellent processability and running durability, by adding calcium carbonate containing a specific amount of P atom. as a lubricant. CONSTITUTION:The objective polyester film contains 0.005-1.0wt.% synthetic calcium carbonate having an average particle diameter of 0.05-5.0mum and containing 0.01-2wt.% P atom. The above calcium carbonate preferably has an areal ratio to the circumscribed circle of 60-100% defined by the formula and determined by the observation with scanning electron microscope.

8. 发明专利

JPH0570612A BIAXIALLY ORIENTATED POLYESTER FILM 失效
公开(公告)号：JPH0570612A
公开(公告)日：1993-03-23
申请号：JP26271191
申请日：1991-09-12
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： MATSUMOTO HARUO , MURASHIGE RYUICHI , KONAGAYA JUJI
IPC分类号： B29C55/12 , B29K67/00 , B29K105/16 , B29L7/00 , C08J5/18 , C08K3/20 , C08K3/36 , C08L67/00
摘要： PURPOSE:To obtain the title film useful as a high-quality magnetic tape, etc., having excellent slipperiness and smoothness, not causing wrinkle during production, having a few drop outs and scratches, comprising spherical fine particles having specific particle diameters and inert particles having a specific Mohs hardness. CONSTITUTION:Terephthalic acid and ethylene glycol are fed to an esterification reactor, a catalytic amount of antimony trioxide and magnesium acetate tetrahydrate are added to the reactor. The mixture is mixed with two kinds of fine particles comprising 0.05-0.50wt.% spherical silica fine particles having 0.15-0.45mu average particle diameters and 0.01-0.40wt.% inert particles (e.g. synthetic calcium carbonate) having 0.20-0.50mu average particle diameter and,$6.5 Mohs hardness satisfying a condition of formula B-A>=0.05mum wherein A is average particle diameter of the spherical silica fine particles and B is average particle diameter of the inert particles. The resulting substance is heated and subjected to polycondensation while stirring, a formed polyester is melted and molded into a sheetlike state, biaxially orientated and heat-treated to give the objective biaxially orientated polyester film having excellent slipperiness and smoothness.

9. 发明专利

JPH04126729A BIAXIALLY ORIENTED POLYESTER FILM 失效
公开(公告)号：JPH04126729A
公开(公告)日：1992-04-27
申请号：JP24961490
申请日：1990-09-18
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： MATSUMOTO HARUO , MURASHIGE RYUICHI , KONAGAYA JUJI
IPC分类号： C08J5/18 , B29C55/12 , B29K67/00 , B29L7/00 , C08K3/22 , C08K3/36 , C08L67/00 , C08L67/02
摘要： PURPOSE:To obtain the subject film useful for a magnetic tape, etc., having excellent transparency and smoothness containing a specific amount of colloidal silica containing a specific amount of alkali-metallic compound. CONSTITUTION:The aimed film contains 0.01-2wt.% colloidal silica (averaged particle diameter is preferably 0.15-1mum) containing 0.004-0.02mol, preferably 0.006-0.016mol alkali-metallic compound calculated as an alkali-metallic oxide (M2O) per 100g colloidal silica.

10. 发明专利

JPH0433920A PRODUCTION OF POLYESTER 失效
公开(公告)号：JPH0433920A
公开(公告)日：1992-02-05
申请号：JP14213390
申请日：1990-05-30
申请人： TOYO BOSEKI , NIPPON MAGPHANE KK
发明人： MATSUMOTO HARUO , MURASHIGE RYUICHI , OHASHI HIDETO , KUZE KATSURO
IPC分类号： C08J5/18 , C08G63/183 , C08G63/78 , C08K7/16 , C08K9/04 , C08L67/00 , C08L67/02
摘要： PURPOSE:To obtain the subject polymer having low content of coarse particles and excellent transparency and abrasion resistance by adding a mixture of an inert inorganic particle and a specific polymeric compound in the reaction stage of ethylene terephthalate and carrying out the polymerization. CONSTITUTION:The objective polymer can be produced by dispersing (A) inert inorganic particles having an average particle diameter of 0.1-3.0 mum in a dispers ing medium such a ethylene glycol to obtain a slurry, compounding the slurry with 0.1-5 wt.% (based on the component A) of (B) a polymeric compound of formula [X is H or 1-3C alkyl; Y is carboxylic acid (salt), etc.; n is umber to get a molecular weight of 2,000-100,000], reacting the obtained mixture with (C) ethylene terephthalate, adding the reaction product to a polymerization system at a stage before the intrinsic viscosity of the polymer reaches 0.2 and further continuing the polymerization.

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