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公开(公告)号：JP2520415B2
公开(公告)日：1996-07-31
申请号：JP6985587
申请日：1987-03-24
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATOSHI , ABE KOICHI , OKASAKA HIDESADA
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公开(公告)号：JPH07323512A
公开(公告)日：1995-12-12
申请号：JP12127694
申请日：1994-06-02
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , SASAKI TOSHIHIRO , OKASAKA HIDESADA
Abstract: PURPOSE:To obtain a film improved in surface flatness and cutting resistance and having uniform thickness by adding a metal element and phosphorus element represented by a specific formula to polyester constituting an auxiliary layer and setting a crystallization parameter defined by a separate specific formula to specific temp. or lower and making the same smaller than that of main layer polyester. CONSTITUTION:It is necessary to add a metal element (M) and a phosphorus element (P) to polyester constituting an auxiliary layer so as to satisfy formulae 0.1 g of polyester. In the constitution of DELTATcg=Tc-Tg (wherein Tc is crystallization temp. of polyester and Tg is glass transition temp. of polyester), the crystallization parameter DELTATcg of the auxiliary layer polyester is 70 deg.C or lower and smaller than the crystallization parameter Tcg of the main layer polyester. When M, M/P and DELTATcg are within prescribed ranges, a film good in surface roughness and cutting resistance and having uniform thickness is obtained.
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公开(公告)号：JPH07286094A
公开(公告)日：1995-10-31
申请号：JP8203694
申请日：1994-04-20
Applicant: TORAY INDUSTRIES
Inventor： SASAKI TOSHIHIRO , MORITA TORU , OKASAKA HIDESADA
IPC: C07C31/20 , C08G63/181 , C08K5/42 , C08L67/00 , C08L67/02
Abstract: PURPOSE:To obtain a glycol slurry for a polyester additive which has high softening point and gives a polyester formed article excellent in transparency, antistatic properties and abrasion resistance when formed into film or fiber. CONSTITUTION:This slurry contains 1-70wt.% metal sulfonate derivative represented by the formula R(X)nSO3M (wherein R is 5-30C alkyl; X is an aromatic group; n is 0, 1 or 2; and M is an alkali metal or alkaline earth metal element) and has a pH (hydrogen ion concentration) of 10 or higher.
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公开(公告)号：JPH07238211A
公开(公告)日：1995-09-12
申请号：JP32656792
申请日：1992-12-07
Applicant: TORAY INDUSTRIES
Inventor： SHIMIZU YUZO , SUZUKI MASARU , OKASAKA HIDESADA
Abstract: PURPOSE:To obtain a polyester composition having surface protrusions with uniform height, capable of providing a high-performance magnetic tape having excellent electromagnetic conversion characteristics and sliding properties calender processing properties free from removal of particles and drop-out in the case of use as a substrate. CONSTITUTION:A polyester which is obtained by reacting a dicarboxylic acid or its ester forming derivative with ethylene glycol is blended with silicon dioxide particles which are prepared by substituting a water dispersion sol of silicon dioxide particles having 5-500mmu average particle diameter with ethylene glycol and other inorganic particles to give a polyester composition and a biaxially orientated film.
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公开(公告)号：JPH07238152A
公开(公告)日：1995-09-12
申请号：JP3043294
申请日：1994-02-28
Applicant: TORAY INDUSTRIES
Inventor： OKASAKA HIDESADA , MORITA TORU , AOYAMA MASATOSHI
IPC: C08J5/18 , C08G63/189 , C08G63/78
Abstract: PURPOSE:To produce a polyethylene naphthalate film free from surface defects and reduced in unevenness of thickness by molding a polyethylene naphthalate obtained by continuously polycondensing bis(hydroxyethyl) naphthalate into a film. CONSTITUTION:Bis(hydroxyethyl) naphthalate obtained by the transesterification or esterification of naphthalenedicarboxylic acid with ethylene glycol is continuously polycondensed at 230-310 deg.C in a vacuum to obtain polyethylene naphthalate having an intrinsic viscosity of 0.5-0.8 and a terminal carboxyl concentration of 45 equivalents/10 g or below. This polyethylene naphthalate is melt-extruded at 290-320 deg.C, and the extrudate is cooled with a cooling roll to obtain an unoriented film. This film is stretched in the machine and transverse directions at a stretch ratio of 3-10 for each direction, optionally stretched again in the machine direction at a stretch ratio of 1-3, and then heat-treated at 190-230 deg.C to obtain a polyethylene naphthalate having an average height of surface protrusions of 5-400nm.
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Patent Agency Ranking
公开(公告)号：JPH07138459A
公开(公告)日：1995-05-30
申请号：JP28800593
申请日：1993-11-17
Applicant: TORAY INDUSTRIES
Inventor： OKASAKA HIDESADA , MORITA TORU , SASAKI TOSHIHIRO
Abstract: PURPOSE:To obtain a polyester composition containing Al2O3-ZrO2 composite oxide particles, having excellent abrasion resistance, transportability and durability and useful as a biaxially drawn film, especially as a substrate for magnetic recording tape. CONSTITUTION:This polyester composition contains Al2O3-ZrO2 composite oxide particles produced e.g. by evaporating AlCl3 and ZrCl4, introducing the compounds into an oxyhydrogen flame using nitrogen gas as a carrier and reacting the compounds in the flame. The ratios of Al2O3 and ZrO2 in the composite oxide particle are preferably 10-90wt.% for Al2O3 and preferably 90-10wt.%, more preferably 80-20wt.%, especially 70-30wt.% for ZrO2. The average particle diameter of the temporary particles of the composite oxide particles is preferably 10-500nm, more preferably 20-300nm, especially 30-200nm. The amount of the composite oxide particle to be added to the polyester is preferably 0.01-5wt.%.
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公开(公告)号：JPH07117199A
公开(公告)日：1995-05-09
申请号：JP26522693
申请日：1993-10-22
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , SASAKI TOSHIHIRO , OKASAKA HIDESADA
Abstract: PURPOSE:To provide a biaxially oriented laminated film having abrasion resistance, an antistatic and traveling property, evenness, and heat stability. CONSTITUTION:The biaxially oriented laminated film is such that polyester forming a surface layer (secondary layer) contains an organic sulfonic metal acid of 0.1-10wt.% and insoluble particles of 0.01-10wt.% relative to polyester, and the thickness of the secondary layer is to 0.005-5mum. In this way, there are achieved good characteristics such as abrasion resistance, an antistatic and traveling property, evenness, and heat stability, and it is suitably used in the field of a magnetic medium, in particular, of a magnetic tape base film or the like.
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公开(公告)号：JPH06166747A
公开(公告)日：1994-06-14
申请号：JP32176192
申请日：1992-12-01
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , OKASAKA HIDESADA
Abstract: PURPOSE:To carry out the depolymerization of an aromatic polyester and obtain a depolymerized aromatic polyester having high quality in high productivity at a low cost by adding an aromatic polyester to a specific reaction system, depolymerizing the aromatic polyester under specific conditions and supplying the produced aromatic dicarboxylate, etc., to a polymerization reaction system. CONSTITUTION:A reaction system containing an aromatic dicarboxylate and its oligomer is incorporated with an aromatic polyester, depolymerized at 200-250 deg.C, incorporated with an alkylene glycol in an amount of 0.5-5.0mol based on 1mol of the acid component constituting the aromatic polyester added to the system and further depolymerized at 200-250 deg.C. A part of the obtained aromatic dicarboxylic acid and its oligomer is supplied to a polymerization reaction system to perform the depolymerization of the aromatic polyester.
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公开(公告)号：JPH0680771A
公开(公告)日：1994-03-22
申请号：JP23675092
申请日：1992-09-04
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , OKASAKA HIDESADA
Abstract: PURPOSE:To obtain an arom. polyester which contains well dispersed precipitated particles in an amt. larger than that of precipitated particles contained originally in the polyester by depolymerizing an arom. polyester contg. specific precipitated particles with an alkylene glycol under specified conditions and polycondensing the resulting depolymerizate under specified conditions. CONSTITUTION:An arom. polyester contg. 0.005-10.0wt.% precipitated particles contg. at least one alkali or alkaline earth metal element (e.g. Ca) as the constituent is depolymerized with an alkylene glycol (e.g. ethylene glycol) in an amt. of 0.5-10.0mol based on 1mol of the acid component constituting the polyester (e.g. terephthalic acid), and the resulting depolymerizate comprising a glycol ester of an arom. dicarboxylic acid and its low polymer is polycondensed in the presence of a polycondensation catalyst (e.g. Sb2O3).
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公开(公告)号：JPH0616595A
公开(公告)日：1994-01-25
申请号：JP17534792
申请日：1992-07-02
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , OKASAKA HIDESADA
Abstract: PURPOSE:To accomplish the efficient recovery of an aromatic dicarboxylic lower alkyl ester with cleanness by treating the ester containing insoluble particles using a specific centrifugal separator under specified conditions to eliminate the particles economically in high accuracy. CONSTITUTION:An aromatic dicarboxylic lower alkyl ester containing insoluble particles (hereafter, referred to as insoluble particle-contg. ester) is fed, in a melt state, into a centrifugal separator equipped with plural discs therein within the temperature range satisfying the relationship: mp to 2X10 G. For the centrifugal separator, a De Laval centrifugal separator equipped with a treatment liquor inlet 1, discs 4, a cleaned liquor outlet and a solid discharge valve 5 is preferable. And, for the ester as feedstock, e.g. a compound produced by reaction of an aromatic polyester with an excess of a monohydric alcohol at 150-250 deg.C is used.
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