公开(公告)号：JPH08109319A

公开(公告)日：1996-04-30

申请号：JP24772594

申请日：1994-10-13

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  KOJIMA HIROJI ,  SUZUKI MASARU

IPC: C08J5/18 ,  B29C55/02 ,  B32B27/36 ,  C08K3/00 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE: To obtain a polyester film excellent in flatness, slipperiness, wear resistance and winding characteristics, thus suitable for magnetic recording media, containing a combination of organic polymer particles and inorganic particles having specific shapes and specific diameter ranges, respectively. CONSTITUTION: This film contains (A) 0.005-20wt.% of organic polymer particles 0.4-2.0μm in average diameter, 1.0-1.2 in particle diameter ratio (major axis/ minor axis), and =0.5μm, the thermal decomposition temperature of the component A >=350 deg.C, and the polyester be polyethylene 2,6-naphthalate.

公开(公告)号：JPH0834905A

公开(公告)日：1996-02-06

申请号：JP17127094

申请日：1994-07-22

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  KAGAMI NOBUYUKI ,  SUZUKI MASARU

IPC: C08J5/18 ,  B32B27/36 ,  C08K3/00 ,  C08L67/00 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733 ,  G11B5/704

Abstract: PURPOSE:To obtain the polyester film containing specific organic polymer particles and specific inorganic particles in a specified ratio, excellent in flatness, slipperiness and abrasion resistance, and useful for magnetic tapes, etc. CONSTITUTION:This polyester film comprises the film of a polyester, such as polyethylene 2,6-naphthalate, containing at least two kinds of particles. Therein, organic polymer particles, such as vinyl benzene polymer particles, having an average particle diameter of 0.05-0.4mum, a particle diameter ratio (long diameter/short diameter) of 1.0-1.2, and a particle distribution relative standard deviation of

公开(公告)号：JPH07331041A

公开(公告)日：1995-12-19

申请号：JP12040194

申请日：1994-06-01

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  KAGAMI NOBUYUKI ,  SUZUKI MASARU

IPC: C08J5/18 ,  B29C55/12 ,  B29K67/00 ,  B29L9/00 ,  B32B27/36 ,  C08K7/16 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain a polyester film excellent in surface evenness, sliding property, abrasion resistance and rolling characteristic and suitably usable for magnetic recording mediums. CONSTITUTION:This polyester film contains 0.01-2.0wt.% of organic polymer particles A having >=0.01mum, =0.05mum larger than that of the organic polymer particle A, >=0.1mum and having

公开(公告)号：JPH07331037A

公开(公告)日：1995-12-19

申请号：JP12040294

申请日：1994-06-01

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  KAGAMI NOBUYUKI ,  SUZUKI MASARU

IPC: C08J5/18 ,  B32B27/36 ,  C08G63/181 ,  C08G63/189 ,  C08K3/38 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain a polyester composition comprising a bifunctional acid component composed mainly of an aromatic dicarboxylic acid and a glycol component, containing aluminum borate particles, excellent in evenness, sliding property, chipping resistance and abrasion resistance and suitable for films, etc. CONSTITUTION:This polyester composition contains a polyester comprising (A) a bifunctional acid component composed mainly of an aromatic dicarboxylic acid such as 2,6-naphthalenedicarboxylic acid and (B) a glycol component such as ethylene glycol and (C) preferably 0.01-5.0wt.% of aluminum borate particles of 9Al2O3.2B2O3, etc., having 0.1-50mum long diameter and 0.01-5mum short diameter and 1.5-100 ratio of long diameter/short diameter.

公开(公告)号：JPH07258523A

公开(公告)日：1995-10-09

申请号：JP5077194

申请日：1994-03-22

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  KAGAMI NOBUYUKI ,  SUZUKI MASARU

IPC: C08J5/18 ,  B32B27/36 ,  C08G63/78 ,  C08K3/20 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain a polyester compsn. improved in respect of dispersibility therein of particles and abrasion resistance of a molded product thereof by adding a slurry contg. sodium atoms and having a given pH to cross-linked polymer particles. CONSTITUTION:A slurry contg. sodium atoms in an amt. of 500ppm to 10,000ppm by wt. in terms of NaOH and having a pH of 6 to 9 is added to cross-linked polymer particles in an arbitrary step during preparation of a polyester compsn. or after preparation thereof to obtain a polyester compsn. The cross-linked polymer particles are not particularly limited in respect of compsn., and may be any such particles in so far as at least part of them is made up of a cross- linked polymer insoluble in a polyester. In general, specific examples of the cross-linked polymer particles include particles of copolymers of a monovinyl compd. (A) having only 1 aliph. unsatd. bond per molecule (e.g. styrene) with a compd. (B) having at least 2 aliph. unsatd. bonds per molecule (e.g. divinylbenzene) as the cross-linking component. The method of adding sodium atoms to the slurry is not particularly limited.

公开(公告)号：JPH07247412A

公开(公告)日：1995-09-26

申请号：JP4147594

申请日：1994-03-11

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  KAGAMI NOBUYUKI ,  SUZUKI MASARU

IPC: C08J5/18 ,  B32B27/36 ,  C08K3/26 ,  C08K3/36 ,  C08K7/16 ,  C08K13/04 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain the subject composition, excellent in resistance to falling off of particles in a production process when converted into a molding such as a film, especially a calendering treatment step by using two kinds of cross- linked polymeric particles having different characters. CONSTITUTION:This polyester composition contains cross-linked polymeric particles (X) having a strength (Sag), obtained in deforming the particles by 10% and capable of satisfying the formula 0 ) and particles (Y) having the S10 satisfying formula 3 ) and higher than that of the cross-linked polymeric particles (X) by >=1kgf/mm . The particles (Y) are preferably calcium carbonate or silica particles.

公开(公告)号：JPH07242800A

公开(公告)日：1995-09-19

申请号：JP3725094

申请日：1994-03-08

Applicant: TORAY INDUSTRIES

Inventor： KOJIMA HIROJI ,  AOYAMA MASATOSHI ,  SUZUKI MASARU

IPC: C08J5/18 ,  C08G63/82 ,  C08K3/10 ,  C08K3/32 ,  C08K5/09 ,  C08K5/49 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain a polyester compsn. which gives a film excellent in resistances to abrasion and scratch and suitable for a magnetic recording medi um. CONSTITUTION:This polyester compsn. contains at least either an alkali metal compd. or an alkaline earth metal compd. and a phosphorus compd. in such amts. as to satisfy the relation: 5 g of a polyester resin; and P is the total number of moles of the phosphorus compd. contained in 10 g of the resin).

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.

公开(公告)号：JPH073129A

公开(公告)日：1995-01-06

申请号：JP14653893

申请日：1993-06-17

Applicant: TORAY INDUSTRIES

Inventor： KOJIMA HIROJI ,  AOYAMA MASATOSHI ,  SUZUKI MASARU

IPC: C08K9/04 ,  C08J5/18 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To obtain the composition which can provide a film excellent in wear an scratch resistances and desirable for magnetic recording media. CONSTITUTION:A polyester composition containing 0.01-10wt.% inert particles having a mean particle diameter of 0.005-2.0mum and surface-treated with a sulfonic acid polymer compound is provided.

公开(公告)号：JPH06145487A

公开(公告)日：1994-05-24

申请号：JP30135592

申请日：1992-11-11

Applicant: TORAY INDUSTRIES

Inventor： AOYAMA MASATOSHI ,  SUZUKI MASARU ,  OSHIMA KATSUNORI

IPC: B32B27/36 ,  C08J5/18 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To provide a polyester composition giving a film having remarkably improved abrasion resistance and causing little damage to magnetic surface in high-speed transportation of the film. CONSTITUTION:A polyester produced by using an aromatic dicarboxylic acid and a glycol as main constituent components, preferably an alkylene terephthalate or alkylene naphthalate as main constituent components is incorporated with 0.005-10wt.% (preferably 0.01-5wt.%) of polymer particles composed of an unsaturated polyester resin and having an average particle diameter of 0.01-5mum (preferably 0.03-1mum). The unsaturated polyester resin is crosslinked with a vinyl monomer and has a heat-resistance of preferably >=350 deg.C measured as the thermal decomposition temperature (10% weight-reduction temperature) by a thermobalance. The addition of the polymer particles is carried out e.g. by adding the polymer to the reaction system of the polyester in the form of powder or glycol slurry or kneading into the polyester in powdery form or in the form of slurry prepared by using a low-boiling solvent.