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公开(公告)号：JPH01198350A
公开(公告)日：1989-08-09
申请号：JP2467988
申请日：1988-02-03
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO MINORU , MINAMIZAWA HIDEHITO
Abstract: PURPOSE:To improve surface strength, a cleaning property and end surface strength, by laminating polyester containing colloidal silica and polyester containing no colloidal silica in a specific range of a thickness ratio in such a state that the crystallization characteristic of both of them is specified and respectively setting the projection height on the surface of the silica-containing polyester and the silica wt. ratio in a shaven substance to specific ranges. CONSTITUTION:A layer (B-layer) containing spherical silica caused by colloidal silica is laminated to the single surface of a polyester layer (A-layer) and the thickness ratio (B/A) of both of them is set to 0.04-1.4, a crystallization ratio (B/A) of both of them is set to 0.04-1.4, a crystallization parameter DELTATcg(B-A) is set to 1-45 deg.C, the projection height of the B-layer is set to 20-150nm and the silica ratio in a shaven substance is set to 0.11 or more. By this method, the hardness to generate powder falling from the surface or end surface of a film (surface or end surface strength) and, further, the cleaning property at the time when the powder shaven from the surface of the film is bonded to a roll are improved.
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公开(公告)号：JPH0196225A
公开(公告)日：1989-04-14
申请号：JP25546887
申请日：1987-10-08
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO SATOSHI , MINAMIZAWA HIDEHITO
Abstract: PURPOSE:To obtain the titled film with little damage of the processing rolls to be applied on and also little stained, outstanding in slipperiness, by incorporating a polyester with internally separated particles and/or inert particles so that the average surface roughness and the polyester content in the shared product in the processing fall within specified ranges, respectively. CONSTITUTION:(A) A polyester constituted mainly of ethylene terephthalate unit is incorporated with pref. 1-5wt.% of (B) internally separated particles such as of calcium compound and/or (C) inert particles dispersed in ethylene glycol so that the difference between the cold crystallization temperature and the glass transition point for the resulting master pellets fall in the range, pref. from 65-110 deg.C, followed by forming through a melt extruder into the objective biaxially oriented film with the refractive index ratio falling, pref. between 0.935-0.975 in the direction of thickness. This film has the following additional characteristics: 1, polyester content in the shaved product sticked to the processing rubber roll 0.5-0.95wt.%, 2, average surface roughness 3-30nm.
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公开(公告)号：JPS6397558A
公开(公告)日：1988-04-28
申请号：JP23808286
申请日：1986-10-08
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO SATOSHI , MINAMIZAWA HIDEHITO
Abstract: PURPOSE:To prevent the formation of wrinkles through the lapse of time of a film roll by forming the main constituent of the film from the composition consisting of polyester and at least one kind of inactive inorganic particles. CONSTITUTION:The polyester which constitutes the main constituent of a film consists of ethylene terephthalate, alpha-ethylene, etc., and the inorganic substances which are inactive for polyester such as spherical silica particles are added into said polyester, and the film is prepared. After said film is extended to a thickness of about 5-16mum, a film roll is obtained by winding said film onto a core having an outside diameter of 10-250mm so that the winding diameter is set within a range of 20-300mm. The inactive inorganic particles added into the polyester is formed desirably by the combination of the particle having the average particle size of 0.05-0.5mum in 0.1-1wt% and the particle having the average particle size of 0.6-1.5mum in 0.001-0.05wt%.
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公开(公告)号：JP2000296547A
公开(公告)日：2000-10-24
申请号：JP10795299
申请日：1999-04-15
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , SATO KIMIO
Abstract: PROBLEM TO BE SOLVED: To optimize a time (residence time) required for a resin to pass through a filter in accordance with the particle diameter of particles to be added to the resin so as to reduce the number of coarse protrusions on the surface of a film, in order to inhibit the flocculation of the particles in the filter. SOLUTION: In the method for manufacturing a thermoplastic resin film by which a thermoplastic resin is melted by an extruder and is discharged from a head to be set by cooling on a casting drum into the film after passing through a filter, the average particle diameter x (μm) of an inactive particle contained in a resin and the average residence time y (minute) of the resin in the filter, are set within the range encircled by the formula: y=10x0.3+2, y=2x0.5, y=15, x=0.
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公开(公告)号：JPH11342528A
公开(公告)日：1999-12-14
申请号：JP15290398
申请日：1998-06-02
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , SATO KIMIO , SAKAMOTO JUN
IPC: B29C48/30 , B29K101/12 , B29C47/12
Abstract: PROBLEM TO BE SOLVED: To suppress an adherence or a deposition of a deteriorated polymer or a low molecular weight material to or on a head lip by providing a layer containing a photocatalyst on a lower surface of a lip of at least a head. SOLUTION: A slit 4 to become a resin extrusion passage is formed at a head 1 via lips 2, 3. A slit interval regulating bolt 5 is arranged at the one lip 3. Photocatalyst containing layers 6 are provided on lower surfaces of the lips 2, 3. Thus, the head is formed to provide a layer containing a photocatalyst on a surface layer of the head lip. Accordingly, at the time of extruding a thermoplastic resin, an adherence or a deposition of a deteriorated polymer, a low molecular weight material or the like to or on the head lip can be suppressed. For example, in the case of molding a film, a thickness unevenness of a lateral direction is reduced, and a number of faults is decreased, thereby upgrading a quality of a product.
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Patent Agency Ranking
公开(公告)号：JPH0994903A
公开(公告)日：1997-04-08
申请号：JP25520695
申请日：1995-10-02
Applicant: TORAY INDUSTRIES
Inventor： YOSHIDA MINORU , MINAMIZAWA HIDEHITO , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To make a lubricant coating process unnecessary while handling properties in processing are improved by a method wherein a layer of a non- particle lubricant having a specific solubility parameter is provided on one side. SOLUTION: A layer of a non-particle lubricant X wherein its solubility parameter δSP satisfies the formulas δSP
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公开(公告)号：JPH08197618A
公开(公告)日：1996-08-06
申请号：JP3162395
申请日：1995-01-26
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , TSUNASHIMA KENJI , TOYODA KATSUYA
Abstract: PURPOSE: To stably provide a polyester film whose mechanical strength particularly in the lateral direction is remarkably improved which has not been achieved in a prior art. CONSTITUTION: A polyester film which is substantially in an amorphous state is stretched in the lateral direction in such a manner that a double refraction (Δn) of the film becomes 0.002-0.020 and a crystallizability becomes 10% or lower. It is further stretched in the lateral direction at a temperature lower than the temperature in the precedent lateral stretch.
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公开(公告)号：JP2513826B2
公开(公告)日：1996-07-03
申请号：JP3512289
申请日：1989-02-16
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATOSHI , MINAMIZAWA HIDEHITO , ABE KOICHI
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公开(公告)号：JPH0796544A
公开(公告)日：1995-04-11
申请号：JP24459493
申请日：1993-09-30
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , TOYODA KATSUYA , TSUNASHIMA KENJI
Abstract: PURPOSE:To achieve a good strength in the lateral direction, electromagnetic exchanging properties and slit properties of a film by a method wherein the ratio between the F-5 value in the longitudinal direction and the F-5 value in the lateral direction is specified and the ratio between the refractive index in the longitudinal direction and the refractive index in the lateral direction are also specified. CONSTITUTION:The F-5 value in the lateral direction of a film is more than 14kg/mm , the ratio between the F-5 value in the longitudinal direction and that in the lateral direction is less than 1.1 and the ratio (MD/TD) between the refractive index in the longitudinal direction and that in the lateral direction is more than 0.975. Polyethylene terephthalate is preferable especially as polyester. In a manufacture, the material is melted and extruded in a filmy state by an extruding machine, made into an amorphous state by quenching and solidifying, stretched and oriented in two steps in a longitudinal direction. The stretching temperature is a glass temperature (Tg)-Tg+60 deg.C and the second step stretching is performed at a temperature lower by at least 5 deg.C than the stretching temperature of the first step. Then the two step stretching and orientation is performed in the lateral direction.
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公开(公告)号：JPH06210722A
公开(公告)日：1994-08-02
申请号：JP516493
申请日：1993-01-14
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , ABE KOICHI
IPC: B29C55/12 , B29K7/00 , B29K67/00 , B29L9/00 , B32B27/20 , B32B27/36 , C08L67/03 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PURPOSE:To obtain high electromagnetic conversion characteristics and high burst strength at the time of the formation of a magnetic tape by constituting at least one layer other than the outermost layer based on polyethylene -2,6- naphthalate of polyester of a polyethylene terephthalate component and setting the thickness of this layer to a specific ratio with respect to the whole thickness. CONSTITUTION:A biaxially oriented laminated polyester film is characterized by that at least the outermost layer is composed of polyester based on polyethylene -2,6-naphthalate and at least one layer other than the outermost layer is composed of polyester containing 20wt.% or more of a polyethylene terephthalate component. The thickness of the layer containing 20wt.% or more of the polyethylene terephthalate component is set to 1/50-1/2 the whole thickness of the film. These polyesters are dried to be laminated using two or more extruders, three or more manifolds and a confluent block to form a non- stretched film which is, in turn, biaxially stretched. When a non-sticking roll composed of Teflon or silicone is used, the smoothness of the film is improved.
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