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公开(公告)号：JP2000301587A
公开(公告)日：2000-10-31
申请号：JP32906299
申请日：1999-11-19
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , SAKAMOTO JUN , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a high speed casting method for a polyamide resin. SOLUTION: At a point where a molten polyamide resin sheet comes into contact with two moving cooling media, this polyamide resin sheet is held between two cooling media to be mechanically brought into close contact with cooling media and a water films or waterdrops are formed on the surfaces of the cooling media to form close contact force on both surfaces of the molten polyamide resin sheets by the surface tension due to the meniscuses between both surfaces of the sheets and the cooling media to cool the polyamide resin sheet in close contact state by surface tension and mechanical nip pressure.
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公开(公告)号：JP2000218679A
公开(公告)日：2000-08-08
申请号：JP2501699
申请日：1999-02-02
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , SAKAMOTO JUN , MACHIDA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To realize excellent productivity and quality at a high speed by manufacturing in a shafts intersecting state at a specific angle formed between a rotary shaft of a charging roll and a rotary shaft of a cooling medium. SOLUTION: A molten thermoplastic resin is extruded from a mouth, and then a thermoplastic resin sheet is brought into contact with charging roll and cooling medium, cooled and solidified while simultaneously holding the sheet between shafts intersecting state of the roll and the medium. Then, an angle θ formed between the shaft of the roll and the shaft of the medium is set to 0
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公开(公告)号：JP2000062000A
公开(公告)日：2000-02-29
申请号：JP23826398
申请日：1998-08-25
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI , KUMAGAI TAKUYA
IPC: B29C47/86 , B29C48/305 , B29K101/12 , B29L7/00 , B29C47/14
Abstract: PROBLEM TO BE SOLVED: To make the temperature of a mouthpiece in its width direction uniform by inserting at least one heat pipe in the width direction of a mouthpiece in which a thermoplastic resin is molded in a sheet or film shape. SOLUTION: At least one heat pipe is inserted in the width direction of a mouthpiece at a land part molded to be a sheet shape after a resin is expanded in the width direction. The insertion of the heat pipe into the mouthpiece makes the temperature of the mouthpiece uniform. The insertion direction is fitted with the width direction of the mouthpiece, thereby reducing the temperature difference between the central portion and the edge portion of the mouthpiece. It is desired the number of the inserted pipe be generally about 2-20, since more pipes increase the effect of uniform temperature. The resin transferred to the mouthpiece is molded to be a sheet shape through the mouthpiece in which the heat pipe is inserted, and discharged. Use of the mouthpiece achieves the smaller temperature range in the width direction and the excellent thick controlling property in the width direction, so as to obtain a film with smaller thickness uniformity in the width direction.
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公开(公告)号：JPH11300814A
公开(公告)日：1999-11-02
申请号：JP11040598
申请日：1998-04-21
Applicant: TORAY INDUSTRIES
Inventor： OSADA SHUNICHI , TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a white film which is of a low specific gravity and has a high cushioning performance and further is hardly creased with excellent flexible properties, especially a white film which can be used best suitably as a base material for a print base material, wrapper, card, label, receptive paper for video printer, photographic paper, display board, reflector base material for face light source, film for radiography, model paper for ceramic molding or the like. SOLUTION: This white film is made of 95% or more one kind of thermoplastic resin of the total film constituent ingredients at least uniaxially stretched. In addition, the white film has 0.5 μm or more and 30 μm or less foam dia. (L) in the longitudinal or the width direction of the film and 0.1 μm or more and 10 μm or less foam dia. (Lz) in the thickness direction, the foam meeting the formula: 3
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公开(公告)号：JPH11254578A
公开(公告)日：1999-09-21
申请号：JP6259198
申请日：1998-03-13
Applicant: TORAY INDUSTRIES
Inventor： AEBA MIKA , MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To obtain a film structure having good flatness without strain or twist curl even by laminating films of any slit positions in the case of laminating. SOLUTION: The film structure is obtained by laminating at least two biaxially oriented films so that an angle made by orienting main axes becomes 10 to 180 deg.. Thus, the film having a heat shrinkage factor of the film at 150 deg.C in an arbitrary direction of the film of -0.1 to 1% and a difference of the heat shrinkages at 150 deg.C in two arbitrary directions of the film of a range of 0 to 0.3% is used.
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Patent Agency Ranking
公开(公告)号：JPH11227025A
公开(公告)日：1999-08-24
申请号：JP3306198
申请日：1998-02-16
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , KUMAGAI TAKUYA
IPC: B29C48/305 , B29C48/92 , B29L7/00 , B29C47/14 , B29C47/92
Abstract: PROBLEM TO BE SOLVED: To provide a melt extrusion method capable of producing a sheet, a film, fibers, a molded product of a clean molten thermoplastic resin not containing thermally decomposed matter, gelled matter or foreign matter. SOLUTION: In a melt extrusion method supplying a thermoplastic resin to a melt extruder to melt and filter the same and extruding the filtered molten resin from a molding cap, the thermoplastic resin is molded while vibration is applied to the resin in the process from the melting process to the filtering process. The pressure of the molten resin in a vibration applying process is pref. set to a high pressure of 5 MPa or more. The thermoplastic resin is selected from a polyester, a polyolefin, polyphenylene sulfide and a polyamide.
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公开(公告)号：JPH11157016A
公开(公告)日：1999-06-15
申请号：JP34218397
申请日：1997-11-27
Applicant: TORAY INDUSTRIES
Inventor： SAKAMOTO JUN , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To obtain a good preventive property of forgery and alteration at low cost by taking reticular matter containing a magnetic substance by a specific range of wt.% and laminating a film on at least one surface thereof. SOLUTION: The laminate is formed by making an adhesive layer with reticular matter including at least a magnetic substance of 1-90 wt.%, and laminating a film on at least one surface thereof. From the laminate, a random signal is obtained, which originates from the form of reticular matter. Such a magnetic signal has a diverse pattern output, and so on every part of the laminate, so that it can be regarded as a fingerprint. The existence of the fingerprint can prevent the forgery and alteration of the laminate. Also, the reticular matter has an adhesiveness per se relative to the film to be an adhesive layer in the laminate, thus forming reticular matter on the directly. Therefore, a laminate can be obtained at low cost suitable for preventing forgery and alteration.
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公开(公告)号：JPH11156922A
公开(公告)日：1999-06-15
申请号：JP32754797
申请日：1997-11-28
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , OSADA SHUNICHI
IPC: B29C47/88 , B29K101/12 , B29L7/00
Abstract: PROBLEM TO BE SOLVED: To prevent induction of a sheet surface defect, a thickness irregularity, and a width fluctuation even when a thickness of the sheet is thick by a method wherein when a thermoplastic resin molten sheet is stuck close to a transfer cooling medium by impressing an electrostatic charge thereto, costing is executed by making a water liquid film lie only at both end parts of the thermoplastic resin sheet. SOLUTION: In a cast method wherein a thermoplastic resin molten sheet is cooled by sticking that close to a transfer cooling medium by impressing electrostatic charge thereto, intensive adhesion to the transfer cooling medium is obtained over the whole of a sheet width by improving adhesion at an end part by making a water liquid film lie practically only at both end parts of the thermoplastic resin sheet. A thickness of the water liquid film formed at the sheet end part is further preferably 0.03 to 0.2 μm. Formation of the water liquid film can be executed by applying a water film and a water drop. As a method wherein such the water film and the water drop are applied, a comparatively simple roller coating method is preferable. It is important that a surface roughness of the transfer cooling medium is 0.2 μm or under and smooth.
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公开(公告)号：JPH11115043A
公开(公告)日：1999-04-27
申请号：JP27867897
申请日：1997-10-13
Applicant: TORAY INDUSTRIES
Inventor： AEBA MIKA , MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To improve mechanical properties, heat-dimensional stability, ease of handling and shape in roll by specifying the proportion of thickness irregularities in the longitudinal direction and the width direction and further, perform an aging treatment under specific temperature conditions. SOLUTION: A biaxially stretched film with thickness irregularities of 0.3% or more and 5% or less in the longitudinal direction over a length of 10 m and 0.5% or more and 5% or less in the thickness direction, is subjected to an aging treatment at Tg -30 deg.C or less and Tg or less. In addition, in case the Fourier analysis of the wave-form of the thickness irregularities in the longitudinal direction over the length of 10 m is performed, the ratio Pw/PwT to the spectrum intensity sum PwT in the total wavenumber zone of a spectrum intensity sum Pw when the wavenumber is 1 (1/m) or more and 2 (1/m) or less, is preferably 0.15 or less, and more preferably the ratio Pw/Pwt is 0.1 or less.
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公开(公告)号：JPH1158498A
公开(公告)日：1999-03-02
申请号：JP22811097
申请日：1997-08-25
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , OSADA SHUNICHI
IPC: B29C47/88 , B29K101/12 , B29L7/00
Abstract: PROBLEM TO BE SOLVED: To make it possible to realize adhesive properties across the entire width of a thermoplastic resin sheet and a high-speed casting process and further, stabilize stretching properties and coat formation by applying a static charge across a width which is larger than the entire width of the thermoplastic resin sheet to bring the resin sheet into contact tightly with a mobile cooling medium so that the melt sheet is cooled. SOLUTION: In a casting method by which a static charge is applied to a thermoplastic resin melt sheet to bring the melt sheet into contact tightly with a mobile cooling medium so that the melt sheet is cooled, the static charge is applied across a width which is larger than the entire width of the thermoplastic sheet. For this purpose, an electrode for bringing the center part of the sheet into contact tightly with the mobile cooling medium and an electrode for bringing the end part of the sheet into contact tightly with the medium are used. In addition, the applied voltage which is applied to the end part of the sheet is as low as about 5-15 kV so that discharge to the cooling medium is prevented from occurring, while the voltage to be applied to the center part of the sheet is as high as about 8-35 kV. Besides, the applied voltage which is applied to the end part of the sheet is lower than the voltage to be applied to the center part of the sheet.
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