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公开(公告)号：JP2000198140A
公开(公告)日：2000-07-18
申请号：JP28548099
申请日：1999-10-06
Applicant: TORAY INDUSTRIES
Inventor： AEBA MIKA , MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To provide a tenter clip capable of obtaining a thermoplastic resin film uniform in physical properties along its lateral direction, excellent in thermal dimensional stability and mechanical characteristics and good in flatness with good productivity and a method for producing the thermoplastic resin film. SOLUTION: In a tenter clip, a film 2 is made movable in its longitudinal direction at the gripping parts of the clip and both end parts of the film in the film lateral direction are gripped and a ratio x/L1 (N/mm) of the film restricting force x(N) in the film longitudinal direction to clip gripping width L1 (mm) is 0.5 (N/mm) or less. A thermoplastic resin film is produced by using the tenter clip.
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公开(公告)号：JP2000143830A
公开(公告)日：2000-05-26
申请号：JP32641698
申请日：1998-11-17
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , SAKAMOTO JUN , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a thermoplastic resin sheet having improved Young's modulus of elasticity and hot dimensional stability in improved productivity by cooling a molten thermoplastic resin sheet by close adhesion to a cooling drum carrying liquid drops or a liquid film and exerting on the film an action which adds thereto an adhesive force in the direction of the normal of the drum when the film is cooled to a temperature near the melt crystallization initiation temperature of the resin. SOLUTION: A thermoplastic resin such as a polyamide resin having a relative viscosity of 30 meq/kg or above is melt-extruded at a draft ratio of 1 or above in a stream of nitrogen or in a vacuum to obtain a molten thermoplastic resin sheet. This sheet is closely adhered to a cooling drum carrying liquid drops or a liquid film and having a surface temperature of 10-95 deg.C, desirably, 20-80 deg.C and then subjected to a means for exerting an adhesive force in the direction of the normal of the drum when the film is cooled to a temperature near the melt crystallization initiation temperature of the resin to obtain a cast sheet having a thickness of 5 μm to 1 mm. This sheet is heated to 50-210 deg.C, unidirectionally oriented at a draft ratio of 1.1-1.7, and heat-treated.
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公开(公告)号：JP2000141471A
公开(公告)日：2000-05-23
申请号：JP31311998
申请日：1998-11-04
Applicant: TORAY INDUSTRIES
Inventor： AEBA MIKA , TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
IPC: B29C55/12 , B29K101/12 , B29L7/00
Abstract: PROBLEM TO BE SOLVED: To obtain a biaxially oriented thermoplastic resin film having uniform physical properties in its lateral direction, excellent in heat dimensional stability and also good in flatness with good productivity. SOLUTION: In a method for producing a biaxially oriented thermoplastic resin film, a film is biaxially stretched to be heat-treated and, thereafter, the heat-treated stretched film is cooled in a cooling process comprising at least two or more stages so that the temp. difference between adjacent cooling processes is 5-30 deg.C, the cooling temp. of the first cooling process is (Tg+60) deg.C and a cooling time is 0.5-20 sec and, succeedingly, the cooled film is cooled so that the cooling time from the second cooling process to the final cooling process is 3-80 sec and the temp. of the final cooling process becomes (Tg+10) deg.C or lower.
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公开(公告)号：JP2000127221A
公开(公告)日：2000-05-09
申请号：JP30206298
申请日：1998-10-23
Applicant: TORAY INDUSTRIES
Inventor： KUMAGAI TAKUYA , TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
IPC: B29C47/86 , B29C48/305 , B29C48/92 , B29K101/12 , B29L7/00 , B29C47/14 , B29C47/92
Abstract: PROBLEM TO BE SOLVED: To enhance quality by reducing temp. irregularity in a lateral direction and improving thickness accuracy while rapidly corresponding to various production conditions when a molten thermoplastic resin is to be cooled in the land part of a mouthpiece. SOLUTION: A molding cap 1 cools a thermoplastic resin of which the temp. is higher than melting completion temp. Tme to temp. below Tme and higher than temp. drop crystallizing start temp. Tcb in a land part 4 to mold the same. In this case, the thermoplastic resin is cooled by circulating a heating medium having temp. equal to or lower than the cooling temp. of the thermoplastic resin into the mouthpiece 1.
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公开(公告)号：JPH11268100A
公开(公告)日：1999-10-05
申请号：JP7952198
申请日：1998-03-26
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
IPC: B29C47/88
Abstract: PROBLEM TO BE SOLVED: To stably and rapidly form a thermoplastic resin sheet with small thickness unevenness of a film by constituting of landing a central part and an end part of the sheet substantially simultaneously on a moving cooling medium. SOLUTION: The thermoplastic resin sheet is substantially simultaneously landed at its central part and an end part on a moving cooling medium. Thus, times of landing a central part and an end part of the molten sheet from a base lip on a cooling drum are substantially simultaneously, and locuses of the sheet are superposed even at the central part and the end part of a film to be seen as one locus. Then, an angle between a tangential line drawn on the medium of a moving direction of the sheet from a lip of the base end for extruding the sheet and a vertical line drawn vertically from the lip to a ground is set to about 75 degrees or less. Thus, the film having good thickness homogeneity can be molded, and stretchability and moldability can be remarkably improved.
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Patent Agency Ranking
公开(公告)号：JPH11207816A
公开(公告)日：1999-08-03
申请号：JP965298
申请日：1998-01-21
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI , OSADA SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To enhance the productivity of a biaxially oriented thermoplastic resin film by simultaneously stretching a plurality of films by one stretching machine. SOLUTION: Two or more thermoplastic resin unstretched films are superposed one upon another to be simultaneously guided to a biaxially stretching tenter to be biaxially stretched at the same time and the start stretching speeds of the films are set to 10,000%/min or more in respective directions. By this constitution, even if a plurality of the films are stretched at the same time by one stretching machine, the films can be peeled without being sticked mutually and productivity can be largely enhanced.
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公开(公告)号：JPH11170359A
公开(公告)日：1999-06-29
申请号：JP33973097
申请日：1997-12-10
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , OSADA SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To make the compressive modulus to the direction of the thickness of a biaxially oriented polyester film smaller than that of the conventional film and improve the cushioning properties of the film by a method wherein the compressive modulus of the biaxially oriented polyester film is set below the specified value. SOLUTION: A biaxially oriented film is one, to which at least biaxial molecular orientation is given through its lengthwise and widthwise stretching. As the biaxial stretching system, a simultaneous biaxial stretching system, in which a lengthwise and a widthwise stretchings are carried out simultaneously, is especially favorable. When a linear driving tenter, in which the intervals between clips are adjusted, is employed, after the biaxial stretching, a lengthwise or a widthwise stretching can be carried out and further a relaxing treatment can be performed in a heat treatment process after the biaxial stretching. By setting the compressive modulus of the biaxially stretched polyester film to be 300 mg/μm or less, a more flexible film having the cushioning properties in the direction of the thickness than the normal biaxially stretched film can be obtained.
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公开(公告)号：JPH11129327A
公开(公告)日：1999-05-18
申请号：JP30042397
申请日：1997-10-31
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , OSADA SHUNICHI
IPC: C08J5/18 , B29C55/16 , B29K101/12 , B29K105/16 , B29L7/00
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially drawn film with surface which is ultra-smooth, and has no agglomerate, at a favorable productivity. SOLUTION: For this biaxially drawn film wherein a surface roughening material is added to a thermoplastic resin, a central line average surface roughness Ra (mμm) of the film, and the added average particle diameter d (mμm) satisfy a relationship of Ra
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公开(公告)号：JPH11105131A
公开(公告)日：1999-04-20
申请号：JP27424697
申请日：1997-10-07
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , OSADA SHUNICHI
Abstract: PROBLEM TO BE SOLVED: To obtain a film having excellent productivity and uniform quality by serving a thermoplastic resin film having specified shape factor for simultaneously biaxially orienting step. SOLUTION: A thermoplastic resin film having 3 to 1 shape factors D is served for a simultaneously biaxially orienting step. Further, the film is satisfactory by enhancing intrinsic viscosity [ηe] of an end of the film before the simultaneously biaxially orienting to 0.03 or more or preferably 0.05 or more higher than an intrinsic viscosity [ηc] of a center of the film and then simultaneously biaxially orienting the film. As the used thermoplastic resin, various types of polyolefin resin such as polyethylene, polypropylene, polymethylpentene or the like, known polyamide resin such as nylon 6, nylon 66 or the like, polyethylene terephthalate, polybutylene terephthalate or the like is preferable.
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公开(公告)号：JPH1176716A
公开(公告)日：1999-03-23
申请号：JP23817797
申请日：1997-09-03
Applicant: TORAY INDUSTRIES
Inventor： OSADA SHUNICHI , TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a method of filtering polyester for effectively obtaining a film of few faults and of high quality, a method of producing polyester, and a polyester film. SOLUTION: In this method of filtering polyester, soluble gas is infected into molten polyester between an extruder and a filtering process and this molten polyester in which the gas is dissolved is filtered. Resin pressure P1 (MPa) immediately before a filtering process when soluble gas is injected between the extruder and the filtering process and resin pressure P0 (MPa) immediately before when soluble gas is not injected preferably satisfies a formula, P1
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