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101.发明专利
公开(公告)号：JPH10119112A
公开(公告)日：1998-05-12
申请号：JP28063996
申请日：1996-10-23
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI , OKUDA AKIKO
IPC: B29C47/80 , B29C47/88 , B29C48/305 , B29C48/38 , B29C55/12 , B29K67/00 , B29L7/00 , B29C47/14 , B29C47/50
Abstract: PROBLEM TO BE SOLVED: To obtain an effect for improving quality of yield or a film by suppressing generation of foreign substances, modified polymers, etc., caused by thermal deterioration of the resin and decreasing defects caused by foreign substances when a film is formed and to prevent the film from being broken during drawing of a film and to decrease amt. of oligomer in the film by suppressing regeneration of the oligomer in the resin. SOLUTION: A method for extruding a thermoplastic resin wherein after the thermoplastic resin is melted by heating it at least at the melting completing temp, it is cooled under an atmosphere at least at the crystallization starting temp. of the resin in decreasing temp. and then, temp. of the flow path for the resin is set at a higher temp. than the cooling temp. to perform extrusion is provided and a biavisally oriented thermoplastic resin film is obtd, by performing extrusion by using this method for extrusion and molding it into a sheet and performing thereafter biaxial orientation.
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公开(公告)号：JPH09295345A
公开(公告)日：1997-11-18
申请号：JP11260496
申请日：1996-05-07
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To obtain a film which reduces bowing phenomenon and lessen the distribution of an orientation generated when the film is drawn by a tenter and further, has uniform physical properties in the width direction by specifying the distribution in the direction of a main orientation axis across a unit length in the width direction of the film. SOLUTION: The distribution of the direction of a main orientation axis across the length of 1m in the width direction of film needs to be 0-10 deg., preferably 0-5 deg. and more preferably 0-3 deg.. The direction of the main orientation axis is determined by measuring the birefriningence of the film using a polarization microscope with a mounted compensator under crossed nicoles and measuring the angle in the direction of the main orientation axis counter-clockwise, given a direction in which the index of refraction is highest as the direction of the main orientation axis and also the width direction of the film as 0 deg.. When the distribution of the direction on the main orientation axis across the length of 1m in the width direction of the film is 0 deg., the direction of the orientation in the width direction is uniform.
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公开(公告)号：JPH09262894A
公开(公告)日：1997-10-07
申请号：JP9764296
申请日：1996-03-27
Applicant: TORAY INDUSTRIES
Inventor： YAMAMOTO AKIKO , TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To suppress the deterioration of a polymer and the development of an oligomer by a method wherein the temperature of a liquid contact surface is cooled down to a temperature, which is below the fusion end temperature of resin and not less than its falling temperature crystallization start temperature, during one process between a metering part and a mouth piece after the resin is heated up to a temperature, which is not less than the fusion end temperature of the resin and below its heat decomposition start temperature at a fusion part. SOLUTION: The fused resin, which is fused at the fusion parts of extruders 1 and 2 and sent out of the extruders 1 and 2, is guided through heated polymer tubes 3 and 5 to a mouth piece 7. In addition, when necessary, a gear pump 4 may well be provided so as to improve the constant amount feeding properties of the resin. In this time, the resin is once heated at the fusion part of the extruders 1 and 2 up to a temperature, which is not less than the fusion end temperature of the resin and below its heat decomposition start temperature. After that, during one process between the metering part of the extruder and the mouth piece 7, the temperature of a liquid contact surface is cooled down to a temperature, which is below the fusion end temperature of the resin and not less than its falling temperature crystallization start temperature. As a result, the development of foreign matter or oligomer due to the heating of the resin and the surface defects of a film due to them can be reduced.
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公开(公告)号：JPH0952462A
公开(公告)日：1997-02-25
申请号：JP16672696
申请日：1996-06-05
Applicant: TORAY INDUSTRIES
Inventor： NAKAHARA KATSUJI , MIYAGAWA KATSUTOSHI , MIMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a heat transfer image receiving body, which has favorable printing running properties, dot reproducibility and ink transferability and which is excellent in printing quality such as gradation, clearability or the like. SOLUTION: In a heat transfer image receiving body, the base material of which is made of a white polyester film having the thermal conductivity of 0.5×10 -3×10 cal/cm.s. deg.C and the whiteness index of 50-110%, an ink receiving layer, the smoothness of which is 500-20,000sec, is applied on one side of the base material and on the opposite surface side of which an easily sliable layer having the static friction coefficient to the ink receiving layer of 1.5 or less is applied.
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公开(公告)号：JPH08253611A
公开(公告)日：1996-10-01
申请号：JP10001696
申请日：1996-04-22
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI , AOKI SEIZO
Abstract: PURPOSE: To provide the subject film containing a white polyester layer, having respective specific apparent density and cleavage strength, exhibiting excellent heat-resistance, mechanical strength and whiteness, producible at a low cost and, nevertheless, having high cleavage strength and useful as a substitute for paper. CONSTITUTION: This polyester film contains at least a white polyester layer and has an apparent density of 1-1.3g/cm and a cleavage strength of >=500g/15mm. Preferably, the film is a composite film produced by laminating a polyester layer A containing 0.05-25wt.% of inorganic particles on one surface of the white polyester layer, and the white polyester layer is produced by incorporating a polyester with 0.5-30wt.% of a polyolefin resin (especially polymethylpentene) and further with 0.5-50wt.% of at least one kind of polyalkylene glycol or its copolymer and biaxially drawing the laminated film.
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Patent Agency Ranking
公开(公告)号：JPH0780928A
公开(公告)日：1995-03-28
申请号：JP22875093
申请日：1993-09-14
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , YASHIRO TOSHIYA , YAMAKAWA TAKAMICHI
Abstract: PURPOSE:To reduce a bowing phenomenon by a simplified process, to uniformize physical properties in a lateral direction and to reduce a heat shrinkage factor by setting the degree of crystallization of a plastic resin before lateral stretching to a specific value and setting lateral stretching temp. to the range from the temp.- up crystallizing temp. of the plastic resin to the m.p. thereof. CONSTITUTION:The degree of crystallization of a plastic resin before lateral stretching is set to a range of 15-50% and the lateral stretching temp. thereof is set to the range from the temp.- up crystallizing temp. Tcc of the plastic resin to the m.p. thereof. As the plastic resin, a polyester resin is especially pref. from the aspect of excellent mechanical properties and thermal properties but a homopolymer or a copolymer may be used within a range not damaging crystallizability. As a copolymerizing component, polyethylene terephthalate and polyethylene-2,6 naphthalate are especially pref. from the aspect of mechanical strength, heat resistance, chemical resistance and durability. Lateral stretching is performed by a tenter inclusive of simultaneous biaxial stretching. Lateral stretching temp. is pref. set to Tcc+10 deg.C to Tm-20 deg.C.
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公开(公告)号：JPH0516258A
公开(公告)日：1993-01-26
申请号：JP16991391
申请日：1991-07-10
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI , YASHIRO TOSHIYA
Abstract: PURPOSE:To manufacture a polyester film, in which the bleed-out of an oligomer is reduced extremely, even when the film is exposed at a high temperature for a prolonged term by bringing a biaxially oriented polyester film into contact with a roll once, thermally treating the film further thermally treating the film by a tenter for holding both end sections. CONSTITUTION:A polyester film casted is heated by a roll, oriented by approximately 2.5-7 times at one stage or multistages in the longitudinal direction, cooled once, gripped by clips again and heated in a tenter, and oriented by approximately 2.5-6 times in the cross direction. A cross orientation temperature TTD or higher is used as a roll heat treatment temperature, and a temperature range of TTD+80 deg. or lower, preferably TTD+50 deg.C or lower is favorable. Accordingly, a film, which has excellent thermal dimensional stability and quality of which is equalized in the cross direction, is obtained.
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公开(公告)号：JPH03240535A
公开(公告)日：1991-10-25
申请号：JP3799690
申请日：1990-02-19
Applicant: TORAY INDUSTRIES
Inventor： MIMURA TAKASHI , MIYAGAWA KATSUTOSHI , AOKI SEIZO
Abstract: PURPOSE:To enable an excellent ink transfer and vividness to be obtained which has a low specific gravity, thermal stability, and a high whiteness, moreover, surface smoothness by laminating a porous layer on a specific polyester film. CONSTITUTION:Polyester is applied with a low specific gravity agent, and the polyester film is made low in its specific gravity, and incompatible polymer is dispersed and mixed into the polyester film in the shape coefficient in the range of 1 - 4, in order to make the film supporter a polyester film of 2% or below in its thermal contraction at 150 deg.C, 0.95 or above in its specific gravity, and -3 or less in its 6 values of color tone. Of course, the melting point of the incompatible polymer is made 200 deg.C or higher. Subsequently, water dispersing polymer and specific colloidal silica are mixed in a specific range, and the mixed liquids are applied and dried so as to obtain a porous layer. Besides, the peak hole diameter in holes of the porous layer is made 0.06 - 2.0mum in hole diameter distribution curves, or the areal ratio of holes is made 20 - 85%.
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公开(公告)号：JPH03207694A
公开(公告)日：1991-09-10
申请号：JP208390
申请日：1990-01-08
Applicant: TORAY INDUSTRIES
Inventor： MIMURA TAKASHI , MIYAGAWA KATSUTOSHI , AOKI SEIZO
Abstract: PURPOSE:To provide the above sheet having a low density, a high whiteness and excellent in thermal dimensional stability by forming a film support from a polyester film specified in its heat shrinkage factor and specific gravity. CONSTITUTION:A polyester film having low specific gravity and excellent heat stability and whiteness obtained by adding a non-compatible polymer and a specific gravity lowering agent to polyester is used as a base material film and a sublimable dye receiving layer is laminated to the polyester film. This film support has a heat shrinkage factor of below 2% at 150 deg.C and specific gravity of 0.95 or less. When the specific gravity is higher than 0.95, a soft feeling and flexibility are not imparted to the film and, when the heat shrinkage factor becomes 2% or more, the thermal dimensional stability of the film becomes inferior. As the non-compatible polymer, poly-4-methylterpene-1, cellulose triacetate and a modified substance thereof are especially pref. and the m.p. thereof must be 200 deg.C or more. The specific gravity lowering agent is a compound added to polyester to lower the specific gravity thereof and polyethylene glycol is especially pref.
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公开(公告)号：JPH03182349A
公开(公告)日：1991-08-08
申请号：JP32216389
申请日：1989-12-11
Applicant: TORAY INDUSTRIES
Inventor： MIMURA TAKASHI , MIYAGAWA KATSUTOSHI
Abstract: PURPOSE:To obtain a white polyester laminated film excellent in easy adhesiveness, solvent resistance, water resistance and alkali resistance by providing a crosslinked modifying layer to a polyester film to which a non-compatible polymer and a specific gravity reducing agent are added. CONSTITUTION:In a laminated film consisting of a film support and a crosslinked modifying layer, the support is composed of a polyester film having a heat shrinkage factor of below 2% at 150 deg.C and specific gravity of 0.95 or less. As a non-compatible polymer, poly 4-methylpentene-1, cellulose triacetate and modified matter thereof are especially pref. and it is necessary to set the m.p. thereof to 200 deg.C or higher and the content thereof is 3-30wt.%. As a specific gravity reducing agent, polyethylene glycol is pref. and pref. added in an amount of 0.1-5wt.%. It is pref. that the non-compatible polymer is present in the polyester film in a state near to a globular shape and the shape coefficient thereof is 1-4. The crosslinked modifying layer is composed of a composition based on a polymer wherein one or more kind of an acrylic compound is grafted to a polyester resin containing a hydrophilic group and a crosslinking agent.
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