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Masaaki Otoshi

Masaaki Otoshi, Minami-Ashigara-Shi JP

Patent application numberDescriptionPublished
20100063234METHOD FOR PRODUCTION OF POLYSTER RESIN FILM, AND POLYESTER RESIN FILM, ANTIREFLECTIVE FILM AND DIFFUSION FILM PRODUCED BY THE METHOD - One aspect of the present invention provides a method for production of a polyester resin film comprising melt extruding a polyester resin into a sheet shape, cooling and solidifying the polyester resin sheet on a casting drum, then longitudinally stretching the polyester resin sheet in a longitudinal direction, and then passing the longitudinally stretched polyester resin film through a transverse stretching apparatus to transversely stretch the longitudinally stretched polyester resin film in a transverse direction, wherein Xc, Tc, Ts and Te satisfy the formulas of:03-11-2010
20100112291METHOD FOR PRODUCTION OF POLYESTER RESIN FILM, AND POLYESTER RESIN FILM, ANTIREFLECTIVE FILM AND DIFFUSION FILM PRODUCED BY THE METHOD - A method for producing a polyester resin film includes melt extruding a polyester resin into a sheet shape, cooling and solidifying the polyester resin sheet on a casting drum, then longitudinally stretching the polyester resin sheet in the longitudinal direction, and then transversely stretching the longitudinally stretched polyester resin film in the transverse direction. The glass transition temperature of the polyester resin, Tg (° C.), the crystallinity of the film after the longitudinal stretching, Xc (%), the crystallization temperature of the film after the longitudinal stretching, Tc (° C.), film surface temperature at the entrance of the stretching zone of a transverse stretching apparatus 05-06-2010
20100222567STRETCHED CELLULOSE ACYLATE FILM AND PROCESS FOR PRODUCING THE SAME - One embodiment of the present invention provides a method for producing a stretched cellulose acylate film with an in-plane retardation, Re, of 100 nm or more and a relationship between the thickness direction retardation, Rth, and Re which satisfies Rth<(Re/2), by longitudinally stretching an unstretched cellulose acylate film in a longitudinal direction by pulling by means of a difference in circumferential velocity between a pair of rollers, wherein the method is characterized in that the cellulose acylate film is subjected to free-end uniaxial stretching to a longitudinal stretch ratio of 1 to 2 while the film is being heated in a heating oven installed between the pair of rollers at a stretching temperature in the range of Tc−10° C. to Tc+70° C., Tc being the crystallization temperature of the film, and with the temperature difference in the film width direction maintained within 10° C.09-02-2010

Masaaki Otoshi, Kanagawa JP

Patent application numberDescriptionPublished
20100174043PROCESS FOR PRODUCING ORIENTED THERMOPLASTIC RESIN FILM, APPARATUS THEREFOR AND BASE FILM FOR OPTICAL FILM - Electromagnetic waves radiated when a formed polyester film 07-08-2010
20100184939METHOD FOR PRODUCING BI-AXIALLY ORIENTED THERMOPLASTIC RESIN FILM, AND BASE FILM FOR OPTICAL FILM - In the method for producing a bi-axially oriented thermoplastic resin film, the longitudinal draw ratio X in a longitudinal drawing step is in the range of from 2.8 times to 3.5 times, and the transverse draw ratio Y in a transverse drawing step is in the range of from 3.8 times to 4.8 times. The expression: X≧0.25Y+2.0+(T−(Tg+50))/400, is satisfied where T° C. represents the temperature of the thermoplastic resin film in the transverse drawing step in a tenter 28 and Tg° C. represents the glass transition temperature of the thermoplastic resin film.07-22-2010

Masaaki Otoshi, Fujinomiya-Shi JP

Patent application numberDescriptionPublished
20090042005HEAT TREATMENT OF THERMOPLASTIC FILM, AND THERMOPLASTIC FILM AND METHOD FOR PRODUCING THE SAME - A thermoplastic film is transversely stretched, and then transported in a heat-treating zone (02-12-2009
20090179358METHOD AND APPARATUS FOR PRODUCING SATURATED NORBORNENE RESIN FILM AND METHOD FOR PRODUCING STRETCHED SATURATED NORBORNENE RESIN FILM - An aspect of the present invention provides a method for producing a saturated norbornene resin film by melt film-forming method comprising discharging a molten resin molten in an extruder in a form of a sheet onto a traveling or rotating cooling support from a die so as to be solidified by cooling, wherein the molten resin discharged from the die is subjected to a close contact treatment which allows only the both end parts of the full width of the molten resin to closely contact to the cooling support. According to the aspect, a close contact treatment which allows only the both end parts of the full width of the molten resin discharged from the die to closely contact to the cooling support is conducted in the melt film-forming of a saturated norbornene resin film, a saturated norbornene resin film having an excellent surface quality without the surface quality defects such as step irregularities can be produced.07-16-2009
20090264638METHOD FOR PRODUCING CELLULOSE ACYLATE FILM, CELLULOSE ACYLATE FILM AND OPTICAL FILM - An unstretched cellulose acylate film is stretched in a ratio ranging from 1.05 to 1.6 in the longitudinal direction (MD) in a longitudinal stretching section using at least two rollers having a surface-to-surface separation of 2 to 50 mm therebetween and being different in circumferential velocity, thereafter the cellulose acylate film stretched in the longitudinal direction is heated in the heat treatment section to a temperature ranging from Tc to Tc+80° C. under the conditions that the widthwise ends of the cellulose acylate film are gripped, and thus the cellulose acylate film is contracted in the widthwise direction (TD) to produce the intended cellulose acylate film. This method can provide a cellulose acylate film having properties suitable for an optical film and so on.10-22-2009

Patent applications by Masaaki Otoshi, Fujinomiya-Shi JP