摘要:
PROBLEM TO BE SOLVED: To provide a mold release film free from uneven thickness due to nonuniform stretching when stretched during molding with a die.SOLUTION: A mold release film is made of a fluorine-containing resin. In the mold release film, a difference between a stress in the longitudinal direction of the film and a stress in the transverse direction is 1.80 MPa or less, and the stress is a value obtained by performing measurement using a method conforming to ASTM D1708-02a under the conditions of a 120°C atmospheric temperature and a 100 mm/min pulling rate.
摘要:
PROBLEM TO BE SOLVED: To provide a laminate containing a biodegradable resin, which has also a superior workability while keeping a biodegradability. SOLUTION: The biodegradable resin laminate has a resin layer containing the biodegradable resin, and has a heat-sealing strength of the laminate of 10 N/15 mm or more. COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To automate the changing of a sheet thickness in sheet forming using a touch roll or the like. SOLUTION: The take-up speed of the sheet under forming the sheet and the thickness of the formed sheet are each measured, the thickness of the sheet input by an operation board 55 is taken into the control device 50 when changing the thickness of the sheet. The take-up speed of the sheet after changing the thickness of the sheet is calculated by the control device 50 according to the operational expression Va=Vb (Tb/Ta) and the take-up speed of the sheet is controlled by the operational value. Wherein, Va: a take-up speed of the sheet after being changed, Vb: a take-up speed of the sheet before being changed, Ta: a thickness of the sheet after being changed, and Tb: a thickness of the sheet before being changed. COPYRIGHT: (C)2008,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To stably manufacture a sheet of a high product quality under accurate roll clearance settings through minimizing the variation of the roll clearance due to the inevitable fluctuating vibration in a feedback control and making the above measure and a highly precise position control stand together. SOLUTION: At the time of changing the control target values of the roll clearance, the roll position control is conducted from the position information detected by the linear scales 42R and 42L. When the deviation between the control target values after the change of the control target values and the roll position measurement values by the linear scales 42R and 42L falls below predetermined values, the roll position control is performed from the positions of the driving means detected by the piston displacement gages 41R and 41L that have a higher resolution than that of the linear scales 42R and 42L. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide an optical film having uniform retardation and a delay phase axis in a width direction of the film, which is used for various display devices such as a liquid crystal display (LCD), specifically useful for a protective film for a polarizing plate and a retardation film used for the display device, and to provide its manufacturing method and a polarizing plate using the optical film. SOLUTION: The manufacturing method of the optical film by melt-casting comprises at least each one of a process for extruding a cellulose ester resin or cycloolefin resin from a melt-casting die, a process for cooling and solidifying the extruded film (a web), a process for orientating the obtained unoriented film in a width direction, and a process for rolling the obtained film. The cooling and solidifying is performed by a roll-like cooling drum allowing regulation of temperatures separately in a width direction. COPYRIGHT: (C)2007,JPO&INPIT