摘要:
According to the present invention, a cellulose acylate film having high thickness precision and no streaks can be formed by producing a film with a cellulose acylate resin by means of the polishing roller method, and a high-performance optical film, which is free from the retardation distribution, can be produced by subsequently stretching the cellulose acylate film thus obtained within a magnification range from 1 or more and 2.5 or less.
摘要:
The present invention provides a method for producing a cellulose acylate film which can prevent the generation of foreign matter problems and can produce a high-quality film. A cellulose acylate resin is molten in a twin-screw extruder and extruded from a die to form a cellulose acylate film. The average residence time of the resin in the extruder is set at 5 minutes or less.
摘要:
The present invention provides a method for producing a thermoplastic film which makes it possible to improve the optical properties of the thermoplastic film obtained by stretching and a thermoplastic film manufactured thereby. The transverse stretching section in which a cellulose acylate film is transversely stretched includes: a preheating zone, a transverse stretching zone, a cooling zone and a thermal relaxation zone, and the cellulose acylate film having been cooled in the cooling zone is immediately subjected to thermal relaxation treatment in the thermal relaxation zone.
摘要:
A circuit for charging a battery having a charge-completion signal generator, e.g., a thermostat, that is turned off when the temperature of a rechargeable battery or cell has reached the level corresponding to charge completion. A constant-current circuit controls the charging current. A light-emitting element is lit by current for controlling the constant-current circuit. A silicon-controlled rectifier operates in conjunction with a switching element upon receiving an external charge-completion signal to cause the constant-current circuit to stop operating and remain off by detecting the cell voltage even after the external charge-completion signal has been cut off.