摘要:
According to an aspect of the present invention, since there are a film formation step for forming a film by cooling and solidifying a thermoplastic resin sheet by sandwiching it between a cooling roller and a press roller; and a drawing step for drawing the resultant film uniaxially or biaxially, it is possible to obtain a thermoplastic resin film for optical use having good thickness accuracy and optical characteristics uniform in the width and length directions.
摘要:
A battery charging circuit includes a thermostat sensing the temperature of the battery as it is charged, a silicon controlled rectifier which when conductive enables charging of the battery and when non-conductive prevents charging of the battery, and a transistor which renders the silicon controlled rectifier non-conductive when the temperature of the battery reaches a predetermined level corresponding to complete charging and is adapted to render the silicon controlled rectifier conductive responsive to a temperature of the battery below the predetermined temperature. When the temperature of the battery is lowered below the predetermined level after the battery has been completely charged, the transistor is rendered non-conductive to ensure that the silicon controlled rectifier is not brought again to the conductive state.
摘要:
A method for treating an unstretched thermoplastic resin film. The method includes includes heat treating an unstretched thermoplastic resin film at a glass transition temperature of the thermoplastic resin Tg° C. or higher and Tg+50° C. or lower for 10 seconds or longer and 600 seconds or shorter while conveying the thermoplastic resin film at a tension of 2 N/cm2 or higher and 50 N/cm2 or lower. The method provides a thermoplastic resin film has an in-plane retardation (Re) and a retardation in the thickness direction (Rth) close to 0 nm, and as such the thermoplastic resin film after heat treatment has |Re| of 0 to 10 nm and |Rth| of 0 to 20 nm.
摘要翻译:一种处理未拉伸热塑性树脂膜的方法。 该方法包括:在热塑性树脂Tg℃以上且Tg + 50℃以下的玻璃化转变温度下热处理未拉伸热塑性树脂膜10秒以上600秒以下,同时输送热塑性树脂 膜的张力为2N / cm 2以上且50N / cm 2以下。 该方法提供一种热塑性树脂膜具有面内相位差(Re)和厚度方向(Rth)的接近0nm的延迟,热处理后的热塑性树脂膜具有| Re | 0〜10nm,| Rth | 为0〜20nm。
摘要:
There is provided a method for producing a thermoplastic film, which can suppress the occurrence of residual strain in the film caused by the polishing roller method to prevent the occurrence of stretch non-uniformity in stretching operation and provide a film that has excellent optical characteristics. The molten resin extruded from a die into a sheet is fed between a pair of polishing rollers and cooled while being held and pressed between them so that a cellulose acylate film is formed. The surface of the polishing roller is made up of a fluorine resin.
摘要:
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.
摘要:
Electromagnetic waves radiated when a formed polyester film 18 is longitudinally drawn while one surface of the front and rear surfaces of the polyester film 18 is being heated by a radiant heater 30, are composed of such a wavelength band that a thermal energy of 20% or more and 50% or less of the total thermal energy radiated onto the one surface of the polyester film 18 can transmit from the one surface to the other surface. Thereby, even in the case where the film is longitudinally drawn while one surface of the film is being heated in the longitudinal drawing step, a curl is not easily generated in the film.
摘要:
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: Tc≦(Ts+Te)/2+2.66Xc≦Tc+60 (1) and 2≦Xc≦30 (2), in which Xc (%) indicates a crystallinity of the film after the longitudinal stretching, Tc (° C.) indicates a crystallization temperature of the film after the longitudinal stretching, Ts (° C.) indicates a film surface temperature at an entrance of a stretching zone of the transverse stretching apparatus, and Te (° C.) indicates a film surface temperature at an exit of the stretching zone of the transverse stretching apparatus.
摘要:
There is provided a thermoplastic resin film having a retardation close to 0 nm, in particular, a thermoplastic resin film having a retardation close to 0 nm, thereby showing a small optical anisotropy, and a method for producing the same. The method for producing a thermoplastic resin film includes a step of heat treating a thermoplastic resin film 16 at a glass transition temperature of the thermoplastic resin Tg° C. or higher and Tg+50° C. or lower for 10 seconds or longer and 600 seconds or shorter while conveying the thermoplastic resin film at a tension of 2 N/cm2 or higher and 50 N/cm2 or lower, whereby the thermoplastic resin film 16 has an in-plane retardation (Re) and a retardation in the thickness direction (Rth) close to 0 nm, respectively.
摘要翻译:提供了具有相差接近0nm的热塑性树脂膜,特别是具有接近0nm的延迟的热塑性树脂膜,从而显示出小的光学各向异性及其制造方法。 热塑性树脂薄膜的制造方法具有:热塑性树脂Tg℃以上,Tg + 50℃以下的玻璃化转变温度热处理10秒以上600秒以下的热塑性树脂薄膜16 在2N / cm 2以上且50N / cm 2以下的张力下输送热塑性树脂膜的同时,使热塑性树脂膜16具有面内相位差(Re)和厚度方向的延迟(Re Rth)分别接近0nm。
摘要:
In a stretching area of a tenter, a film is stretched in a Z2 direction. The film has a residual solvent level of not less than 0.03 wt. % and not greater than 10 wt. %. Out of the stretching area, the film enters a relaxing area to relax the film at a predetermined relaxation rate Y (%). Surface temperatures Tp, Ts, Th (° C.) and the relaxation rate Y are controlled to satisfy an expression of 6≦{(− 1/12)×Tp}+{(−⅕)×Ts}+{(⅓)×Th}+Y≦18, where Tp is the temperature of the film five seconds before entering the stretching area, Ts is the temperature of the film at the center in a film transfer direction of the stretching area, and Th is the temperature of the film five seconds after departing the stretching area.
摘要:
A retardation film is manufactured by stretching a thermoplastic resin film while adjusting stretching ratio α [%], temperature β [° C.], and stretching speed γ [%/min] so that the following formulas (1) and (2) are satisfied when the thermoplastic resin film is stretched at the stretching ratio α [%], the temperature β [° C.], and the stretching speed γ [%/min], therefore, stretching unevenness can be prevented: Z>X (1) (X×100/k)×0.2