Abstract:
Disclosed herein are light diffusing films, methods of making the same and articles using the same. In one embodiment, a method of making a light-diffusing film comprises: mixing about 90 wt. % to about 99.999 wt. % of a powdered polycarbonate and about 0.001 wt. % to about 3 wt. % light-diffusing particles to form a mixture, wherein weight percents are based on a total weight of the light-diffusing film; melting the mixture to form a melt; and extruding the melt in the form of a sheet to form the light-diffusing film. The light-diffusing film comprises a hiding power of about 0 to 0.5 that is mathematically described by the following equation: Hiding power ( % ) = 1 - ∑ i = 1 n - 1 L i ( on ) ∑ j = 1 n - 1 L j ( off ) × 100 wherein: Li(on) is luminance above ith cold cathode fluorescent lamp, Lj(off) is luminance at a midpoint between cold cathode fluorescent lamp j and cold cathode fluorescent lamp j+1, and n equals number of CCFL lamps.
Abstract:
A film comprising in admixture a thermoplastic resin component comprising a thermoplastic resin component and a glass having a refractive index within 0.04 of the thermoplastic resin component, wherein the film has a haze of less than about 20%, total transmittance of greater than about 70%, and a coefficient of thermal expansion of about 20 to about 80 um/m/° C. measured over a temperature range of 20 to 70° C. The films are of particular utility in optical applications such as light diffuser films.
Abstract translation:一种膜,其包含热塑性树脂成分和热塑性树脂成分的折射率在0.04以内的玻璃的混合物,其中所述膜的雾度小于约20%,总透光率大于约70% ,并且在20至70℃的温度范围内测量约20至约80um / m /℃的热膨胀系数。该膜在诸如光漫射膜的光学应用中特别有用。
Abstract:
Disclosed herein are light diffusing films, methods of making the same and articles using the same. In one embodiment, a method for producing a film, comprising: combining, to form a combination, a polycarbonate having a yellowness index of about 0.8 to about 1.5 as measured in accordance with ASTM E313-73 (D1925), a phosphite stabilizer, an epoxy stabilizer, and light diffusing; forming the combination into the film; wherein the film comprises a hiding power of 0 to about 0.5.
Abstract:
A light collimating and diffusing film and a method for making the film are provided. The film includes a plastic layer having a first side and a second side opposite the first side and at least a first peripheral edge. The first side has a first textured surface, wherein between 7 to 20 percent of slope angles on the first textured surface proximate a first axis has a value between zero and five degrees. The first axis is substantially parallel to the first peripheral edge. The plastic layer collimates light propagating therethrough.
Abstract:
A copolycarbonate is discloses, comprising units of the formula (1) wherein 70 to 99.5 mole percent of the total number of R1 groups are derived from a dihydroxy compound of formula (2) wherein R2 and R3 are each independently a halogen or a C1-6 alkyl group, R4 is a methyl or a phenyl group, and c is independently 0 to 4; and 0.5 to 30 mole percent of the total number of R1 groups are derived from a dihydroxy compound of formula (3) HO—R5—OH (3) wherein at least 60% of the R5 groups are aromatic, and the dihydroxy compound of formula (3) is not the same as the dihydroxy compound of formula (2), and wherein the copolycarbonate has a glass transition temperature of 250° C. or higher.
Abstract:
Disclosed herein are light diffusing films, methods of making the same and articles using the same. In one embodiment, a light diffusing film is formed from a composition comprising: a polycarbonate, phosphite stabilizer, epoxy stabilizer, hindered phenol stabilizer, and light diffusing particles having a refractive index of about 1.3 to about 1.7. The film comprises a hiding power of 0 to about 0.5. In one embodiment, a method for producing a film comprises combining a polycarbonate, a phosphite stabilizer, an epoxy stabilizer, and light diffusing particles to form a combination, and forming the combination into the film.
Abstract:
A thermoplastic composition comprising a polycarbonate, a perfluoroalkyl sulfonate phosphonium salt, and a non-phosphonium perfluoroalkyl sulfonate salt is disclosed, wherein a molded flat disk prepared from the thermoplastic composition has a surface resistivity of 1.0×1010 to 1.0×1014 ohms measured at a temperature of 23±2° C. and at 50±1% relative humidity. A method of making the thermoplastic composition, and articles prepared therefrom, are also disclosed.
Abstract:
A light collimating and diffusing film and a method for making the film are provided. The film includes a plastic layer having a first side and a second side opposite the first side and at least a first peripheral edge. The first side has a first textured surface, wherein between 7 to 20 percent of slope angles on the first textured surface proximate a first axis has a value between zero and five degrees. The first axis is substantially parallel to the first peripheral edge. The plastic layer collimates light propagating therethrough.
Abstract:
A thermoplastic composition comprising a polycarbonate, a perfluoroalkyl sulfonate phosphonium salt, and a non-phosphonium perfluoroalkyl sulfonate salt is disclosed, wherein a molded flat disk prepared from the thermoplastic composition has a surface resistivity of 1.0×1010 to 1.0×1014 ohms measured at a temperature of 23±2° C. and at 50±1% relative humidity. A method of making the thermoplastic composition, and articles prepared therefrom, are also disclosed.
Abstract:
A light-diffusing film comprises about 90 wt. % to about 99.999 wt. % polycarbonate, wherein the polycarbonate comprises a yellowness index of about 0.8 to about 1.5 as measured in accordance with ASTM E313-73 (D1925); about 0.001 wt. % to about 3 wt. % light-diffusing particles; wherein weight percents are based on a total weight of the light-diffusing film; and wherein the light-diffusing film comprises a light transmission of about 45% to about 65% as measured in accordance with ASTM D1003-00, and a hiding power of 0 to about 0.5.