摘要:
Disclosed herein are light diffusing films, methods of making the same and articles using the same. In one embodiment, a light diffusing film comprises: a polycarbonate and light diffusing particles. The light diffusing particles have a refractive index of about 1.49 to about 1.59. The light diffusing film comprises a hiding power of 0 to about 0.5.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A significant disadvantage of the use of polylactic acid (PLA), lack of flame retardance, has been overcome by the use of polyphosphonate-co-carbonate in combination with an impact modifier, a drip suppressant, and optionally, an epoxy functional styrene-acrylate oligomeric chain extender. The compound achieves a UL 94 rating of V-0 or V-1 and a Notched Izod value of more than about 5 ft-lbs/in. The compound also exceeds a threshold of 100° C. in heat deflection temperature.
摘要:
A significant disadvantage of the use of polylactic acid (PLA) has been overcome by the use of styrene maleic anhydride copolymer (SMAC) to cause an unexpected increase in the heat deflection temperature of the PLA compound, surpassing a delta improvement of 5° C. over the heat deflection temperature of the PLA alone, at 66 psi as measured using ASTM D648 when the blended compound is essentially dried prior to use. The compound also often exceeds a threshold of 65° C. in heat deflection temperature. Use of a compatibilizer and impact modifier further improves the industrial versatility of the heat resistant PLA compound. Alternatively, use of calcium carbonate in the heat resistant PLA compound also is industrially valuable.
摘要:
A significant disadvantage of the use of polylactic acid (PLA) has been overcome by the use of acrylonitrile-butadiene-styrene (ABS) in combination with an epoxy functional styrene-acrylate oligomeric chain extender. The composition also often exceeds a threshold of 65° C. in heat deflection temperature. Use of an impact modifier further improves the industrial versatility of the heat resistant PLA composition.