Optically diffusive plastic having high stiffness
First Claim
1. An optically diffusive plastic comprising:
- 40 to 94.9 mass % of a polymer resin matrix;
5 to 50 mass % of a glass filler; and
0.1 to 10 mass % of a light diffusing component;
wherein the difference between refractive index of the polymer resin matrix and refractive index of the glass filler is less than or equal to 0.02;
wherein a 1 mm thick sample of the optically diffusive plastic comprises DLD value of greater than or equal to 1°
as measured by goniophotometry, and a total transmittance of greater than or equal to 40% for incident light having a wavelength of 360 nm to 750 nm in air as determined by ASTM D1003 Procedure A, using CIE standard illuminant D65; and
at least one ofwherein a 3.2 mm thick sample of the optically diffusive plastic comprises a flexural modulus, measured at 23°
C., of greater than or equal to 2,500 MPa as determined by ASTM D790; and
wherein a test sample of the optically diffusive plastic having a thickness of 1 mm, a width of 13.2 mm, and a length of 121 mm, is extended across a span of 60 mm exhibits a deflection of less than or equal to 10 mm when subjected to a load of 1 kgf applied by a load head having a 5 mm diameter and positioned in the center of the sample and center of the span in accordance to ASTM D5023.
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Accused Products
Abstract
An optically diffusive plastic can comprise 40 to 94.9 mass % of a polymer resin matrix; 5 to 50 mass % of a glass filler; and 0.1 to 10 mass % of a light diffusing component; wherein the difference between refractive index of the polymer resin matrix and refractive index of the glass filler is less than or equal to 0.02; wherein a 1 millimeter (mm) thick sample of the optically diffusive plastic comprises a DLD value of greater than or equal to 1 degree (°) as measured by goniophotometry; wherein the 1 mm thick sample comprises a total transmittance of greater than or equal to 40% for incident light having a wavelength of 360 nanometers (nm) to 750 nm in air; and wherein a 3.2 mm thick sample of the optically diffusive plastic comprises a flexural modulus, measured at 23° C., of greater than or equal to 2,500 Megapascal (MPa).
9 Citations
20 Claims
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1. An optically diffusive plastic comprising:
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40 to 94.9 mass % of a polymer resin matrix; 5 to 50 mass % of a glass filler; and 0.1 to 10 mass % of a light diffusing component; wherein the difference between refractive index of the polymer resin matrix and refractive index of the glass filler is less than or equal to 0.02; wherein a 1 mm thick sample of the optically diffusive plastic comprises DLD value of greater than or equal to 1°
as measured by goniophotometry, and a total transmittance of greater than or equal to 40% for incident light having a wavelength of 360 nm to 750 nm in air as determined by ASTM D1003 Procedure A, using CIE standard illuminant D65; andat least one of wherein a 3.2 mm thick sample of the optically diffusive plastic comprises a flexural modulus, measured at 23°
C., of greater than or equal to 2,500 MPa as determined by ASTM D790; andwherein a test sample of the optically diffusive plastic having a thickness of 1 mm, a width of 13.2 mm, and a length of 121 mm, is extended across a span of 60 mm exhibits a deflection of less than or equal to 10 mm when subjected to a load of 1 kgf applied by a load head having a 5 mm diameter and positioned in the center of the sample and center of the span in accordance to ASTM D5023. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An illuminating device comprising:
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a light source; and an optical element comprising an optically diffusive plastic, wherein the optically diffusive plastic comprises 40 to 94.9 mass % of a polymer resin matrix; 5 to 50 mass % of a glass filler; and 0.1 to 10 mass % of a light diffusing component; wherein the difference between refractive index of the polymer resin matrix and refractive index of the glass filler is less than or equal to 0.02; wherein a 1 mm thick sample of the optically diffusive plastic comprises DLD value of greater than or equal to 1°
as measured by goniophotometry, and a total transmittance of greater than or equal to 40% for incident light having a wavelength of 360 nm to 750 nm in air as determined by ASTM D1003 Procedure A, using CIE standard illuminant D65; andat least one of wherein a 3.2 mm thick sample of the optically diffusive plastic comprises a flexural modulus, measured at 23°
C., of greater than or equal to 2,500 MPa as determined by ASTM D790; andwherein a test sample of the optically diffusive plastic having a thickness of 1 mm, a width of 13.2 mm, and a length of 121 mm, is extended across a span of 60 mm exhibits a deflection of less than or equal to 10 mm when subjected to a load of 1 kgf applied by a load head having a 5 mm diameter and positioned in the center of the sample and center of the span in accordance to ASTM D5023; and wherein the optical lens or the optical diffuser is disposed between the light source and an object to be illuminated.
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20. A method of forming an optical element comprising:
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heating a optically diffusive, wherein the optically diffusive plastic comprises 40 to 94.9 mass % of a polymer resin matrix; 5 to 50 mass % of a glass filler; and 0.1 to 10 mass % of a light diffusing component; wherein the difference between refractive index of the polymer resin matrix and refractive index of the glass filler is less than or equal to 0.02; wherein a 1 mm thick sample of the optically diffusive plastic comprises DLD value of greater than or equal to 1°
as measured by goniophotometry, and a total transmittance of greater than or equal to 40% for incident light having a wavelength of 360 nm to 750 nm in air as determined by ASTM D1003 Procedure A, using CIE standard illuminant D65; andat least one of wherein a 3.2 mm thick sample of the optically diffusive plastic comprises a flexural modulus, measured at 23°
C., of greater than or equal to 2,500 MPa as determined by ASTM D790; andwherein a test sample of the optically diffusive plastic having a thickness of 1 mm, a width of 13.2 mm, and a length of 121 mm, is extended across a span of 60 mm exhibits a deflection of less than or equal to 10 mm when subjected to a load of 1 kgf applied by a load head having a 5 mm diameter and positioned in the center of the sample and center of the span in accordance to ASTM D5023; introducing the optically diffusive plastic into a cavity of a molding device, wherein the cavity is defined by a die having opposing surfaces, and wherein the cavity has a shape of the optical element; pressing the opposing surfaces of the die together; and cooling the cavity to form the optical element.
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Specification