摘要:
The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 μm, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 μm and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.2, where the total concentration of the spherical scattering particles (A) and particles (B) is in the range from 1 to 60% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, and the spherical scattering particles (A) and spherical particles (B) have a different median particle size V50, where the transmittance of the diffuser sheets is in the range from 20 to 70% and their scattering power is greater than 0.3, where the ratio of the square of average surface roughness of the polymethyl methacrylate layer RZ to the third power of the size of the spherical particles (B) RZ2/DPB3 is in the range from 0.0002 to 0.1300 μm−1.
摘要:
A coated sheet-like plastics material comprising a) as base, a thermoplastic substrate; and b) on the base, a photocatalytically active coating comprising a water-spreading layer which involves either a sol-adhesion-promoter layer, layer b1+2), comprising an adhesion promoter and a colloid sol, or a colloid-sol layer b2) arranged on an adhesion-promoter layer b1) applied on the substrate a), and a photocatalytically active layer b3) arranged on the water-spreading layer b1+2) or b2), where b3) is obtainable through application and drying of a mixture comprising, based on the solids content of the mixture in percent by weight b31) from 1 to 25% of titanium dioxide and b32) from 75 to 99% of silicon dioxide and/or of a metal oxide which is not soluble in water or of an anionically modified silicon dioxide or metal oxide; where the titanium dioxide is particulate with an average primary-particle size smaller than 10 nm. In-line process for producing said material, and also use as roofing material or as glazing material, preferably in areas with moist conditions. The coated sheet-like plastics material of the invention combines water-spreading properties with photocatalytic activity, without any damage to the thermoplastic substrates. The coated sheet-like plastics substrate of the invention is produced in a relatively uncomplicated, inexpensive and fast in-line process and, in use, provides impressive substrate stability and impressive effectiveness of the coating in resisting initial algal growth.
摘要:
The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.
摘要:
The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 μm, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 μm, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.2, and where the total concentration of the spherical scattering particles (A) and particles (B) is in the range from 1 to 60% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, where the concentration of the spherical scattering particles (A) cPA, the thickness of the light-scattering polymethyl methacrylate layer dS and the size of the spherical scattering particles (A) DPA is selected in such a way that the ratio cPA*dS/DPA3 is in the range from 0.001 to 0.015% by weight*mm/μm3, the concentration of the spherical particles (B) cPB, the thickness of the light-scattering polymethyl methacrylate layer dS and the size of the spherical particles (B) DPB is selected in such a way that the ratio cPB*dS/DPB3 is in the range from 0.000005 to 0.002% by weight*mm/μm3 and the ratio of the square of average surface roughness of the polymethyl methacrylate layer RZ to the third power of the size of the spherical particles (B) RZ2/DPB3 is in the range from 0.0002 to 0.1300 μm−1.
摘要:
The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 μm, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 μm, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.2, and where the total concentration of the spherical scattering particles (A) and particles (B) is in the range from 1 to 60% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, where the concentration of the spherical scattering particles (A) cPA, the thickness of the light-scattering polymethyl methacrylate layer dS and the size of the spherical scattering particles (A) DPA is selected in such a way that the ratio cPA*dS/DPA3 is in the range from 0.001 to 0.015% by weight*mm/μm3, the concentration of the spherical particles (B) cPB, the thickness of the light-scattering polymethyl methacrylate layer dS and the size of the spherical particles (B) DPB is selected in such a way that the ratio cPB*dS/DPB3 is in the range from 0.000005 to 0.002% by weight*mm/μm3 and the ratio of the square of average surface roughness of the polymethyl methacrylate layer RZ to the third power of the size of the spherical particles (B) RZ2/DPB3 is in the range from 0.0002 to 0.1300 μm−1.
摘要:
A rear-projection screen that has at least one light-scattering polymethyl methacrylate layer in which is embedded spherical plastic particles; the previously described rear-project screen that has an additional plastic sheet that does not have embedded scattering beads; and a method of making a rear-projection screen.
摘要:
The present invention relates to a [lacuna] having at least one light-entry surface and at least one light-exit surface, the ratio of the light-exit surface area to the light-entry surface area being at least 4, comprising at least one light-guiding layer, characterized in that the light-guiding layer comprises at least 60% by weight, expressed in terms of the weight of the light-guiding layer, of polymethyl methacrylate and from 0.0001 to 0.2% by weight, expressed in terms of the weight of the light-guiding layer, of spherical particles with an average diameter in the range of from 0.3 to 40 μm, and the light-exit surface of the light-guiding layer is provided with structurings.
摘要:
The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.
摘要:
The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 μm, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 μm and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.2, where the total concentration of the spherical scattering particles (A) and particles (B) is in the range from 1 to 60% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, and the spherical scattering particles (A) and spherical particles (B) have a different median particle size V50, where the transmittance of the diffuser sheets is in the range from 20 to 70% and their scattering power is greater than 0.3, where the ratio of the square of average surface roughness of the polymethyl methacrylate layer RZ to the third power of the size of the spherical particles (B) RZ2/DPB3 is in the range from 0.0002 to 0.1300 μm−1.
摘要翻译:本发明涉及用于LCD应用的漫射片,其包括至少一种光散射聚甲基丙烯酸甲酯层,其包含聚甲基丙烯酸甲酯基质,并且还基于光散射聚甲基丙烯酸甲酯层的重量计为0.5-59.5重量% 中值大小V <50%的球形散射粒子(A)在0.1〜40μm的范围内,其折射率与聚甲基丙烯酸甲酯基质的折射率不同,为0.02〜0.2 ,和基于光散射聚甲基丙烯酸甲酯层的重量的0.5至59.5重量%的球形颗粒(B),其中位尺寸V <50>在10至150μm的范围内 并且其折射率与聚甲基丙烯酸甲基丙烯酸酯基体的折射率不同在0至0.2的范围内,其中球形散射颗粒(A)和颗粒(B)的总浓度在1至60%的范围内,通过 重量,基础o n光散射聚甲基丙烯酸甲酯层的重量,球状散射粒子(A)和球形粒子(B)的平均粒径V <50,其中扩散片的透射率为 在20至70%的范围内,并且它们的散射功率大于0.3,其中聚甲基丙烯酸甲酯层R SUB平均表面粗糙度的平方与第三功率的比值 球形颗粒(B)R Z 2 / D 3 PB 3 O 3的范围在0.0002至0.1300μm的范围内, SUP> -1 SUP>。