摘要:
A reflective screen includes a light reflecting layer, and a light diffusing layer provided on the light reflecting layer. The light diffusing layer has the diffusion property that in one (A axis) of two perpendicular axial directions on a light diffusion plane, a luminance distribution curve versus incidence angle is asymmetric with respect to the zero-incidence-angle axis, and the side on which the incidence angle (half-luminance incidence angle) with half of a peak luminance on the A axis in the normal direction to the screen plane is small faces in a direction in which external light has the highest strength.
摘要:
A reflective screen includes a light reflecting layer, and a light diffusing layer provided on the light reflecting layer. The light diffusing layer has the diffusion property that in one (A axis) of two perpendicular axial directions on a light diffusion plane, a luminance distribution curve versus incidence angle is asymmetric with respect to the zero-incidence-angle axis, and the side on which the incidence angle (half-luminance incidence angle) with half of a peak luminance on the A axis in the normal direction to the screen plane is small faces in a direction in which external light has the highest strength.
摘要:
A fly's-eye lens sheet having a light-shielding layer includes a fly's-eye lens sheet body provided with fly's-eye lenses on one principal surface thereof, the light-shielding layer provided on the other principal surface of the fly's-eye lens sheet body, and a photosensitive adhesive layer disposed between the fly's-eye lens sheet body and the light-shielding layer, the photosensitive adhesive layer having adhesive and non-adhesive patterns, wherein the light-shielding layer includes a light-shielding portion disposed on the adhesive pattern and transmitting portions disposed on the non-adhesive pattern for transmitting light transmitted through the fly's-eye lenses, the transmitting portions are located at positions corresponding to light-collecting parts of the fly's-eye lenses, and the light-shielding portion contains carbon particles, the content of the carbon particles being 45% to 65% by weight.
摘要:
A tape cassette storing case for storing a tape cassette comprises a cubic body with lateral walls, a lid body with lateral walls, and a junction member constituting one of the lateral walls of the lid body in linkage with the cubic body and the lid body via hinging means; and a pair of cylindrical members are vertically disposed on a bottom plate of the cubic body by way of being idly inserted in hub holes of a tape supplying and tape take up reel; wherein each of the hub holes comprises a driving pawl hole having an inner peripheral surface formed with a reel-driving pawl, and a reference hole that is formed in concentricity with the driving pawl hole and provided with a diameter smaller than that of the driving pawl hole; and the pair of cylindrical members are respectively formed to be of a height enough to arrive at the reference hole.
摘要:
An optical element with an antireflection function is provided with a substrate having a surface and a plurality of structures formed from convex portions or concave portions and arranged in large numbers on the surface of the substrate with a minute pitch less than or equal to the wavelength of the visible light, wherein the modulus of elasticity of the material forming the structures is 1 MPa or more, and 1,200 MPa or less, and the aspect ratio of the structure is 0.6 or more, and 1.5 or less.
摘要:
A light diffusion sheet, a method of producing a light diffusion sheet, and a screen using the light diffusion sheet, are provided. The method of producing a light diffusion sheet includes transferring an uneven form of a surface of a mold to form a light diffusion layer having an uneven surface; and repeating the transferring step twice or more to stack two layers or more of the light diffusion layers on a substrate.
摘要:
A method for producing a rigid polyurethane foam, which comprises reacting a polyol with a polyisocyanate in the presence of an amine catalyst and a blowing agent, wherein as the amine catalyst, at least one amine compound having at least one type of substituent selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group in its molecule, or N-(2-dimethylaminoethyl)-N′-methylpiperazine, is used, and as the blowing agent, 1,1,1,3,3-pentafluoropropane (HFC-245fa) and/or 1,1,1,3,3-pentafluorobutane (HFC-365mfc) is used.
摘要:
An object of the present invention relates to a catalyst for producing rigid polyurethane foam; wherein the catalyst functions in a process for producing rigid polyurethane foam having excellent adhesive strength and flame retardancy. Another object of the present invention relates to a catalyst for producing rigid polyisocyanurate foam; wherein the catalyst functions in a process for producing rigid polyisocyanurate foam having excellent flame retardancy, adhesive strength, and dimensional stability.
摘要:
A method for producing a rigid polyurethane foam, which comprises reacting a polyol with a polyisocyanate in the presence of an amine catalyst and a blowing agent, wherein as the amine catalyst, at least one amine compound having at least one type of substituent selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group in its molecule, or N-(2-dimethylaminoethyl)-N′-methylpiperazine, is used, and as the blowing agent, 1,1,1,3,3-pentafluoropropane (HFC-245fa) and/or 1,1,1,3,3-pentafluorobutane (HFC-365mfc) is used.
摘要:
A method for producing a rigid polyurethane foam, which comprises reacting a polyol with a polyisocyanate in the presence of an amine catalyst and a blowing agent, wherein as the amine catalyst, at least one amine compound having at least one type of substituent selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group in its molecule, or N-(2-dimethylaminoethyl)-N′-methylpiperazine, is used, and as the blowing agent, 1,1,1,3,3-pentafluoropropane (HFC-245fa) and/or 1,1,1,3,3-pentafluorobutane (HFC-365mfc) is used.