Abstract: A microwaveable sheet (1) that prevents permeation of the oil and is superior in moisture permeability, and a production method thereof. The microwaveable sheet (1) has a paper substrate (2), a resin layer (3) laminated through applying a coating liquid of a resin composition on one face of the paper substrate (2), in which the resin layer (3) has a plurality of air holes (3a). The microwaveable sheet (1) preferably has a water vapor transmission rate of from 200 g/m2/24 hrs to 15,000 g/m2/24 hrs. The microwaveable sheet (1) may have air holes (3a) formed by applying a coating liquid on one face of the paper substrate (2) using a roll having an intaglio on the surface thereof, or may have air holes (3a) formed by applying a coating liquid on one face of the paper substrate (1) having a shape with fine irregularity.

Abstract: A polarizing plate has a polarizer and a protective film formed on at least one surface of the polarizer. The protective film is formed by curing an energy ray-curable composition that contains at least one of a first energy ray-polymerizing compound having a bisphenol residue, a second energy ray-polymerizing compound having a neopentylglycol group, a third energy ray-polymerizing compound having a trimethylolpropane group, and a fourth energy ray-polymerizing compound having a pentaerythritol group. In the polarizing plate, though the protective film is thin, the polarizer is protected from the influence of external moisture, etc., and therefore its polarizability is kept good even in high-temperature high-humidity environments.

Abstract: A polyimide compound has a low coefficient of linear thermal expansion comparable to the coefficient of linear thermal expansion of a conductor to be covered by the polyimide. The polyimide compound is less susceptible to contraction caused by dehydration process. The compound is obtained by the reaction of a highly linear acid dianhydride with a highly linear diamine and has a high imidization rate. Having a low coefficient of linear thermal expansion comparable to the conductor to be covered by the polyimide, the polyimide compound of the present invention is less susceptible to contraction that occurs during polyimide formation. The polyimide compound is suitable for making curl-free flexible wiring boards.

Abstract: A polarizing plate is provided in which adhesion properties between a polarizer and a protection film are improved and in which the optical properties of the polarizer are stable under the influence of moisture and the like. Specifically, in polarizing plates 4 and 12, protection films 3 and 11 are formed on at least one side of polarizers 2 and 10, respectively, by curing an energy ray-curable composition. The energy ray-curable composition contains (1) an energy ray-polymerizable compound having a bridged hydrocarbon group, a bisphenol group, a neopentyl glycol group, a trimethylolpropane group, or a pentaerythritol group and (2) a hydrolysate of a silane-based coupling agent. At least one of the polarizing plates 4 and 12 is provided on at least one side of a liquid crystal panel 1, whereby a liquid crystal device 9 is constituted.

Abstract: When an optically anisotropic material is manufactured, an optically anisotropic liquid crystal layer with good adhesion properties and without irregular alignment is formed on a substrate. The optically anisotropic material having the optically anisotropic liquid crystal layer formed on the substrate can be manufactured by subjecting the surface of the substrate to rubbing treatment, subjecting the rubbing-treated surface to surface treatment with the hydrolysate of an alkoxysilane compound, applying a polymerizable nematic liquid crystal composition to the surface-treated surface, subjecting the applied polymerizable liquid crystal composition to alignment treatment, and subjecting the polymerizable liquid crystal composition to curing treatment while the alignment state thereof is maintained, whereby the optically anisotropic liquid crystal layer is formed.

Abstract: A simple technique for introducing a hybrid alignment or a homeotropic (vertical) alignment into liquid crystal films, which, by their nature, tend to have a horizontal alignment of liquid crystal molecules. The technique does not require special alignment films. A liquid crystal composition for forming a liquid crystal film contains a polymerizable liquid crystal compound and a hydrolysate of an alkoxysilane compound. The hydrolysate of the alkoxysilane compound contains a siloxane oligomer of which degree of polymerization is from 2 to 25. Furthermore, the alkoxysilane compound is a trialkoxysilane compound having a functional group. This liquid crystal film composition can be produced by hydrolyzing an alkoxysilane compound to obtain a hydrolysate and then uniformly mixing the hydrolysate with a polymerizable liquid crystal compound.

Abstract: A polyimide compound has a low coefficient of linear thermal expansion comparable to the coefficient of linear thermal expansion of a conductor to be covered by the polyimide. The polyimide compound is less susceptible to contraction caused by dehydration process. The compound is obtained by the reaction of a highly linear acid dianhydride with a highly linear diamine and has a high imidization rate. Having a low coefficient of linear thermal expansion comparable to the conductor to be covered by the polyimide, the polyimide compound of the present invention is less susceptible to contraction that occurs during polyimide formation. The polyimide compound is suitable for making curl-free flexible wiring boards.

Abstract: A simple technique for introducing a hybrid alignment or a homeotropic (vertical) alignment into liquid crystal films, which, by their nature, tend to have a horizontal alignment of liquid crystal molecules. The technique does not require special alignment films. A liquid crystal composition for forming a liquid crystal film contains a polymerizable liquid crystal compound and a hydrolysate of an alkoxysilane compound. The hydrolysate of the alkoxysilane compound contains a siloxane oligomer of which degree of polymerization is from 2 to 25. Furthermore, the alkoxysilane compound is a trialkoxysilane compound having a functional group. This liquid crystal film composition can be produced by hydrolyzing an alkoxysilane compound to obtain a hydrolysate and then uniformly mixing the hydrolysate with a polymerizable liquid crystal compound.

Abstract: Polyimide precursors contained in resin compositions of the present invention have a polymer structure unit represented by formula (1) below: wherein chemical structure A2 includes an alicyclic compound but not an aromatic compound such as a benzene ring so that they provide excellent light transmission over a wide wavelength range. The polyimide precursors are imidized at 7.5% or more and 36% or less so that they are less soluble in developing solutions and therefore are not dissolved in the developing solutions at unexposed parts. Thus, the resin compositions of the present invention can be used to form a resin film having a precise pattern by exposure and development.

Abstract: A polarizing plate has a polarizer and a protective film formed on at least one surface of the polarizer. The protective film is formed by curing an energy ray-curable composition that contains at least one of a first energy ray-polymerizing compound having a bisphenol residue, a second energy ray-polymerizing compound having a neopentylglycol group, a third energy ray-polymerizing compound having a trimethylolpropane group, and a fourth energy ray-polymerizing compound having a pentaerythritol group. In the polarizing plate, though the protective film is thin, the polarizer is protected from the influence of external moisture, etc., and therefore its polarizability is kept good even in high-temperature high-humidity environments.

Abstract: Polyimide precursors contained in resin compositions of the present invention have a polymer structure unit represented by formula (1) below: 1