Mitsubishi Gas Chemical Company, Inc.

Mgc Filsheet Co., Ltd.

Japan Acryace Corporation

Nippon Kayaku Kabushiki Kaisha

Arisawa Mfg. Co., Ltd.

Katsuyuki Murai

Yukio Kokuzawa

Hideaki Kimura

Kyousuke Nakamura

Shinpei Arita

Takahiro Matsumoto

Kouichi Tanaka

Makoto Takahashi

Shotaro Ohno

Masahiro Harada

Katsuya Maruyama

Takashi Fujii

Yoshiyuki Yahagi

Hideyoshi Fujisawa

Masayuki Akaki

Takuya Gotou

Mitsuhiro Akiyama

Kazuhisa Mitsuhata

Tetsuji Moroiwa

Yasuhiro Maeda

Norifumi Tashiro

Kenta Nonaka

Humiaki Kakeya

Provided is a functional polyamide sheet in which air bubbles are not generated or are reduced in a polarizing and/or photochromic functional sheet when the polarizing and/or photochromic functional sheet are/is manufactured using a sheet or film formed by a polyamide resin as a protective layer, and a functional polyamide lens using the functional polyamide sheet. Provided are a polyamide functional sheet obtained by disposing a protective layer formed by a transparent plastic sheet or film on at least one surface of a functional layer, which is a polyvinyl alcohol-based polarizing film layer, a photochromic layer, or a combination of these layers, with an adhesive layer being interposed therebetween, in which the protective layer is a sheet or film formed by a polyamide resin, and an oxygen transmission rate at 23&#xb0; C. and 85% RH is 50 cm/m&#xb7;24 hr&#xb7;bar or more, and a functional polyamide lens using the polyamide functional sheet.

Functional sheet

A degradation agent for viscous fluids to be used in hydraulic fracturing methods is provided according to one aspect of the present invention, the degradation agent comprising a persulfate and an iron salt serving as an activator for the persulfate, wherein the persulfate and the iron salt have been coated and the ratio of the coating-film thickness (Y) in the iron salt to the coating-film thickness (X) in the persulfate, Y/X, is in the range of 0.35 to 1.0. The degradation agent for viscous fluids has properties suitable for use in hydraulic fracturing methods.

Degradation agent for viscous fluid and method for producing said degradation agent

According to the present invention, a synthetic resin laminate comprising two transparent synthetic resin layers (A), two or more functional layers (B) having photochromic properties interposed between the two synthetic resin layers (A), and a transparent resin layer (C) interposed between the two or more functional layers (B), wherein the functional layer (B) is a cured layer comprising a photochromic dye and obtained from a diisocyanate and a polyol can be provided.

Synthetic resin laminate having photochromic properties and lens using same

[Problem] The present invention provides eyewear, such as polarized sunglasses, having cholesteric liquid crystal layers, wherein the eyewear has a metallic tone and antiglare properties, minimizes the reduction in light-polarizing element absorptive capability that is associated with circular polarization, and is moreover unaffected by external degrading factors such as sebum, moisture, and salt air. [Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.

Optical film and optical laminate using same

In a resin film configured to have a cured product layer formed from a curable resin composition on the surface of a substrate, the present invention aims to ensure not only the processability and other properties of the resin, but also the performance required for recent high-hardness coating films. The above problem was solved by a curable resin composition comprising the intended polyfunctional urethane (meth)acrylate oligomer, which is capable of forming a cured product layer when applied to and cured on a resin substrate.

Polyfunctional urethane (meth)acrylate and curable resin composition thereof

A highly diffusing plastic sheet having a thickness of from 1 to 5 mm, a haze of 80% or more and a total light transmittance of 80% or more, which includes at least one diffuser layer A, two or more diffuser layers B, and optionally a diffusing agent-free layer C. The diffuser layer A is formed from a first matrix plastic and a first light-diffusing fine particle having an average particle size of from 2 to 6 &#x3bc;m and a refractive index of from X&#x2212;0.02 to X+0.02 wherein X is a refractive index of the first matrix plastic. The diffuser layer B is formed from a second matrix plastic and a second light-diffusing fine particle having an average particle size of from 10 to 18 &#x3bc;m and a refractive index of from Y&#x2212;0.03 to Y+0.03 wherein Y is a refractive index of the second matrix plastic.

Plastic sheet

A lens sheet for use as a Fresnel lens sheet or a lenticular lens sheet of rear projection screens, which includes a plastic substrate and a lens element disposed on the plastic substrate. The plastic substrate includes at least a first surface layer, an intermediate layer and a second surface layer. Each of the first surface layer and the second surface layer has a saturated water absorptivity higher than that of the intermediate layer.

Lens sheets for rear projection screens

A Fresnel lens sheet comprising a Fresnel lens substrate and a Fresnel lens, whose surface of the light source side has an average pitch of 200 &#x3bc;m or smaller and ten point roughness of 3 to 15 &#x3bc;m, a rear projection screen obtained by assembling the Fresnel lens sheet and a lenticular lens sheet, and a process for producing these. With the use of the Fresnel lens sheet and the rear projection screen in accordance with the present invention, a labyrinth light inside the screen and a surface reflection are diffused effectively and a ghost caused by them is remarkably reduced. Accordingly, the rear projection television employing the Fresnel lens sheet and the rear projection screen of the present invention provides excellent images without ghost light.

Fresnel lens sheet and rear projection screen

The invention relates to a multi-layer film comprising a layer (A) made of a polyamide (a), a layer (B) made of a mixed polyamide (b.sub.3) of a polyamide (b.sub.1) and an aliphatic polyamide (b.sub.2), a layer (C) made of an adhesive polyolefin (c.sub.1) or a mixed resin (c.sub.3) of an adhesive polyolefin (c.sub.1) and a polyolefin (c.sub.2), and a layer (D) made of a polyolefin (d), wherein

Multi-layer film

Growing community of inventors

Kanagawa, Japan

Katsuyuki Murai