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Osaka, Japan

Nitto Denko Corporation is a Japanese company which produces tapes, vinyl, LCDs, insulation, and several other products. It was founded in 1918 to produce electrical insulation and it survived World War II, despite the destruction of its central offices. Wikipedia.


The method for producing the porous sheet of the present invention includes the steps of (I) preparing a plurality of sheet materials that contain polytetrafluoroethylene and carbon particles and (II) stacking the plurality of sheet materials over one another and rolling the stacked sheet materials. In the method for producing the porous sheet of the present invention, step (I) and step (II) may be repeated alternately. Further, as the sheet materials to be used in the production method of the present invention, a base sheet obtained by forming a mixture containing polytetrafluoroethylene and carbon particles into sheet form also can be used, or a laminated sheet obtained by stacking a plurality of base sheets over one another and rolling them also can be used, for example.


A pressure-sensitive adhesive optical film of the invention includes an optical film; and a pressure-sensitive adhesive layer placed on at least one side of the optical film, wherein the pressure-sensitive adhesive layer is a product formed by applying a pressure-sensitive adhesive coating liquid having a dissolved oxygen concentration of 0.02 to 3 mg/L and then drying the pressure-sensitive adhesive coating liquid. The pressure-sensitive adhesive optical film can satisfy heat durability, humidity durability, and high contrast.


The present invention provides a thin polarizing film which has only a small environmental load and has excellent optical characteristics. The thin polarizing film is produced by forming a polyvinyl alcohol-based resin layer on a thermoplastic resin substrate. The thin polarizing film has a thickness of 10 m or less, a single axis transmittance of 42.0% or more, a polarization degree of 99.95% or more, and an iodine content of 17.6 grams per 400700 square millimeters or less, which is measured by an ion chromatography method.


Patent
Nitto Denko Corporation | Date: 2015-07-31

The present invention provides a method of inputting light into a core layer of a multimode optical waveguide. The optical waveguide includes an under-cladding layer; and the core layer formed so that at least a part of the core layer is adjacent to the under-cladding layer. The method includes inputting the light into the core layer so that a spot of the light at an input port-side end surface of the multimode optical waveguide completely includes an input port of the core layer; a spot area of the light at the input port-side end surface of the multimode optical waveguide is twice or more of an area of the input port of the core layer; and an angle of input range of the light at an input port end surface of the core layer is from 10 to 30.


Patent
Nitto Denko Corporation | Date: 2015-02-06

Provided is a coating apparatus that included a coating unit that coats a target to be coated with a coating liquid; a housing unit that houses the coating liquid to be supplied to the coating unit; and a conduit that supplies the coating liquid from above into the housing unit, in which the conduit has an end portion on a side through which the coating liquid is discharged, the end portion being provided with an opening portion through which the coating liquid is discharged, and a bent portion that is bent so as to have the opening portion directed upward.

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