Daicel-evonik Ltd.

Toshihiko Fujinaka

Daisuke Fujiki

Masakazu Tokunaga

HItomi Omae

The present invention provides a thin sheet with suppressed strain. The sheet according to the present invention has a thickness from 0.1 to 5 mm and is formed of a plastic that contains at least one resin selected from polyamide resins, polycarbonate resins, cellulose acrylate resins, and acrylic resins. A difference between a maximum value and a minimum value of retardation of the sheet is 3000 nm or less. The sheet according to the present invention can be obtained, for example, by subjecting a plastic containing at least one resin selected from polyamide resins, polycarbonate resins, cellulose acylate resins, and acrylic resins to extrusion molding to obtain a plastic in the form of a sheet, and subjecting the resulting plastic in the form of a sheet to vacuum forming, air-pressure forming, or vacuum air-pressure forming.

Sheet and method for producing sheet

Provided is a polarizing sheet that can precisely impart a desired curved shape without causing whitening when bending is carried out. A polarizing sheet of an embodiment of the present invention having a structure in which a polyamide resin film (), a polarizing film, and a polyamide resin film () are laminated in this order, wherein a retardation value of the polyamide resin film () is from 10 to 3000 nm, and the retardation value of the polyamide resin film () and a retardation value of the polyamide resin film () satisfy Formula (r):[Retardation Value of Polyamide Resin Film (1)]−[Retardation Value of Polyamide Resin Film (2)]≥10 nm   (r).

Polarizing sheet and polarizing lens provided with same

Provided is a laminate that generates a structural color, where the laminate can be subjected to a deep-drawing process without deteriorating the color developing structure of the structural color. The laminate according to an embodiment of the present invention includes a polyamide layer () and a thermoplastic polyurethane layer () having a color developing structure of a structural color. The thermoplastic polyurethane layer () is preferably a thermoplastic polyurethane layer having a structure having recesses and protrusions on a face that is opposite a face in contact with the polyamide layer () or a layer formed by alternately laminating two types of thermoplastic polyurethanes having a difference in refractive indexes of 0.03 or greater.

Laminate

A functional lens which effectively prevents the separation of a functional layer in a fitting operation of a multilayer functional lens to a frame, and a pair of functional glasses with the lens are provided. The functional lens comprises a lens body and a laminate on the lens body. The laminate comprises, in sequence, a first thermoplastic resin layer, a first adhesive layer, an optically functional layer (e.g., a polarizing film), a second adhesive layer, and a second thermoplastic resin layer. The functional lens is to be fitted in a groove of a frame. The functional lens has an edge face having a shape with a peak. The peak of the edge face is positioned at a fitting side (the lens body side) relative to the first adhesive layer.

Functional lens and functional eyeglasses provided with same

A functioning optical lens includes a molded polyamide layer, and an optical sheet including a polyamide sheet layer and an optical film layer. Such a functioning optical lens may be prepared by bending an optical sheet including an optical film layer and a polyamide sheet layer, and injection molding a polyamide composition onto the bent polyamide sheet layer so as to thermally fuse the polyamide composition and the polyamide sheet layer with each other.

Growing community of inventors

Himeji, Japan

Toshihiko Fujinaka