Molded laminate for optical use

A molding layer, optical technology, applied in the field of molding laminates, can solve the problems of uneconomical production methods, unpredictable color tone changes, etc., and achieve the effect of high polarization degree

Active Publication Date: 2009-07-29
中越 康亘 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] According to the prior art, in order to provide enhanced polarizing properties to the film, the color of the polarizing film is deep, therefore, even if photochromic properties are provided to the lens, no significant hue change can be expected
In addition, this production method is not economical because a polarizing film must be prepared for each of a large number of different color developing lenses

Method used

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  • Molded laminate for optical use
  • Molded laminate for optical use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Used from Sumitomo Chemical Company, Limited called The polarizer of SQ-1852A has a thickness of 0.18 mm and a light transmittance of 43.7%. The polarizer includes first and second cellulose triacetate films on respective opposing surfaces of a polyvinyl alcohol polarizing film dyed with an iodine-based dye (dye stuff), each of the first and second cellulose triacetate films Has a thickness of 0.08mm. The polarizing film had a thickness of 0.02 mm and a degree of polarization of 99.95%. Bonding a polycarbonate resin film having a thickness of 0.15 mm and having a light transmittance of 89% to the exposed surface of the first cellulose triacetate film of the polarizer by using a two-component type polyurethane resin as an adhesive, The polycarbonate resin film is compatible or fusible with lens forming polycarbonate resins.

[0051] Then, a third cellulose triacetate film that does not contain an ultraviolet absorber and has a thickness of 0.05 mm is bonded to the ex...

Embodiment 2

[0055] A polyallyl ester-based film was bonded to the exposed surface of the first cellulose triacetate film of the same polarizer as used in Example 1 by using a two-component polyether polyurethane resin adhesive, the polyolefin The acrylic film had a thickness of 0.14 mm, exhibited a light transmission of 88%, and was compatible or fusible with lens forming polyallyl resins.

[0056] Then, on the exposed surface of the second cellulose triacetate film, an adhesive is applied to a thickness of 0.01 mm, through which the third cellulose triacetate that does not contain an ultraviolet absorber and has a thickness of 0.05 mm The film was bonded to a second cellulose triacetate film, whereby a laminated sheet was obtained. The adhesive used to bond the third cellulose triacetate film to the second cellulose triacetate film is 1-(2-methoxy-5-nitrobenzyl)-3,3-di Methylspiro[indoline-2,3′-(3H)-naphtho(2,1-b)-pyran] 1.5% by weight two-component polyester polyurethane resin, the wei...

Embodiment 3

[0060] The polycarbonate resin and polybutylene terephthalate were uniformly blended in a weight ratio of 60:40, thereby preparing a transparent thermoplastic film having a thickness of 0.2 mm. On the transparent plastic film thus prepared, the same two-component polyether polyurethane adhesive containing a photochromic compound as used in Example 1 was applied to a thickness of 0.02 mm, and on the adhesive A cellulose triacetate film containing no ultraviolet absorber and having a thickness of 0.05 mm was placed to form a laminated sheet.

[0061] The laminate was heat bent to a shape in which the exposed cellulose triacetate film exhibited a convex surface and the exposed surface of the thermoplastic film exhibited a concave surface. The heat-bent laminate was placed in an injection mold, and the same resin as that of the thermoplastic film was injected on the exposed surface of the thermoplastic film, thereby forming an optical lens having a thickness of 2.0 mm.

[0062] I...

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Abstract

A polarizing sheet (A) includes a polarizing film ( 2 ) and cellulose triacetate films ( 6, 6 ') bonded to opposing surfaces of the polarizing film ( 2 ) with adhesive layers ( 4, 4 ') interposed, respectively. A thermoplastic film ( 10 ) is stacked on the exposed surface of one ( 6 ') of the cellulose triacetate films. Another cellulose triacetate film ( 14 ) free of an ultraviolet absorber is bonded to the exposed surface of the other cellulose triacetate film ( 6 ) of the polarizing sheet with an adhesive ( 12 ) containing an organic photochromic compound, to thereby form a laminate sheet. The laminate sheet is placed in an injection mold, and a molding resin material fusible with the thermoplastic film ( 10 ) is injected over the thermoplastic film.

Description

technical field [0001] The present invention relates to molded laminates for use in the manufacture of lenses such as polarized lenses and sunglass lenses, which molded laminate exhibits polarizing properties and for example allows the laminate to develop color by absorbing light and lose color when light is blocked. Photochromic properties exhibiting variable light transmission. Background technique [0002] Recently, in the spectacle lens market, demand for eye-friendly lenses capable of protecting eyes has increased. Many spectacle lenses are glass lenses, but currently plastic lenses are mainly used because they protect the eyes from accidents caused by broken lenses. In addition, the material of the plastic lens has been improved so that the lens will hardly shatter. [0003] The lens is required to have a high refractive index and be thin and light, to block harmful light from entering the eyes by blocking ultraviolet rays or to have polarization properties, and to h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/10G02C7/12B29C45/14G02B5/30
CPCG02B5/23G02C7/12B29C45/14B29C2045/14319G02B5/3033B29L2011/0016B29C45/14811G02F2202/14B29C2045/14237G02B5/3041
Inventor 中越康亘
Owner 中越 康亘
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