Functional sheet including polyester resin, and lens using functional sheet

Patent metadata

Field	Value
Publication number	US-10816699-B2
Application number	US-201515528899-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Dec 4, 2014
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The present invention provides a functional sheet including a functional layer provided between protective layers. The functional layer is a polarizing film layer, a photochromic layer, or a combination of the polarizing film layer and the photochromic layer. At least one of the protective layers includes a layer formed of a resin (C) containing a polyester resin (A) obtained as a result of polycondensation of 1,4-cyclohexanedimethanol and 1,4-cyclohexanedicarboxylic acid and an aromatic polycarbonate resin (B), the polyester resin (A) being contained at a content of 10 to 100 parts by mass and the aromatic polycarbonate resin (B) being contained at a content of 0 to 90 parts by mass with respect to 100 parts by mass as a total of the polyester resin (A) and the aromatic polycarbonate resin (B). A lens is provided with such a functional sheet.

First claim

The invention claimed is:

1. A lens in which a functional sheet is bent to be spherical or aspherical, said functional sheet comprising:
a functional layer provided between a protective layer I and a protective layer II, the functional layer being a polarizing film layer, a photochromic layer, or a combination of the polarizing film layer and the photochromic layer;
wherein the protective layer I and the protective layer II each includes a layer consisting of a resin (C) consisting of (i) a polyester resin (A) obtained as a result of polycondensation of 1,4-cyclohexanedimethanol and 1,4-cyclohexanedicarboxylic acid and (ii) an aromatic polycarbonate resin (B) and (iii) optionally at least one additive selected from the group consisting of a thermal stabilizer, a hydrolysis stabilizer, an antioxidant, a pigment, a dye, a reinforcing agent, a filler, an ultraviolet absorber, a lubricant, a releasing agent, a crystal nucleating agent, a plasticizer, a fluidity modifier, an antistatic agent, and an antibacterial agent, the polyester resin (A) being contained at a content of 20 to 40 parts by mass and the aromatic polycarbonate resin (B) being contained at a content of 60 to 80 parts by mass with respect to 100 parts by mass as a total of the polyester resin (A) and the aromatic polycarbonate resin (B),
wherein each of the protective layer I and the protective layer II has a thickness of 100 μm to 800 μm and combined total thickness of the protective layer I and the protective layer II is 200 μm to 1600 μm.

2. The lens according to claim 1 , wherein the functional sheet and a layer forming an aromatic polycarbonate resin is stacked to be integrated together, and wherein the functional sheet is a front surface layer.

3. The lens according to claim 1 , wherein the functional sheet is bent at a convexed surface, and a transparent resin is injection-molded to be put on a concaved surface of the functional sheet and integrated with the functional sheet.

4. A colored lens obtained as a result of the lens according to claim 1 being dyed.

5. The lens according to claim 1 , wherein the lens includes a hard coat.

6. An eyewear item including the lens according to claim 1 .

Assignees

• Mitsubishi Gas Chemical Co
• Mgc Filsheet Co Ltd

Inventors

• Nakamura Kyousuke
• Gotou Takuya
• Tsuruya Hirotaka
• Mitsuhata Kazuhisa

Classifications

• B29K2995/0034

  Polarising · CPC title

• B29K2995/0026

  Transparent · CPC title

• B29K2995/002

  Coloured · CPC title

• B29K2995/0018

  having particular optical properties, e.g. fluorescent or phosphorescent · CPC title

• B29K2669/00

  Use of {PC, i.e.} polycarbonates {or derivatives thereof} for preformed parts, e.g. for inserts · CPC title