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Scratch resistant polarizing articles and methods for making and using same

A product and light polarization technology, which is applied in the field of light polarization products, can solve problems such as cracks in the dichroic dye layer, complex delamination and damage

Inactive Publication Date: 2015-08-26
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when the indenter is brought close to a rigid substrate, the stress field produces cracks, delamination, or complex damage to the dichroic dye layer
In some cases, the dichroic dye layer is partially or completely removed from the substrate, resulting in clear colorless dots on a black background, which are aesthetically unacceptable

Method used

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  • Scratch resistant polarizing articles and methods for making and using same
  • Scratch resistant polarizing articles and methods for making and using same
  • Scratch resistant polarizing articles and methods for making and using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Part A: Preparation of a UV-curable acrylic coating composition to achieve a thick polymer first layer:

[0076] The coating liquid was obtained by mixing about 90 parts by mass of Ebecryl 264 (a urethane acrylate oligomer manufactured by Cytec Industries), about 40 parts by mass of Ebecryl 294 / 25 ( urethane acrylate oligomer manufactured by Setek Industries Co., Ltd.), about 20 parts by mass of [3-(methacryloyloxy)propyl]trimethoxysilane (Dow Corning (Dow Corning) product Z-6030), about 49.2 parts by mass of hexanediol diacrylate, about 6.44 parts by mass of Irgacure 184 (Ciba) and about 1.64 parts by mass of Irgacure 819 (Ciba )) for mixing.

[0077] Part B: Preparation of Polarized Glass Lens:

[0078] A clean chemically tempered glass lens (GS15, Corning) was brushed with a wheel of suitable shape and made of polyurethane foam. The wheel is saturated with abrasive slurry, resulting in parallel microgrooves on the coated lens surface.

[0079] The abrasive sl...

Embodiment 4

[0098] Example 4: Lens Characteristics

[0099] Polarization efficiency:

[0100] Polarization efficiency (Peff) was determined by measuring parallel transmittance (T / / ) and perpendicular transmittance (T┴) using a visible light spectrophotometer and a polarimeter. The polarization efficiency was calculated using the following formula: Peff(%)=[(T / / -T┴) / (T / / +T┴)]×100.

[0101] Scratch and indentation resistance:

[0102] Scratch resistance and indentation resistance tests were performed using a durometer hardness tester (hardness test pencil model 318 / 318S purchased from Erichsen). Briefly, the test consists of drawing a hemisphere on the surface with a tungsten carbide tip (approximately 0.75 mm radius) with a defined constant force.

[0103] Visible markings on the surface after drawing with a tungsten carbide tip at a load of about 5 Newtons indicated a failure in surface hardness and were rated "X", while lenses that showed no scratches were rated "O".

[0104] I...

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Abstract

Disclosed herein are light polarizing articles that include a substrate, a light polarizing layer disposed on a surface of the substrate, a thick polymer layer disposed on the light polarizing layer, and at least one anti-scratch layer disposed on the thick polymer layer. The thick polymer layer serves as a buffer layer that, when combined with a thin abrasion-resistant coating, permits substantially improved resistance to scratching and indentation. The improved indentation resistance is exhibited even when being indented with sharp objects. The light polarizing articles can be used, for example, as ophthalmic products and in display devices. Methods of making and using the light polarizing articles are also disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application Serial No. 61 / 716,478, filed October 19, 2012, which is hereby incorporated by reference in its entirety, as detailed below. technical field [0003] The present invention generally relates to light polarizing articles. More specifically, various embodiments described herein relate to light polarizing articles having improved scratch and indentation resistance, and methods of making and using the same. Background technique [0004] There is significant interest in light polarizing articles, in part because of their unique ability to selectively eliminate glare reflected from smooth horizontal surfaces (eg, water, ice, etc.). [0005] Dichroic materials are well suited for use in light polarizing articles, such as ophthalmic products and displays, because such materials, when properly oriented, can preferentially transmit light polarized in a particular dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B5/305G02B1/105G02B1/14
Inventor F·M·迪瑞斯D·亨利
Owner CORNING INC
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