Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing polarizer

A technology for polarizers and polarizers, applied in the field of polarizers, can solve the problems of difficulty in cross-linking, difficulty in ensuring dimensional stability, difficulty in manufacturing polarizers, etc., to prevent film wrinkling, excellent durability, and improve pinning efficiency. Effect

Inactive Publication Date: 2012-01-11
DONGWOO FINE CHEM CO LTD
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the aldehyde group is easily reduced or oxidized in the air, crosslinking is not easily performed and it is difficult to ensure dimensional stability in the lateral direction
In addition, the above-mentioned techniques have difficulties in manufacturing polarizers due to the characteristic (pungent) odor of polyaldehyde compounds

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing polarizer
  • Method for preparing polarizer
  • Method for preparing polarizer

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The method for preparing a polarizer according to the present invention may include the steps of: first crosslinking by dipping a polyvinyl alcohol film into a first crosslinking solution containing a boron compound; and by dipping the polyvinyl alcohol film into a first crosslinking solution containing a boron compound; The second crosslinking is carried out in a second crosslinking solution of a linear polycarboxylic acid compound containing at least two carboxyl groups.

[0028] According to the present invention, the polarizer refers to a conventional iodine polarizer comprising a polymer film and iodine adsorbed and oriented in the polymer film.

[0029] The polymer film used to prepare the polarizer may include, but is not particularly limited to, any film capable of being dyed with iodine. Specific examples of the polymer film may include: polyvinyl alcohol film and / or partially saponified polyvinyl alcohol film; hydrophilic polymer film such as polyethylene tere...

Embodiment 1

[0087] A transparent unstretched polyvinyl alcohol film (VF-PS, Kuraray Chemical Co. Ltd.) having a degree of saponification of 99.9% or more was immersed in water (deionized water) at 30°C for 2 minutes to swell. After the above immersion and swelling, the treated membrane was stained by dipping in a staining solution containing 3.5 mmol / L of iodine and 2% by weight of potassium iodide at 30° C. for 4 minutes. At this time, the membrane was stretched to 1.3 times and 1.4 times during swelling and dyeing, respectively. Next, the dyed membrane was immersed in a first cross-linking solution containing 10% by weight of potassium iodide and 3.5% by weight of boric acid at 50°C for 2 minutes (the first cross-linking step), and then, at 50°C in a solution containing 10% by weight of boric acid Potassium iodide, 3.5% by weight of boric acid and 1% by weight of glutaric acid in the second crosslinking solution for 1 minute (second crosslinking step), thereby performing a crosslinking ...

Embodiment 2

[0090] The same procedure described in Example 1 was repeated except that the second crosslinking solution contained 3% by weight of glutaric acid.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a polarizer preparing method, specifically, a method for preparing a polarizer. The method comprises the following steps of performing first crosslinking through an inorganic cross-linking agents; performing second crosslinking through organic cross-linking agents so as to effectively enhance the crosslinking reactions; and then preparing a polarizer having multiple advantages. The advantages include, for example, excellent optical performances, film rupture and wrinkling prevention, area increase and thickness decrease, and stability of height size in the longitudinal and the horizontal directions, etc. The method disclosed in the invention can achieve desired technique processability and production efficiency.

Description

technical field [0001] This application claims the benefits of Korean Patent Application No. 10-2010-0054758 filed with the Korean Intellectual Property Office on June 10, 2010 and Korean Patent Application No. 10-2010-0132164 filed with the Korean Intellectual Property Office on December 22, 2010 Priority, the entire disclosure of which is hereby incorporated by reference. [0002] The present invention relates to a polarizing plate having excellent optical properties and other advantages such as prevention of film cracking and wrinkling, area enlargement and thickness reduction, high dimensional stability, etc., and a method of manufacturing the polarizing plate, so The method can improve processability and increase production efficiency. Background technique [0003] In order to improve the color reproducibility and brightness of images of various image display devices such as LCD, electroluminescence (EL) display, plasma display panel (PDP), field emission flat panel di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J3/24C08F16/06G02B5/30
Inventor 李宗锡崔允硕柳智熙赵成祐
Owner DONGWOO FINE CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com