Check patentability & draft patents in minutes with Patsnap Eureka AI!

Amorphous copolyester, soft substrate and optical film

A copolyester and amorphous technology, applied in the field of optical films, can solve the problems of inability to improve physical properties and reduce the excellent characteristics of raw materials

Active Publication Date: 2013-06-05
IND TECH RES INST
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the blending of two polymers to make optical films, the hidden risk of the two-phase blending is that choosing two unsuitable polymers will not only fail to improve the required physical properties, but in severe cases will also reduce the excellent characteristics of the raw materials

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
  • Amorphous copolyester, soft substrate and optical film
  • Amorphous copolyester, soft substrate and optical film
  • Amorphous copolyester, soft substrate and optical film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] With 166 grams of terephthalic acid (TPA) as the di-acid monomer, 49.6 grams of ethylene glycol (EG, 50mol%) and 98 grams of tricyclodecane dimethanol (TCD, 50mole%) as the diol monomer, After two-stage esterification and polycondensation, a plastic of amorphous polyester (A=0.5, B=0.5) having 0.5 mole fraction of the repeating unit of formula 1 and 0.5 mole fraction of the repeating unit of formula 2 is synthesized Granules, and the intrinsic viscosity measured by Ubbelohde's viscometer was 0.71.

Embodiment 2

[0079] With 166 grams of terephthalic acid (TPA) as the di-acid monomer, 37.2 grams of ethylene glycol (EG, 30mol%) and 137.2 grams of tricyclodecanedimethanol (TCD, 70mole%) as the diol monomer, After two-stage esterification and polycondensation, a plastic of amorphous polyester (A=0.3, B=0.7) having 0.3 mole fraction of the repeating unit of formula 1 and 0.7 mole fraction of the repeating unit of formula 2 is synthesized Granules, and the intrinsic viscosity measured by Ubbelohde's viscometer was 0.70.

Embodiment 3

[0081] With 166 grams of terephthalic acid (TPA) as the di-acid monomer, 21.7 grams of ethylene glycol (EG, 5mol%) and 186.2 grams of tricyclodecanedimethanol (TCD, 95mole%) as the diol monomer, After two-stage esterification and polycondensation, a plastic of amorphous polyester (A=0.05, B=0.95) having 0.05 mole fraction of the repeating unit of formula 1 and 0.95 mole fraction of the repeating unit of formula 2 is synthesized Granules, and the intrinsic viscosity measured by Ubbelohde's viscometer was 0.68.

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 present invention provides a low-birefringence and high-transmittance amorphous polyester film and a manufacturing method thereof. An unstretched sheet is composed of disorderly arranged copolyester formed by a polycondensation reaction of different monomers. The polyester film is manufactured by molding the sheet through a double shaft extension process.

Description

technical field [0001] The present invention relates to copolyesters, and more particularly, the present invention relates to optical films employing such copolyesters. Background technique [0002] Liquid crystal displays use the birefringence properties of liquid crystal molecules and the ability to rotate light to achieve the effect of light and dark display, so there are problems with viewing angle and contrast. As the size of liquid crystal displays increases and their applications vary, they must be viewed from different angles. Therefore, it is necessary to meet the requirements of wide viewing angles. At present, the problem of viewing angle is improved by adding an optical compensation film such as a retardation film. This does not need to change the manufacturing process of the display, but the thickness, birefringence and light transmittance of the retardation film must be effectively controlled. [0003] There are several ways to regulate the birefringence of po...

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): C08G63/183C08G63/199C08G63/42C08L67/02G02B1/04
Inventor 范正欣吕铭聪吕杰夫郑力诚
Owner IND TECH RES INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com