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

Preparation method of ultra-wide polarizing film and polarizing plate

A technology of polarizing film and polarizing plate, which is applied in polarizing elements, optical elements, household appliances, etc. It can solve the problems of affecting optical characteristics, uneven force, and PVA film breakage, so as to improve uniformity and stability and ensure the film surface Flatness, the effect of improving the level of the industry

Pending Publication Date: 2022-07-01
恒美光电股份有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the difficulty of the ultra-wide polarizing plate in the prior art lies in the uniform stability of the alignment extension of the polyvinyl alcohol PVA film
The alignment extension of the PVA film is prone to uneven force, which may cause the breakage of the PVA film and affect the optical properties.

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
  • Preparation method of ultra-wide polarizing film and polarizing plate
  • Preparation method of ultra-wide polarizing film and polarizing plate
  • Preparation method of ultra-wide polarizing film and polarizing plate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] In order to solve the above problems, the present invention provides a method for preparing an ultra-wide polarizing film, comprising the following steps:

[0038] 1) Provide polyvinyl alcohol PVA film;

[0039] 2) at the entrance of swelling groove, dyeing groove, bridging groove, extension groove and adjustment groove, thread-shaped unfolding wheel 1 is all provided, and after described polyvinyl alcohol PVA film is evenly unfolded by described threaded-shaped unfolding wheel 1, Enter the swelling tank, the dyeing tank, the bridging tank, the extension tank and the adjustment tank in sequence, and stretch to 5-7 times longitudinally;

[0040] 3) drying the longitudinally stretched polyvinyl alcohol PVA film in an oven to adjust the moisture content to 10-20% to obtain a polarizing film with a width of 2.2-2.6 m.

[0041] In order to prepare an ultra-wide polarizing plate, the present invention adopts a polyvinyl alcohol PVA film with a width of 4500 mm to 6500 mm and...

Embodiment 1

[0060] (1) A polyvinyl alcohol PVA film with a width of 6000 mm and a thickness of 45 μm was used.

[0061] (2) A set of screw-shaped unfolding wheels are arranged at the entrance of each groove in the polarizing film manufacturing process.

[0062] (3) Swelling stage: the polyvinyl alcohol PVA film is expanded into the swelling tank after being expanded by the above-mentioned threaded unrolling wheel, the groove length of the swelling tank is 20m, the width of the roller is 8000mm, and the polyvinyl alcohol PVA film is in the swelling tank, In contact with water at 40°C, the residence time is 2 to 4 minutes, and the absorption axis direction extends 2 to 3 times;

[0063] (4) Dyeing stage: The polyvinyl alcohol PVA film is fully spread out by the above-mentioned thread unrolling wheel and then enters the dyeing tank to ensure uniform dyeing. The tank length of the dyeing tank is 10m, the width of the roller is 8000mm, and the chemical solution of the dyeing tank is a mixed s...

Embodiment 2

[0071] The difference from Example 1 is that the polarizing film drying oven is provided with 3 sections, and the temperature is stepped up and dried, and the temperatures are 60°C, 70°C, and 80°C, respectively.

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

PropertyMeasurementUnit
widthaaaaaaaaaa
thicknessaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of an ultra-wide polarizing film and a polarizing plate. The preparation method of the polarizing film comprises the following steps: 1) providing a polyvinyl alcohol (PVA) film; (2) after being unfolded through a thread-shaped unfolding wheel, a polyvinyl alcohol (PVA) film sequentially enters a modified swelling tank, a modified dyeing tank, a modified bridging tank, a modified extending tank and a modified adjusting tank, and the PVA film is longitudinally stretched to 5-7 times; and (3) drying the longitudinally stretched PVA film in a drying oven, and adjusting the moisture content to 10-20% to obtain the polarizing film with the breadth of 2.2-2.6 m. The invention further provides an ultra-wide polarizing plate which comprises an upper base material, a polarizing layer and a lower base material, and the polarizing layer is the polarizing film prepared through the method. The width of the polarizer can reach 2.5 m, and the polarization performance is not inferior to the conventional level in the industry, so that the production blank of global large-size liquid crystal display panel polarizers can be filled, the industrial development can be guided, and the level of the domestic polarizer industry can be powerfully improved.

Description

technical field [0001] The invention belongs to the technical field of polarizing plate manufacturing, and particularly relates to a preparation method of an ultra-wide polarizing film and a polarizing plate. Background technique [0002] With the improvement of people's living standards, large-size LCD TVs are more and more popular, and as the core material of panels, the market demand for large-size polarizers is increasing. The domestic wide-format polarizer production technology is backward, and the overall technical level is not high. The main width of the existing polarizer production line is 1.5m, which cannot meet the market demand for large-size TV panels. [0003] Therefore, it is necessary to develop an ultra-wide polarizer, which can maintain the same or even higher optical properties of the polarizer, and ensure that the width can reach 2.5m to meet the requirements of 65-inch to 105-inch or even 110-inch ultra-large liquid crystals. The market demand for displ...

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): B29D11/00G02B5/30
CPCB29D11/00788B29D11/00932G02B5/30
Inventor 王梦杰严兵华张良宝
Owner 恒美光电股份有限公司
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