Unlock instant, AI-driven research and patent intelligence for your innovation.

Manufacturing method of polarizing film

A manufacturing method and polarizing film technology, applied in polarizing components, instruments, optics, etc., can solve the problems of polarizing film wrinkles and uneven dyeing of polarizing films, and achieve the effect of reducing bending and uneven dyeing

Active Publication Date: 2020-11-10
SUMITOMO CHEM CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, bends and wrinkles occur on the polarizing film, thereby causing uneven dyeing on the polarizing film

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
  • Manufacturing method of polarizing film
  • Manufacturing method of polarizing film
  • Manufacturing method of polarizing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.

[0046] figure 1 It is a schematic block diagram which shows one Embodiment of the manufacturing apparatus of the polarizing film of this invention. Such as figure 1 As shown, the polarizing film manufacturing device 5 has: two swelling tanks 11, 12, which carry out swelling treatment to the polyvinyl alcohol-based film 2 (hereinafter referred to as the PVA-based film 2); a dyeing tank 20, which passes through the two swelling tanks. The PVA-based film 2 after 11 and 12 is dyed; and stretching rollers 61 and 62 stretch the PVA-based film 2 passing through the swelling tanks 11 and 12 . It should be noted that the number of swelling tanks may be not two but one or more than three.

[0047] Polarizing Film Manufacturing Method The PVA-based film 2 is sequentially subjected to swelling treatment and dyeing treatment to manufacture the polarizing film 3 . The swell...

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
thicknessaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
Login to View More

Abstract

The present invention provides a method for producing a polarizing film capable of reducing the bending and folding of a polyvinyl alcohol film. The method for producing the polarizing film is a method of producing a polarizing film by subjecting a polyvinyl alcohol film to a swelling treatment and a dyeing treatment, wherein the swelling treatment is carried out by successively passing the n-like swelling grooves , Where n is a natural number, the initial width of the polyvinyl alcohol-based film is W in the swelling treatment, and the final width of the polyvinyl alcohol film when the n-th swelling tank comes out is X, and at all (W-X) / W / A no greater than 0.05 is satisfied when the cumulative extension ratio in the swelling tank is set to A.

Description

technical field [0001] The present invention relates to a method for manufacturing a polarizing film. Background technique [0002] Conventionally, the manufacturing method described in Unexamined-Japanese-Patent No. 2006-267153 (patent document 1) is known as a manufacturing method of a polarizing film. The manufacturing method of this polarizing film manufactures a polarizing film by sequentially performing swelling processing, dyeing processing, and fixation processing to a polyvinyl alcohol-type film. And, including the step of sequentially immersing the polyvinyl alcohol-based film in a plurality of swelling treatment tanks, by setting the liquid temperature of the solution in the swelling tank on the downstream side to be higher than the liquid temperature of the solution in the swelling tank on the upstream side by more than 7°C to obtain a polarizing film with uniform optical properties. [0003] prior art literature [0004] patent documents [0005] Patent Docu...

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 Patents(China)
IPC IPC(8): G02B5/30
CPCG02B5/3033
Inventor 松久英树座间俊明
Owner SUMITOMO CHEM CO LTD