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

Method for producing optically functional film, optically functional film, polarizing plate, optical device and image display

A technology of optical function and manufacturing method, applied in the direction of polarizing elements, chemical instruments and methods, and devices for coating liquid on the surface, etc., can solve the problems of stripe-like spots and dot-like spots with poor appearance, and achieve excellent image display characteristics Effect

Inactive Publication Date: 2007-07-25
NITTO DENKO CORP
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the production of optical functional films used as these optical functional layers, poor appearances such as extremely fine stripe-like spots and dot-like spots sometimes appear on the optical functional films.

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 producing optically functional film, optically functional film, polarizing plate, optical device and image display
  • Method for producing optically functional film, optically functional film, polarizing plate, optical device and image display
  • Method for producing optically functional film, optically functional film, polarizing plate, optical device and image display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0173] A long film made of cellulose triacetate (manufactured by Fujifilm Co., Ltd., TF-80UL, film thickness 80 μm, width 1330 mm, Tg 145° C.) was used as the base film, and the base film was heated to 145° C. A pair of holding members provided on the device clamps both ends of the width direction of the substrate film respectively, and while moving the pair of holding members along the length direction of the substrate film, the distance between the holding members is gradually expanded to 1.1 times (maximum stretch ratio), the substrate film was stretched. Thereafter, it was relaxed so that the interval between the grasping members became 1.09 times (final draw ratio) (that is, the relaxation rate was 0.992 times).

[0174] On the other hand, polyimide (following formula (32), weight-average molecular weight Mw=140,000) was dissolved in methyl isobutyl ketone to obtain a polyimide concentration of 10% by weight and a viscosity of 200 mPa. sec of polyimide solution.

[0175...

Embodiment 2

[0180] As the base film, an optical functional film was produced in the same manner as in Example 1 except that a long film made of cellulose triacetate (manufactured by Fujifilm Co., Ltd., TFY-80UL, film thickness 80 μm, width 1330 mm) was used.

[0181] Observation of the appearance of the prepared optical functional film with the naked eye shows no streaks. Other measurement results are shown in Table 1.

Embodiment 3

[0183] As the base film, an optical functional film was produced in the same manner as in Example 1 except that a long film made of cellulose triacetate (manufactured by Fujifilm Co., Ltd., TFY-80UL, film thickness 80 μm, width 1475 mm) was used.

[0184] Observation of the appearance of the prepared optical functional film with the naked eye shows no streaks. Other measurement results are shown in Table 1.

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a method which is used for manufacturing the optical function film and comprises the following working procedures: a coating procedure for coating the resin solution on the substrate film formed by thermoplastic resin, and a solidifying procedure for solidifying the coated resin to form the resin layer, and the invention is characterized in that before the coating procedure the method comprises a stretching procedure which does stretching at the condition that the substrate film is heated. Therefore the invention can manufacture the optical function film at the condition that the inferior external appearance is not generated.

Description

technical field [0001] The present invention relates to a method for producing an optical functional film, an optical functional film, a polarizing plate, an optical element, and an image display device provided with the optical functional film. Background technique [0002] In recent years, thin, lightweight liquid crystal display devices with low power consumption tend to be used as display devices for OA equipment such as TVs and personal computers. The liquid crystal display device is formed by laminating various optical functional layers such as an optical compensation layer, a hard coat layer, an antireflection layer, and a retardation layer, in addition to a liquid crystal layer or a polarizing plate. Therefore, these optical functional layers not only have to perform the functions suitable for the purpose of each layer, but also, as a precondition thereof, are required not to have adverse effects on the image display of the image display device. [0003] However, wh...

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): G02B5/30B05D3/12B05D7/04B29C55/02B32B27/36G02F1/1335G02F1/13363C08J7/046
CPCB29K2995/0034B29K2001/00B29K2079/08C08J7/047G02F1/133528B05D2201/02B05D3/12B29C55/08Y10T428/249921G02B5/30C08J7/0427C08J7/046G02F1/13363B32B27/36
Inventor 长竹涉近藤诚司冈本启一高村龙一
Owner NITTO DENKO CORP
Features
  • Generate Ideas
  • 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