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

Method for manufacturing double-sided polarizing plate and double-sided polarizing plate manufactured by same

A polarizing plate, a single technology, applied in the direction of chemical instruments and methods, optics, polarizing elements, etc., can solve the deterioration of optical physical properties and reworkability, the deterioration of adhesive strength and peel strength of non-light-irradiated surfaces, and the adhesive layer To solve problems such as different curing degrees, achieve excellent peel strength and appearance characteristics, excellent reprocessing performance, and improve the effect of curing rate

Inactive Publication Date: 2014-12-24
LG CHEM LTD
View PDF12 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a TAC film has a problem in that such a film may be easily deformed under high-temperature and high-humidity conditions
[0005] However, such a water-soluble adhesive may have a problem in that its use is limited to the material of the film because it sticks when an acrylic film or a COP film is used instead of using a TAC film as a protective film. Combined strength is weak
[0006] However, in the case of the related art, when such a water-insoluble photocurable adhesive is applied to a double-sided polarizing plate in which a protective film is attached to both surfaces of the polarizer, formed on both surfaces of the polarizer The adhesive layer should be cured separately, resulting in process difficulties that require performing two photo-irradiation treatments
[0007] At the same time, in order to simplify the manufacturing process, when the adhesive layer formed on both surfaces of the polarizing plate is cured by a single light irradiation treatment, the curing of the adhesive layer due to the difference in the amount of light reaching the light-irradiated surface and the non-light-irradiated surface May vary in degree, resulting in deterioration of bond strength and peel strength on non-light-exposed surfaces
When the adhesive strength of the adhesive layer decreases, the durability of the polarizing plate may decrease, resulting in deterioration of optical physical properties and reworkability

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 manufacturing double-sided polarizing plate and double-sided polarizing plate manufactured by same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0133] Preparation Example 1: Preparation of Transparent Base Film

[0134] A kind of resin composition, will wherein with the weight ratio of 100:2.5:5:5 homogeneously mix poly(N-cyclohexylmaleimide-co-methyl methacrylate) resin, styrene-anhydrous to acid copolymer resins and phenoxy-based resins, and to feed An extruder in which the space from the feed hopper to the extruder was replaced with nitrogen, and melted at 250° C. to prepare feed pellets.

[0135] Use PKFE (MW=60000, Mn=16000, Tg=95°C; purchased from ) as a phenoxy-based resin, Dylaeck332 containing 85% by weight of styrene and 15% by weight of anhydrous maleic acid was used as a styrene-maleic anhydride copolymer resin, and poly(N-cyclohexylmaleic acid) was analyzed by NMR. imide-co-methylmethacrylate) resin, analyzed by NMR. As a result, the content of N-cyclohexylmaleimide was 6.5% by weight.

[0136] The resulting feed pellets were dried under vacuum, melted in an extruder at 260 °C, and passed through a ...

preparation Embodiment 2

[0138] Preparation Example 2: Preparation of Adhesive Composition

[0139] (1) Adhesive composition A

[0140] Add 5 parts by weight of cationic initiator CPI100P (available from Sanapro) and 5 parts by weight of vinyltriethylsilane to 100% by weight of the resin composition to prepare adhesive composition A for polarizing plates, Wherein said 100% by weight resin composition is by adding 25% by weight of 3,4-epoxycyclohexylmethyl-3,4'-epoxycyclohexanecarboxylate (Celloxide 2021P purchased from Dicel), 25% by weight % of 1,4-cyclohexanedimethanol diglycidyl ether and 50% by weight of 3-ethyl-3-[(3-ethyloxetan-3-yl)methoxymethyl] Oxetane (Toa Gosei Aaron Oxetane DOX221).

[0141] (2) Adhesive composition B

[0142] 5 parts by weight of cationic initiator CPI100P (purchased from Sanapro) was added to 100% by weight of the resin composition to prepare adhesive composition B for polarizing plates, wherein the 100% by weight of the resin composition was 25% by weight of 1,4-cyc...

Embodiment 1

[0146] The primer layer of the two-layer acrylic film prepared in Preparation Example 1 was coated with the adhesive composition A using a micro gravure coater so that the final thickness of each adhesive layer was 1 μm. Thereafter, both acrylic films coated with the adhesive composition were laminated to both surfaces of the PVA element. Then, adopt UV irradiation system (fusion lamp, D lamp) to 200mJ / cm 2 Ultraviolet light of a certain amount of light irradiates one surface of the PVA element in one direction, and at the same time closely adheres the surface of the acrylic film opposite to the UV irradiation system to the roller. The temperature of the drum was adjusted to 20° C. to manufacture a polarizing plate.

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
glass transition temperatureaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for manufacturing a double-sided polarizing plate and a double-sided polarizing plate manufactured using the same, the method comprising the steps of: stacking transparent films on both surfaces of a polarizer via adhesive layers; radiating active energy rays at a quantity of light of 200mJ / cm2 or higher through an energy source which is positioned in one direction with reference to the polarizer; and processing the surface of the transparent film, which is positioned opposite the energy source, at 10 DEG C to 25 DEG C.

Description

technical field [0001] The invention relates to a method for manufacturing a double-sided polarizing plate and a double-sided polarizing plate manufactured by the method. Background technique [0002] A polarizer is a device configured to convert natural light into polarized light with a specific vibration direction. In recent years, polarizing plates have been applied to various display devices, such as liquid crystal display (LCD) devices, organic light emitting diode (OLED) devices, and the like. [0003] Such a polarizing plate is generally used in a structure in which a protective film is bonded by an adhesive to one or both surfaces of a polarizer based on polyvinyl alcohol (PVA) dyed with a dichroic dye or iodine PVA) resin formed. According to the related art, a triacetyl cellulose (TAC)-based film has been widely used as a protective film configured to protect such a polarizing plate. However, such a TAC film has a problem in that such a film may be easily deform...

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): G02B5/30
CPCG02B5/3025G02B5/305B32B37/06B32B37/12B32B38/0008B32B2037/1253B32B2307/42B32B2309/02B32B2310/0831B32B2363/00B32B2383/00G02B1/12
Inventor 许恩树徐银美朴光承李美潾赵镛一
Owner LG CHEM 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