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

Polarizing plate

A polarizing plate and polarizing film technology, applied in polarizing elements, applications, instruments, etc., can solve the problems of easy cracking and low resistance of polarizing films

Active Publication Date: 2018-02-06
SUMITOMO CHEM CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polarizing film is generally a film made of polyvinyl alcohol-based resin or the like stretched at a high draw ratio, so it has low resistance to cracking and cracking (cracking)
The durability of the polarizing film is improved by bonding the protective film, but it should be noted that the polarizing film is prone to cracks, etc.

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
  • Polarizing plate
  • Polarizing plate
  • Polarizing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0232] Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated more concretely, this invention is not limited to these examples. Hereinafter, parts and % showing the usage amount or content are based on weight unless otherwise specified.

[0233] The thicknesses of the thermoplastic resin film, the polarizing film, and the adhesive layer, the tensile elastic modulus of the thermoplastic resin film, and the storage elastic modulus of the adhesive layer were measured according to the following method.

[0234] (1) Thickness of thermoplastic resin film and polarizing film

[0235] A strip-shaped test piece whose MD length is 50 mm×TD length is the total width is cut out from the film. Next, the thickness of the film was measured at intervals of 100 mm in the film width direction using a digital micrometer "MH-15M" manufactured by Nikon Corporation. Let the average value of the obtained measured values ​​be thickness [mm].

[0236...

manufacture example 1

[0240] (Manufacturing example 1: Preparation of active energy ray-curable adhesive)

[0241] After mixing the cationic curable component (A) and the cationic polymerization initiator (B) shown in Table 1, defoaming was performed to prepare an adhesive as an active energy ray curable adhesive (ultraviolet curable adhesive). Agents 1 and 2. The unit of the compounding quantity of each component in Table 1 is "part".

[0242] [Table 1]

[0243]

[0244] The details of each component shown in Table 1 are as follows.

[0245] [1] Epoxy compound A1-1: special novolak type epoxy resin "157S20" manufactured by Mitsubishi Chemical Corporation,

[0246] [2] Epoxy compound A1-2: neopentyl glycol diglycidyl ether [Z=-CH in the above formula (III) 2 C(CH 3 ) 2 CH 2 -compound of],

[0247] [3] Epoxy compound A1-3: Weight average molecular weight obtained by radically polymerizing a monomer composition composed of 25 parts of glycidyl methacrylate (GMA) and 75 parts of methyl meth...

manufacture example 2

[0250] (Manufacturing example 2: Production of polarizing film)

[0251] A polyvinyl alcohol film manufactured by Kuraray (“PE6000” manufactured by Kuraray Co., Ltd.) was conveyed continuously, and immersed in a swelling bath made of pure water at 20° C. for a residence time of 31 seconds (swelling step). Thereafter, the membrane pulled out from the swelling bath was immersed in a 30° C. dyeing bath containing iodine having a potassium iodide / water ratio of 2 / 100 (weight ratio) for a residence time of 122 seconds (dyeing step).

[0252] Next, the film pulled out from the dyeing bath was immersed in a cross-linking bath at 56° C. with a residence time of 70 seconds in potassium iodide / boric acid / water of 12 / 4.1 / 100 (weight ratio), and then immersed in a crosslinking bath with a residence time of 13 seconds in Potassium iodide / boric acid / water is 9 / 2.9 / 100 (weight ratio) cross-linking bath at 40° C. (cross-linking step). In the dyeing step and the crosslinking step, longitudina...

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
elastic modulusaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention is to provide a polarization plate that is difficult to produce a crack (rupture) of a polarization film caused by a thermal shock. To provide a polarizing plate, which in turn contains first thermoplastic resin film, polarizing film, adhesive layer first, second adhesive layer and second thermoplastic resin film first thermoplastic resin film and second rigid R1t thermoplastic resin rigid R2t film is 0.6MPa, mm3, storage modulus of elasticity of first adhesive on the second layer and the adhesive layer at 80 C for more than 400MPa. Rigid R1t (tensile modulus MPa first thermoplastic resin film at 80 DEG C first thermoplastic resin film thickness or mm) 3, R2t (rigid tensile modulus MPa second thermoplastic resin film at 80 DEG C)*second (heat plastic resin film thickness mm) 3.

Description

technical field [0001] The present invention relates to polarizing plates. Background technique [0002] In general, a polarizing plate has a configuration in which a protective film made of a thermoplastic resin is bonded to one or both surfaces of a polarizing film with an adhesive. Since a polarizing film is generally a film obtained by stretching a film made of a polyvinyl alcohol-based resin or the like at a high draw ratio, it has low resistance to cracks and cracks (cracks). The durability of the polarizing film is improved by bonding the protective film, but it should be noted that cracks and the like are likely to occur in the polarizing film. [0003] Cracks in the polarizing film may occur not only when a mechanical impact is applied to the polarizing film (Patent Document 1), but also when the polarizing film is exposed to rapid temperature changes in the surrounding environment during use. It may also be generated under the action of (thermal shock) (Patent Do...

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): G02B5/30G02B1/14
CPCG02B1/14G02B5/30B32B7/02B32B27/08B32B7/12B32B27/308B32B27/32B32B2307/42B32B2307/536C09J2301/312B32B2551/00
Inventor 久米悦夫
Owner SUMITOMO CHEM CO LTD