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

Stretched multilayer thermoplastic resin film

A thermoplastic resin and stretch film technology, applied in the direction of synthetic resin layered products, laminated, layered products, etc., can solve the problems of easy increase in birefringence, poor appearance, insufficient continuous productivity, etc., and achieve excellent continuous productivity Effect

Active Publication Date: 2018-09-28
MITSUBISHI GAS CHEM CO INC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even in the stretched film of Patent Document 2, it is necessary to add a large amount of ultraviolet absorber in order to obtain the required UV cut-off property. Therefore, roll contamination may occur due to exudation of the ultraviolet absorber during film production, causing the Insufficient continuous productivity
[0007] In addition, in the conventional stretched film, since the degree of orientation becomes high when the stretching temperature is low during the stretching process, sufficient mechanical properties are easily obtained, but the birefringence tends to increase, and when the stretching temperature is too low, The film sometimes breaks during stretching
On the other hand, if the stretching temperature is high, the degree of orientation is suppressed low, so although the increase in birefringence is suppressed, it is difficult to obtain sufficient mechanical properties. During stretching, the film will break or the appearance will deteriorate

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
  • Stretched multilayer thermoplastic resin film
  • Stretched multilayer thermoplastic resin film
  • Stretched multilayer thermoplastic resin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] Hereinafter, the present invention will be specifically described using examples. However, the present invention is not limited by these Examples and Comparative Examples. The thermoplastic resin laminated stretched films obtained in Examples and Comparative Examples were evaluated as follows.

[0082]

[0083] For the thermoplastic resins obtained in the following synthesis examples, the hydrogenation rate was determined from the decrease rate of the absorption at 260 nm in the UV spectrometry before and after the hydrogenation reaction. From the absorbance A1 of the resin concentration C1 before the hydrogenation reaction, and the absorbance A2 of the resin concentration C2 after the hydrogenation reaction, it was calculated by the following formula.

[0084] Hydrogenation rate = 100×[1-(A2×C1) / (A1×C2)]

[0085]

[0086] For the thermoplastic resins obtained in the following synthesis examples, the dielectric polarization differences of the bonding units of the ...

Synthetic example 1

[0106] Synthesis Example 1 [Manufacture of Vinyl Copolymer Resin (B1)]

[0107] 77.0 mol% of purified methyl methacrylate (manufactured by Mitsubishi Gas Chemical Co., Ltd.), 23.0 mol% of purified styrene (manufactured by Wako Pure Chemical Industries, Ltd.), and 2-ethyl peroxide as a polymerization initiator tert-Amyl hexanoate (manufactured by Arkema Jifu Co., Ltd., trade name: LUPEROX 575) 0.002 mol% of the monomer composition was continuously supplied to a 10L complete mixing tank with a screw blade at 1 kg / h, with an average residence time of 2.5 Continuous polymerization was carried out at a polymerization temperature of 150°C. It was discharged continuously from the bottom so that the liquid level of the polymerization tank was constant, and introduced into a solvent removal device to obtain a pellet-like vinyl copolymer resin (B1').

[0108] The obtained vinyl copolymer resin (B1') was dissolved in methyl isobutyrate (manufactured by Kanto Chemical Co., Ltd.) to prepa...

Synthetic example 2

[0109] Synthesis Example 2 [Manufacture of Vinyl Copolymer Resin (B2)]

[0110] The usage-amount of methyl methacrylate used in Synthesis Example 1 was set to 62.0 mol%, and the usage-amount of styrene was set to 38.0 mol%, except that, it was carried out in the same manner as in Synthesis Example 1 to obtain a vinyl copolymer resin (B2). use 1 As a result of H-NMR measurement, the ratio of the methyl methacrylate structural unit was 60 mol%, and as a result of absorbance measurement at a wavelength of 260 nm, the hydrogenation reaction rate of the benzene ring site was 99%. The obtained vinyl copolymer resin (B2) had a glass transition temperature of 120°C and a saturated water absorption of 0.6 wt%. In addition, the intrinsic birefringence of the obtained vinyl copolymer resin (B2) was +0.0021.

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
thicknessaaaaaaaaaa
photoelasticityaaaaaaaaaa
Login to View More

Abstract

This invention can provide a stretched multilayer thermoplastic resin film comprising a layer including a thermoplastic resin (B) on at least one surface of a layer including a thermoplastic resin (A), the stretched multilayer thermoplastic resin film being characterized in that: the intrinsic birefringence of each of the thermoplastic resin (A) and the thermoplastic resin (B) is within a range from -0.005 to 0.005; the glass transition temperature of the thermoplastic resin (B) is 110 DEG C or higher; and the saturated water absorption rate of the thermoplastic resin (B) is less than 1.1 wt%.

Description

technical field [0001] The present invention relates to a thermoplastic resin laminated stretched film suitable for optical applications such as polarizer protective films. Background technique [0002] A liquid crystal display device uses a polarizer to convert transmitted light into linearly polarized light. In general, a polarizing plate is composed of three layers in which a polarizer protective film is bonded to both sides of a polarizer. [0003] As polarizers, uniaxially oriented films obtained by adsorbing and dispersing iodine or dyes on polyvinyl alcohol (hereinafter referred to as "PVA") are generally used, but such PVA-based polarizers have low mechanical properties and are easily damaged by heat or moisture. And shrinkage, or the polarizing function is easy to reduce, so the polarizer protective film is bonded on both sides to make a laminated body and used. The polarizer protective film requires no birefringence, high light transmittance, excellent moisture r...

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): B32B27/00B29C55/12B32B27/30G02B5/30B29L9/00B29L11/00
CPCB32B27/00B32B27/30B29C55/12G02B5/30B32B27/08B32B27/302B29C55/30B32B2250/03B32B2250/242B32B2270/00B32B2307/42B32B2307/726B32B2457/20B32B2553/00B32B2571/00B32B27/308B32B2307/518B32B27/20G02B5/305B32B2038/0028B32B2307/418B32B2398/20B32B7/027B32B2457/202B32B7/023G02F1/13363C09K2323/035C09K2323/03B32B27/32B32B2551/00C08J5/18C08J2333/08C08J2333/10
Inventor 田桑谦小池信行
Owner MITSUBISHI GAS CHEM CO INC
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