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Multi-layer base material and image display device

A technology of base material and base film, which is applied in coatings, instruments, electrical digital data processing, etc. It can solve the problems of lower sensitivity of touch panel sensors, lower appearance of touch panel, difficult operation, etc., and achieve sufficient surface protection Excellent performance and flexibility, the effect of thinning does not impair

Active Publication Date: 2016-02-03
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the functional layer is formed on a thin base film, the problem that the film is easily bent due to stress etc.
A film that is warped (that is, has low flatness) not only makes handling in the manufacturing process difficult, but is also used in image display devices equipped with touch panels (hereinafter also referred to as "touch panel image display devices"). When there is a gap or a joint for protecting the sensor, the thickness of the gap or the joint will be uneven, so the appearance of the touch panel will be reduced due to Newton rings and the like being seen under the interference of light. question
In addition, it is also predicted that the sensor sensitivity of the touch panel will decrease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0188] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to these examples. In addition, unless otherwise specified, "part" and "%" are based on mass.

Synthetic example 1

[0189] (Synthesis example 1) Synthesis of homopolymer of 3,4-epoxycyclohexylmethyl methacrylate

[0190] Add 48 parts of 3,4-epoxycyclohexylmethyl methacrylate, 50 parts of methyl isobutyl ketone (MIBK), azobisisobutyl 0.48 parts of nitrile (AIBN) and 0.49 parts of dodecylmercaptan were heated to 85° C. while stirring under a nitrogen atmosphere, and reacted for 3 hours. The obtained polymer solution had a solid content of 50%, and when analyzed by GPC, the weight average molecular weight (in terms of polystyrene) of the polymer was 15,000.

Synthetic example 2

[0191] (Synthesis Example 2) Synthesis of 3,4-epoxycyclohexylmethyl methacrylate / methyl methacrylate / n-butyl methacrylate copolymer

[0192]Add 43.2 parts of 3,4-epoxycyclohexylmethyl methacrylate, 2.4 parts of methyl methacrylate, 2.4 parts of n-butyl methacrylate, 50 parts of MIBK, 0.48 parts of AIBN, and 0.25 parts of dodecylmercaptan were heated to 85°C while stirring under a nitrogen atmosphere, and reacted for 3 hours. The obtained polymer solution had a solid content of 50%, and when analyzed by GPC, the weight average molecular weight (in terms of polystyrene) of the polymer was 26,000.

[0193] (Evaluation method)

[0194] (1) Determination of the thickness of the protective layer

[0195] Regarding the thickness of the protective layer in the multilayer substrates obtained in Examples and Comparative Examples, the thicknesses at 20 positions were measured from images of cross-sections taken with a transmission electron microscope (TEM), and the average of the value...

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PUM

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Abstract

The invention provides a multi-layer base material and an image display device with the multi-layer base material. The multi-layer base material is provided with a protective layer on at least one surface of a base material film; the thickness of the base material film is less than 40mum; the protective layer is a condensate for an ionized radioactive ray solidified resin composition containing positive ion polymerize resin and free radical polymerize resin. For the multi-layer base material, even if the thickness is reduced, occurrence of bending is less; the yellowing caused by initial coloring and long-term of storage in the hot and humid situation is less too; the flexibility is excellent; and the surface protection performance is high.

Description

technical field [0001] The present invention relates to a multilayer substrate and an image display device provided with the multilayer substrate. In particular, it relates to a multilayer base material suitable for use in a space or a junction of an image display device including a touch panel, and a touch panel image display device including the multilayer base material. Background technique [0002] In recent years, mobile information terminal devices such as tablet PCs and smartphones equipped with two-way communication functions and equipped with transparent touch panels for displaying and inputting information have become widespread not only in Japan but also in the world . [0003] From the viewpoint of miniaturization and weight reduction of mobile information terminal devices, thickness reduction is also required for touch panels and image display elements mounted in the devices. As a method of reducing the thickness of a touch panel or an image display element, a...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D4/02C09D4/06C09D175/14C09D133/04C09D133/14G06F3/041
Inventor 堀尾智之清原欣子中村启志金子雅一鸟阪晶子田边健治
Owner DAI NIPPON PRINTING CO LTD