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Laminate

A laminated body and adhesive layer technology, applied to layered products, electrical solid devices, semiconductor devices, etc., can solve problems such as reduced contrast and increased reflection of external light

Active Publication Date: 2021-10-15
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the use of such a metal electrode increases the reflection of external light, resulting in a poor contrast ratio.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0161] [Manufacturing of laminated body]

[0162] The transfer type optical function film 1 and the transfer type optical function film 2 utilize an ultraviolet curing type adhesive to fit the respective optical functional layers (the surface opposite to the substrate film) into the bonding surface. . The ultraviolet curable adhesive is solidified by irradiation. In this way, a laminate 1 comprising two layers of optical functional layer including transfer type optical function film 1 and transfer type optical function film 2 is produced.

[0163] [Peeled evaluation]

[0164] A test piece having a width of about 1000 mm × 500 mm is cut from the laminate obtained in the examples.

[0165] The end of the substrate film of one of the substrate films described below, at a temperature of 23 ° C, and the relative humidity is 5 m / min, which is peeled off in the atmosphere of 60 ° C, with a relative humidity of 60%.

[0166] · There will be no unpopular separation, the sample of the zip...

Embodiment 2

[0169] In addition to using the transfer type optical function film 3 and the transfer type optical functional film 2, a laminate 2 is obtained in the same manner as in Example 1.

Embodiment 3

[0171] In addition to using the transfer type optical function film 5 and the transfer type optical function film 6, a laminate 3 is obtained in the same manner as in Example 1.

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Abstract

[Problem] To provide a laminate in which a plurality of positions are present where a substrate film and an optical functional layer are laminated, and a desired substrate film can preferentially peeled off from the optical functional layer. [Solution] This laminate 10 is provided with, in the following order: a first substrate film 1A; a first optical functional layer 2A including a layer obtained by curing a first polymerizable liquid crystal compound; a second optical functional layer 2B including a layer obtained by curing a second polymerizable liquid crystal compound; and a second substrate film 1B. In-plane peeling force P1 between the first substrate film 1A and the first optical functional layer 2A and in-plane peeling force P2 between the second substrate film 1B and the second optical functional layer 2B satisfy the following expression (1), and the thickness T1 of the first substrate film 1A and the thickness T2 of the second substrate film 1B satisfy the following expression (2). (1): 0.67<P1 / P2<1.50 (2): 1.05<=T1 / T2.

Description

Technical field [0001] The present invention relates to a laminate. Background technique [0002] The organic EL display device in order to efficiently utilize the light emitting layer with excellent reflective metal electrode. On the other hand, the use of such metal electrode reflects external light is increased, resulting in reduced contrast in poor condition. Accordingly, in order to impart an antireflection function, the organic EL display device includes a display element visible side circularly polarizing plate in the organic EL. [0003] Circularly polarizing plate and retardation film are laminated polarizing plate. Circularly polarizing plate is required to convert the same manner as in the wide wavelength range for circularly polarized light, or may not function as seen obliquely from colored in reflected light. In order to exhibit this function, the retardation film may have a plurality of retardation layers. Specifically, the retardation film may be λ / 2 plate lamin...

Claims

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Application Information

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IPC IPC(8): G02B5/30H01L27/32B32B7/023G06F3/041H05B33/02H01L51/50
CPCG02B5/3083G02B5/3016G02B5/305G02B7/023H10K59/00H10K50/00
Inventor 住吉铃鹿神野彩乃
Owner SUMITOMO CHEM CO LTD
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