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Films for organic el applications, as well as organic el displays and organic el lighting

An organic and display technology, applied in applications, household appliances, other household appliances, etc., can solve the problems of insufficient rigidity, deterioration of flatness, curling, etc., and achieve the effect of excellent processing suitability

Active Publication Date: 2021-07-23
TORAY ADVANCED MATERIALS RES LAB CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although thinning can be achieved, there will be a problem of insufficient rigidity
Therefore, although the film used to support the organic EL luminous body is used, there are serious problems in the current product as follows: in lamination and post-processing, the coefficient of thermal expansion and thermal shrinkage are relatively large, the thermal dimensional stability is poor, and it is easy to Deterioration of flatness and curling, etc.

Method used

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  • Films for organic el applications, as well as organic el displays and organic el lighting
  • Films for organic el applications, as well as organic el displays and organic el lighting
  • Films for organic el applications, as well as organic el displays and organic el lighting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] Using terephthalic acid as the acid component and ethylene glycol as the diol component, antimony trioxide (polymerization catalyst) was added to the obtained polyester pellets at 300 ppm in terms of antimony atoms, and polycondensation reaction was carried out to obtain A polyethylene terephthalate pellet having an intrinsic viscosity of 0.63 dl / g and a carboxyl terminal group weight of 40 equivalents / ton was obtained.

[0145] First, the polyester was vacuum-dried at 150°C for 2 hours, then vacuum-dried at 180°C for 2 hours, supplied to an extruder and melted at 285°C, filtered through a 3 μm cut-off filter, and then filtered by a T-shaped spray The nozzle is extruded in the form of a sheet, and is wrapped on a mirror casting drum with a surface temperature of 25°C by electrostatic casting method to cool and solidify. This unstretched film was heated to 95° C. and stretched 2.1 times in the longitudinal direction to form a uniaxially stretched film. Both surfaces of ...

Embodiment 2～ Embodiment 18

[0158] A PET film was obtained in the same manner as in Example 1 except that the production conditions of the PET film were as described in the table. Next, an adhesive layer film and an organic EL light-emitting film were obtained by the same method as in Example 1 using the obtained PET film.

[0159] The evaluation characteristics in the process of obtaining the organic EL film and the evaluation characteristics of the organic EL light-emitting film are shown in the table.

Embodiment 19

[0161] Prepare pyromellitic dianhydride (molecular weight 218.12) / 3,3',4,4'-biphenyltetracarboxylic dianhydride (molecular weight 294.22) / 4,4' in molar ratio 94 / 6 / 87 / 13 -diaminodiphenyl ether (molecular weight 200.24) / p-phenylenediamine (molecular weight 108.14), polymerized as a 19% by weight solution in DMAC (N,N-dimethylacetamide) to obtain 3500 poise at 25°C Polyamic acid solution. After adding β-picoline and acetic anhydride to the polyamic acid solution so that the molar ratio relative to the polyamic acid becomes 4.5, the ratio of the support body speed / discharge nozzle discharge speed is 5.0, and the support The rotation speed of the body is set to 15m / min, and the wave pressure on the side of the rotation direction of the support body is set to 400Pa higher than the wave pressure on the opposite side. Cast on the support body to obtain a self-supporting polyimide gel membrane.

[0162] The gel film was peeled off continuously from the support, stretched 1.2 times in...

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Abstract

The present invention provides a film that solves this problem and is excellent in bonding suitability and processing suitability when used as an organic EL display or organic EL lighting. A film arranged on the non-light-emitting side of organic EL displays and lighting, the thickness of the film is not less than 5 μm and not more than 300 μm, and the thermal shrinkage rate in the MD direction of the film longitudinal direction when it is heat-treated at 150°C for 30 minutes Hm and thermal shrinkage rate Ht in the width direction satisfy the following formulas [1] and [2]: [1] 0≤|Hm|≤0.7; [2] 0≤|Ht|≤0.7.

Description

technical field [0001] The invention relates to an organic EL display and a film for organic EL lighting. Background technique [0002] With the advancement of electrical and electronic equipment brought about by the development of electronic technology in recent years, the performance, multi-function, miniaturization, and weight reduction of electrical and electronic equipment, the materials of these equipment are also being converted from metal materials and glass materials to plastic materials. Even among plastic materials, a shift to light-weight and flexible plastic films is remarkably ongoing. [0003] In recent years, thin displays using liquid crystals, organic electroluminescence (organic EL), field emission, and electrophoresis, etc., are increasingly attracting attention. Among them, a display in which the display itself can be bent is called a flexible display. Among flexible displays, organic EL displays, which are currently receiving the most attention, are e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/06B32B27/08B32B27/28B32B27/36B32B37/12B32B37/26B32B38/00B32B38/18H01L51/50
CPCB32B27/08B32B27/281B32B27/36B32B37/1284B32B37/26B32B38/0008B32B38/0012B32B38/0036B32B38/1883B32B2457/00B32B2457/20B32B2264/10B32B2307/7246B32B2307/7242B32B2307/30B32B2307/21B32B2255/10B32B2255/26B32B2038/0028B32B2037/268H10K77/111Y02E10/549
Inventor 贯井启介长田俊一张磊
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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