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Coating film

A technology of coating film and coating layer, which is applied in the field of coating film, can solve problems such as increased liquid replacement operations, poor adhesion of surface functional layers, and insufficient stability of coating liquid, etc., and achieves excellent sliding properties and tight adhesion Excellent performance and high industrial value

Active Publication Date: 2014-03-19
MITSUBISHI CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, since the metal chelate compound is unstable in the aqueous solution, the stability of the coating solution may be insufficient due to the combination, which may lead to an increase in liquid replacement work during long-term production (Patent Document 1)
In addition, generally used high-refractive index materials have poor adhesion to surface functional layers such as hard coats.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] The mixed raw material (particle content 250ppm) obtained by mixing polyester (A), (B) and (C) at a ratio of 90%, 5%, and 5% respectively is used as the raw material for the outermost layer (surface layer), and the The mixed raw materials obtained by mixing polyesters (A) and (B) at a ratio of 95% and 5% are used as raw materials for the intermediate layer, and are supplied to two extruders respectively, and after melting at 285°C, set at 40 On a cooling roll at ℃, co-extrude two types of three layers (surface layer / intermediate layer / surface layer = 1:31:1 discharge rate, surface layer thickness 3.8 μm design) and allow it to cool and solidify to obtain undrawn Stretch the sheet (film condition 1 of Table 1). Next, after stretching 3.4 times in the longitudinal direction at a film temperature of 85° C. by using the difference in roll speed, the coating liquid 3 shown in Table 2 below was applied to both sides of the longitudinally stretched film, introduced into a tent...

Embodiment 2～26

[0146] In Example 1, the amount of particles contained in the polyester film and the thickness of the surface layer were changed to the film conditions shown in Table 1, and the composition of the coating agent was changed to the composition of the coating agent shown in Table 2. It produced similarly to Example 1, and obtained the polyester film. As shown in Table 3, the obtained coating film had good slipperiness and transparency, and good interference spots and adhesion.

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Abstract

Provided is a coating film which can be used suitably for uses in which transparency and slip property are required, and in which good visibility and adherence with respect to a hard coat layer, etc. are required, for example, transparent electrode film members, etc. for touch panels, etc. This coating film comprises a coating layer formed from a coating solution which contains a metallic oxide and at least two types of crosslinking agents, on at least one side of a polyester film comprising particles with an average particle size of 3.0 [mu]m or less, wherein the absolute reflectance of the coating layer has one minimum value within a wavelength range of 400-800 nm, and the absolute reflectance at the minimum value is 4.0% or more.

Description

technical field [0001] The present invention relates to a coating film, for example, to a coating film suitable for applications such as film members for transparent electrodes such as touch panels, which require transparency, slipperiness, and reduction of interference spots due to reflection of external light. Background technique [0002] In recent years, polyester films have been used in various display members, and are also used as base materials for films for transparent electrodes such as touch panels. In these applications, the appearance is sometimes important, and the base film is required to have excellent transparency and visibility. In addition, in consideration of post-processing, a base film that is easy to handle and hard to scratch is required. [0003] In order to prevent curling, prevent scratches, and improve surface hardness, these films are often hard-coated as post-processing. In order to improve the adhesiveness between the polyester film which is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04B32B27/36B32B9/00C08J7/043C08J7/046G02B1/10G02B1/14
CPCC08J7/04C08J2367/02C08J7/047B32B27/36C08J7/0427C08J7/043C08J7/046C08K3/22C08L67/02
Inventor 川崎泰史尼子胜也加藤优佳舟津良亮藤田真人
Owner MITSUBISHI CHEM CORP
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