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coating film

A coating film and coating technology, applied in the field of coating film, can solve problems such as difficulty in use and poor visibility, and achieve the effect of excellent sliding properties and high industrial value

Active Publication Date: 2016-08-24
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If a film with interference spots is used for a display such as a touch panel, or a molding part that requires design, such as a housing of a mobile phone, the visibility will deteriorate and it will be difficult to use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0191] The mixed raw material obtained by mixing polyester (A) and (B) at a ratio of 97% and 3% respectively is used as the raw material of the outermost layer (surface layer), and polyester (A) is mixed at a ratio of 97% and 3% respectively. ), (B) as the raw material of the middle layer, respectively supplied to two extruders, and after melting at 285°C, two kinds of 3 layers (surface layer / middle layer / surface layer = 1:18:1 The discharge amount) of the layer constitution was co-extruded onto a cooling roll set at 40° C., cooled and solidified to obtain an unstretched film. Then, the water-based coating solution A1 shown in Table 1 below was applied to both surfaces of the unstretched film, and dried to obtain a film having a first coating layer having a film thickness (after drying) of 0.2 μm. Next, at a film temperature of 85° C., after stretching 3.4 times in the longitudinal direction by using a difference in the peripheral speed of the rolls, the water-based coatin...

Embodiment 2～19

[0193] In Example 1, except having changed the coating agent composition into the coating agent composition shown in Tables 1-3, it manufactured similarly to Example 1, and obtained the polyester film. As shown in Table 4, the transparency of the obtained polyester film was good, the roughness of the film after longitudinal stretching was also sufficient, and the interference spot level of the film after forming a hard-coat layer was also good.

Embodiment 20

[0195] The mixed raw materials obtained by mixing polyester (A), (B) and (C) at a ratio of 96%, 3%, and 1% are used as raw materials for the outermost layer (surface layer), and 97%, 3% The mixed raw materials obtained by mixing polyesters (A) and (B) in the ratio are used as the raw materials for the middle layer, and are supplied to two extruders respectively. Surface layer = 1:18:1 discharge rate) layer composition was co-extruded onto a cooling roll set at 40°C, allowed to cool and solidify, and an unstretched film was obtained. Then, the water-based coating solution A1 shown in Table 1 below was applied to both surfaces of the unstretched film, and dried to obtain a film having a first coating layer having a film thickness (after drying) of 0.2 μm. Next, at a film temperature of 85° C., after stretching 3.4 times in the longitudinal direction by using a difference in the peripheral speed of the rolls, the water-based coating solution B1 shown in Table 2 below was applied ...

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Abstract

The present invention provides a coating film having excellent transparency, good sliding properties, and good visibility after forming various surface functional layers such as a hard coat layer. The coating film has a first coating layer formed by stretching in at least one direction after coating a coating liquid containing particles on at least one surface of the unstretched polyester film, and on the first coating layer and / or The surface on the side opposite to the first coating layer is formed by applying a coating liquid, and the absolute reflectance has a minimum value in the wavelength range of 400 to 800 nm, and the absolute reflectance of the minimum value is 4.0%. above the second coating layer.

Description

technical field [0001] The present invention relates to a coating film, and particularly relates to a coating film suitable for applications requiring excellent transparency and reducing interference spots caused by reflection of external light when a surface functional layer such as a hard coat layer is formed. Background technique [0002] Polyester film has excellent transparency and strength, so it is used as a substrate for touch panels, prism lens films, microlens films, light diffusion films, antireflection films, hard coat films, electromagnetic wave shielding films, molding, etc. In recent years, films used for forming surface functional layers typified by hard coats have been demanded to be more transparent especially for parts for displays such as touch panels, in-mold transfer films, in-mold label films, etc. . [0003] Conventionally, the method of including particles in a polyester film for the purpose of slipperiness is generally used (Patent Documents 1 and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36C08J7/04C08J7/043C08J7/046
CPCC08J7/042C08J2367/02C08J2433/06C08J2467/02C08J2475/06C08J7/0427C08J7/043C08J7/046B32B27/08B32B27/18B32B27/36C08G73/0233B32B2367/00C08G2115/06C08J5/18
Inventor 川崎泰史舟津良亮尼子胜也加藤优佳藤田真人
Owner MITSUBISHI CHEM CORP
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