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Fluorine resin film

A fluororesin and blue pigment technology, applied in the field of fluororesin film, can solve the problems of reduced visible light transmittance, poor visible light transmittance, poor transparency, etc., and achieves excellent colorless transparency and heat ray blocking. Effect

Inactive Publication Date: 2016-06-29
TORAY ADVANCED FILM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the agricultural sheet of Patent Document 1 has the following problems: since it contains at least 3 parts by weight or more than 10 parts by weight of inorganic particles mainly composed of tin oxide with respect to 100 parts by weight of synthetic resin, it has a problem of being resistant to heat rays. Infrared blocking, but visible light transmittance is poor, it looks black, so there is a problem of poor perspective
This method also has the following problems: the coloring of the transmitted light by the near-infrared absorber cannot be avoided, and the visible light transmittance decreases.
With this method, since the transparent conductive film (ITO) is the outermost layer, there are problems of poor long-term outdoor weather resistance, and problems of poor bending resistance and friction resistance inherent in film lamination.
In addition, in the formation of a transparent conductive film (ITO) using a vacuum evaporation method, sputtering method, CVD method, etc., there is also a problem that the processing is complicated and the cost becomes high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] ETFE particles: 462.5kg, ITO masterbatch A1: 25kg and blue masterbatch B1: 12.5kg were uniformly mixed, supplied to a single screw extruder with a screw diameter of 65mm, filtered with a filter, and then at 330°C Extruded into a film with a T-die, and contacted with a cooling roll set at 175°C to cool and solidify and wind to obtain a thickness of 100μm with ITO content of 0.25% by weight and cobalt blue content of 0.050% by weight Of unstretched film.

[0098] The obtained film has no yellowish tint, is colorless and transparent, and the outdoor scenery passing through the film looks natural and has good perspective. The near-infrared transmittance of this film is low at 38.7%, and the heat ray blocking efficiency measured by a heat ray blocking evaluation tester is 34.5%. The UV transmittance is reduced to 26.5%, which is a film with UV blocking effect. Table 1 summarizes the film properties.

Embodiment 2

[0100] Using the same raw materials as those used in Example 1, ETFE particles: 485kg, ITO masterbatch A1: 10kg, and blue masterbatch B1: 5kg were uniformly mixed and supplied to a single screw extruder with a screw diameter of 65mm. The film forming device of the filter, T-die, and cooling cylinder was used to form a film by melt extrusion to obtain an unstretched film having a thickness of 250 μm with an ITO content of 0.10% by weight and a cobalt blue content of 0.020% by weight.

[0101] The obtained film has no yellowish tint, is colorless and transparent, and the outdoor scenery passing through the film looks almost natural in color, and has good perspective. The near-infrared transmittance of this film is low at 42.3%, and the heat ray blocking efficiency measured by a heat ray blocking evaluation tester is 36.1%. The UV transmittance is significantly reduced to 6.1%, which is a film with UV blocking effect. Table 1 summarizes the film properties. In addition, after the ...

Embodiment 3、4

[0102] [Examples 3 and 4, Comparative Examples 1 and 2]

[0103] Except for variously changing the compounding quantity of the ITO masterbatch, it carried out similarly to Example 2, and obtained the unstretched film with a thickness of 250 micrometers.

[0104] The film characteristics are summarized in Table 1. The more the ITO content in the film, the lower the average light transmittance at 1800-2200 nm, and the heat ray blocking efficiency increases inversely. If the ITO content is 0.003% by weight (Comparative Example 1), the near infrared transmittance is high, reaching 92.4%, and the heat ray blocking efficiency is insufficient, being 7.2%. If the ITO content is 0.30% by weight (Comparative Example 2), although it can be said that there is a heat ray blocking effect in this case, the haze is high, reaching 27.0%, and the transparency is insufficient.

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Abstract

The present invention provides a fluororesin film which has a heat ray blocking function without impairing the high transparency, mechanical properties, and weather resistance inherent in fluororesin, and which is colorless. Transparency through which natural colors can be seen. The present invention provides a fluororesin film that maintains the properties of fluororesin films such as mechanical properties, transparency, and long-term weather resistance, and is excellent in heat ray blocking properties, is colorless and transparent, and can transmit It sees natural color. A fluororesin film comprising an average particle diameter of indium tin oxide in the range of 10 to 200 nm and a blue pigment in the range of 10 to 200 nm in average particle diameter, characterized in that the indium tin oxide content A (weight %) and the blue pigment content B (% by weight) simultaneously satisfy the following formulas (1) and (2). 10 / t≤A≤60 / t (1), 0.05A≤B≤0.3A (2), in the above formula, t represents the film thickness (μm).

Description

Technical field [0001] The present invention relates to a fluororesin film excellent in heat ray blocking properties. More specifically, it relates to a fluororesin film that has excellent heat ray blocking properties, is colorless and transparent, and can see a natural color through it. Background technique [0002] Fluorine resin film is used in agricultural greenhouse coating materials, roofing membrane materials, window materials, solar cell surface protection materials, concentrating panel surface materials, and display panels due to its excellent weather resistance, transparency, mechanical properties, and moisture resistance. Surface materials, exterior decoration materials of building materials, etc. [0003] Especially in the field of building materials such as roof membrane materials and window materials, the demand has expanded due to the following advantages: due to environmental concerns, the introduction of sunlight eliminates the need for indoor lighting during the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/12C08J5/18C08K3/22
CPCC08K3/22C08K2003/2231C08K2201/003C08K5/0041C08K5/0091C08J2327/12C08K3/013C08J2323/08C08J2327/18C08J5/18C08L27/12
Inventor 今泉一行野口幸男木本敦
Owner TORAY ADVANCED FILM CO LTD
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