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Pre-coated aluminum material

A pre-coating, aluminum technology, used in coatings, lighting and heating equipment, chemical instruments and methods, etc., can solve the problems of reduced heat exchange efficiency, narrowed gaps between fins, increased airflow resistance, etc. Effects of excellent odor resistance, excellent press moldability, and excellent moisture resistance

Active Publication Date: 2021-01-22
FURUKAWA SKY ALUMINUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the amount of this dew condensation water increases, the gap between the fins will be narrowed or closed in some cases, which may increase the ventilation resistance, that is, the resistance when the airflow passes between the fins.
As a result, there may be a reduction in heat exchange efficiency

Method used

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  • Pre-coated aluminum material
  • Pre-coated aluminum material
  • Pre-coated aluminum material

Examples

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Embodiment 1～ Embodiment 9

[0091] Such as figure 1 As illustrated, the precoated aluminum material 1 of the embodiment has an aluminum plate 2 , a chemical conversion film 3 , and a hydrophilic film 4 . In the precoated aluminum material 1 , an aluminum plate 2 , a chemical conversion film 3 , and a hydrophilic film 4 are laminated in this order.

[0092] Specifically, chemical conversion film 3 is formed on the surface of aluminum plate 2 , and hydrophilic film 4 is formed on the surface of chemical conversion film 3 . The chemical conversion film 3 and the hydrophilic film 4 may be formed on one side of the aluminum plate 2 or may be formed on both sides.

[0093] The chemical conversion film 3 is a phosphoric acid chromate treatment film. The hydrophilic film 4 contains an acrylic resin (A), a polyalkylene ether resin (B), a resin (C) and polyvinyl alcohol (D) as essential components.

[0094] The acrylic resin (A) is a resin that does not have a repeating unit derived from a monomer having a sulf...

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Abstract

This pre-coated aluminum material (1) has an aluminum plate (2), a chemical coating (3), and a hydrophilic coating (4) laminated sequentially. The hydrophilic coating (4) contains at least an acrylicresin (A), a polyalkylene ether resin (B), a resin (C), and polyvinyl alcohol (D). The acrylic resin (A) is substantially free from repeating units derived from sulfo group-containing monomers and amide group-containing monomers. The resin (C) has a repeating unit derived from an amide group-containing monomer. The hydrophilic coating (4) has two peaks within the wavenumber range of 1600 to 1800 cm-1 in an infrared absorption spectrum. The absorbance ratio of the peaks satisfies a predetermined relationship.

Description

technical field [0001] The present invention relates to precoated aluminum materials having a hydrophilic film. Background technique [0002] Conventionally, as heat exchangers installed in air conditioners, refrigerators, etc., so-called plate-fin-tube heat exchangers having a large number of fins and tubes intersecting the fins have been commonly used. In a plate-fin-tube heat exchanger, for example, an indoor unit in cooling operation in an air conditioner may perform heat exchange between a low-temperature refrigerant and outside air. [0003] In this case, if the temperature of the fin is lower than the dew point of the outside air, dew condensation water will adhere to the surface of the fin. If the amount of this dew condensation water increases, the gap between the fins will narrow or may be closed in some cases, which may increase the ventilation resistance, that is, the resistance when the airflow passes between the fins. As a result, there is a possibility of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/08B32B15/082F28F1/32F28F13/18F28F19/02F28F21/08
CPCB32B15/08B32B15/082F28F1/32F28F13/18F28F21/08F28F19/02
Inventor 小泽武广八重樫起郭世古佳也笹崎干根坂田阳介梅田真纱子内川美和
Owner FURUKAWA SKY ALUMINUM CORP
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