High-speed spraying aluminum profile fluorocarbon powder formula and spraying method

An aluminum profile, high-speed technology, applied in powder coatings, coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor adhesion, increased wastewater discharge, and poor performance, and achieve low cost and reduced construction costs.

Active Publication Date: 2017-06-20
GUANGDONG XINGFA ALUMINUM HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in medium and large aluminum processing enterprises, powder coatings are basically used for conventional coatings such as polyester; however, as fluorocarbon coatings with high weather resistance, powder coatings are rarely used. The carbon powder manufacturing technology is immature, and the adhesion is poor. On the other hand, the fluorocarbon powder spraying method and process are immature, and the sprayed products have many defects and poor performance.
For a long time, in the factory production, the products that need fluorocarbon coating still use the liquid spraying method, and when the liquid spraying, the solvent volatilization will cause environmental pollution, and the falling waste cannot be recycled, resulting in

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  • High-speed spraying aluminum profile fluorocarbon powder formula and spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, first make 10kg of fluorocarbon powder as a base powder, and its composition quality is 90g of PVDF fluorocarbon resin, 3300g of acrylic acid, 400g of polyisocyanate, 6000g of polyester resin, 60g of benzoin, and 150g of leveling agent. Mix them evenly and extrude Manufactured into fine powder. The aluminum profile to be sprayed is pretreated by passivation process. The pretreatment process is: degreasing with sulfuric acid, the concentration of the bath solution is 150g / L, and the treatment time is 8 minutes; washing with water for 2 minutes; alkaline etching, the concentration of the bath solution is 15g / L, Treatment time is 6 minutes; water washing for 2 minutes; neutralization, bath concentration 150g / L, treatment time 8 minutes; water washing 2 minutes; acid degreasing, acidity 6, treatment time 4 minutes; pure water washing, pure water conductivity 60μs / cm , treatment time 2 minutes; passivation, cell index 6.2, PH value 1.6, treatment time 5 minu...

Embodiment 2

[0035] The bottom powder used in this embodiment is the same as that in Example 1, the flour 2 used is made up of 30% recycled powder and 70% new powder, the forward speed of the aluminum profile is 4.5m / min, the pretreatment process and spraying process are the same as in Example 1, After spraying, the average thickness of the total coating on the surface of the profile is 45µm, and the appearance quality and performance of the profile are good.

Embodiment 3

[0037]In this example, first make 10kg of fluorocarbon powder as a base powder, and its composition quality is 100g of PVDF fluorocarbon resin, 4500g of acrylic acid, 400g of polyisocyanate, 4800g of polyester resin, 50g of benzoin, and 150g of leveling agent. After mixing evenly, extrude Manufactured into fine powder. Use passivation process to pre-treat the aluminum profiles to be sprayed. The pre-treatment process is: degreasing with sulfuric acid, the concentration of the bath solution is 220g / L, and the treatment time is 2 minutes; washing with water for 4 minutes; alkali etching, the concentration of the bath solution is 25g / L, Treatment time is 2 minutes; water washing for 8 minutes; neutralization, bath index 220g / L, treatment time 3 minutes; water washing 6 minutes; acid degreasing, acidity 12, treatment time 2 minutes; pure water washing, pure water conductivity 80μs / cm , treatment time 2 minutes; passivation, tank index 15, PH value 2.2, treatment time 2 minutes; pu...

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Abstract

The invention discloses a high-speed spraying aluminum profile fluorocarbon powder formula and a spraying method. The powder formula comprises, by mass, 0.1-1% of PVDF fluorocarbon resin, 33-45 % of acrylic acid, 4-5% of polyisocyanate, 48-60% of polyester resin, 0.5-0.7% of benzoin, 1.5-2% of leveling agent. Powders made by the formula are used as body powders during spraying; a two-step spraying method is used in the spraying process; and in a same powder room, firstly, the body powders are sprayed, then, face powders are sprayed, reclaimed powders after spraying can be reused, the reclaimed powders can be used as the face powders, and the mass percentage of the reclaimed powders in the face powders is 0-30%. According to the aluminum profile produced by the fluorocarbon powder formula and the spraying technology, the problems that the fluorocarbon powders coating leveling is poor, the adhesion is poor and the like are solved. The coating thickness can be lowered to 30 [mu]m, the coating has an attractive appearance and a good performance; a horizontal spray production line is used; the forward speed of the profile can reach 6 m/min; and the high-speed spraying aluminum profile fluorocarbon powder formula and the spraying technology is high in efficiency, low in cost and high in performance.

Description

technical field [0001] The invention relates to an aluminum profile spray coating powder formula and a spraying process, in particular to an aluminum profile spray coating fluorocarbon powder formula and a spraying process. Background technique [0002] Powder coating has the advantages of high efficiency, environmental protection, and powder recyclability, and is an ideal method to replace liquid spraying. At present, in medium and large aluminum processing enterprises, powder coatings are basically used for conventional coatings such as polyester; however, as fluorocarbon coatings with high weather resistance, powder coatings are rarely used. The carbon powder manufacturing technology is immature, and the adhesion is poor. On the other hand, the fluorocarbon powder spraying method and process are immature, and the sprayed products have many defects and poor performance. For a long time, in the factory production, the products that need fluorocarbon coating still use the l...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D3/02B05D3/10C09D175/14C09D127/12C09D5/03
CPCB05D3/0254B05D3/102B05D7/14C09D5/03C09D127/12C09D175/14
Inventor 李健安吴宗闯吴锡坤谭日纯
Owner GUANGDONG XINGFA ALUMINUM HENAN
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