Carbon fiber prepreg product and coating method thereof
A technology of carbon fiber prepreg and coating method, which is applied in the field of fiber products, can solve the problems of long solvent-based coating cycle, harsh working environment for workers, and great fire safety hazards, and achieve various decorative effects, good hardness, and zero VOCs Effect
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[0068] As a preferred embodiment of the present invention, the raw materials of the ultra-low temperature powder coating include: polyester resin, epoxy resin and auxiliary agents, and the auxiliary agents include one or more of catalysts, anti-sticking agents and defoamers .
[0069] Wherein, the main material of the ultra-low temperature powder coating is the main polyester resin containing carboxyl groups, the glass transition temperature is 40-60°C, the acid value is 10-75, and the curing temperature is 110-120°C. Then use low-temperature curing (80-90°C) liquid or low-viscosity solid epoxy resin, and use high-efficiency catalysts to perform low-temperature ring-opening reaction on epoxy resin, add a new type of defoamer for degassing and defoaming, and add a new type of anti-foaming agent. Adhesive, to better solve the problem of adhesion and agglomeration.
[0070] The catalyst can specifically be selected from 2-methylimidazole, 2-phenylimidazoline, tertiary amine and ...
Embodiment 1
[0100] (1) Select a carbon fiber prepreg product and perform dust removal and cleaning treatment. The carbon fiber prepreg product is a cured carbon fiber prepreg product.
[0101] (2) Grinding the carbon fiber prepreg product after dust removal and cleaning.
[0102] (3) Perform preheating treatment on the surface of the carbon fiber prepreg product after the grinding treatment, the preheating temperature is 70° C., and the preheating time is 5 minutes.
[0103] (4) Carry out one or more powder coatings on the surface of the preheated carbon fiber prepreg product, each coating thickness is 5 μm to form a powder coating, wherein, the powder coating adopts commercially available ultra-low temperature Powder coating, the ultra-low temperature powder coating has a spraying particle size of 5-25 μm, a D90 of less than 25 μm, a glass transition temperature of 40°C, a gelling time of 50s at 110°C, a curing temperature of 90°C, and a curing time of 3 minutes.
[0104] (5) Infrared c...
Embodiment 2
[0108] (1) Select a carbon fiber prepreg product and perform dust removal and cleaning treatment. The carbon fiber prepreg product is a cured carbon fiber prepreg product.
[0109] (2) Carrying out sticker treatment on the carbon fiber prepreg product after dust removal and cleaning treatment.
[0110] (3) Preheating the surface of the carbon fiber prepreg product after the sticker treatment, the preheating temperature is 80° C., and the preheating time is 10 minutes.
[0111] (4) Carry out one or more powder coatings on the surface of the preheated carbon fiber prepreg product, each coating thickness is 8 μm, to form a powder coating, wherein, the powder coating adopts commercially available ultra-low temperature Powder coating, the ultra-low temperature powder coating has a spraying particle size of 5-25 μm, a D90 of less than 25 μm, a glass transition temperature of 50°C, a gelling time of 60s at 110°C, a curing temperature of 100°C, and a curing time of 4 minutes.
[0112...
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