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Plastic product surface spraying method

A plastic product and surface spraying technology, which is applied to the surface coating liquid device, pretreatment surface, coating, etc., can solve the problems of affecting the corrosion resistance of plastic products, poor spraying effect, low bonding strength, etc., to achieve The preparation method is simple and easy, the requirements for preparation conditions are not harsh, and the effect of enhancing surface properties

Inactive Publication Date: 2018-07-06
HEFEI SHUSHI IND & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the prior art, the spraying effect used on plastic products is not good, and the surface of plastic products will have defects such as sand holes and scratches that are difficult to cover, thus causing a higher defective rate. As a result, the corrosion resistance of plastic products in use is affected, and there is also the disadvantage of insufficient bonding between the sprayed material and the plastic product, because the bonding force between the plastic and its surface coating is very weak, and it is not compatible with the coating. The bonding strength between the layers is low, and the coating is easy to peel off. The purpose is to provide a surface spraying method for plastic products, by coating an epoxy resin layer between the plastic product and the spray coating, so as to pass through the oxygen resin molecules. The force makes the coating firmly adhere to the plastic product, improves the bonding strength between the two, the process is simple, the operation is convenient, and it can cover the surface defects of the molded part; and the electrostatic performance of the plastic product Improved to reduce dust adsorption; at the same time enhance the hardness and scratch resistance of plastics; improve the corrosion resistance of plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for spraying the surface of a plastic product, comprising the following steps: 1) first heating the plastic product to 80° C. for annealing treatment for 2 hours; 2) cleaning with gasoline or alcohol to scrub the surface of the annealed plastic product for degreasing treatment, Drying; 3) Soak the plastic products after degreasing treatment in a sodium hydroxide solution with a concentration of 50g / L for 10 minutes, then rinse the surface with pure water, and dry at room temperature; 4) Use a plasma fan to face the plastic products Blow air on the surface of the surface, and the duration is 15min, and carry out static removal and dust removal treatment; 5) Spray the epoxy resin curing liquid containing alcohol to the plastic product surface after step 4) treatment, dry, and then coat epoxy resin Mixture with curing agent to form a 0.1mm coating layer, in which the mass ratio of epoxy resin to curing agent is 2:1; 6) Use a spray gun to spray the surface of the co...

Embodiment 2

[0020] A method for spraying the surface of a plastic product, comprising the following steps: 1) first heating the plastic product to 70° C. for annealing treatment for 3 hours; 2) cleaning with gasoline or alcohol to scrub the surface of the annealed plastic product for degreasing treatment, Drying; 3) Soak the plastic products after the degreasing treatment in a sodium hydroxide solution with a concentration of 30g / L for 20 minutes, then rinse the surface with pure water, and dry at room temperature; 4) Use a plasma fan to face the plastic products Blow air on the surface of the surface, and the duration is 10min, and carry out static removal and dust removal treatment; 5) spray epoxy resin curing liquid containing alcohol to the plastic product surface after step 4) treatment, dry, and then coat epoxy resin Mixture with curing agent to form a 0.2mm coating layer, wherein the mass ratio of epoxy resin to curing agent is 2.5:1; 6) Use a spray gun to spray the surface of the c...

Embodiment 3

[0022] A method for spraying the surface of a plastic product, comprising the following steps: 1) first heating the plastic product to 80° C. for annealing treatment for 2 hours; 2) cleaning with gasoline or alcohol to scrub the surface of the annealed plastic product for degreasing treatment, Drying; 3) Soak the plastic products after degreasing treatment in a sodium hydroxide solution with a concentration of 40g / L for 13 minutes, then rinse the surface with pure water, and dry at room temperature; 4) Use a plasma fan to face the plastic products Blow air on the surface of the surface, and the duration is 13min, and carry out static removal and dust removal treatment; 5) spray epoxy resin curing liquid containing alcohol to the plastic product surface after step 4) treatment, dry, and then coat epoxy resin Mixture with curing agent to form a 0.15mm coating layer, wherein the mass ratio of epoxy resin to curing agent is 2:1; 6) Use a spray gun to spray the surface of the coatin...

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Abstract

The invention discloses a plastic product surface spraying method. The method includes steps: subjecting plastic products to heating and annealing; performing deoiling treatment; soaking in sodium hydroxide solution, flushing and airing; adopting a plasma fan for destaticizing and dedusting treatment; spraying alcohol-containing epoxy resin curing liquid to dedusted surfaces, airing, and coating with an epoxy resin and curing agent mixture; adopting a spray gun for primary spray coating, and standing; adopting the spray gun for secondary spray coating, and standing; drying. The plastic productsurface spraying method has advantages that by intermolecular force of epoxy resin between the plastic products and coatings, the coatings can be firmly adhered to the plastic products to improve bonding strength between the coatings and the plastic products, and surface defects of formed products can be concealed; in addition, electrostatic performances of the plastic products can be improved, dust adsorption is reduced, and plastic corrosion resistance is improved.

Description

technical field [0001] The invention relates to a spraying method, in particular to a surface spraying method of plastic products. Background technique [0002] Plastic products are a general term for daily necessities and industrial products processed with plastic as the main raw material. During the processing of plastic products, spraying the surface is an indispensable step. The spraying effect used is not good, and the surface of the plastic product will have sand holes, scratches and other defects that are difficult to cover up, resulting in a high defect rate, thereby affecting the corrosion resistance of the plastic product in use, and there are also spraying problems. The shortcoming of insufficient bonding force between the material and the plastic product is because the bonding force between the plastic and its surface covering coating is very weak, the bonding strength with the coating is low, and the coating is easy to peel off, which affects the use effect. Se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/02B05D3/02B05D3/10B05D3/14B05D7/00
CPCB05D7/02B05D3/0218B05D3/101B05D3/142B05D7/544B05D2504/00B05D2420/01
Inventor 郭伟黄浩郭元汪鹏许飞章波
Owner HEFEI SHUSHI IND & TRADE CO LTD
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