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Plastic anti-cracking coating process for domestic appliance

A technology for household appliances and coating technology, applied in the field of plastic anti-cracking coating technology for household appliances, can solve problems such as material cracking, and achieve good decorative effects, good mechanical properties, physical and chemical properties, and good appearance.

Inactive Publication Date: 2013-03-20
GUANGZHOU QINGTIAN INDAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional home appliance coatings are mainly solvent-based coatings. Plastics (PC, PMMA, ABS+PMMA) generally have the phenomenon of organic solvents eroding materials during coating, and cracking of materials will occur in severe cases.

Method used

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  • Plastic anti-cracking coating process for domestic appliance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pearlescent water-based plastic coatings: alkali swelling thickener 1%, water-based acrylic emulsion 60%, additives 9%, KC110 pearlescent powder 6%, deionized water 24%.

[0032] White water-based plastic coating: alkali swelling thickener 1%, water-based acrylic emulsion 50%, auxiliary 9%, R980 titanium dioxide 25%, deionized water 15%.

[0033] Polish the defects of plastic PC with 1000 sandpaper, clean with 6# solvent oil, blow dust with high-pressure air flow, spray pearlescent water-based plastic paint on the bottom of the plastic back, level at room temperature, bake at 60℃ for 10min, the appearance and performance of the coating film For inspection, the back surface of the plastic is sprayed with white water-based plastic coating, leveled at room temperature, and baked at 55°C for 10 minutes to inspect the appearance and performance of the coating film. Silk screen, bake at 55°C for 2 minutes in a screen printing oven, inspect the appearance of the screen at room tempe...

Embodiment 2

[0035] Silver-white water-based plastic coating: alkali swelling thickener 1%, water-based acrylic emulsion 50%, additives 19%, water-based aluminum powder 5%, deionized water 25%.

[0036] For plastic PMMA defects, use 1000 sandpaper to polish, clean with 6# solvent oil, blow dust with high-pressure air flow, spray a single layer of silver-white water-based plastic coating on the back of the plastic, level at room temperature, and bake at 45°C for 15 minutes. Perform performance inspection, silk-screen, bake at 55℃ for 2 minutes in a silk-screen oven, inspect the appearance of the silk-screen, leave it at room temperature for more than 2 hours, and inspect and pack the appearance of the silk-screen.

Embodiment 3

[0038] White water-based plastic coating: alkali swelling thickener 1%, water-based acrylic emulsion 50%, auxiliary 9%, R980 titanium dioxide 25%, deionized water 15%.

[0039] For plastic ABS+PMMA defects, use 1000 sandpaper to polish, clean with 6# solvent oil, blow dust with high-pressure airflow, spray single-layer white water-based plastic coating on the front of the plastic, level at room temperature, bake at 55°C for 10 minutes, and check the appearance of the coating And performance test, silk screen, bake at 55 ℃ for 2 min in silk screen oven, test the appearance of silk screen, put it at room temperature for more than 2 hours, and inspect and package the appearance of silk screen.

[0040]

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Abstract

The invention discloses a plastic anti-cracking coating process for a domestic appliance. The plastic anti-cracking coating process for the domestic appliance is characterized in that water-based plastic coating of various colors replaces solvent type plastic coating to be used for plastic coating of the domestic appliance, the water-based plastic coating is enabled to be correctly used for the plastic coating of the domestic appliance, not only is the quality problem of cracking occurring in poly carbonate (PC), polymethyl methacrylate (PMMA), acrylonitrile butadiene styrene (ABS)+PMMA and other plastic coating solved, but also the needs of decorative appearance of plastic of the domestic appliance are met.

Description

technical field [0001] The invention relates to an anti-cracking coating process for plastics of household appliances. Background technique [0002] Coating of household appliances is an important part of the manufacturing process of household appliances. It can enhance the durability of plastic materials and provide decorative effects, so it has attracted the attention and attention of the industry. PC plastic has a tendency to stress cracking due to its poor self-lubricating properties. It is also often due to the increase in residual stress and cracking tendency during injection molding. The elongation at break of PMMA is only 2%-3%, so the mechanical performance characteristics are basically hard and brittle plastics, and it is notch sensitive, and it is easy to crack when the stress increases; when the solvent-based coating is applied, due to the organic solvent The eroded material increases its internal stress, which causes cracking. ABS+PMMA plastics show some chara...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D7/02B05D7/24B05D3/00B05D3/02C09D133/00C09D7/12
Inventor 李达信许振阳张红严博
Owner GUANGZHOU QINGTIAN INDAL
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