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Electrostatic spraying method for medium-density fiberboard powder coatings

A technology of powder coating and electrostatic coating, which is applied in the direction of household components, flat products, household appliances, etc., can solve the problems of no practical application in industrial production, cracks, etc., and achieve good chemical resistance, simple process, and coating adhesion strong effect

Inactive Publication Date: 2018-05-01
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the prior art has the following problems: (1) there is no practical application in industrial production; (2) cracks appear in the edges during processing; (3) the product adopts polyester resin, and epoxy powder, isocyanuric acid Triglycidyl ester is used as curing agent to prepare high leveling polyester powder coating, it is difficult to form low leveling low temperature curing powder coating on medium density fiberboard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention discloses an electrostatic coating method of a medium density fiberboard powder coating. The steps of the method described in this embodiment are:

[0030] Step 1. Surface treatment

[0031] The cut medium density fiberboard is subjected to rough grinding and fine grinding step by step, and then the surface powder is blown off with compressed air to obtain the surface treated medium density fiberboard.

[0032] Step 2. Preheating

[0033] The surface-treated medium density fiberboard is placed in an infrared heater, and preheated at 80-100° C. for 1-2 minutes to obtain a preheated medium-density fiberboard.

[0034] Step three, electrostatic powder spraying

[0035] The leveling powder coating is evenly sprayed on the surface of the preheated medium density fiberboard by electrostatic powder spraying method, and the powder coating thickness after spraying is 100-160 μm, and the medium density fiberboard after electrostatic powder spraying is obtained. ...

Embodiment 2

[0040] The invention discloses an electrostatic coating method of a medium density fiberboard powder coating. The steps of the method described in this embodiment are:

[0041] Step 1. Surface treatment

[0042] The cut medium density fiberboard is subjected to rough grinding and fine grinding step by step, and then the surface powder is blown off with compressed air to obtain the surface treated medium density fiberboard.

[0043] Step 2. Preheating

[0044] The surface-treated medium density fiberboard is placed in an infrared heater, and preheated at 85-105° C. for 1-2 minutes to obtain a preheated medium-density fiberboard.

[0045] Step three, electrostatic powder spraying

[0046] The leveling powder coating is uniformly sprayed on the surface of the preheated medium density fiberboard by electrostatic powder spraying method, and the powder coating thickness after spraying is 110-170 μm, so as to obtain the medium density fiberboard after electrostatic powder spraying...

Embodiment 3

[0051] The invention discloses an electrostatic coating method of a medium density fiberboard powder coating. The steps of the method described in this embodiment are:

[0052] Step 1. Surface treatment

[0053] The cut medium-density fiberboard is subjected to step-by-step rough grinding and fine grinding; then the surface powder is blown off with compressed air to obtain a surface-treated medium-density fiberboard.

[0054] Step 2. Preheating

[0055] The surface-treated medium density fiberboard is placed in an infrared heater, and preheated at 90-110° C. for 1-2 minutes to obtain a preheated medium-density fiberboard.

[0056] Step three, electrostatic powder spraying

[0057] The leveling powder coating is evenly sprayed on the surface of the preheated medium density fiberboard by electrostatic powder spraying method, and the powder coating thickness after spraying is 120-180 μm, so as to obtain the medium density fiberboard after electrostatic powder spraying.

[005...

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Abstract

The invention relates to an electrostatic spraying method for medium-density fiberboard powder coatings. According to the technical scheme, the electrostatic spraying method comprises the steps of rough grinding and fine grinding a cut medium-density fiberboard step by step, blowing off surface powder with compressed air, and then preheating the medium-density fiberboard in an infrared heater at 20-120 DEG C for 1-2 min to obtain the preheated medium-density fiberboard. By adopting the electrostatic spraying method, leveling powder coatings are evenly applied to the surface of the preheated medium-density fiberboard, and the thickness of the power coating after spraying is 100-200 [mu]m; the medium-density fiberboard after electrostatic dusting is obtained. The medium-density fiberboard after electrostatic dusting is placed in the infrared heater, and melted and cured for 5-10 min at 140-170 DEG C, so that the medium-density fiberboard electrostatically coated with the powder coatingsis obtained. The electrostatic spraying method provided by the invention is simple in technology, applicable for industrial production, environmentally friendly, and free from pollution; the power coating of the obtained product is smooth flat, high in adhesion, and excellent in chemical resistance and water resistance.

Description

technical field [0001] The invention belongs to the technical field of medium density fiberboard. In particular, it relates to an electrostatic coating method of medium density fiberboard powder coating. Background technique [0002] Medium density fiberboard (medium density fireboard, MDF) is made of wood fiber or other plant fiber, after crushing, fiber separation and drying, synthetic resin is applied, and the nominal density range is 0.65 ~ 0.80g after being pressed under heat and pressure. / cm 3 of plates. Medium density fiberboard has uniform fiber structure, high bonding strength between fibers, and has excellent physical and mechanical properties, decorative properties and processing properties. Medium density fiberboard is widely used in office furniture, kitchen cabinets, shelves and ordinary furniture. However, the surface of medium density fiberboard is rough, poor in color, without the natural texture of wood, which is neither beautiful, wear-resistant, and e...

Claims

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Application Information

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IPC IPC(8): B27N3/04B27N3/18
CPCB27N3/04B27N3/18
Inventor 周和荣吴磊宋述鹏
Owner WUHAN UNIV OF SCI & TECH
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