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A coating process of pu sealing primer

A technology for sealing primer and coating process, which is applied to the device, coating, epoxy resin coating and other directions of coating liquid on the surface, which can solve the problem of ineffective removal, and achieve the effect of reducing formaldehyde pollution and easy process operation.

Active Publication Date: 2019-02-12
ZHUODA NEW MATERIALS TECH GRP WEIHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing sealing primer cannot effectively remove and seal the formaldehyde component in the board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Prepare materials, heat wood-based panels according to the following heating temperature and time steps: 50, 50s→100℃, 20s→200℃, 5s→400℃, 1s→200℃, 10s→100℃, 20s→50 ℃,50s→room temperature;

[0022] (2) Clean up the floating dust on the board, then roll-coat PU sealing primer on the front, pressurize and dry, the pressure is 5.5N / cm2, and the drying time is 2min; sanding, then perform a second roll coating, leveling and drying;

[0023] (3) Clean up the floating dust on the board, then roll coat the PU sealing primer on the reverse side, pressurize and dry, the pressure is 5.5N / cm2, and the drying time is 2min; sanding, and then perform a second roll coating, leveling and drying.

[0024] Wherein, the PU sealing primer is composed of main agent: curing agent: diluent=1:0.2:0.5 by mass ratio;

[0025] Wherein, in terms of mass fraction, the main agent includes the following components: 30 parts of epoxy resin, 20 parts of epoxidized castor oil, 10 parts of ethyl aceta...

Embodiment 2

[0029] (1) Prepare materials, heat wood-based panels according to the following heating temperature and time steps: 60°C, 60s→150°C, 30s→250°C, 10s→500°C, 5s→250°C, 15s→150°C, 30s→ 60℃,60s→room temperature;

[0030] (2) Clean up the floating dust on the board, then roll-coat PU sealing primer on the front, pressurize and dry, the pressure is 5.5N / cm2, and the drying time is 2min; sanding, then perform a second roll coating, leveling and drying;

[0031] (3) Clean up the floating dust on the board, then roll coat the PU sealing primer on the reverse side, pressurize and dry, the pressure is 5.5N / cm2, and the drying time is 2min; sanding, and then perform a second roll coating, leveling and drying.

[0032] Wherein, the PU sealing primer is composed of main agent: curing agent: diluent=1:0.6:0.7 by mass ratio;

[0033] Wherein, in terms of mass fraction, the main agent includes the following components: 40 parts of epoxy resin, 30 parts of epoxidized castor oil, 15 parts of eth...

Embodiment 3

[0037] (1) Prepare materials, heat wood-based panels according to the following heating temperature and time steps: 55°C, 55s→120°C, 25s→220°C, 8s→450°C, 1.5s→220°C, 12s→120°C, 25s →55℃, 55s→room temperature;

[0038] (2) Clean up the floating dust on the board, then roll-coat PU sealing primer on the front, pressurize and dry, the pressure is 5.5N / cm2, and the drying time is 2min; sanding, then perform a second roll coating, leveling and drying;

[0039] (3) Clean up the floating dust on the board, then roll coat the PU sealing primer on the reverse side, pressurize and dry, the pressure is 5.5N / cm2, and the drying time is 2min; sanding, and then perform a second roll coating, leveling and drying.

[0040] Wherein, the PU sealing primer is composed of main agent: curing agent: diluent=1:0.4:0.6 by mass ratio;

[0041] Wherein, in terms of mass fraction, the main agent includes the following components: 35 parts of epoxy resin, 205 parts of epoxidized castor oil, 12 parts of ...

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PUM

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Abstract

The invention discloses a PU seal primer coating process. According to the process, plates are subjected to temperature treatment according to a certain gradient, roller coating of PU seal primer is performed twice, and pressure drying is performed. The production process is easy and convenient to operate, residual formaldehyde of the plates can be effectively removed, the formaldehyde which is not emitted can be prevented from drifting into the air after the seal primer forms film, and accordingly pollution by the formaldehyde is reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a coating process of a PU sealing primer. Background technique [0002] Today, the world's forest resources are gradually decreasing, and solid wood furniture uses a large amount of wood, which is a predatory possession of nature and has no positive significance for the protection of the ecological environment. Under such a market background, plywood, fiberboard and other boards are widely used in home decoration, but due to technical reasons, a large amount of urea-aldehyde resin, adhesive and other substances containing formaldehyde will be used in the production of such materials. Exposure to the air for a long time emits, but a certain amount of formaldehyde still remains in the interior and surface of the board, and these residual formaldehyde will be slowly released into the household environment to cause pollution. The acute toxicity of formaldehyde to the human ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/63B05D1/28B05D1/38B05D3/00
CPCB05D1/28B05D1/38B05D3/00C09D7/63C09D163/00C08L91/00C08K5/101
Inventor 杨卓舒李知勇孙吉利余中华陈强展庆月
Owner ZHUODA NEW MATERIALS TECH GRP WEIHAI CO LTD
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