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Process for coating a substrate

A substrate and coating technology, applied in the direction of surface coating liquid devices, coatings, paper coatings, etc., can solve problems such as lack of coating

Inactive Publication Date: 2006-06-21
阿克佐 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the coating cannot be obtained by irradiation, because the part of the coating that penetrates the substrate will not cure during the irradiation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0061] A medium density fiberboard (MDF) substrate is placed on a conveyor belt moving at a speed of 15 m / min, and a white pressure paint emulsion (pbw represents parts by weight) comprising the following components is applied:

[0062] 26.7pbw of water;

[0063] T of 20.7pbw gAcrylic polymer at 34°C;

[0064] 16.8pbw of pigment;

[0065] 31.5pbw of filler mix; and

[0066] 4.3pbw additive mixture at 15-20g / m 2 The amount applied to the MDF substrate. The pressure paint is dried by passing the MDF substrate through an oven at a temperature of 150-200° C. and a pressure of about 1 N / mm 2 A pair of calender rolls presses and cures the pressure coating.

[0067] On the coating film formed in this way, use a curtain coating machine at 100g / m 2 A white solventborne topcoat (Proff 355NCS S-0502Y available from Akzo Nobel Wood Coatings AB Sweden, diluted to 50 wt% solids) was applied. The topcoat is cured by passing the substrate through a second oven.

[0068] The entire pr...

Embodiment 1B

[0069] Embodiment 1B (comparative example)

[0070] As a control, a coated MDF substrate was prepared using the same conditions, but without pressure coating. In the first step, a solvent-borne sealant coating (Proff Surf 150 available from Akzo Nobel Wood CoatingsAB Sweden) is applied; m 2 amount applied. In order to obtain a substrate with the same performance and appearance as in Example 1A, the sealant coating must be applied at 100 g / m 2 amount applied.

[0071] Contrast that with Example 1A, where 100% more solvent had to be used to obtain a coated MDF substrate with the same performance and appearance. Furthermore, the energy consumption of the entire process is higher in this comparative example due to the greater amount of solvent that has to be evaporated off.

Embodiment 2A

[0073] A medium density fiberboard (MDF) substrate was placed on a conveyor belt moving at a rate of 15 m / min, and the white pressure paint of Example 1A was applied at 15-20 g / m 2 The amount applied to the MDF substrate. The pressure paint is dried by passing the MDF substrate through an oven at a temperature of 150-200° C. and a pressure of about 1 N / mm 2 A pair of calender rolls presses and cures the pressure coating.

[0074] On the coating film formed in this way, use a curtain coating machine at 100g / m 2 A white topcoat (IC 102 Ikeawhite No. 5, available from Akzo Nobel Wood Coatings AB Sweden, diluted to 35 wt% solids) was applied. The topcoat is cured by passing the substrate through a second oven.

[0075] The entire process takes place on a single line without removing the substrate from the conveyor belt.

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Abstract

The invention relates to a process for coating of a wooden, wood-like and / or cellulose-containing substrate comprising the steps of, a) applying a press coating to the substrate, b) applying heat and pressure to the coated substrate to the cure the press coating and to obtain a substrate with a smooth coating film, with the pressure being such that the substrate is not substantially compressed, c) applying a top coat on the substrate after the curing of the press coating, and d) curing said on top coat. As a result of this process, the amount of unreacted double bonds in the coated substrate is at a low level.

Description

technical field [0001] The present invention relates to a method for coating wooden, wood-like and / or cellulose-containing substrates such as solid wood, wooden plywood, impregnated paper or reconstituted wooden substrates. Background technique [0002] Reconstituted wood substrates are substrates made from small pieces of wood, fibers, shavings or wood chips, such as hardboard, medium density fiberboard, oriented strand board (also known as veneer board), particle board, particle board and particle board. Such reconstituted wood substrates are typically manufactured from chips, fibers, wood shavings or wood chips under heat and pressure. Reconstructed wood substrates are typically produced by treating chips, shavings, chips or fibers with a binder and then arranging these treated chips, shavings, chips or fibers in a mat form under dry or wet conditions. Production. The mat is then compressed by the application of heat and pressure into a dense substrate, typically in she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B05D3/06B05D3/12B05D7/00B05D7/06B27K3/34B27K5/04B41M7/00D21H19/82D21H23/00D21H25/06D21J1/08
CPCB05D3/067B05D3/12B05D7/06B05D7/546D21H19/82D21H25/06
Inventor L·T·佩尔松A·K·B·谢尔奎斯特 林德尔
Owner 阿克佐