Coating pretreatment process for discoloration-resistant paint

A technology of discoloration resistance and pretreatment, which is applied in the direction of pretreatment surface, device for coating liquid on the surface, coating, etc. Paint and coating work efficiency and other issues, to improve the effect of discoloration resistance, shorten the residence time, and ensure the uniformity of hot air

Pending Publication Date: 2022-07-29
ZHEJIANG LINGGE WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the drying period of the release paint of the above-mentioned technical solution is too long, which seriously reduces the efficiency of the entire paint coating work, and its technical solution of increasing the coating of water-based release paint is only applicable to the painting process of water-based paint, and cannot be more widely applicable Anti-discoloration pretreatment for coating process of various assembly line operations such as UV paint and PU paint
At the same time, due to the long drying cycle of the isolation paint, the paint film formed by the isolation paint layer has been completely cooled after a long drying time, thus affecting the adhesion between it and the subsequent paint coating.
Moreover, after long-term production practice, the treatment effect of the anti-discoloration treatment process of this technical solution is not good, and after a period of use, discoloration phenomena such as yellowing and redness will still occur on the painted workpiece

Method used

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  • Coating pretreatment process for discoloration-resistant paint
  • Coating pretreatment process for discoloration-resistant paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: a kind of discoloration-resistant paint coating pretreatment process, the treatment process is implemented between the paint finish sanding process and the water-based primer coating process, and sequentially includes the coating step of the water-based discoloration-resistant paint, and the water-based discoloration-resistant paint. Paint curing step. Among them, the water-based discoloration-resistant paints used are commercially available, such as German Jenver anti-yellowing primers or anti-red primers. In this example, the disc bean is treated, so the German kenfor yellow-resistant primer is selected. If the treatment is for Jatoba, the German kenfor-resistant red primer can be selected.

[0032] By means of the above method, curing the water-based discoloration-resistant paint through a high-temperature thermal curing process can effectively shorten the curing time of the water-based discoloration-resistant paint and improve the work efficiency of th...

Embodiment 2

[0039] Example 2: The difference between Example 2 and Example 1 is that the curing step of the waterborne discoloration-resistant paint includes multiple thermal curing stages and a buffer stage connecting adjacent thermal curing stages. For example, after finishing the coating of the water-based discoloration-resistant paint, the painted workpiece 400 passes through the leveling section 200, and then sequentially enters the first heat curing stage, the first buffer stage, the second heat curing stage, and the second heat curing stage. The second buffer stage and the third heat curing stage are used to complete the curing step of the water-based discoloration-resistant paint. By dividing the curing step of the water-based discoloration-resistant paint into multiple thermal curing stages, the time during which the painted workpiece 400 is in a single thermal curing stage can be shortened, so as to reduce the influence of high temperature on the moisture content of the painted w...

Embodiment 3

[0049] The difference between Example 3 and Example 1 is that the coating step of the waterborne discoloration-resistant paint, the leveling step of the waterborne discoloration-resistant paint, and the curing step of the waterborne discoloration-resistant paint are repeated twice.

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Abstract

The embodiment of the invention discloses a discoloration-resistant paint coating pretreatment process which is implemented between a paint facing sanding procedure and a water-based primer coating procedure and sequentially comprises a water-based discoloration-resistant paint coating step and a water-based discoloration-resistant paint curing step, the temperature of the water-based discoloration-resistant paint curing step ranges from 90 DEG C to 110 DEG C, and the water-based discoloration-resistant paint curing step ranges from 90 DEG C to 110 DEG C; the curing time is 50 to 70 seconds. The anti-discoloration pretreatment process is relatively high in production efficiency, relatively good in anti-discoloration effect and relatively long in effect duration time, can be simultaneously used as an anti-discoloration pretreatment process of various coating processes such as UV paint, PU paint and water-based paint, and is relatively high in adhesive force with a subsequent paint coating.

Description

technical field [0001] The invention relates to the technical field of decorative paint coating on the surface of wood materials, in particular to a paint coating pretreatment process that is resistant to discoloration, in particular to a paint coating pretreatment process that can prevent paint from turning yellow and red. Background technique [0002] The wooden floor is more than the surface coated with paint to increase the decorative effect, protect the wood surface, and improve the dimensional stability of the product. However, no matter what kind of paint is used for paint decoration, after the wood paint finish is exposed to sunlight for a period of time, the ultraviolet light in the sunlight acts on the inclusions in the wood, causing the problem of discoloration of the wood paint finish. Yellowing, reddish discoloration. Especially high-end hard broad-leaved woods such as Merbau, disc bean and Jatoba. [0003] In the prior art, Chinese invention patent 2018114568...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/04B05D3/02B05D1/28
CPCB05D3/0413B05D3/0263B05D1/28
Inventor 刘彬彬肖亦鸿张锦新叶经云康志平苏昌中
Owner ZHEJIANG LINGGE WOOD
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