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Method for improving adhesion between wood and paint film

A paint film adhesion and wood technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of affecting the surface paint film adhesion, shortening the service life of wood, and heavy texture, so as to achieve mechanical properties without damage, Enhanced adhesion and increased specific surface area

Inactive Publication Date: 2019-08-06
FUNAN HUIFENG HOUSEHOLD CRAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country's timber resources are abundant, such as larch wood, which is heavy and solid in texture, strong in compression and bending, and good in corrosion resistance. It is an excellent material for poles, sleepers, bridges, mine pillars, vehicles, buildings, etc. , when it is applied, it often needs to be coated. However, proper surface treatment must be done before coating. If the surface treatment of wood is not improved, it will greatly affect the adhesion of the surface paint film, and also Will shorten the service life of the wood itself

Method used

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  • Method for improving adhesion between wood and paint film

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Effect test

Embodiment 1

[0016] A method for improving the adhesion between wood and paint film, including the following steps:

[0017] (1) Put the wood into a sealed device, and pass hydrogen into it. When the pressure reaches 0.5MPa, stop the flow, keep the pressure treatment for 20min, then pump to vacuum -0.08MPa, after 30min of vacuum treatment, pass into it Argon gas, until the pressure is 1.2MPa, keep the pressure for 40min, vacuum again to -0.08MPa, keep for 20min, and return to normal pressure;

[0018] (2) Use a modifier to coat the wood obtained in step (1), put it into the sealing device after coating, repeat the operation and treatment steps of step (1) again, and finally return to normal pressure;

[0019] (3) Put the wood obtained in step (2) into a 62°C water bath to soak for 2 hours, then take it out and soak it in an acetic acid solution again, keep it for 35 hours, and then dry it with supercritical carbon dioxide fluid; the concentration of the acetic acid solution is 8%;

[0020] (4) Tre...

Embodiment 2

[0023] A method for improving the adhesion between wood and paint film, including the following steps:

[0024] (1) Put the wood into a sealed device, and pass hydrogen into it. When the pressure reaches 0.7MPa, stop the flow, keep the pressure for 25min, then vacuum to -0.085MPa, after 40min of vacuum treatment, pass into it Argon gas, until the pressure is 1.3MPa, hold the pressure for 50min, vacuum again to -0.085MPa, hold for 25min, and return to normal pressure;

[0025] (2) Use a modifier to coat the wood obtained in step (1), put it into the sealing device after coating, repeat the operation and treatment steps of step (1) again, and finally return to normal pressure;

[0026] (3) Put the wood obtained in step (2) into a 63°C water bath to soak for 3 hours, then take it out and soak it in an acetic acid solution again for 38 hours, and then dry it with supercritical carbon dioxide fluid; the concentration of the acetic acid solution is 9%.

[0027] (4) Treat the wood obtained i...

Embodiment 3

[0030] A method for improving the adhesion between wood and paint film, including the following steps:

[0031] (1) Put the wood into a sealed device, and pass hydrogen gas into it. When the pressure reaches 0.8MPa, stop the gas flow, keep the pressure for 30min, then vacuum to -0.09MPa, and pass it into the vacuum after 50min Argon gas, until the pressure is 1.5MPa, hold the pressure for 60min, vacuum again to -0.09MPa, hold for 30min, and return to normal pressure;

[0032] (2) Use a modifier to coat the wood obtained in step (1), put it into the sealing device after coating, repeat the operation and treatment steps of step (1) again, and finally return to normal pressure;

[0033] (3) Put the wood obtained in step (2) into a 65°C water bath to soak for 3 hours, then take it out and soak it in an acetic acid solution again for 39 hours, and then dry it with supercritical carbon dioxide fluid; the concentration of the acetic acid solution is 10%.

[0034] (4) Treat the wood obtained ...

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Abstract

The invention discloses a method for improving the adhesion between wood and a paint film. Wood treated with the method has good adhesion to the paint film, the adhesion can reach level 0, and treatment significantly improves the mechanical properties of the wood. The wood is subjected to high pressure maintaining-vacuum treatment with lowest molecular weight gas hydrogen to take away impurities and water vapor in fine gaps of wood fibers and open the fine gaps, and then is subjected to high pressure maintaining-vacuum treatment with high molecular weight gas argon to make the argon enter theopened gaps of the wood fibers, further expand cell wall gaps of the wood and maintain the stability of the frame structure of the wood, so the specific surface area of the treated wood is increased, the adhesion of a subsequent modifier is benefited, the adhesion of the paint film is improved, and the mechanical properties of the wood are protected from being damaged.

Description

Technical field [0001] The invention belongs to the technical field of wood treatment, in particular to a method for improving the adhesion between wood and paint film. Background technique [0002] my country is rich in wood resources, such as larch wood, which is heavy and solid, has high compression and bending strength, and has good corrosion resistance. It is an excellent material for electric poles, sleepers, bridges, mine pillars, vehicles, buildings, etc. In application, it is often necessary to coat it, but it must be properly surface treated before coating. If the surface treatment of the wood is not improved, it will greatly affect the adhesion of the surface paint film and also Will shorten the service life of the wood itself. Summary of the invention [0003] In view of the above problems, the present invention aims to provide a method for improving the adhesion between wood and paint film. [0004] The present invention is realized through the following technical solut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/02B27K3/52B27K5/04B27K3/34B27K5/00
CPCB27K3/0271B27K3/08B27K3/34B27K3/52B27K5/0015B27K5/04
Inventor 丁保忠孙传金丁兰涛杨慧慧
Owner FUNAN HUIFENG HOUSEHOLD CRAFT
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