A method of producing environment-friendly density board products and a special anti-aging agent

A kind of density board, environmental protection technology, applied in the direction of application, flat products, household components, etc., can solve the problems such as the decline of the living environment quality, the decline of the mechanical properties of the board, and the shortening of the service life of the board, so as to avoid safety hazards and high temperature damage to the equipment. hazards, increased waterproof and moisture-proof performance, and improved aging resistance

Active Publication Date: 2017-09-05
WENAN COUNTY TIANHUA DENSITY BOARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, furniture made of MDF is usually called "disposable furniture", which obviously causes a waste of resources.
[0003] The reason for these problems is that the aging resistance of the adhesive is poor, which is mainly reflected in the cracking of the adhesive film when it is heated, and the decomposition when it is exposed to water.
After a period of time, the film will break and decompose, especially in a humid environment and under sunlight (especially in a sunny environment), resulting in a decrease in the mechanical properties of the board and shortening the service life of the board; the amount of formaldehyde released will also increase. , exceeding the environmental protection requirements, resulting in a decline in the quality of people's living environment
In addition, MDF has poor moisture resistance or MDF does not have strong moisture-proof performance, and the expansion coefficient is large after absorbing water, especially MDF produced with urea-formaldehyde resin glue in a long-term humid environment (such as toilets) ) is difficult to use, these performance shortcomings restrict the application of MDF in furniture, construction and other fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Disperse the solid sodium metaphosphate and potassium aluminum sulfate in the intermediate glue tank for the production of MDF fiberboard, and use it up within one hour; add 3.5kg of sodium metaphosphate and 6kg of sulfuric acid to the quantitative 600kg glue intermediate tank Potassium aluminum, stir well, use up in one hour; use two intermediate tanks in rotation.

Embodiment 2

[0026] Mix solid sodium metaphosphate and potassium aluminum sulfate into a mixed aqueous solution with a mass ratio of 5-15%, and add it to the pulp tube for producing medium-density fiberboard; the solution prepared in this example is called a special anti-aging agent solution: 500L In the tank, add 300kg of water, 15kg of sodium metaphosphate, and 20kg of potassium aluminum sulfate. Before the glue pump for producing medium density fiberboard, the special anti-aging agent solution and glue are mixed according to the volume ratio of 1:20. Glue pump slurry hose.

Embodiment 3

[0028] Add solid sodium metaphosphate and potassium aluminum sulfate to the curing agent solution, and use it in combination with the curing agent solution in the production of medium density fiberboard. The solution prepared in this embodiment is called a special antiaging agent solution: in a 500L tank, add 300kg of water, add 15kg of sodium metaphosphate, and add 20kg of potassium aluminum sulfate. The curing agent solution is mixed with the curing agent. The curing agent used is 20% ammonium chloride solution. The volume ratio of the special anti-aging agent solution and the ammonium chloride solution is 1.5:2.

[0029] The ratio of sodium metaphosphate to potassium aluminum sulfate is 0.5-1.2; by weight, the amount of special anti-aging agent used is 1 / 1000 to 4.5 / 1000 for the production of medium density fiberboard.

[0030] Sodium metaphosphate can make the adhesive film spread evenly in water and during the drying process, without causing local lack of adhesive or loca...

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PUM

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Abstract

The invention relates to a method for manufacturing an environment-friendly density board product and a dedicated anti-aging agent, and belongs to the technical field of medium density board manufacture. The method is characterized in that medium density fiberboards are manufactured, wherein not only a curing agent solution but also sodium metaphosphate and aluminum potassium sulfate are added during glue mixing; the additive amounts of sodium metaphosphate and aluminum potassium sulfate are determined by the yield of the medium density fiberboards, that is, 0.5-2.8 kg of sodium metaphosphate and 1-3 kg of aluminum potassium sulfate are added when one cubic meter of medium density fiberboards are manufactured. The method and the anti-aging agent have the benefits that on one hand, the shrinkage of an adhesive film can be prevented, on the other hand, the waterproof performance of the adhesive film can be improved, so that the waterproof performance and the moisture-proof performance of the medium density fiberboards can be improved, the anti-aging purpose can be achieved, and the service life of a medium density fiberboard product such as medium density fiberboard furniture can be prolonged; as the anti-aging performance of the medium density fiberboards is improved, the emission increasement of formaldehyde can be restricted, the safety performance and the environmental protection performance can be greatly improved, and then the application field of the medium density fiberboards can be extended.

Description

technical field [0001] The invention relates to a method for producing environment-friendly density board products and a special antiaging agent, belonging to the technical field of medium density board production. Background technique [0002] MDF fiberboard is made of wood fiber or other plant fiber, and is made of urea-formaldehyde resin or other suitable adhesives, with a density of 0.5-0.88g / cm 3 of plates. The density of medium density board is close to that of wood. Because it is made by adding wood fiber into adhesive through high temperature and high pressure, its density is relatively uniform, and its mechanical properties are close to that of wood. It is a popular artificial board in the world. At present, medium-density fiberboard is mainly used to make furniture after veneering. The service life of MDF products on the existing market is relatively short. Often after more than 5 years of use, the veneer will fall off, the door will not close, and the hinge will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/04C09J11/06B27N3/04
Inventor 王锌王文昌
Owner WENAN COUNTY TIANHUA DENSITY BOARD
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