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

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 ...

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