Flame-retardant decorative board and its preparation method and flame-retardant material including the flame-retardant decorative board

Abstract

The invention provides a flame-retardant decorative plate and a preparation method thereof. The flame-retardant decorative plate comprises a plate component and a flame-retardant adhesive layer which is at least attached on at least one side surface of the plate component in the thickness direction and formed by an adhesive containing a flame-retardant adhesive, the plate component at least comprises a layer of wood veneer, the flame-retardant adhesive contains water-soluble amine resin, a dehydration catalyst, a char forming agent and auxiliaries, and the flame-retardant adhesive contains water or does not contain the water; the dehydration catalyst is selected from one or more of ammonium polyphosphate, melamine orthophosphate and melamine pyrophosphate; and the degree of polymerization of the ammonium polyphosphate is above 20. The invention further provides a flame-retardant material. The gluing performance of the flame-retardant decorative plate prepared by the method disclosed by the invention can meet the requirements of national standard and the flame retardance can be given to a base material; furthermore, the mechanical properties of the base material can not be affected, the formaldehyde release amount is also above E1 grade, and the flame-retardant decorative plate is safe and environment-friendly; and simultaneously, the natural texture of wood is kept and the decorative effect is good.

Description

technical field [0001] The invention relates to a flame-retardant decorative board, a preparation method thereof and a flame-retardant material comprising the flame-resistant decorative board. Background technique [0002] The mandatory standard of "Flame Retardant Products and Components Combustion Performance Requirements and Labels in Public Places" (GB20286-2006) stipulates that products and components entering public places must have a certain level of flame retardant performance. Wood products used in household and public places are flammable materials, which constitute a hidden danger of building fires. With the popularity of wood products in household and public places, fire safety issues have become more prominent. In consideration of the safety of human life and property, it is very necessary to use wood materials with flame retardant function, and it is also the most concerned issue in the industry. [0003] At present, there are many researches on the fire-reta...

AI Technical Summary

Problems solved by technology

This method is a method of pressurizing and impregnating flame retardants. There are certain problems in this wood treatment method: (1) The flame retardant must be soluble in water and impregnated into the wood in liquid form. Therefore, the penetration of tree species (2) Most of the inorganic flame retardants cannot form a chemical bond with wood, and are prone to surface precipitation, which affects subsequent secondary processing; (3) The above-mentioned flame retardants have adverse effects on the physical and mechanical properties of wood, such as MOR (static bending strength), MOE (modulus of elasticity) decrease, and brittleness increase; (4) in order to achieve a higher flame retardant level, it is necessary to increase the (5) The treated wood must be dried twice, which is easy to cause secondary cracking and deformation of the wood, and increase the loss

The method of attaching the flame retardant to the surface of the veneer by soaking or coating first, and then applying the adhesive will cause the following problems: (1) The flame retardant veneer is covered by the flame retardant, which inactivates the surface activity of the wood, Moreover, the flame retardant will affect the curing characteristics of the adhesive, thereby affecting the bonding strength of the product; (2) The flame retardant treatment of the veneer is not only complicated in process, but also increases the drying energy consumption and the breakage rate of the veneer, and the level of the surface plate is reduced

The problems that will occur when using the above method to deal with MDF are: (1) The flame retardant will affect the curing characteristics of the adhesive, thereby affecting the bonding strength of the product; (2) When the flame retardant and the adhesive are mixed, once the equipment fails , the adhesive mixture in storage tanks and pipelines should be cleaned up in time, otherwise it may cause pipeline blockage; (3) The main problem of flame-retardant MDF is that the water-absorbing thickness expansion rate increases significantly and the strength decreases, especially the surface bonding strength does not meet the standard Requirements, increasing the amount of sizing and increasing the density of the product can partially compensate for the above shortcomings, but the processing performance and use performance of the product are significantly reduced

The problems in this method of processing flame-retardant particleboard are: (1) the above-mentioned flame retardant will produce thermal decomposition during the drying process of the shavings, which will reduce the flame-retardant effect, increase the drying load, and increase energy consumption; (2) the flame-retardant The method of mixing the agent with the adhesive may affect the storability, curing performance and bonding performance of the adhesive. The amount of the flame retardant applied in this method is limited, and it is difficult to meet the requirements of a higher flame retardant level; (3) adding The flame retardant method is simple, but the mechanical properties of the particleboard drop significantly, and not all types of paving processes are suitable for adding flame retardants; (4) If the finished particleboard is treated by pressure impregnation with flame retardant, the product The performance of the product has a great influence, and the product must use water-resistant resin adhesives such as phenolic resin or melamine modified urea-formaldehyde resin

This flame retardant treatment method has brought many adverse effects, such as complex treatment process, reducing the physical and mechanical properties of the material, adversely affecting the curing performance of the adhesive, affecting the subsequent secondary processing performance, and increasing energy consumption due to repeated drying, etc.