Interlayer flame-retardant facing artificial board and preparation method thereof

Abstract

According to the intercalated flame-retardant veneer artificial board and the preparation method thereof, the intercalated flame-retardant veneer artificial board is used as a flame-retardant barrier, and the flame-retardant veneer artificial board with high flame-retardant performance is prepared through the steps of preparation of a flame-retardant adhesive, design of a hot-pressing process and the like. The preparation process and the flame-retardant artificial board veneer for preparation can be widely applied to flame retardance of various artificial boards, are particularly suitable for shaving boards, plywood, medium-density fiberboards and other artificial boards, and can greatly enhance the flame retardance of the artificial boards.

Description

Technical Field

[0001] This invention belongs to the field of building materials, specifically the preparation of inorganic intercalated flame-retardant artificial board veneer materials and the preparation method of flame-retardant veneer artificial boards. Technical Background

[0002] Wood-based panels have a wide range of applications in construction, furniture, decoration and other fields. They have advantages such as adjustable size and thickness, uniform texture, high quality and low price, and high aesthetic appeal. However, their flammability limits their large-scale application in public places, and the demand for flame-retardant decorative wood-based panels is becoming increasingly urgent.

[0003] Current research on flame retardancy of decorative engineered wood panels mainly focuses on three aspects: adding flame retardants to the panels, flame retardant treatment of the constituent units of engineered wood panels (veneer, wood chips, wood flour), and flame retardant modification of engineered wood panel adhesives. The flame retardants used are mostly nitrogen and phosphorus-based flame retardants, such as ammonium polyphosphate, guanidine phosphate, diammonium hydrogen phosphate, and ammonium dihydrogen phosphate, which retard wood materials through a combination of gas-phase and solid-phase flame retardancy.

[0004] Currently, flame-retardant engineered wood products manufactured using the above methods generally suffer from reduced mechanical strength, especially particleboard, where the strength reduction is particularly prominent. This is mainly because the addition of flame retardants disrupts the bond between the adhesive and the structural units of the engineered wood. Furthermore, flame-retardant engineered wood products also suffer from poor water resistance, complex manufacturing processes, and high costs, limiting their large-scale production and commercial application. Summary of the Invention

[0005] The technical problem solved by this invention is to provide an intercalated flame-retardant veneer engineered wood panel and its preparation method. This invention uses an intercalated flame-retardant engineered wood panel veneer as the main body, and prepares the flame-retardant veneer engineered wood panel by attaching the manufactured flame-retardant veneer to the surface of a veneer using a modified adhesive. This method can also be used to produce other types of flame-retardant composite panels, such as flame-retardant veneer bamboo laminated timber and flame-retardant veneer wood-plastic composite panels.

[0006] The technical problem solved by this invention is achieved by the following technical solution:

[0007] An intercalated flame-retardant decorative panel and its preparation method include the following steps:

[0008] (1) Preparation of flame retardant adhesive: Nitrogen-phosphorus flame retardant and inorganic particles are added to the adhesive in a certain proportion and stirred quickly until evenly dispersed to obtain flame retardant adhesive.

[0009] (2) Preparation of intercalated flame-retardant artificial board veneer: The surface of the veneer material is coated with the flame-retardant adhesive prepared in (1) by roller coating and combined with alkali-free glass fiber cloth to obtain intercalated flame-retardant artificial board veneer.

[0010] (3) Intercalated flame-retardant decorative artificial board and its preparation: The flame-retardant adhesive prepared in (1) is rolled onto the surface of the artificial board, and then the flame-retardant decorative layer prepared in (2) is covered onto the adhesive layer surface. After flattening, it is hot-pressed. After hot pressing, the intercalated flame-retardant decorative artificial board is obtained.

[0011] To ensure the excellent performance of the prepared sample, as a preferred option, the nitrogen-phosphorus flame retardant in the preparation of the flame retardant adhesive in step (1) above is one or more of the following: ammonium polyphosphate, melamine phosphate, melamine polyphosphate, piperazine pyrophosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, and guanidine phosphate.

[0012] Preferably, in the preparation of the flame-retardant adhesive in step (1) above, the adhesive is one or more of the following: urea-formaldehyde resin adhesive, phenolic resin adhesive, melamine-formaldehyde resin adhesive, melamine-modified urea-formaldehyde resin adhesive, melamine-modified phenolic resin adhesive, isocyanate adhesive, polyvinyl acetate adhesive, and soybean protein adhesive.

[0013] Preferably, in the preparation of the flame-retardant adhesive in step (1) above, the inorganic particles are one or more of SiO2, TiO2, ZnO, Al2O3, MgO, and MgOH.

[0014] Preferably, in the preparation of the flame retardant adhesive in step (1) above, the mass ratio of nitrogen-phosphorus flame retardant, inorganic particles and adhesive is 1-5:1-5:10.

[0015] Preferably, in the preparation of the flame retardant adhesive in step (1) above, the stirring temperature is 25-45℃, the stirring time is 5-10 min, and the mixture exhibits a state without particle aggregation.

[0016] Preferably, the finishing material in step (2) can be one or more of the following: veneer, melamine-impregnated paper, and PVC film.

[0017] Preferably, the amount of adhesive applied to the surface of the finishing material in step (2) above is 50 g / m². 2 ~150g / m 2 .

[0018] Preferably, the thickness of the alkali-free glass fiber cloth in step (2) is 0.1 mm to 2 mm, and the number of bonding layers is 1 to 5.

[0019] Preferably, the engineered wood panel in step (3) can be plywood, particleboard, fiberboard, blockboard, honeycomb board, or any of the subcategories of the above-mentioned panels.

[0020] Preferably, the amount of adhesive applied to the surface of the engineered wood panel in step (3) above is 50 g / m². 2 ~150g / m 2 .

[0021] Preferably, the hot pressing temperature in step (3) is 85℃~150℃, the hot pressing time is 30s~600s, and the hot pressing pressure is 0.5MPa~2MPa.

[0022] Specific Implementation Cases

[0023] To better illustrate the technical means and preparation process of this invention, the invention will be described below with reference to specific implementation examples.

[0024] Example 1

[0025] First, ammonium polyphosphate, nano-SiO2, and urea-formaldehyde resin were blended at a mass ratio of 1:1:4 to obtain slurry A. Slurry A was then rapidly stirred at 30°C for 10 minutes to obtain flame-retardant adhesive B. Flame-retardant adhesive B was then coated onto a thin wood veneer material using a coating roller at a coating weight of 75 g / m². 2 A 0.2mm thick alkali-free fiberglass cloth is then laminated onto the surface of the thin wood to obtain an intercalated flame-retardant engineered wood veneer. Flame-retardant adhesive B is applied to the surface of a 16mm thick particleboard using a coating roller at a coating weight of 100g / m². 2 The resulting particleboard is coated with adhesive. The intercalated flame-retardant engineered wood veneer is then bonded to the coated particleboard and placed in a hot press for hot pressing at a temperature of 105℃ for 240 seconds and a pressure of 1.5MPa. After hot pressing, the intercalated flame-retardant engineered wood particleboard is removed.

[0026] The intercalated flame-retardant veneer particleboard obtained as described above has been tested and found to meet the B1 grade of GB8624-2012 "Classification of Burning Performance of Building Materials and Products", and also meets the Class I impregnation peeling resistance of GB / T 15104-2021 "Decorative Veneer Faced Wood-based Panels" physical and chemical performance indicators, with formaldehyde emission reaching E NF Grade A. The above properties meet the application requirements of flame-retardant engineered wood panels in decoration, construction, furniture and other fields.

[0027] Table 1 Physicochemical Properties

[0028]

[0029]

[0030] Table 2 Combustion Performance Indicators

[0031]

[0032]

[0033] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the embodiments described above. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An intercalated flame-retardant decorative panel and its preparation method, comprising the following steps: (1) Preparation of flame retardant adhesive: Nitrogen-phosphorus flame retardant and inorganic particles are added to the adhesive in a certain proportion and stirred quickly until evenly dispersed to obtain flame retardant adhesive. (2) Preparation of intercalated flame-retardant artificial board veneer: The surface of the veneer material is coated with the flame-retardant adhesive prepared in (1) by roller coating and combined with alkali-free glass fiber cloth to obtain intercalated flame-retardant artificial board veneer. (3) Intercalated flame-retardant decorative artificial board and its preparation: The flame-retardant adhesive prepared in (1) is rolled onto the surface of the artificial board, and then the flame-retardant decorative layer prepared in (2) is covered onto the adhesive layer surface. After flattening, it is hot-pressed. After hot-pressing, the intercalated flame-retardant decorative artificial board is obtained. To ensure the excellent performance of the prepared sample, as a preferred option, the nitrogen-phosphorus flame retardant in the preparation of the flame retardant adhesive in step (1) above is one or more of the following: ammonium polyphosphate, melamine phosphate, melamine polyphosphate, piperazine pyrophosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, and guanidine phosphate. Preferably, in the preparation of the flame-retardant adhesive in step (1) above, the adhesive is one or more of the following: urea-formaldehyde resin adhesive, phenolic resin adhesive, melamine-formaldehyde resin adhesive, melamine-modified urea-formaldehyde resin adhesive, melamine-modified phenolic resin adhesive, isocyanate adhesive, polyvinyl acetate adhesive, and soybean protein adhesive. Preferably, in the preparation of the flame-retardant adhesive in step (1) above, the inorganic particles are one or more of SiO2, TiO2, ZnO, Al2O3, MgO, and MgOH; Preferably, in the preparation of the flame retardant adhesive in step (1) above, the mass ratio of nitrogen-phosphorus flame retardant, inorganic particles and adhesive is 1-5:1-5:

10. Preferably, in the preparation of the flame retardant adhesive in step (1) above, the stirring temperature is 25-45℃, the stirring time is 5-10 min, and the mixture exhibits a state without particle aggregation. Preferably, the finishing material in step (2) above can be one or more of the following: veneer, melamine-impregnated paper, and PVC film; Preferably, the amount of adhesive applied to the surface of the finishing material in step (2) above is 50g / m2 to 150g / m2; Preferably, the thickness of the alkali-free glass fiber cloth in step (2) is 0.1 mm to 2 mm, and the number of bonding layers is 1 to 5. Preferably, the artificial board in step (3) above can be plywood, particleboard, fiberboard, blockboard, honeycomb board, or a sub-category of the above boards. Preferably, the amount of adhesive applied to the surface of the artificial board in step (3) above is 50g / m2 to 150g / m2; Preferably, the hot pressing temperature in step (3) is 85℃~150℃, the hot pressing time is 30s~600s, and the hot pressing pressure is 0.5MPa~2MPa.

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