CN109318338B - Layered flame-retardant artificial board, manufacturing method thereof and application of surface layer flame retardant in flame-retardant material - Google Patents
Layered flame-retardant artificial board, manufacturing method thereof and application of surface layer flame retardant in flame-retardant material Download PDFInfo
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- CN109318338B CN109318338B CN201810932183.9A CN201810932183A CN109318338B CN 109318338 B CN109318338 B CN 109318338B CN 201810932183 A CN201810932183 A CN 201810932183A CN 109318338 B CN109318338 B CN 109318338B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
Abstract
The layered flame-retardant artificial board comprises surface layers (101 and 103) applied with surface layer flame retardants and a core layer (102) applied with core layer flame retardants, wherein the surface layer flame retardants are flame retardants for inhibiting flame spread and/or reducing smoke yield, and the core layer flame retardants are char flame retardants for promoting char formation. The flame retardant efficiency of the artificial board can be improved, and the influence of the flame retardant on the mechanical property of the artificial board can be reduced.
Description
Technical Field
The invention relates to a layered flame-retardant artificial board, a manufacturing method thereof and application of a surface layer flame retardant in a flame-retardant material.
Background
The artificial board is a board which is made by using wood or other non-wood plants as main raw materials, processing and separating the wood or other non-wood plants into various unit materials, and then applying adhesive and other additives for gluing. With the wide application of artificial boards and the general requirement for the fire retardant performance of building materials, the fire retardant treatment of artificial boards becomes a vital technology.
However, the flame-retardant artificial board in the current market uniformly implements the whole artificial board or implements single flame-retardant treatment on a pure surface layer, does not consider the combustion rule and the structural characteristics of the artificial board, and has low flame-retardant efficiency.
On the other hand, after the flame retardant is added into the artificial board, the mechanical property of the board is influenced to a certain extent, the general rule is that a large amount of flame retardant is filled, the mechanical property is reduced, and the problem to be solved is to reduce the influence.
Disclosure of Invention
The invention is developed in view of the technical problems, aims to provide a novel layered flame-retardant technology for artificial boards, and particularly provides a layered flame-retardant artificial board and a manufacturing method thereof, which can improve flame-retardant efficiency and reduce the influence on mechanical performance.
In addition, the invention also aims to provide optimized flame retardant combination and compounding in the layered flame retardant technology so as to better improve the flame retardant efficiency and reduce the influence on the mechanical property.
1 according to an aspect of the present invention, there is provided a layered flame-retardant artificial board comprising a surface layer to which a surface layer flame retardant is applied; and a core layer to which a core layer flame retardant is applied, wherein the surface layer is bonded to the outside of the core layer, the surface layer flame retardant is a flame retardant that suppresses flame propagation and/or reduces the amount of smoke generated, and the core layer flame retardant is a char-forming flame retardant that promotes char formation.
2 in the layered flame-retardant artificial board, the structural formula of the surface layer flame retardant is as follows:
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
3 in the layered flame-retardant artificial board, the mass ratio of ammonium polyphosphate to hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000; the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
4 in the layered flame-retardant artificial board, the surface flame retardant is a compound system of DOPO and thiourea; the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
5 in the layered flame-retardant artificial board, the mass ratio of DOPO to thiourea is 2-5: 1; the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000; the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
According to another aspect of the invention, there is provided a method for manufacturing the layered flame-retardant artificial board according to the above 3, comprising the steps of preparing one or more surface layer slabs to which the surface layer flame retardant is applied; preparing one or more core layer slabs to which a core layer flame retardant is applied; and combining and molding the surface layer slab applied with the surface layer flame retardant and the core layer slab applied with the core layer flame retardant in a mode that the surface layer is arranged on the outer side and the core layer is arranged on the inner side.
The method described above further includes the steps of: the surface layer flame retardant is prepared by dissolving thiourea, acrylate and DOPO in a mass ratio of 1: 5-8: 1-6 in a solvent selected from methanol, tetrahydrofuran, acetone, ethanol, xylene and water for reaction, cooling to room temperature, filtering and washing a reaction product, and drying in vacuum to obtain the surface layer flame retardant; and preparing the core layer flame retardant, namely uniformly stirring and mixing hexaamino benzene oxygen cyclotriphosphazene and ammonium polyphosphate with the polymerization degree of more than 1000 in a mass ratio of 3-6: 1 to obtain the core layer flame retardant.
According to another aspect of the invention, there is provided a method of manufacturing the layered fire retardant artificial board according to claim 5, comprising the steps of preparing one or more surface layer slabs to which the surface layer fire retardant is applied; preparing one or more core layer slabs to which a core layer flame retardant is applied; and combining and molding the surface layer slab applied with the surface layer flame retardant and the core layer slab applied with the core layer flame retardant in a mode that the surface layer is arranged on the outer side and the core layer is arranged on the inner side.
9. The method further comprises the following steps of preparing the surface layer flame retardant, and uniformly stirring and mixing DOPO and thiourea in a mass ratio of 2-5: 1 to obtain the surface layer flame retardant; and preparing the core layer flame retardant, namely uniformly stirring and mixing hexaamino benzene oxygen cyclotriphosphazene and ammonium polyphosphate with the polymerization degree of more than 1000 according to the mass ratio of 3-6: 1 to obtain the core layer flame retardant.
10. According to another aspect of the present invention, there is provided a use of the surface layer flame retardant contained in the layered flame-retardant artificial board according to claim 2 in a flame-retardant material. Based on the layering characteristics of the artificial board and in combination with the combustion law, the invention adopts the layered flame retardant technology, adds the flame retardant for inhibiting flame spread and/or reducing smoke yield on the surface layer, and adds the char-forming flame retardant for promoting char formation on the core layer, thereby improving the flame retardant efficiency, correspondingly reducing the addition amount of the flame retardant on the whole under the condition of improving the flame retardant efficiency, and correspondingly reducing the influence on the mechanical property. In addition, the invention provides optimized flame retardant combination and compounding in the layered flame retardant technology so as to better realize the effects of improving the flame retardant efficiency and reducing the influence on the mechanical property.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic view of a layered flame-retardant artificial board according to an embodiment of the invention;
fig. 2 is a flow chart of a method for manufacturing a layered flame-retardant artificial board according to an embodiment of the invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The structure of the layered flame-retardant artificial board according to the embodiment of the present invention is described with reference to fig. 1.
The artificial board 100 is a layered structure, and includes a surface layer 101(103) and a core layer 102, the surface layer and the core layer in the present invention are divided by taking the layered structure of the artificial board as a unit, for example, a first layer or a plurality of layers of the surface layer of the artificial board is taken as the surface layer, and a middle layer (which may be a plurality of layers) is taken as the core layer, wherein the core layer 102 is sandwiched by the surface layers 101 and 103 from two sides, thereby forming the artificial board with a three-layer structure. The present invention is not limited to the three-layer structure, and in some embodiments, the layered flame-retardant wood-based panel may be a two-layer structure including only one surface layer and a core layer under the surface layer. As described above, the surface layer and the core layer are not limited to an integral structure, and for example, the surface layer may be a single layer or may be composed of a plurality of layers, and the surface layer is formed by the plurality of layers as a whole. Similarly, the core layer may be a single layer or a multi-layer structure. The surface layer 101 and the surface layer 103 may be made of the same material and structure, or may be different. In the actual use case, the surface layers 101 and 103 may be used as the outer side in any layer, or may be used as the outer side in some cases, and in the case of a two-layer structure having only one surface layer, the surface layer is used as the outer side and the core layer is used as the inner side, thereby ensuring the appearance, protection, and the like of the plate material in use.
Here, the surface layer and the core layer are each formed on the basis of one or more slabs of the artificial board itself, which slabs are not limited to the real name, but are included in the present application within the meaning of the constituents before the final product.
In addition, the thickness of the skin and core layers may be conventional for commercially available wood-based panels, or may be custom made. Where the skin or core layer is a multilayer composition as described above, the dimensions may be the sum of the conventional dimensions of the commercially available layers, or may be tailored. The invention is not limited in this respect.
The artificial board is not particularly limited herein either. The present invention can be applied to any board, such as plywood, fiberboard, shaving board, engineered wood board, and veneer using the above board as a base material, as long as the board is made by using wood or other non-wood plants as a main raw material, separating the wood or other non-wood plants into various unit materials by certain processing, and then applying an adhesive and other additives to glue the unit materials.
When the artificial board is a veneer, the "surface layer" may be the veneer layer itself of the veneer, or may be a surface layer composed of the veneer layer and a part of the base layer (e.g., a surface layer of the base layer).
The invention is applied to artificial boards, so that different flame retardant treatments are carried out on different layers by utilizing the layered structure of the artificial boards, thereby overcoming the technical obstacle that the layered flame retardant treatment of the surface layer and the core layer cannot be carried out or is difficult to be carried out on an inseparable board.
An embodiment of the flame retardant treatment of the artificial board will be described below.
In the artificial board 100, a flame retardant (hereinafter referred to as a surface layer flame retardant) for suppressing flame spread and/or reducing smoke generation is applied to the surface layers 101 and 103, and a char-forming flame retardant (hereinafter referred to as a core layer flame retardant) for promoting char formation is applied to the core layer 102.
The surface layer flame retardant is not limited herein as long as it is suitable for suppressing flame spread and/or reducing smoke yield, and for example, phosphaphenanthrys having a high content of phosphorus and nitrogen have a high flame retardant efficiency in gas phase flame retardation, and can suppress flame spread to a certain extent, and at the same time, flame retardant elements such as sulfur and nitrogen are introduced during the reaction to further improve the flame retardant efficiency. Specifically, for example, 10- (2, 5-dihydroxy) -10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-HQ) is used. Further, non-phosphaphenanthrene flame retardants such as 2,4,8, 10-tetraoxa-39 diphosphaspiro [5.5] undecane-39 dioxo-3, 9 disubstituted hydroxyethyl acrylate and aluminum hydroxide can be exemplified. The core layer flame retardant can be applicable to any char-forming flame retardant which promotes char formation, and is not limited herein, for example, hexaamino phenoxy cyclotriphosphazene is a flame retardant with high phosphorus and nitrogen content, and the phosphorus and nitrogen compound exerts a phosphorus and nitrogen synergistic effect in the flame retardant process, so that the flame retardant has a good char-forming effect; further, hexa (3-methyl-4-hydroxybenzene) cyclotriphosphazene and 2-hydroxy-4, 6-hydroxyethyl diacrylate-1, 3, 5-triazine ring can be exemplified. In addition, for example, the ammonium polyphosphate is added to catalyze the carbonization of hexaamino phenoxy cyclotriphosphazene by generating an acid source in the combustion process, so that the quality of a carbon layer is improved.
The application of the flame retardant may be performed, for example, by dipping, painting, or pressing after blending with the artificial board material, without limitation. Specifically, it can be appropriately selected according to the characteristics of the flame retardant to be used. For example, the flame retardant dissolved in water is pressed after being blended with the artificial board material, but not dipped and brushed, and the flame retardant not dissolved in water can be dipped, brushed or pressed after being blended with the flame retardant. In addition, when the pressing mode after blending with the artificial board material is adopted, for example, the flame retardant may be mixed with the wood material of the artificial board, may also be mixed with the adhesive in the artificial board, and may also be mixed with the wood material and the adhesive at the same time, which is not limited herein.
Next, the flame retardant mechanism of the layered flame retardant artificial board will be explained.
According to the layered flame-retardant process provided by the embodiment of the invention, the artificial board is subjected to layered flame-retardant treatment by utilizing the layered structure and the combustion rule of the artificial board material, in the combustion process of the layered flame-retardant artificial board obtained in the way, fire mostly occurs on the surface layer 101, the combustion process of the surface layer is to reach the ignition point → open fire → flame spread, as shown in figure 1, in the XYZ coordinate, the origin represents one ignition point, the XY direction represents the flame-retardant direction of the surface layer, namely the flame spread direction is inhibited, when flame spread occurs, the flame-retardant property of the ignition point is invalid, meanwhile, when fire occurs, the temperature rises, the core layer flame retardant of the core layer 102 acts, a heat-insulating and oxygen-insulating compact carbon layer is formed in the heat transfer process, as shown in the XZ/YZ direction in the figure, namely the flame-retardant direction of the core layer is promoted to form, when the surface layer is burnt out at the ignition point, the flame retardant effect is completely continued by the core layer. The layered flame retardant process has the advantages that the special treatment is carried out on the surface layer and the core layer, the combustion rule is fully utilized, the flame retardant efficiency is improved especially for the flame retardant characteristics of the multilayer board, the addition amount of the flame retardant can be reduced on the whole, and the influence on the mechanical property is small.
Although the effect of improving the flame-retardant efficiency and reducing the influence of mechanical properties can be obtained without particularly limiting the surface layer flame retardant and the core layer flame retardant in the above examples, the present applicant has made intensive studies on specific examples of the surface layer flame retardant and the core layer flame retardant to obtain more preferable examples.
In this more preferred embodiment, the skin layer flame retardant and the core layer flame retardant are combined in a specific manner, i.e. the following flame retardants are applied to the skin layer and the core layer, respectively:
combination example 1
Applying a surface layer flame retardant SurFR1, which is N, N' -dithiocarbonyl DOPO propionamide, to the surface layer, the structural formula being:
and applying a core layer flame retardant CenFR to the core layer, wherein the core layer flame retardant CenFR is a compound system of a flame retardant CenFRa and a flame retardant CenFRb, the flame retardant CenFRa is ammonium polyphosphate, and the flame retardant CenFRb is hexaamino phenoxy cyclotriphosphazene.
Combination example 2
Applying a surface layer flame retardant SurFR2 to the surface layer, the surface layer flame retardant SurFR2 being a compounded system of the flame retardant SurFR2a and the flame retardant SurFR2b, wherein the flame retardant SurFR2a is DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and the flame retardant SurFR2b is thiourea;
and applying a core layer flame retardant CenFR to the core layer, wherein the core layer flame retardant CenFR is a compound system of a flame retardant CenFRa and a flame retardant CenFRb, the flame retardant CenFRa is ammonium polyphosphate, and the flame retardant CenFRb is hexaamino phenoxy cyclotriphosphazene.
In the combustion of the artificial boards based on the above combination examples 1 and 2, a synergistic effect between the flame retardants occurs. Firstly, the surface layer flame retardant is mixed with the surface layer flame retardant in a contact area of the surface layer flame retardant and the core layer flame retardant in a combustion process, a gas phase flame retardant mechanism and a condensed phase flame retardant mechanism of the core layer flame retardant act together in the combustion process in the thermal degradation and combustion processes, the gas phase can capture combustion free radicals and generate inert gas components, and the condensed phase can promote carbon formation; secondly, the ammonium polyphosphate and the phosphazenes are compounded in the core surface layer flame-retardant system, the addition of the ammonium polyphosphate is beneficial to the carbonization of the phosphazenes in the combustion process, and the synergistic effect of the ammonium polyphosphate and the phosphazenes is also beneficial to the carbonization of the matrix. Under the synergistic effect, the efficiency of the flame retardant is higher, so that the combination of the flame retardant is superior to any collocation of common flame retardants, and simultaneously, the total addition of the whole flame retardant can be further reduced due to the further improvement of the flame retardant efficiency, so that the influence on the mechanical property is reduced.
Preferably, in the above-mentioned combination example 1,
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
Preferably, in the above-mentioned combination example 2,
the mass ratio of DOPO to thiourea is 2-5: 1;
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
In combination examples 1 and 2, regarding the selection of the mass ratio of the flame retardant CenFRa and the flame retardant CenFRb, the excessive CenFRb has a relatively high char formation amount due to the large molecular weight of the CenFRb, and the excessive addition of the CenFRa can cause the premature degradation of the CenFRb, so that the mass ratio of the flame retardant CenFRb, namely the hexaamino phenoxy cyclotriphosphazene, is selected to be 1: 3-6 in consideration of the excessive CenFRb, namely the cost.
In combination examples 1 and 2, regarding the selection of the flame retardant CenFRa, i.e., the polymerization degree of ammonium polyphosphate, taking into account the water resistance, low moisture absorption rate, and thermal stability during combustion of ammonium polyphosphate having a polymerization degree of 1000 or more, ammonium polyphosphate having a polymerization degree of 1000 or more was selected, and in addition, ammonium polyphosphate having a polymerization degree of 1000 or more had better compatibility with cenfrab, both of which could better exert a flame retardant synergistic effect, and ammonium polyphosphate having a polymerization degree of 1000 or more also had a better accelerating effect on char formation, and thus char formation efficiency was better improved.
In the combination example 2, as for the selection of the mass ratio of the flame retardant SurFR2a to the flame retardant SurFR2b, a large amount of free radicals for capturing flame propagation is needed in the process of inhibiting flame propagation of the surface layer, while excessive addition of DOPO can ensure the release of the free radicals and control the continuous progress of a combustion reaction chain, while the SurFR2b achieves the purpose of flame retardance in a gas phase through the auxiliary inert gas release dilution effect, excessive addition ratio is not needed, and the mass ratio is selected to be 2-5: 1 in consideration of cost.
In the combination examples 1 and 2, regarding the selection of the mass ratio of the surface layer flame retardant to the core layer flame retardant, considering the actual combustion process of the material, the surface layer material directly contacts with a fire source, the excessive addition of the flame retardant in the surface layer material inhibits the spreading of flame in the plane direction of the plate to the maximum extent, in addition, the excessive addition ensures that the core layer material does not contact with open fire but can quickly carbonize the core layer material added with the core layer flame retardant through heat conduction, the possibility of combustion is prevented, in addition, considering that the core layer material bears important mechanical indexes such as the internal bonding strength of the material, the excessive addition is not suitable, and the mass ratio is 2-4: 1.
By the preferable limitation, namely, the mass ratio of DOPO and thiourea is 2-5: 1, the mass ratio of ammonium polyphosphate to hexaamino phenoxy cyclotriphosphazene is 1: 3-6, the polymerization degree of ammonium polyphosphate is more than 1000, and the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1, in such a value range, referring to the experimental examples and comparative examples shown in tables 1 and 2 below, the obtained layered flame retardant artificial board can be suitable for the Bl-B standard in GB8624-2012, and is specifically described in the manufacturing example of the particle board below.
In view of the flame retardants that the applicant has intensely developed in the above-mentioned combination examples 1 and 2, the applicant also proposed the following corresponding preparation methods:
preparation method of 1 surface layer flame retardant SurFR1
1) Dissolving thiourea, acrylic ester and DOPO in a solvent, and reacting at the temperature of 70-95 ℃ for 1-10 h;
2) and then cooling to room temperature, filtering and washing a reaction product, and drying in vacuum at the temperature of 70-90 ℃ to obtain the flame retardant surface layer SurFRN, N' -dithiocarbonyl DOPO propionamide.
In order to obtain a higher content of surface layer flame retardant in the preparation process, the mass ratio of the thiourea to the acrylate to the DOPO is preferably 1: 5-8: 1-6. The solvent is selected from one of methanol, tetrahydrofuran, acetone, ethanol, xylene and water.
Regarding the mass ratio of 1: 5-8: 1-6, the applicant has conducted experiments, and the values of 1:5:1, 1:8:1, 1:5:6, 1:8:6, 1:6:5 and 1:7:3 are respectively obtained, so that products with high relative purity are obtained.
Preparation method of 2-surface layer flame retardant SurFR2
And uniformly stirring and mixing the DOPO and the thiourea at a high speed to obtain the surface layer flame retardant. Preferably, the DOPO and the thiourea are uniformly mixed by high-speed stirring in a mode that the mass ratio of the DOPO to the thiourea is 2-5: 1.
Preparation method of 3-core layer flame retardant CenFR
And uniformly stirring and mixing ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene at a high speed to obtain the core layer flame retardant. Preferably, the ammonium polyphosphate and the hexaamino phenoxy cyclotriphosphazene are uniformly stirred and mixed at a high speed in a mode that the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6 and the polymerization degree of the ammonium polyphosphate is more than 1000.
The manufacturing method will also be referred to in the following description of the overall manufacturing method of the artificial board.
Next, a method for manufacturing the layered flame-retardant artificial board according to the above embodiment of the present invention will be described.
FIG. 2 is a flow chart showing a method for manufacturing a layered flame-retardant artificial board. In this example, first in step S11, a surface layer blank to which a surface layer flame retardant is applied is prepared; preparing a core layer slab to which a core layer flame retardant is applied in step S12; in step S13, the surface layer blank and the core layer blank are subjected to joint molding. The surface layer slab and the core layer slab can be one or more, in the process of combining and forming, one or more surface layer slabs forming the surface layer and one or more core layer slabs forming the core layer can be combined and formed to form the surface layer and the core layer, and then the surface layer and the core layer are combined, but more preferably, one or more surface layer slabs forming the surface layer and one or more core layer slabs forming the core layer are combined and formed together to directly form the layered flame-retardant artificial board comprising the surface layer and the core layer. In step S13, two surface layer blanks may be joined to the core layer blank from the front and rear sides to form a three-layer artificial board structure, or only one surface layer blank may be joined to the core layer blank to form a two-layer artificial board structure. In addition, it should be understood that although the processes S11 and S12 are shown as processes performed before and after in the flowchart of fig. 2, the two processes may be actually performed in parallel, and it is also possible to perform the process S12 before and the process S11 after. The invention is not limited in this respect.
In the concrete surface layer and core layer plate blank preparation process and artificial board forming process, according to the different plates for manufacturing the plate material, different procedures of cutting, drying, mixing, sizing, flame retardant adding, paving, pressing and the like can be adopted, and the combination and sequence of the concrete steps and the selection of the concrete materials are not limited. For example, in some embodiments, the raw material may be cut, then the flame retardant may be dipped, painted, and then dried, or the flame retardant may be dipped, painted, and dried before the cutting process. For example, in some embodiments, the raw material such as particles may be mixed with the flame retardant, and then the mixture is applied with glue, and then the drying, spreading, pressing, and cutting processes are performed, or the flame retardant may be mixed with the adhesive, then the mixture is mixed with the raw material such as particles, and then the drying, spreading, pressing, and cutting processes are performed. In addition, in the above, part of the flame retardant may be mixed with the raw material and part may be mixed with the adhesive. Examples of the adhesive include urea resin adhesives, isocyanate adhesives, polyurethane adhesives, and phenol resin adhesives. Since the above-mentioned processes of cutting, drying, mixing, applying glue, adding flame retardant, paving, pressing, etc. are mature technologies, those skilled in the art can well understand and realize the specific processes of slab preparation of the surface layer and the core layer and the molding process of the artificial board based on the use requirements, and the specific processes are not limited.
As described above, the skilled person can specifically think of using suitable methods to manufacture the surface layer and the core layer, which are respectively applied with the corresponding flame retardant treatments, for different sheet materials, as long as the resulting surface layer and core layer are applied with flame retardants for inhibiting flame spread and/or reducing smoke yield, i.e. surface layer flame retardants, and char-forming flame retardants for promoting char formation, i.e. core layer flame retardants, and the specific methods are not limited herein. The flame retardant of the core layer may be any charring flame retardant that promotes charring, as long as the flame retardant of the surface layer is a flame retardant that inhibits flame propagation and/or reduces smoke yield, and the examples are specifically described above, and are not described herein again.
In addition, as described above, the applicant of the present invention has also preferably studied the surface layer flame retardant and the core layer flame retardant, that is, the combination of SurFR1 and CenFR as described above, and in this specific case, the manufacturing method of the above embodiment may further specifically comprise first preparing the surface layer flame retardant SurFR1 in step S11, and preparing the surface layer to which the surface layer flame retardant is applied using the surface layer flame retardant, wherein in the preparation of the surface layer flame retardant SurFR1, 1) thiourea, acrylate and DOPO are dissolved in a solvent and reacted at a temperature of 70 to 95 ℃ for 1 to 10 hours; 2) then cooling to room temperature, filtering and washing a reaction product, and drying at 70-90 ℃ in vacuum to obtain a surface layer flame retardant SurFR1, wherein the mass ratio of thiourea to acrylic ester to DOPO is preferably 1: 5-8: 1-6, and the solvent is preferably one selected from methanol, tetrahydrofuran, acetone, ethanol, xylene and water; preparing a core layer flame retardant CenFR in step S12, and using the core layer flame retardant to prepare a core layer to which the core layer flame retardant is applied, wherein in the preparation of the core layer flame retardant CenFR, ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene are uniformly stirred and mixed at a high speed to obtain the core layer flame retardant, and preferably, the ammonium polyphosphate and the hexaamino phenoxy cyclotriphosphazene are uniformly stirred and mixed at a high speed in a manner that the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6 and the polymerization degree of the ammonium polyphosphate is more than 1000; in step S13, the surface layer blank and the core layer blank are subjected to joint molding.
In addition, a combination of SurFR2 and CenFR as described above may also be employed, and in this particular case, the manufacturing method of the above embodiment may also be embodied such that first in step S11, the surface layer flame retardant SurFR2 is prepared and the surface layer to which the surface layer flame retardant is applied is prepared using the surface layer flame retardant, wherein in the preparation of the surface layer flame retardant SurFR2, DOPO and thiourea are uniformly mixed by high speed stirring to obtain the surface layer flame retardant. Preferably, the DOPO and the thiourea are uniformly stirred and mixed at a high speed in a mode that the mass ratio of the DOPO to the thiourea is 2-5: 1; preparing a core layer flame retardant CenFR in step S12, and using the core layer flame retardant to prepare a core layer to which the core layer flame retardant is applied, wherein in the preparation of the core layer flame retardant CenFR, ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene are uniformly stirred and mixed at a high speed to obtain the core layer flame retardant. Preferably, the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000, and the ammonium polyphosphate and the hexaamino phenoxy cyclotriphosphazene are uniformly stirred and mixed at a high speed to obtain a core layer flame retardant CenFR; in step S13, the surface layer blank and the core layer blank are subjected to joint molding.
In the two combined preparation methods, the mass ratio of the surface layer flame retardant to the core layer flame retardant is preferably 2-4: 1.
Through the manufacturing method for manufacturing the specific flame retardant combination, as described above, the layered flame-retardant artificial board which has higher flame-retardant efficiency and reduces the total addition of the whole flame retardant, thereby reducing the influence on the mechanical property can be manufactured.
According to the degradation data of the artificial board, based on the combustion generality of various artificial boards, in order to save space, the following takes a common artificial board particle board as an example to illustrate experimental examples and comparative examples of the invention, and the related specific manufacturing steps are also taken as specific examples for manufacturing the artificial board.
Experimental example 1
A specific experimental example 1 of the manufacturing process of the present invention is explained in detail. In this experimental example 1, a flame retardant particle board, which is specifically a two-veneer skin layer and a two-veneer (upper core, lower core) core layer structure, was produced on a continuous press production line.
First, the surface layer flame retardant SurFR1 was prepared as described above, the surface layer strands were dried with a tumble dryer, 4000kg of the surface layer flame retardant SurFR1 prepared as described above was applied to the surface layer conveying path before sizing, and the surface layer strands to which the flame retardant was applied were sized. Thus, a surface layer chip board blank to which the surface layer flame retardant SurFR1 was applied was prepared. Secondly, 500kg CenRa ammonium polyphosphate with polymerization degree of 1000 and 1500kg CenFRb hexaamino phenoxy cyclotriphosphazene are uniformly stirred and mixed at high speed to prepare a core layer flame retardant CenFR, the prepared core layer flame retardant CenFR is applied in a core layer transmission channel before sizing, and core layer wood shavings with the flame retardant applied are respectively sized. And then, the glued surface layer wood shaving board blank and the core layer wood shaving board blank are paved with the lower surface layer wood shaving firstly through an air flow paving machine, then the lower core layer wood shaving, the upper core layer wood shaving and the upper surface layer wood shaving are paved in sequence, and after the paving is finished, the board blank is pressed. The subsequent flow is the same as the production process of the common shaving board, so that the layered flame-retardant shaving board is manufactured.
As a comparison experiment, based on 500kg of fire retardant CenRa ammonium polyphosphate as a reference, the mass ratio of the fire retardant CenRa to the fire retardant CenRb is changed, the polymerization degree of the fire retardant CenRa is changed, the ratio of the sum of the fire retardant CenRa and the fire retardant CenRb to the surface layer fire retardant SurFR1 is changed, the prepared layered fire-retardant shaving board is subjected to a combustion experiment under the GB/T20284 standard to obtain a combustion growth rate index FIGRA0.2MJ (standard is less than or equal to 120W/s) and a total heat release THR600s (standard is less than or equal to 7.5MJ) of 600s, and a combustion experiment under the GB/T8626 standard for 30s obtains a flammability test within 60s, namely a flame tip height Fs (standard is less than or equal to 150mm), so as to obtain the results shown in the following table.
TABLE 1
Wherein the shaded portions are comparative examples and the blank portions are experimental examples conforming to grades B1-B.
Grade B1 is the grade of the flame-retardant materials (products) specified in GB 8624-.
According to a combustion experiment, the three indexes can not reach the standard as long as one of the three indexes is not met, so that the combination of the ammonium polyphosphate with the polymerization degree of more than 1000 and the hexaamino phenoxy cyclotriphosphazene in the mass ratio of 1: 3-6 and the combination of the surface layer flame retardant and the core layer flame retardant in the mass ratio of 2-4: 1 meet the GB standard B1-B. Wherein, the mass ratio of the surface layer flame retardant to the core layer flame retardant is preferably 3: 1.
In addition, in the above experimental example 1, the flame retardant prepared as described above was applied to the surface layer or the core layer transfer passage before the sizing, and the core layer strands to which the flame retardant was applied were respectively sized. However, the prepared flame retardant may be applied to an adhesive, and the flame retardant may be mixed with the core strands during the sizing process to apply the flame retardant to the strands. The core layer slab has a double-plate structure, but may have a single-plate structure. The number of slabs of the surface layer and the core layer is not limited. When the core layer is formed of a plurality of slabs, the core layer flame retardant may be applied to all of the slabs, or may be applied to at least a part of the slabs.
Experimental example 2
Experimental example 2 and its comparative example were different from experimental example 1 in that SurFR1 was replaced with SurFR 2. The surface layer flame retardant SurFR2 was prepared as described above, the surface layer strands were dried with a tumble dryer, 1600kg of the surface layer flame retardant SurFR fr2a prepared as described above and 800kg of the surface layer flame retardant SurFR fr2b prepared as described above were applied to the surface layer conveying path before sizing, and the surface layer strands to which the flame retardant was applied were sized. Thus, a surface layer chip board blank to which the surface layer flame retardant SurFR2 was applied was prepared. Secondly, uniformly mixing 300kg of CenRa ammonium polyphosphate with polymerization degree of 1000 and 900kg of CenFRb hexaamino phenoxy cyclotriphosphazene through high-speed stirring to prepare a core layer flame retardant CenFR, applying the prepared core layer flame retardant CenFR in a core layer transmission channel before gluing, and respectively gluing the core layer wood shavings applied with the flame retardant. And then, the glued surface layer wood shaving board blank and the core layer wood shaving board blank are paved with the lower surface layer wood shaving firstly through an air flow paving machine, then the lower core layer wood shaving, the upper core layer wood shaving and the upper surface layer wood shaving are paved in sequence, and after the paving is finished, the board blank is pressed. The subsequent flow is the same as the production process of the common shaving board, so that the layered flame-retardant shaving board is manufactured.
Also, as a comparative experiment, based on 300kg of the flame retardant CenRa ammonium polyphosphate as a reference, the mass ratio of the flame retardant CenRa to the flame retardant CenRb, and the polymerization degree of the flame retardant CenRa, and the mass ratio of the sum of the flame retardant CenRa and the flame retardant CenRb to the surface flame retardant SurFR2a and SurFR2b, and the mass ratio of the surface flame retardant SurFR2a to the surface flame retardant SurFR2b were changed, and the flame growth rate index FIGRA0.2MJ (Standard. ltoreq.120W/s) and the total heat release THR600s (Standard. ltoreq.7.5 MJ) of 600s were measured by a combustion experiment under the GB/T20284 standard for the obtained layered flame retardant particle board, and the flammability test within 60s, that is, the flame tip height Fs (Standard. ltoreq.150 mm), was measured by a combustion experiment at an ignition time of 30s under the GB/T8626 standard, to obtain the results shown in the following table.
TABLE 2
Wherein the shaded portions are comparative examples and the blank portions are experimental examples conforming to grades B1-B.
Grade B1 is the grade of the flame-retardant materials (products) specified in GB 8624-.
According to a combustion experiment, the three indexes can not reach the standard as long as one of the three indexes is not met, so that the combination of the ammonium polyphosphate with the polymerization degree of more than 1000 and the hexa-aminobenzene oxocyclotriphosphazene in the mass ratio of 1: 3-6, the combination of DOPO and thiourea in the mass ratio of 2-5: 1 and the combination of the surface layer flame retardant and the core layer flame retardant in the mass ratio of 2-4: 1 meet the GB standard of B1-B. Wherein, the mass ratio of the surface layer flame retardant to the core layer flame retardant is preferably 3: 1.
Next, an example of manufacturing plywood according to the present invention will be specifically described.
Five layers of plywood blanks were prepared. The first and fifth ply veneers are surface ply veneers and the second through fourth ply veneers are core ply veneers. 200kg of surface layerAdding 200kg of flour and a flame retardant SurFR2 into 600kg of urea-formaldehyde resin adhesive with the solid content of 60%, and performing single-side sizing on the first layer of veneer and the fifth layer of veneer by roll coating and sizing, wherein the sizing amount is 250g/m2Thereby preparing a surface plywood sheet to which the surface flame retardant SurFR2 was applied. 50kg of core layer flame retardant CenFRb and 300kg of flour are applied to 600kg of urea-formaldehyde resin adhesive with the solid content of 60 percent, and the third layer of plywood is subjected to sizing treatment by roll coating and sizing, so that the core layer plywood blank applied with the core layer flame retardant CenFR is prepared. The first to fifth layers of plywood were sequentially stacked with the glued side on the inside, cold pressed by a cold press for 30min at a pressure of 4Mpa, and then hot pressed for 10min at a pressure of 7 Mpa. Obtaining the flame-retardant plywood adopting the layered flame-retardant technology. In this example, only the third layer was subjected to sizing treatment, i.e., roll coating of an adhesive mixed with a core layer flame retardant, but the second layer and the fourth layer may be subjected to the same sizing treatment. In addition, the sizing treatment may be performed on one side or both sides.
Next, an example of manufacturing a fire retardant veneer using a five-ply plywood as a base material according to the present invention will be described.
On the basis of the step of preparing the five-ply plywood in the above example, further, the adhesive is coated on the upper surface and the lower surface again (200kg of surface flame retardant SurFR2 and 200kg of flour are applied to 600kg of urea resin adhesive with the solid content of 60%), and then the melamine impregnated bond paper is applied to the surface and is subjected to hot pressing, and the hot pressing process is the same as that of a common melamine impregnated bond paper veneer. In this example, the first and fifth layers were applied on one side with the skin flame retardant SurFR2, but the core flame retardant could be applied instead, or without any flame retardant. In this case, there is no roll-on adhesive on the outermost side of the plywood, so that the outer surface of the package is smooth.
In addition, on the basis of experimental examples 1 and 2, a procedure similar to that of the previous example in which a plywood-based flame retardant veneer was manufactured, was added to manufacture a particle board-based flame retardant veneer. Wherein the surface layer of the particle board is glued, the flame retardant is added to the adhesive, the veneer layer, such as impregnated paper or veneer, is placed on the surface and then pressed.
Thus, according to the above examples, the use of layered flame retardant technology on particle board, plywood and veneers based on particle board or plywood can be obtained. Namely:
the invention also provides a layered flame-retardant shaving board and a veneer using the shaving board as a base material:
1. a layered flame retardant particle board comprising:
one or more surface layer shaving board blanks, wherein surface layer flame retardants and adhesives are added into the surface layer shaving board blanks; and
one or more core layer shaving board blanks, wherein a core layer flame retardant and an adhesive are added into the core layer shaving board blanks,
wherein the surface layer chip board blank is combined on the outer side of the core layer chip board blank,
the surface layer flame retardant is a flame retardant for inhibiting flame spread and/or reducing smoke yield, and the core layer flame retardant is a char-forming flame retardant for promoting char formation.
Here, the "outer side" may be an upper side or a lower side of the core layer. The layered flame-retardant particle board is applied as a layered flame-retardant artificial board, wherein the surface layer wood shaving board blanks are equivalent to 101 and 103 in figure 1, and the core layer wood shaving board blanks are equivalent to 102 in figure 1.
2. The layered flame retardant particle board of claim 1, wherein,
the surface flame retardant is N, N' -dithiocarbonyl DOPO propionamide;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
3. The layered flame retardant particle board of claim 2, wherein,
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
4. The layered flame retardant particle board of claim 1, wherein,
the surface layer flame retardant is a compound system of DOPO and thiourea;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
5. The layered flame retardant particle board of claim 4, wherein,
the mass ratio of DOPO to thiourea is 2-5: 1;
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
6. A layered flame retardant veneer based on particle board, comprising:
the shaving board comprises one or more core layer shaving board blanks, wherein a core layer flame retardant and an adhesive are added into each core layer shaving board blank; and
a veneer layer, wherein a surface flame-retardant layer comprising a surface flame retardant and an adhesive is formed on the inner side of the veneer layer,
wherein the veneer layer is combined on the outer side of the shaving board in a mode that the surface flame-retardant layer faces the inner side,
the surface layer flame retardant is a flame retardant for inhibiting flame spread and/or reducing smoke yield, and the core layer flame retardant is a char-forming flame retardant for promoting char formation.
The layered flame-retardant veneer is used as a layered flame-retardant artificial board, wherein the veneer layer is equivalent to 101 in figure 1, and the core layer wood shaving board blank is equivalent to 102 in figure 1.
7. The layered flame retardant veneer of claim 6, wherein,
the particle board also has:
one or more upper surface layer shaving board blanks bonded between the core layer shaving board blank and the veneer layer, wherein the surface layer flame retardant or the core layer flame retardant is added to the upper surface layer shaving board blank;
one or more lower surface layer chip board blanks bonded to the underside of the core layer chip board blank, wherein the surface layer flame retardant is added to the lower surface layer chip board blanks.
The layered flame-retardant veneer is used as a layered flame-retardant artificial board, wherein the veneer layer is 101 in fig. 1, the upper layer wood shaving plate blank is 101 or 102 in fig. 1, the core layer wood shaving plate blank is 102 in fig. 1, and the lower layer wood shaving plate blank is 103 in fig. 1.
8. The layered flame retardant veneer of claim 6 or 7, wherein,
the surface flame retardant is N, N' -dithiocarbonyl DOPO propionamide;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
9. The layered flame retardant veneer of claim 6 or 7, wherein,
the surface layer flame retardant is a compound system of DOPO and thiourea;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
The invention also provides a layered flame-retardant plywood and a layered flame-retardant veneer using the plywood as a base material, wherein for the plywood and the veneer using the plywood as the base material, the plate blank is a veneer:
1. a layered flame retardant plywood, comprising:
one or more surface layer plywood veneers, wherein a surface layer flame-retardant layer comprising a surface layer flame retardant and an adhesive is formed on at least one of the whole outer side and the inner side of the surface layer plywood veneer except the outermost side; and
one or more core plywood veneers having a core flame retardant layer comprising a core flame retardant and an adhesive formed on at least one of all of the exterior and interior sides of the core plywood veneer,
wherein the surface plywood veneer is combined with the outer side of the core plywood veneer,
the surface layer flame retardant is a flame retardant for inhibiting flame spread and/or reducing smoke yield, and the core layer flame retardant is a char-forming flame retardant for promoting char formation.
Here, the "outer side" may be an upper side or a lower side of the core layer. The laminated flame-retardant plywood is applied as a laminated flame-retardant artificial board, wherein surface plywood veneers correspond to 101 and 103 in figure 1, and core plywood veneers correspond to 102 in figure 1.
2. The layered, fire-retardant plywood of claim 1, wherein,
the surface flame retardant is N, N' -dithiocarbonyl DOPO propionamide;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
3. The layered flame retardant plywood of claim 2, wherein,
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
4. The laminated flame-retardant plywood of claim 1, wherein,
the surface layer flame retardant is a compound system of DOPO and thiourea;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
5. The laminated flame-retardant plywood of claim 4, wherein,
the mass ratio of DOPO to thiourea is 2-5: 1;
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
6. A plywood-based layered flame retardant veneer, comprising:
plywood, the plywood including one or more core plywood veneers, a core flame retardant layer including a core flame retardant and an adhesive formed on at least one of all of the outside and inside of the core plywood veneer; and
a finishing layer, wherein a surface flame-retardant layer comprising a surface flame retardant and an adhesive is formed on one side of the finishing layer,
wherein the veneer layer is combined on the outer side of the plywood in a way that the surface flame-retardant layer faces the inner side,
the surface layer flame retardant is a flame retardant for inhibiting flame spread and/or reducing smoke yield, and the core layer flame retardant is a char-forming flame retardant for promoting char formation.
The layered flame-retardant veneer is applied as a layered flame-retardant artificial board, wherein the veneer layer is equivalent to 101 in figure 1, and the core plywood veneer is equivalent to 102 in figure 1.
7. The layered flame retardant veneer of claim 6, wherein,
the plywood further has:
one or more upper surface plywood veneers bonded between the core plywood veneer and the veneer layer, wherein at least one of the entire outer side and the inner side of the upper surface plywood veneer is provided with a surface flame retardant layer comprising a surface flame retardant and an adhesive or a core flame retardant layer comprising a core flame retardant and an adhesive;
one or more lower surface plywood veneers coupled to a lower side of the core plywood veneer, wherein a surface flame-retardant layer including a surface flame retardant and an adhesive is formed on at least one of all outer and inner sides of the lower surface plywood veneer except an outermost side.
Here, the layered fire retardant veneer is applied as a layered fire retardant artificial board, the veneer layer corresponds to 101 in fig. 1, the upper plywood veneer corresponds to 101 or 102 in fig. 1, the core plywood veneer corresponds to 102 in fig. 1, and the lower plywood veneer corresponds to 103 in fig. 1.
8. The layered flame retardant veneer of claim 6 or 7, wherein,
the surface flame retardant is N, N' -dithiocarbonyl DOPO propionamide;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
9. The layered flame retardant veneer of claim 6 or 7, wherein,
the surface layer flame retardant is a compound system of DOPO and thiourea;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A layered flame-retardant artificial board, comprising:
a skin layer to which a skin layer flame retardant is applied; and
a core layer to which a core layer flame retardant is applied,
wherein the surface layer is bonded to the outside of the core layer,
the surface layer flame retardant is a flame retardant for inhibiting flame spread and/or reducing smoke yield, and the core layer flame retardant is a char-forming flame retardant for promoting char formation.
2. The layered flame-retardant man-made board of claim 1,
the structural formula of the surface layer flame retardant is as follows:
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
3. The layered flame-retardant man-made board of claim 2,
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
4. The layered flame-retardant man-made board of claim 1,
the surface layer flame retardant is a compound system of DOPO and thiourea;
the core layer flame retardant is a compound system of ammonium polyphosphate and hexaamino phenoxy cyclotriphosphazene.
5. The layered flame-retardant man-made plate of claim 4,
the mass ratio of DOPO to thiourea is 2-5: 1;
the mass ratio of the ammonium polyphosphate to the hexaamino phenoxy cyclotriphosphazene is 1: 3-6, and the polymerization degree of the ammonium polyphosphate is more than 1000;
the mass ratio of the surface layer flame retardant to the core layer flame retardant is 2-4: 1.
6. A method for manufacturing a layered flame retardant artificial board according to claim 3, comprising the steps of:
preparing one or more skin plies to which a skin flame retardant is applied;
preparing one or more core layer slabs to which a core layer flame retardant is applied; and
the surface layer slab to which the surface layer flame retardant was applied and the core layer slab to which the core layer flame retardant was applied were combined and molded so that the surface layer was on the outside and the core layer was on the inside.
7. The method for manufacturing a layered flame-retardant artificial board according to claim 6, further comprising the steps of:
the surface layer flame retardant is prepared by dissolving thiourea, acrylate and DOPO in a mass ratio of 1: 5-8: 1-6 in a solvent selected from methanol, tetrahydrofuran, acetone, ethanol, xylene and water for reaction, cooling to room temperature, filtering and washing a reaction product, and drying in vacuum to obtain the surface layer flame retardant; and
preparing the core layer flame retardant, and uniformly mixing hexaamino benzene oxygen cyclotriphosphazene and ammonium polyphosphate with polymerization degree of more than 1000 in a mass ratio of 3-6: 1 by stirring to obtain the core layer flame retardant.
8. The method for manufacturing the layered flame-retardant artificial board according to claim 5, comprising the following steps:
preparing one or more skin plies to which a skin flame retardant is applied;
preparing one or more core layer slabs to which a core layer flame retardant is applied; and
the surface layer slab to which the surface layer flame retardant was applied and the core layer slab to which the core layer flame retardant was applied were combined and molded so that the surface layer was on the outside and the core layer was on the inside.
9. The method for manufacturing a layered flame-retardant artificial board according to claim 8, further comprising the steps of:
preparing the surface layer flame retardant, namely uniformly stirring and mixing DOPO and thiourea in a mass ratio of 2-5: 1 to obtain the surface layer flame retardant; and
preparing the core layer flame retardant, and uniformly mixing hexaamino benzene oxygen cyclotriphosphazene and ammonium polyphosphate with polymerization degree of more than 1000 in a mass ratio of 3-6: 1 by stirring to obtain the core layer flame retardant.
10. Use of the layered flame retardant artificial board according to claim 2 comprising a surface layer flame retardant in a flame retardant material.
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| CN110405898B (en) * | 2019-07-26 | 2022-01-18 | 中国林业科学研究院木材工业研究所 | Method for manufacturing flame-retardant shaving board by continuous flat pressing |
| CN114683360B (en) * | 2022-03-15 | 2022-12-06 | 德清鼎森质量技术检测中心 | Flame-retardant core-board and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63221007A (en) * | 1987-03-11 | 1988-09-14 | Ooshika Shinko Kk | Preparation of straw board |
| CN101094952A (en) * | 2005-01-07 | 2007-12-26 | 名古屋油化株式会社 | Flame-retardant fiber sheet and formed article thereof |
| CN102464880A (en) * | 2010-11-18 | 2012-05-23 | 上海杰事杰新材料(集团)股份有限公司 | Flame retardant polyurethane material as well as preparation method and application thereof |
| CN105566755A (en) * | 2015-12-31 | 2016-05-11 | 南京林业大学 | Surface layer-core layer synchronous co-extrusion flame-retardant wood-plastic composite material and manufacturing method thereof |
| CN107538584A (en) * | 2017-08-31 | 2018-01-05 | 中国林业科学研究院木材工业研究所 | A kind of synthesis of phosphonitrile class reactive flame retardant and its preparation method of fire-retardant wood-based materialses |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5401793A (en) * | 1991-03-20 | 1995-03-28 | Dainippon Ink And Chemicals, Inc. | Intumescent fire-resistant coating, fire-resistant material, and process for producing the fire-resistant material |
| JP5144007B2 (en) * | 2004-12-22 | 2013-02-13 | 古河電気工業株式会社 | Flame retardant resin composition and molded article using the same |
-
2018
- 2018-08-16 CN CN201810932183.9A patent/CN109318338B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63221007A (en) * | 1987-03-11 | 1988-09-14 | Ooshika Shinko Kk | Preparation of straw board |
| CN101094952A (en) * | 2005-01-07 | 2007-12-26 | 名古屋油化株式会社 | Flame-retardant fiber sheet and formed article thereof |
| CN102464880A (en) * | 2010-11-18 | 2012-05-23 | 上海杰事杰新材料(集团)股份有限公司 | Flame retardant polyurethane material as well as preparation method and application thereof |
| CN105566755A (en) * | 2015-12-31 | 2016-05-11 | 南京林业大学 | Surface layer-core layer synchronous co-extrusion flame-retardant wood-plastic composite material and manufacturing method thereof |
| CN107538584A (en) * | 2017-08-31 | 2018-01-05 | 中国林业科学研究院木材工业研究所 | A kind of synthesis of phosphonitrile class reactive flame retardant and its preparation method of fire-retardant wood-based materialses |
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| CN109318338A (en) | 2019-02-12 |
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