阅读说明：本技术 一种阻燃地板及其制备方法 (Flame-retardant floor and preparation method thereof ) 是由 邱晓强 于 2021-01-23 设计创作，主要内容包括：本申请涉及地板制备技术领域,尤其是一种阻燃地板及其制备方法。一种阻燃地板,包括地板主体,地板主体包括榉木底板层、桉木中板层和柞木面板层,榉木底板层、桉木中板层和柞木面板层之间采用阻燃胶水粘结,阻燃胶水由包含以下重量份的原料制成：100份水性聚氨酯胶、20～35份复配无毒阻燃剂。本申请产品具有较好的阻燃性和降低的甲醛释放量,按GB8624～2012判断本产品阻燃性能可达难燃B-1(C～s1,t1)级别,甲醛释放量低于0.03mg/m～3。本产品的制备方法为阻燃胶水的配制,榉木底板层、桉木中板层、柞木面板层之间涂胶压合得半成品地板,热处理,自然冷却,得目标成品。(The application relates to the technical field of floor preparation, in particular to a flame-retardant floor and a preparation method thereof. The utility model provides a fire-retardant floor, includes the floor main part, and the floor main part adopts fire-retardant glue to bond in the beech floor layer, the eucalyptus in sheet layer and the oak panel layer including in the beech floor layer, the eucalyptus, and fire-retardant glue is made by the raw materials that contain following parts by weight: 100 parts of waterborne polyurethane adhesive and 20-35 parts of compound non-toxic flame retardant. The product of the application has the advantages ofGood flame retardance and reduced formaldehyde emission, and the flame retardance of the product can reach flame retardant B according to the judgment of GB 8624-2012 1 (C-s 1, t1) grade, formaldehyde emission less than 0.03mg/m 3 . The preparation method of the product is the preparation of flame-retardant glue, the semi-finished floor is obtained by gluing and pressing the beech bottom plate layer, the eucalyptus middle plate layer and the oak panel layer, and the target finished product is obtained by heat treatment and natural cooling.)

1. A fire retardant floor, comprising: the anti-flaming water-based anti-flaming wood floor comprises a floor main body (1), wherein the floor main body (1) comprises a beech bottom plate layer (2), a eucalyptus middle plate layer (3) and an oak panel layer (4), and the beech bottom plate layer (2), the eucalyptus middle plate layer (3) and the oak panel layer (4) are bonded through anti-flaming glue; the flame-retardant glue is prepared from the following raw materials in parts by weight: 100 parts of waterborne polyurethane adhesive and 20-35 parts of compound non-toxic flame retardant.

2. A fire retardant flooring according to claim 1, wherein: the compound nontoxic flame retardant comprises magnesium dioxide, aluminum oxide and liquid rare earth flame retardant, wherein the mass ratio of the magnesium dioxide to the aluminum oxide to the liquid rare earth flame retardant is 1: (0.5-1.5): (0.2-0.4).

3. A fire retardant flooring according to claim 2, wherein: the flame-retardant glue is prepared from the following raw materials in parts by weight: 100 parts of water-based polyurethane adhesive, 8-10 parts of magnesium dioxide, 8-10 parts of aluminum oxide, 2-3 parts of liquid rare earth flame retardant, 4-6 parts of nano silicon dioxide and 0.5-1.0 part of multi-walled carbon nanotube (MWNT).

4. A fire retardant flooring according to claim 1, wherein: a first reinforcing mesh (5) is compounded between the beech bottom plate layer (2) and the eucalyptus middle plate layer (3), the first reinforcing mesh (5) is formed by flat weaving of warps and wefts, and the density of the warps and wefts is 20-60 pieces/10 cm; the warp and weft of the first reinforced mesh cloth (5) have the same composition; the warp of the first reinforcing mesh cloth (5) comprises a first composite wire (51), and the first composite wire (51) is formed by twisting S glass fibers and aramid fibers.

5. A fire retardant flooring according to claim 3, wherein: the warp of the first reinforced mesh cloth (5) also comprises a second composite wire (52), the second composite wire (52) is composed of chitin fibers (521) and superfine PET/SS composite phase change energy storage fibers (522), and the superfine PET/SS composite phase change energy storage fibers (522) are spirally wound around the chitin fibers (521) in the circumferential direction; the number ratio of the second composite wires (52) to the first composite wires (51) is 1: (1-3).

6. A fire retardant flooring according to claim 1, wherein: a composite reinforcing layer (6) is compounded between the eucalyptus middle plate layer (3) and the oak panel layer (4); the composite reinforcing layer (6) comprises an aerogel layer (61) and a second reinforcing mesh cloth (62), wherein the second reinforcing mesh cloth (62) is formed by plain weaving of warps and wefts, and the density of the warps and wefts is 20-60 pieces/10 cm; the warp and weft of the second reinforced mesh cloth (62) have the same composition; the warp threads of the second reinforcing mesh cloth (62) comprise third composite threads (63), and the third composite threads (63) are formed by twisting HT carbon fibers and Kevlar fibers.

7. A preparation method of the flame-retardant floor as claimed in claims 1 to 6, characterized in that: the method comprises the following steps:

step 1, preparing flame-retardant glue;

step 2, coating flame-retardant glue on the surface of the beech bottom plate layer (2), laminating the eucalyptus middle plate layer (3) on the beech bottom plate layer (2), coating the flame-retardant glue on the surface of the eucalyptus middle plate layer (3) after 5-10min of laminating operation, laminating the oak panel layer (4) on the eucalyptus middle plate layer (3), and performing laminating operation for 5-15min to obtain a semi-finished floor;

and 3, performing heat treatment at 55-70 ℃ under the protection of nitrogen, applying 10-20kg of pressure on the upper surface of the semi-finished floor in the step 2, continuing the heat treatment for 30-60min, and naturally cooling to normal temperature to obtain a target finished product.

8. The method for preparing a fire retardant floor as recited in claim 7, wherein: the operation between the step 1 and the step 2 is that the upper surface of the beech bottom plate layer (2), the upper and lower surfaces of the eucalyptus middle plate layer (3) and the lower surface of the oak panel layer (4) are all polished by 50# abrasive paper, 5% concentration sodium hydroxide solution is sprayed during polishing, and the spraying amount is 10-20ml/m²And after 20-40min, soaking for at least 4 times by using clean water for at least 10min, and drying until the water content is 5-8%.

9. The method for preparing a fire retardant floor as recited in claim 7, wherein: performing flame-retardant pretreatment on a beech bottom plate layer (2), a eucalyptus middle plate layer (3) and an oak panel layer (4), placing the wood plate in a reaction kettle, adding deionized water to submerge the top of the wood plate, heating to 80 +/-5 ℃, continuing for 20-30min, adding a flame retardant accounting for 0.5-2.0% of the mass of deionized water and acetic anhydride accounting for 2-3.0% of the mass of the deionized water, heating to 95 ℃, continuing for 12-20h, removing the flame retardant and the acetic anhydride, replacing the deionized water for soaking for 2-4h, and vacuumizing and drying to obtain the flame-retardant modified wood plate with the water content of 3-8%.

10. The method for preparing a fire retardant floor as recited in claim 9, wherein: the flame retardant is one or more of wood board flame retardant FRW, WH-1 water-based flame retardant and phosphoric acid dihydroamino-boric acid.

Technical Field

The application relates to the technical field of floor preparation, in particular to a flame-retardant floor and a preparation method thereof.

Background

The wood board is widely applied to the industries of building engineering, home decoration and furniture manufacturing. The news of property loss caused by fire disasters exist in various places every year, so that the fire protection consciousness of people is gradually improved, and people put forward higher requirements on the fire protection performance of the wood boards. In terms of the selection of the wood boards, the untreated wood boards should be reduced as much as possible, and the wood boards with flame resistance and fire resistance are preferably selected so as to avoid serious fire caused by rapid expansion of combustion after the fire source is generated. Under the trend of the industry, enterprises are required to produce floors with better flame retardance.

Good CN1259379C discloses a waterproof, heat-insulating and flame-retardant coating, which comprises auxiliary materials and base materials, and is characterized in that: the main materials comprise the following components in parts by weight: 5-16 parts of pentaerythritol, 0.2-6 parts of antimony trioxide, 0.2-6 parts of chlorinated paraffin, 2-20 parts of mica and 2-20 parts of sepiolite; the main material also comprises 1-11 parts of melamine and 0.3-7 parts of silicon powder; the main material comprises 1-18 parts of ammonium phosphate and 5-40 parts of perlite.

The above prior art solutions have the following drawbacks: antimony trioxide is an 2B class carcinogen and has certain health potential problems, although antimony trioxide can be used as an effective component for flame retardance to endow wood boards with flame retardance.

Disclosure of Invention

In order to solve the problem that the prior art has health hidden danger, the first aim at of this application is to provide a fire-retardant floor.

The first purpose of the application is realized by the following technical scheme:

the utility model provides a fire-retardant floor, includes the floor main part, and the floor main part adopts fire-retardant glue to bond in the beech floor layer, the eucalyptus in sheet layer and the oak panel layer including in the beech floor layer, the eucalyptus, and fire-retardant glue is made by the raw materials that contain following parts by weight: 100 parts of waterborne polyurethane adhesive and 20-35 parts of compound non-toxic flame retardant.

By adopting the technical scheme, the product adopts the environment-friendly flame-retardant glue prepared by compounding the waterborne polyurethane glue and the non-toxic flame retardant, the beech bottom plate layer, the eucalyptus middle plate layer and the oak panel layer are pressed and bonded together, the beech bottom plate layer is an imported beech plate, and the beech plate has good hardness, bearing performance and pressure resistanceMaking a high-quality bottom plate material; the eucalyptus middle plate layer is a eucalyptus plate which is hard in texture, has better strength and toughness at intervals and is not selected as a core layer material; the oak panel layer is an oak board, has the advantages of high specific gravity, hard texture, high strength, compact structure, smooth cutting surface, moisture resistance and wear resistance, and is a high-quality panel material, so that the product is non-toxic and environment-friendly, has better flame retardance and reduced formaldehyde release, and has flame retardance reaching flame-retardant B according to the judgment of GB 8624-2012₁The (C-s 1, t1) grade and the formaldehyde emission are superior to the national standard.

Preferably, the compound nontoxic flame retardant comprises magnesium dioxide, aluminum oxide and a liquid rare earth flame retardant, wherein the mass ratio of the magnesium dioxide to the aluminum oxide to the liquid rare earth flame retardant is 1: (0.5-1.5): (0.2-0.4).

By adopting the technical scheme, the magnesium dioxide, the aluminum oxide and the liquid rare earth flame retardant are all nontoxic and environment-friendly flame retardants, and the compounded nontoxic flame retardant formed by compounding the magnesium dioxide, the aluminum oxide and the liquid rare earth flame retardant can enable the flame retardant property of the product to reach B₁The use is safe and environment-friendly.

Preferably, the flame-retardant glue is prepared from the following raw materials in parts by weight: 100 parts of waterborne polyurethane adhesive, 8-10 parts of magnesium dioxide, 8-10 parts of aluminum oxide, 2-3 parts of liquid rare earth flame retardant, 4-6 parts of nano silicon dioxide and 0.5-1.0 part of multi-walled carbon nanotube MWNT.

By adopting the technical scheme, the nano silicon dioxide is introduced to improve the defect of water resistance of the plate layer in the eucalyptus, the nano silicon dioxide can be combined with polyurethane chain links in polyurethane glue to form a silica structure with a network structure, the whole hydrophobicity is endowed, so that the flame-retardant glue is combined with the plate more tightly, the glue can flow, the curing speed is accelerated, the bonding effect is improved, and the sealing property and the seepage resistance of the product are improved; the introduction of the MWNT mainly enhances the strength and toughness of an adhesive film formed by the flame-retardant glue, the integral impact strength of the product is improved, the large specific surface area, the surface mesoporous structure, the super-strong adsorption capacity and the singular physical and chemical properties of the nano-silica are improved, so that the MWNT is adsorbed by the nano-silica to improve the integral dispersibility, and the problems of easy agglomeration and large dispersion difficulty of the MWNT are solved.

Preferably, a first reinforcing mesh cloth is compounded between the beech bottom plate layer and the eucalyptus middle plate layer, the first reinforcing mesh cloth is formed by plain weaving of warps and wefts, and the density of the warps and wefts is 20-60 pieces/10 cm; the warp and weft of the first reinforced mesh cloth have the same composition; the warp of the first reinforcing mesh cloth comprises a first composite wire, and the first composite wire is formed by twisting S glass fibers and aramid fibers.

Through adopting above-mentioned technical scheme, S glass fiber and aramid fiber all are better fire-retardant material, and S glass fiber 'S fragility is great adopts aramid fiber to modify, has obtained strong and tough and fire resistance good first reinforcing screen cloth, and toughness, the shock resistance that can improve this application product between the ply in zelkova floor layer, the eucalyptus of first reinforcing screen cloth complex can promote this application product' S bearing upper limit.

Preferably, the warp of the first reinforced mesh cloth further comprises a second composite wire, the second composite wire is composed of chitin fibers and superfine PET/SS composite phase change energy storage fibers, and the superfine PET/SS composite phase change energy storage fibers are spirally wound around the chitin fibers in the circumferential direction; the number ratio of the second composite wires to the first composite wires is 1: (1-3).

By adopting the technical scheme, the chitin fiber improves the bonding environment between the beech bottom plate layer and the eucalyptus middle plate layer, mildew is not easy to appear, and the bonding durability of the glue layer is ensured; the superfine PET/SS composite phase change energy storage fiber has the function of bidirectional temperature regulation, so that the heat retention property and the environmental protection property of the fiber are better.

Preferably, a composite reinforcing layer is compounded between the eucalyptus middle plate layer and the oak panel layer; the composite reinforcing layer comprises an aerogel layer and a second reinforcing mesh fabric, the second reinforcing mesh fabric is formed by plain weaving of warps and wefts, and the density of the warps and wefts is 20-60 pieces/10 cm; the warp and weft of the second reinforced mesh cloth have the same composition; the warp threads of the second reinforcing mesh cloth comprise third composite threads, and the third composite threads are formed by twisting HT carbon fibers and Kevlar fibers.

By adopting the technical scheme, the aerogel layer endows the wood board with better heat-insulating property, the flame retardance of the wood board can be improved, and meanwhile, the damping impact property of the wood board can also be improved by the aerogel; the second composite line that HT carbon fibre and Kevlar fibre constitute has given the better shock resistance, toughness and fire resistance of second reinforcing screen cloth, guarantees the fire resistance of this application product and improves simultaneously in the eucalyptus sheet layer and the oak panel layer connection toughness and shock resistance.

A second object of the present application is to provide a method for preparing a flame retardant flooring.

In order to achieve the second object, the invention provides the following technical scheme:

a preparation method of a flame-retardant floor comprises the following steps:

step 1, preparing flame-retardant glue;

step 2, coating flame-retardant glue on the surface of the beech bottom plate layer, laminating the eucalyptus middle plate layer on the beech bottom plate layer, coating the flame-retardant glue on the surface of the eucalyptus middle plate layer after 5-10min of laminating operation, laminating the oak panel layer on the eucalyptus middle plate layer, and performing laminating operation for 5-15min to obtain a semi-finished floor;

and 3, performing heat treatment at 55-70 ℃ under the protection of nitrogen, applying 10-20kg of pressure on the upper surface of the semi-finished floor in the step 2, continuing the heat treatment for 30-60min, and naturally cooling to normal temperature to obtain a target finished product.

By adopting the technical scheme, the preparation method is simple, the implementation performance is strong, the cost of used equipment is relatively low, and batch scale production is facilitated.

Preferably, the following operations are carried out between the step 1 and the step 2, wherein the upper surface of the beech bottom plate layer, the upper surface and the lower surface of the eucalyptus middle plate layer and the lower surface of the oak panel layer are polished by 50# sand paper, 5% sodium hydroxide solution is sprayed for polishing, and the spraying amount is 10-20ml/m²Soaking with clear water for at least 4 times after 20-40minDrying for 10min until the water content is 5-8%.

By adopting the technical scheme, the bonding strength and the bonding temperature of the beech bottom plate layer, the eucalyptus middle plate layer and the oak panel layer can be further improved, the surface layer interface acting force of the plate is changed by adopting the methods of sanding and surface alkali treatment, the bonding with glue is more facilitated, and the problem that the oak panel layer is not easy to glue is solved.

Preferably, the following operations are carried out between the step 1 and the step 2, namely, carrying out flame-retardant pretreatment on a beech bottom board layer, a eucalyptus middle board layer and an oak panel layer, placing the wood board in a reaction kettle, adding deionized water to submerge the top of the wood board, heating to 80 +/-5 ℃, continuing for 20-30min, adding a flame retardant accounting for 0.5-2.0% of the mass of deionized water and acetic anhydride accounting for 2-3.0% of the mass of the deionized water, heating to 95 ℃, continuing for 12-20h, removing the flame retardant and the acetic anhydride, replacing the deionized water for soaking for 2-4h, and carrying out vacuum drying to obtain the flame-retardant modified wood board with the water content of 3-8%.

Through adopting above-mentioned technical scheme, carry out fire-retardant treatment to plate layer and oak panel layer in beech floor layer, the eucalyptus, can further guarantee the flame retardant efficiency of this application, and the reducible waste gas of the used fire retardant of this application and wastewater discharge, more environmental protection safety.

Preferably, the flame retardant is one or more of a wood board flame retardant FRW, a WH-1 water-based flame retardant and ammonium dihydrogen phosphate boric acid.

Through adopting above-mentioned technical scheme, adopt water-based type fire retardant, can reduce the degree of difficulty of plank flame retardant treatment, reduce the discharge of waste gas, comparatively environmental protection and energy saving can play simultaneously and guarantee that the plank through water-based type fire retardant has the fire resistance effect.

In summary, the present application has the following advantages:

1. the product is prepared from the environment-friendly flame-retardant glue which is self-developed, is nontoxic and environment-friendly, has better flame retardance and reduced formaldehyde release amount, and can reach the flame-retardant B according to GB 8624-2012 for judging the flame retardant property of the product₁(C-s 1, t1) grade, formaldehyde emission less than 0.03mg/m³。

2. The method is simple, strong in implementability, low in cost of used equipment and convenient for mass production.

3. This application adopts water-based type fire retardant to guarantee the plank fire resistance and makes the comparatively environmental protection of preparation operation energy-conservation simultaneously.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 in the present application.

FIG. 2 is a schematic structural view of a first reinforcing web according to example 1 of the present application.

Fig. 3 is a schematic structural view of a second composite wire in example 1 of the present application.

FIG. 4 is a schematic structural view of a second reinforcing web according to example 1 of the present application.

In the figure, 1, a floor main body; 2. a beech floor layer; 3. a eucalyptus middle plate layer; 4. an oak panel layer; 5. A first reinforcing mesh; 51. a first composite wire; 52. a second composite wire; 521. chitin fiber; 522. superfine PET/SS composite phase change energy storage fibers; 6. a composite reinforcement layer; 61. an aerogel layer; 62. a second reinforcing mesh; 63. and a third composite wire.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples.

Raw materials

Preparation example

Preparation example 1

Preparing a first reinforcing mesh fabric: firstly twisting S glass fiber and aramid fiber into a first composite wire, spirally winding superfine PET/SS composite phase change energy storage fiber by chitin fiber in the circumferential direction to form a second composite wire, taking the first composite wire and the second composite wire as warp yarns, taking the first composite wire and the second composite wire as weft yarns, and weaving into a first reinforced mesh cloth with warp and weft densities of 40 pieces/10 cm by a flat weaving machine.

Preparation example 2

Preparing a second reinforcing mesh fabric: firstly, twisting HT carbon fibers and Kevlar fibers into a third composite wire, taking the third composite wire as warp and weft, and weaving into a second reinforced mesh cloth with the warp and weft density of 40 pieces/10 cm by a flat knitting machine.

Preparation example 3

Preparing flame-retardant glue: weighing 1000g of aqueous polyurethane adhesive, 85g of magnesium dioxide, 89g of aluminum dioxide, 22g of liquid rare earth flame retardant, 42g of nano-silica and 5g of multi-walled carbon nanotube MWNT, firstly controlling the stirring speed of 300 revolutions per minute in an aqueous polyurethane adhesive reaction kettle, sequentially adding the magnesium dioxide, the aluminum dioxide and the liquid rare earth flame retardant, controlling the stirring speed to 500 revolutions per minute, stirring for 3 minutes, adding the nano-silica and the multi-walled carbon nanotube MWNT, increasing the stirring speed to 800 revolutions per minute, stirring for 2 minutes, and stirring for 10 minutes until the rotating speed reaches 300 revolutions per minute to obtain the flame-retardant glue.

Preparation example 4

Preparing flame-retardant glue: weighing 1000g of aqueous polyurethane adhesive, 85g of magnesium dioxide, 89g of aluminum dioxide, 22g of liquid rare earth flame retardant and 42g of nano silicon dioxide, firstly controlling the stirring speed of 300 revolutions per minute in an aqueous polyurethane adhesive reaction kettle, sequentially adding the magnesium dioxide, the aluminum dioxide and the liquid rare earth flame retardant, controlling the stirring speed of 500 revolutions per minute, stirring for 3 minutes, adding the multi-walled carbon nanotube MWNT, increasing the stirring speed to 800 revolutions per minute, stirring for 2 minutes, and stirring for 10 minutes until the rotating speed reaches 300 revolutions per minute to obtain the flame-retardant glue.

Preparation example 5

Preparing flame-retardant glue: weighing 1000g of aqueous polyurethane adhesive, 85g of magnesium dioxide, 89g of aluminum dioxide, 22g of liquid rare earth flame retardant and 5g of multi-walled carbon nanotube (MWNT), firstly controlling the stirring speed of 300 revolutions per minute in an aqueous polyurethane adhesive reaction kettle, sequentially adding the magnesium dioxide, the aluminum dioxide and the liquid rare earth flame retardant, controlling the stirring speed of 500 revolutions per minute, stirring for 3 minutes, adding the multi-walled carbon nanotube (MWNT), increasing the stirring speed to 800 revolutions per minute, stirring for 2 minutes, and stirring for 10 minutes until the rotating speed reaches 300 revolutions per minute to obtain the flame-retardant glue.

Preparation example 6

Preparing flame-retardant glue: weighing 1000g of waterborne polyurethane adhesive, 85g of magnesium dioxide, 89g of aluminum dioxide and 22g of liquid rare earth flame retardant, firstly controlling the stirring speed to be 300 revolutions per minute in a waterborne polyurethane adhesive reaction kettle, sequentially adding the magnesium dioxide, the aluminum dioxide and the liquid rare earth flame retardant, controlling the stirring speed to be 500 revolutions per minute, and stirring for 10 minutes to obtain the flame-retardant adhesive.

Preparation example 7

Preparing flame-retardant glue: weighing 1000g of waterborne polyurethane adhesive, 85g of magnesium dioxide and 89g of aluminum dioxide, controlling the stirring speed to be 300 revolutions per minute in a waterborne polyurethane adhesive reaction kettle, sequentially adding the magnesium dioxide and the aluminum dioxide, controlling the stirring speed to be 500 revolutions per minute, and stirring for 10 minutes to obtain the flame-retardant adhesive.

Examples

Example 1

Referring to fig. 1, the flame retardant floor and the preparation method thereof disclosed by the application comprise a floor main body 1, wherein the floor main body 1 is composed of a beech bottom plate layer 2, a eucalyptus middle plate layer 3, an oak panel layer 4, flame retardant glue, a first reinforcing mesh 5 and a composite reinforcing layer 6. The first reinforcing mesh cloth 5 is bonded between the beech bottom plate layer 2 and the eucalyptus middle plate layer 3 through flame-retardant glue. The composite reinforcing layer 6 comprises an aerogel layer 61 and a second reinforcing mesh cloth 62, wherein the aerogel layer 61 is nano silicon dioxide aerogel felt cloth, and the nano silicon dioxide aerogel felt cloth is bonded on the lower surface of the oak panel layer 4 through flame-retardant glue. The upper surface of the second reinforcing mesh cloth 62 is bonded to the lower surface of the nano silica aerogel felt cloth through flame-retardant glue, and the lower surface of the second reinforcing mesh cloth 62 is bonded to the upper surface of the eucalyptus middle plate layer 3 through flame-retardant glue.

Referring to FIG. 2, the first reinforcing mesh 5 is flat woven with warp and weft threads, and the warp and weft density is 40 threads/10 cm. The warp and weft compositions of the first reinforcing mesh 5 are the same. Taking the warp of the first reinforcing mesh cloth 5 as an example, the warp of the first reinforcing mesh cloth 5 includes a first composite wire 51 and a second composite wire 52 arranged along the warp, and the number ratio of the second composite wire 52 to the first composite wire 51 is 1: 2, two first composite wires 51 are arranged between two adjacent second composite wires 52. The first composite yarn 51 is formed by twisting S glass fibers and aramid fibers 1414.

Referring to fig. 3, the second composite wire 52 is composed of a chitin fiber 521 and an ultra-fine PET/SS composite phase change energy storage fiber 522, and the ultra-fine PET/SS composite phase change energy storage fiber 522 is spirally wound around the chitin fiber 521. The superfine PET/SS composite phase change energy storage fiber 522 is prepared by taking stearic acid stearyl alcohol ester (SS) compounded by stearic acid and stearyl alcohol as a phase change material and performing electrostatic spinning.

Referring to FIG. 4, the second reinforcing mesh 62 is flat woven with warp and weft yarns having a warp and weft density of 40 yarns/10 cm. The warp and weft compositions of the second reinforcing scrim 62 are the same. As an example of the warp threads of the second reinforcing mesh 62, the warp threads of the second reinforcing mesh 62 are composed of second composite threads 63 arranged along the warp thread direction, and the second composite threads 63 are formed by twisting HT carbon fibers and kevlar fibers.

A preparation method of a flame-retardant floor comprises the following steps:

step 1, selecting the flame-retardant glue in preparation example 3, and maintaining the temperature of the glue at 20 ℃;

step 2, polishing the upper surface of the beech bottom plate layer 2, the upper and lower surfaces of the eucalyptus middle plate layer 3 and the lower surface of the oak panel layer 4 by using No. 50 abrasive paper, spraying a sodium hydroxide solution with the concentration of 5%, wherein the spraying amount is 15.0ml/m²Waiting for 30min, soaking for 4 times with clear water, each time for 10min, and oven drying for 8h to obtain beech bottom plate, eucalyptus middle plate, and oak panel with water content of 5-8%;

step 3, performing flame retardant pretreatment, namely respectively placing a beech bottom plate, a eucalyptus middle plate and a oak panel in different reaction kettles, adding deionized water until the tops of the wood plates are submerged, heating to 80 +/-5 ℃, continuing for 30min, adding a wood flame retardant FRW accounting for 1.2% of the mass of deionized water, a WH-1 water-based flame retardant accounting for 0.3% of the mass of the deionized water, and acetic anhydride accounting for 3.0% of the mass of the deionized water, heating to 95 ℃, continuing for 18h, removing the flame retardant and the acetic anhydride, changing the deionized water, carrying out soaking for 1h at the temperature of 45 ℃, fully carrying out water changing soaking operation for 3 times, and carrying out vacuum drying for 8h to obtain a flame retardant beech bottom plate, a flame retardant eucalyptus middle plate and a flame retardant oak panel with the water content of 3-8% for later use; step 4, coating the flame-retardant glue in preparation example 3 on the surface of a flame-retardant beech bottom plate, placing a first reinforcing net in preparation example 1, coating the flame-retardant glue in preparation example 3 on the surface of flame-retardant eucalyptus, pressing the first reinforcing net between a flame-retardant eucalyptus middle plate and the flame-retardant beech bottom plate, after 10min of pressing operation, coating the flame-retardant glue in preparation example 3 on the surface of the flame-retardant eucalyptus middle plate, placing a second reinforcing net in preparation example 2 on the flame-retardant eucalyptus middle plate, coating the flame-retardant glue in preparation example 3 on the lower surface of the nano-silica aerogel, bonding the nano-silica aerogel with the second reinforcing net, bonding the nano-silica aerogel with a flame-retardant oak panel, and performing 15min of pressing operation to obtain a semi-finished floor;

and 5, performing heat treatment at 65 ℃ under the protection of nitrogen, applying 120kg of pressure on the upper surface of the semi-finished floor in the step 4, continuing the heat treatment for 60min, and naturally cooling to normal temperature to obtain a target finished product.

Example 2

Example 2 differs from example 1 in that: the flame-retardant glue was replaced with the flame-retardant glue in preparation example 4.

Example 3

Example 3 differs from example 1 in that: the flame-retardant glue was replaced with the flame-retardant glue in preparation example 5.

Example 4

Example 4 differs from example 1 in that: the flame-retardant glue was replaced with the flame-retardant glue of preparation example 6.

Example 5

Example 5 differs from example 1 in that: the flame-retardant glue was replaced with the flame-retardant glue of preparation example 7.

Example 6

Example 6 differs from example 1 in that: step 2 operation was not performed.

Example 7

Example 7 differs from example 1 in that: step 3 operation was not performed.

Example 8

Example 8 differs from example 1 in that: step 2 and step 3 operations were not performed.

Example 9

Example 9 differs from example 1 in that: step 6, coating the flame-retardant glue in the preparation example 3 on the outer wall of the floor main body 1, polishing the outer wall of the floor main body 1 by 800# abrasive paper, coating the flame-retardant glue in the preparation example 3 on the outer wall of the floor main body 1, and polishing the outer wall of the floor main body 1 by 800# abrasive paper.

Example 10

Example 10 differs from example 9 in that: step 3 operation was not performed.

Comparative example

Comparative example 1

Comparative example 1 differs from example 1 in that: step 3 was not performed and the flame retardant glue was replaced with hot melt glue (henkelelchnomelttpa 6208 hot melt glue, han germany).

Comparative example 2

Comparative example 2 differs from example 1 in that: the first reinforcing mesh 5 and the composite reinforcing layer 6 are not compounded in the floor main body 1.

Comparative example 3

Comparative example 3 differs from example 9 in that: the flame-retardant glue is replaced by hot melt adhesive (HENKEL TECHNOLIPTPA 6208 hot melt adhesive in Hegao, Germany).

Performance test

1. And testing the flame retardancy of the products of examples 1-10 and comparative examples 1-3 according to the combustion performance grading of GB 8624-2012 building materials and products.

2. The flame retardancy of the products of examples 1-10 and comparative examples 1-3 was tested according to GB18580-2001 limit on formaldehyde emission in artificial boards and articles made therefrom for interior decoration and finishing materials.

3. The products of examples 1-10 and comparative examples 1-3 were tested for flexural strength according to the GBT1936.1-2009 wood flexural strength test method. The bending strength of the sample with the water content of W was calculated to 0.1MPa according to the formula. Sigma_bw＝3P_maxl/2b*h²In the formula, σ_bwFlexural strength in megapascals (MPa) for a sample with a water content W; p_max-breaking load in cattle (N); l-the span between two supports, in millimeters (mm); b-sample width in millimeters (mm); h-specimen height in millimeters (mm).

Detection method

FIG. 1 test parameters for examples 1-10 and comparative examples 1-3

As can be seen from Table 1, the products of examples 1-6 and 9 of the present application have good flame retardancy, which can reach flame retardancy B₁(C-s 1, t1) grade, formaldehyde emission less than 0.03mg/m³。

As can be seen from Table 1, the flame retardancy of the products of examples 1-6 and 9 of the present application is better than that of the products of examples 6 and 7, and therefore, the flame retardancy of wood can be further improved by pretreating the wood with a flame retardant.

As can be seen from Table 1, the flame retardancy of example 10 of the present application can reach flame retardancy B₁Therefore, the flame-retardant glue has better flame retardant property, the operation of adopting a flame retardant to pretreat wood can be omitted, and the production cost is reduced.

As can be seen from Table 1, the bending strengths of examples 1-9 of the present application are all superior to the bending strength of comparative example 2, and therefore, the bending strength of the present application can be improved by combining the first reinforcing mesh and the composite reinforcing layer, and the overall mechanical properties can be improved.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.