阅读说明：本技术 一种数字化木纹3d数码喷印实木类地板及其制造方法 (Digital wood grain 3D digital jet printing solid wood floor and manufacturing method thereof ) 是由 姬敏达 付珏杰 姚玉良 桂成胜 沈云芳 施晓宏 敖景伟 潘锦垭 赵建忠 于 2020-12-16 设计创作，主要内容包括：为解决数字化木纹3D数码喷印地板附着力阻燃性能不达标等问题,并克服现有技术不足。本发明提供一种高附着力的阻燃型数字化木纹3D数码喷印实木类地板。所述地板可以为实木地板、实木复合地板及实木饰面的其它复合地板,其结构由下至上依次为地板主体、底层、标准色板层、数字化木纹3D数码喷印层、面层。该制备方法包括以下步骤：一、制备改性高附着力底漆；二、制备阻燃底漆；三、制备高附着力的阻燃型数字化木纹3D数码喷印实木类地板。其中制备高附着力的阻燃型数字化木纹3D数码喷印实木类地板包括：(1)制作底层；(2)制作标准色板层；(3)制作数字化木纹3D数码喷印层；(4)面层处理。(The problem that the adhesive force flame retardant property of a digital wood grain 3D digital jet printing floor is not up to standard is solved, and the defects of the prior art are overcome. The invention provides a high-adhesion flame-retardant digital wood grain 3D digital jet printing solid wood floor. The floor can be a solid wood floor, a solid wood composite floor and other composite floors with solid wood veneers, and the floor sequentially comprises a floor main body, a bottom layer, a standard color plate layer, a digital wood grain 3D digital spray printing layer and a surface layer from bottom to top. The preparation method comprises the following steps: firstly, preparing a modified high-adhesion primer; secondly, preparing flame-retardant primer; and thirdly, preparing the flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesive force. The preparation of the flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesive force comprises the following steps: (1) manufacturing a bottom layer; (2) manufacturing a standard color plate layer; (3) manufacturing a digital wood grain 3D digital jet printing layer; (4) and (6) surface layer treatment.)

1. A manufacturing method of a digital wood grain 3D digital jet printing solid wood floor comprises the following steps: the floor is characterized by comprising a floor main body, a bottom layer, a standard color plate layer, a digital wood grain 3D digital jet printing layer and a surface layer from bottom to top in sequence; the manufacturing method comprises the following steps:

firstly, preparing a modified high-adhesion primer:

according to the mass parts, 100 parts of ethylene acrylate copolymer, 100 parts of 100-150 parts of bisphenol A glycerol dimethacrylate monomer, 100-150 parts of monomethacrylate monomer, 5-10 parts of modified photoinitiator, 1-5 parts of talcum powder, 2-3 parts of isophorone and 2-3 parts of cyclopropane are added into a reaction kettle and stirred uniformly to prepare the modified high-adhesion primer;

the modification method of the modified photoinitiator comprises the following steps: 1) adding 100 parts of distilled water into a reaction kettle, adjusting the pH value to 5-5.5 by using dilute hydrochloric acid, adding 10-15 parts of vinyl triethoxysilane and 22-24 parts of photoinitiator IHT-PI 659 (2-hydroxy-4- (2-hydroxyethoxy) -2-methyl propiophenone), and reacting for 12-15 hours; 2) adding 20-40 parts of polyethylene glycol and 0.2-0.4 part of triphenylphosphine, and reacting at 100-110 ℃ for 1-2 hours; 3) cooling to 50-60 ℃, and purifying for 1-3 times by adopting isopropyl ether to obtain the epoxy macromolecular photoinitiator; 4) adding 40-50 parts of the prepared epoxy macromolecular photoinitiator, 8-10 parts of 3-aminopropyltriethoxysilane and 10-12 parts of pyridine into a reaction kettle, heating to 40-60 ℃, reacting for 20-60 minutes, and cooling to obtain a modified photoinitiator;

secondly, preparing a flame-retardant primer:

according to the mass parts, 100 parts of ethylene acrylate copolymer, 100-150 parts of bisphenol A glycerol dimethacrylate monomer, 100-150 parts of monomethacrylic acid monomer, 5-10 parts of photoinitiator TPO (2,4, 6-trimethylbenzoyl chloride), 20-30 parts of microencapsulated ammonium polyphosphate, 1-5 parts of talcum powder, 2-3 parts of isophorone and 2-3 parts of cyclopropane are added into a reaction kettle and uniformly stirred to prepare the flame-retardant primer;

the microencapsulated ammonium polyphosphate has a particle size of 100-200 mu m, and the synthesis process comprises the following steps: 1) adding 18-35 parts of melamine and 10-30 parts of 35% by mass of formaldehyde solution into a reaction kettle for stirring, adjusting the pH value to 8-9 by using 3-5% by mass of sodium carbonate solution, heating to 70-80 ℃, stirring at the speed of 300-400r/min, and reacting for 20-30min to obtain a pre-polymerization solution; 2) adding 10-15 parts of ethanol with the mass fraction of 40% into 10-15 parts of ammonium polyphosphate, stirring for 10-20 minutes, and uniformly dispersing to obtain a ammonium polyphosphate suspension; 3) adding the prepolymerization solution with equal mass into the ammonium polyphosphate suspension liquid, adjusting the pH value to 4.5-6 by using dilute hydrochloric acid, then heating to 50-100 ℃, stirring and reacting at the speed of 500-600r/min for 40-120min, and performing suction filtration, washing and drying to obtain the ammonium polyphosphate microcapsule;

thirdly, preparing the flame-retardant digital wood grain 3D digital spray printing solid wood floor with high adhesive force

1) Manufacturing a bottom layer: the floor main body is made into a semi-finished product through the working procedures of surface treatment, coloring by water-based pigment, coating of adhesion primer, coating of putty and sanding;

2) manufacturing a standard color plate layer: coating a white covering primer on the surface of the semi-finished product, and coating a color correction primer on the white covering primer to prepare a standard color plate;

3) manufacturing a digital wood grain 3D digital jet printing layer: removing burrs and dust from the standard color plate, coating high-adhesion primer, and carrying out digital wood grain 3D digital jet printing to obtain a digital jet printing plate;

4) manufacturing a surface layer: and coating the digital jet printing plate with a modified high-adhesion primer, a sanding primer, a flame-retardant primer and a finish paint to prepare the flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesion.

2. The manufacturing method according to claim 1, wherein in the step three 1), the floor main body is one of a solid wood floor, a solid wood composite floor and other solid wood faced composite floors; treating the surface of the floor main body, and grinding and polishing; coating the water-based coloring primer on the surface of the floor, wherein the coating weight is 3-5g/m²Drying by adopting a 6M jet dryer with the temperature of 70-80 DEG CDrying at 25-35 seconds; coating the adhesive base with a coating weight of 10-15g/m²The UV curing energy is 80-90mj/cm²(ii) a Coating the putty with the coating weight of 30-33g/m²The UV curing energy is 60-70mj/cm²(ii) a Coating the putty with the coating weight of 20-23g/m²(ii) a The UV curing energy is 100-²(ii) a Sanding is carried out by using a No. 320 abrasive belt.

3. The production method according to claim 1, wherein in the step three 2), a white masking primer is applied in an amount of 10 to 13g/m²The UV light curing energy is 60-65mj/cm²(ii) a Coating white covering primer with the coating weight of 10-13g/m²The UV light curing energy is 60-65mj/cm²(ii) a Coating white covering primer with the coating weight of 20-23g/m²The UV light curing energy is 80-90mj/cm²(ii) a Coating the color-modifying primer, wherein the coating weight is 10-15g/m²The UV light curing energy is 80-90mj/cm²。

4. The manufacturing method according to claim 1, wherein in the third step 3), after the standard color plate is formed by surface coating, the standard color plate is sequentially passed through an automatic feeder, a deburring machine and a dust remover; coating modified high-adhesion primer with coating weight of 8-10g/m²UV curing energy of 50-55mj/cm²(ii) a Carrying out digital wood grain 3D digital jet printing: firstly, making a digital jet printing sample drawing; then cutting and toning the required pattern; the floor passes below the spray head at a constant speed of 0.6-0.8m/s through the conveyer belt; the spraying amount is 10-13g/m²Finally, curing and drying by a UV lamp, wherein the curing energy of the UV lamp is 70-75mj/cm²。

5. The method according to claim 1, wherein in the third step 4), the modified high adhesion primer is coated in an amount of 8-10g/m²The UV curing energy is 50-55mj/cm²(ii) a Coating flame-retardant primer with the coating weight of 10-13g/m²The UV curing energy is 80-85mj/cm²(ii) a Coating a sanding primer in the coating amount10-13g/m²UV curing energy is 50-55mj/cm²(ii) a Sanding, namely, adopting a 320# abrasive belt; coating a flame-retardant primer, wherein the coating weight is 14-18g/m²UV curing energy is 50-60mj/cm²(ii) a Coating flame-retardant primer with the coating weight of 10-20g/m²The UV curing energy is 100-110mj/cm²(ii) a Sanding, namely sanding by using a No. 320 abrasive belt; coating a first finish coat with a coating weight of 5-8g/m²UV curing energy of 100-²(ii) a Coating a second finish coat with a coating weight of 6-10g/m²UV curing energy 350-370mj/cm²。

Technical Field

The invention relates to the technical field of production and processing of solid wood floors, in particular to a high-adhesion flame-retardant digital wood grain 3D digital jet printing solid wood floor and a manufacturing method thereof.

Background

With the increasing income of people and living standard in China, the requirements for house decoration are higher and higher, and the design style of decoration tends to be integrated. The wood floor is an important link in the design of household artistic modeling. The continuous development of the wood floor industry prompts people to continuously research and innovate the surface decoration and additional functions of the wood floor. The traditional wood floor surface decoration means is single, and the development of modern industrial technology provides a series of solutions for the wood floor surface in the form of 'painting' decoration, such as silk screen printing, heat transfer printing, water transfer printing and the like, but the problems of high cost, complex process, long manufacturing period, low yield, poor effect and the like in actual production. With the emergence of ultraviolet curing (UV) ink-jet technology, the decoration is carried out on the surface of the wood floor by using UV flat plate spray painting, and the decoration wood floor has obvious advantages in the aspects of cost, effect and the like.

The UV ink-jet printing floor generally comprises the following steps of (1) making a digital jet printing pattern decorative picture, (2) preparing a base material, (3) coating sealing putty, (4) digital jet printing decoration, (5) coating UV primer and (6) coating UV finish. Daily production research shows that the UV ink-jet printing floor has the problems that the paint film adhesion and the flame retardant property can not reach the national standard and the like. The research of flame-retardant digital wood grain 3D digital jet printing floors with high adhesive force is always the key point of industrial research. At present, research reports on digital jet printing floors are available, for example, a paper "application of UV ink jet printing technology to furniture surface decoration" analyzes the possibility of painting decoration on the floor surface by using UV ink; patent CN201110428832.X < UV digital spray printing manufacturing method of floor and furniture plate type component >, and patent CN201710614572 < archaizing digital colored drawing floor without aldehyde flame retardant and preparation method thereof < U > all provide manufacturing methods of UV digital spray printing floor. The existing manufacturing process is mostly simple to combine UV ink with conventional UV paint, the adhesive force of the paint film of the finished floor cannot reach level 1, and the flame retardant property cannot reach B₁-C standard, etc.

Disclosure of Invention

The problem that the adhesive force flame retardant property of a digital wood grain 3D digital jet printing floor is not up to standard is solved, and the defects of the prior art are overcome. The invention provides a high-adhesion flame-retardant digital wood grain 3D digital jet printing solid wood floor. The floor can be a solid wood floor, a solid wood composite floor and other composite floors with solid wood veneers, and the structure of the floor sequentially comprises a floor main body, a bottom layer, a standard color plate layer, a digital wood grain 3D digital spray printing layer and a surface layer from bottom to top; the preparation method comprises the following steps:

firstly, preparing modified high-adhesion primer

The modified high-adhesion primer comprises the main components of 100 parts of ethylene acrylate copolymer, 100-150 parts of bisphenol A glycerol dimethacrylate monomer, 100-150 parts of monomethacrylate monomer, 5-10 parts of modified photoinitiator, 1-5 parts of talcum powder, 2-3 parts of isophorone and 2-3 parts of cyclopropane according to the mass ratio;

as a further description of the above scheme, the preparation method of the modified high adhesion primer is as follows:

100 parts of ethylene acrylate copolymer, 100-150 parts of bisphenol A glycerol dimethacrylate monomer, 100-150 parts of monomethacrylate monomer, 5-10 parts of modified photoinitiator, 1-5 parts of talcum powder, 2-3 parts of isophorone and 2-3 parts of cyclopropane are added into a reaction kettle according to the mass ratio. And stirring uniformly at 20-50 ℃ to obtain the modified high-adhesion primer.

Preferably, the modification method of the modified photoinitiator comprises the following steps: 1) adding 100 parts of distilled water into a reaction kettle, adjusting the pH value to 5-5.5 by using dilute hydrochloric acid, adding 10-15 parts of vinyl triethoxysilane and 22-24 parts of photoinitiator IHT-PI 659 (2-hydroxy-4- (2-hydroxyethoxy) -2-methyl propiophenone), and reacting for 12-15 hours; 2) adding 20-40 parts of polyethylene glycol and 0.2-0.4 part of triphenylphosphine, and reacting at 100-110 ℃ for 1-2 hours; 3) cooling to 50-60 ℃, and purifying for 1-3 times by adopting isopropyl ether to obtain the epoxy macromolecular photoinitiator; 4) adding 40-50 parts of the prepared epoxy macromolecular photoinitiator, 8-10 parts of 3-aminopropyltriethoxysilane and 10-12 parts of pyridine into a reaction kettle, heating to 40-60 ℃, reacting for 20-60 minutes, and cooling to obtain a modified photoinitiator;

the modified photoinitiator is adopted for increasing the crosslinking density of the coating, and the polyethylene glycol segment chain is arranged in the molecule, so that the internal stress between the coatings can be reduced, and the adhesive force is increased;

secondly, preparing the flame-retardant primer

The flame-retardant primer mainly comprises, by mass, 100 parts of an ethylene acrylate copolymer, 100-150 parts of a bisphenol A glycerol dimethacrylate monomer, 100-150 parts of a monomethacrylate monomer, 5-10 parts of a photoinitiator TPO (2,4, 6-trimethylbenzoyl chloride), 20-30 parts of microencapsulated ammonium polyphosphate, 1-5 parts of talcum powder, 2-3 parts of isophorone and 2-3 parts of cyclopropane.

The preparation method of the flame-retardant primer in the second step comprises the following steps:

100 parts of polyacrylate polymer, 100-150 parts of bisphenol A glycerol dimethacrylate monomer, 100-150 parts of monomethacrylate monomer, 5-10 parts of photoinitiator TPO (2,4, 6-trimethylbenzoyl chloride), 20-30 parts of microencapsulated ammonium polyphosphate, 1-5 parts of talcum powder, 2-3 parts of isophorone and 2-3 parts of cyclopropane are added into a reaction kettle according to the mass ratio and are uniformly stirred at the temperature of 20-50 ℃ to prepare the flame-retardant primer.

Preferably, the microencapsulated ammonium polyphosphate obtained in the second step has a particle size of 100-200 ammonium, and the synthesis process comprises: 1) adding 18-35 parts of melamine and 10-30 parts of 35% by mass of formaldehyde solution into a reaction kettle for stirring, adjusting the pH value to 8-9 by using 3-5% by mass of sodium carbonate solution, heating to 70-80 ℃, stirring at the speed of 300-400r/min, and reacting for 20-30min to obtain a pre-polymerization solution; 2) adding 10-15 parts of ethanol with the mass fraction of 40% into 10-15 parts of ammonium polyphosphate, stirring for 10-20 minutes, and uniformly dispersing to obtain a ammonium polyphosphate suspension; 3) and adding the prepolymerization liquid with equal mass into the ammonium polyphosphate suspension liquid, adjusting the pH value to 4.5-6 by using dilute hydrochloric acid, heating to 50-100 ℃, stirring and reacting at the speed of 500-600r/min for 40-120min, and performing suction filtration, washing and drying to obtain the microencapsulated ammonium polyphosphate. The microencapsulated ammonium polyphosphate is heated and decomposed to release gases such as ammonia gas and nitrogen gas, so that oxygen in the air is diluted, the combustion reaction is not facilitated, and the microencapsulation of the ammonium polyphosphate forms an integral microencapsulated ammonium polyphosphate shape on the surface, so that the flame retardant effect is achieved, and the fireproof capacity and the effect are further enhanced.

Thirdly, preparing a bottom layer of the flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesive force

1) Treating the surface of the floor main body, and grinding and polishing;

2) coating the water-based coloring primer on the surface of the floor, wherein the coating weight is 3-5g/m²Drying by adopting a 6M jet dryer, wherein the temperature of the dryer is 70-80 ℃, and the drying time is 25-35 seconds;

3) coating the adhesive base with a coating weight of 10-15g/m²The UV curing energy is 80-90mj/cm²；

4) Coating the putty with the coating weight of 30-33g/m²The UV curing energy is 60-70mj/cm²；

6) Coating the putty with the coating weight of 20-23g/m²(ii) a The UV curing energy is 100-²；

5) Sanding is carried out by using a No. 320 abrasive belt.

The adhesion base is added after the water-based adhesion base, and the adhesion force of a paint film and the surface of a floor is increased by combining the water-based adhesion base and the oil-based adhesion base. The floor surface is completely filled by coating two layers of putty, and the UV curing energy of the second layer of putty is 100-²So as to ensure better curing degree and facilitate sanding.

(II) preparing a standard color plate layer

1) Coating white covering primer with the coating weight of 10-13g/m²The UV light curing energy is 60-65mj/cm²；

2) Coating white covering primer with the coating weight of 10-13g/m²The UV light curing energy is 60-65mj/cm²；

3) Coating white covering primer with the coating weight of 20-23g/m²The UV light curing energy is 80-90mj/cm²；

4) Coating the color-modifying primer, wherein the coating weight is 10-15g/m2, and the UV light curing energy is 80-90mj/cm 2.

The white covering primer of the standard color plate layer covers wood grains and defects on the surface of the floor, and the color finishing primer is subjected to color coating to finally present standard colors such as white, beige, yellow and the like.

The white covering primer is formed by mixing white paint and transparent primer according to the mass ratio of 2:1, and the white covering primer is coated by roller for 3-4 times, so that the wood grain covering effect and the paint film adhesive force are ensured;

the color correction priming paint is UV varnish added with color concentrates, the color system of the color concentrates is matched with that of a finished product floor, and the color of the color correction priming paint is matched with that of the finished product floor and can be white, yellow, beige and the like; the coating weight is 20-23g/m²The UV curing energy is 60-65mj/cm²。

(III) manufacturing a digital wood grain 3D digital jet printing layer

1) After the surface of the color plate is coated into a standard color plate, the color plate passes through an automatic feeding machine, a deburring machine and a dust remover in sequence;

2) coating modified high-adhesion primer with coating weight of 8-10g/m²UV curing energy of 50-55mj/cm²；

3) Carrying out digital wood grain 3D digital jet printing: firstly, making a digital jet printing sample drawing; then cutting and toning the required pattern; the floor passes through the lower part of the spray head at a constant speed of 0.6-0.8m/s through the conveyer belt. The spraying amount is 10-13g/m²Finally, curing and drying by a UV lamp, wherein the curing energy of the UV lamp is 70-75mj/cm²；

The coating weight of the modified high-adhesion primer is 8-10g/m²UV curing energy is 50-55mj/cm²The curing degree of the high-adhesion primer is 80-85%, and the primer and the UV ink can be fully combined, so that better adhesion is ensured.

Preferably, the digital jet printing equipment in the digital wood grain 3D digital jet printing layer in the third step is online high-speed jet printing equipment, the jet printing precision is 800 multiplied by 400dpi, and the jet printing pattern is a preset pattern of computer software. The ink for jet printing is oily UV ink.

(IV) making a surface layer

1) Coating modified high-adhesion primer with the coating weight of 8-10g/m²The UV curing energy is 50-55mj/cm²；

2) Coating flame-retardant primer with the coating weight of 10-13g/m²The UV curing energy is 80-85mj/cm²；

3) Coating sanding primer with the coating weight of 10-13g/m²UV curing energy is 50-55mj/cm²；

4) Sanding, namely, adopting a 320# abrasive belt;

5) coating a flame-retardant primer, wherein the coating weight is 14-18g/m²UV curing energy is 50-60mj/cm²；

6) Coating flame-retardant primer with the coating weight of 10-20g/m²The UV curing energy is 100-110mj/cm²；

7) Sanding is carried out by using a No. 320 abrasive belt.

8) Coating a first finish coat with a coating weight of 5-8g/m²UV curing energy of 100-²；

9) Coating a second finish coat with a coating weight of 6-10g/m²UV curing energy 350-370mj/cm²。

Preferably, the modified adhesive primer is coated once in each of the two steps of manufacturing the digital wood grain 3D digital jet printing layer and the surface layer, and the coating weight is 8-10g/m²The UV curing energy is 50-55mj/cm²And the UV ink in the jet printing layer can be well combined with the bottom layer and the surface layer through two modified high-adhesion primers coated on the front and the back of the front and the back digital jet printing layers.

Preferably, the coating weight of the flame-retardant primer in the fourth step is 10-20g/m²Coating for 2-4 times, and UV curing energy is 50-110mj/cm²。

Preferably, the coating weight of the finishing coat in the fourth step is 5-10g/m²The UV curing energy is 100-370mj/cm²。

The invention has the following beneficial effects:

1. the flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesive force and the processing technology thereof are provided, the adhesive force of a paint film of the prepared floor is high, the flame-retardant performance reaches the standard, and the appearance is attractive;

2. the invention develops a modified high-adhesion primer and coats 8-10g/m of the primer on the upper surface and the lower surface of a digital wood grain 3D digital spray printing layer respectively²UV curing energy is 50-60mj/cm²The problem of poor adhesive force between the UV ink and the common UV coating is solved;

3. the invention develops a phosphorus-containing flame-retardant primer, and solves the problem ofThe flame retardant property of the solid wood floor can not reach B₁Problem of-C.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

fig. 1 is a schematic structural diagram of a flame-retardant digital wood grain 3D digital jet-printed solid wood floor with high adhesive force, according to the invention: 1-paint layer, 2-floor main body;

FIG. 2 is a schematic diagram of a paint layer structure of a flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesion provided by the invention: 11-surface layer, 12-digital wood grain, 13-standard color plate layer 3D digital spray printing layer and 14-bottom layer.

Detailed Description

The following embodiments apply to paint types:

TABLE 1 other paint numbers and characteristic tables

Name of paint	Model number
		Water-based colored primer	Dazhou Baili brand A185721502
Adhesion primer	Dazhou Baili brand A185721801
		Putty	Dazhou Baili brand A185721911
SandingPrimer coating	Dazhou Baili brand A185721301
		Finish paint	Zhongbaili brand A85722180

The specific embodiment of the invention is as follows:

example 1

Firstly, preparing modified high-adhesion primer

Adding 100 parts of ethylene acrylate copolymer, 150 parts of bisphenol A glycerol dimethacrylate monomer, 100 parts of mono-methacrylic acid monomer, 8 parts of modified photoinitiator, 3 parts of talcum powder, 2 parts of isophorone and 3 parts of cyclopropane into a reaction kettle according to the mass ratio, and uniformly stirring to obtain the modified high-adhesion primer;

the modification method of the modified photoinitiator comprises the following steps: 1) adding 100 parts of distilled water into a reaction kettle, adjusting the pH to 5.5 by using dilute hydrochloric acid, adding 13 parts of silane coupling agent vinyl triethoxysilane and 22 parts of photoinitiator IHT-PI 659 (2-hydroxy-4- (2-hydroxyethoxy) -2-methyl propiophenone, Shanghai Kai Yin chemical Co., Ltd.), and reacting for 12 hours; 2) adding 30 parts of polyethylene glycol and 0.3 part of catalyst triphenylphosphine, and reacting at 105 ℃ for 1.5 hours; 3) cooling to 55 ℃, and purifying for 3 times by adopting isopropyl ether to obtain the epoxy macromolecular photoinitiator; 4) adding more than 40 parts of the prepared epoxy macromolecular photoinitiator, 9 parts of 3-aminopropyltriethoxysilane and 11 parts of pyridine into a reaction kettle, heating to 550 ℃, reacting for 45 minutes, and cooling to obtain a modified photoinitiator;

secondly, preparing modified flame-retardant primer

100 parts of ethylene acrylate copolymer, 150 parts of bisphenol A glycerol dimethacrylate monomer, 100 parts of mono-methacrylic acid monomer, 5 parts of photoinitiator TPO, 30 parts of microencapsulated ammonium polyphosphate, 4 parts of talcum powder, 3 parts of isophorone and 2 parts of cyclopropane are added into a reaction kettle according to the mass ratio. And uniformly stirring at 40 ℃ to obtain the modified flame-retardant primer.

The synthesis process of the microencapsulated ammonium polyphosphate comprises the following steps: 1) adding 25 parts of melamine and 20 parts of 35% by mass of formaldehyde solution into a reaction kettle, stirring, adjusting the pH value to 8.5 by using 4% by mass of sodium carbonate solution, heating to 75 ℃, stirring at the speed of 400r/min, and reacting for 20min to obtain a pre-polymerization solution; 2) adding 13 parts of ethanol with the mass fraction of 40% into 15 parts of ammonium polyphosphate, stirring for 20 minutes, and uniformly dispersing to obtain a multi-ammonium polyphosphate suspension; 3) and adding the prepolymerization liquid with equal mass into the ammonium polyphosphate suspension liquid, adjusting the pH value to 5 by using dilute hydrochloric acid, heating to 80 ℃, stirring at the speed of 600r/min for reaction for 70min, and performing suction filtration, washing and drying to obtain the microencapsulated ammonium polyphosphate.

Thirdly, preparing the flame-retardant digital wood grain 3D digital spray printing solid wood floor with high adhesive force

First, the bottom layer is prepared

1) Carrying out surface treatment on the floor main body, and grinding and polishing;

2) coating the surface of the floor with water-based coloring primer, wherein the coating weight is 5g/m²Drying by adopting a 6M jet dryer, wherein the temperature of the dryer is 70 ℃, and the drying time is 35 seconds;

3) coating an oily adhesion primer, wherein the coating weight is 10g/m2, and the UV curing energy is 80mj/cm 2;

4) coating the putty with the coating weight of 30g/m²UV curing energy of 60mj/cm²；

6) Coating the putty with the coating weight of 20g/m²(ii) a UV curing energy of 100mj/cm²；

5) Sanding is carried out by using a No. 320 abrasive belt.

(II) preparing a standard color plate layer

7) Coating white covering primer with the coating weight of 10g/m²The UV light curing energy is 60mj/cm²；

8) Coating white covering primer with the coating weight of 10g/m²The UV light curing energy is 60mj/cm²；

9) Coating a white masking primer in an amount of 20g/m²The UV light curing energy is 60mj/cm²；

11) Coating yellow color-modifying primer with the coating weight of 20g/m²The UV light curing energy is 60mj/cm²

12) Sanding was performed using a No. 320 abrasive belt.

The white covering primer is formed by mixing white paint and transparent primer according to the mass ratio of 2:1, and the white covering primer is coated by roller for 3-4 times, so that the wood grain covering effect and the paint film adhesive force are ensured;

the yellow color-modifying primer is UV varnish added with color concentrates, and the color of the color-modifying primer is matched with the color system of the finished floor;

(III) manufacturing a digital wood grain 3D digital jet printing layer

13) Sequentially passing through an automatic feeding machine, a deburring machine and a dust remover;

14) coating modified high-adhesion primer with the coating weight of 10g/m²UV curing energy 50mj/cm²；

15) The base material passes through the lower part of a spray head of the UV ink spraying equipment at a constant speed of 0.8m/s through a conveying belt. The spraying amount is 10g/m²Curing and drying by a UV lamp with the curing energy of 70mj/cm²；

(IV) making a surface layer

16) Coating modified high-adhesion primer with the coating weight of 10g/m²UV curing energy of 50mj/cm²；

17) Coating flame-retardant primer with the coating weight of 10g/m²UV curing energy is 80mj/cm²；

18) Coating a sanding primer with the coating weight of 10g/m²UV curing energy is 50mj/cm²；

19) Sanding, namely, adopting a 320# abrasive belt;

20) coating a flame-retardant primer with the coating weight of 14g/m²UV curing energy is 60mj/cm²；

21) Coating flame-retardant primer with the coating weight of 10g/m²UV curing energy of 100mj/cm²；

22) Sanding is carried out by using a No. 320 abrasive belt.

23) First coat, coatThe cloth amount is 8g/m²UV curing energy 110mj/cm²；

24) Coating a second topcoat in an amount of 10g/m²UV curing energy of 350mj/cm²。

The types of the water-based coloring primer, the adhesion primer, the putty, the sanding primer and the finish paint are shown in Table 1.

Comparative example 1

The process in example 1 is not changed, and the flame-retardant digital wood grain 3D digital jet printing solid wood floor with high adhesion is prepared by adopting the Dazhou Baili brand A185721801 to adhere to the primer to replace the modified primer with high adhesion.

Comparative example 2

The production process in example 1 was not changed, and a flame-retardant digitized wood grain 3D digital jet printing solid wood floor with high adhesion was prepared by coating a flame-retardant primer (mainly containing dibromodiphenyl ethane).

Comparative example 3

The production processes of the steps (i), (iii) and (iv) in the example 1 are not changed, and the standard color plate production in the step (ii) is changed to:

1) coating white covering primer with the coating weight of 35g/m²The UV light curing energy is 65mj/cm²；

2) Coating white covering primer with the coating weight of 35g/m²The UV light curing energy is 65mj/cm²；

3) Coating the color-modifying primer with the coating weight of 22g/m²The UV light curing energy is 65mj/cm²。

Comparative example 4

The production process in example 1 was not changed, and the Dazhou Baili brand A185721801 was used for the primer adhesion in step (14) in the third step.

Comparative example 5

The production processes of the steps (i), (iii) and (iv) in the example 1 are not changed, and the standard color plate production in the step (ii) is changed to:

1) coating a white masking primer in an amount of 12g/m²The UV light curing energy is 35mj/cm²；

2) Coating ofWhite masking base coat with a coating weight of 12g/m²The UV light curing energy is 35mj/cm²；

3) Coating the color-modifying primer with the coating weight of 12g/m²The UV light curing energy is 35mj/cm²。

The indexes of the floor, such as adhesive force, abrasion resistance of a paint film, hardness of the paint film and the like are detected according to a detection method in GB/T17657 plus 2013 physicochemical property test method for artificial boards and decorative artificial boards, and the flame retardant property is classified according to GB 8624 plus 2012 burning property of building materials and products, and the results are shown in the following table 2.

Table 2 table comparing the test results of examples and comparative examples

As can be seen from the example 1 and the comparative example 1, the adhesion of the paint film can be improved from 3 grade to 1 grade by adopting the modified high-adhesion primer, and other properties are not influenced; from the comparison of example 1 with comparative example 2, it can be seen that the critical heat radiation flux of the floor is increased from 3.2 KW/square meter to 12.5KW/m by using the flame retardant primer to replace the commercially available flame retardant primer²The height of a flame tip is reduced from 180mm to 120mm within 20s, and the comprehensive flame retardant grade is B₂Promotion of-D to B₁-B; as can be seen from the comparison of example 1 with comparative example 3 and comparative example 5, increasing the coating amount of the white masking primer or decreasing the UV curing energy both reduced the adhesion from level 1 to level 2; as can be seen from example 1 and comparative example 4, the function of better adhesion enhancement can be achieved only by respectively coating the modified high-adhesion primers on the upper and lower surfaces of the digital wood grain 3D digital jet printing layer, and if the modified high-adhesion primers are coated only before jet printing, the adhesion grade can only reach 2 grades.

The basic method, essential features and advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.