CN103184791A - Solid wood composite floor and manufacture method thereof - Google Patents

Abstract

The invention relates to the field of composite floor preparation, in particular to a solid wood composite floor and a manufacturing method thereof. A kind of solid wood composite flooring, which comprises from top to bottom: a paint layer, a decoration layer, a base material layer and a balance layer, and the base material layer comprises a wood veneer layer and a layer coated between the wood veneer layers Modified soybean glue layer; between the base material layer and the decoration layer, between the base material layer and the balance layer, an isocyanate glue layer or a melamine glue layer or a modified soybean glue layer is coated. The solid wood composite floor manufactured by the invention not only has high bonding strength and low formaldehyde emission, but also has the functions of anti-mildew, anti-corrosion, insect-proof and water-proof.

Description

A kind of solid wood composite floor and its manufacturing method

technical field

The invention relates to the field of composite floor preparation, in particular to a solid wood composite floor and a manufacturing method thereof.

Background technique

In recent years, with people's increasing awareness of environmental protection, the formaldehyde emission of indoor home decoration floors has been well controlled, reaching E1 level (formaldehyde emission within 1.5mg/L), E0 level (formaldehyde emission within 0.5mg /L), or even lower, such as the Chinese patent with publication number 202509731U (2012-10-31), which uses bio-based adhesives to prepare parquet with formaldehyde emission not greater than 0.1mg/L. However, the aqueous solution of formaldehyde is called formalin, which is a high-efficiency bactericidal disinfectant and can also be used as a preservative. The reduction of formaldehyde release on the floor makes the floor eaten by silverfish, termites and other pests frequently occur.

Contents of the invention

The first object of the present invention is to provide a solid wood composite floor to solve the above technical problems. Another object of the present invention is to provide a method for preparing solid wood composite flooring. The solid wood composite floor manufactured by the invention not only has high bonding strength and low formaldehyde emission, but also has the functions of anti-mildew, anti-corrosion, insect-proof and water-proof.

The first object of the present invention is achieved through the following technical solutions: a solid wood composite floor, which comprises from top to bottom: a paint layer, a decorative layer, a substrate layer and a balance layer, and the substrate layer includes a wooden A veneer layer and a modified soybean glue layer coated between the wood veneer layers; an isocyanate glue layer or melamine glue is coated between the base material layer and the decorative layer, and between the base material layer and the balance layer layer or modified soybean gum layer.

The adhesive between the wooden veneer layers of the solid wood composite floor of the present invention adopts soybean glue, and the adhesive between the base material layer and the decorative layer, and between the base material layer and the balance layer is an isocyanate adhesive layer or a melamine adhesive layer or a modified soybean Adhesive layer, wherein soybean gum comprises the raw material of following mass parts:

100 parts of water;

15-40 servings of soybean derivatives;

Alkali 3-8 parts;

Silicate 0.5-3 parts;

Modifier 0.2-5 parts;

Curing agent 0.3-2.5 parts;

Acid 0.1-4 parts;

Water-based acrylic resin 0-20 parts;

Insect repellent 0.1-1.5 parts;

Filling 1-10 parts.

The soybean derivative in the present invention is soybean protein powder or soybean protein isolate. Soy protein powder is usually made from soybean meal, the residue of soybean processing, after grinding. Soy protein isolate is obtained by further processing and separating soybean protein powder to remove most of the sugar.

Bases of the present invention include sodium hydroxide or calcium hydroxide. The filler in the present invention is one or a mixture of two or more of flour, starch, tannin, diatomite, kaolin, bentonite, talcum powder and montmorillonite. The addition of fillers increases the initial viscosity of soybean gum and improves the pre-compression effect of the board when soybean gum is used. the

Soybean derivatives contain a large amount of soy protein, and soy protein mainly plays a bonding role in soy glue. Therefore, it is very environmentally friendly to use soy glue, which is mainly composed of soy protein, as an adhesive for solid wood composite flooring. Among them, due to the non-covalent bonds such as van der Waals force, hydrogen bond and hydrophobic bond, the intermolecular bonds are tightly combined, and the bonding cannot be achieved. Therefore, it needs to be modified to expand the soybean protein and increase the bonding point of the intermolecular reaction. , in order to play a bonding effect and hydrophobic effect; in addition, because the use of soybean protein as the main adhesive will reduce the amount of formaldehyde released, it will cause the defect that the bonded solid wood composite floor is easy to be attacked by insects and ants, so it is necessary to Add energy insect repellant to soybean gum. In solving the above problems, the inventors have found through long-term research that during the unfolding process of soybean protein, if too much unfolding will lead to excessive exposure of protein molecules, which will reduce its shear strength and hydrophobic effect as an adhesive, thereby affecting the bonding effect, and too little leakage will affect the bonding effect; in addition, the addition of insect repellent will affect the bonding effect of soybean glue, which is also the difficulty of adding insect repellent to soybean glue. Therefore, the inventor not only needs to strictly match and adjust the composition and content of soybean gum to make it have high adhesive strength and low formaldehyde emission, but also adjust the content and composition of insect repellent so that soybean gum can also It has anti-mildew, anti-corrosion, insect-proof and waterproof functions.

In order to solve the above problems, the inventor proceeds from two aspects:

1. Adjust the type and content of other ingredients in soybean gum to ensure that the soybean protein has a suitable amount of leakage when it is unfolded to suit the reaction of other compounds, so that it can produce hydrophobicity and strong bonding strength.

2. Adjust the amount of insect repellent added to reduce its adverse effect on the adhesive strength, so that the formaldehyde release of soybean gum is low, and it also has the functions of anti-mildew, anti-corrosion, and anti-insect.

The present invention uses alkali and modifying agent to cooperate to modify soybean protein, so that the protein will not be degraded when it is unfolded, and it is ensured that there are appropriate exposed groups; because the alkali in the present invention has a strong ability to unfold soybean protein effect, but used alone will cause part of the soybean protein to decompose and cannot play a good bonding effect; therefore, after long-term research, the inventors have found that adding modifiers and alkalis can greatly improve the modification effect, because modifiers such as Urea does not degrade soybean protein when it is hydrolyzed; in addition, the inventors found that no matter whether adding alkali or urea alone, a high concentration is required to fully expand the soybean egg, and high concentration of alkali or urea will deform the soybean protein. Excessive increase leads to the decrease of its shear strength; and low concentration of alkali or urea can not make the soybean protein unfold to reach the appropriate amount of leakage required by the present invention, and can not achieve bonding effect and good hydrophobic effect; Therefore, according to the content of soybean derivatives, the present invention rationally adjusts the addition amount of alkali and modifier to achieve the desired effect of the present invention.

In addition, the silicate described in the present invention is sodium silicate or potassium silicate, which can cooperate with modifiers and alkalis to promote the expansion of soybean protein and stabilize the cross-linking reaction in the gel-making process, so that the modified The water resistance and bonding strength of the non-toxic soybean gum are more excellent; the water-based acrylic resin in the present invention contains a carbonyl group, which can react with nucleophilic groups such as amino groups and hydroxyl groups contained on the soybean protein polypeptide chain through grafting, so that protein molecules The interaction of the protein is reduced, the polypeptide chain can be unfolded, and the hydrophobic group in the protein molecule is turned out at the same time, and the water resistance is improved. Further cooperate with other ingredients in the soybean gum to improve the bonding strength of the soybean gum.

In addition, the acid described in the present invention is phosphoric acid or oxalic acid, which can adjust the pH value during the preparation of soybean gum with the addition of alkali, because in natural protein molecules, most of the polar and non-polar groups Due to the effects of van der Waals forces, hydrogen bonds, hydrophobic interactions, etc., the bonding effect is poor, and when hydrolyzed or the pH value is increased, it can be beneficial to disperse and unfold protein molecules, exposing polar and non-polar groups, and being able to bond with The wood contacts and interacts, thereby improving the bonding strength of the adhesive; the acid of the present invention is used to adjust the pH value, and the pH value of the modified soybean gum is controlled between 6 and 8, and at the same time, a modifier is added within the pH value range , silicate and alkali can make the soybean protein expand appropriately, which is more conducive to reaching the amount of leaking groups required by the present invention.

Finally, the addition amount of the insect repellent of the present invention is obtained through long-term research by the inventor, and the addition amount cooperates with other ingredients in the soybean gum, not only will not affect the adhesive strength of the soybean gum of the present invention, but also can play a very good role. The anti-insect and anti-corrosion effects more effectively solve the defect that the existing boards are easy to be corroded by insects and ants due to the reduction of formaldehyde emission. The addition of insect repellant makes the insect repelling effect lasting, so that the product maintains a certain amount of drug loading, achieves long-term insect repelling function, and has a certain antiseptic performance, which can effectively prolong the storage period of the modified soybean gum and prevent the soybean gum from deteriorating in advance. Bond strength of the final product.

To sum up, the soybean gum prepared by the present inventors contains a low amount of formaldehyde, and can make the soybean protein expand protein molecules to an appropriate degree. The expanded protein molecules can not only react with other additives to increase the contact area and improve the adhesive force. Enhanced, and the hydrophobic groups of the modified protein molecules are mostly outward, which is easy to penetrate into the solid wood composite floor that needs glue, resulting in strong bonding strength and hydrophobicity, thus showing better shear strength and resistance. Water-based; at the same time, the addition of insect repellent makes the insect-proof effect lasting, so that the solid wood composite floor maintains a certain amount of drug loading, achieves long-term insect-proof function, and has a certain anti-corrosion performance, which can effectively extend the storage period of modified soybean gum and prevent soybean. Premature deterioration of the glue affects the final parquet's bonding strength.

Preferably, it includes the following raw materials in parts by mass:

100 parts of water;

20-30 servings of soybean derivatives;

Alkali 4-6 parts;

Silicate 2-3 parts;

Modifier 3-5 parts;

Curing agent 0.3-2.5 parts;

Sour 2-4 parts;

Water-based acrylic resin 10-15 parts;

Insect repellant 1-1.5 copies;

Filling 5-8 parts.

Preferably, the modifying agent is urea.

Preferably, it also includes 0.5-3 parts by mass of sulfite. The alkali-modified protein adhesive of the present invention also has a relatively high viscosity, and too much viscosity will affect the fluidity of the adhesive. Therefore, the present invention reduces its intermolecular interaction force by adding sulfite and then reduces the viscosity, because in the natural protein molecule The existence of disulfide bonds affects its molecular expansion and extension. Adding sulfite can cooperate with silicate as a reducing agent to cut the disulfide bonds between molecules or within molecules, thereby improving the surface hydrophobicity and foaming of protein molecules. and foam stability, but too many disulfide bond breaks will greatly reduce the surface hydrophobicity of soybean gum. Therefore, the addition of sulfite in the present invention is also through long-term research by the inventor to cooperate with other components to work together to ensure the viscosity of soybean gum. connection effect. the

Preferably, the curing agent is polyamide polyamine-epichlorohydrin. In the present invention, the curing agent is polyamide polyamine-epichlorohydrin (PAE), and polyamide polyamine-epichlorohydrin is a secondary amine in polyamide polyamine reacts with epichlorohydrin to form an ammonium salt containing epoxy Polyamide polyamine is soluble in water and relatively stable at room temperature. However, when it is used as a curing agent for soybean gum, it will react with protein to form a water-resistant cross-linked structure during the hot-pressing process, thereby improving the water resistance of the product. .

Preferably, the pyrethroid insect repellant is at least one of cypermethrin, fenvalerate, permethrin, bifenthrin and cypermethrin. The insect repellent described in the present invention is a pyrethroid insect repellent, and the pyrethroid insect repellent is in the form of microcapsules; the pyrethroid insect repellent in the microcapsule form not only has stable performance, but also has a long-lasting insect repellent effect and does not affect the adhesive Excellent bonding strength, and can be evenly dispersed in the adhesive, and can penetrate into the interior of the wood with the glue, so that the product maintains a certain amount of drug loading and achieves the function of long-term insect control. More importantly, pyrethroid insect repellents are highly efficient and low It has certain anti-corrosion properties, can effectively prolong the storage period of modified soybean gum, prevent soybean gum from deteriorating in advance, and affect the bonding strength of the final product.

Another object of the present invention is achieved by the following technical solutions: a method for manufacturing a solid wood composite floor as described in claims 4 to 7, which comprises the following steps in sequence:

a) Making modified soybean gum: mix alkali and water into lye, then add silicate, sulfite and modifier to the lye, stir for 3-10 minutes, and control the temperature at 80-96°C to obtain Preliminarily mix the solution, then add soybean derivatives to the preliminary mixed solution, stir for 10-60 minutes, and control the temperature at 80-96°C to obtain a mixed solution, then add a curing agent to the mixed solution, stir for 10-60 minutes Minutes to obtain a solidified mixed solution, add acid to the solidified mixed solution, stir for 5-10 minutes, obtain a regulating solution with a pH value of 6-8, then add water-based acrylic resin to the regulating mixed solution, and stir for 20- After 40 minutes, the adjusted mixed solution is obtained; finally, insect repellent and filler are added to the adjusted mixed solution, and stirred for 10-30 minutes.

b) coating the above-mentioned modified soybean glue on the wood veneer, and then forming a blank according to the direction of the wood texture of two adjacent wood veneer layers perpendicular to each other; c) forming the above-mentioned wooden veneer First cold pressing and then hot pressing to obtain a slab; d) trimming the above slab, and then sanding to obtain a substrate layer; e) coating isocyanate glue, melamine glue or modified soybean glue on the above substrate On the two outer surfaces of the layer, the decorative layer and the balance layer are respectively pasted on the two outer surfaces of the base material layer, and then the laminated plates are first cold-pressed and then hot-pressed; f) the above-mentioned plates are Carry out curing treatment, carry out sanding treatment after curing treatment, then open grooves for installation on its four sides, and finally paint, and obtain solid wood composite flooring. As preferably, in step c), the pressure during the cold pressing is 0.8～1.2Mpa, and the cold pressing time is 60～120min; the pressure during the hot pressing is 0.8～1.2Mpa, and the hot pressing temperature is 110～140°C. The pressure rate is 0.7-1.3min/mm.

Preferably, in step e), the pressure during cold pressing is 0.8-1.2Mpa, and the cold-pressing time is 60-120min; the pressure during hot-pressing is 0.8-1.2Mpa, and the hot-pressing temperature is 110-140°C The pressure rate is 0.7-1.3min/mm.

The beneficial effects of the present invention are:

1. The solid wood composite flooring of the present invention uses soybean glue as an adhesive, wherein the alkali and modifier cooperate to modify the soybean protein, so that the protein will not degrade when unfolded, and ensure that there are appropriate exposed groups; in addition After long-term research, the inventor adjusted the content of modifier and alkali, which is more conducive to the bonding strength and water resistance of soybean glue, so that the solid wood composite floor has a better use effect.

2. In the solid wood composite floor adhesive soybean glue of the present invention, acid is used to control the pH value of the modified soybean glue between 6 and 8. This range can make the soybean protein unfold moderately, and cooperate to achieve the leakage group required by the present invention. The amount increases the bonding strength of the parquet.

3. The insect repellant in the solid wood composite floor adhesive soybean glue of the present invention not only has stable performance, but also has a long-lasting insect repellent effect, which not only affects the bonding strength of the adhesive, but also can be evenly dispersed in the adhesive, and can penetrate into the wood with the glue, so that the product remains A certain amount of drug loading can achieve long-term insect repellent function. More importantly, the pyrethroid insect repellent has high efficiency and low toxicity, and has certain anti-corrosion properties, which can effectively prolong the storage period of modified soybean gum and prevent soybean gum from deteriorating in advance , affecting the bonding strength of the final product.

4. In the solid wood composite floor adhesive soybean glue of the present invention, the insect repellent and soybean glue are combined to control the formaldehyde emission of the solid wood composite floor within 0.1mg/L, and the bonding strength of the board meets the national standard II glue requirements ; It more effectively solves the defect that the solid wood composite floor is easily eroded by insects and ants due to the reduction of formaldehyde emission in the existing boards.

Detailed ways

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.

Example 1

Soybean gum configuration: add 3g of alkali and 100g of water into a three-neck round bottom flask, the alkali is sodium hydroxide, stir for 3 minutes to dissolve the sodium hydroxide, then add 0.5g of silicate and 0.5g of sodium hydroxide to the alkali solution Sulfate and 0.2g modifier, the silicate is sodium silicate, the modifier is urea, the sulfite is sodium sulfite, and stirred for 3 minutes, the temperature is 80-96 ° C, Obtain a preliminary mixed solution; then add 15 g of soybean derivatives to the preliminary mixed solution, the soybean derivatives are soybean protein isolate, stir for 10 minutes, and the temperature is 80 ° C, so that the soybean protein isolate is fully dispersed in the solution, and a mixed mixture is obtained. solution; then add 0.3g, the aqueous solution of curing agent polyamide polyamine-epichlorohydrin (PAE) with a mass concentration of 12.5%, stir for 10 minutes to obtain a solidified mixed solution; then add acid, the acid is 0.1 mass Phosphoric acid with a concentration of 35% was stirred for 5 minutes to obtain an adjustment solution with a pH value of 6; then 10 g of water-based acrylic resin was added to the adjustment mixture and stirred for 20 minutes to obtain an adjustment mixture. Finally, 0.1 g of insect repellant and 1 g of filler were added to the adjusted mixture, the insect repellent was cypermethrin, and the filler was kaolin, stirred for 10 minutes, poured out to prepare modified soybean gum.

Manufacture of solid wood composite flooring: apply the modified soybean glue produced above on the wood veneer of the present invention, and then assemble the blanks in such a way that the wood texture directions of two adjacent wood veneer layers are perpendicular to each other, and the assembled wood The veneer is first cold-pressed and then hot-pressed to obtain a slab. The cold-pressing pressure is 0.8Mpa, and the cold-pressing time is 60min; the hot-pressing pressure is 0.8Mpa, the hot-pressing temperature is 110°C, and the hot-pressing rate is 0.7min. /mm; the above-mentioned slab is trimmed, and then sanded to obtain a substrate layer; then the isocyanate glue is coated on the two outer surfaces of the above-mentioned substrate layer, and then the decorative layer and the balance layer are respectively pasted on the two outer surfaces of the substrate layer, and then hot-press the laminated plates after cold-pressing, the pressure during cold-pressing is 0.8Mpa, and the cold-pressing time is 60min; the pressure during hot-pressing is 0.8Mpa, The hot-pressing temperature is 110°C, and the hot-pressing rate is 0.7min/mm; then, the above board is subjected to curing treatment, and after the curing treatment, it is sanded, and then openings are made on the four sides for installation, and finally painted, and the solid wood is obtained Laminate floors.

Example 2

With embodiment 1, difference is that described alkali is calcium hydroxide; Described silicate is potassium silicate; Described acid is oxalic acid; Described pyrethroid insect repellant is fenvalerate and permethrin; The filler is flour; the soybean derivative is soybean protein powder.

Example 3

With embodiment 1, difference is that described alkali is calcium hydroxide; Described silicate is sodium silicate; Described acid is oxalic acid; Described pyrethroid insect repellant is fenvalerate, bifenthrin and phenthrin; the filler is diatomaceous earth bentonite; the soybean derivative is soybean protein powder.

Example 4

Add 5g of alkali and 100g of water in a three-neck round bottom flask, the alkali is sodium hydroxide, stir for 6 minutes to dissolve the sodium hydroxide, then add 2g of silicate, 2g of sulfite and 2g of modified agent, the silicate is sodium silicate, the modifier is urea, the sulfite is sodium sulfite, and stirred for 6 minutes at a temperature of 90°C to obtain a preliminary mixed solution; Add 25g soybean derivatives to the preliminary mixed solution, the soybean derivatives are soybean protein isolate, stir for 30 minutes, and the temperature is 90°C, so that the soybean protein isolate is fully dispersed in the solution to obtain a mixed solution; then add 3g, the mass concentration is 12.5% aqueous solution of curing agent polyamide polyamine-epichlorohydrin (PAE), stirred for 30 minutes to obtain a solidified mixed solution; then add acid, the acid is 2g of phosphoric acid with a mass concentration of 35%, stirred for 7 minutes , to obtain an adjustment solution with a pH value of 7; then add 15 g of water-based acrylic resin to the adjustment mixture, and stir for 30 minutes to obtain an adjustment mixture. Finally, 1 g of insect repellant and 5 g of filler were added to the adjusted mixture, the insect repellent was cypermethrin, and the filler was kaolin, stirred for 20 minutes, poured out and prepared modified soybean gum.

Manufacture of solid wood composite flooring: apply the modified soybean glue produced above on the wood veneer of the present invention, and then assemble the blanks in such a way that the wood texture directions of two adjacent wood veneer layers are perpendicular to each other, and the assembled wood The veneer is firstly cold-pressed and then hot-pressed to obtain a slab. The cold-pressing pressure is 0.8-1.2Mpa, and the cold-pressing time is 60-120min; the hot-pressing pressure is 0.8-1.2Mpa, and the hot-pressing temperature is 110-140 ℃, the hot pressing rate is 0.7-1.3min/mm; the above-mentioned slab is trimmed, and then sanded to obtain a substrate layer; then melamine glue is coated on the two outer surfaces of the above-mentioned substrate layer, and then Paste the decorative layer and the balance layer on the two outer surfaces of the substrate layer respectively, and then cold-press and then hot-press the laminated boards. The pressure during cold pressing is 0.1.0a, and the cold pressing time is 90min ; The pressure during the hot pressing is 1.0Mpa, the hot pressing temperature is 125°C, and the hot pressing rate is 1.0min/mm; then the above board is subjected to health treatment, after the health treatment, sanding treatment is carried out, and then four sides are opened for The grooves are installed and finally painted to give parquet.

Example 5

With embodiment 4, difference is that described alkali is calcium hydroxide; Described silicate is potassium silicate; Described acid is oxalic acid; Described pyrethroid insect repellant is fenvalerate and permethrin; The filler is flour; the soybean derivative is soybean protein powder.

Example 6

With embodiment 4, difference is that described alkali is calcium hydroxide; Described silicate is sodium silicate; Described acid is oxalic acid; Described pyrethroid insect repellant is fenvalerate, bifenthrin and phenthrin; the filler is diatomaceous earth bentonite; the soybean derivative is soybean protein powder.

Example 7

Add 8g of alkali and 100g of water in a three-necked round bottom flask, the alkali is sodium hydroxide, stir for 10 minutes to dissolve the sodium hydroxide, then add 3g of silicate, 3g of sulfite and 5g of modified agent, the silicate is sodium silicate, the modifier is urea, the sulfite is sodium sulfite, and stirred for 10 minutes at a temperature of 96°C to obtain a preliminary mixed solution; then to the Add 40g of soybean derivatives to the preliminary mixed solution, the soybean derivatives are soybean protein isolate, stir for 60 minutes, and the temperature is 96°C, so that the soybean protein isolate is fully dispersed in the solution to obtain a mixed solution; then add 2.5g, the mass concentration Be the aqueous solution of 12.5% curing agent polyamide polyamine-epichlorohydrin (PAE), stir 60 minutes, obtain solidified mixed liquid; Then add acid, the mass concentration of described acid is 4g is the phosphoric acid of 35%, stir 10 Minutes to obtain a regulating solution with a pH value of 8; then add 20 g of water-based acrylic resin to the regulating mixed solution, and stir for 40 minutes to obtain a regulating mixed solution. Finally, 1.5 g of insect repellant and 10 g of filler were added to the adjusted mixture, the insect repellent was cypermethrin, and the filler was kaolin, stirred for 30 minutes, poured out to prepare modified soybean gum.

Manufacture of solid wood composite flooring: apply the modified soybean glue produced above on the wood veneer of the present invention, and then assemble the blanks in such a way that the wood texture directions of two adjacent wood veneer layers are perpendicular to each other, and the assembled wood The veneer is first cold-pressed and then hot-pressed to obtain a slab. The cold-pressing pressure is 1.2Mpa, and the cold-pressing time is 120min; the hot-pressing pressure is 1.2Mpa, the hot-pressing temperature is 140°C, and the hot-pressing rate is 1.3min. /mm; the above-mentioned slab is trimmed, and then sanded to obtain a substrate layer; then the modified soybean gum is coated on the two outer surfaces of the above-mentioned substrate layer, and then the decorative layer and the balance layer Paste on the two outer surfaces of the base material layer respectively, and then cold-press and then hot-press the bonded plates. The pressure during cold pressing is 1.2Mpa, and the cold pressing time is 120min; the pressure during hot pressing is 1.2Mpa. Mpa, the hot-pressing temperature is 140°C, and the hot-pressing rate is 1.3min/mm; then, the above board is subjected to curing treatment, sanding treatment is carried out after the curing treatment, and then grooves for installation are opened on its four sides, and finally painted, that is Get parquet.

Example 8

With embodiment 7, difference is that described alkali is calcium hydroxide; Described silicate is potassium silicate; Described acid is oxalic acid; Described pyrethroid insect repellant is fenvalerate and permethrin; The filler is flour; the soybean derivative is soybean protein powder.

Example 9

With embodiment 7, difference is that described alkali is calcium hydroxide; Described silicate is sodium silicate; Described acid is oxalic acid; Described pyrethroid insect repellant is fenvalerate, bifenthrin and phenthrin; the filler is diatomaceous earth bentonite; the soybean derivative is soybean protein powder.

Comparative example 1

With embodiment 1, difference is not to add water-based acrylic resin in the described soybean gum. It can be seen from the test results in Table 1 that the adhesive strength of soybean gum is reduced to 0.6 MPa without adding water-based acrylic resin.

Comparative example 2

With embodiment 1, difference is not to add curing agent in the described soybean gum. It can be seen from the test results in Table 1 that the adhesive strength of soybean gum is reduced to 0.7 MPa without adding curing agent.

Comparative example 3

With embodiment 1, difference is that no modifying agent is added in the described soybean gum. It can be seen from the test results in Table 1 that the adhesive strength of soybean gum is reduced to 0.3 MPa without adding curing agent.

Comparative example 4

The PUR adhesive used in Patent Publication No. 202509731U (2012-10-31) is used.

With above-mentioned embodiment and comparative example: eucalyptus veneer is through gluing, aging, cold pressing, hot pressing and cutting process make three-layer eucalyptus plywood, glue amount is 400g/m ² (double-sided), cold pressing Process: pressure 1.0MPa, time 1h; hot pressing process: temperature 120°C, pressure 1.0MPa, time 60s/mm. According to GB/T 17657-1999 "Test Methods for Physical and Chemical Properties of Wood-Based Panels and Finished Wood-based Panels", the three-layer plywood was tested for bonding strength and formaldehyde emission; Samples of the same size were put into a petri dish with the same number of termites cultured, and after 24 hours of cultivation, the number of termites survived in the petri dish was detected and the death rate of the termites was calculated. The specific test results are shown in Table 1:

Table 1 embodiment and comparative example experimental test result

As can be seen from the test data in Table 1, the soybean gum produced by the embodiment of the present invention is much higher than the comparative example in terms of bonding strength and insect-proof rate; in addition, it can be seen from the comparative example that the curing agent polyamide polyamine-epichlorohydrin (PAE ), the addition of water-based acrylic resin and modifier can significantly improve the bonding strength of soybean gum. From Comparative Example 4, it can be seen that the addition of pyrethroid insect repellents in the soybean gum prepared in the embodiment of the present invention thoroughly solved the problem that the board was easily eroded by termites and silverfish, prolonging the service life of the board, and the formaldehyde emission was far lower than that of Comparative example 4.

Claims (10)

1. A solid wood composite floor, which comprises from top to bottom: a paint layer, a decorative layer, a substrate layer and a balance layer, characterized in that: the substrate layer comprises a wood veneer layer and is coated on the wood A modified soybean glue layer between the veneer layers; an isocyanate glue layer or a melamine glue layer or a modified soybean glue layer is coated between the base material layer and the decoration layer, and between the base material layer and the balance layer. 2. a kind of solid wood composite floor as claimed in claim 1, is characterized in that: described modified soybean glue layer comprises the raw material of following mass parts: 100 parts of water; 15-40 servings of soybean derivatives; Alkali 3-8 parts; Silicate 0.5-3 parts; Modifier 0.2-5 parts; Curing agent 0.3-2.5 parts; Acid 0.1-4 parts; Water-based acrylic resin 0.1-20 parts; Insect repellent 0.1-1.5 parts; Filling 1-10 parts. 3. A kind of solid wood composite floor as claimed in claim 2, is characterized in that: it comprises the raw material of following mass parts: 100 parts of water; 20-30 servings of soybean derivatives; Alkali 4-6 parts; Silicate 2-3 parts; Modifier 3-5 parts; Curing agent 0.3-2.5 parts; Sour 2-4 parts; Water-based acrylic resin 10-15 parts; Insect repellant 1-1.5 copies; Filling 5-8 parts. 4. A solid wood composite floor as claimed in claim 3, characterized in that: the modifying agent is urea. 5. A solid wood composite floor as claimed in claim 4, characterized in that it further comprises 0.5-3 parts by mass of sulfite. 6. A solid wood composite floor as claimed in claim 5, characterized in that: the curing agent is polyamide polyamine-epichlorohydrin. 7 . A solid wood composite floor as claimed in claim 6 , wherein the insect repellant is at least one of cypermethrin, fenvalerate, permethrin, bifenthrin and cypermethrin. 8. A method for manufacturing a solid wood composite floor as claimed in claims 4 to 7, characterized in that: it comprises the following steps in sequence: a) Making modified soybean gum: mix alkali and water into lye, then add silicate, sulfite and modifier to the lye, stir for 3-10 minutes, and control the temperature at 80-96°C to obtain Preliminarily mix the solution, then add soybean derivatives to the preliminary mixed solution, stir for 10-60 minutes, and control the temperature at 80-96°C to obtain a mixed solution, then add a curing agent to the mixed solution, stir for 10-60 minutes Minutes to obtain a solidified mixed solution, add acid to the solidified mixed solution, stir for 5-10 minutes, obtain a regulating solution with a pH value of 6-8, then add water-based acrylic resin to the regulating mixed solution, and stir for 20- After 40 minutes, the adjusted mixed solution is obtained; finally, insect repellent and filler are added to the adjusted mixed solution, and stirred for 10-30 minutes. b) coating the above-mentioned modified soybean glue on the wood veneer, and then forming a blank according to the direction of the wood texture of two adjacent wood veneer layers perpendicular to each other; c) forming the above-mentioned wooden veneer First cold pressing and then hot pressing to obtain a slab; d) trimming the above slab, and then sanding to obtain a substrate layer; e) coating isocyanate glue, melamine glue or modified soybean glue on the above substrate On the two outer surfaces of the layer, the decorative layer and the balance layer are respectively pasted on the two outer surfaces of the base material layer, and then the laminated plates are first cold-pressed and then hot-pressed; f) the above-mentioned plates are Carry out curing treatment, carry out sanding treatment after curing treatment, then open grooves for installation on its four sides, and finally paint, and obtain solid wood composite flooring. 9. A method for manufacturing a solid wood composite floor as claimed in claim 8, characterized in that: in step c), the pressure during the cold pressing is 0.8 to 1.2 Mpa, and the cold pressing time is 60 to 120 min; the hot pressing The hourly pressure is 0.8-1.2Mpa, the hot-pressing temperature is 110-140°C, and the hot-pressing rate is 0.7-1.3min/mm. 10. A method for manufacturing solid wood composite flooring as claimed in claim 9, characterized in that: in step e), the pressure during the cold pressing is 0.8 to 1.2 Mpa, and the cold pressing time is 60 to 120 minutes; the hot pressing The hourly pressure is 0.8-1.2Mpa, the hot-pressing temperature is 110-140°C, and the hot-pressing rate is 0.7-1.3min/mm.