阅读说明：本技术 一种低毒防水均质刨花板 (Low-toxicity waterproof homogeneous shaving board ) 是由 王金龙 符连其 于文吉 张雅慧 李长贵 何明明 祝荣先 于 2021-08-06 设计创作，主要内容包括：本发明提供一种低毒防水均质刨花板。所述低毒防水均质刨花板,包括：装饰表层、第一胶粘层、第一芯层、第二胶粘层、第二芯层、防水层。本发明提供一种低毒防水均质刨花板,该刨花板主要由装饰表层、第一胶粘层、第一芯层、第二胶粘层、第二芯层以及防水层组成,同时具有良优越的防水性、抗压强度,其中第一胶粘层、第二胶粘层均采用改性的石油树脂水性胶粘剂,其内部没有甲醛成分,在使用时不会产生甲醛有害气体,进而不会对周围造成污染,更不会危害人们的身体健康,大大降低了刨花板的毒性,使其更加环保,而改性后的石油树脂水性胶粘剂,其粘度和稳定性更好,在长时间使用时候,粘度下降程度缓慢,进而保持刨花板能够结构稳定。(The invention provides a low-toxicity waterproof homogeneous shaving board. The low-toxicity waterproof homogeneous shaving board comprises: the decorative surface layer, the first adhesive layer, the first core layer, the second adhesive layer, the second core layer and the waterproof layer. The invention provides a low-toxicity waterproof homogeneous shaving board which mainly comprises a decorative surface layer, a first adhesive layer, a first core layer, a second adhesive layer, a second core layer and a waterproof layer, and has excellent waterproofness and compressive strength.)

1. A low-toxicity waterproof homogeneous shaving board, comprising:

the decorative surface layer, the first adhesive layer, the first core layer, the second adhesive layer, the second core layer and the waterproof layer;

the decorative surface layer is arranged on the outer surface of the decorative base plate, the first adhesive layer is arranged at the bottom of the decorative surface layer, the first core layer is arranged at the bottom of the first adhesive layer, the second adhesive layer is arranged at the bottom of the first core layer, and the waterproof layer is arranged at the bottom of the second core layer.

2. The low-toxicity waterproof homogeneous shaving board according to claim 1, wherein the waterproof layer is paraffin emulsion, and the paraffin emulsion is composed of paraffin, defoamer, stearic acid, deionized water, ammonia water, sodium tripolyphosphate and hydroxymethyl cellulose.

3. The low-toxicity waterproof homogeneous shaving board according to claim 1, wherein the first core layer and the second core layer are shaving boards, the shaving boards are composed of wood raw materials, bamboo fiber raw materials, protein powder and calcium powder, and the mass ratio of the wood raw materials, the bamboo fiber raw materials, the protein powder and the calcium powder is 2: 1.5: 0.8: 0.2.

4. the low-toxicity waterproof homogeneous shaving board according to claim 1, wherein the waterproof layers of the decorative surface layer, the first adhesive layer, the first core layer, the second adhesive layer and the second core layer have a thickness ratio of 1: 0.2: 1: 0.3: 1.5: 0.5.

5. the low-toxicity waterproof homogeneous shaving board according to claim 1, wherein the first adhesive layer 2 and the second adhesive layer 4 are both modified petroleum resin aqueous adhesives, and the petroleum resin aqueous adhesives comprise the following components in parts by weight:

50-70 parts of petroleum resin, 30-40 parts of vinyl acetate, 30-50 parts of deionized water, 15-25 parts of melamine, 10-16 parts of polyvinyl alcohol, 10-18 parts of sodium hydroxide aqueous solution, 0.05-0.09 part of diatomite, 4-8 parts of colloid protective agent, 2-6 parts of emulsifier and 0.2-0.5 part of activator.

6. The low-toxicity waterproof homogeneous shaving board according to claim 5, wherein the preparation method of the modified petroleum resin aqueous adhesive comprises the following steps:

s1, weighing petroleum resin, vinyl acetate, deionized water, melamine, polyvinyl alcohol, sodium hydroxide aqueous solution, colloid protective agent, emulsifier and activator according to the raw material formula for later use;

s2, heating the petroleum resin in a water bath to 40-50 ℃, stopping heating, adding half of vinyl acetate, stirring the solution, continuing heating to 70-80 ℃, stopping heating, adding the remaining half of vinyl acetate and deionized water, continuously stirring for 15-20 minutes, and cooling to obtain a solution A;

s3, mixing melamine and polyvinyl alcohol, heating to 60-70 ℃, stopping heating, naturally heating to 85-90 ℃, keeping the temperature for 10 minutes, adding a sodium hydroxide aqueous solution, adjusting the pH value of the solution to 7.6-7.9, and cooling to obtain a solution B;

s4, mixing the solution A and the solution B, continuously stirring for 20-30 minutes by using a stirring device, then adding a colloid protective agent, an emulsifier and diatomite, continuously stirring for 10-15 minutes, then putting the mixture into a vacuum concentration device for concentration for 2-3 hours to enable the viscosity of the solution to reach 50-55 seconds, and filtering to obtain a mixed solution;

s5, heating the mixed solution in a water bath to 35-40 ℃, slowly dripping the active agent, simultaneously stirring the mixed solution until the temperature rises to 60-65 ℃, stopping heating, then adding a sodium hydroxide aqueous solution when the temperature of the mixed solution is reduced to 20-25 ℃, adjusting the pH value of the solution to 7.2-7.5, and finally obtaining the target product.

7. The low toxicity waterproof homogeneous shaving board according to claim 6, wherein the stirring in S2 is performed by an electric stirrer, and the first rotation speed of the stirrer is set to 50-60 rpm, and the second rotation speed is set to 80-85 rpm.

8. The low-toxicity waterproof homogeneous particle board as set forth in claim 6, wherein the solution A cooled in S2 is milky white liquid in color and has a viscosity of 120-150 degrees Centigrade.

9. The low toxicity waterproof homogeneous particle board according to claim 6, wherein the viscosity of the solution concentrated in S4 is 50-55 seconds, and the viscosity of the solution is a value measured at 25 ℃ using a paint-4 cup.

Technical Field

The invention relates to the field of shaving boards, in particular to a low-toxicity waterproof homogeneous shaving board.

Background

The particle board is also called particle board, various branches, small-diameter wood, fast-growing wood, wood chips and the like are cut into pieces with certain specifications, the pieces are dried and mixed with sizing material, hardening agent, waterproof agent and the like, and the pieces are pressed into the artificial board at certain temperature and pressure.

In the real life, the shaving board mainly used furniture is made and building industry and train, car carriage are made, because the shaving board structure is more even, and the processability is good, can process into the panel of big breadth as required, is the better raw and other materials of furniture of preparation different specifications, pattern, and along with the scientific and technological continuous progress, the function of shaving board is more and more abundant, the user demand that can be better different of satisfying people.

Among the prior art, to waterproof homogeneity shaving board, it can use a large amount of adhesives when preparing, and most adhesives all contain the formaldehyde composition on the market, consequently can have the problem of release formaldehyde, can injure the health if the content of formaldehyde is too high, there is certain relation in traditional shaving board internal stability and the viscosity of adhesive, and adhesive viscosity receives influence on every side easily, can increase viscosity decline degree too fast along with the live time, and then lead to the inside condition that the split appears of shaving board, be unfavorable for people's use.

Therefore, there is a need to provide a low-toxicity waterproof homogeneous particle board to solve the above technical problems.

Disclosure of Invention

The invention provides a low-toxicity waterproof homogeneous shaving board, which solves the problem that formaldehyde is released in waterproof homogeneous shaving boards.

In order to solve the technical problems, the invention provides a low-toxicity waterproof homogeneous shaving board, which comprises:

the decorative surface layer, the first adhesive layer, the first core layer, the second adhesive layer, the second core layer and the waterproof layer;

the decorative surface layer is arranged on the outer surface of the decorative base plate, the first adhesive layer is arranged at the bottom of the decorative surface layer, the first core layer is arranged at the bottom of the first adhesive layer, the second adhesive layer is arranged at the bottom of the first core layer, and the waterproof layer is arranged at the bottom of the second core layer.

Preferably, the waterproof layer is paraffin emulsion, and the paraffin emulsion is composed of paraffin, a defoaming agent, stearic acid, deionized water, ammonia water, sodium tripolyphosphate and hydroxymethyl cellulose.

Preferably, first sandwich layer with the second sandwich layer is the shaving board, just the shaving board comprises wooden raw materials, bamboo fiber raw materials, albumen powder and calcium powder, the mass ratio of wooden raw materials, bamboo fiber raw materials, albumen powder and calcium powder is 2: 1.5: 0.8: 0.2.

preferably, the waterproof layer thickness proportion of the decorative surface layer, the first adhesive layer, the first core layer, the second adhesive layer and the second core layer is 1: 0.2: 1: 0.3: 1.5: 0.5.

preferably, the first adhesive layer 2 and the second adhesive layer 4 are both modified petroleum resin aqueous adhesives, and the petroleum resin aqueous adhesives comprise the following components in parts by weight:

preferably, the petroleum resin water-based adhesive comprises the following components in parts by weight: 50-70 parts of petroleum resin, 30-40 parts of vinyl acetate, 30-50 parts of deionized water, 15-25 parts of melamine, 10-16 parts of polyvinyl alcohol, 10-18 parts of sodium hydroxide aqueous solution, 0.05-0.09 part of diatomite, 4-8 parts of colloid protective agent, 2-6 parts of emulsifier and 0.2-0.5 part of activator.

Preferably, the preparation method of the modified petroleum resin water-based adhesive comprises the following steps:

s1, weighing petroleum resin, vinyl acetate, deionized water, melamine, polyvinyl alcohol, sodium hydroxide aqueous solution, colloid protective agent, emulsifier and activator according to the raw material formula for later use;

s2, heating the petroleum resin in a water bath to 40-50 ℃, stopping heating, adding half of vinyl acetate, stirring the solution, continuing heating to 70-80 ℃, stopping heating, adding the remaining half of vinyl acetate and deionized water, continuously stirring for 15-20 minutes, and cooling to obtain a solution A;

s3, mixing melamine and polyvinyl alcohol, heating to 60-70 ℃, stopping heating, naturally heating to 85-90 ℃, keeping the temperature for 10 minutes, adding a sodium hydroxide aqueous solution, adjusting the pH value of the solution to 7.6-7.9, and cooling to obtain a solution B;

s4, mixing the solution A and the solution B, continuously stirring for 20-30 minutes by using a stirring device, then adding a colloid protective agent, an emulsifier and diatomite, continuously stirring for 10-15 minutes, then putting the mixture into a vacuum concentration device for concentration for 2-3 hours to enable the viscosity of the solution to reach 50-55 seconds, and filtering to obtain a mixed solution;

s5, heating the mixed solution in a water bath to 35-40 ℃, slowly dripping the active agent, simultaneously stirring the mixed solution until the temperature rises to 60-65 ℃, stopping heating, then adding a sodium hydroxide aqueous solution when the temperature of the mixed solution is reduced to 20-25 ℃, adjusting the pH value of the solution to 7.2-7.5, and finally obtaining the target product.

Preferably, in the step S2, the solution is stirred by an electronic stirrer, and the first rotation speed of the stirrer is set to 50-60 rpm, and the second rotation speed is set to 80-85 rpm.

Preferably, the solution a cooled in S2 should have a milky liquid color and a viscosity of 120-150 poises.

Preferably, the viscosity of the solution concentrated in S4 is 50 to 55 seconds, and the viscosity of the solution is measured at 25 ℃ using a paint-4 cup.

Compared with the related technology, the low-toxicity waterproof homogeneous shaving board provided by the invention has the following beneficial effects:

the invention provides a low-toxicity waterproof homogeneous shaving board, which mainly comprises a decorative surface layer, a first adhesive layer, a first core layer, a second adhesive layer, a second core layer and a waterproof layer, and has excellent waterproofness and compressive strength, wherein the first adhesive layer and the second adhesive layer both adopt modified petroleum resin aqueous adhesive, and have no formaldehyde component inside, so that no formaldehyde harmful gas is generated during use, further no pollution is caused to the surrounding, the health of people is not harmed, the toxicity of the shaving board is greatly reduced, the shaving board is more environment-friendly, the modified petroleum resin aqueous adhesive has better viscosity and stability, the viscosity is slowly reduced during long-time use, the shaving board can be kept stable in structure, the cracking or loosening condition is avoided, and the shaving board can be ensured to have good compressive strength by the two core layers, after long-time use, the material cannot be easily deformed, and further the use requirements of people are better met.

Drawings

Fig. 1 is a schematic structural view of a low-toxicity waterproof homogeneous particle board provided by the invention.

Reference numerals in the figures

1. The decorative surface layer comprises a decorative surface layer, 2, a first adhesive layer, 3, a first core layer, 4, a second adhesive layer, 5, a second core layer, 6 and a waterproof layer.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

First embodiment

Referring to fig. 1, fig. 1 is a schematic structural diagram of a low-toxicity waterproof homogeneous particle board according to the present invention. A low-toxicity waterproof homogeneous shaving board comprising: the decorative surface layer 1, the first adhesive layer 2, the first core layer 3, the second adhesive layer 4, the second core layer 5 and the waterproof layer 6;

the first adhesive layer 2 is arranged at the bottom of the decorative surface layer 1, the first core layer 3 is arranged at the bottom of the first adhesive layer 2, the second adhesive layer 4 is arranged at the bottom of the first core layer 3, and the waterproof layer 6 is arranged at the bottom of the second core layer 5.

The waterproof layer is paraffin emulsion, and the paraffin emulsion is composed of paraffin, a defoaming agent, stearic acid, deionized water, ammonia water, sodium tripolyphosphate and hydroxymethyl cellulose.

First sandwich 3 with second sandwich 5 is the shaving board, just the shaving board comprises wooden raw materials, bamboo fiber raw materials, albumen powder and calcium powder, the mass ratio of wooden raw materials, bamboo fiber raw materials, albumen powder and calcium powder is 2: 1.5: 0.8: 0.2.

the waterproof layer thickness proportion of the decorative surface layer, the first adhesive layer, the first core layer, the second adhesive layer and the second core layer is 1: 0.2: 1: 0.3: 1.5: 0.5.

the first adhesive layer 2 and the second adhesive layer 4 are both modified petroleum resin water-based adhesives, and the petroleum resin water-based adhesives comprise the following components in parts by weight:

the petroleum resin water-based adhesive comprises the following components in parts by weight: 50 parts of petroleum resin, 30 parts of vinyl acetate, 30 parts of deionized water, 15 parts of melamine, 10 parts of polyvinyl alcohol, 10 parts of sodium hydroxide aqueous solution, 0.05 part of diatomite, 4 parts of colloid protective agent, 2 parts of emulsifier and 0.2 part of activating agent.

The preparation method of the modified petroleum resin water-based adhesive comprises the following steps:

s1, weighing petroleum resin, vinyl acetate, deionized water, melamine, polyvinyl alcohol, sodium hydroxide aqueous solution, colloid protective agent, emulsifier and activator according to the raw material formula for later use;

s2, heating the petroleum resin in a water bath to 40 ℃, stopping heating, adding half of vinyl acetate, stirring the solution, continuously heating to 70 ℃, stopping heating, adding the remaining half of vinyl acetate and deionized water, continuously stirring for 15 minutes, and cooling to obtain a solution A;

s3, mixing melamine and polyvinyl alcohol, heating to 60 ℃, stopping heating, naturally heating to 85 ℃, keeping the temperature for 10 minutes, adding a sodium hydroxide aqueous solution, adjusting the pH value of the solution to 7.6, and cooling to obtain a solution B;

s4, mixing the solution A and the solution B, continuously stirring for 20 minutes by using stirring equipment, then adding a colloid protective agent, an emulsifier and diatomite, continuously stirring for 10 minutes, then putting the mixture into vacuum concentration equipment for concentration for 2 hours to enable the viscosity of the solution to reach 50 seconds, and filtering to obtain a mixed solution;

s5, heating the mixed solution in a water bath to 35 ℃, slowly dripping the active agent, stirring the mixed solution at the same time until the temperature rises to 60 ℃, stopping heating, then adding a sodium hydroxide aqueous solution when the temperature of the mixed solution drops to 20 ℃, and adjusting the pH value of the solution to 7.2 to finally obtain the target product.

In the step S2, the solution is stirred by an electronic stirrer, and the first rotation speed of the stirrer is set to 50 rpm, and the second rotation speed is set to 80 rpm.

The solution a cooled in S2 should be milky white liquid in appearance color and have a viscosity of 120 poise.

The viscosity of the solution concentrated in S4 was 50 seconds, and the viscosity of the solution was measured at 25 ℃ using a paint-4 cup.

Second embodiment

A second embodiment of the invention provides a low toxicity waterproof homogeneous particle board based on the first embodiment of the invention, wherein the second embodiment does not prevent the independent implementation of the solution of the first embodiment.

Specifically, the difference of the invention in providing another low-toxicity waterproof homogeneous shaving board is as follows:

the petroleum resin water-based adhesive comprises the following components in parts by weight:

70 parts of petroleum resin, 40 parts of vinyl acetate, 50 parts of deionized water, 25 parts of melamine, 16 parts of polyvinyl alcohol, 18 parts of sodium hydroxide aqueous solution, 0.09 part of diatomite, 8 parts of colloid protective agent, 6 parts of emulsifier and 0.5 part of activator.

The preparation method of the modified petroleum resin water-based adhesive comprises the following steps:

s1, weighing petroleum resin, vinyl acetate, deionized water, melamine, polyvinyl alcohol, sodium hydroxide aqueous solution, colloid protective agent, emulsifier and activator according to the raw material formula for later use;

s2, heating the petroleum resin in a water bath to 50 ℃, stopping heating, adding half of vinyl acetate, stirring the solution, continuously heating to 80 ℃, stopping heating, adding the remaining half of vinyl acetate and deionized water, continuously stirring for 20 minutes, and cooling to obtain a solution A;

s3, mixing melamine and polyvinyl alcohol, heating to 70 ℃, stopping heating, naturally heating to 90 ℃, keeping the temperature for 10 minutes, adding a sodium hydroxide aqueous solution, adjusting the pH value of the solution to 7.9, and cooling to obtain a solution B;

s4, mixing the solution A and the solution B, continuously stirring for 30 minutes by using stirring equipment, then adding a colloid protective agent, an emulsifier and diatomite, continuously stirring for 15 minutes, then putting the mixture into vacuum concentration equipment for concentration for 3 hours to enable the viscosity of the solution to reach 55 seconds, and filtering to obtain a mixed solution;

and S5, heating the mixed solution in a water bath to 40 ℃, slowly dripping the active agent, stirring the mixed solution at the same time until the temperature rises to 65 ℃, stopping heating, then adding a sodium hydroxide aqueous solution when the temperature of the mixed solution drops to 25 ℃, and adjusting the pH value of the solution to 7.5 to finally obtain the target product.

In S2, the solution is stirred by an electronic stirrer, and the first rotation speed of the stirrer is set to 60 rpm, and the second rotation speed is set to 85 rpm.

The solution a cooled in S2 should be milky white liquid in appearance color and have a viscosity of 150 poise.

The viscosity of the solution concentrated in S4 was 55 seconds, and the viscosity of the solution was measured at 25 ℃ using a paint-4 cup.

Third embodiment

A second embodiment of the invention provides a low toxicity waterproof homogeneous particle board based on the first embodiment of the invention, wherein the second embodiment does not prevent the independent implementation of the solution of the first embodiment.

Specifically, the difference of the invention in providing another low-toxicity waterproof homogeneous shaving board is as follows:

the petroleum resin water-based adhesive comprises the following components in parts by weight:

60 parts of petroleum resin, 35 parts of vinyl acetate, 45 parts of deionized water, 20 parts of melamine, 13 parts of polyvinyl alcohol, 14 parts of sodium hydroxide aqueous solution, 0.07 part of diatomite, 6 parts of colloid protective agent, 4 parts of emulsifier and 0.3 part of activator.

The preparation method of the modified petroleum resin water-based adhesive comprises the following steps:

s1, weighing petroleum resin, vinyl acetate, deionized water, melamine, polyvinyl alcohol, sodium hydroxide aqueous solution, colloid protective agent, emulsifier and activator according to the raw material formula for later use;

s2, heating the petroleum resin in a water bath to 45 ℃, stopping heating, adding half of vinyl acetate, stirring the solution, continuously heating to 75 ℃, stopping heating, adding the remaining half of vinyl acetate and deionized water, continuously stirring for 18 minutes, and cooling to obtain a solution A;

s3, mixing melamine and polyvinyl alcohol, heating to 65 ℃, stopping heating, naturally heating to 85 ℃, keeping the temperature for 10 minutes, adding a sodium hydroxide aqueous solution, adjusting the pH value of the solution to 7.7, and cooling to obtain a solution B;

s4, mixing the solution A and the solution B, continuously stirring for 20 minutes by using stirring equipment, then adding a colloid protective agent, an emulsifier and diatomite, continuously stirring for 10 minutes, then putting the mixture into vacuum concentration equipment for concentration for 2.5 hours to enable the viscosity of the solution to reach 50 seconds, and filtering to obtain a mixed solution;

and S5, heating the mixed solution in a water bath to 38 ℃, slowly dripping the active agent, stirring the mixed solution at the same time until the temperature rises to 63 ℃, stopping heating, then adding a sodium hydroxide aqueous solution when the temperature of the mixed solution is reduced to 22 ℃, and adjusting the pH value of the solution to 7.3 to finally obtain the target product.

In S2, the solution is stirred by an electronic stirrer, and the first rotation speed of the stirrer is 55 rpm, and the second rotation speed is 83 rpm.

The solution a cooled in S2 should be milky white liquid in appearance color and have a viscosity of 130 poise.

The viscosity of the solution concentrated in S4 was 52 seconds, and the viscosity of the solution was measured at 25 ℃ using a paint-4 cup.

Fourth embodiment

A second embodiment of the invention provides a low toxicity waterproof homogeneous particle board based on the first embodiment of the invention, wherein the second embodiment does not prevent the independent implementation of the solution of the first embodiment.

Specifically, the difference of the invention in providing another low-toxicity waterproof homogeneous shaving board is as follows:

the petroleum resin water-based adhesive comprises the following components in parts by weight:

50 parts of petroleum resin, 40 parts of vinyl acetate, 30 parts of deionized water, 25 parts of melamine, 10 parts of polyvinyl alcohol, 18 parts of sodium hydroxide aqueous solution, 0.05 part of diatomite, 8 parts of colloid protective agent, 2 parts of emulsifier and 0.5 part of activator.

The preparation method of the modified petroleum resin water-based adhesive comprises the following steps:

s1, weighing petroleum resin, vinyl acetate, deionized water, melamine, polyvinyl alcohol, sodium hydroxide aqueous solution, colloid protective agent, emulsifier and activator according to the raw material formula for later use;

s2, heating the petroleum resin in a water bath to 40 ℃, stopping heating, adding half of vinyl acetate, stirring the solution, continuously heating to 80 ℃, stopping heating, adding the remaining half of vinyl acetate and deionized water, continuously stirring for 15 minutes, and cooling to obtain a solution A;

s3, mixing melamine and polyvinyl alcohol, heating to 70 ℃, stopping heating, naturally heating to 85 ℃, keeping the temperature for 10 minutes, adding a sodium hydroxide aqueous solution, adjusting the pH value of the solution to 7.6, and cooling to obtain a solution B;

s4, mixing the solution A and the solution B, continuously stirring for 20 minutes by using stirring equipment, then adding a colloid protective agent, an emulsifier and diatomite, continuously stirring for 15 minutes, then putting the mixture into vacuum concentration equipment for concentration for 2 hours to enable the viscosity of the solution to reach 55 seconds, and filtering to obtain a mixed solution;

s5, heating the mixed solution in a water bath to 35 ℃, slowly dripping the active agent, stirring the mixed solution at the same time until the temperature rises to 65 ℃, stopping heating, then adding a sodium hydroxide aqueous solution when the temperature of the mixed solution drops to 20 ℃, and adjusting the pH value of the solution to 7.2 to finally obtain the target product.

In S2, the solution is stirred by an electronic stirrer, and the first rotation speed of the stirrer is set to 50 rpm, and the second rotation speed is set to 85 rpm.

The solution a cooled in S2 should be milky white liquid in appearance color and have a viscosity of 120 poise.

The viscosity of the solution concentrated in S4 was 55 seconds, and the viscosity of the solution was measured at 25 ℃ using a paint-4 cup.

The viscosity and the concentration of harmful gases of the petroleum resin aqueous adhesives prepared in examples 1 to 4 were counted, and for comparison, the data of all examples were normalized based on the data of example 1.

TABLE 1

	Viscosity of the oil	Concentration of harmful gas
			Example 1	110 debarking	0.15mg/m3
Example 2	130 debarking	0.09mg/m3
			Example 3	115 out of the way	0.18mg/m3
Example 4	120 debarking	0.14mg/m3

As can be seen from the above table, since the viscosity and the harmful gas concentration of the petroleum resin aqueous adhesive prepared in example 2 are better than those of the other examples, the petroleum resin aqueous adhesive prepared by the method for preparing a petroleum resin aqueous adhesive given in example 2 is optimal, and thus the low-toxicity waterproof homogeneous particle board prepared by using the petroleum resin aqueous adhesive of this example is the most suitable choice.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.