CN113622218B - Melamine resin, impregnated paper and triamine sheet having sound insulation function - Google Patents
Melamine resin, impregnated paper and triamine sheet having sound insulation function Download PDFInfo
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- CN113622218B CN113622218B CN202110761022.XA CN202110761022A CN113622218B CN 113622218 B CN113622218 B CN 113622218B CN 202110761022 A CN202110761022 A CN 202110761022A CN 113622218 B CN113622218 B CN 113622218B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
- D21H17/51—Triazines, e.g. melamine
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Abstract
The invention discloses melamine resin with a sound insulation function, which comprises the following raw materials: melamine, formaldehyde solution, caprolactam, diethylene glycol, water, basalt fiber, foamed aluminum, triethanolamine and polyethylene glycol; also discloses an impregnated paper, the structure of which is from bottom to top: a melamine resin layer with sound insulation function, parchment paper and a melamine resin layer with sound insulation function; also discloses a triamine plate, the structure of which is from bottom to top: melamine impregnated bond paper, impregnated paper, substrate board, impregnated paper, melamine impregnated bond paper. According to the invention, basalt fiber and aluminum foam are added into a traditional melamine resin formula, then the mixture is impregnated on parchment, and then the impregnated paper is placed between normal melamine impregnated bond paper and a base material plate, so that the triamine plate with a sound insulation function is prepared, and the parchment with a sound insulation effect is pressed on the upper surface and the lower surface of the base material plate, so that the noise intensity can be effectively weakened.
Description
Technical Field
The invention belongs to the technical field of veneer, and particularly relates to melamine resin, impregnated paper and a triamine board with a sound insulation function.
Background
Noise is an acoustic wave, and physically, refers to any irregular, discordant sound; physiologically, it means sounds harmful or not required to the human body. The intensity of noise is generally classified into several classes: 0-20dB is quite static; 20-40dB is quieter; 40-60dB is a common sound; 60-80dB is noisy; 80-100dB is noisy; exceeding 100dB is intolerable.
Noise can interfere with people's rest, sleep, interfere with speech conversations and daily social life. The continuous noise of 40dB can influence the sleep of 10% of people, and the sleep of 70dB can reach 50%; burst noise can wake 10% of people up to 40dB, and can wake 70% of people up to 60dB, and only within 35dB is an ideal sleeping environment. Noise generation prevention and noise control intensity are to be solved.
The existing triamine board generally has a sound insulation effect by changing the thickness of the base material board, and the sound insulation performance is poor.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the melamine resin, the impregnated paper and the triamine plate with the sound insulation function are provided, and the sound function material is added into the melamine resin, so that the intensity of noise can be effectively weakened, and the triamine plate has good sound insulation function.
According to one aspect of the present invention, there is provided a melamine resin having a sound insulation function, comprising the following raw materials: melamine, basalt fibers and aluminum foam.
In some embodiments of the invention, melamine is 170-200 parts, basalt fiber is 10-20 parts, and aluminum foam is 2-8 parts by weight.
In some embodiments of the present invention, the melamine resin with a soundproof function further comprises the following raw materials: formaldehyde solution, caprolactam, diethylene glycol, water, triethanolamine and polyethylene glycol.
In some embodiments of the invention, the formaldehyde solution is 180-220 parts by weight, caprolactam is 5-10 parts by weight, diethylene glycol is 5-10 parts by weight, water is 80-100 parts by weight, triethanolamine is 1-5 parts by weight, and polyethylene glycol is 1-5 parts by weight.
The invention also provides impregnated paper with a sound insulation function, which comprises the melamine resin with the sound insulation function, wherein the structure of the impregnated paper is as follows from bottom to top: a melamine resin layer with sound insulation function, a paper base layer and a melamine resin layer with sound insulation function.
In some embodiments of the invention, the paper substrate is parchment. The impregnation effect of the parchment is optimal.
In some embodiments of the present invention, the melamine resin layer having a sound insulation function has a thickness of 0.9 to 1mm.
In some embodiments of the invention, the kraft paper has a grammage of 50-60g/m 2 The thickness is 0.9-1mm.
In some embodiments of the invention, the method of making the impregnated paper comprises the steps of:
s1: adding a dedusting agent, a release agent and a curing agent into melamine resin with a sound insulation function, and stirring to obtain impregnating slurry;
s2: and (3) dipping the paper base layer into the dipping slurry, and drying to obtain the dipping paper.
In some embodiments of the present invention, in step S1, the mass ratio of the melamine resin having a sound insulation function, the dust removing agent, the mold release agent, and the curing agent is 1: (0.001-0.003): (0.0005-0.002): (0.002-0.004).
In some embodiments of the present invention, in step S2, the drying process is as follows: the paper base layer sequentially passes through four sections of ovens with the temperature of about 145 ℃, 160 ℃, 165 ℃ and 140 ℃, and the drying time of each section of oven is 6-8s.
The invention also provides a triamine board with a sound insulation function, which comprises the impregnated paper, wherein the structure of the triamine board is as follows from bottom to top: melamine impregnated bond paper, impregnated paper, substrate board, impregnated paper, melamine impregnated bond paper.
In some embodiments of the present invention, the melamine impregnated bond paper has a structure of from bottom to top: melamine resin layer, urea resin layer, printing layer, urea resin layer, melamine resin layer.
In some embodiments of the invention, the melamine resin layer has a thickness of 0.8 to 1mm, the urea resin layer has a thickness of 0.4 to 0.5mm, and the print layer has a thickness of 1.3 to 1.5mm.
In some embodiments of the present invention, the melamine resin layer is prepared as follows: adding 0.1-0.2% of penetrating agent and 0.1-0.2% of curing agent into urea-formaldehyde resin, and stirring for later use; adding 0.1-0.3% of dedusting agent, 0.1-0.2% of release agent and 0.2-0.4% of curing agent into melamine resin, and stirring for later use; the printing paper is firstly immersed in urea-formaldehyde resin, and passes through 4 sections of baking boxes at the temperature of about 135 ℃, 150 ℃, 145 ℃ and 130 ℃, and the drying time of each section of baking box is 5-7s; then the melamine resin is rolled up and down, and then passed through 5 sections of ovens with the temperature of about 135 ℃, 160 ℃, 165 ℃ and 130 ℃ and the drying time of each section of oven is 5-7s.
In some embodiments of the present invention, the pressing process of the triamine sheet is as follows: placing melamine impregnated bond paper at the lowest surface, placing impregnated paper, placing a substrate plate, placing impregnated paper, placing melamine impregnated bond paper at last, and then entering a hot press; the pressure of the hot press is 15-18MPa, the temperature of the upper steel plate is 195-200 ℃, the temperature of the lower steel plate is 190-195 ℃, and the pressing time is 25-30s.
According to a preferred embodiment of the invention, there is at least the following advantageous effect:
1. according to the invention, two acoustic functional materials, namely basalt fiber and aluminum foam, are added into a traditional melamine resin formula, then the materials are soaked on parchment, and then the soaked paper is placed between normal melamine impregnated adhesive film paper and a base material plate for pressing and pasting, so that the triamine plate with the sound insulation function is prepared, and the parchment with the sound insulation effect is pressed and pasted on the upper surface and the lower surface of the base material plate, so that the dual-layer sound absorption and sound insulation effects are realized, and the noise intensity can be effectively weakened.
2. The invention can give the triamine plate sound insulation effect and improve the crack resistance and the cold and heat cycle resistance of the triamine film on the surface of the triamine plate. The shrinkage and the expansion of the substrate plate are easy to generate due to the change of the water content of the substrate plate, so that shrinkage force and tension are generated, when the shrinkage force and the tension are concentrated to a certain area of the triamine film, the triamine film can generate phenomena of cracking, bubbling and the like, the triamine film is formed by curing melamine resin, the melamine resin belongs to thermosetting resin, if the melamine resin is not modified, the brittleness of the triamine film is high, and the phenomenon of cracking can also occur in the process of high temperature and cold and hot circulation. According to the invention, a parchment cushion layer is added between the substrate plate and the triamine film, and the cushion layer has good toughness, so that the shrinkage force and the tension force generated by the substrate plate can be uniformly dispersed on the cushion layer, and the stress transferred to the triamine film is reduced.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
Example 1
The melamine resin with the sound insulation function comprises the following raw materials in parts by weight: 180 parts of melamine, 200 parts of formaldehyde solution, 8 parts of caprolactam, 7 parts of diethylene glycol, 90 parts of water, 15 parts of basalt fiber, 3 parts of foamed aluminum, 2 parts of triethanolamine and 2 parts of polyethylene glycol. Basalt fiber: basalt ore is taken as a raw material, crushed and then heated to 1450-1500 ℃ to be melted, and is drawn into fibers through a platinum-rhodium alloy bushing, wherein the sound absorption coefficient of the basalt fibers reaches 0.99. Foam aluminum: the foam aluminum holes are connected with holes by hole edges and are mutually communicated, and the air permeability is good, so that the foam aluminum has good heat exchange and heat dissipation capacity, sound absorption capacity and filtering and separating capacity. Polyethylene glycol can improve the crosslinking density of the resin and the crack resistance of the resin.
Physical and chemical indexes of the melamine resin having the sound insulation function are shown in table 1.
TABLE 1
| PH | Viscosity (25 ℃ C.) | Solid content | Density of | Water count (20 ℃ C.) | Free formaldehyde% | |
| Index (I) | 8.9—9.6 | 16 seconds to 18 seconds | 53-55 | 1.230-1.240 | 1.6-1.9 | 0.2-0.3 |
Impregnated paper with sound insulation function, and the structure of the impregnated paper is as follows from bottom to top: melamine resin layer with sound insulation function, parchment paper, melamine resin layer with sound insulation function, thickness of melamine resin layer with sound insulation function is 1mm, gram weight of parchment paper is 55g/m 2 The thickness is 1mm; the preparation method of the impregnated paper comprises the following steps:
s1: adding 0.2% of dedusting agent, 0.1% of release agent and 0.3% of curing agent into melamine resin with sound insulation function, stirring to obtain impregnating slurry, wherein the dedusting agent is ethylene bisstearamide, the release agent is low molecular weight polyethylene, and the curing agent is p-toluenesulfonic acid: morphins: water = 1:2:3 (mass ratio);
s2: and (3) immersing the parchment paper into the impregnating slurry, and sequentially passing through four sections of ovens with the temperature of 145 ℃, 160 ℃, 165 ℃ and 140 ℃ and the drying time of each section of oven being 7.2s, thus obtaining the impregnated paper.
A triamine board with sound insulation function comprises the following structures from bottom to top: melamine impregnated bond paper, impregnated paper, substrate board, impregnated paper, melamine impregnated bond paper, wherein the structure of the melamine impregnated bond paper is from bottom to top: the printing layer comprises a melamine resin layer, a urea resin layer, a printing layer, a urea resin layer and a melamine resin layer, wherein the thickness of the melamine resin layer is 0.9mm, the thickness of the urea resin layer is 0.5mm, and the thickness of the printing layer is 1.4mm; the melamine resin layer is composed of the following raw materials in parts by weight: 180 parts of melamine, 200 parts of formaldehyde solution, 8 parts of caprolactam, 7 parts of diethylene glycol, 90 parts of water, 2 parts of triethanolamine and 2 parts of polyethylene glycol; the preparation method of the melamine impregnated bond paper comprises the following steps: adding 0.1% of penetrating agent and 0.1% of curing agent into urea-formaldehyde resin, and stirring for later use; adding 0.2% of dedusting agent, 0.1% of release agent and 0.3% of curing agent into melamine resin, and stirring for later use; the printing paper is firstly immersed in urea-formaldehyde resin, and passes through 4 sections of baking boxes with the temperature of 135 ℃, 150 ℃, 145 ℃ and 130 ℃, and the drying time of each section of baking box is 6s; then the melamine resin is rolled up and down, and then passed through 5 sections of ovens with the temperature of 135 ℃, 160 ℃, 165 ℃ and 130 ℃ and the drying time of each section of oven is 6s. The pressing and pasting procedure of the triamine plate is as follows: placing melamine impregnated bond paper at the lowest surface, placing impregnated paper, placing a substrate plate, placing impregnated paper, placing melamine impregnated bond paper at last, and then entering a hot press; the pressure of the hot press is 17MPa, the temperature of the upper steel plate is 200 ℃, the temperature of the lower steel plate is 195 ℃, and the pressing time is 28s.
Example 2
The difference from example 1 is that the amounts of basalt fiber and aluminum foam are different, specifically 10 parts of basalt fiber and 3 parts of aluminum foam.
Example 3
The difference from example 1 is that the amounts of basalt fiber and aluminum foam are different, specifically 15 parts of basalt fiber and 8 parts of aluminum foam.
Test examples
1. Sound insulation test
Method 1: the triamine sheets of examples 1 to 3 were subjected to a soundproof test, and soundproof evaluation was performed in the following manner, and the results are shown in table 1.
(1) First-order: the sound insulation effect is poor, the objective average sound insulation amount is below 30 dB, but the normal talking sound of the partition wall can be heard clearly, and the talking content is easy to know.
(2) And (2) second-stage: the general sound-insulating effect is quite clear if a loud conversation can be heard at 30-35 db, and normal conversations can be heard but are not understood.
(3) Three stages: the normal sound-insulating effect is audible if a loud conversation is heard, but not as clear, at 35-40 db, and is also very weak when a normal conversation is heard.
(4) Four stages: with good sound insulation effect, if the sound is heard about in 40-45 dB, the user cannot know the meaning of the sound, and the user cannot hear the sound normally.
(5) Five stages: good sound insulation effect, if the loud talking is not heard at 45-50 dB, the loud shouting and the maximum sound of the radio can be only heard slightly.
(6) Six stages: excellent sound insulation effect, if the loud sound is not heard under 50-55 dB, the maximum sound of the radio is not heard.
TABLE 1
| Example 1 | Example 2 | Example 3 | |
| Grade | Grade 6 | Grade 5 | Grade 6 |
Method 2: the triamine sheets of examples 1 to 3 were subjected to a soundproof test and subjected to soundproof evaluation according to the section 5.1.2 of GB/T50121-2005 building soundproof evaluation Standard, and the results are shown in Table 2.
TABLE 2
| Example 1 | Example 2 | Example 3 | |
| Grade | Level 8 | Grade 6 | Level 8 |
It can be seen from tables 1 and 2 that the addition amount of the soundproof material is proportional to the soundproof effect, but the soundproof material is not as good as the above, and the resin viscosity is increased due to the excessive soundproof material, so that the parchment paper is not easily impregnated.
2. Crack resistance test
The method comprises the following steps: and (3) putting the product into a blast drying oven with the temperature of 70+/-2 ℃ for heating treatment for 24 hours, then taking out the product, and placing the product in an environment with the temperature of 23+/-2 ℃ and the relative humidity of 50+/-5% for 24 hours. Under natural light, the surface condition of the product is observed from any angle by using normal vision, and under illumination equipment with illumination of 800-1000lx, the surface condition of the product is observed, and the crack resistance judgment basis is as follows:
5 stages: observing the surface of the glass with a 6-fold magnifying glass to avoid cracks;
4 stages: observing the single fine cracks by using a six-time magnifying glass;
3 stages: observing the whole surface with a 6-time magnifying glass to obtain micro cracks which are randomly distributed;
2 stages: in addition to the 3-level defects, cracks with a length of less than 25mm can be observed with naked eyes;
stage 1: the cracks are spread over the entire surface.
Conclusion: the triamine sheets of examples 1-3 were subjected to a crack resistance test, and observed with a 6-fold magnifying glass, the surfaces of the products were observed to be crack-free, i.e., the crack resistance grades were all 5. The invention is characterized in that a parchment cushion layer is added between the base material plate and the triamine film, the cushion layer has good toughness, and the shrinkage force and the tension force generated by the base material plate can be uniformly dispersed on the cushion layer to reduce the stress transferred to the triamine film, so that the triamine film on the surface of the triamine plate has good crack resistance.
3. Cold and hot cycle test
The method comprises the following steps: the surface of the product is wiped clean by dipping a little ethanol with absorbent gauze, the product is placed in a drying oven with the temperature of 80+/-2 ℃ for 120+/-10 min, then the product is treated in a refrigerator with the temperature of-20+/-3 ℃ for 120+/-10 min as one period, after four periods of circulation, the product is placed for more than 1h at room temperature, and whether cracks or bubbles exist on the surface of the product is observed.
Conclusion: the triamine sheets of examples 1-3 were subjected to a cold and hot cycle test, and no cracks and no bubbling were observed on the surface of the product.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (6)
1. The triamine board with the sound insulation function is characterized in that the structure of the triamine board is that: melamine impregnated bond paper, impregnated paper, substrate board, impregnated paper, melamine impregnated bond paper; the structure of the impregnated paper is as follows from bottom to top: the paper-based composite board comprises a melamine resin layer with a sound insulation function, a paper base layer and a melamine resin layer with a sound insulation function, wherein the paper base layer is parchment; the melamine resin layer with the sound insulation function comprises the following raw materials: melamine, basalt fiber, foamed aluminum, formaldehyde solution, caprolactam, diethylene glycol, water, triethanolamine and polyethylene glycol; 170-200 parts of melamine, 10-20 parts of basalt fiber, 2-8 parts of foamed aluminum, 180-220 parts of formaldehyde solution, 5-10 parts of caprolactam, 5-10 parts of diethylene glycol, 80-100 parts of water, 1-5 parts of triethanolamine and 1-5 parts of polyethylene glycol.
2. The triamine sheet according to claim 1, wherein the melamine resin layer having a sound insulation function has a thickness of 0.9 to 1mm.
3. The triamine sheet according to claim 1, characterized in that the preparation method of the impregnated paper comprises the steps of:
s1: adding a dedusting agent, a release agent and a curing agent into melamine resin with a sound insulation function, and stirring to obtain impregnating slurry;
s2: and (3) dipping the paper base layer into the dipping slurry, and drying to obtain the dipping paper.
4. A triamine sheet according to claim 3, wherein in step S1, the mass ratio of the melamine resin having a sound insulation function, the dedusting agent, the releasing agent and the curing agent is 1: (0.001-0.003): (0.0005-0.002): (0.002-0.004).
5. A triamine sheet according to claim 3, characterized in that in step S2, the drying process is as follows: the paper base layer sequentially passes through four sections of ovens with the temperature of 145 ℃, 160 ℃, 165 ℃ and 140 ℃ and the drying time of each section of oven is 6-8s.
6. The triamine sheet according to claim 1, wherein the melamine impregnated bond paper has a structure of from bottom to top: melamine resin layer, urea resin layer, printing layer, urea resin layer, melamine resin layer.
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