Silent LVT Flooring and Production Process

Abstract

The present invention discloses a silent LVT floor and a production process, comprising: a PVC wear-resistant layer, an adhesive layer, and a base material layer which are laminated and composited; the PVC wear-resistant layer is made of the following components: PVC powder, a plasticizer, and a nano-composite material; the adhesive layer adopts: a modified polyurea adhesive; the base material layer is made of the following components: stone powder, PVC powder, and a plasticizer; the main component of the silent LVT floor prepared by the present invention is polyvinyl chloride, which is an environmentally friendly, non-toxic, renewable resource. It does not contain harmful substances such as formaldehyde. After paving, the indoor environment is formaldehyde-free and odorless, thereby ensuring the health of residents.

Description

Technical Field

[0001] The invention belongs to the technical field of flooring, in particular to a silent LVT flooring and a production process. Background Art

[0002] Flooring is a common flooring material used in home decoration, and it comes in a wide variety, each with its own unique characteristics. Solid wood flooring, also known as log flooring, is made directly from solid wood. It retains the characteristics of natural wood, such as its natural color, aroma, and texture, creating an elegant and refined finish, making it a high-end decorative material. Furthermore, solid wood flooring regulates indoor temperature by absorbing and releasing moisture, providing sound insulation and heat insulation.

[0003] However, the dwindling global forest resources have led to a tightening timber supply. Annual domestic demand for forest reserves far exceeds the logging quota, leaving a significant shortfall. It is expected that the supply of raw materials for solid wood flooring will remain tight for a considerable period of time.

[0004] With the improvement of people's living standards and the improvement of living environment requirements, the demand for wooden flooring has increased significantly. Therefore, stone plastic flooring has been increasingly used as a substitute, which can greatly alleviate the pressure on wood resources.

[0005] However, the soundproofing performance of the stone plastic floor prepared by the prior art is relatively average, which limits its application in many fields.

[0006] Therefore, the present invention solves the corresponding problems by providing a silent LVT floor. Summary of the Invention

[0007] The purpose of the present invention is to provide a silent LVT floor to solve the deficiencies in the prior art.

[0008] The technical solution adopted by the present invention is as follows:

[0009] Silent LVT flooring, including: PVC wear-resistant layer, adhesive layer, base material layer laminated and compounded;

[0010] The PVC wear-resistant layer is made of the following ingredients by weight: 50-60 parts of PVC powder, 10-15 parts of plasticizer, and 8-12 parts of nanocomposite material;

[0011] Adhesive layer adopts: modified polyurea adhesive;

[0012] The base material layer is made of the following ingredients in parts by weight: 30-35 parts of stone powder, 30-35 parts of PVC powder, and 10-12 parts of plasticizer.

[0013] As a further technical solution: the preparation method of the nanocomposite material is:

[0014] First, carbon nanotubes are uniformly dispersed in deionized water to obtain a carbon nanotube dispersion, the pH of the carbon nanotube dispersion is adjusted to 9.8, the temperature is adjusted to 80° C., and the dispersion is kept warm for later use;

[0015] Adding sodium silicate to deionized water, stirring and mixing uniformly to obtain a sodium silicate solution;

[0016] The sodium silicate solution was added dropwise to the carbon nanotube dispersion while stirring. After the addition was completed, the stirring was continued for 1 hour, and the mixture was allowed to stand for 2 hours. Then, aluminum sulfate and sodium hydroxide were added and the stirring was continued for 1 hour. Then, the pH of the system was adjusted to neutral, and the mixture was allowed to stand for 4 hours. The mixture was subjected to high-speed centrifugation for 30 minutes, filtered, washed with water, dried, calcined at high temperature, and cooled to obtain a nanocomposite material.

[0017] As a further technical solution: the mass fraction of the carbon nanotube dispersion is 20-22%;

[0018] The concentration of sodium silicate solution is 2-2.5 mol / L;

[0019] Adding the sodium silicate solution dropwise to the carbon nanotube dispersion at a silicon dioxide / carbon nanotube mass ratio of 1-1.5%;

[0020] The amount of aluminum sulfate and sodium hydroxide added is such that the mass ratio of aluminum oxide to carbon nanotubes in the control system is 3-4%;

[0021] High-speed centrifugal speed is 8000r / min;

[0022] The high temperature calcination temperature is 550-600℃ and the time is 40min.

[0023] As a further technical solution: the preparation method of the modified polyurea binder is:

[0024] First, the composite polyether polyol is added to a reaction kettle, and then isophorone diisocyanate is added to the reaction kettle, and stirred to react to obtain a prepolymer;

[0025] Add urea and bis(4-aminophenyl) disulfide to dimethylacetamide, stir and mix well to obtain an intermediate;

[0026] The intermediate was added to the prepolymer, the temperature was adjusted to 80° C., the mixture was stirred at this temperature for 30 minutes, and the mixture was cooled to room temperature to obtain a modified polyurea binder.

[0027] As a further technical solution: the molar ratio of the composite polyether polyol to isophorone diisocyanate is 3:1;

[0028] The mixing ratio of urea, bis(4-aminophenyl) disulfide, and dimethylacetamide is 10 g:4 g:100 mL;

[0029] The mixing mass ratio of the prepolymer to the intermediate is 1:5-6.

[0030] As a further technical solution: the preparation method of the composite polyether polyol is:

[0031] Add diethylene glycol to the reactor, and then add soybean oil, castor oil and water, adjust the temperature to 78°C, keep warm and stir for 30 minutes, then add sucrose, introduce nitrogen into the reactor, exhaust the air in the reactor, evacuate to 0.5Pa, then introduce dimethylamine, adjust the temperature to 98°C, and then add propylene oxide dropwise while stirring. After the addition is completed, heat to 120°C, continue stirring for 40 minutes, adjust the pressure to 0.3MPa, the temperature to 112°C, continue keeping warm and stirring for 4 hours, and then dry for 1 hour to obtain a composite polyether polyol.

[0032] As a further technical solution: the weight parts of the raw materials of the composite polyether polyol are respectively:

[0033] 5 parts of diethylene glycol, 12 parts of soybean oil, 18 parts of castor oil, 4.5 parts of water, 25.5 parts of sucrose, 1.2 parts of dimethylamine, and 51.3 parts of propylene oxide.

[0034] As a further technical solution: the plasticizer is dioctyl terephthalate.

[0035] The production process of silent LVT flooring includes: hot pressing the PVC wear-resistant layer, adhesive layer and base material layer to obtain a slab;

[0036] The slab is then cured for 12 hours, then rolled with UV paint, tempered, cured for 24 hours, and then punched, trimmed, laminated and packaged to complete.

[0037] As a further technical solution: the hot pressing temperature is 145-150°C and the pressure is 8-10MPa;

[0038] The health-preserving temperature is 25°C;

[0039] The lamination is carried out by using self-adhesive EVA film for lamination packaging.

[0040] Beneficial effects:

[0041] The main component of the silent LVT floor prepared by the present invention is polyvinyl chloride, which is an environmentally friendly, non-toxic, renewable resource. It does not contain harmful substances such as formaldehyde. After paving, the indoor environment is formaldehyde-free and odorless, ensuring the health of residents.

[0042] The surface of the silent LVT floor is a wear-resistant layer, which can improve the durability of the floor. At the same time, the silent LVT floor prepared by the present invention has good sound absorption and noise reduction functions, which can effectively reduce the echo of falling objects and walking noise, creating a quiet and comfortable indoor environment for users.

[0043] When sound waves enter the silent LVT floor, the nano-composite material will scatter the sound waves, change the direction of sound wave propagation, increase the number of reflections and refractions of sound waves inside the silent LVT floor, thereby increasing the attenuation of sound waves and enhancing the sound absorption effect.

[0044] Nanocomposites can not only fill the pores and defects inside the silent LVT flooring material, reduce the pore size, and increase the density of the silent LVT flooring, but also make the propagation path of sound waves in the silent LVT flooring more tortuous, thereby improving the sound absorption performance of the silent LVT flooring.

[0045] The nanocomposite particles prepared by the present invention can form a special interface structure with the matrix of the silent LVT floor. For example, the composite nanoparticles form nanodomains or nanophases in the silent LVT floor. These interface structures can absorb and dissipate sound wave energy.

[0046] Nanocomposite particles have a high specific surface area and surface energy, and can interact strongly with sound waves, converting the mechanical energy of sound waves into other forms of energy such as heat and dissipating it. This can further improve the sound wave absorption effect of silent LVT flooring.

[0047] The present invention uses a modified polyurea adhesive to bond the wear-resistant layer and the base material layer together, thereby greatly improving the bonding strength of the floor and improving durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a curve of sound absorption coefficient at different sound wave frequencies. DETAILED DESCRIPTION

[0049] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0050] Silent LVT flooring, including: PVC wear-resistant layer, adhesive layer, base material layer laminated and compounded;

[0051] The PVC wear-resistant layer is made of the following ingredients by weight: 50-60 parts of PVC powder, 10-15 parts of plasticizer, and 8-12 parts of nanocomposite material;

[0052] PVC powder brand: TYH-2500M;

[0053] The PVC wear-resistant layer is prepared by putting the above materials into an internal mixer, mixing them at 185°C, and then rolling them through a five-roll calender;

[0054] Adhesive layer adopts: modified polyurea adhesive;

[0055] The base material layer is made of the following ingredients by weight: 30-35 parts of stone powder, 30-35 parts of PVC powder, and 10-12 parts of plasticizer. It is mixed in an internal mixer at 185°C and then rolled in a four-roll calender.

[0056] PVC powder brand: TYH-2500M;

[0057] The stone powder particle size is 300 mesh and was purchased from Hebei Chonghuang New Material Technology Co., Ltd.

[0058] The preparation method of nanocomposite material is as follows:

[0059] First, carbon nanotubes are uniformly dispersed in deionized water to obtain a carbon nanotube dispersion, the pH of the carbon nanotube dispersion is adjusted to 9.8, the temperature is adjusted to 80° C., and the dispersion is kept warm for later use;

[0060] Adding sodium silicate to deionized water, stirring and mixing uniformly to obtain a sodium silicate solution;

[0061] The sodium silicate solution was added dropwise to the carbon nanotube dispersion while stirring. After the addition was completed, the stirring was continued for 1 hour, and the mixture was allowed to stand for 2 hours. Then, aluminum sulfate and sodium hydroxide were added and the stirring was continued for 1 hour. Then, the pH of the system was adjusted to neutral, and the mixture was allowed to stand for 4 hours. The mixture was subjected to high-speed centrifugation for 30 minutes, filtered, washed with water, dried, calcined at high temperature, and cooled to obtain a nanocomposite material.

[0062] The mass fraction of the carbon nanotube dispersion is 20-22%;

[0063] The concentration of sodium silicate solution is 2-2.5 mol / L;

[0064] Adding the sodium silicate solution dropwise to the carbon nanotube dispersion at a silicon dioxide / carbon nanotube mass ratio of 1-1.5%;

[0065] The amount of aluminum sulfate and sodium hydroxide added is such that the mass ratio of aluminum oxide to carbon nanotubes in the control system is 3-4%;

[0066] High-speed centrifugal speed is 8000r / min;

[0067] The high temperature calcination temperature is 550-600℃ and the time is 40min.

[0068] The preparation method of the modified polyurea binder is as follows:

[0069] First, the composite polyether polyol is added to a reaction kettle, and then isophorone diisocyanate is added to the reaction kettle, and stirred to react to obtain a prepolymer;

[0070] Add urea and bis(4-aminophenyl) disulfide to dimethylacetamide, stir and mix well to obtain an intermediate;

[0071] The intermediate was added to the prepolymer, the temperature was adjusted to 80° C., the mixture was stirred at this temperature for 30 minutes, and the mixture was cooled to room temperature to obtain a modified polyurea binder.

[0072] The molar ratio of the composite polyether polyol and isophorone diisocyanate is 3:1;

[0073] The mixing ratio of urea, bis(4-aminophenyl) disulfide, and dimethylacetamide is 10 g:4 g:100 mL;

[0074] The mixing mass ratio of the prepolymer to the intermediate is 1:5-6.

[0075] The preparation method of composite polyether polyol is as follows:

[0076] Add diethylene glycol to the reactor, and then add soybean oil, castor oil and water, adjust the temperature to 78°C, keep warm and stir for 30 minutes, then add sucrose, introduce nitrogen into the reactor, exhaust the air in the reactor, evacuate to 0.5Pa, then introduce dimethylamine, adjust the temperature to 98°C, and then add propylene oxide dropwise while stirring. After the addition is completed, heat to 120°C, continue stirring for 40 minutes, adjust the pressure to 0.3MPa, the temperature to 112°C, continue keeping warm and stirring for 4 hours, and then dry for 1 hour to obtain a composite polyether polyol.

[0077] The weight parts of the raw materials of the composite polyether polyol are respectively:

[0078] 5 parts of diethylene glycol, 12 parts of soybean oil, 18 parts of castor oil, 4.5 parts of water, 25.5 parts of sucrose, 1.2 parts of dimethylamine, and 51.3 parts of propylene oxide.

[0079] The plasticizer is dioctyl terephthalate.

[0080] The production process of silent LVT flooring includes: hot pressing the PVC wear-resistant layer, adhesive layer and base material layer to obtain a slab;

[0081] The slab is then cured for 12 hours, then rolled with UV paint, tempered, cured for 24 hours, and then punched, trimmed, laminated and packaged to complete.

[0082] The hot pressing temperature is 145-150℃ and the pressure is 8-10MPa;

[0083] The health-preserving temperature is 25°C;

[0084] The lamination is carried out by using self-adhesive EVA film for lamination packaging.

[0085] Wear-resistant layer thickness: 3.50±0.02mm;

[0086] The thickness of the bonding layer is 0.3±0.02mm;

[0087] Base material layer thickness 6.00±0.05mm;

[0088] UV, tempering line

[0089] UV paint quantity 20±5g / ㎡;

[0090] Tempering: The outlet temperature of the floor should be above 80℃ and the treatment time in hot water should be above 4 minutes;

[0091] Before punching and cutting: confirm that the curing time is sufficient, the physical properties meet the requirements, and the surface temperature of the material is around 25°C, otherwise punching and cutting is not allowed;

[0092] Straightness of right angle: measured with the right angle support of the assembly table, 1220 length ± 0.10mm, 1524 length ± 0.15mm;

[0093] Flatness: measured with a feeler gauge, required to be ≤0.50mm.

[0094] The following are specific embodiments

[0095] Example 1

[0096] Silent LVT flooring, including: PVC wear-resistant layer, adhesive layer, base material layer laminated and compounded;

[0097] The PVC wear-resistant layer is made of the following ingredients by weight: 50 parts of PVC powder, 10 parts of plasticizer, and 8 parts of nanocomposite material;

[0098] The PVC wear-resistant layer is prepared by putting the above materials into an internal mixer, mixing them at 185°C, and then rolling them through a five-roll calender;

[0099] Adhesive layer adopts: modified polyurea adhesive;

[0100] The base material layer is made of the following ingredients in parts by weight: 30 parts of stone powder, 30 parts of PVC powder, and 10 parts of plasticizer.

[0101] The preparation method of nanocomposite material is as follows:

[0102] First, carbon nanotubes are uniformly dispersed in deionized water to obtain a carbon nanotube dispersion, the pH of the carbon nanotube dispersion is adjusted to 9.8, the temperature is adjusted to 80° C., and the dispersion is kept warm for later use;

[0103] Adding sodium silicate to deionized water, stirring and mixing uniformly to obtain a sodium silicate solution;

[0104] The sodium silicate solution was added dropwise to the carbon nanotube dispersion while stirring. After the addition was completed, the stirring was continued for 1 hour, and the mixture was allowed to stand for 2 hours. Then, aluminum sulfate and sodium hydroxide were added and the stirring was continued for 1 hour. Then, the pH of the system was adjusted to neutral, and the mixture was allowed to stand for 4 hours. The mixture was subjected to high-speed centrifugation for 30 minutes, filtered, washed with water, dried, calcined at high temperature, and cooled to obtain a nanocomposite material.

[0105] The mass fraction of carbon nanotube dispersion is 20%;

[0106] The concentration of sodium silicate solution is 2 mol / L;

[0107] Sodium silicate solution was added dropwise to the carbon nanotube dispersion at a silicon dioxide / carbon nanotube mass ratio of 1%.

[0108] The amount of aluminum sulfate and sodium hydroxide added was such that the mass ratio of aluminum oxide to carbon nanotubes in the control system was 3%;

[0109] High-speed centrifugal speed is 8000r / min;

[0110] The high temperature calcination temperature is 550℃ and the time is 40min.

[0111] The preparation method of the modified polyurea binder is as follows:

[0112] First, the composite polyether polyol is added to a reaction kettle, and then isophorone diisocyanate is added to the reaction kettle, and stirred to react to obtain a prepolymer;

[0113] Add urea and bis(4-aminophenyl) disulfide to dimethylacetamide, stir and mix well to obtain an intermediate;

[0114] The intermediate was added to the prepolymer, the temperature was adjusted to 80° C., the mixture was stirred at this temperature for 30 minutes, and the mixture was cooled to room temperature to obtain a modified polyurea binder.

[0115] The molar ratio of the composite polyether polyol and isophorone diisocyanate is 3:1;

[0116] The mixing ratio of urea, bis(4-aminophenyl) disulfide, and dimethylacetamide is 10 g:4 g:100 mL;

[0117] The mixing mass ratio of the prepolymer and the intermediate is 1:5.

[0118] The preparation method of composite polyether polyol is as follows:

[0119] Add diethylene glycol to the reactor, and then add soybean oil, castor oil and water, adjust the temperature to 78°C, keep warm and stir for 30 minutes, then add sucrose, introduce nitrogen into the reactor, exhaust the air in the reactor, evacuate to 0.5Pa, then introduce dimethylamine, adjust the temperature to 98°C, and then add propylene oxide dropwise while stirring. After the addition is completed, heat to 120°C, continue stirring for 40 minutes, adjust the pressure to 0.3MPa, the temperature to 112°C, continue keeping warm and stirring for 4 hours, and then dry for 1 hour to obtain a composite polyether polyol.

[0120] The weight parts of the raw materials of the composite polyether polyol are respectively:

[0121] 5 parts of diethylene glycol, 12 parts of soybean oil, 18 parts of castor oil, 4.5 parts of water, 25.5 parts of sucrose, 1.2 parts of dimethylamine, and 51.3 parts of propylene oxide.

[0122] The plasticizer is dioctyl terephthalate.

[0123] The production process of silent LVT flooring includes: hot pressing the PVC wear-resistant layer, adhesive layer and base material layer to obtain a slab;

[0124] The slab is then cured for 12 hours, then rolled with UV paint, tempered, cured for 24 hours, and then punched, trimmed, laminated and packaged to complete.

[0125] The hot pressing temperature is 145°C and the pressure is 8 MPa;

[0126] The health-preserving temperature is 25°C;

[0127] The lamination is carried out by using self-adhesive EVA film for lamination packaging.

[0128] Example 2

[0129] On the basis of Example 1, the difference from Example 1 is that the PVC wear-resistant layer is made of the following components by weight: 52 parts of PVC powder, 13 parts of plasticizer, and 10 parts of nanocomposite material;

[0130] The base material layer is made of the following ingredients by weight: 32 parts of stone powder, 32 parts of PVC powder, and 11 parts of plasticizer.

[0131] Example 3

[0132] On the basis of Example 1, the difference from Example 1 is that the PVC wear-resistant layer is made of the following components by weight: 58 parts of PVC powder, 14 parts of plasticizer, and 10 parts of nanocomposite material;

[0133] The base material layer is made of the following ingredients by weight: 31 parts of stone powder, 33 parts of PVC powder, and 11 parts of plasticizer.

[0134] Example 4

[0135] On the basis of Example 1, the difference from Example 1 is that the PVC wear-resistant layer is made of the following components by weight: 60 parts of PVC powder, 15 parts of plasticizer, and 12 parts of nanocomposite material;

[0136] The base material layer is made of the following ingredients by weight: 35 parts of stone powder, 35 parts of PVC powder, and 12 parts of plasticizer.

[0137] Comparative Example 1:

[0138] On the basis of the technical solution of Example 1, the nanocomposite material is replaced by carbon nanotubes in equal amounts, and the rest of the technical solutions remain unchanged.

[0139] Comparative Example 2:

[0140] Based on the technical solution of Example 1, no composite polyether polyol is added, and the rest of the technical solutions remain unchanged.

[0141] Comparative Example 3:

[0142] On the basis of the technical solution of Example 1, the composite polyether polyol was replaced by a conventional commercially available polyether polyol (molecular weight of 4800, model number 104G), and the rest of the technical solutions remained unchanged.

[0143] test:

[0144] Mechanical properties testing

[0145] According to the national standard GB / T15104-2006 "Decorative Veneer Panels", the immersion peeling test and surface bonding strength test were carried out using a mechanical testing machine. The test results are shown in Table 1:

[0146] Table 1

[0147] Bonding strength MPa Example 1 2.54 Example 2 2.50 Example 3 2.52 Example 4 2.49 Comparative Example 1 2.36 Comparative Example 2 1.89 Comparative Example 3 2.23

[0148] It can be seen from Table 1 that the floor prepared by the present invention has excellent gluing properties.

[0149] Sound absorption performance test

[0150] The sound absorption coefficient of wood-plastic materials at various frequencies was tested in accordance with the standard GB / T18696.1-2004, "Measurement of Sound Absorption Coefficient and Acoustic Impedance in Acoustic Impedance Tubes - Part 1: Standing Wave Ratio Method." The test environment was a semi-anechoic chamber with a temperature of 15°C, a humidity of 20%, and an atmospheric pressure of 100.76 kPa. The measurement range was 100-2000 Hz, and the frequency with the highest sound absorption coefficient was compared:

[0151] Table 2

[0152] Highest sound absorption coefficient Example 1 0.43 Example 2 0.41 Example 3 0.45 Example 4 0.42 Comparative Example 1 0.26 Comparative Example 2 0.31 Comparative Example 3 0.40

[0153] As can be seen from Table 2, the floor prepared by the present invention has a maximum sound absorption coefficient of over 0.41 when measured at different frequencies, indicating a good sound absorption effect.

[0154] Taking Example 1 as the basic sample, the effects of different nanocomposite addition amounts on the maximum sound absorption coefficient were compared;

[0155] Table 3

[0156] parts by weight Highest sound absorption coefficient 0 0.24 4 0.35 8 0.43 12 0.42 16 0.38 20 0.31

[0157] It can be seen from Table 3 that with the increase of the content of nanocomposite materials, the sound absorption performance of the floor first increases and then gradually decreases.

[0158] The above description is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to the embodiment shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description, should be within the scope of protection of the present invention.

Claims

1. Silent LVT floor, characterized by: include: The PVC wear-resistant layer, adhesive layer and base material layer are laminated and compounded; The PVC wear-resistant layer is made of the following ingredients by weight: 50-60 parts of PVC powder, 10-15 parts of plasticizer, and 8-12 parts of nanocomposite material; Adhesive layer adopts: modified polyurea adhesive; The base material layer is made of the following ingredients by weight: 30-35 parts of stone powder, 30-35 parts of PVC powder, and 10-12 parts of plasticizer; The nanocomposite material preparation method is: First, carbon nanotubes are uniformly dispersed in deionized water to obtain a carbon nanotube dispersion, the pH of the carbon nanotube dispersion is adjusted to 9.8, the temperature is adjusted to 80° C., and the dispersion is kept warm for later use; Adding sodium silicate to deionized water, stirring and mixing uniformly to obtain a sodium silicate solution; The sodium silicate solution was added dropwise to the carbon nanotube dispersion while stirring. After the addition was completed, the mixture was stirred for 1 hour and allowed to stand for 2 hours. Aluminum sulfate and sodium hydroxide were then added and stirred for 1 hour. The pH of the mixture was adjusted to neutral and allowed to stand for 4 hours. The mixture was centrifuged at high speed for 30 minutes, filtered, washed with water, dried, calcined at high temperature, and cooled to obtain a nanocomposite material. The mass fraction of the carbon nanotube dispersion is 20-22%; The concentration of sodium silicate solution is 2-2.5 mol / L; Adding the sodium silicate solution dropwise to the carbon nanotube dispersion at a silicon dioxide / carbon nanotube mass ratio of 1-1.5%; The amount of aluminum sulfate and sodium hydroxide added is such that the mass ratio of aluminum oxide to carbon nanotubes in the control system is 3-4%; High-speed centrifugal speed is 8000r / min; The high temperature calcination temperature is 550-600℃ and the time is 40min.

2. The sound-proof LVT floor according to claim 1, characterized in that: The preparation method of the modified polyurea binder is: First, the composite polyether polyol is added to a reaction kettle, and then isophorone diisocyanate is added to the reaction kettle, and stirred to react to obtain a prepolymer; Add urea and bis(4-aminophenyl) disulfide to dimethylacetamide, stir and mix well to obtain an intermediate; The intermediate was added to the prepolymer, the temperature was adjusted to 80° C., the mixture was stirred at this temperature for 30 minutes, and the mixture was cooled to room temperature to obtain a modified polyurea binder.

3. The sound-proof LVT floor according to claim 2, characterized in that: The molar ratio of the composite polyether polyol to isophorone diisocyanate is 3:1; The mixing ratio of urea, bis(4-aminophenyl) disulfide, and dimethylacetamide is 10 g:4 g:100 mL; The mixing mass ratio of the prepolymer to the intermediate is 1:5-6.

4. The sound-proof LVT floor according to claim 3, characterized in that: The preparation method of the composite polyether polyol is as follows: Add diethylene glycol to the reactor, and then add soybean oil, castor oil and water, adjust the temperature to 78°C, keep warm and stir for 30 minutes, then add sucrose, introduce nitrogen into the reactor, exhaust the air in the reactor, evacuate to 0.5Pa, then introduce dimethylamine, adjust the temperature to 98°C, and then add propylene oxide dropwise while stirring. After the addition is completed, heat to 120°C, continue stirring for 40 minutes, adjust the pressure to 0.3MPa, the temperature to 112°C, continue keeping warm and stirring for 4 hours, and then dry for 1 hour to obtain a composite polyether polyol.

5. The sound-proof LVT floor according to claim 4, characterized in that: The weight parts of the raw materials of the composite polyether polyol are respectively: 5 parts of diethylene glycol, 12 parts of soybean oil, 18 parts of castor oil, 4.5 parts of water, 25.5 parts of sucrose, 1.2 parts of dimethylamine, and 51.3 parts of propylene oxide.

6. The sound-proof LVT floor according to claim 1, characterized in that: The plasticizer is dioctyl terephthalate.

7. The production process of the silent LVT floor according to claim 1, characterized in that: include: The PVC wear-resistant layer, adhesive layer and base material layer are hot-pressed to obtain a slab; The slab is then cured for 12 hours, then rolled with UV paint, tempered, cured for 24 hours, and then punched, trimmed, laminated and packaged to complete.

8. The production process of the silent LVT floor according to claim 7, characterized in that: The hot pressing temperature is 145-150°C and the pressure is 8-10MPa; The health-preserving temperature is 25°C; The lamination is carried out by using self-adhesive EVA film for lamination packaging.

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