CN114644775A - Nanoscale waterproof light-mixing foaming tablecloth and preparation method thereof - Google Patents

Abstract

The invention discloses a nanoscale waterproof light-mixing foaming tablecloth which is sequentially provided with a nano coating, a PVC foaming layer and a blended velvet layer from bottom to top; the PVC foaming layer comprises the following components in parts by weight: 240-260 parts of PVC resin powder material, 185-200 parts of filler, 45-65 parts of modified polyphenylene sulfone terephthalamide fiber, 54-68 parts of plasticizer, 17-21 parts of flame retardant, 12-18 parts of lubricant, 5.5-6 parts of heat stabilizer, 0.1-0.2 part of pigment powder, 0.001-0.005 part of brightener and 13-15 parts of foaming aid. Compared with the traditional tablecloth material, the nanoscale waterproof light mixed foaming tablecloth prepared by the invention is better improved in the aspects of skid resistance, water resistance, temperature resistance and aging resistance.

Description

A nano-scale waterproof light-mixed foam tablecloth and preparation method thereof

technical field

The invention relates to the field of household materials, in particular to a nano-level waterproof light-mixed foam tablecloth and a preparation method.

Background technique

Tablecloths, also known as tablecloths, are items that are covered on the desktop to prevent pollution or increase beauty. There are many types of existing tablecloths. The traditional tablecloths are textiles, but the textile tablecloths have poor waterproof and antifouling effects. It needs to be replaced and cleaned frequently, which increases people's housework burden. Now there are plastic tablecloths on the market, such as PVC tablecloths. Although the waterproof and anti-fouling ability has been improved, there are problems such as poor anti-slip, thick thickness, and stiff hand feel. The thermal stability of PVC is not good, it is easy to become hard and brittle at low temperature, it is easy to soften and relax at high temperature, and its aging resistance is also relatively poor. Therefore, it is necessary to further improve it to improve the feel and various properties of PVC materials. So as to meet people's higher requirements for PVC tablecloths in the market.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the purpose of the present invention is to provide a nano-scale foamed tablecloth with good water resistance, light and thin hand feel, good slip resistance, good thermal stability and good aging resistance and a preparation method.

The object of the present invention adopts the following technical solutions to realize:

In a first aspect, the present invention provides a nano-scale waterproof light-mixed foamed tablecloth, wherein the tablecloth is sequentially arranged from bottom to top as a nanocoating layer, a PVC foaming layer and a blended fleece layer.

Preferably, the components of the nano-coating, in parts by weight, include:

30-50 parts of silicone resin, 16-20 parts of inorganic silicate, 25-30 parts of nano silica, 2-4 parts of polydimethylsiloxane, 0.1-0.3 parts of platinum catalyst and 15-22 parts of toluene .

Preferably, the silicone resin is polymethylphenyl silicone resin with a molecular weight of 1000-2000.

Preferably, the inorganic silicate is liquid potassium silicate with a modulus of 2.5-2.8.

Preferably, the platinum catalyst is a platinum-vinylsiloxane complex.

Preferably, the components of the PVC foam layer are calculated in parts by weight, including:

240-260 parts of PVC resin powder, 185-200 parts of filler, 45-65 parts of modified polyphenylsulfone terephthalamide fiber, 54-68 parts of plasticizer, 17-21 parts of flame retardant, lubricant 12-18 parts, 5.5-6 parts of heat stabilizer, 0.1-0.2 part of pigment powder, 0.001-0.005 part of whitening agent and 13-15 parts of foaming aid.

Preferably, the degree of polymerization of the PVC resin powder is 1340, the particle size is 0.1-0.2 mm, and the density is 1.35-1.45 g/cm ³ .

Preferably, the filler is calcium carbonate powder with a particle size of 100-200 μm.

Preferably, the diameter of the modified polyphenylsulfone terephthalamide fiber is 20-40 μm and the length is 5-10 mm.

Preferably, the plasticizer is diethyl phthalate or dioctyl phthalate.

Preferably, the flame retardant is a phosphorus-based flame retardant, which is obtained by mixing tributyl phosphate and tris(3-chloropropyl) phosphate in a mass ratio of 1:0.2-0.4.

Preferably, the lubricant is obtained by mixing polyethylene wax and calcium stearate in a mass ratio of 1:1.2-1.8.

Preferably, the heat stabilizer is an organotin stabilizer, including dibutyltin dilaurate or dibutyltin dimaleate.

Preferably, the pigment powder is an inorganic pigment, including at least one of iron oxide red, iron oxide black, iron oxide green, iron oxide yellow, iron oxide orange, and iron oxide brown.

Preferably, the whitening agent is a fluorescent whitening agent, specifically 2,2'-(4-4'-distyryl)bisbenzoxazole.

Preferably, the foaming aid is 4,4'-oxobisbenzenesulfonylhydrazide.

Preferably, the preparation method of the modified polyphenylsulfone terephthalamide fiber is:

(1) preparation of modified niobium diselenide;

M1. Weigh hydrogen peroxide and sulfuric acid and mix them evenly, put in niobium diselenide powder, stir at room temperature for 2-5 minutes, filter out the solid and clean it with pure water until neutral, and dry to obtain the first niobium diselenide A treated product; wherein, the mass concentration of sulfuric acid is 98%, and the mass ratio of niobium diselenide powder, hydrogen peroxide and sulfuric acid is 1:5-8:15-20;

M2. Put the first treated product of niobium diselenide into ammonia water, mix well, add silane coupling agent KH-550, heat up to 45-55°C, stir for 2-5h, filter out the solid and wash with pure water at least Three times, after the drying treatment, the second treated product of niobium diselenide is obtained; wherein, the mass concentration of ammoniacal liquor is 25%, and the mass ratio of the first treated product of niobium diselenide, silane coupling agent KH-550 and ammoniacal liquor is 1: 0.1-0.3:6-10;

M3. Weigh p-hydroxybenzoic acid and mix with toluene, add dropwise N,N-dimethylformamide, mix evenly at room temperature, add thionyl chloride dropwise, then continue to heat up to 50-60°C, and stir to react 3-5h, after cooling to room temperature, stand for stratification, take the lower layer and remove the solvent to obtain p-hydroxybenzoyl chloride; wherein, p-hydroxybenzoic acid, N,N-dimethylformamide, thionyl chloride and The mass ratio of toluene is 1:0.84-0.92:2.1-2.5:4.3-6.2;

M4. Weigh the second treated product of niobium diselenide and mix it with dichloromethane. After stirring evenly, gradually add p-hydroxybenzoyl chloride. After the addition is complete, add the acid binding agent triethylamine, and stir and react at room temperature for 15- 20h, after filtering, washing and drying, the modified niobium diselenide is obtained; wherein, the mass ratio of the second treated product of niobium diselenide, p-hydroxybenzoyl chloride and dichloromethane is 1:0.4-0.6:10- 15. The amount of triethylamine added is 2%-4% of the second treated material of niobium diselenide;

(2) Preparation of fibers:

N1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 0.5-1h, add p-benzene Diformyl chloride, after stirring for 0.5-1 h, heated to room temperature, stirred for 0.5-1 h, heated to 55-60 °C again, added dodecyl trimethyl ammonium hydroxide, cooled to room temperature and stirred for 0.5-1 h to obtain a polymer Phenylsulfone-terephthalamide mixed solution; wherein, the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'-diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1 : 4.8-5.2:0.9-1.3:16-20, the mass ratio of dodecyltrimethylammonium hydroxide and N,N-dimethylformamide is 1.8-2.4:100;

N2. Add modified niobium diselenide to the mixed solution of polyphenylsulfone terephthalamide, mix and stir evenly to form a spinning solution, which is processed by wet spinning process, and then subjected to high temperature drawing to obtain modified niobium diselenide Polyphenylsulfone terephthalamide fiber; wherein, the mass ratio of modified niobium diselenide and polyphenylsulfone terephthalamide mixed solution is 4.2-6.4:100.

Preferably, in the wet spinning process, the spinning solution is spun from a spinneret into a coagulation bath. After the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried. The coagulation bath is obtained by mixing calcium chloride, N,N-dimethylformamide and deionized water according to the mass ratio of 1:20:25, and the temperature is 15-20°C. The spinneret speed in the middle jet is 5-10m/min.

Preferably, the high-temperature drawing is to draw the fibers obtained by spinning through a heat pipe at 300-350° C., and the drawing ratio is 1.1-1.2 times.

In a second aspect, the present invention provides a method for preparing a nano-scale waterproof light-mixed foam tablecloth, comprising the following steps:

The first step: PVC foam layer raw material mixing:

Weigh PVC resin powder, filler, modified polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foam according to parts by weight Auxiliary, mix and stir evenly to obtain the raw material mixture of PVC foam layer;

The second step: PVC foam layer preparation:

The raw material mixture of the PVC foaming layer is subjected to high temperature foaming through five-stage foaming zone temperature control. , four zones: 200-210℃, five zones: 180-185℃; foaming time is 0.5-0.8h;

Step 3: Nanocoating Raw Material Mixing:

Weigh silicone resin, inorganic silicate, nano-silica, polydimethylsiloxane and toluene according to the parts by weight, and mix them with toluene. liquid;

Step 4: Nanocoating Coating:

The nano-coating raw material mixture is coated on the foamed PVC layer by the blade coating process, treated at a temperature of 55-60 ℃ for 0.2-0.5h, and then placed at 120-130 ℃ for 0.1-0.3h , The thickness of PVC foam layer is 400-720μm, and the thickness of waterproof coating is 300-450μm;

Step 5: Roll Blended Flannel:

The blended flannel is hot-pressed on the foamed PVC surface by a roller press, the pressure of the rubber roller: (3.2±2) kgf/cm2, the bonding temperature: (140±5) ℃, the temperature of the large cylinder: (140 ±10)℃, water temperature of rubber roller: (12±3)℃, water temperature of cooling roller: (12±3)℃, speed of cooling roller: (28±1)m/min, speed of traction roller: (28±1)m /min;

The sixth step, design the texture:

Use the vacuum suction process to suck out all kinds of textures on the bottom of the product as needed.

The beneficial effects of the present invention are:

1. The bottom surface of the existing ordinary tablecloth is PVC, which is deficient in slip resistance and waterproofness. The new process of the present invention adds a layer of nano-waterproof material on the bottom surface, thereby improving the slip resistance and waterproofness of the tablecloth, which perfectly solves this problem. .

2. The thermal stability of the traditional PVC material is not good, it is easy to become hard and brittle at low temperature, it is easy to soften and relax at high temperature, and the aging resistance is also relatively poor. The self-made modified polyphenylsulfone terephthalamide fiber improves the thermal stability and aging resistance of the PVC foam material, and also improves the mechanical properties of the PVC material, thus making the prepared foam material PVC has better utilization value.

3. The present invention makes the hand feeling of the tablecloth better by adding a blended fleece layer. In general, if you want the texture of the tablecloth bottom to be clear, you need to press the weight, and the weight will reduce the thickness. The inability to have both is also a problem in the previous technology. The present invention uses the vacuum texture technology to not only make the texture clear, but also reduce the thickness. Not only does the thickness not decrease, but it also increases slightly.

4. In the present invention, modified polyphenylsulfone terephthalamide fiber is added to the foam layer of PVC. obtained after spinning.

Detailed ways

In order to illustrate the present invention more clearly, and to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solutions of the present invention are now described in detail below, but should not be construed as a limitation on the practicable scope of the present invention.

Polyphenylsulfone terephthalamide fiber has good high temperature resistance, corrosion resistance and dimensional stability. The present invention uses it in the modification process of PVC. It is found that the modified PVC material has insufficient mechanical strength and is resistant to Although the aging property and thermal stability are improved a little, the improvement is not large. Therefore, the present application further modifies the polyphenylsulfone terephthalamide fiber, thereby improving the overall performance of PVC.

Modified niobium diselenide is added in the modification preparation process of polyphenylsulfone terephthalamide fiber, and the modification of niobium diselenide is p-hydroxybenzamide, but it is not directly using p-hydroxybenzene Formamide coating, but choose to first aminate the surface of niobium diselenide, and then react with p-hydroxybenzoic acid, so that the generated p-hydroxybenzamide is coated on the surface of niobium diselenide, thereby forming a modified form of niobium diselenide. niobium diselenide. p-Hydroxybenzoic acid is a commonly used raw material for organic synthesis, the present invention utilizes the principle that the carboxyl group on its molecule can be combined with the amino group to form an amide group, firstly, the niobium diselenide is aminated, and then the p-hydroxybenzoic acid and The aminated niobium diselenide combines to form p-hydroxybenzamide coated on the surface of the niobium diselenide.

The preparation process of modified niobium diselenide has better dispersibility, more uniform coating effect and easier coating than direct coating with p-hydroxybenzamide. Phthalamide fibers will also perform better.

The reaction process of modified niobium diselenide is:

The present invention will be further described below in conjunction with the following examples.

Example 1

The utility model relates to a nano-level waterproof light-mixed foam tablecloth. The tablecloth is sequentially arranged from bottom to top as a nano-coating layer, a PVC foaming layer and a blended fleece layer.

The composition of the nano-coating is calculated in parts by weight, including:

40 parts of silicone resin, 18 parts of inorganic silicate, 28 parts of nano-silica, 3 parts of polydimethylsiloxane, 0.2 parts of platinum catalyst and 17 parts of toluene.

The silicone resin is polymethylphenyl silicone resin with a molecular weight of 1000-2000; the inorganic silicate is liquid potassium silicate with a modulus of 2.5-2.8; the platinum catalyst is a platinum-vinylsiloxane complex.

The components of the PVC foam layer are calculated in parts by weight, including:

250 parts of PVC resin powder, 192 parts of filler, 55 parts of modified polyphenylsulfone terephthalamide fiber, 62 parts of plasticizer, 19 parts of flame retardant, 15 parts of lubricant, 5.5 parts of heat stabilizer, pigment 0.1 part of powder, 0.003 part of whitening agent and 14 parts of foaming aid.

The polymerization degree of the PVC resin powder is 1340, the particle size is 0.1-0.2 mm, and the density is 1.35-1.45 g/cm ³ .

The filler is calcium carbonate powder with a particle size of 100-200μm; the diameter of the modified polyphenylsulfone terephthalamide fiber is 20-40μm and the length is 5-10mm; the plasticizer is diethyl phthalate or Dioctyl phthalate; the flame retardant is a phosphorus-based flame retardant, which is obtained by mixing tributyl phosphate and tris(3-chloropropyl) phosphate in a mass ratio of 1:0.3; the lubricant is polyethylene The wax and calcium stearate are mixed according to the mass ratio of 1:1.5; the heat stabilizer is an organic tin stabilizer, which is dibutyltin dilaurate; the pigment powder is an inorganic pigment, including iron oxide red; the brightener is a fluorescent enhancer. The whitening agent is specifically 2,2'-(4-4'-distyryl)bisbenzoxazole; the foaming aid is 4,4'-oxobisphenylsulfonylhydrazide.

The preparation method of modified polyphenylsulfone terephthalamide fiber is:

(1) preparation of modified niobium diselenide;

M1. Weigh hydrogen peroxide and mix with sulfuric acid, drop into niobium diselenide powder, stir at room temperature for 3 min, filter out the solid and clean it with pure water until neutral, dry to obtain the first treatment of niobium diselenide wherein, the mass concentration of sulfuric acid is 98%, and the mass ratio of niobium diselenide powder, hydrogen peroxide and sulfuric acid is 1:6:18;

M2. Put the first treated product of niobium diselenide into ammonia water, mix evenly, add silane coupling agent KH-550, heat up to 50°C, stir for 3h, filter out the solid, wash with pure water at least three times, and dry Then, the second treated product of niobium diselenide is obtained; wherein, the mass concentration of ammonia water is 25%, and the mass ratio of the first treated product of niobium diselenide, silane coupling agent KH-550 and ammonia water is 1:0.2:8;

M3. Weigh p-hydroxybenzoic acid and mix with toluene, add N,N-dimethylformamide dropwise, mix uniformly at room temperature, add thionyl chloride dropwise, then continue to heat up to 55°C, and stir for 4h. After cooling to room temperature, stand for stratification, remove the lower layer and remove the solvent to obtain p-hydroxybenzoyl chloride; wherein, the mass ratio of p-hydroxybenzoic acid, N,N-dimethylformamide, thionyl chloride and toluene is 1:0.88:2.3:5.7;

M4. Weigh the second treated product of niobium diselenide and mix it with dichloromethane. After stirring evenly, gradually add p-hydroxybenzoyl chloride. After the addition is complete, add the acid binding agent triethylamine, and stir and react at room temperature for 18 hours. After filtering, washing and drying, modified niobium diselenide is obtained; wherein, the mass ratio of the second treated product of niobium diselenide, p-hydroxybenzoyl chloride and dichloromethane is 1:0.5:12, and triethylamine is added The amount is 3% of the second treated material of niobium diselenide;

(2) Preparation of fibers:

N1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 0.5h, add terephthalic acid Formyl chloride, after stirring for 0.5h, heated to room temperature, stirred for 0.5h, heated to 55°C again, added dodecyltrimethylammonium hydroxide, cooled to room temperature and stirred for 0.5h to obtain polyphenylsulfone terephthalene Amide mixed solution; wherein, the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1:5.0:1.1:18 , the mass ratio of dodecyltrimethylammonium hydroxide and N,N-dimethylformamide is 2.1:100;

N2. Add modified niobium diselenide to the mixed solution of polyphenylsulfone terephthalamide, mix and stir evenly to form a spinning solution, which is processed by wet spinning process, and then subjected to high temperature drawing to obtain modified niobium diselenide Polyphenylsulfone terephthalamide fiber; wherein, the mass ratio of modified niobium diselenide and polyphenylsulfone terephthalamide is 5.5:100.

In the wet spinning process, the spinning solution is spun from a spinneret to a coagulation bath, and after the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried; Wherein, the coagulation bath is obtained by mixing calcium chloride, N,N-dimethylformamide and deionized water according to the mass ratio of 1:20:25, the temperature is 20°C, and the spinning speed ejected from the spinneret is 10m/min.

The high-temperature drafting is to stretch the fibers obtained by spinning through a heat pipe at 300°C, and the stretching ratio is 1.1 times.

The preparation method of the above-mentioned nano-scale waterproof light-mixed foam tablecloth comprises the following steps:

The first step: PVC foam layer raw material mixing:

Weigh PVC resin powder, filler, modified polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foam according to parts by weight Auxiliary, mix and stir evenly to obtain the raw material mixture of PVC foam layer;

The second step: PVC foam layer preparation:

The raw material mixture of the PVC foaming layer is foamed at high temperature through five-stage foaming zone temperature control. The foaming temperatures are: Zone 1: 160 °C, Zone 2: 180 °C, Zone 3: 200 °C, Zone 4: 210 °C , five zones: 185 ℃; foaming time is 0.6h;

Step 3: Nanocoating Raw Material Mixing:

Weigh silicone resin, inorganic silicate, nano-silica, polydimethylsiloxane and toluene according to the parts by weight, and mix them with toluene. liquid;

Step 4: Nanocoating Coating:

The nano-coating raw material mixture was coated on the foamed PVC layer by the blade coating process, treated at a temperature of 55 ° C for 0.3 h, and then placed at 120 ° C for 0.2 h, and the thickness of the PVC foamed layer was 540 μm. , The thickness of waterproof coating is 350μm;

Step 5: Roll Blended Flannel:

The blended flannel is hot-pressed on the foamed PVC surface by a roller press, the pressure of the rubber roller: (3.2±2) kgf/cm2, the bonding temperature: (140±5) ℃, the temperature of the large cylinder: (140 ±10)℃, water temperature of rubber roller: (12±3)℃, water temperature of cooling roller: (12±3)℃, speed of cooling roller: (28±1)m/min, speed of traction roller: (28±1)m /min;

The sixth step, design the texture:

Use the vacuum suction process to suck out all kinds of textures on the bottom of the product as needed.

Example 2

The utility model relates to a nano-level waterproof light-mixed foam tablecloth. The tablecloth is sequentially arranged from bottom to top as a nano-coating layer, a PVC foaming layer and a blended fleece layer.

The composition of the nano-coating is calculated in parts by weight, including:

30 parts of silicone resin, 16 parts of inorganic silicate, 25 parts of nano silica, 2 parts of polydimethylsiloxane, 0.1 part of platinum catalyst and 15 parts of toluene.

The silicone resin is polymethylphenyl silicone resin with a molecular weight of 1000-2000; the inorganic silicate is liquid potassium silicate with a modulus of 2.5-2.8; the platinum catalyst is a platinum-vinylsiloxane complex.

The components of the PVC foam layer are calculated in parts by weight, including:

240 parts of PVC resin powder, 185 parts of filler, 45 parts of modified polyphenylsulfone terephthalamide fiber, 54 parts of plasticizer, 17 parts of flame retardant, 12 parts of lubricant, 5.5 parts of heat stabilizer, pigment 0.1 part of powder, 0.001 part of whitening agent and 13 parts of foaming aid.

The polymerization degree of the PVC resin powder is 1340, the particle size is 0.1-0.2 mm, and the density is 1.35-1.45 g/cm ³ .

The filler is calcium carbonate powder with a particle size of 100-200μm; the diameter of the modified polyphenylsulfone terephthalamide fiber is 20-40μm and the length is 5-10mm; the plasticizer is diethyl phthalate or Dioctyl phthalate; the flame retardant is a phosphorus-based flame retardant, which is obtained by mixing tributyl phosphate and tris(3-chloropropyl) phosphate in a mass ratio of 1:0.2; the lubricant is polyethylene Wax and calcium stearate are mixed according to the mass ratio of 1:1.2; heat stabilizer is organic tin stabilizer dibutyltin dimaleate; pigment powder is inorganic pigment, including iron oxide black; whitening agent is fluorescent whitening agent, specifically 2,2'-(4-4'-distyryl)bisbenzoxazole; foaming aid is 4,4'-oxobisphenylsulfonylhydrazide.

The preparation method of modified polyphenylsulfone terephthalamide fiber is:

(1) preparation of modified niobium diselenide;

M1. Weigh hydrogen peroxide and mix with sulfuric acid, throw in niobium diselenide powder, stir at room temperature for 2 min, filter out the solid and clean it with pure water until neutral, dry to obtain the first treatment of niobium diselenide wherein, the mass concentration of sulfuric acid is 98%, and the mass ratio of niobium diselenide powder, hydrogen peroxide and sulfuric acid is 1:5:15;

M2. Put the first treated product of niobium diselenide into ammonia water, mix evenly, add silane coupling agent KH-550, heat up to 45°C, stir for 2h, filter out the solid, wash with pure water at least three times, and dry Then, the second treated product of niobium diselenide is obtained; wherein, the mass concentration of ammonia water is 25%, and the mass ratio of the first treated product of niobium diselenide, silane coupling agent KH-550 and ammonia water is 1:0.1:6;

M3. Weigh p-hydroxybenzoic acid and mix with toluene, add N,N-dimethylformamide dropwise, mix evenly at room temperature, add thionyl chloride dropwise, then continue to heat up to 50°C, and stir for 3h. After cooling to room temperature, stand for stratification, remove the lower layer and remove the solvent to obtain p-hydroxybenzoyl chloride; wherein, the mass ratio of p-hydroxybenzoic acid, N,N-dimethylformamide, thionyl chloride and toluene is 1:0.84:2.1:4.3;

M4. Weigh the second treated product of niobium diselenide and mix it with dichloromethane. After stirring evenly, gradually add p-hydroxybenzoyl chloride. After the addition is complete, add the acid binding agent triethylamine, and stir and react at room temperature for 15 hours. After filtration, washing and drying, modified niobium diselenide is obtained; wherein, the mass ratio of the second treated product of niobium diselenide, p-hydroxybenzoyl chloride and dichloromethane is 1:0.4:10, and triethylamine is added The amount is 2% of the second treated material of niobium diselenide;

(2) Preparation of fibers:

N1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 0.5h, add terephthalic acid Formyl chloride, after stirring for 0.5h, heated to room temperature, stirred for 0.5h, heated to 55°C again, added dodecyltrimethylammonium hydroxide, cooled to room temperature and stirred for 0.5h to obtain polyphenylsulfone terephthalene Amide mixed solution; wherein, the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1:4.8:0.9:16 , the mass ratio of dodecyltrimethylammonium hydroxide and N,N-dimethylformamide is 1.8:100;

N2. Add modified niobium diselenide to the mixed solution of polyphenylsulfone terephthalamide, mix and stir evenly to form a spinning solution, which is processed by wet spinning process, and then subjected to high temperature drawing to obtain modified niobium diselenide Polyphenylsulfone terephthalamide fiber; wherein, the mass ratio of the mixed solution of modified niobium diselenide and polyphenylsulfone terephthalamide is 4.2:100.

In the wet spinning process, the spinning solution is spun from the spinneret to the coagulation bath, and after the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried; Wherein, the coagulation bath is obtained by mixing calcium chloride, N,N-dimethylformamide and deionized water according to the mass ratio of 1:20:25, the temperature is 15°C, and the spinning speed from the spinneret is 5m/min.

The high-temperature drafting is to stretch the fibers obtained by spinning through a heat pipe at 300°C, and the stretching ratio is 1.1 times.

The preparation method of the above-mentioned nano-scale waterproof light-mixed foam tablecloth comprises the following steps:

The first step: PVC foam layer raw material mixing:

Weigh PVC resin powder, filler, modified polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foam according to parts by weight Auxiliary, mix and stir evenly to obtain the raw material mixture of PVC foam layer;

The second step: PVC foam layer preparation:

The raw material mixture of the PVC foam layer is subjected to high temperature foaming through five-stage foaming zone temperature control. , five zones: 185 ℃; foaming time is 0.8h;

Step 3: Nanocoating Raw Material Mixing:

Weigh silicone resin, inorganic silicate, nano-silica, polydimethylsiloxane and toluene according to the parts by weight, and mix them with toluene. liquid;

Step 4: Nanocoating Coating:

The nano-coating raw material mixture is coated on the foamed PVC layer by the blade coating process, treated at a temperature of 60 ° C for 0.5 h, and then placed at 130 ° C for 0.3 h, the thickness of the PVC foam layer is 720 μm , The thickness of waterproof coating is 450μm;

Step 5: Roll Blended Flannel:

The blended flannel is hot-pressed on the foamed PVC surface by a roller press, the pressure of the rubber roller: (3.2±2) kgf/cm2, the bonding temperature: (140±5) ℃, the temperature of the large cylinder: (140 ±10)℃, water temperature of rubber roller: (12±3)℃, water temperature of cooling roller: (12±3)℃, speed of cooling roller: (28±1)m/min, speed of traction roller: (28±1)m /min;

The sixth step, design the texture:

Use the vacuum suction process to suck out all kinds of textures on the bottom of the product as needed.

Example 3

The utility model relates to a nano-level waterproof light-mixed foam tablecloth. The tablecloth is sequentially arranged from bottom to top as a nano-coating layer, a PVC foaming layer and a blended fleece layer.

The composition of the nano-coating is calculated in parts by weight, including:

50 parts of silicone resin, 20 parts of inorganic silicate, 30 parts of nano-silica, 4 parts of polydimethylsiloxane, 0.3 parts of platinum catalyst and 22 parts of toluene.

The silicone resin is polymethylphenyl silicone resin with a molecular weight of 1000-2000; the inorganic silicate is liquid potassium silicate with a modulus of 2.5-2.8; the platinum catalyst is a platinum-vinylsiloxane complex.

The components of the PVC foam layer are calculated in parts by weight, including:

260 parts of PVC resin powder, 200 parts of filler, 65 parts of modified polyphenylsulfone terephthalamide fiber, 68 parts of plasticizer, 21 parts of flame retardant, 18 parts of lubricant, 6 parts of heat stabilizer, pigment 0.2 part of powder, 0.005 part of whitening agent and 15 parts of foaming aid.

The polymerization degree of the PVC resin powder is 1340, the particle size is 0.1-0.2 mm, and the density is 1.35-1.45 g/cm ³ .

The filler is calcium carbonate powder with a particle size of 100-200μm; the diameter of the modified polyphenylsulfone terephthalamide fiber is 20-40μm and the length is 5-10mm; the plasticizer is diethyl phthalate or Dioctyl phthalate; the flame retardant is a phosphorus-based flame retardant, which is obtained by mixing tributyl phosphate and tris(3-chloropropyl) phosphate in a mass ratio of 1:0.4; the lubricant is polyethylene Wax and calcium stearate are obtained by mixing in a mass ratio of 1:1.8; the heat stabilizer is an organic tin stabilizer, including dibutyltin dilaurate or dibutyltin dimaleate; pigment powder is an inorganic pigment, including iron oxide yellow ; The whitening agent is a fluorescent whitening agent, specifically 2,2'-(4-4'-distyryl)bisbenzoxazole; The foaming aid is 4,4'-oxobisphenylsulfonyl Hydrazine.

The preparation method of modified polyphenylsulfone terephthalamide fiber is:

(1) preparation of modified niobium diselenide;

M1. Weigh hydrogen peroxide and mix with sulfuric acid, put in niobium diselenide powder, stir at room temperature for 5 minutes, filter out the solid and use pure water to wash to neutrality, after drying, obtain the first treatment of niobium diselenide wherein, the mass concentration of sulfuric acid is 98%, and the mass ratio of niobium diselenide powder, hydrogen peroxide and sulfuric acid is 1:8:20;

M2. Put the first treated product of niobium diselenide into ammonia water, mix evenly, add silane coupling agent KH-550, heat up to 55°C, stir for 5h, filter out the solid, wash with pure water at least three times, and dry Then, the second treated product of niobium diselenide is obtained; wherein, the mass concentration of ammonia water is 25%, and the mass ratio of the first treated product of niobium diselenide, silane coupling agent KH-550 and ammonia water is 1:0.3:10;

M3. Weigh p-hydroxybenzoic acid and mix with toluene, add dropwise N,N-dimethylformamide, mix uniformly at room temperature, add thionyl chloride dropwise, then continue to heat up to 60°C, and stir for 5h. After cooling to room temperature, stand for stratification, remove the lower layer and remove the solvent to obtain p-hydroxybenzoyl chloride; wherein, the mass ratio of p-hydroxybenzoic acid, N,N-dimethylformamide, thionyl chloride and toluene is 1:0.92:2.5:6.2;

M4. Weigh the second treated product of niobium diselenide and mix it with dichloromethane. After stirring evenly, gradually add p-hydroxybenzoyl chloride. After the addition is complete, add the acid binding agent triethylamine, and stir and react at room temperature for 20 hours. After filtration, washing and drying, modified niobium diselenide is obtained; wherein, the mass ratio of the second treated product of niobium diselenide, p-hydroxybenzoyl chloride and dichloromethane is 1:0.6:15, and triethylamine is added The amount is 4% of the second treated material of niobium diselenide;

(2) Preparation of fibers:

N1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 1 h, add terephthalic acid Acyl chloride, after stirring for 1 hour, warmed to room temperature, stirred for 1 hour, warmed to 60 °C again, added dodecyltrimethylammonium hydroxide, cooled to room temperature and stirred for 1 hour to obtain a polyphenylsulfone terephthalamide mixture; wherein , the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1:5.2:1.3:20, dodecane The mass ratio of trimethylammonium hydroxide to N,N-dimethylformamide is 2.4:100;

N2. Add modified niobium diselenide to the mixed solution of polyphenylsulfone terephthalamide, mix and stir evenly to form a spinning solution, which is processed by wet spinning process, and then subjected to high temperature drawing to obtain modified niobium diselenide Polyphenylsulfone terephthalamide fiber; wherein, the mass ratio of modified niobium diselenide and polyphenylsulfone terephthalamide is 6.4:100.

In the wet spinning process, the spinning solution is spun from a spinneret to a coagulation bath, and after the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried; Wherein, the coagulation bath is obtained by mixing calcium chloride, N,N-dimethylformamide and deionized water according to the mass ratio of 1:20:25, the temperature is 20°C, and the spinning speed ejected from the spinneret is 10m/min.

The high-temperature drafting is to stretch the fibers obtained by spinning through a heat pipe at 350°C, and the stretching ratio is 1.2 times.

The preparation method of the above-mentioned nano-scale waterproof light-mixed foam tablecloth comprises the following steps:

The first step: PVC foam layer raw material mixing:

Weigh PVC resin powder, filler, modified polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foam according to parts by weight Auxiliary, mix and stir evenly to obtain the raw material mixture of PVC foam layer;

The second step: PVC foam layer preparation:

The raw material mixture of the PVC foam layer is subjected to high temperature foaming through five-stage foaming zone temperature control. , five zones: 185 ℃; foaming time is 0.8h;

Step 3: Nanocoating Raw Material Mixing:

Weigh silicone resin, inorganic silicate, nano-silicon dioxide, polydimethylsiloxane and toluene according to the parts by weight, and mix them with toluene. liquid;

Step 4: Nanocoating Coating:

The nano-coating raw material mixture is coated on the foamed PVC layer by the blade coating process, treated at a temperature of 60 ° C for 0.5 h, and then placed at 130 ° C for 0.1-0.3 h, the thickness of the PVC foamed layer. At 720μm, the thickness of waterproof coating is 450μm;

Step 5: Roll Blended Flannel:

The blended flannel is hot-pressed on the foamed PVC surface by a roller press, the pressure of the rubber roller: (3.2±2) kgf/cm2, the bonding temperature: (140±5) ℃, the temperature of the large cylinder: (140 ±10)℃, water temperature of rubber roller: (12±3)℃, water temperature of cooling roller: (12±3)℃, speed of cooling roller: (28±1)m/min, speed of traction roller: (28±1)m /min;

The sixth step, design the texture:

Use the vacuum suction process to suck out all kinds of textures on the bottom of the product as needed.

Comparative Example 1

A PVC foam layer, the difference from Example 1 is that the modified niobium diselenide is replaced with niobium diselenide in the preparation process of the modified polyphenylsulfone terephthalamide fiber. specifically:

The components of the PVC foam layer are calculated in parts by weight, including:

250 parts of PVC resin powder, 192 parts of filler, 55 parts of modified polyphenylsulfone terephthalamide fiber, 62 parts of plasticizer, 19 parts of flame retardant, 15 parts of lubricant, 5.5 parts of heat stabilizer, pigment 0.1 part of powder, 0.003 part of whitening agent and 14 parts of foaming aid.

The polymerization degree of the PVC resin powder is 1340, the particle size is 0.1-0.2 mm, and the density is 1.35-1.45 g/cm ³ .

The filler is calcium carbonate powder with a particle size of 100-200μm; the diameter of the modified polyphenylsulfone terephthalamide fiber is 20-40μm and the length is 5-10mm; the plasticizer is diethyl phthalate or Dioctyl phthalate; the flame retardant is a phosphorus-based flame retardant, which is obtained by mixing tributyl phosphate and tris(3-chloropropyl) phosphate in a mass ratio of 1:0.3; the lubricant is polyethylene The wax and calcium stearate are mixed according to the mass ratio of 1:1.5; the heat stabilizer is an organic tin stabilizer, which is dibutyltin dilaurate; the pigment powder is an inorganic pigment, including iron oxide red; the brightener is a fluorescent enhancer. The whitening agent is specifically 2,2'-(4-4'-distyryl)bisbenzoxazole; the foaming aid is 4,4'-oxobisphenylsulfonylhydrazide.

The preparation method of modified polyphenylsulfone terephthalamide fiber is:

S1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 0.5h, add terephthalic acid Formyl chloride, after stirring for 0.5h, heated to room temperature, stirred for 0.5h, heated to 55°C again, added dodecyltrimethylammonium hydroxide, cooled to room temperature and stirred for 0.5h to obtain polyphenylsulfone terephthalene Amide mixed solution; wherein, the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1:5.0:1.1:18 , the mass ratio of dodecyltrimethylammonium hydroxide and N,N-dimethylformamide is 2.1:100;

S2. Add niobium diselenide to the mixed solution of polyphenylsulfone terephthalamide, mix and stir evenly to form a spinning solution, which is processed by wet spinning process, and then subjected to high temperature drawing to obtain modified polyphenylene Sulfone terephthalamide fiber; wherein, the mass ratio of the mixed solution of niobium diselenide and polyphenylsulfone terephthalamide is 5.5:100.

In the wet spinning process, the spinning solution is spun from a spinneret to a coagulation bath, and after the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried; Wherein, the coagulation bath is obtained by mixing calcium chloride, N,N-dimethylformamide and deionized water according to the mass ratio of 1:20:25, the temperature is 20°C, and the spinning speed ejected from the spinneret is 10m/min.

The high-temperature drafting is to stretch the fibers obtained by spinning through a heat pipe at 300°C, and the stretching ratio is 1.1 times.

The preparation method of the above-mentioned nano-scale waterproof light-mixed foam tablecloth comprises the following steps:

The first step: PVC foam layer raw material mixing:

Weigh PVC resin powder, filler, modified polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foam according to parts by weight Auxiliary, mix and stir evenly to obtain the raw material mixture of PVC foam layer;

The second step: PVC foam layer preparation:

The raw material mixture of the PVC foaming layer is foamed at high temperature through five-stage foaming zone temperature control. The foaming temperatures are: Zone 1: 160 °C, Zone 2: 180 °C, Zone 3: 200 °C, Zone 4: 210 °C , five zones: 185 ℃; foaming time is 0.6h; PVC foaming layer thickness is 540μm.

Comparative Example 2

A PVC foam layer, the difference from Example 1 is that the modified polyphenylene sulfone terephthalamide fibers are replaced with polyphenyl sulfone terephthalamide fibers. specifically:

The components of the PVC foam layer are calculated in parts by weight, including:

250 parts of PVC resin powder, 192 parts of filler, 55 parts of polyphenylsulfone terephthalamide fiber, 62 parts of plasticizer, 19 parts of flame retardant, 15 parts of lubricant, 5.5 parts of heat stabilizer, 0.1 part of pigment powder parts, 0.003 parts of whitening agent and 14 parts of foaming aids.

The polymerization degree of the PVC resin powder is 1340, the particle size is 0.1-0.2 mm, and the density is 1.35-1.45 g/cm ³ .

The filler is calcium carbonate powder with a particle size of 100-200μm; the diameter of the polyphenylsulfone terephthalamide fiber is 20-40μm and the length is 5-10mm; the plasticizer is diethyl phthalate or phthalate Dioctyl diformate; the flame retardant is a phosphorus-based flame retardant, which is obtained by mixing tributyl phosphate and tris(3-chloropropyl) phosphate in a mass ratio of 1:0.3; the lubricant is polyethylene wax and Calcium stearate is obtained by mixing according to the mass ratio of 1:1.5; the heat stabilizer is an organic tin stabilizer, which is dibutyltin dilaurate; the pigment powder is an inorganic pigment, including iron oxide red; the whitening agent is a fluorescent whitening agent , specifically 2,2'-(4-4'-distyryl)bisbenzoxazole; the foaming aid is 4,4'-oxobisphenylsulfonylhydrazide.

The preparation method of polyphenylsulfone terephthalamide fiber is:

S1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 0.5h, add terephthalic acid Formyl chloride, after stirring for 0.5h, heated to room temperature, stirred for 0.5h, heated to 55°C again, added dodecyltrimethylammonium hydroxide, cooled to room temperature and stirred for 0.5h to obtain polyphenylsulfone terephthalene Amide mixed solution; wherein, the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1:5.0:1.1:18 , the mass ratio of dodecyltrimethylammonium hydroxide and N,N-dimethylformamide is 2.1:100;

S2. After the polyphenylsulfone terephthalamide mixed solution is evenly stirred, a spinning solution is formed, which is processed by a wet spinning process, and then drawn at a high temperature to obtain a polyphenylsulfone terephthalamide fiber.

In the wet spinning process, the spinning solution is spun from a spinneret to a coagulation bath, and after the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried; Wherein, the coagulation bath is obtained by mixing calcium chloride, N,N-dimethylformamide and deionized water according to the mass ratio of 1:20:25, the temperature is 20°C, and the spinning speed ejected from the spinneret is 10m/min; high-temperature drafting is to stretch the fibers obtained by spinning through a heat pipe at 300°C, and the stretching ratio is 1.1 times.

The preparation method of the above-mentioned nano-scale waterproof light-mixed foam tablecloth comprises the following steps:

The first step: PVC foam layer raw material mixing:

Weigh PVC resin powder, filler, polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foaming aid according to parts by weight , mix and stir evenly to obtain the raw material mixture of PVC foam layer;

The second step: PVC foam layer preparation:

The raw material mixture of the PVC foaming layer is foamed at high temperature through five-stage foaming zone temperature control. The foaming temperatures are: Zone 1: 160 °C, Zone 2: 180 °C, Zone 3: 200 °C, Zone 4: 210 °C , five zones: 185 ℃; foaming time is 0.6h; PVC foaming layer thickness is 540μm.

Performance Testing:

1. The PVC foam layer materials prepared in Examples 1-3 and Comparative Examples 1-2 were tested separately, and the main test items were: mechanical strength, high temperature resistance, thermal stability and aging resistance. in,

The testing standard for tensile strength is ASTM D-638;

The standard for the detection of elongation at break is ASTM D-638;

The softening point temperature detection method is ASTM D-1525;

The thermal stability is measured by using a torque rheometer to detect the dynamic thermal stability time, and the detection conditions are: 185±1°C, 60rpm.

The test of heat aging resistance is to place the material of the same size in a 120 ℃ oven for 168 hours, and then detect the change rate of its tensile strength;

The test of ultraviolet aging resistance is to place the same size material in ultraviolet light with a wavelength of 375nm for 168h, and then measure the change rate of its tensile strength.

The results are shown in Table 1:

Table 1 Performance comparison of different PVC foam layer materials

It can be seen from Table 1 that the tensile strength of the PVC foam layer materials prepared in Examples 1 to 3 is 38.8 to 43.5 MPa, and the elongation at break is 341% to 366% at the highest, and the values are significantly higher than those of Comparative Example 1. Compared with Comparative Example 2, it shows that the mechanical properties are more excellent; the softening point of the PVC foam layer materials prepared in Examples 1 to 3 is 10 °C higher than that of the conventional modified PVC foam material, and the dynamic thermal stability time can reach up to 19min, indicating that the resistance to The high temperature resistance and thermal stability are stronger; the thermal aging of the PVC foam layer materials prepared in Examples 1 to 3 and the change rate of tensile strength after ultraviolet aging are smaller, indicating that the aging resistance is more excellent.

2. The materials coated with nano-coatings prepared in Examples 1-3 were tested for water resistance and slip resistance.

Among them, the water resistance is tested according to the method of the standard GB/T 328.10-2007; the friction coefficient is tested according to the method of the standard HG/T2729-2012.

The results are shown in Table 2 below:

Table 2 Performance comparison of different nano-coating materials

Example 1 Example 2 Example 3 Water permeability (0.5Mpa/30min) impermeable impermeable impermeable Static friction coefficient 0.86 0.82 0.89

It can be seen from Table 1 that the nano-coatings prepared in Examples 1-3 are impermeable to water under the condition of 0.5Mpa/30min, and the coefficient of static friction is >08, indicating that they have good water resistance and slip resistance.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that , the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. a nano-level waterproof light-mixed foam tablecloth, is characterized in that, described tablecloth is arranged successively from bottom to top as nano-coating, PVC foam layer and blended fleece layer; The components of the PVC foam layer are calculated in parts by weight, including: 240-260 parts of PVC resin powder, 185-200 parts of filler, 45-65 parts of modified polyphenylsulfone terephthalamide fiber, 54-68 parts of plasticizer, 17-21 parts of flame retardant, lubricant 12-18 parts, 5.5-6 parts of heat stabilizer, 0.1-0.2 part of pigment powder, 0.001-0.005 part of whitening agent and 13-15 parts of foaming aid. 2. a kind of nano-scale waterproof light-mixed foam tablecloth according to claim 1, is characterized in that, the composition of described nano-coating comprises according to parts by weight: 30-50 parts of silicone resin, 16-20 parts of inorganic silicate, 25-30 parts of nano silica, 2-4 parts of polydimethylsiloxane, 0.1-0.3 parts of platinum catalyst and 15-22 parts of toluene . 3. A nano-scale waterproof light-mixed foam tablecloth according to claim 2, wherein the silicone resin is polymethylphenyl silicone resin, and the molecular weight is 1000-2000; the inorganic silicic acid The salt is liquid potassium silicate with a modulus of 2.5-2.8; the platinum catalyst is a platinum-vinylsiloxane complex. 4. A kind of nano-scale waterproof light-mixed foam tablecloth according to claim 2, characterized in that, the degree of polymerization of the PVC resin powder is 1340, the particle size is 0.1-0.2mm, and the density is 1.35-1.45g /cm ³ ; the filler is calcium carbonate powder, the particle size is 100-200 μm; the diameter of the modified polyphenylsulfone terephthalamide fiber is 20-40 μm, and the length is 5-10 mm; the plasticized The agent is diethyl phthalate or dioctyl phthalate; the flame retardant is a phosphorus-based flame retardant, which is composed of tributyl phosphate and tris(3-chloropropyl) phosphate according to the mass ratio It is obtained by mixing 1:0.2-0.4; the lubricant is obtained by mixing polyethylene wax and calcium stearate in a mass ratio of 1:1.2-1.8; the thermal stabilizer is an organotin stabilizer, including dilauric acid Dibutyltin or dibutyltin dimaleate; the pigment powder is an inorganic pigment, including at least one of iron oxide red, iron oxide black, iron oxide green, iron oxide yellow, iron oxide orange, and iron oxide brown; the The whitening agent is a fluorescent whitening agent, specifically 2,2'-(4-4'-distyryl)bisbenzoxazole; the foaming aid is 4,4'-oxobisbenzenesulfonic acid Hydrazide. 5. a kind of nanometer waterproof light mixing foam tablecloth according to claim 2, is characterized in that, the preparation method of described modified polyphenylsulfone terephthalamide fiber is: (1) preparation of modified niobium diselenide; M1. Weigh hydrogen peroxide and sulfuric acid and mix them evenly, put in niobium diselenide powder, stir at room temperature for 2-5 minutes, filter out the solid and clean it with pure water until neutral, and dry to obtain the first niobium diselenide A treated product; wherein, the mass concentration of sulfuric acid is 98%, and the mass ratio of niobium diselenide powder, hydrogen peroxide and sulfuric acid is 1:5-8:15-20; M2. Put the first treated product of niobium diselenide into ammonia water, mix well, add silane coupling agent KH-550, heat up to 45-55°C, stir for 2-5h, filter out the solid and wash with pure water at least Three times, after the drying treatment, the second treated product of niobium diselenide is obtained; wherein, the mass concentration of ammoniacal liquor is 25%, and the mass ratio of the first treated product of niobium diselenide, silane coupling agent KH-550 and ammoniacal liquor is 1: 0.1-0.3:6-10; M3. Weigh p-hydroxybenzoic acid and mix with toluene, add dropwise N,N-dimethylformamide, mix evenly at room temperature, add thionyl chloride dropwise, then continue to heat up to 50-60°C, and stir to react 3-5h, after cooling to room temperature, stand for stratification, take the lower layer and remove the solvent to obtain p-hydroxybenzoyl chloride; wherein, p-hydroxybenzoic acid, N,N-dimethylformamide, thionyl chloride and The mass ratio of toluene is 1:0.84-0.92:2.1-2.5:4.3-6.2; M4. Weigh the second treated product of niobium diselenide and mix it with dichloromethane. After stirring evenly, gradually add p-hydroxybenzoyl chloride. After the addition is complete, add the acid binding agent triethylamine, and stir and react at room temperature for 15- 20h, after filtering, washing and drying, the modified niobium diselenide is obtained; wherein, the mass ratio of the second treated product of niobium diselenide, p-hydroxybenzoyl chloride and dichloromethane is 1:0.4-0.6:10- 15. The amount of triethylamine added is 2%-4% of the second treated material of niobium diselenide; (2) Preparation of fibers: N1. Weigh 3,3'-diaminodiphenylsulfone and 4.4'diaminodiphenylsulfone, mix them into N,N-dimethylformamide, place them in an ice-water bath and stir for 0.5-1h, add p-benzene Diformyl chloride, after stirring for 0.5-1 h, heated to room temperature, stirred for 0.5-1 h, heated to 55-60 °C again, added dodecyl trimethyl ammonium hydroxide, cooled to room temperature and stirred for 0.5-1 h to obtain a polymer Phenylsulfone-terephthalamide mixed solution; wherein, the mass ratio of 3,3'-diaminodiphenylsulfone, 4.4'-diaminodiphenylsulfone, terephthaloyl chloride and N,N-dimethylformamide is 1 : 4.8-5.2:0.9-1.3:16-20, the mass ratio of dodecyltrimethylammonium hydroxide and N,N-dimethylformamide is 1.8-2.4:100; N2. Add modified niobium diselenide to the mixed solution of polyphenylsulfone terephthalamide, mix and stir evenly to form a spinning solution, which is processed by wet spinning process, and then subjected to high temperature drawing to obtain modified niobium diselenide Polyphenylsulfone terephthalamide fiber; wherein, the mass ratio of the mixed solution of modified niobium diselenide and polyphenylsulfone terephthalamide is 4.2-6.4:100. 6. A kind of nano-scale waterproof light-mixed foam tablecloth according to claim 5, characterized in that, in the wet spinning process, the spinning solution is spun from a spinneret to a coagulation bath, and is kept in the coagulation bath. After the fibers are formed in the coagulation bath, the fibers are filtered out and washed with pure water at least three times, and then dried; wherein, the coagulation bath is composed of calcium chloride, N,N-dimethylformamide and deionized water according to the quality The ratio is 1:20:25, the temperature is 15-20°C, and the spinning speed from the spinneret is 5-10m/min. 7 . The nano-scale waterproof light-mixed foam tablecloth according to claim 5 , wherein the high-temperature drafting is to stretch the fibers obtained by spinning through a heat pipe at 300-350° C., and the stretching ratio is 7 . 1.1-1.2 times. 8. a preparation method of the nano-scale waterproof light mixing foam tablecloth described in any one of claims 1-7, is characterized in that, comprises the following steps: The first step: PVC foam layer raw material mixing: Weigh PVC resin powder, filler, modified polyphenylsulfone terephthalamide fiber, plasticizer, flame retardant, lubricant, heat stabilizer, pigment powder, whitening agent and foam according to parts by weight Auxiliary, mix and stir evenly to obtain the raw material mixture of PVC foam layer; The second step: PVC foam layer preparation: The raw material mixture of the PVC foam layer is subjected to high temperature foaming through five-stage foaming zone temperature control; Step 3: Nanocoating Raw Material Mixing: Weigh silicone resin, inorganic silicate, nano-silicon dioxide, polydimethylsiloxane and toluene according to the parts by weight, and mix them with toluene. liquid; Step 4: Nanocoating Application: The nano-coating raw material mixture is applied to the foamed PVC layer by the scraping process, treated at a temperature of 55-60 ℃ for 0.2-0.5h, and then placed at 120-130 ℃ for 0.1-0.3h ; Step 5: Roll Blended Flannel: The blended fleece is hot-pressed on the foamed PVC surface through a roller press; The sixth step, design the texture: Use the vacuum suction process to suck out all kinds of textures on the bottom of the product as needed. 9 . The method for preparing a nano-scale waterproof light-mixed foam tablecloth according to claim 8 , wherein in the second step, the foaming temperatures are respectively: the first zone: 160-170° C., the second zone : 180-190°C, three zones: 195-215°C, four zones: 200-210°C, five zones: 180-185°C; foaming time is 0.5-0.8h. 10 . The method for preparing a nano-scale waterproof light-mixed foam tablecloth according to claim 8 , wherein the thickness of the PVC foam layer is 400-720 μm, and the thickness of the waterproof coating is 300-450 μm. 11 .