CN110962421A - Flame-retardant PVC (polyvinyl chloride) mesh fabric with electromagnetic shielding function and preparation method thereof - Google Patents
Flame-retardant PVC (polyvinyl chloride) mesh fabric with electromagnetic shielding function and preparation method thereof Download PDFInfo
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- CN110962421A CN110962421A CN201911380060.XA CN201911380060A CN110962421A CN 110962421 A CN110962421 A CN 110962421A CN 201911380060 A CN201911380060 A CN 201911380060A CN 110962421 A CN110962421 A CN 110962421A
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
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- B32B2307/00—Properties of the layers or laminate
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
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- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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Abstract
The invention discloses flame-retardant PVC (polyvinyl chloride) mesh fabric with an electromagnetic shielding function and a preparation method thereof. During preparation, an upper adhesive film, a lower adhesive film and the electromagnetic shielding mesh are prepared respectively; pressing the prepared upper adhesive film, the prepared lower adhesive film and the electromagnetic shielding mesh cloth through a rolling laminating machine, wherein the temperature of a press roll is 120-150 ℃, the laminating rolling pressure is 2-3 MPa, the laminating rolling speed is 4-8 m/min, and the overall thickness of the PVC sandwich mesh cloth is controlled to be 0.8-1.5 mm; then cooling the attached PVC net clamping cloth by a cooling roller; and finally, cutting, inspecting and packaging according to specifications to obtain a finished product. The PVC net clamping cloth uses the net cloth with the electromagnetic shielding function, integrates the electromagnetic shielding function, and can be applied to places needing communication protection, in particular military confidential tents.
Description
Technical Field
The invention belongs to the field of polymer composite materials, and relates to flame-retardant PVC (polyvinyl chloride) mesh fabric with an electromagnetic shielding function and a preparation method thereof.
Background
The sandwich mesh cloth is made of a woven mesh cloth as a base material, and one or more layers of plastic materials with different properties are compounded on two sides of the mesh cloth. Generally, the PVC net sandwiched cloth has excellent physical properties, great strength, and is waterproof, dustproof, mildew-proof and the like. The inflatable film is mainly used in various fields such as vehicle canopies, sun canopies, tents, temporary tents, inflatable film buildings and the like, and has wide application.
PVC laminated mesh cloth is also one of the most common raw materials for military tents. As military equipment has developed, some military tents have required electromagnetic shielding. The tent with the electromagnetic shielding function can reduce electromagnetic radiation leakage, prevent military conditions from divulging secrets and guarantee communication safety. Nowadays, it is a common practice to lay an electromagnetic radiation protection net on the outside of a tent to achieve the shielding function. The method has the advantages of high cost, long erection time and general effect.
The flame retardancy of military tents is generally required to reach B1 level, while general fabrics, plastic materials and the like are not flame retardant. CN107501779A discloses a flame-retardant PVC (polyvinyl chloride) mesh fabric film and a preparation method thereof, wherein the PVC mesh fabric film has flame retardance and no shielding function and is not suitable for special military tents.
Disclosure of Invention
Aiming at the defects of the prior art, the invention integrates the electromagnetic shielding function and the flame retardant function into the PVC net clamping cloth through the selection of raw materials and the improvement of the preparation method, so that the PVC net clamping cloth has double functions and can be used for producing military tents.
The technical scheme for realizing the purpose of the invention is as follows:
the utility model provides a fire resistance PVC presss from both sides screen cloth with electromagnetic shield function, from the top down is glued membrane, electromagnetic shield function screen cloth, lower glued membrane in proper order.
The upper adhesive film and the lower adhesive film comprise the following raw materials in parts by mass: 40-50 parts of suspension method-polyvinyl chloride resin (with the polymerization degree of 1100-1300), 15-20 parts of phthalic diester, 5-10 parts of isophthalic diester, 2-5 parts of diisooctyl sebacate, 1-2 parts of phenyl alkylsulfonate, 3-10 parts of aluminum hydroxide, 6-12 parts of octabromodiphenyl ether, 3-8 parts of toluene-diphenyl phosphate, 2-5 parts of light stabilizer HPT, 0.1-0.8 part of ultraviolet absorbent UV-P, 0.01-0.05 part of antibacterial and mildew preventive and 1-5 parts of organic pigment.
The electromagnetic shielding function mesh fabric is composed of mesh fabric adhesive and electromagnetic shielding conductive fabric.
The mesh fabric adhesive comprises the following raw materials in parts by mass: 10-15 parts of polyoxypropylene polyol (with the average molecular weight of 3000), 6-10 parts of MDI (diphenyl-methane-diisocyanate) adhesive, 4-7 parts of TDI adhesive, 2-4 parts of 1, 4-butanediol, 2-3 parts of xylene and 10-15 parts of suspension-process polyvinyl chloride resin (with the polymerization degree of 1100-1300).
The electromagnetic shielding conductive cloth is a mesh cloth with electromagnetic shielding function prepared by chemically plating or electroplating conductive metal (including but not limited to silver, copper, nickel, aluminum, stainless steel and the like) on high-strength nylon mesh cloth, and is a conventional product and commercially available.
The electromagnetic shielding conductive cloth has electromagnetic shielding effectiveness of over 30dB in the frequency range of 300 MHz-20000 MHz.
The mesh of the high-strength nylon eyelet fabric is not more than 3 mm, and the yarn count is not less than 75 Dx100D.
The invention discloses a preparation method of flame-retardant PVC sandwich mesh cloth with an electromagnetic shielding function, which comprises the following steps:
step I: respectively preparing an upper adhesive film, a lower adhesive film and an electromagnetic shielding mesh;
step II: pressing the prepared upper adhesive film, the prepared lower adhesive film and the electromagnetic shielding function mesh cloth through a rolling laminating machine, wherein the temperature of a press roll is 120-150 ℃, the laminating rolling pressure is 2-3 MPa, the laminating rolling speed is 4-8 m/min, and the whole thickness of the PVC sandwich mesh cloth is controlled to be 0.8-1.5 mm;
step III: cooling the attached PVC net clamping cloth by a cooling roller;
step IV: cutting, inspecting and packaging according to specifications to obtain a finished product.
The preparation method of the upper adhesive film and the lower adhesive film comprises the following steps:
step 1: putting the raw materials of the upper adhesive film and the lower adhesive film into a high-speed stirrer according to a formula ratio, stirring at a low rotating speed, switching to high-speed stirring when the temperature rises to 80-100 ℃, continuously heating to 100-120 ℃, stirring for 6-10 minutes, and then cooling to room temperature for later use;
step 2: filtering the material obtained in the step 1 to obtain pasty slurry;
and step 3: injecting the filtered pasty slurry into a roller press for rolling;
and 4, step 4: and (3) rolling and molding the material rolled in the step (3) by a rolling mill to obtain an upper adhesive film and a lower adhesive film, wherein the thickness of the adhesive film is 0.2-0.4 mm.
The preparation method of the mesh fabric with the electromagnetic shielding function specifically comprises the following steps:
step a: putting polyoxypropylene polyol, MDI (diphenyl diisocyanate) adhesive, TDI (toluene diisocyanate) adhesive and 1, 4-butanediol into a high-speed stirrer according to a formula ratio, heating to 80-90 ℃, reacting for 2-3 hours, cooling to room temperature, adding xylene, stirring for 2-5 minutes, putting suspension method-polyvinyl chloride resin, heating to 80-90 ℃, and stirring for 0.5-1 hour to obtain a mesh fabric adhesive;
step b: uniformly blade-coating the mesh fabric adhesive obtained in the step a on the electromagnetic shielding conductive fabric through a cloth scraper, wherein the using amount of the mesh fabric adhesive is controlled to be 30-50 g/m2And then baking the screen cloth in a 50-70 ℃ horizontal oven at the speed of 3-5 m/min for 0.5-1 hour to obtain the screen cloth with the electromagnetic shielding function.
When the PVC laminated mesh fabric is prepared, flame retardants such as aluminum hydroxide, octabromodiphenyl ether, toluene phosphate-diphenyl ester and the like are added, so that the flame retardance of the laminated mesh fabric can reach B1 level, and the general flame retardance requirement is met. The electromagnetic shielding mesh is innovatively used, integrates the electromagnetic shielding function, and can be applied to places needing communication protection, particularly military confidential tents. In addition, the PVC net clamping cloth with the electromagnetic shielding function and the flame retardant property can be used within the temperature range of-30-70 ℃, is light aging resistant, has the mould resistance of 0 grade, and is very suitable for outdoor use.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited thereto.
Example 1:
the utility model provides a fire resistance PVC presss from both sides screen cloth with electromagnetic shield function, from the top down is glued membrane, electromagnetic shield function screen cloth, lower glued membrane in proper order.
The upper adhesive film and the lower adhesive film comprise the following raw materials in parts by mass: 42 parts of suspension method-polyvinyl chloride resin (with the polymerization degree of 1100-1300), 16 parts of phthalic diester, 5 parts of isophthalic diester, 3 parts of diisooctyl sebacate, 1 part of phenyl alkylsulfonate, 8 parts of aluminum hydroxide, 11 parts of octabromodiphenyl ether, 6 parts of toluene-diphenyl phosphate, 5 parts of light stabilizer HPT, 0.3 part of ultraviolet absorbent UV-P, 0.02 part of antibacterial and antifungal agent and 3 parts of organic pigment.
The electromagnetic shielding function mesh fabric is composed of mesh fabric adhesive and electromagnetic shielding conductive fabric.
The mesh fabric adhesive comprises the following raw materials in parts by mass: 12 parts of polypropylene oxide polyalcohol (with the average molecular weight of 3000), 5 parts of MDI adhesive, 5 parts of TDI adhesive, 2 parts of 1, 4-butanediol, 3 parts of dimethylbenzene and 12 parts of suspension-process polyvinyl chloride resin (with the polymerization degree of 1100-1300).
The electromagnetic shielding conductive cloth is electro-silvered high-strength mesh cloth, and the electromagnetic shielding efficiency can reach more than 50dB in the frequency range of 300 MHz-20000 MHz.
The mesh of the high-strength nylon mesh cloth is 3 mm, and the yarn count is 75 Dx 100D.
The preparation method of the PVC sandwich mesh cloth specifically comprises the following steps:
step I: respectively preparing an upper adhesive film, a lower adhesive film and an electromagnetic shielding mesh;
step II: pressing the prepared upper adhesive film, the prepared lower adhesive film and the electromagnetic shielding function mesh cloth through a rolling laminating machine, wherein the temperature of a press roll is 120 ℃, the laminating rolling pressure is 2.5MPa, the laminating rolling speed is 5m/min, and the overall thickness of the mesh cloth is 1 mm;
step III: cooling the attached PVC net clamping cloth by a cooling roller;
step IV: cutting, inspecting and packaging according to specifications to obtain a finished product.
The preparation method of the upper adhesive film and the lower adhesive film comprises the following steps:
step 1: putting the raw materials of the upper adhesive film and the lower adhesive film into a high-speed stirrer according to the formula proportion, stirring at a low rotating speed, switching to high-speed stirring when the temperature is raised to 80 ℃, continuously heating to 120 ℃, stirring for 10 minutes, and then cooling to room temperature for later use;
step 2: filtering the material obtained in the step 1 to obtain pasty slurry;
and step 3: injecting the filtered pasty slurry into a roller press for rolling;
and 4, step 4: and (4) rolling and molding the material rolled in the step (3) by a rolling mill to obtain an upper adhesive film and a lower adhesive film, wherein the thickness of the adhesive film is 0.35 mm.
The preparation method of the mesh fabric with the electromagnetic shielding function comprises the following steps:
step a: putting polyoxypropylene polyol, MDI (diphenyl diisocyanate) adhesive, TDI (toluene diisocyanate) adhesive and 1, 4-butanediol into a high-speed stirrer according to a formula ratio, heating to 85 ℃, reacting for 2-3 hours, cooling to room temperature, adding xylene, stirring for 2 minutes, putting suspension-polyvinyl chloride resin, heating to 80 ℃, and stirring for 0.5 hour to obtain a mesh fabric adhesive;
step b: c, uniformly coating the mesh fabric adhesive obtained in the step a on the electromagnetic shielding conductive fabric through a cloth scraper, wherein the using amount of the mesh fabric adhesive is controlled to be 40g/m2And then baked in a 60 ℃ horizontal oven at a speed of 4m/min for 0.8 hour. And obtaining the mesh fabric with the electromagnetic shielding function.
Example 2:
the utility model provides a fire resistance PVC presss from both sides screen cloth with electromagnetic shield function, from the top down is glued membrane, electromagnetic shield function screen cloth, lower glued membrane in proper order.
The upper adhesive film and the lower adhesive film comprise the following raw materials in parts by mass: 48 parts of suspension method-polyvinyl chloride resin (with the polymerization degree of 1100-1300), 18 parts of phthalic diester, 5 parts of isophthalic diester, 4 parts of diisooctyl sebacate, 1 part of phenyl alkylsulfonate, 9 parts of aluminum hydroxide, 12 parts of octabromodiphenyl ether, 6 parts of toluene-diphenyl phosphate, 5 parts of light stabilizer HPT, 0.5 part of ultraviolet absorbent UV-P, 0.03 part of antibacterial mildew preventive and 2 parts of organic pigment.
The electromagnetic shielding function mesh fabric is composed of mesh fabric adhesive and electromagnetic shielding conductive fabric.
The mesh fabric adhesive comprises the following raw materials in parts by mass: 14 parts of polypropylene oxide polyalcohol (the average component is 3000), 8 parts of MDI adhesive, 4 parts of TDI adhesive, 3 parts of 1, 4-butanediol, 2 parts of dimethylbenzene and 10 parts of suspension-process polyvinyl chloride resin (the polymerization degree is 1100-1300).
The electromagnetic shielding conductive cloth is electro-silvered high-strength mesh cloth, and the electromagnetic shielding efficiency can reach more than 50dB in the frequency range of 300 MHz-20000 MHz.
The mesh of the high-strength nylon mesh cloth is 3 mm, and the yarn count is 100 Dx 100D.
The preparation method of the PVC sandwich mesh cloth specifically comprises the following steps:
step I: respectively preparing an upper adhesive film, a lower adhesive film and an electromagnetic shielding mesh;
step II: pressing the prepared upper adhesive film, the prepared lower adhesive film and the electromagnetic shielding function mesh cloth through a rolling laminating machine, wherein the temperature of a press roll is 140 ℃, the laminating rolling pressure is 3MPa, the laminating rolling speed is 6m/min, and the overall thickness of the mesh cloth is 1.2 mm;
step III: cooling the attached PVC net clamping cloth by a cooling roller;
step IV: cutting, inspecting and packaging according to specifications to obtain a finished product.
The preparation method of the upper adhesive film and the lower adhesive film comprises the following specific steps:
step 1: putting the raw materials of the upper adhesive film and the lower adhesive film into a high-speed stirrer according to the formula proportion, stirring at a low rotating speed, switching to high-speed stirring when the temperature is raised to 90 ℃, continuously heating to 110 ℃, stirring for 10 minutes, and then cooling to room temperature for later use;
step 2: filtering the material obtained in the step 1 to obtain pasty slurry;
and step 3: injecting the filtered pasty slurry into a roller press for rolling;
and 4, step 4: and (4) rolling and molding the material rolled in the step (3) by a rolling mill to obtain an upper adhesive film and a lower adhesive film, wherein the thickness of the adhesive film is 0.4 mm.
The preparation method of the mesh fabric with the electromagnetic shielding function comprises the following steps:
step a: putting polyoxypropylene polyol, MDI adhesive, TDI adhesive and 1, 4-butanediol into a high-speed stirrer according to a formula proportion, heating to 80 ℃ for reacting for 3 hours, cooling to room temperature, adding dimethylbenzene, stirring for 3 minutes, putting suspension method-polyvinyl chloride resin, heating to 80 ℃, and stirring for 0.6 hour to obtain the mesh fabric adhesive.
Step b: uniformly blade-coating the mesh fabric adhesive obtained in the step a on electromagnetic shielding conductive cloth through a cloth scraperThe dosage of the mesh fabric adhesive is controlled to be 45g/m2And then baked in a 70 ℃ horizontal oven at a speed of 5m/min for 0.8 hour. And obtaining the mesh fabric with the electromagnetic shielding function.
Example 3:
the flame-retardant PVC sandwich mesh fabric with the electromagnetic shielding function sequentially comprises an upper adhesive film, mesh fabric with the electromagnetic shielding function and a lower adhesive film from top to bottom.
The upper adhesive film and the lower adhesive film comprise the following raw materials in parts by mass: 42 parts of suspension method-polyvinyl chloride resin (with the polymerization degree of 1100-1300), 15 parts of phthalic diester, 6 parts of isophthalic diester, 3 parts of diisooctyl sebacate, 1 part of phenyl alkylsulfonate, 4 parts of aluminum hydroxide, 6 parts of octabromodiphenyl ether, 4 parts of toluene-diphenyl phosphate, 3 parts of light stabilizer HPT, 0.8 part of ultraviolet absorbent UV-P, 0.02 part of antibacterial mildew preventive and 3 parts of organic pigment.
The electromagnetic shielding function mesh fabric is composed of mesh fabric adhesive and electromagnetic shielding conductive fabric.
The mesh fabric adhesive comprises the following raw materials in parts by mass: 10 parts of polypropylene oxide polyalcohol (with the average molecular weight of 3000), 6 parts of MDI adhesive, 5 parts of TDI adhesive, 2 parts of 1, 4-butanediol, 3 parts of dimethylbenzene and 15 parts of suspension-process polyvinyl chloride resin (with the polymerization degree of 1100-1300).
The electromagnetic shielding conductive cloth is electroplated copper-nickel alloy high-strength mesh cloth, and the electromagnetic shielding efficiency can reach more than 30dB in the frequency range of 300 MHz-20000 MHz wave band.
The mesh of the high-strength nylon mesh cloth is 3 mm, and the yarn count is 100 Dx 100D.
Step I: respectively preparing an upper adhesive film, a lower adhesive film and an electromagnetic shielding mesh;
step II: pressing the prepared upper adhesive film, the prepared lower adhesive film and the electromagnetic shielding function mesh cloth through a rolling laminating machine, wherein the temperature of a press roll is 130 ℃, the laminating rolling pressure is 2.5MPa, the laminating rolling speed is 7m/min, and the integral thickness of the mesh cloth is 0.8 mm;
step III: cooling the attached PVC net clamping cloth by a cooling roller;
step IV: cutting, inspecting and packaging according to specifications to obtain a finished product.
The preparation method of the upper adhesive film and the lower adhesive film comprises the following specific steps:
step 1: adding the raw materials of the upper adhesive film and the lower adhesive film into a high-speed stirrer according to the formula proportion, stirring at a low rotating speed, stirring at a high speed when the temperature is increased to 80 ℃, continuously heating to 120 ℃, stirring for 10 minutes, and then cooling to room temperature for later use.
Step 2: and (3) filtering the material obtained in the step (1) to obtain pasty slurry.
And step 3: and injecting the filtered pasty slurry into a roller press for rolling.
And 4, step 4: and (4) rolling and molding the material rolled in the step (3) by a rolling machine. The thickness of the glue film is 0.3 mm.
The preparation method of the mesh fabric with the electromagnetic shielding function comprises the following steps:
step a: putting polyoxypropylene polyol, MDI adhesive, TDI adhesive and 1, 4-butanediol into a high-speed stirrer according to a formula proportion, heating to 90 ℃ for reacting for 2 hours, cooling to room temperature, adding dimethylbenzene, stirring for 5 minutes, putting suspension method-polyvinyl chloride resin, heating to 80 ℃, and stirring for 1 hour to obtain the mesh fabric adhesive.
Step b: uniformly coating the mesh fabric adhesive obtained in the step a on the electromagnetic shielding conductive fabric through a cloth scraper, wherein the using amount of the mesh fabric adhesive is controlled at 30g/m2And then baked in a 70 ℃ horizontal oven at a speed of 7m/min for 0.6 hour. And obtaining the mesh fabric with the electromagnetic shielding function.
Table 1 is a performance test of examples 1 to 3.
Table 1 examples performance test table
As can be seen from table 1, the PVC sandwich mesh fabric prepared in examples 1-3 has high tensile strength, tear strength and peel strength, and excellent physicochemical properties, and the electromagnetic shielding effectiveness can reach more than 30dB in the frequency range of 300MHz to 20000MHz, and can shield more than 99.9% of electromagnetic radiation; the flame retardant property can reach B1 level; meanwhile, the fabric has excellent performances of stretch resistance, tear resistance, light aging resistance, mildew resistance, cold resistance, heat resistance and the like, and is suitable for tent, inflatable membrane building and the like.
Claims (4)
1. The utility model provides a screen cloth is pressed from both sides to fire resistance PVC with electromagnetic shield function which characterized in that: sequentially comprises an upper adhesive film, an electromagnetic shielding mesh and a lower adhesive film from top to bottom;
the upper adhesive film and the lower adhesive film comprise the following raw materials in parts by mass: 40-50 parts of a suspension method-polyvinyl chloride resin, 15-20 parts of phthalic diester, 5-10 parts of isophthalic diester, 2-5 parts of diisooctyl sebacate, 1-2 parts of phenyl alkylsulfonate, 3-10 parts of aluminum hydroxide, 6-12 parts of octabromodiphenyl ether, 3-8 parts of toluene-diphenyl phosphate, 2-5 parts of a light stabilizer HPT, 0.1-0.8 part of an ultraviolet absorbent UV-P, 0.01-0.05 part of an antibacterial mildew preventive and 1-5 parts of an organic pigment;
the electromagnetic shielding function mesh fabric is composed of a mesh fabric adhesive and electromagnetic shielding conductive cloth;
the mesh fabric adhesive comprises the following raw materials in parts by mass: 10-15 parts of polyoxypropylene polyol, 6-10 parts of MDI (diphenyl-methane-diisocyanate) adhesive, 4-7 parts of TDI (toluene diisocyanate) adhesive, 2-4 parts of 1, 4-butanediol, 2-3 parts of xylene and 10-15 parts of suspension-process polyvinyl chloride resin;
the average molecular weight of the polyoxypropylene polyol is 3000;
the polymerization degree of the suspension method-polyvinyl chloride resin is 1100-1300.
2. The method for preparing flame-retardant PVC clip mesh cloth with electromagnetic shielding function according to claim 1, which comprises the following steps:
step I: respectively preparing an upper adhesive film, a lower adhesive film and an electromagnetic shielding mesh;
step II: pressing the prepared upper adhesive film, the prepared lower adhesive film and the electromagnetic shielding function mesh cloth through a rolling laminating machine, wherein the temperature of a press roll is 120-150 ℃, the laminating rolling pressure is 2-3 MPa, the laminating rolling speed is 4-8 m/min, and the whole thickness of the PVC sandwich mesh cloth is controlled to be 0.8-1.5 mm;
step III: cooling the attached PVC net clamping cloth by a cooling roller;
step IV: cutting, inspecting and packaging according to specifications to obtain a finished product.
3. The method for preparing flame-retardant PVC sandwich mesh cloth with electromagnetic shielding function according to claim 2, wherein the preparation of the upper adhesive film and the lower adhesive film comprises the following steps:
step 1: putting the raw materials of the upper adhesive film and the lower adhesive film into a high-speed stirrer according to a formula ratio, stirring at a low rotating speed, switching to high-speed stirring when the temperature rises to 80-100 ℃, continuously heating to 100-120 ℃, stirring for 6-10 minutes, and then cooling to room temperature for later use;
step 2: filtering the material obtained in the step 1 to obtain pasty slurry;
and step 3: injecting the filtered pasty slurry into a roller press for rolling;
and 4, step 4: and (3) rolling and molding the material rolled in the step (3) by a rolling mill to obtain an upper adhesive film and a lower adhesive film, wherein the thickness of the adhesive film is 0.2-0.4 mm.
4. The method for preparing the flame-retardant PVC clip mesh fabric with the electromagnetic shielding function according to claim 2, wherein the preparation of the mesh fabric with the electromagnetic shielding function comprises the following steps:
step a: putting polyoxypropylene polyol, MDI (diphenyl diisocyanate) adhesive, TDI (toluene diisocyanate) adhesive and 1, 4-butanediol into a high-speed stirrer according to a formula ratio, heating to 80-90 ℃, reacting for 2-3 hours, cooling to room temperature, adding xylene, stirring for 2-5 minutes, putting suspension method-polyvinyl chloride resin, heating to 80-90 ℃, and stirring for 0.5-1 hour to obtain a mesh fabric adhesive;
step b: uniformly blade-coating the mesh fabric adhesive obtained in the step a on the electromagnetic shielding conductive fabric through a cloth scraper, wherein the using amount of the mesh fabric adhesive is controlled to be 30-50 g/m2And then baking the screen cloth in a 50-70 ℃ horizontal oven at the speed of 3-5 m/min for 0.5-1 hour to obtain the screen cloth with the electromagnetic shielding function.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114752088A (en) * | 2022-03-31 | 2022-07-15 | 广东柏拉图塑胶有限公司 | Flame-retardant self-cleaning air-tight sandwich mesh cloth and preparation method thereof |
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| CN114752088A (en) * | 2022-03-31 | 2022-07-15 | 广东柏拉图塑胶有限公司 | Flame-retardant self-cleaning air-tight sandwich mesh cloth and preparation method thereof |
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