CN114685912B - Composite flame-retardant smoke-suppressing polyvinyl chloride film material - Google Patents

Composite flame-retardant smoke-suppressing polyvinyl chloride film material Download PDF

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CN114685912B
CN114685912B CN202210386098.3A CN202210386098A CN114685912B CN 114685912 B CN114685912 B CN 114685912B CN 202210386098 A CN202210386098 A CN 202210386098A CN 114685912 B CN114685912 B CN 114685912B
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polyvinyl chloride
flame
retardant smoke
film material
spinel
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CN114685912A (en
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叶华亦
叶峰灵
冉定林
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Zhejiang Jinda Membrane Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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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
    • C08J2327/02—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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances

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Abstract

The invention provides a spinel composite flame-retardant smoke-suppressing type polyvinyl chloride film material which is formed by plasticizing polyvinyl chloride slurry, wherein the polyvinyl chloride slurry comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 10-50 parts of modified flame-retardant smoke suppressant, 3-50 parts of spinel flame-retardant smoke suppressant, 40-80 parts of plasticizer and 0.3-10 parts of heat stabilizer. The invention adopts the modified flame-retardant smoke suppressant and the spinel flame-retardant smoke suppressant to carry out filling modification, and can synergistically promote the rapid decomposition of PVC in the combustion process to generate a large amount of HCl gas. HCl can dilute the oxygen concentration, and simultaneously reacts with the flame-retardant smoke suppressant to generate strong Lewis acid, so that the PVC is accelerated to crosslink and carbonize to form a compact carbon layer which is used as a physical barrier to isolate heat and oxygen transmission, and the flame-retardant smoke suppressant is improved. The addition of the spinel type flame-retardant smoke suppressant improves the low-temperature heat stability of the PVC film material, delays the early pyrolysis process of PVC and reduces the penetration of heat and oxygen.

Description

Composite flame-retardant smoke-suppressing polyvinyl chloride film material
Technical Field
The invention belongs to the technical field of flame-retardant smoke-suppression type film materials, and particularly relates to a composite flame-retardant smoke-suppression type polyvinyl chloride film material.
Background
Polyvinyl chloride (PVC) is a widely used thermoplastic material. Because of their excellent mechanical properties, physical properties, and high chemical and abrasion resistance, they are widely used in the fields of floors, rigid pipes, flexible hoses, conveyor belts, wires and cables, etc. The chlorine content of the pure polyvinyl chloride reaches 56.7%, so the pure polyvinyl chloride has good flame retardance. However, soft PVC becomes very flammable due to the addition of large amounts of plasticizers, ultimately producing large amounts of toxic and hazardous fumes. Thus, some conventional flame retardants such as chlorinated paraffin, antimony trioxide, halogen compounds, etc. are currently often used as flame retardants and smoke suppressants for PVC, but these flame retardants themselves are toxic and difficult to suppress smoke generation of PVC materials.
Therefore, development of environment-friendly high-efficiency flame-retardant smoke-suppressing soft PVC materials is imperative.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a composite flame-retardant smoke-suppressing polyvinyl chloride film material, which is added with a self-made non-toxic and environment-friendly modified flame-retardant smoke-suppressing agent and a spinel type flame-retardant smoke-suppressing agent, and has good flame-retardant smoke-suppressing effect.
The composite flame-retardant smoke-suppressing polyvinyl chloride film material is formed by plasticizing polyvinyl chloride slurry, and the polyvinyl chloride slurry comprises the following components in parts by weight:
Figure BDA0003593752740000011
preferably, the addition amount of the modified flame-retardant smoke suppressant is 10-25 parts per 100 parts of polyvinyl chloride by mass. More preferably 10 to 20 parts.
Preferably, the spinel type flame-retardant smoke suppressant is added in an amount of 3 to 25 parts by weight per 100 parts by weight of polyvinyl chloride. More preferably 3 to 7 parts.
Preferably, the plasticizer is added in an amount of 50 to 70 parts by mass per 100 parts by mass of polyvinyl chloride.
Preferably, the heat stabilizer is added in an amount of 2 to 6 parts by mass per 100 parts by mass of polyvinyl chloride.
Preferably, the spinel type flame-retardant smoke suppressant is one or more selected from aluminum spinel, iron spinel, zinc spinel, manganese spinel and chromium spinel. Further preferred is spinel type zinc ferrite.
Preferably, polyvinyl chloride paste resin is selected as polyvinyl chloride.
Preferably, the plasticizer is selected from one or more of dioctyl phthalate, dioctyl sebacate, epoxidized soybean oil and diisononyl phthalate. Further preferred are one or more of dioctyl phthalate, epoxidized soybean oil, diisononyl phthalate. Further preferred is dioctyl phthalate.
Preferably, the heat stabilizer is selected from one or a mixture of two of a calcium/zinc composite stabilizer and a barium/zinc composite stabilizer. Further preferred is a barium/zinc composite stabilizer.
Preferably, the polyvinyl chloride slurry is knife coated into a film, and plasticized for 10-20 min at 150-200 ℃ to obtain the polyvinyl chloride film material. Further preferably, the plasticizing temperature of the polyvinyl chloride film material is 160-180 ℃ and the plasticizing time is 13-17 min.
Preferably, the preparation process of the polyvinyl chloride slurry comprises the following steps:
and uniformly mixing polyvinyl chloride, a plasticizer, a heat stabilizer, a modified flame-retardant smoke suppressant and a spinel flame-retardant smoke suppressant to obtain the polyvinyl chloride slurry.
Preferably, the preparation method of the modified flame-retardant smoke suppressant comprises the following steps:
(1) Adding metal hydroxide into water for ultrasonic dispersion to obtain a first intermediate product;
(2) Respectively adding zinc sulfate and sodium stannate into the first intermediate, uniformly mixing, and reacting to obtain a second intermediate;
(3) And adding the second intermediate into water, then adding a modifier, uniformly mixing, adding metal salt, and reacting to obtain the modified flame-retardant smoke suppressant.
As a further preferred aspect, the metal oxide is one or more of magnesium hydroxide, aluminum hydroxide, layered double hydroxide, and the like. Further preferably magnesium hydroxide, which may be spherical, plate-like or rod-like. Further preferably, the magnesium hydroxide is in the form of a sheet, which is commercially available.
As a further preference, zinc sulfate: sodium stannate: the molar ratio of the metal hydroxide is (1-5): (1-5): (10-40). Further preferably (1 to 2): (1-2): (10-20).
As a further preferred aspect, the mass ratio of the modifier, the metal salt and the second intermediate product is (0.001 to 10): (0.001-20): (40-100). Further preferably (0.1 to 5): (0.1-10): (40-60).
More preferably, in the step (1), the ultrasonic dispersion time is 20 to 60 minutes. More preferably 20 to 40 minutes.
Further preferably, in step (2), zinc sulfate is added as its heptahydrate (ZnSO 4 ·7H 2 O) form;sodium stannate as its trihydrate (Na 2 SnO 3 ·3H 2 O) is added in the form of a powder.
More preferably, in the step (2), the reaction temperature is 25 to 80℃and the reaction time is 4 to 24 hours. More preferably, the reaction temperature is 25 to 60℃and the reaction time is 4 to 15 hours.
More preferably, in the step (2), the reaction is performed under stirring. Magnetic stirring is further preferred.
More preferably, in the step (2), after the reaction, the reaction solution is centrifuged, filtered and dried to obtain the second intermediate product. More preferably, the drying temperature is 60 to 120 ℃ and the drying time is 10 to 24 hours.
As a further preferred aspect, the modifier is one or more of Tannic Acid (TA), phytic acid, and dopamine. Further preferred is tannic acid.
More preferably, the metal salt is zinc sulfate, zinc nitrate (Zn (NO 3 ) 2 ) Zinc chloride (ZnCl) 2 ) Zinc acetate (C) 4 H 10 O 6 Zn) is provided. Further preferred is zinc sulphate and in its heptahydrate (ZnSO 4 ·7H 2 O) is added in the form of a powder.
More preferably, in the step (3), the reaction temperature is 25 to 80℃and the reaction time is 5 to 15 hours. Further preferably, the reaction temperature is 25 to 60℃and the reaction time is 8 to 12 hours.
More preferably, in the step (3), after the reaction is completed, the reaction solution is filtered and dried to obtain the modified flame-retardant smoke suppressant. Wherein the drying temperature is 60-120 ℃ and the drying time is 10-24 h.
According to the composite flame-retardant smoke-suppressing polyvinyl chloride film material, the modified flame-retardant smoke suppressor and the spinel flame-retardant smoke suppressor are used as the composite flame-retardant smoke suppressor for filling modification, the modified flame-retardant smoke suppressor and the spinel flame-retardant smoke suppressor both have good carbonization effects, so that PVC can be promoted to form a compact carbon layer, the addition of the spinel flame-retardant smoke suppressor improves the low-temperature stability of the PVC film material, delays the early pyrolysis process of PVC, and reduces the penetration of heat and oxygen. The modified flame-retardant smoke suppressant and the spinel flame-retardant smoke suppressant can synergistically promote PVC to decompose rapidly in the combustion process, and a large amount of HCl gas is generated. HCl gas can dilute the oxygen concentration, and simultaneously reacts with the modified flame-retardant smoke suppressant and the spinel flame-retardant smoke suppressant to generate strong Lewis acid, so that PVC crosslinking carbonization is accelerated to form a compact carbon layer which is used as a physical barrier to isolate heat and oxygen transmission, and the flame-retardant smoke suppressant performance is improved.
Compared with the prior art, the invention has the beneficial effects that:
according to the composite flame-retardant smoke-suppressing polyvinyl chloride film material, the nontoxic and environment-friendly modified flame-retardant smoke suppressor and the spinel type flame-retardant smoke suppressor are added into the polyvinyl chloride slurry for composite filling modification, so that the flame-retardant smoke suppressing performance of the polyvinyl chloride film material is effectively improved. The modified flame-retardant smoke suppressant is uniformly dispersed in a polyvinyl chloride matrix, is not easy to agglomerate and has good stability; the flame-retardant and smoke-suppressing performance of the polyvinyl chloride film material can be further improved by compounding the modified flame-retardant and smoke-suppressing agent with the spinel flame-retardant and smoke-suppressing agent, and particularly, the smoke-suppressing performance is greatly improved.
According to the modified flame-retardant smoke suppressant provided by the invention, zinc hydroxystannate is deposited on the surface of metal hydroxide to prepare the metal hydroxide-zinc hydroxystannate flame-retardant smoke suppressant, and then the organic modifier is used for modifying the metal hydroxide-zinc hydroxystannate to cover the surface of the metal hydroxide-zinc hydroxystannate, so that agglomeration of the flame-retardant smoke suppressant is effectively prevented, and the dispersibility of the flame-retardant smoke suppressant in a PVC matrix is improved; finally, the composite spinel type flame-retardant smoke suppressant further enhances the flame-retardant smoke suppression effect of the polyvinyl chloride film material.
Drawings
FIG. 1 is the infrared signature of magnesium hydroxide, a second intermediate, and a modified flame retardant smoke suppressant of example 1;
FIG. 2 is a microstructure of the modified flame retardant smoke suppressant prepared in example 1;
FIG. 3 is an SEM image of a cross section of a polyvinyl chloride film material prepared in example 1;
FIG. 4 is an SEM image of a cross section of a polyvinyl chloride film material prepared in comparative example 1;
FIG. 5 is an SEM image of the cross section of a polyvinyl chloride film material prepared in comparative example 2;
fig. 6 is an SEM image of a cross section of the polyvinyl chloride film material prepared in comparative example 3.
Detailed Description
The invention will be further elucidated with reference to the drawings and to specific embodiments. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The methods of operation, under which specific conditions are not noted in the examples below, are generally in accordance with conventional conditions, or in accordance with the conditions recommended by the manufacturer.
Example 1
1) Preparation of modified flame-retardant smoke suppressant:
(A) 2.9g MH (magnesium hydroxide, flake) was dispersed in 100mL water, and sonicated for 30min to give a first intermediate;
(B) 50ml of the mixture containing 0.01mol of ZnSO 4 ·7H 2 O and 0.01mol Na 2 SnO 3 ·3H 2 Adding the aqueous solution of O into the first intermediate, uniformly mixing, magnetically stirring at 60 ℃ for reaction for 4 hours, centrifuging after the reaction is finished, filtering, and drying at 80 ℃ for 12 hours to obtain a second intermediate (MH@ZHS).
(C) Adding 2g of the second intermediate into water, then dripping 0.017g of Tannic Acid (TA), uniformly mixing, and adding 0.24g of ZnSO 4 ·7H 2 O, reacting for 12 hours at 50 ℃, filtering after the reaction is finished, and drying for 12 hours at 80 ℃ to obtain the modified flame-retardant smoke suppressant (TA-MH@ZHS).
The infrared characterization of magnesium hydroxide, the second intermediate product and the modified flame retardant smoke suppressant is shown in figure 1.
At 3698cm in FIG. 1 -1 And 1635cm -1 The peak at which corresponds to the peak of the telescopic vibration absorption of the Mg-OH bond of MH, 3287cm -1 And 1176cm -1 The peak of (C) is the absorption peak of-OH in Zinc Hydroxystannate (ZHS) in MH@ZHS, 784cm -1 And 537cm -1 The characteristic absorption peaks of (2) correspond to vibrations of Zn-O and Sn-O, respectively, indicating that ZHS was successfully deposited on MH. 1349cm -1 ，1422cm -1 ，1560cm -1 C-O stretching vibration absorption peaks corresponding to TA in TA-MH@ZHS respectively, aromatic C=C stretching vibrationAbsorption peaks and c=o tensile vibration absorption peaks indicate that the surface of mh@zhs is effectively covered by the TA layer.
The microstructure of the modified flame-retardant smoke suppressant is shown in figure 2. As can be seen from fig. 2, the surface of the sheet MH successfully deposited the cubic particulate zinc hydroxystannate.
2) Respectively taking 100g of polyvinyl chloride paste resin, 11.25g of modified flame-retardant smoke suppressant, 3.75g of zinc ferrite (spinel type), 67g of dioctyl phthalate and 3g of barium/zinc stabilizer, and uniformly mixing and stirring to obtain polyvinyl chloride slurry;
3) And (3) scraping polyvinyl chloride slurry on a flat and smooth base material, and plasticizing for 15min at 165 ℃ to obtain the high-performance flame-retardant smoke-suppressing polyvinyl chloride film material.
The microscopic cross section of the high-performance flame-retardant smoke-suppressing polyvinyl chloride film material is shown in fig. 3, and as can be seen from fig. 3, the modified flame-retardant smoke suppressing agent and zinc ferrite which are uniformly distributed in the polyvinyl chloride film material show that the flame-retardant smoke suppressing agent prepared by the embodiment has good dispersibility in the polyvinyl chloride material.
Example 2
The difference with the example 1 is that 15g of modified flame-retardant smoke suppressant, 5g of zinc ferrite (spinel type) are added in the step 2), and the other steps and conditions are the same, so that the polyvinyl chloride film material is prepared.
Example 3
The difference from example 1 is that in step 2), 18.75g of modified flame-retardant smoke suppressant and 6.25g of zinc ferrite (spinel type) are added, and the other steps and conditions are the same, so that the polyvinyl chloride film material is prepared.
Comparative example 1
The difference with the example 1 is that the modified flame-retardant smoke suppressant and zinc ferrite are not added in the step 2), and the other steps and conditions are the same, so that the polyvinyl chloride film material is prepared. The microstructure of the obtained polyvinyl chloride film material is shown in figure 4. As can be seen from fig. 4, the pure PVC exhibits a uniform surface morphology and a smooth surface.
Comparative example 2
The difference from example 1 is that 7.5g of modified flame-retardant smoke suppressant, 7.5g of zinc ferrite (spinel type) are added in the step 2), and the other steps and conditions are the same, so that the polyvinyl chloride film material is prepared.
The microscopic cross section of the obtained polyvinyl chloride film material is shown in fig. 5. As can be seen from FIG. 5, the surface flame retardant of the polyvinyl chloride film has obvious agglomeration phenomenon, which indicates that zinc ferrite has poor dispersibility in the polyvinyl chloride matrix.
Comparative example 3
The difference from example 1 is that 15g of zinc ferrite (spinel type) is added in the step 2), and the other steps and conditions are the same, so as to prepare the polyvinyl chloride film material.
As can be seen from FIG. 6, the PVC film surface flame retardant (zinc ferrite) is in particle distribution, and has obvious agglomeration phenomenon.
Performance testing
The determination of the tensile properties of the plastics according to the standard GB/T1040.3-2006 (part 3), the determination of the combustion properties of the plastics according to the room temperature test GBT 2408-2021, the horizontal and vertical methods, ISO5659-2: plastic smoke generating property measurement (part 2): shan Yanxiang optical Density measurement the polyvinyl chloride film materials obtained in examples 1 to 3 and comparative examples 0 to 3 were tested for their overall properties, and the results are shown in Table 1.
Table 1 results of testing the overall properties of polyvinyl chloride film materials of examples 1 to 3 and comparative examples 1 to 3
Performance of Tensile Strength/MPa Elongation at break/% Vertical combustion Smoke density
Example 1 11.83 232.33 V-0 58.95
Example 2 10.55 227.67 V-0 57.53
Example 3 8.75 194.33 V-0 54.48
Comparative example 1 11.05 222.70 NR 181.87
Comparative example 2 9.86 186.67 NR 45.71
Comparative example 3 9.19 150.33 NR 41.11
As can be seen from Table 2, the tensile strength and elongation at break of the PVC film prepared in example 1 are both significantly improved over those of comparative examples 1 to 3, indicating that the total amount of the modified flame retardant smoke suppressant and zinc ferrite added per 100g of polyvinyl chloride has more excellent mechanical properties for PVC materials at a low content of 15g, because tannic acid modification increases the interaction between the flame retardant filler (flame retardant smoke suppressant) and the PVC matrix, and zinc ferrite is more easily dispersed when compounded at a low content, thus the compounded filler is more uniformly dispersed. The PVC films prepared in example 2 and example 3 have tensile strength and elongation at break which are lower than those of example 1 because the filler becomes difficult to disperse with increasing addition of the compounded flame retardant (modified flame retardant smoke suppressant and zinc ferrite), and thus the mechanical properties are lowered.
The flame retardant and smoke suppression performance of the PVC films prepared in examples 1 to 3 is remarkably improved compared with that of comparative example 1, and the vertical combustion of the PVC films prepared in examples 1 to 3 reaches V-0 grade, and the smoke density is reduced by more than half compared with that of the pure PVC film of comparative example 1, which shows that the PVC film prepared in the embodiment of the invention has good flame retardant and smoke suppression performance. The compounded flame retardant can be well dispersed in the PVC matrix, and the flame retardant efficiency of the flame retardant is improved to a certain extent. TA-MH@ZHS and ZnFeO 3 Has good carbonization effect, can promote PVC to form a compact carbon layer, and ZnFeO 3 The low-temperature stability of the PVC membrane material is improved, the early pyrolysis process of PVC is delayed, and the penetration of heat and oxygen is reduced. TA-MH@ZHS and ZnFeO 3 The PVC can be synergistically promoted to be rapidly decomposed in the combustion process, and a large amount of HCl gas is generated. HCl gas can dilute the oxygen concentration and simultaneously react with TAZn-MHS@ZHS and ZnFeO 3 The reaction generates strong Lewis acid, accelerates PVC crosslinking carbonization to form a compact carbon layer as a physical barrier to isolate heat and oxygen transmission, and improves the flame-retardant and smoke-suppressing performance.
The experimental results in table 1 show that the high-performance flame-retardant smoke-suppressing polyvinyl chloride film material provided by the embodiment of the invention has more excellent flame retardance, smoke suppression and mechanical properties, fills the blank in the field, and has obvious market competitiveness in the aspects of performance and manufacturing cost.
Further, it will be understood that various changes and modifications may be made by those skilled in the art after reading the foregoing description of the invention, and such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (9)

1. The composite flame-retardant smoke-suppressing type polyvinyl chloride film material is formed by plasticizing polyvinyl chloride slurry, and is characterized in that the polyvinyl chloride slurry comprises the following components in parts by weight:
100 parts of polyvinyl chloride
10 to 50 parts of modified flame-retardant smoke suppressant
3-50 parts of spinel type flame-retardant smoke suppressant
40-80 parts of plasticizer
0.3 to 10 parts of heat stabilizer
The preparation method of the modified flame-retardant smoke suppressant comprises the following steps:
(1) Adding metal hydroxide into water for ultrasonic dispersion to obtain a first intermediate product;
(2) Respectively adding zinc sulfate and sodium stannate into the first intermediate, uniformly mixing, and reacting to obtain a second intermediate;
(3) Adding the second intermediate into water, then adding a modifier, uniformly mixing, adding metal salt, and reacting to obtain the modified flame-retardant smoke suppressant;
the modifier is tannic acid.
2. The composite flame-retardant smoke-suppressing polyvinyl chloride film material according to claim 1, wherein the spinel flame-retardant smoke-suppressing agent is one or more selected from the group consisting of aluminum spinel, iron spinel, zinc spinel, manganese spinel, and chromium spinel.
3. The composite flame-retardant smoke-suppressing polyvinyl chloride film material according to claim 1, wherein the plasticizer is one or more selected from the group consisting of dioctyl phthalate, dioctyl sebacate, epoxidized soybean oil, and diisononyl phthalate.
4. The composite flame-retardant smoke-suppressing polyvinyl chloride film material according to claim 1, wherein the heat stabilizer is one or a mixture of two of a calcium/zinc composite stabilizer and a barium/zinc composite stabilizer;
the polyvinyl chloride is selected from polyvinyl chloride paste resin.
5. The composite flame-retardant smoke-suppressing polyvinyl chloride film material according to claim 1, wherein the polyvinyl chloride slurry is knife coated to form a film, and the polyvinyl chloride film material is obtained by plasticizing at 150-200 ℃.
6. The composite flame retardant smoke suppressant polyvinyl chloride film material of claim 1, wherein the metal oxide is one or more of magnesium hydroxide, aluminum hydroxide, layered double hydroxide.
7. The composite flame retardant smoke suppressant polyvinyl chloride film material of claim 1, wherein zinc sulfate: sodium stannate: the molar ratio of the metal hydroxide is (1-5): (1-5): (10-40).
8. The composite flame-retardant smoke-suppressing polyvinyl chloride film material according to claim 1, wherein the mass ratio of the modifier, the metal salt and the second intermediate product is (0.001-10): (0.001-20): (40-100).
9. The composite flame-retardant smoke-suppressing polyvinyl chloride film material according to claim 1, wherein the metal salt is one or more of zinc sulfate, zinc nitrate, zinc chloride and zinc acetate.
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