CN112321890B - Additive for PVC (polyvinyl chloride) plate, PVC plate, preparation method of PVC plate and PVC composite plate - Google Patents
Additive for PVC (polyvinyl chloride) plate, PVC plate, preparation method of PVC plate and PVC composite plate Download PDFInfo
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- CN112321890B CN112321890B CN202011259344.6A CN202011259344A CN112321890B CN 112321890 B CN112321890 B CN 112321890B CN 202011259344 A CN202011259344 A CN 202011259344A CN 112321890 B CN112321890 B CN 112321890B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions 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; Compositions of derivatives of such polymers
- C08L27/02—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2471/00—Floor coverings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
- B32B2607/02—Wall papers, wall coverings
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- 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
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- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Abstract
The invention discloses an additive for a PVC (polyvinyl chloride) plate, the PVC plate, a preparation method of the PVC plate and a PVC composite plate, and relates to the technical field of PVC plates. The additive for PVC sheet comprises 2-7 parts of flame retardant component and 0.5-6 parts of smoke suppressing component, wherein the flame retardant component is selected from Mg (OH) 2 And Al (OH) 3 At least one of the smoke suppressing components is selected from Zn 2 SnO 4 、ZnSn(OH) 6 、CoSn(OH) 6 And FeSnO (OH) 5 At least one of them. The additive for the PVC sheet is used as a raw material for preparing the PVC sheet, so that the prepared PVC sheet has low smoke density in burning, maintains good physical and chemical properties and improves the safety in the using process.
Description
Technical Field
The invention relates to the technical field of PVC (polyvinyl chloride) plates, in particular to an additive for a PVC plate, the PVC plate, a preparation method of the PVC plate and a PVC composite plate.
Background
Polyvinyl chloride (PVC) has been commonly used in flooring and wallboard, and PVC flooring and PVC wallboard has been used in a very wide range of applications. Along with popularization and application of PVC plates, more and more people pay more attention to the use safety of the PVC plates, and particularly the effects of flame retardance and smoke suppression. It is generally known that smoke is a direct cause of death in most fires, and thus suppression of smoke density (i.e., suppression of the total amount of smoke released during combustion) is a major concern.
However, the existing PVC wallboard or floor has the problem that the total release amount of smoke in the combustion process is too large.
Disclosure of Invention
The invention aims to provide an additive for PVC (polyvinyl chloride) plates, which aims to remarkably reduce the release amount of smoke during combustion of the PVC plates and improve the use safety coefficient.
The invention further aims to provide the PVC board and the preparation method thereof, which aim to reduce the smoke density of the PVC board and improve the safety in the use process.
The third object of the invention is to provide a PVC composite board which also has very low smoke density and is suitable for popularization and application.
The invention solves the technical problems by adopting the following technical scheme.
The invention provides an additive for PVC plates, which comprises 2-7 parts by weight of flame retardant component and 0.5-6 parts by weight of smoke suppression component, wherein the flame retardant component is selected from Mg (OH) 2 And Al (OH) 3 At least one of the smoke suppressing components is selected from Zn 2 SnO 4 、ZnSn(OH) 6 、CoSn(OH) 6 And FeSnO (OH) 5 At least one of them.
The invention also provides a PVC board, and the preparation raw materials of the PVC board comprise the additive for the PVC board.
The invention also provides a preparation method of the PVC board, which adopts the preparation raw materials of the PVC board for preparation.
The invention also provides a PVC composite board which comprises a PVC substrate layer, wherein the PVC substrate layer is the PVC board or the PVC board prepared by the preparation method.
The embodiment of the invention provides an additive for PVC boards, which has the beneficial effects that: the additive is formed by compounding the flame retardant component and the smoke suppression component, and is added into the raw materials for preparing the PVC sheet, so that the release amount of smoke during burning of the PVC sheet can be obviously reduced, and the use safety coefficient is improved.
It should be noted that: the magnesium hydroxide or the aluminum hydroxide has the effect of thermal decomposition, and can effectively reduce the aggregation of heat; the other four types of smoke-inhibiting materials can form an insulating layer covered on the surface of PVC, so that the smoke quantity can be effectively reduced.
The embodiment of the invention also provides a PVC board and a preparation method thereof, wherein the additive for the PVC board is used as a preparation raw material of the PVC board, so that the smoke density of the prepared PVC board is very low during combustion, and the safety in the use process is improved.
The embodiment of the invention also provides a PVC composite board, wherein the PVC substrate layer adopts the PVC board, and the PVC composite board is also reduced in smoke density during combustion and is suitable for popularization and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The additive for PVC plates, the preparation method thereof and the PVC composite board provided by the embodiment of the invention are specifically described below.
The embodiment of the invention provides an additive for PVC (polyvinyl chloride) plates, which comprises 2-7 parts by weight of flame retardant components and 0.5-6 parts by weight of smoke suppression components, wherein the flame retardant components are selected from Mg (OH) 2 And Al (OH) 3 At least one of the smoke suppressing components is selected from Zn 2 SnO 4 、ZnSn(OH) 6 、CoSn(OH) 6 And FeSnO (OH) 5 At least one of them.
Specifically, mg (OH) 2 And Al (OH) 3 All are commercially available flame-retardant grade materials, and the smoke suppression component is also a commercially available material.
It should be noted that: it is made of Mg (OH) 2 Or Al (OH) 3 The heat is used for dehydration, and the heat absorption effect generated in the process realizes flame retardance; h removed by heating of smoke suppressing material in initial combustion stage 2 O has the functions of diluting and cooling heat. Along with the continuous combustion of the matrix, oxides and chlorides generated by the reaction of HCl which is decomposed and removed by the PVC and smoke suppression materials not only have a certain physical shielding effect, but also can effectively catalyze the PVC to remove HCl faster, thereby leading the PVC to be crosslinked and carbonized earlier and covered on the matrixThe surface of the body ensures that the graphitization degree of the generated carbon residue is higher and denser, and can effectively isolate oxygen required by combustion and prevent combustible micromolecules from entering the PVC matrix. In addition, HCl removed in the combustion process can be used as a flame-retardant gas, so that the concentration of oxygen can be diluted, and free radicals such as hydrogen ions can be captured, and the chain reaction is stopped, so that the flame retardance and smoke suppression effects are achieved.
In particular, the flame retardant effect of aluminium hydroxide is mainly achieved by its dehydration by heating and by the endothermic effect produced in the process, which can be roughly divided into two phases: firstly, in the range of 210 ℃ to 370 ℃, aluminum hydroxide can rapidly lose a large amount of crystal water, and simultaneously absorb a large amount of heat, and the reaction equation is as follows:
when the temperature is further increased to 270-590 ℃, the aluminum hydroxide slowly loses a small amount of crystal water and absorbs a large amount of heat, and the reaction equation is as follows:
further, the flame retardant comprises 3-5 parts of flame retardant components and 1-4 parts of smoke suppression components in parts by weight; preferably, the flame retardant component is 3-5 parts and the smoke suppressing component is 1-3 parts. The inventor optimizes the consumption of the flame retardant component and the smoke suppression component, so that on one hand, the flame retardant and smoke suppression effects are improved, and on the other hand, the additive can effectively reduce the smoke amount on the premise of small consumption.
The additive for the PVC plate provided by the embodiment of the invention has high compounding efficiency, and can effectively reduce the smoke quantity in the PVC plate raw material with a small dosage. For example, if magnesium hydroxide or aluminum hydroxide is used in total, the total amount of the magnesium hydroxide or aluminum hydroxide is more than 50% (mass fraction, the same applies below) of the total amount of the PVC material to effectively reduce the smoke, and the excessive amount of the magnesium hydroxide or aluminum hydroxide affects the hardness of the product and increases the difficulty of processing; by adopting the compound additive in the application, the aim of effectively reducing the smoke amount can be achieved by the total dosage of 5 percent, and the overall physical and chemical properties of the base material can not be influenced.
The raw material parameters of the flame retardant component are shown in Table 1, and the raw material parameters of the smoke suppressing component are shown in Table 2.
TABLE 1 flame retardant component raw Material parameters
TABLE 2 Smoke suppressant component raw Material parameters
The embodiment of the invention provides a PVC board, which comprises the additive for the PVC board, preferably 20-25 parts by weight of PVC powder, 50-60 parts by weight of calcium powder and 1-3 parts by weight of chlorinated polyvinyl chloride. The proportion of the additive for the PVC sheet material in the raw materials is small, but the effects of flame retardance and smoke suppression are good, and the overall physical and chemical properties of the sheet material are excellent.
In the preferred embodiment of the invention, the preparation raw materials also comprise 1-5 parts of acrylic acid auxiliary agent, 0.1-1 part of PVC internal lubricant and 0.1-1 part of PVC external lubricant. The acrylic acid auxiliary agent can be polyacrylate with molecular weight of 8000-15000, etc., the PVC internal lubricant can be PE wax, and the PVC external lubricant can be fatty acid calcium or fatty acid zinc. The physical and chemical properties of the product are further optimized by further introducing acrylic acid auxiliary agent and lubricant.
In other embodiments of the invention, the PVC sheet may be referenced to existing stock, e.g., without the addition of acrylic aids, lubricants, etc., and replaced with conventional stock.
It should be added that the embodiment of the invention also provides a preparation method of the PVC sheet material, which adopts the raw materials for preparation, and the preparation method refers to the existing technology and is not repeated herein.
The embodiment of the invention also provides a PVC composite board, which comprises a PVC substrate layer, wherein the PVC substrate layer is the PVC board or the PVC board prepared by the preparation method, and the PVC substrate layer is used as a base material to be matched with other film layer structures to form the PVC composite board, such as a wallboard, a floor and the like.
In some embodiments, the PVC composite plate further comprises a wear layer and a color film layer, the wear layer and the color film layer being located on one side of the PVC substrate layer, and the color film layer being located between the wear layer and the PVC substrate layer. The wear-resistant layer and the color film layer are made of the existing materials, so that the PVC composite board is better in aesthetic property and wear resistance.
The wallboard is generally wearing layer, various rete and PVC base plate layer three-layer structure, if for the floor then still includes the buffer material layer and forms 4 layer structure, and the buffer material layer is located the PVC base plate layer and keeps away from one side of various rete.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Example 1
The present example provides an additive for PVC sheet material comprising, in parts by weight, al (OH) 3 4 parts and Zn 2 SnO 4 3 parts of Al (OH) 3 Particle diameter D50 is less than 15 μm, zn 2 SnO 4 The particle size distribution D98 satisfies less than 10. Mu.m.
Example 2
The present example provides an additive for PVC sheet material comprising, in parts by weight, al (OH) 3 3 parts and ZnSn (OH) 6 4 parts of Al (OH) 3 Particle diameter D50 is less than 15 μm, znSn (OH) 6 The particle size distribution D98 satisfies a particle size of less than 7.4. Mu.m.
Example 3
The present example provides an additive for PVC sheet material comprising, in parts by weight, al (OH) 3 5 parts and CoSn (OH) 6 1 part of Al (OH) 3 Particle diameter D50 is less than 15 μm, coSn (OH) 6 The particle size distribution D98 satisfies less than 5. Mu.m.
Example 4
The embodiment provides an additive for PVC boards, which comprises the following components in parts by weightA meter comprising Al (OH) 3 2 parts and FeSnO (OH) 5 6 parts of Al (OH) 3 Particle diameter D50 is less than 15 μm, feSnO (OH) 5 The particle size distribution D98 satisfies less than 5. Mu.m.
Example 5
The present example provides an additive for PVC sheet material comprising, in parts by weight, al (OH) 3 7 parts and Zn 2 SnO 4 0.5 part of Al (OH) 3 Particle diameter D50 is less than 15 μm, zn 2 SnO 4 The particle size distribution D98 satisfies less than 10. Mu.m.
Example 6
This example provides an additive for PVC sheets, differing from example 1 only in that: al (OH) 3 Replaced by equal amounts of Mg (OH) 2 。
Example 7
The embodiment provides a PVC sheet, which comprises 23 parts of PVC powder, 55 parts of calcium powder, 2 parts of chlorinated polyvinyl chloride, 3 parts of PA-40 (acrylic acid auxiliary), 0.5 part of polyethylene wax (inner lubricant) and 0.5 part of fatty acid zinc (outer lubricant) in parts by weight of the additive for the PVC sheet in the embodiment 1, wherein the standard parts by weight of the additive for the PVC sheet are the same.
The embodiment provides a method for preparing a PVC plate, which is prepared from the raw materials provided in the embodiment, and includes: after mixing the raw materials at 60℃for 30min, melt extrusion was performed.
The embodiment provides a preparation method of a PVC floor, which comprises the steps of performing film coating treatment on the PVC plate prepared in the embodiment, wherein the film coating treatment comprises a color film layer and a wear-resistant layer; cutting and backing.
Examples 8 to 12
Examples 8-12 all provide a PVC sheet and a method for preparing the same, which differ from example 7 only in that: the additives for PVC sheets in examples 8-12 were formulated according to examples 2-6, respectively.
In other embodiments, the amount of the PVC powder, calcium powder, etc. in the raw materials for preparing the PVC plate may be adjusted with reference to the restrictions in other parts of the specification of the present application, and is not limited to the specific amounts in example 7.
Comparative example 1
This comparative example provides a PVC sheet and a method for preparing the same, which is different from example 7 only in that: al (OH) 3 Instead of an equivalent amount of aluminum oxide.
Comparative example 2
This comparative example provides a PVC sheet and a method for preparing the same, which is different from example 7 only in that: zn is added 2 SnO 4 And replaced with an equivalent amount of molybdenum trioxide.
Comparative example 3
This comparative example provides a PVC sheet and a method for preparing the same, which is different from example 7 only in that: no Zn is added 2 SnO 4 And Al (OH) 3 To 30-40 parts.
Test examples
The PVC sheets prepared in examples 7 to 10 and comparative examples 1 to 3 were tested for smoke density and physicochemical properties by conventional methods, and the results are shown in Table 3.
Table 3 PVC sheet test results
| Group of | Substrate thickness | Smoke density | Hardness of |
| Example 7 | 5mm | 320 | 65D |
| Example 8 | 5mm | 300 | 65D |
| Example 9 | 5mm | 390 | 65D |
| Example 10 | 5mm | 420 | 65D |
| Comparative example 1 | 5mm | 465 | 65D |
| Comparative example 2 | 5mm | 440 | 65D |
| Comparative example 3 | 5mm | 430 | 85D |
As can be seen from the test data in table 3, the additive for PVC sheets provided in the examples of the present application can significantly reduce smoke density when the sheets are burned in the preparation of PVC sheets, and maintain good physicochemical properties.
In summary, the additive for the PVC sheet provided by the invention is formed by compounding the flame retardant component and the smoke suppression component, and is added into the preparation raw material of the PVC sheet, so that the release amount of smoke during combustion of the PVC sheet can be obviously reduced, and the use safety coefficient is improved.
The additive for the PVC sheet is used as a raw material for preparing the PVC sheet, so that the smoke density of the prepared PVC sheet is low during combustion, and the safety of the use process is improved.
The PVC substrate layer of the PVC composite board provided by the invention adopts the PVC plate, and the smoke density of the PVC composite board is reduced during combustion, so that the PVC composite board is suitable for popularization and application.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (5)
1. The PVC sheet is characterized in that the preparation raw materials comprise 3-5 parts by weight of an additive for the PVC sheet and 1-4 parts by weight of a flame retardant component and a smoke suppression component, wherein the flame retardant component is Al (OH) 3 The smoke suppressing component is selected from Zn 2 SnO 4 、ZnSn(OH) 6 And CoSn (OH) 6 At least one of (a) and (b);
the PVC plate additive comprises the following raw materials, by weight, 20-25 parts of PVC powder, 50-60 parts of calcium powder, 1-3 parts of chlorinated polyvinyl chloride, 1-5 parts of an acrylic acid auxiliary agent, 0.1-1 part of a PVC internal lubricant and 0.1-1 part of a PVC external lubricant;
the preparation method of the PVC board comprises the following steps: mixing the raw materials at 60 ℃ for 30min, and then carrying out melt extrusion;
the particle size of the flame retardant component satisfies a D50 of less than or equal to 15 μm;
in the smoke suppressing component, zn 2 SnO 4 The particle size distribution of (2) satisfies D98 small10 μm or less; znSn (OH) 6 The particle size distribution of (2) satisfies D98 of 7.4 μm or less; coSn (OH) 6 The particle size distribution of (2) satisfies D98 of less than or equal to 5 mu m.
2. A preparation method of a PVC sheet material is characterized in that the PVC sheet material is prepared by adopting the raw material for preparing the PVC sheet material according to claim 1.
3. A PVC composite board comprising a PVC substrate layer, wherein the PVC substrate layer is the PVC sheet of claim 1.
4. The PVC composite plate of claim 3 further comprising a wear layer and a color film layer, the wear layer and the color film layer being located on one side of the PVC substrate layer and the color film layer being located between the wear layer and the PVC substrate layer.
5. The PVC composite according to claim 4, further comprising a layer of cushioning material, wherein the layer of cushioning material is located on a side of the PVC substrate layer remote from the color film layer.
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| CN111761772A (en) * | 2020-05-26 | 2020-10-13 | 宜宾天亿新材料科技有限公司 | Preparation method of high-flame-retardant smoke-suppression LVT floor wear-resistant layer |
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