CN111718546A - Preparation method of material layer in high-flame-retardance smoke-suppression LVT floor - Google Patents
Preparation method of material layer in high-flame-retardance smoke-suppression LVT floor Download PDFInfo
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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
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- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
Abstract
The invention discloses a preparation method of a material layer in a high-flame-retardance smoke-suppression LVT floor, which comprises the following steps: (1) the production is carried out according to the following weight portionsRaw materials: 30-40 parts of polyvinyl chloride resin, 15-20 parts of plasticizer, 1-2 parts of stabilizer, 150-200 parts of flame-retardant smoke suppressant, 50-150 parts of calcium powder and 3-8 parts of processing aid; (2) mixing, banburying, open milling, rolling, cooling, drawing and discharging the production raw materials to obtain the high-flame-retardant smoke-inhibiting LVT floor middle material layer. According to the invention, through the proportioning of the components, the prepared middle material layer of the LVT floor has excellent flame-retardant and smoke-suppressing performances, meanwhile, the strength of the middle material layer is not lost, the strength and the hardness of the floor are maintained, and the radiation intensity of the middle material layer is respectively 25kW/m in a flameless mode2The average smoke density is less than 149, the strength is not less than 4.56, and the prepared LVT floor has excellent performance.
Description
Technical Field
The invention relates to the technical field of LVT floors, in particular to a preparation method of a material layer in a high-flame-retardant smoke-suppression LVT floor.
Background
The LVT (Luxury Vinyl Tile) floor is a PVC floor which is born in the American market, is generally called as a stone-plastic floor in China, is a high-grade environment-friendly building decoration and finishing material, has the advantages of wear resistance, water resistance, moisture resistance, ultraviolet resistance, acid-base corrosion resistance, good anti-skid property, safe and comfortable walking, environmental protection, easy pavement and the like, and in recent years, the LVT is the most favorable floor material in the market regardless of civil or commercial use; the LVT floor is widely accepted by consumers due to the characteristics of simulated appearance, vivid touch, environmental protection, easy pavement, high cost performance and the like. LVT floor is gradually becoming the best material to replace natural resources such as solid wood, ceramic tiles and the like in consumers' mind. The LVT floor is mainly made of polyvinyl chloride materials, and mainly comprises a wear-resistant layer, a color film layer, a middle material layer, a primer layer and the like from top to bottom.
Although the flame retardant performance of the conventional LVT floor can meet the fields of home furnishing, office places and the like, the flame retardant requirements of the fields of ship and rail transit and the like are difficult to meet (the standard ISO 5659, DIN 5510-2:2009-05 is adopted), because PVC which is a main raw material is difficult to combust, a large amount of plasticizer is added in the process of processing the floor, the flammability of PVC products is greatly improved, dense smoke is generated during combustion, if the LVT floor is applied to the fields of ship, rail transit and the like, the flame retardant and smoke suppression performance of the LVT floor must be further improved, the flame retardant and smoke suppression agent needs to be added, but the performance of the LVT floor is influenced by adding too much flame retardant and smoke suppression agent. The middle material layer is used as the middle layer of the LVT floor, the addition amount of the inorganic filler is more than that of the primer layer, and the composite floor mainly has the functions of improving the hardness of the composite floor, playing a role in supporting a framework and stabilizing the size of the floor. The material layer in the LVT floor is made of PVC material, although PVC is difficult to burn, a large amount of plasticizer is added in the floor processing process, so that the flammability of PVC products is greatly improved, thick smoke can be generated during burning, and the thick smoke contains a large amount of toxic and harmful substances (such as hydrogen chloride, benzene series and the like), thereby threatening the safety of life and property of people. In order to improve the flame-retardant and fireproof performance of the material layer in the LVT floor, the flame-retardant smoke inhibitor needs to be added into the formula of the middle material layer, but the strength and hardness of the middle material layer can be reduced after the flame-retardant smoke inhibitor is added, and the excellent performance of the LVT composite floor can be greatly reduced due to the fact that the hardness of the middle material layer is not enough. The composite flame-retardant floor with the publication number of CN106967259A has good flame-retardant and fireproof performance after the flame retardant is added, but the carbon fiber is added in the ingredients to improve the strength and the wear resistance of the composite floor, so that the manufacturing cost of the composite floor is improved. Therefore, in order to ensure the excellent performance of the high-flame-retardant smoke-suppressing LVT floor material, a material layer in the LVT composite floor, which has high strength and good flame-retardant performance, needs to be found.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a material layer in an LVT composite floor, which has high strength and good flame retardant property.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a material layer in a high flame-retardant smoke-suppressing LVT floor comprises the following steps:
(1) taking the following production raw materials in parts by weight: 30-40 parts of polyvinyl chloride resin, 15-20 parts of plasticizer, 1-2 parts of stabilizer, 150-200 parts of flame-retardant smoke suppressant, 50-150 parts of calcium powder and 3-8 parts of processing aid; the flame-retardant smoke suppressant consists of a metal hydroxide smoke suppressant, a borate smoke suppressant, a molybdate smoke suppressant and a char former;
(2) mixing, banburying, open milling, rolling, cooling, drawing and discharging the production raw materials to obtain the high-flame-retardant smoke-inhibiting LVT floor middle material layer.
Further, the metal hydroxide smoke suppressant is aluminum hydroxide, magnesium hydroxide or a combination of the aluminum hydroxide and the magnesium hydroxide.
Further, the flame-retardant smoke suppressant comprises the following components in parts by weight: 60-80 parts of aluminum hydroxide, 45-75 parts of magnesium hydroxide, 10-25 parts of borate smoke suppressant, 10-25 parts of molybdate smoke suppressant and 5-10 parts of char former.
Further, the step (2) specifically includes the following steps:
(21) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and the plasticizer into a mixer according to a production raw material formula, firstly mixing for 10-20 min at the temperature of 90-130 ℃, and then mixing for 5-10 min at the temperature of less than 50 ℃;
(22) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and banburying, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 3-10 min, and the banburying temperature is 130-150 ℃;
(23) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 165-185 ℃, and the open milling time is 2-5 min;
(24) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 170-180 ℃ through rollers to form a sheet;
(25) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
Furthermore, the plasticizer can be one or more of dioctyl terephthalate, epoxidized tetrahydrodioctyl phthalate and chlorinated paraffin.
Further, the stabilizer can be one or more of a calcium zinc stabilizer, an organic tin stabilizer and a rare earth stabilizer.
Furthermore, the calcium powder is nano calcium carbonate, and the calcium content is more than or equal to 90 percent.
Further, the processing aid is one or more of stearic acid, calcium stearate, CPE and carbon black.
The invention also discloses a high-flame-retardance smoke-suppression LVT floor middle material layer prepared by the preparation method.
The invention also discloses a high-flame-retardant smoke-suppression LVT floor which comprises the high-flame-retardant smoke-suppression LVT floor middle material layer.
The invention has the beneficial effects that: according to the invention, through the proportioning of the components, the prepared middle material layer of the LVT floor has excellent flame-retardant and smoke-suppressing performances, meanwhile, the strength of the middle material layer is not lost, the strength and the hardness of the floor are maintained, and the radiation intensity of the middle material layer is respectively 25kW/m in a flameless mode2The average smoke density is less than 149, the strength is not less than 4.56, and the prepared LVT floor has excellent performance.
Detailed Description
The present invention will be further described with reference to the following examples.
TABLE 1 raw material weight ratios of examples 1-5
| Polyvinyl chloride resin | Plasticizer | Flame-retardant smoke suppressant | Calcium powder | Stabilizer | Processing aid | |
| Example 1 | 34 | 15 | 150 | 25 | 1.5 | 6 |
| Example 2 | 34 | 16 | 160 | 25 | 1.5 | 6 |
| Example 3 | 34 | 17 | 170 | 25 | 1.5 | 6 |
| Example 4 | 34 | 18 | 180 | 30 | 1.5 | 6 |
| Example 5 | 34 | 20 | 200 | 30 | 1.5 | 6 |
TABLE 2 flame retardant for examples 1 to 5
TABLE 3 selection of additives for examples 1-5
| Plasticizer | Stabilizer | Processing aid | |
| Example 1 | DOTP | Calcium-zinc composite stabilizer | The mass ratio of chlorinated polyethylene to carbon black is 1: 1 |
| Example 2 | DOTP | Calcium-zinc composite stabilizer | The mass ratio of chlorinated polyethylene to carbon black is 1: 1 |
| Example 3 | DOTP | Calcium-zinc composite stabilizer | The mass ratio of chlorinated polyethylene to carbon black is 1: 1 |
| Example 4 | DOTP | Calcium-zinc composite stabilizer | The mass ratio of chlorinated polyethylene to carbon black is 1: 1 |
| Example 5 | DOTP | Calcium-zinc composite stabilizer | The mass ratio of chlorinated polyethylene to carbon black is 1: 1 |
TABLE 4 raw material quality ratio of control group 1-2
| Polyvinyl chloride resin | Flame retardant | Plasticizer | Stabilizer | Calcium powder | Processing aid | |
| Control group 1 | 34 | 180 | 18 | 1.5 | 30 | 6 |
| Control group 2 | 34 | 200 | 20 | 1.5 | 30 | 6 |
TABLE 5 additive selection for control groups 1-2
TABLE 6 Properties of the resulting middle layers of examples 1-5 and control
Example 1:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 15 parts of plasticizer, 1.5 parts of stabilizer, 60 parts of aluminum hydroxide, 60 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of ammonium octamolybdate, 10 parts of char forming agent and 25 parts of calcium powder;
(2) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 15min at the temperature of 100 ℃, and then mixing for 10min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 5min, and the internal mixing temperature is 140 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 175 ℃, and the open milling time is 5 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 175 ℃ through rollers to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 152.36 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 4.56 at normal temperature.
Example 2:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 16 parts of plasticizer, 1.5 parts of stabilizer, 65 parts of aluminum hydroxide, 65 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of ammonium octamolybdate, 10 parts of charring agent and 25 parts of calcium powder;
(2) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 20min at the temperature of 120 ℃, and then mixing for 5min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 3min, and the internal mixing temperature is 150 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 185 ℃, and the open milling time is 2 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 180 ℃ through a roller to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 148.64 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 4.63 at normal temperature.
Example 3:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 17 parts of plasticizer, 1.5 parts of stabilizer, 70 parts of aluminum hydroxide, 70 parts of magnesium hydroxide, 10 parts of zinc borate, 10 parts of ammonium octamolybdate, 10 parts of char forming agent and 25 parts of calcium powder.
(2) Mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 20min at the temperature of 90 ℃, and then mixing for 10min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 10min, and the internal mixing temperature is 130 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 165 ℃, and the open milling time is 5 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 170 ℃ through rollers to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 147.01 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 4.68 at normal temperature.
Example 4:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 18 parts of plasticizer, 1.5 parts of stabilizer, 70 parts of aluminum hydroxide, 70 parts of magnesium hydroxide, 15 parts of zinc borate, 15 parts of ammonium octamolybdate, 10 parts of char forming agent and 25 parts of calcium powder;
(2) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 15min at the temperature of 100 ℃, and then mixing for 10min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 5min, and the internal mixing temperature is 140 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 175 ℃, and the open milling time is 5 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 175 ℃ through rollers to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 146.75 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 5.02 at normal temperature.
Example 5:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 20 parts of plasticizer, 1.5 parts of stabilizer, 80 parts of aluminum hydroxide, 80 parts of magnesium hydroxide, 20 parts of zinc borate, 20 parts of ammonium octamolybdate, 10 parts of char forming agent and 25 parts of calcium powder;
(2) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 15min at the temperature of 100 ℃, and then mixing for 10min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 5min, and the internal mixing temperature is 140 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 175 ℃, and the open milling time is 5 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 175 ℃ through rollers to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 148.36 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 5.02 at normal temperature.
Comparative example 1:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 18 parts of plasticizer, 1.5 parts of stabilizer, 90 parts of aluminum hydroxide, 90 parts of magnesium hydroxide and 25 parts of calcium powder;
(2) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 15min at the temperature of 100 ℃, and then mixing for 10min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 5min, and the internal mixing temperature is 140 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 175 ℃, and the open milling time is 5 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 175 ℃ through rollers to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a middle material layer of the LVT floor.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 489.65 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 3.86 at normal temperature.
Comparative example 2:
(1) taking the following production raw materials in parts by weight: 34 parts of polyvinyl chloride, 20 parts of plasticizer, 1.5 parts of stabilizer, 70 parts of aluminum hydroxide, 70 parts of magnesium hydroxide, 60 parts of antimony trioxide and 25 parts of calcium powder;
(2) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and a plasticizer into a mixer according to a production raw material formula, firstly mixing for 15min at the temperature of 100 ℃, and then mixing for 10min at the temperature of less than 50 ℃;
(3) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and internal mixing, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 5min, and the internal mixing temperature is 140 ℃;
(4) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 175 ℃, and the open milling time is 5 min;
(5) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 175 ℃ through rollers to form a sheet;
(6) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a middle material layer of the LVT floor.
The obtained LVT floor middle material layer is made into a sample plate with the thickness of 10mm multiplied by 1mm and a sample strip with the thickness of 80mm multiplied by 10mm multiplied by 4mm, the prepared sheet material is measured for the flame retardant and smoke suppression performance of the bottom material layer according to ISO 5659-2 plastic-smoke generation-part 2 monomer smoke box method, and the test result is that the average smoke density Dm of the middle material layer sample is 522.17 when the radiation intensity is 25kW/m2 respectively in a flameless mode. And (3) carrying out notch impact test on the sample strip according to GB/T1043 'hard plastic simply supported beam impact test method', and obtaining the sample strip with the impact strength of 4.04 at normal temperature.
Claims (10)
1. A preparation method of a material layer in a high flame-retardant smoke-suppressing LVT floor is characterized by comprising the following steps:
(1) taking the following production raw materials in parts by weight: 30-40 parts of polyvinyl chloride resin, 15-20 parts of plasticizer, 1-2 parts of stabilizer, 150-200 parts of flame-retardant smoke suppressant, 50-150 parts of calcium powder and 3-8 parts of processing aid; the flame-retardant smoke suppressant consists of a metal hydroxide smoke suppressant, a borate smoke suppressant, a molybdate smoke suppressant and a char former;
(2) mixing, banburying, open milling, rolling, cooling, drawing and discharging the production raw materials to obtain the high-flame-retardant smoke-inhibiting LVT floor middle material layer.
2. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor according to claim 1 is characterized in that: the metal hydroxide smoke suppressant is aluminum hydroxide, magnesium hydroxide or a combination of the aluminum hydroxide and the magnesium hydroxide.
3. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor board according to the claim 1 or 2, characterized in that: the flame-retardant smoke suppressant comprises the following components in parts by weight: 60-80 parts of aluminum hydroxide, 45-75 parts of magnesium hydroxide, 10-25 parts of borate smoke suppressant, 10-25 parts of molybdate smoke suppressant and 5-10 parts of char former.
4. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor according to claim 1 is characterized in that: the step (2) specifically comprises the following steps:
(21) mixing: putting polyvinyl chloride resin, a plasticizer, a stabilizer, a flame-retardant smoke suppressant, calcium powder, a processing aid and the plasticizer into a mixer according to a production raw material formula, firstly mixing for 10-20 min at the temperature of 90-130 ℃, and then mixing for 5-10 min at the temperature of less than 50 ℃;
(22) banburying: feeding the uniformly mixed mixture into an internal mixer for heating and banburying, and hammering and turning the material in the internal mixer, wherein the hammering and turning time is 3-10 min, and the banburying temperature is 130-150 ℃;
(23) open mixing: conveying the internally mixed melt into an open mill for open milling, wherein the open milling temperature is 165-185 ℃, and the open milling time is 2-5 min;
(24) rolling: feeding the melt after the open milling into a calender, and calendering the melt at the temperature of 170-180 ℃ through rollers to form a sheet;
(25) and (3) cooling: and (4) drawing and discharging the obtained sheet material through a cooling roller to obtain a high-flame-retardant smoke-suppressing LVT floor middle material layer.
5. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor according to claim 1 is characterized in that: the plasticizer can be one or more of dioctyl terephthalate, epoxidized tetrahydrodioctyl phthalate and chlorinated paraffin.
6. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor according to claim 1 is characterized in that: the stabilizer can be one or more of calcium zinc stabilizer, organic tin stabilizer and rare earth stabilizer.
7. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor according to claim 1 is characterized in that: the calcium powder is nano calcium carbonate, and the calcium content is more than or equal to 90 percent.
8. The preparation method of the material layer in the high flame-retardant smoke-suppressing LVT floor according to claim 1 is characterized in that: the processing aid is one or more of stearic acid, calcium stearate, CPE and carbon black.
9. The high flame-retardant smoke-suppressing LVT floor middle material layer prepared by the preparation method of the high flame-retardant smoke-suppressing LVT floor middle material layer according to any one of claims 1 to 8.
10. The utility model provides a high fire-retardant presses down cigarette LVT floor which characterized in that: the high flame retardant and smoke suppressant LVT floor comprises a high flame retardant and smoke suppressant LVT floor middle layer of claim 9.
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| CN114232938A (en) * | 2021-12-24 | 2022-03-25 | 大块建材开发(江苏)有限公司 | Flame-retardant and combustion low-smoke low-toxicity-gas floor and preparation method thereof |
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