CN116694003A - Low-cost high-flame-retardance polyvinyl chloride composite material, preparation method and application - Google Patents
Low-cost high-flame-retardance polyvinyl chloride composite material, preparation method and application Download PDFInfo
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- CN116694003A CN116694003A CN202310893562.2A CN202310893562A CN116694003A CN 116694003 A CN116694003 A CN 116694003A CN 202310893562 A CN202310893562 A CN 202310893562A CN 116694003 A CN116694003 A CN 116694003A
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- flame
- polyvinyl chloride
- composite material
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- retardance
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 99
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 99
- 239000002131 composite material Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title abstract description 24
- 239000003063 flame retardant Substances 0.000 claims abstract description 58
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000004014 plasticizer Substances 0.000 claims abstract description 28
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 27
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 26
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 26
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 26
- 239000000314 lubricant Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 69
- 238000002156 mixing Methods 0.000 claims description 25
- -1 polytetrafluoroethylene Polymers 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 21
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 16
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 11
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical group [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- 238000007605 air drying Methods 0.000 claims description 10
- 239000000378 calcium silicate Substances 0.000 claims description 10
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 10
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000391 magnesium silicate Substances 0.000 claims description 10
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 10
- 235000019792 magnesium silicate Nutrition 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 235000012424 soybean oil Nutrition 0.000 claims description 10
- 239000003549 soybean oil Substances 0.000 claims description 10
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical group [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 8
- 239000000460 chlorine Substances 0.000 claims description 8
- 229910052801 chlorine Inorganic materials 0.000 claims description 8
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical group [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 8
- 239000000347 magnesium hydroxide Substances 0.000 claims description 8
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 208000035217 Ring chromosome 1 syndrome Diseases 0.000 abstract 1
- 238000009775 high-speed stirring Methods 0.000 description 17
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 12
- 238000011049 filling Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
Classifications
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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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
-
- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The application relates to the technical field of polyvinyl chloride composite materials, in particular to a low-cost high-flame-retardance polyvinyl chloride composite material, a preparation method and application. The polyvinyl chloride composite material with low cost and high flame retardance comprises the following components: 100 parts of PVC powder, 5-15 parts of chlorinated polyethylene, 3-10 parts of flame retardant, 1-5 parts of flame retardant synergist and a ring1 to 8 parts of plasticizer, 0.1 to 0.4 part of anti-dripping agent, 10 to 15 parts of filler, 2 to 5 parts of heat stabilizer, 0.1 to 1 part of lubricant and 0.1 to 1 part of antioxidant; the polyvinyl chloride composite material has the advantages of low preparation cost, low carbon, environment protection, excellent flame retardant property, good mechanical property, tensile strength of 50-65 MPa and notch impact strength of 26-32KJ/m 2 Therefore, the method has good market application value and can be widely applied to the field of refrigerator back plates.
Description
Technical Field
The application relates to the technical field of polyvinyl chloride composite materials, in particular to a low-cost high-flame-retardance polyvinyl chloride composite material, a preparation method and application.
Background
Polyvinyl chloride (Polyvinyl chloride), abbreviated as PVC in English, is a polymer prepared by polymerizing Vinyl Chloride Monomer (VCM) under the action of initiator such as peroxide and azo compound or light and heat according to free radical polymerization reaction mechanism. Pure polyvinyl chloride resins are hard thermoplastic materials with decomposition temperatures very close to the plasticizing temperature and poor mechanical strength. Therefore, the polyvinyl chloride resin cannot be used for molding products, and plasticizers, stabilizers, fillers and the like must be added to improve the performance, so that the polyvinyl chloride composite material is prepared and then processed into various products. At present, the polyvinyl chloride composite material is widely applied to various technical fields because of the advantages of strong durability, corrosion resistance, good insulativity, easy processing, recoverability and the like.
The back plate of the refrigerator is positioned at the back of the refrigerator, and has the function of preventing dust and dirt from entering, and promotes heat dissipation so as to ensure the refrigeration efficiency of the refrigerator. The refrigerator backboard on the market is generally made of galvanized steel plates, and the backboard has the problems of complex processing technology, high production cost and the like, and the refrigerator backboard made of the galvanized steel plates also has the defect of easy corrosion due to metal materials, and needs to be subjected to electroplating, spraying and other process treatment in the processing process, thereby causing the problem of environmental pollution.
Therefore, at present, a refrigerator backboard manufactured by processing a PVC composite material exists on the market, and the refrigerator backboard can basically meet the application requirements of the refrigerator backboard in mechanical strength, but the flame retardant effect of the refrigerator backboard is general and only reaches UL94-V-1 level. The Chinese patent publication No. CN114854143A discloses a flame-retardant PVC composite material for a refrigerator backboard and a preparation method thereof, in the application, antimony trioxide, an organotin stabilizer, dioctyl terephthalate and other modified PVC are added, and the flame retardance of the prepared PVC composite material can reach UL94-V-0 level, but the flame retardance is modified by adopting antimony trioxide, an organotin stabilizer, dioctyl terephthalate and other materials, so that the flame retardance still cannot reach a higher flame retardance level of 5VA, and the wide application of the material and the refrigerator backboard is greatly limited.
Disclosure of Invention
Aiming at the prior art problems. The application provides a polyvinyl chloride composite material with low cost and high flame retardance and a preparation method thereof.
In order to achieve the technical purpose, the technical scheme provided by the application is as follows:
a low-cost high-flame-retardance polyvinyl chloride composite material, which comprises the following components: 100 parts of PVC powder, 5-15 parts of chlorinated polyethylene, 3-10 parts of flame retardant, 1-5 parts of flame retardant synergist, 1-8 parts of environment-friendly plasticizer, 0.1-0.4 part of anti-dripping agent, 10-15 parts of filler, 2-5 parts of heat stabilizer, 0.1-1 part of lubricant and 0.1-1 part of antioxidant.
Preferably, the polyvinyl chloride composite material comprises the following components: 100 parts of PVC powder, 8-12 parts of chlorinated polyethylene, 4-8 parts of flame retardant, 2-5 parts of flame retardant synergist, 2-6 parts of environment-friendly plasticizer, 0.1-0.3 part of anti-dripping agent, 10-13 parts of filler, 3-5 parts of heat stabilizer, 0.1-0.5 part of lubricant and 0.1-1 part of antioxidant.
Preferably, the viscosity number of the PVC powder is 107-118 ml/g, the apparent density is 0.42-0.43 g/ml, the whiteness is 70-78%, and the volatile is 0.40-0.50%.
Preferably, the tensile strength of the chlorinated polyethylene is 6-8 MPa, the elongation at break is 700-900%, the volatile content is 0.05-0.1%, and the chlorine content is 34.0-36.0%.
Preferably, the flame retardant is zinc borate, the powder mesh is 1250-2500 mesh, and the purity is 98.0-99.0%.
Preferably, the flame retardant synergist is a mixture of calcium silicate and magnesium silicate, and the mixing ratio of the calcium silicate to the magnesium silicate is 1:1-1:2.
Preferably, the environment-friendly plasticizer is environment-friendly epoxidized soybean oil, the epoxy value content of the environment-friendly epoxidized soybean oil is 6.0-8.0%, the ash content is 0.05-0.10%, and the density is 0.985-0.990 g/cm < 3 >.
Preferably, the anti-dripping agent is polytetrafluoroethylene micro powder, the molecular weight of the polytetrafluoroethylene micro powder is 500-800 ten thousand, the mesh number is 200-500 mesh, and the purity is 98.0-99.0%.
Preferably, the heat stabilizer is a calcium-zinc stabilizer, and the melting point of the calcium-zinc stabilizer is 80-120 ℃; the bulk density is 0.40-0.50 g/cm3, and the heating decrement is 2.0-3.0%.
Preferably, the filler is magnesium hydroxide or aluminum hydroxide, the mesh number of the magnesium hydroxide or the aluminum hydroxide is 1250-2500 meshes, and the purity is 95.0-98.0%.
Preferably, the lubricant is polyethylene wax, the viscosity average molecular weight of the polyethylene wax is 4000-5000, and the melting point is 102.0-105.0 ℃.
Preferably, the antioxidant is antioxidant 1010, the purity of the antioxidant 1010 is 97-99%, the granularity is 50-100 microns, and the optimal scheme is 98-99% and the granularity is 50-80 microns.
The high-flame-retardance polyvinyl chloride composite material has the following advantages:
(1) In the combustion process of PVC, the zinc borate serving as a flame retardant is decomposed to generate diboron trioxide to form a layer of glass-shaped substance, the glass-shaped substance is covered on the surface of the polymer to play a role in inhibiting residual ash, and zinc compounds generated by decomposition exist in a coacervation phase to catalyze PVC to remove HCL and promote crosslinking, so that the char yield is improved, the combustion is prevented from continuing, the flame retardant efficiency can be further improved by the flame retardant synergist, and the flame retardant effect is better.
(2) The low-cost high-flame-retardance polyvinyl chloride composite material provided by the application has the advantages that the flame retardance grade can reach 5VA grade, and the use of an expensive antimonous oxide flame retardant containing heavy metal antimony, an expensive toxic tin-containing heat stabilizer and the like is avoided, so that the cost of the PVC composite material can be reduced, and the PVC composite material is low-carbon, green and environment-friendly and has excellent flame retardance.
(3) The polyvinyl chloride composite material with low cost and high flame retardance provided by the application has good mechanical property, the tensile strength reaches 50-65 MPa, and the notch impact strength is 26-32KJ/m 2 。
The preparation method of the low-cost high-flame-retardance polyvinyl chloride composite material comprises the following steps:
s1: firstly, placing the measured PVC powder into a high-speed stirrer, then adding the measured environment-friendly plasticizer, and stirring to fully mix the materials;
s2: then continuously adding the measured chlorinated polyethylene, the measured flame retardant synergist, the measured anti-dripping agent, the measured filler, the measured heat stabilizer, the measured lubricant and the measured antioxidant into the high-speed stirrer according to the proportion, stirring the materials, and obtaining a mixed material after the materials are fully mixed;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material.
The preparation method has the following advantages: the compounding process and the processing process are simple, and the processing preparation is easy.
A refrigerator backboard is made of the low-cost high-flame-retardance polyvinyl chloride composite material.
The refrigerator backboard has the following advantages:
compared with a refrigerator backboard adopting galvanized steel plates, the problems that the metal backboard is complex in processing technology, high in production cost, easy to corrode in metal materials and the like are avoided, and meanwhile, the refrigerator backboard does not need to be subjected to electroplating, spraying and other technological treatments which are easy to pollute the environment. Not only has high production efficiency and lower cost, but also has the environment-friendly characteristic, thereby leading the competitiveness of the product to be stronger.
Detailed Description
Example 1
The polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard has the composition shown in table 1:
table 1: unit (kg)
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 70%, volatile matter: 0.40%;
chlorinated Polyethylene (CPE): tensile strength: 6MPa, elongation at break: 700%, volatile matter: 0.05%, chlorine content: 34.0%;
flame retardant: zinc borate, powder mesh number: 1250 mesh, purity: 98.0%;
flame retardant synergist: calcium silicate and magnesium silicate in a weight ratio of 1:1, mixing;
an environment-friendly plasticizer: environmental protection epoxidized soybean oil, epoxy value: 6.0%, ash: 0.05% and a density of 0.985g/cm 3 ；
Anti-drip agent: polytetrafluoroethylene micropowder with molecular weight 500 ten thousand, mesh number: 200 mesh, purity: 98.0%;
filling: magnesium hydroxide, mesh number: 1250 mesh, purity 95.0%;
heat stabilizer: calcium zinc stabilizer, melting point: bulk density at 80 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 4000, melting point: 102.0 ℃;
an antioxidant: antioxidant 1010, 97% pure and 50 μm particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered environment-friendly plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s2: then continuously adding metered chlorinated polyethylene, a flame retardant synergist, an anti-dripping agent, a filler, a heat stabilizer, a lubricant and an antioxidant into a high-speed stirrer according to a proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying and cutting the extruded materialAnd granulating and drying to obtain the polyvinyl chloride composite material with low cost and high flame retardance. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 200rpm, and the vacuum degree is-0.80 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 165 c,
two zone temperature: 170 c,
three zone temperatures: 175 c,
four zone temperature: 180 c,
five zone temperature: 175 c,
temperature of the machine head: 170 ℃.
Example 2
The polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard has the following composition shown in table 2:
table 2: unit (kg)
Wherein:
PVC powder: number of viscosity: 118ml/g, apparent density: 0.43g/ml, whiteness: 78%, volatile matter: 0.50%;
chlorinated Polyethylene (CPE): tensile strength: 8MPa, elongation at break: 900%, volatile matter: 0.1%, chlorine content: 36.0%;
flame retardant: zinc borate, powder mesh number: 2500 mesh, purity: 99.0%;
flame retardant synergist: the calcium silicate and the magnesium silicate are mixed according to the weight ratio of 1:2;
an environment-friendly plasticizer: environmental protection epoxidized soybean oil, epoxy value: 8.0%, ash: 0.10% and a density of 0.990g/cm 3 ；
Anti-drip agent: polytetrafluoroethylene micropowder with molecular weight 800 ten thousand and mesh number: 500 mesh, purity: 99.0%;
filling: aluminum hydroxide, mesh number: 2500 mesh, purity 98.0%;
heat stabilizer: calcium zinc stabilizer, melting point:bulk density at 120 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 5000, melting point: 105.0 ℃;
an antioxidant: antioxidant 1010, 99% pure, 100 microns in particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered environment-friendly plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 10 minutes, and the rotating speed is 1500rpm;
s2: then continuously adding metered chlorinated polyethylene, a flame retardant synergist, an anti-dripping agent, a filler, a heat stabilizer, a lubricant and an antioxidant into a high-speed stirrer according to a proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high-speed stirring time is 10 minutes, and the rotating speed is 1500rpm;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 500rpm, and the vacuum degree is-0.90 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 170 c,
two zone temperature: 175 c,
three zone temperatures: 180 c,
four zone temperature: 185 c,
five zone temperature: 180 c,
temperature of the machine head: 175 ℃.
Example 3
The polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard has the composition shown in table 3:
table 3: unit (kg)
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 70%, volatile matter: 0.40%;
chlorinated Polyethylene (CPE): tensile strength: 6MPa, elongation at break: 700%, volatile matter: 0.05%, chlorine content: 34.0%;
flame retardant: zinc borate, powder mesh number: 1250 mesh, purity: 98.0%;
flame retardant synergist: the calcium silicate and the magnesium silicate are mixed according to the weight ratio of 1:1;
an environment-friendly plasticizer: environmental protection epoxidized soybean oil, epoxy value: 6.0%, ash: 0.05% and a density of 0.985g/cm 3 ；
Anti-drip agent: polytetrafluoroethylene micropowder with molecular weight 500 ten thousand, mesh number: 200 mesh, purity: 98.0%;
filling: aluminum hydroxide, mesh number: 1250 mesh, purity 95.0%;
heat stabilizer: calcium zinc stabilizer, melting point: bulk density at 80 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 4000, melting point: 102.0 ℃;
an antioxidant: antioxidant 1010, 98% pure and 50 microns in particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered environment-friendly plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s2: then continuously adding metered chlorinated polyethylene, a flame retardant synergist, an anti-dripping agent, a filler, a heat stabilizer, a lubricant and an antioxidant into a high-speed stirrer according to a proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 300rpm, and the vacuum degree is-0.80 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 165 c,
two zone temperature: 170 c,
three zone temperatures: 175 c,
four zone temperature: 180 c,
five zone temperature: 175 c,
temperature of the machine head: 170 ℃.
Example 4
The polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard has the composition shown in table 4:
table 4: unit (kg)
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 78%, volatile matter: 0.50%;
chlorinated Polyethylene (CPE): tensile strength: 8MPa, elongation at break: 900%, volatile matter: 0.1%, chlorine content: 36.0%;
flame retardant: zinc borate, powder mesh number: 2500 mesh, purity: 99.0%;
flame retardant synergist: the calcium silicate and the magnesium silicate are mixed according to the weight ratio of 1:2;
an environment-friendly plasticizer: environmental protection epoxidized soybean oil, epoxy value: 8.0%, ash: 0.10% and a density of 0.990g/cm 3 ；
Anti-drip agent: polytetrafluoroethylene micropowder with molecular weight 800 ten thousand and mesh number: 500 mesh, purity: 99.0%;
filling: magnesium hydroxide, mesh number: 2500 mesh, purity 98.0%;
heat stabilizer: calcium zinc stabilizer, melting point: bulk density at 120 ℃): 0.50g/cm 3 Heating and reducing: 3.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 5000, melting point: 105.0 ℃;
an antioxidant: antioxidant 1010, 99% pure and 80 μm particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered environment-friendly plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 8 minutes, and the rotating speed is 1500rpm;
s2: then continuously adding metered chlorinated polyethylene, a flame retardant synergist, an anti-dripping agent, a filler, a heat stabilizer, a lubricant and an antioxidant into a high-speed stirrer according to a proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high-speed stirring time is 8 minutes, and the rotating speed is 1500rpm;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 400rpm, and the vacuum degree is-0.90 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 170 c,
two zone temperature: 175 c,
three zone temperatures: 180 c,
four zone temperature: 185 c,
five zone temperature: 180 c,
temperature of the machine head: 175 ℃.
Example 5
The polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard has the composition shown in table 5:
table 5: unit (kg)
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 70%, volatile matter: 0.40%;
chlorinated Polyethylene (CPE): tensile strength: 6MPa, elongation at break: 700%, volatile matter: 0.05%, chlorine content: 34.0%;
flame retardant: zinc borate, powder mesh number: 1250 mesh, purity: 98.0%;
flame retardant synergist: the calcium silicate and the magnesium silicate are mixed according to the weight ratio of 1:1;
an environment-friendly plasticizer: environmental protection epoxidized soybean oil, epoxy value: 6.0%, ash: 0.05% and a density of 0.985g/cm 3 ；
Anti-drip agent: polytetrafluoroethylene micropowder with molecular weight 500 ten thousand, mesh number: 200 mesh, purity: 98.0%;
filling: magnesium hydroxide, mesh number: 1250 mesh, purity 95.0%;
heat stabilizer: calcium zinc stabilizer, melting point: bulk density at 120 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 4000, melting point: 102.0 ℃;
an antioxidant: antioxidant 1010, 99% pure and 50 μm particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered environment-friendly plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s2: then continuously adding metered chlorinated polyethylene, a flame retardant synergist, an anti-dripping agent, a filler, a heat stabilizer, a lubricant and an antioxidant into a high-speed stirrer according to a proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 300rpm, and the vacuum degree is-0.80 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 165 c,
two zone temperature: 170 c,
three zone temperatures: 175 c,
four zone temperature: 180 c,
five zone temperature: 175 c,
temperature of the machine head: 170 ℃.
Example 6
The polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard has the composition shown in table 6:
table 6: unit (kg)
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 70%, volatile content: 0.40%;
chlorinated Polyethylene (CPE): tensile strength: 6MPa, elongation at break: 700%, volatile content: 0.05%, chlorine content: 34.0%;
flame retardant: zinc borate, powder mesh number: 1250 mesh, purity: 98.0%;
flame retardant synergist: the calcium silicate and the magnesium silicate are mixed according to the weight ratio of 1:1.5;
an environment-friendly plasticizer: environmental protection epoxidized soybean oil, epoxy value: 6.0%, ash: 0.05% and a density of 0.985g/cm 3 ；
Anti-drip agent: polytetrafluoroethylene micropowder with molecular weight 500 ten thousand, mesh number: 200 mesh, purity: 98.0%;
filling: aluminum hydroxide, mesh number: 1250 mesh, purity 95.0%;
heat stabilizer: calcium zinc stabilizer, melting point: bulk density at 120 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 4000, melting point: 102.0 ℃;
an antioxidant: antioxidant 1010, 99% pure and 50 μm particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered environment-friendly plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s2: then continuously adding metered chlorinated polyethylene, a flame retardant synergist, an anti-dripping agent, a filler, a heat stabilizer, a lubricant and an antioxidant into a high-speed stirrer according to a proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high speed stirring time was 5 minutes at a speed of 1300rpm.
S3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 300rpm, and the vacuum degree is-0.90 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 165 c,
two zone temperature: 170 c,
three zone temperatures: 175 c,
four zone temperature: 180 c,
five zone temperature: 175 c,
temperature of the machine head: 170 ℃.
In the 6 above examples, when preparing the polyvinyl chloride composite material: (1) The high-speed stirring time and the rotating speed of the high-speed stirrer can be adjusted in real time according to the mixing condition of materials, and the stirring time of the mixed materials is about 5-10 minutes, preferably 5-8 minutes, according to the using amount in the embodiment, and the rotating speed of the stirrer is 1300-1500 rpm; in practical application, if the total amount of the mixture is reduced or increased, the mixing and stirring time and the rotating speed can be adjusted practically. (2) The temperature setting of the twin-screw extruder can be specifically set according to the model selected, and since the twin-screw extruder with 6 temperature zone controls is adopted in the above embodiment, the temperature control of the 6 temperature zones is performed, and the temperature ranges of the zones of the twin-screw extruder can be: a zone temperature: 165-170 ℃, two-zone temperature: 170-175 ℃, three-zone temperature: 175-180 ℃, four-zone temperature: 180-185 ℃, five-zone temperature: 175-180 ℃, and the temperature of a machine head: 170-175 ℃. In practical application, the extruder on the market has a model with only 4 temperature zone controls, and the extruder can be applied to the preparation method as well, and only needs to perform reasonable temperature setting according to the working procedure zone of the extruder. (3) The screw rotation speed of the twin-screw extruder is preferably 200-500 rpm, and the vacuum degree is preferably-0.8 to-1.0 Kgf/cm 2 。
Comparative example 1
The composition of the PVC composite material for the flame-retardant refrigerator backboard is shown in table 7:
table 7: unit (kg)
| PVC powder | Flame retardant | Plasticizer(s) | Filling material | Heat stabilizer | Lubricant | Antioxidant |
| 100 | 6 | 2 | 10 | 4 | 0.5 | 0.2 |
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 70%, volatile matter: 0.40%;
flame retardant: antimony trioxide, powder mesh number: 1250 mesh, purity: 98.0%;
and (3) a plasticizer: dioctyl terephthalate, ash: 0.05% and a density of 0.985g/cm 3 ；
Filling: magnesium hydroxide, mesh number: 1250 mesh, purity 95.0%;
heat stabilizer: barium zinc stabilizer, melting point: bulk density at 120 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 4000, melting point: 102.0 ℃;
an antioxidant: antioxidant 1010, 99% pure and 50 μm particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s2: then continuously adding the metered flame retardant, filler, heat stabilizer, lubricant and antioxidant into the high-speed stirrer according to the proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high speed stirring time was 5 minutes at a speed of 1300rpm.
S3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the PVC composite material for the flame-retardant refrigerator backboard. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 300rpm, and the vacuum degree is-0.80 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 165 c,
two zone temperature: 170 c,
three zone temperatures: 175 c,
four zone temperature: 180 c,
five zone temperature: 175 c,
temperature of the machine head: 170 ℃.
Comparative example 2
The composition of the PVC composite material for the flame-retardant refrigerator backboard is shown in table 8:
table 8: unit (kg)
| PVC powder | Flame retardant | Plasticizer(s) | Filling material | Heat stabilizer | Lubricant | Antioxidant |
| 100 | 6 | 2 | 10 | 4 | 0.5 | 0.2 |
Wherein:
PVC powder: number of viscosity: 107ml/g, apparent density: 0.42g/ml, whiteness: 70%, volatile matter: 0.40%;
flame retardant: antimony trioxide, powder mesh number: 1250 mesh, purity: 98.0%;
and (3) a plasticizer: dioctyl terephthalate, ash: 0.05% and a density of 0.985g/cm 3 ；
Filling: aluminum hydroxide, mesh number: 1250 mesh, purity 95.0%;
heat stabilizer: organotin stabilizers, melting point: bulk density at 89-91 ℃): 0.40g/cm 3 Heating and reducing: 2.0%;
and (3) a lubricant: polyethylene wax, viscosity average molecular weight: 4000, melting point: 102.0 ℃;
an antioxidant: antioxidant 1010, 99% pure and 50 μm particle size.
The preparation method of the polyvinyl chloride composite material for the low-cost high-flame-retardance refrigerator backboard comprises the following steps:
s1: firstly, placing the metered PVC powder into a high-speed stirrer, then adding the metered plasticizer, stirring to fully mix the materials, wherein: the high-speed stirring time is 5 minutes, and the rotating speed is 1300rpm;
s2: then continuously adding the metered flame retardant, filler, heat stabilizer, lubricant and antioxidant into the high-speed stirrer according to the proportion, stirring, and obtaining a mixed material after the materials are fully mixed, wherein: the high speed stirring time was 5 minutes at a speed of 1300rpm.
S3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the PVC composite material for the flame-retardant refrigerator backboard. Wherein: the temperature setting range of the twin-screw extruder is 165-185 ℃, the screw rotating speed is 300rpm, and the vacuum degree is-0.80 Kgf/cm 2 。
The temperature of each zone of the twin screw extruder was:
a zone temperature: 165 c,
two zone temperature: 170 c,
three zone temperatures: 175 c,
four zone temperature: 180 c,
five zone temperature: 175 c,
temperature of the machine head: 170 ℃.
The materials prepared in examples 1 to 6 and comparative examples 1 to 2 were subjected to the relevant performance tests according to the following criteria, and the results of the performance tests are shown in Table 9.
Tensile strength test standard: GB/T1040-1992;
notched impact strength test criteria: GB/T1843-1996;
flame retardancy standard: UL94 test standard.
TABLE 9 Performance test results
As can be seen from Table 93, the tensile strength, notch impact strength and other mechanical performance indexes of the PVC composite materials prepared in examples 1-6 of the application are obviously improved compared with those of comparative examples 1-2, and the impact toughness is good; and the flame retardant grade is higher than that of comparative examples 1-2, and can reach 5VA grade, meanwhile, due to the change of the components of the flame retardant, the preparation cost is obviously reduced (the market price of zinc borate is 1.2-1.5 ten thousand/ton, the market price of antimonous oxide is 6.0-6.5 ten thousand/ton, and the total preparation cost is reduced by 2500-2880 yuan per ton compared with the scheme in comparative example 1), and the flame retardant can be widely applied to the preparation of the refrigerator backboard. Therefore, the PVC composite material prepared by the preparation method has stronger market competitiveness, realizes high performance of the material, has good additional value, is low-carbon and environment-friendly, and can be widely applied to the preparation of refrigerator backboard.
In conclusion, the environment-friendly flame retardant, the plasticizer, the environment-friendly calcium-zinc stabilizer and the like are adopted, and the flame retardant level is improved by means of composite toughening and the like, so that the environment-friendly characteristic of the composite material is greatly improved, the production cost of the composite material is reduced, the requirements of the refrigerator backboard on high flame retardance and high environment friendliness can be well met, and further the environment-friendly flame retardant composite material can be widely applied.
It is to be understood that the foregoing detailed description of the application is merely illustrative of the application and is not limited to the embodiments of the application. It will be understood by those of ordinary skill in the art that the present application may be modified or substituted for elements thereof to achieve the same technical effects; as long as the use requirement is met, the application is within the protection scope of the application.
Claims (13)
1. The polyvinyl chloride composite material with low cost and high flame retardance is characterized by comprising the following components: 100 parts of PVC powder, 5-15 parts of chlorinated polyethylene, 3-10 parts of flame retardant, 1-5 parts of flame retardant synergist, 1-8 parts of environment-friendly plasticizer, 0.1-0.4 part of anti-dripping agent, 10-15 parts of filler, 2-5 parts of heat stabilizer, 0.1-1 part of lubricant and 0.1-1 part of antioxidant.
2. The low-cost high-flame-retardant polyvinyl chloride composite material according to claim 1, wherein the viscosity number of the PVC powder is 107-118 ml/g, the apparent density is 0.42-0.43 g/ml, the whiteness is 70-78%, and the volatile content is 0.40-0.50%.
3. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the chlorinated polyethylene has a tensile strength of 6 to 8MPa, an elongation at break of 700 to 900%, a volatile content of 0.05 to 0.1% and a chlorine content of 34.0 to 36.0%.
4. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the flame retardant is zinc borate, the powder mesh number is 1250-2500, and the purity is 98.0-99.0%.
5. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the flame-retardance synergist is a mixture of calcium silicate and magnesium silicate, and the mixing ratio of the calcium silicate to the magnesium silicate is 1:1-1:2.
6. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the environment-friendly plasticizer is environment-friendly epoxidized soybean oil, the environment-friendly epoxidized soybean oil has an epoxy value of 6.0 to 8.0%, ash content of 0.05 to 0.10% and density of 0.985 to 0.990g/cm 3 。
7. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the anti-dripping agent is polytetrafluoroethylene micropowder, the molecular weight of the polytetrafluoroethylene micropowder is 500-800 ten thousand, the mesh number is 200-500 meshes, and the purity is 98.0-99.0%.
8. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the heat stabilizer is a calcium-zinc stabilizer, and the melting point of the calcium-zinc stabilizer is 80-120 ℃; bulk density of 0.40-0.50 g/cm 3 The heating decrement is 2.0-3.0%.
9. The low-cost high-flame-retardant polyvinyl chloride composite material according to claim 1, wherein the filler is magnesium hydroxide or aluminum hydroxide, the mesh number of the magnesium hydroxide or the aluminum hydroxide is 1250-2500 meshes, and the purity is 95.0-98.0%.
10. The low cost, high flame retardant polyvinyl chloride composite material of claim 1 wherein the lubricant is a polyethylene wax having a viscosity average molecular weight of 4000 to 5000 and a melting point of 102.0 to 105.0 ℃.
11. The low-cost high-flame-retardance polyvinyl chloride composite material of claim 1, wherein the antioxidant is antioxidant 1010, the purity of the antioxidant 1010 is 97-99%, and the granularity is 50-100 microns.
12. A method for preparing the low-cost high-flame-retardance polyvinyl chloride composite material as claimed in any one of claims 1 to 12, comprising the following steps:
s1: firstly, placing the measured PVC powder into a high-speed stirrer, then adding the measured environment-friendly plasticizer, and stirring to fully mix the materials;
s2: then continuously adding the measured chlorinated polyethylene, the measured flame retardant synergist, the measured anti-dripping agent, the measured filler, the measured heat stabilizer, the measured lubricant and the measured antioxidant into the high-speed stirrer according to the proportion, stirring the materials, and obtaining a mixed material after the materials are fully mixed;
s3: adding the mixed material into a double-screw extruder, carrying out melt mixing plasticization, shearing, mixing and final melt extrusion on the mixed material, and cooling, air-drying, granulating and drying the extruded material to obtain the low-cost high-flame-retardance polyvinyl chloride composite material.
13. A refrigerator back panel characterized by being made of the low-cost high-flame-retardance polyvinyl chloride composite material according to any one of claims 1 to 11.
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| CN117362865A (en) * | 2023-09-26 | 2024-01-09 | 江苏华信高新材料有限公司 | High-dimensional card and low-strength PVC board and preparation method thereof |
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