News Details
Flame retardant for cable
2017-9-12 15:31:20
Flame retardant for cable
The higher the oxygen index of the material used in flame retardant cable, the better the flame retardant performance, but with the improvement of oxygen index, it is necessary to lose some other properties. Such as the material physical properties and process performance, operating difficulties, make the material cost increase again at the same time, so be reasonable to choose appropriate oxygen index and general insulation oxygen index reached 30, the products required by standard C in the test, if the sheath material, filling material with flame retardant materials, the product can meet the requirements of class B and class A. The flame retardant for cable is mainly divided into the flame retardant of the halogen cable and the flame retardant of the non-halogen cable.
Because the halogenated hydrogen is decomposed during the heat of combustion, the halogenated hydrogen can capture the active free radical HO root, thereby delaying or extinguishing the combustion of the material, and the flame retardant is achieved. The commonly used halogen flame retardant materials are polyvinyl chloride, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene rubber and other materials.
Flame retardant polyvinyl chloride (PVC) : due to the low price of PVC, good insulation performance and good flame retardancy, it is widely used in ordinary flame retardant wire and cable. In order to improve the flame retardancy of PVC, the flame retardancy of polyvinyl chloride is enhanced by adding halogen flame retardants (decabromodiphenyl ether), chlorinated paraffin and synergistic flame retardants.
Ethylene propylene rubber (EPDM) : is polar hydrocarbons, with excellent electrical properties, high insulation resistance, dielectric loss is small, but ethylene propylene rubber is flammable material, must reduce ethylene propylene rubber crosslinking degree, reduce the molecular chain disconnect and the low molecular weight material, to improve the flame retardant performance of materials. The oxygen index increases with the increase of the crosslinking degree of ethylene propylene rubber.
Such as formulated in glue DC (P dicumyl peroxide), crosslinking agent TAIC (3 propenyl cyanide urea acid ester), HVA - (2 N, N - phenylene double horse imide) can make the oxygen index increased by 10 to 15. In addition, the addition of inorganic flame retardant fillers in ethylene propylene rubber can also increase the oxygen index.
Tris (2-Chloroethyl) Phosphate use
1. Tris (2-Chloroethyl) Phosphate Has Excellent Flame Retardancy, Excellent Resistance To Low Temperature And UV Resistance, The Steam Can Only Be Used At 225 ℃ Above The Direct Ignition Can Be Fired, But The Fire The Source Is Immediately Self-Extinguishing. This Product Is A Flame Retardant Not Only Can Improve The Material Level Of Flame Retardant Materials, But Also Improve The Flame Resistance Of Water Resistance, Acid Resistance, Cold Resistance And Antistatic Properties. Commonly Used In Flame Retardant Nitrocellulose And Acetate Fiber As The Substrate Of Paint Coatings, Unsaturated Polyester, Polyurethane, Acrylic, Phenolic Resin, Can Also Be Used For Soft PVC Plastic Flame Retardant. This Product Is Used For The Amount Of Unsaturated Polyester 10% To 20%, In The Polyurethane Rigid Foam (Flame Retardant Polyether As Raw Material) Can Be About 10% In The Soft PVC Used As Auxiliary Plastic Flame Retardant When The 5% To 10%. Flame Retardants, Uranium, Thorium, Plutonium, Technetium And Other Rare Metal Separation Solvent Or Extractant.
2. This Product Is Widely Used In Chemical Fiber Fabrics, Cellulose Acetate As A Flame Retardant, In Addition To Self-Extinguishing, But Also Improve Water Resistance, Cold Resistance And Antistatic Properties. The General Amount Of 5 To 10 Copies. This Product Is An Excellent Flame Retardant For Synthetic Materials, And Has A Good Role In The Promotion, Widely Used In Cellulose Acetate, Nitrocellulose Varnish, Ethyl Cellulose, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane, Phenolic Resin , In Addition To Self-Extinguishing Products, But Also Improve The Physical Properties Of Products, Products Feel Soft, Also Known As Oil Additives And Rare Elements Of The Extractant, And Flame Retardant Rubber Conveyor Belt Is The Main Flame Retardant Materials , The General Amount Of Added 5% To 10%.
3. Used As Additive Type Halogenated Phosphate Flame Retardant And Plasticizer. Molecules In Both Phosphorus And Chlorine, Flame Retardant Effect Is Remarkable, Not Volatile And Hydrolysis, Good Stability To Ultraviolet Light. Applicable To Phenolic Resin, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane And So On. Also Used As Nitrocellulose Coating Flame Retardant, PVC Flame Retardant Plasticizer, Metal Extractant, Gasoline Additives And Polyimide Processing Aids And So On. Can Improve Water Resistance, Weatherability, Cold Resistance, Antistatic Property. Reference Dosage 5% To 20%.
The commonly used fillers are A (lOH) 3, which can release the crystal water at high temperature and absorb heat to achieve the flame retardant effect. But a large number of fillers will reduce the mechanical properties and electrical properties of the material (such as tensile strength and elongation). So you can't get more than 150 fillers. In order to obtain good flame retardant performance and maintain high mechanical properties, it is necessary to properly reduce the flame retardant and add other flame retardants.
Low-smoke low-halogen flame retardant materials are mainly used for polyvinyl chloride and chlorosulfonated polyethylene. CaCO3 and A (lOH) 3 are added to the polyvinyl chloride formula. Zinc borate and MoO3 can reduce the flame retardant PVC HCL to release a quantity and the amount of smoke, thus improve the flame retardant materials, reduce the number of halogen, acid mist and smoke emissions, but it may make the oxygen index fell slightly. When the dosage of additives is larger, the mechanical properties and electrical properties of the materials will decrease.
Polyolefins are halogen-free materials composed of hydrocarbons that break down carbon dioxide and water when burned without producing significant smoke and harmful gases. Polyolefin mainly includes polyethylene (PE), ethylene - acetate (e-va). The material itself does not have flame retardancy, need to add the inorganic flame retardants and phosphorus flame retardant series, can be processed into useful halogen-free flame retardant materials, however, because of nonpolar substances molecular chain lack of polar group is hydrophobic, and affinity of inorganic flame retardant performance is poorer, difficult to solid combination.
In order to improve the surface activity of polyolefins, surfactant can be added to the formula. Or in polyolefin mixed with containing polar groups of the polymer blend, thus improve the dosage of the flame retardant filler, improving mechanical properties of materials and processing performance, at the same time achieve good flame retardancy.
With the rapid development of synthetic resin industry in China and the standardization and legalization of the application of flame retardant materials, the application and demand of ammonium polyphosphate will be increased. Ammonium polyphosphate as an important inorganic flame retardants, in the next few years will get further development, the development of cheap and efficient of ammonium polyphosphate expansion type flame retardant agent association effect, can effectively reduce the amount of ammonium polyphosphate in the matrix, reduce costs, and reduce the negative impact of ammonium polyphosphate on properties of the matrix to further expand the application field of ammonium polyphosphate.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
The higher the oxygen index of the material used in flame retardant cable, the better the flame retardant performance, but with the improvement of oxygen index, it is necessary to lose some other properties. Such as the material physical properties and process performance, operating difficulties, make the material cost increase again at the same time, so be reasonable to choose appropriate oxygen index and general insulation oxygen index reached 30, the products required by standard C in the test, if the sheath material, filling material with flame retardant materials, the product can meet the requirements of class B and class A. The flame retardant for cable is mainly divided into the flame retardant of the halogen cable and the flame retardant of the non-halogen cable.
Because the halogenated hydrogen is decomposed during the heat of combustion, the halogenated hydrogen can capture the active free radical HO root, thereby delaying or extinguishing the combustion of the material, and the flame retardant is achieved. The commonly used halogen flame retardant materials are polyvinyl chloride, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene rubber and other materials.
Flame retardant polyvinyl chloride (PVC) : due to the low price of PVC, good insulation performance and good flame retardancy, it is widely used in ordinary flame retardant wire and cable. In order to improve the flame retardancy of PVC, the flame retardancy of polyvinyl chloride is enhanced by adding halogen flame retardants (decabromodiphenyl ether), chlorinated paraffin and synergistic flame retardants.
Ethylene propylene rubber (EPDM) : is polar hydrocarbons, with excellent electrical properties, high insulation resistance, dielectric loss is small, but ethylene propylene rubber is flammable material, must reduce ethylene propylene rubber crosslinking degree, reduce the molecular chain disconnect and the low molecular weight material, to improve the flame retardant performance of materials. The oxygen index increases with the increase of the crosslinking degree of ethylene propylene rubber.
Such as formulated in glue DC (P dicumyl peroxide), crosslinking agent TAIC (3 propenyl cyanide urea acid ester), HVA - (2 N, N - phenylene double horse imide) can make the oxygen index increased by 10 to 15. In addition, the addition of inorganic flame retardant fillers in ethylene propylene rubber can also increase the oxygen index.
Tris (2-Chloroethyl) Phosphate use
1. Tris (2-Chloroethyl) Phosphate Has Excellent Flame Retardancy, Excellent Resistance To Low Temperature And UV Resistance, The Steam Can Only Be Used At 225 ℃ Above The Direct Ignition Can Be Fired, But The Fire The Source Is Immediately Self-Extinguishing. This Product Is A Flame Retardant Not Only Can Improve The Material Level Of Flame Retardant Materials, But Also Improve The Flame Resistance Of Water Resistance, Acid Resistance, Cold Resistance And Antistatic Properties. Commonly Used In Flame Retardant Nitrocellulose And Acetate Fiber As The Substrate Of Paint Coatings, Unsaturated Polyester, Polyurethane, Acrylic, Phenolic Resin, Can Also Be Used For Soft PVC Plastic Flame Retardant. This Product Is Used For The Amount Of Unsaturated Polyester 10% To 20%, In The Polyurethane Rigid Foam (Flame Retardant Polyether As Raw Material) Can Be About 10% In The Soft PVC Used As Auxiliary Plastic Flame Retardant When The 5% To 10%. Flame Retardants, Uranium, Thorium, Plutonium, Technetium And Other Rare Metal Separation Solvent Or Extractant.
2. This Product Is Widely Used In Chemical Fiber Fabrics, Cellulose Acetate As A Flame Retardant, In Addition To Self-Extinguishing, But Also Improve Water Resistance, Cold Resistance And Antistatic Properties. The General Amount Of 5 To 10 Copies. This Product Is An Excellent Flame Retardant For Synthetic Materials, And Has A Good Role In The Promotion, Widely Used In Cellulose Acetate, Nitrocellulose Varnish, Ethyl Cellulose, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane, Phenolic Resin , In Addition To Self-Extinguishing Products, But Also Improve The Physical Properties Of Products, Products Feel Soft, Also Known As Oil Additives And Rare Elements Of The Extractant, And Flame Retardant Rubber Conveyor Belt Is The Main Flame Retardant Materials , The General Amount Of Added 5% To 10%.
3. Used As Additive Type Halogenated Phosphate Flame Retardant And Plasticizer. Molecules In Both Phosphorus And Chlorine, Flame Retardant Effect Is Remarkable, Not Volatile And Hydrolysis, Good Stability To Ultraviolet Light. Applicable To Phenolic Resin, Polyvinyl Chloride, Polyvinyl Acetate, Polyurethane And So On. Also Used As Nitrocellulose Coating Flame Retardant, PVC Flame Retardant Plasticizer, Metal Extractant, Gasoline Additives And Polyimide Processing Aids And So On. Can Improve Water Resistance, Weatherability, Cold Resistance, Antistatic Property. Reference Dosage 5% To 20%.
The commonly used fillers are A (lOH) 3, which can release the crystal water at high temperature and absorb heat to achieve the flame retardant effect. But a large number of fillers will reduce the mechanical properties and electrical properties of the material (such as tensile strength and elongation). So you can't get more than 150 fillers. In order to obtain good flame retardant performance and maintain high mechanical properties, it is necessary to properly reduce the flame retardant and add other flame retardants.
Low-smoke low-halogen flame retardant materials are mainly used for polyvinyl chloride and chlorosulfonated polyethylene. CaCO3 and A (lOH) 3 are added to the polyvinyl chloride formula. Zinc borate and MoO3 can reduce the flame retardant PVC HCL to release a quantity and the amount of smoke, thus improve the flame retardant materials, reduce the number of halogen, acid mist and smoke emissions, but it may make the oxygen index fell slightly. When the dosage of additives is larger, the mechanical properties and electrical properties of the materials will decrease.
Polyolefins are halogen-free materials composed of hydrocarbons that break down carbon dioxide and water when burned without producing significant smoke and harmful gases. Polyolefin mainly includes polyethylene (PE), ethylene - acetate (e-va). The material itself does not have flame retardancy, need to add the inorganic flame retardants and phosphorus flame retardant series, can be processed into useful halogen-free flame retardant materials, however, because of nonpolar substances molecular chain lack of polar group is hydrophobic, and affinity of inorganic flame retardant performance is poorer, difficult to solid combination.
In order to improve the surface activity of polyolefins, surfactant can be added to the formula. Or in polyolefin mixed with containing polar groups of the polymer blend, thus improve the dosage of the flame retardant filler, improving mechanical properties of materials and processing performance, at the same time achieve good flame retardancy.
With the rapid development of synthetic resin industry in China and the standardization and legalization of the application of flame retardant materials, the application and demand of ammonium polyphosphate will be increased. Ammonium polyphosphate as an important inorganic flame retardants, in the next few years will get further development, the development of cheap and efficient of ammonium polyphosphate expansion type flame retardant agent association effect, can effectively reduce the amount of ammonium polyphosphate in the matrix, reduce costs, and reduce the negative impact of ammonium polyphosphate on properties of the matrix to further expand the application field of ammonium polyphosphate.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian