News Details
Flame retardant PVC insulated wire and cable
2017-11-13 10:48:23
Flame retardant PVC insulated wire and cable
The oxygen index of flame retardant cable materials with higher flame retardant performance better, but with the increase of oxygen index, will lose part of other properties. Such as physical properties and processing properties of materials decreased, difficult operation, and the material cost increase, so we should choose reasonable and appropriate oxygen index.
The general insulation material of oxygen index reached 30, while the product can be through the test standard in class C requirements, if the sheath material, filling material using flame retardant materials, the product can reach the requirements of class B and class A. Flame retardant PVC insulated wire and cable consists of halogen containing flame retardant PVC insulated wire and cable and halogen-free flame retardant PVC insulated wire and cable.
Because the combustion heat exothermic decomposition of hydrogen halide, hydrogen halide can capture HO radical root, so that the material combustion delay or extinguished, as to retard the. The commonly used halogen containing flame retardant material material PVC, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene rubber etc..
Flame retardant PVC: PVC (PVC) because of cheap price, good insulation performance, flame retardant, is widely used in flame retardant wire and cable. In order to improve the flame retardancy of PVC, often add halogen flame retardant in the formula (ten BDE), chlorinated paraffin and synergistic flame retardant to improve the flame retardant pvc.
Ethylene propylene rubber (EPDM): non-polar hydrocarbons, has excellent electrical performance, high insulation resistance, small dielectric loss, but ethylene propylene rubber is a flammable material, must reduce the degree of crosslinking of ethylene propylene rubber, low molecular weight substances to reduce the molecular chain is broken and produced, in order to improve the flame retardant properties of materials. With the increase of degree of crosslinking of ethylene propylene rubber, the oxygen index increased.
For example, to accede to the glue in the formula of DC (P two cumene peroxide), crosslinking agent TAIC (three allyl isocyanurate), HVA (2N, N - phenylene bis imide) can cause the oxygen index increased by 10~15. Another method, adding inorganic flame retardant filler in ethylene propylene rubber can also make the oxygen index increase.
Triphenyl Phosphate (TPP)
Retardants tpp quality standards:
Appearance: white flaky crystal
Content : ≥ 99%;
Acid value (mgKOH / g): ≤ 0.1;
Free phenol : ≤ 0.1%;
Freezing point : ≥ 47.0 ℃
Chromaticity (APHA): ≤ 60;
Moisture : ≤ 0.1%
Density (50 ℃, g/cm3) :1.185-1 .202
Retardants tpp Packing: NW 25KG / composite paper ( lined with black plastic bags ) , a small cabinet loaded 12.5 tons .
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
The commonly used filler of A (lOH) 3, they can release the water of crystallization under high temperature, heat and flame retardant effect to absorb a large number of. But added a large number of filler materials will make the mechanical and electrical properties (such as decreased tensile strength and elongation). The filler can not exceed 150. In order to obtain good flame retardancy and keep high mechanical property, flame retardant filler must be appropriate to reduce the increase of other flame retardants.
Low smoke and low halogen flame retardant materials mainly for PVC and chlorosulfonated polyethylene of two kinds of materials. Adding CaCO3 and A in the formula of polyvinyl chloride (lOH) 3. Zinc borate and MoO3 flame retardant PVC can reduce the release amount of HCL and the amount of smoke, so as to improve the flame retardant materials, reduce emissions of halogen, acid mist and smoke, but may make the oxygen index decreased slightly. When the additive amount is larger, also can make the material mechanical properties and electrical properties declined.
Polyolefin is halogen-free materials, composed of hydrocarbons, decomposition in the combustion of carbon dioxide and water, no obvious smoke and harmful gas. Polyolefin including polyethylene (PE), ethylene vinyl acetate vinyl polymer (E-VA). The material itself does not need to add is flame retardant, inorganic flame retardant and phosphorus series flame retardant, can be processed into halogen-free flame retardant materials, but practical, because the molecular chains of nonpolar substances on the lack of polar groups with hydrophobicity, and the inorganic flame retardant affinity is poor performance, it is difficult to bond.
In order to improve the surface activity of polyolefin, adding surfactant in the formula; or in polyolefin mixed with polymers containing polar groups were studied, so as to improve the flame retardant filler dosage, improve the material mechanical performance and processing performance, and obtain good flame resistance.
With the rapid development of synthetic resin industry in China, and the national norms on flame retardant material application law, application of ammonium polyphosphate and demand will increase. Ammonium polyphosphate as an important inorganic flame retardant, in the next few years will be further developed, cheap and efficient development of ammonium polyphosphate based expansion type flame retardant synergistic agent, can effectively reduce the amount of ammonium polyphosphate in the matrix, reduce costs, and reduce the adverse effects of ammonium polyphosphate substrate the performance, to further expand the application field of ammonium polyphosphate.
Although the change of ammonium polyphosphate synergist application and mechanism research can not fundamentally poor compatibility and the hygroscopicity of ammonium polyphosphate and resin, but can provide powerful guidance for surface modification of ammonium polyphosphate and micro capsule, especially in the preparation of low water soluble ammonium polyphosphate at the same time, if we can consider from the synergy angle, taking into account the ammonium polyphosphate flame retardant will improve, mainly for developing a new ammonium polyphosphate intumescent flame retardant is favorable.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The oxygen index of flame retardant cable materials with higher flame retardant performance better, but with the increase of oxygen index, will lose part of other properties. Such as physical properties and processing properties of materials decreased, difficult operation, and the material cost increase, so we should choose reasonable and appropriate oxygen index.
The general insulation material of oxygen index reached 30, while the product can be through the test standard in class C requirements, if the sheath material, filling material using flame retardant materials, the product can reach the requirements of class B and class A. Flame retardant PVC insulated wire and cable consists of halogen containing flame retardant PVC insulated wire and cable and halogen-free flame retardant PVC insulated wire and cable.
Because the combustion heat exothermic decomposition of hydrogen halide, hydrogen halide can capture HO radical root, so that the material combustion delay or extinguished, as to retard the. The commonly used halogen containing flame retardant material material PVC, chloroprene rubber, chlorosulfonated polyethylene, ethylene propylene rubber etc..
Flame retardant PVC: PVC (PVC) because of cheap price, good insulation performance, flame retardant, is widely used in flame retardant wire and cable. In order to improve the flame retardancy of PVC, often add halogen flame retardant in the formula (ten BDE), chlorinated paraffin and synergistic flame retardant to improve the flame retardant pvc.
Ethylene propylene rubber (EPDM): non-polar hydrocarbons, has excellent electrical performance, high insulation resistance, small dielectric loss, but ethylene propylene rubber is a flammable material, must reduce the degree of crosslinking of ethylene propylene rubber, low molecular weight substances to reduce the molecular chain is broken and produced, in order to improve the flame retardant properties of materials. With the increase of degree of crosslinking of ethylene propylene rubber, the oxygen index increased.
For example, to accede to the glue in the formula of DC (P two cumene peroxide), crosslinking agent TAIC (three allyl isocyanurate), HVA (2N, N - phenylene bis imide) can cause the oxygen index increased by 10~15. Another method, adding inorganic flame retardant filler in ethylene propylene rubber can also make the oxygen index increase.
Triphenyl Phosphate (TPP)
Retardants tpp quality standards:
Appearance: white flaky crystal
Content : ≥ 99%;
Acid value (mgKOH / g): ≤ 0.1;
Free phenol : ≤ 0.1%;
Freezing point : ≥ 47.0 ℃
Chromaticity (APHA): ≤ 60;
Moisture : ≤ 0.1%
Density (50 ℃, g/cm3) :1.185-1 .202
Retardants tpp Packing: NW 25KG / composite paper ( lined with black plastic bags ) , a small cabinet loaded 12.5 tons .
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
The commonly used filler of A (lOH) 3, they can release the water of crystallization under high temperature, heat and flame retardant effect to absorb a large number of. But added a large number of filler materials will make the mechanical and electrical properties (such as decreased tensile strength and elongation). The filler can not exceed 150. In order to obtain good flame retardancy and keep high mechanical property, flame retardant filler must be appropriate to reduce the increase of other flame retardants.
Low smoke and low halogen flame retardant materials mainly for PVC and chlorosulfonated polyethylene of two kinds of materials. Adding CaCO3 and A in the formula of polyvinyl chloride (lOH) 3. Zinc borate and MoO3 flame retardant PVC can reduce the release amount of HCL and the amount of smoke, so as to improve the flame retardant materials, reduce emissions of halogen, acid mist and smoke, but may make the oxygen index decreased slightly. When the additive amount is larger, also can make the material mechanical properties and electrical properties declined.
Polyolefin is halogen-free materials, composed of hydrocarbons, decomposition in the combustion of carbon dioxide and water, no obvious smoke and harmful gas. Polyolefin including polyethylene (PE), ethylene vinyl acetate vinyl polymer (E-VA). The material itself does not need to add is flame retardant, inorganic flame retardant and phosphorus series flame retardant, can be processed into halogen-free flame retardant materials, but practical, because the molecular chains of nonpolar substances on the lack of polar groups with hydrophobicity, and the inorganic flame retardant affinity is poor performance, it is difficult to bond.
In order to improve the surface activity of polyolefin, adding surfactant in the formula; or in polyolefin mixed with polymers containing polar groups were studied, so as to improve the flame retardant filler dosage, improve the material mechanical performance and processing performance, and obtain good flame resistance.
With the rapid development of synthetic resin industry in China, and the national norms on flame retardant material application law, application of ammonium polyphosphate and demand will increase. Ammonium polyphosphate as an important inorganic flame retardant, in the next few years will be further developed, cheap and efficient development of ammonium polyphosphate based expansion type flame retardant synergistic agent, can effectively reduce the amount of ammonium polyphosphate in the matrix, reduce costs, and reduce the adverse effects of ammonium polyphosphate substrate the performance, to further expand the application field of ammonium polyphosphate.
Although the change of ammonium polyphosphate synergist application and mechanism research can not fundamentally poor compatibility and the hygroscopicity of ammonium polyphosphate and resin, but can provide powerful guidance for surface modification of ammonium polyphosphate and micro capsule, especially in the preparation of low water soluble ammonium polyphosphate at the same time, if we can consider from the synergy angle, taking into account the ammonium polyphosphate flame retardant will improve, mainly for developing a new ammonium polyphosphate intumescent flame retardant is favorable.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian