Flame Retardant Additives for Polyethylene
| HS Code | 187127 |
| Flammability | Reduces flammability of polyethylene |
| Thermal Stability | Enhances thermal stability |
| Mechanical Properties | May slightly impact mechanical properties like tensile strength |
| Processing Temperature | Can influence optimal processing temperature |
| Color Compatibility | Should be compatible with desired polyethylene color |
| Additive Loading | Requires appropriate loading level for effectiveness |
| Environmental Impact | Should have low environmental impact |
| Smoke Suppression | May suppress smoke during combustion |
| Long Term Durability | Maintains flame - retardant performance over time |
As an accredited Flame Retardant Additives for Polyethylene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Polyethylene flame - retardant additives: Packed in 25 - kg bags for easy handling. |
| Storage | Flame Retardant Additives for Polyethylene should be stored in a cool, dry place away from direct sunlight and heat sources. Keep them in tightly - sealed containers to prevent moisture absorption and contamination. Store separately from reactive chemicals. Ensure proper ventilation in the storage area to avoid the buildup of harmful vapors. |
| Shipping | Flame Retardant Additives for Polyethylene are shipped in well - sealed containers to prevent exposure. Shipment follows strict chemical transport regulations, ensuring safety during transit, safeguarding both the product and the environment. |
Competitive Flame Retardant Additives for Polyethylene prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
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Historical Development
Polyethylene, since the end of the 19th century, has gradually become a practical material due to its excellent properties. However, it is flammable, and it will burn in case of fire. Those who need to be prevented are increasingly urgent. The first use of halogen flame retardants began in the 20th century, and bromine and chlorine compounds were gradually adopted and became popular in industry. However, it caused disasters to the environment and became increasingly toxic. By the end of the 20th century, the concept of environmental protection increased day by day, and new flame retardants such as phosphorus and nitrogen came out one after another, gradually replacing old halogen products. Nano flame retardants have revived, with both high efficiency and green use, enhancing the flame retardancy of polyethylene. Various synergistic agents also cooperate to improve the overall performance. Today, polyethylene flame retardants are becoming more and more new in technology, taking into account safety and environmental protection, which is a great concept of evolution over
Product Overview
This product is a special flame retardant additive for polyethylene. It has refined the principles of chemistry and selected high-efficiency ingredients. It is widely used in plastic products with its superior properties. Its properties are mild without damaging the body. After incorporating polyethylene, it can greatly improve its fire resistance and flame retardant power. It is not easy to support combustion in case of flames, and the smoke is scarce. It delays the spread of combustion and effectively guarantees safety. This agent has good dispersibility and can be evenly mixed in raw materials without affecting physical properties, maintaining the flexibility and firmness of the material. It has strong compatibility and is suitable for various processing technologies. It has no odor and is rare to generate harmful by-products. If used in this way, it can be widely used in cables, films, pipes and various civilian industrial products, which not only protects the use of products, but also increases the safety force.
Physical & Chemical Properties
Polyethylene fire retardant additive, solid and dense, like white fine powder, slightly hygroscopic, light weight. Its high melting temperature, easy to disperse in the polyethylene matrix, not easy to precipitate. The chemical stability, fire-resistant, good compatibility with polyethylene, evenly dispersed in the material. The additive in case of high temperature will slowly release flame retardant components, can neutralize free radicals, weaken the combustion chain reaction. Soluble in strong polar solvents, insoluble in water and general organic solutions, alkali and acid-resistant, long-term storage does not change its properties. Its thermal stability is good, volatile, if matched with different systems, can adjust its flame retardant effect. Odorless at room temperature, non-toxic, environmentally friendly and safe. Where polyethylene is applied, it can significantly increase the fire resistance level of the material, slow down the spread of fire, and ensure practical safety.
Technical Specifications & Labeling
This product is specially used in polyethylene and is called a flame retardant aid. Its properties are white fine powder, uniform particle size, dry and easy to disperse, and no peculiar smell. It is chemically stable and not easy to volatilize. The content of the main ingredients is no less than 98%, and the moisture is less than 1%. The melting point is higher than 250 degrees Celsius, and the thermal degradation temperature is about 300 degrees. It should be stored in a cool place. It has the advantages of low toxicity, no corrosion, and no precipitation. It is suitable for the processing of various types of polyethylene products such as films, pipes, and plates. The dosage generally depends on the substrate and the required flame retardant grade, ranging from one to five points. Good compatibility, can be used with a variety of additives. The packaging specification is a 25 kg bag, with external laminated plastic weaving, and the marking batch is clear to facilitate traceability.
Preparation Method
High-density polyethylene is selected as the base, with bromine and phosphorus-based flame retardants as raw materials, supplemented by additives such as magnesium hydroxide and antimony trioxide, and mixed uniformly. At the beginning of the melt blending method, the polyethylene is first melted at high temperature, followed by slow injection of flame retardant, stirring to disperse it in the matrix. Then extrusion granulation is used, constant temperature and pressure are applied, and the polyethylene is further fused with the flame retardant component, and the granulation is cooled and formed. If the phosphorus-based flame retardant needs to be catalyzed by adding acid, the polyphosphate is formed through a condensation reaction, and then dispersed in the polyethylene by mechanical force. The reaction mechanism is that the catalyst activates the surface, promotes the formation of phosphorus-oxygen bonds between internal molecules, improves flame retardancy, and gives the effect of forming a The whole process is orderly, which not only guarantees the performance of polyethylene, but also requires flame retardant safety.
Chemical Reactions & Modifications
Polyethylene is lazy and difficult to self-retardant. It is chemically modified to increase its fire resistance. Commonly used flame retardants such as phosphorus, nitrogen, bromine, or aluminum oxide and magnesium hydroxide are added to the polyethylene matrix. When it enters fire and is heated, it releases phosphoric acid, which can form a carbon layer, isolate oxygen, and inhibit combustion. Magnesium hydroxide and aluminum oxide also decompose thermally, absorb heat and release water, and cool down the polyester flame. Bromide is trapped by free radicals and cuts off the combustion chain. Additives or surface treatment to achieve uniform dispersion without compromising the properties of the matrix. Complex synergy effect, compound application, is conducive to flame retardancy and maintenance of function. These chemical modifications are the key to fire protection of polyethylene materials.
Synonyms & Product Names
Polyethylene flame retardants, also known as fire retardants, flame-resistant additives, flame-resistant agents, etc., are a genus of chemical additives. On the market, there are many names, including Aflammit PE, Exolit OP, Flamestab, Antiblaze and even full names such as Flame Retardant Masterbatch for PE, Polyethylene Fire Retardant Additive, etc., all of which are one kind of thing. Suppressing its kind, or PE flame retardant masterbatch, PE fire retardant additives, are suitable for the fire safety of polyethylene products. However, each factory may use its own trade name depending on the formula, function and performance. In a nutshell, synonymous refers to the use of adding flame resistance to polyethylene, and the trade names are the respective names of merchants. Although the names are different, they are actually the same. Circulated at home and abroad, it is widely used to help polyethylene products avoid fire and ensure the safety of users.
Safety & Operational Standards
Polyethylene plus flame retardant is an essential product for fire prevention. When applying it to the process, it is advisable to be cautious in safety and operation. When handling this object, be sure to place it in a well-ventilated room, and do not keep it close to open flames and hot topics. Keep fire away and prevent spontaneous combustion. Operators must wear protective clothing, gloves, and goggles to avoid skin and mucous membranes. If you accidentally touch the skin, rinse it with water as soon as possible, and seek medical attention in severe cases. Its odor may be slightly irritating. If you inhale too much, you should quickly move it away from the place and inhale fresh air.
Every time you open the container, be sure to slowly, do not let the powder spread. Do not use hand contact, use special equipment to take it lightly, and weigh it correctly, not too much. Emergency equipment should be kept at the operating site, and fire extinguishers should be placed nearby to prevent accidents. It is strictly forbidden to store and transport acids, alkalis and flammable substances together to prevent their reaction and deterioration. After the container is opened, it should be tightly sealed and properly stored. It is strictly forbidden to leave behind or leak out. All residues must be properly disposed of according to specifications, and cannot be dumped at will to prevent environmental harm.
During transportation, it should be firmly fixed to prevent shock and dumping, and avoid sunshine and rain. At the end of the operation, tools and utensils must be cleaned to prevent the accumulation of residues, so as to avoid long-term accumulation and disease. If there is an accident, such as leaking a fire alarm, it should be dealt with according to the emergency plan, quickly evacuate unrelated people, etc., and notify the relevant departments to assist in rescue. It is not allowed to dispose of it without authorization. Once professionals Usually, training should be carried out regularly, so that operators are aware of the safety and avoid the disadvantages of negligence.
If this standard is not slack, the chemical troubles can be controlled and the benefits of the industry can be long.
Every time you open the container, be sure to slowly, do not let the powder spread. Do not use hand contact, use special equipment to take it lightly, and weigh it correctly, not too much. Emergency equipment should be kept at the operating site, and fire extinguishers should be placed nearby to prevent accidents. It is strictly forbidden to store and transport acids, alkalis and flammable substances together to prevent their reaction and deterioration. After the container is opened, it should be tightly sealed and properly stored. It is strictly forbidden to leave behind or leak out. All residues must be properly disposed of according to specifications, and cannot be dumped at will to prevent environmental harm.
During transportation, it should be firmly fixed to prevent shock and dumping, and avoid sunshine and rain. At the end of the operation, tools and utensils must be cleaned to prevent the accumulation of residues, so as to avoid long-term accumulation and disease. If there is an accident, such as leaking a fire alarm, it should be dealt with according to the emergency plan, quickly evacuate unrelated people, etc., and notify the relevant departments to assist in rescue. It is not allowed to dispose of it without authorization. Once professionals Usually, training should be carried out regularly, so that operators are aware of the safety and avoid the disadvantages of negligence.
If this standard is not slack, the chemical troubles can be controlled and the benefits of the industry can be long.
Application Area
Polyethylene is widely used in the world and is widely used in factories. However, it is flammable and cannot be ignored. Nowadays, flame retardant additives are used to enhance its fire resistance. They are widely used in various fields and are actually important security devices. For example, wires and cables are relied on for flame retardant to prevent the spread of fire and ensure the safety of communication and power supply. For example, in the construction industry, thermal insulation materials and various types of plastic sheets, flame retardant additives are applied, which can not only enhance the safety of the structure, but also delay the fire and reduce the loss of property and life. In automobile manufacturing, interiors and wiring harnesses are taken in large quantities to prevent accidents, so that the transportation can be carried out without fear of being burned. Packaging containers and home appliance shells also benefit. Flame retardant additives are widely used in many fields of industry and civil use, protecting the safety of the national economy and people's livelihood, and ensuring harmony and development.
Research & Development
Polyethylene is a commonly used polymer material in the world. It has excellent properties, but its flammable disadvantages need to be overcome urgently. So people with lofty ideals dedicated themselves to studying the method of flame retardant additives. At first, halogen-based compounds were introduced, which had good flame retardant effect, but their smog toxicity and environmental pollution gradually attracted criticism from the academic community. Later, halogen-free flame retardant additives were developed, and phosphorus-based, nitrogen-based and inorganic fillers were tried to be both safe and efficient. In the meantime, there are applications of nano-materials, which can be added in small amounts to significantly improve the flame retardant effect. Today's products not only retain the original physical properties of polyethylene, but also have excellent flame retardant effect, which is safe and environmentally friendly, and is widely used. However, innovation continues, and the process and formula still need to be refined, striving for the ultimate in performance, cost and compatibility, so as to contribute to the sustainable development of society.
Toxicity Research
Flame retardants added to polyethylene can increase the fire resistance of the material, but its toxicity cannot be ignored. Looking at all kinds of flame retardants, such as bromine, phosphorus and inorganic, bromine is particularly commonly used, but it is easy to release bromide when incinerated, which is harmful to the environment and human body. Its smoke contains toxic particles such as dioxins and furans, which can cause respiratory diseases, inhibit liver and kidney function, and even cause cancer. Although phosphorus compounds are slightly inferior, they can also cause chronic poisoning when accumulated; when moved to the environment, they can have ecological disturbances. Inorganic flame retardants such as aluminum hydroxide, magnesium, etc., are less toxic, but the large amount may affect the mechanical properties. All of these should be carefully debated for their toxicity in production and application, taking into account fire prevention and health and safety. They should not focus on the advantages and ignore the disadvantages.
Future Prospects
Polyethylene flame retardant additives are popular in the world today, but their development is not endless. Looking at the rise of the current environmental protection wave, human beings are increasingly green and low-carbon, and additives will also tend to be non-toxic and degradable, and their efficacy will benefit the environment. With the increasing technology, nanomaterials or bio-based components will be integrated into the flame retardant system, doubling its flame retardant performance without reducing its mechanical beauty. In the future, the formula must be exquisite, which not only preserves the essential advantages of polyethylene, but also endows it with high efficiency and self-extinguishing, and new flame retardant technologies will emerge as the times require. Material modification, or from extensive to intelligent, responds to environmental changes, and self-adjusts the flame retardant effect. Industry-university-research collaboration, innovation is endless, and the goal is to achieve the best, and the times progress. It is necessary to see stronger flame retard
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As a leading Flame Retardant Additives for Polyethylene supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
What are the Main Types of Flame Retardant Additives for Polyethylene?
Polyethylene is soft in nature and is widely used in many utensils. However, its nature is flammable, and it is difficult to burn the flame in case of fire. Therefore, people mostly apply flame retardant additives to increase its safety. There are many types of flame retardant additives, and there are mainly several used for polyethylene. First, halogens, especially bromine and chlorine, are commonly used. This kind of material is taken from organic molecules, and when burned, halogen atoms are released, trapping free radicals, breaking the chain of combustion, and the effect is obvious. However, its smoke and corrosion, or environmental concerns, are often replaced by environmentally friendly methods in this world.
Second, phosphorus-based flame retardants include both organic phosphorus and inorganic phosphorus, such as phosphates and phosphate esters. These additives precipitate phosphoric acid at high temperatures to form a carbon layer, which coats the surface of polyethylene, isolates oxygen and heat sources, and has the dual flame retardant function of gas phase and condensed matter. Of the three, nitrogen-based additives, especially melamine and its derivatives, are known for their ability to generate non-combustible gases with thermal decomposition products, dilute combustible gases, and cooperate with phosphorus elements to enhance the carbonization effect.
There are also inorganic metals, such as aluminum hydroxide and magnesium hydroxide. This additive acts in a physical way to remove water from burning, absorb heat and cool down, dilute combustible gas, and generate metal oxides to contain fire. Although its dosage is large, it is safe and non-toxic, so it is highly respected when the demand for green environmental protection is becoming increasingly apparent.
In addition, nanomaterials such as nano-clays, carbon nanotubes, etc., although not traditional flame retardants, are added in small amounts to significantly improve the thermal stability and flame retardant properties of the material, and improve the mechanical properties of polyethylene. There are also co-effectors, plasticizers, etc., or main agents to increase work, or to extend the life of the material.
Overall, the flame retardant of polyethylene, with the help of many additives, or chemical, or physical, or dual-effect, has its own strengths. When selecting, it is important to consider its cost, performance and environmental impact, so that it can be used for a long time and avoid danger.
Second, phosphorus-based flame retardants include both organic phosphorus and inorganic phosphorus, such as phosphates and phosphate esters. These additives precipitate phosphoric acid at high temperatures to form a carbon layer, which coats the surface of polyethylene, isolates oxygen and heat sources, and has the dual flame retardant function of gas phase and condensed matter. Of the three, nitrogen-based additives, especially melamine and its derivatives, are known for their ability to generate non-combustible gases with thermal decomposition products, dilute combustible gases, and cooperate with phosphorus elements to enhance the carbonization effect.
There are also inorganic metals, such as aluminum hydroxide and magnesium hydroxide. This additive acts in a physical way to remove water from burning, absorb heat and cool down, dilute combustible gas, and generate metal oxides to contain fire. Although its dosage is large, it is safe and non-toxic, so it is highly respected when the demand for green environmental protection is becoming increasingly apparent.
In addition, nanomaterials such as nano-clays, carbon nanotubes, etc., although not traditional flame retardants, are added in small amounts to significantly improve the thermal stability and flame retardant properties of the material, and improve the mechanical properties of polyethylene. There are also co-effectors, plasticizers, etc., or main agents to increase work, or to extend the life of the material.
Overall, the flame retardant of polyethylene, with the help of many additives, or chemical, or physical, or dual-effect, has its own strengths. When selecting, it is important to consider its cost, performance and environmental impact, so that it can be used for a long time and avoid danger.
Do Flame Retardant Additives for Polyethylene Affect the Mechanical Properties of Polyethylene?
Polyethylene is a commonly used polymer material with good lightness and toughness. It is a material widely used in modern industry and civil use. However, when it is used in wire and cable, construction, transportation and other fields, it needs to have flame retardant properties, so flame retardants are often added to meet safety standards. However, the addition of flame retardants does not affect the original properties of polyethylene, especially the mechanical properties.
Flame retardants are roughly divided into inorganic and organic categories. Inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, etc., have large particle sizes and require high additions to significantly improve the flame retardant effect. It is difficult to disperse evenly in polyethylene, often resulting in loose internal structure of the material and weakened interfacial bonding force. As a result, tensile strength and impact toughness have decreased. Although the amount of organophosphorus and halogen flame retardants is relatively low, some varieties are prone to release acidic gases or decomposition products during processing, accelerating the degradation of molecular chains, and also affecting their tensile and bending properties.
More flame retardants have different compatibility with polyethylene matrices. If there is no good interface layer, micro-cracks will form at the interface, and the performance will deteriorate for a long time. When high filling, the movement of polyethylene molecular chains is limited, and both plasticity and ductility are reduced. If the flame retardant is a powder, it is easy to induce stress concentration between particles, resulting in a decrease in elongation at break. Some flame retardants may also affect the electrical properties and long-term mechanical stability of materials due to their strong hygroscopicity.
With the development of science and technology, composite flame retardants have come into being, supplemented by surface modification technology or nanoparticle dispersion assistance, which can reduce the loss of mechanical properties to a certain extent. However, compared with native polyethylene, most of the mechanical properties without flame retardants are still lagging behind. The only balance between flame retardant and mechanics is the essence of material design.
To sum up, after adding flame retardants to polyethylene, its mechanical properties mostly decrease, depending on the type, dosage, dispersion status and interface treatment of flame retardants. To achieve both safety and practicality, it is necessary to weigh the advantages and disadvantages and choose the best process and formula to balance its performance.
Flame retardants are roughly divided into inorganic and organic categories. Inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, etc., have large particle sizes and require high additions to significantly improve the flame retardant effect. It is difficult to disperse evenly in polyethylene, often resulting in loose internal structure of the material and weakened interfacial bonding force. As a result, tensile strength and impact toughness have decreased. Although the amount of organophosphorus and halogen flame retardants is relatively low, some varieties are prone to release acidic gases or decomposition products during processing, accelerating the degradation of molecular chains, and also affecting their tensile and bending properties.
More flame retardants have different compatibility with polyethylene matrices. If there is no good interface layer, micro-cracks will form at the interface, and the performance will deteriorate for a long time. When high filling, the movement of polyethylene molecular chains is limited, and both plasticity and ductility are reduced. If the flame retardant is a powder, it is easy to induce stress concentration between particles, resulting in a decrease in elongation at break. Some flame retardants may also affect the electrical properties and long-term mechanical stability of materials due to their strong hygroscopicity.
With the development of science and technology, composite flame retardants have come into being, supplemented by surface modification technology or nanoparticle dispersion assistance, which can reduce the loss of mechanical properties to a certain extent. However, compared with native polyethylene, most of the mechanical properties without flame retardants are still lagging behind. The only balance between flame retardant and mechanics is the essence of material design.
To sum up, after adding flame retardants to polyethylene, its mechanical properties mostly decrease, depending on the type, dosage, dispersion status and interface treatment of flame retardants. To achieve both safety and practicality, it is necessary to weigh the advantages and disadvantages and choose the best process and formula to balance its performance.
What is the typical amount of Flame Retardant Additives for Polyethylene?
Polyethylene is the leader of many polymer materials and is widely used in packaging, cables and pipelines. However, it is self-flammable and generates smoke in case of fire, which is not only dangerous to safety but also harmful to the environment. It is often added with flame retardants in the world in order to improve its fire resistance. There are many types of flame retardants, both organic and inorganic. If it is commonly used, aluminum hydroxide, magnesium hydroxide, bromine, phosphorus, and nitrogen are respected by the world. The amount of its addition should also depend on the nature of the flame retardant, the required flame retardant grade, the use of the product and the processing technology.
With aluminum hydroxide, its principle is to decompose water at high temperature, absorb heat for cooling, and dilute the burning area, which can effectively slow down the fire. However, its physical flame retardant effect depends on the dosage, so it often requires high addition. Its addition ratio is more than 30 to 60 parts by mass, and in some cases it is even as high as 70. Compared with bromine and phosphorus, its toxicity is small and the smoke density is low, which is especially suitable for occasions that pay attention to environmental protection and safety.
Brominated flame retardants such as decabromodiphenylethane and brominated cyclohexane are often shared with synergistic agents (such as antimony trioxide). The mechanism of action of brominated flame retardants is the capture of free radicals, which can effectively terminate the combustion chain reaction. The amount of brominated flame retardants is relatively moderate, mostly in the ratio of ten to twenty-five mass parts, supplemented by two to five synergistic agents, which can achieve higher flame retardant grades, such as UL94 V-0. Phosphorus-based flame retardants such as organophosphorus and ammonium polyphosphate are also used in dosages between ten and twenty-five. The volatility and toxicity of these two are higher than that of aluminum hydroxide, but the flame retardant efficiency is also high.
Nitrogen-based flame retardants such as melamine have a good synergy effect with phosphorus-based compatibility. The dosage is adjusted according to the specific formula and target performance, and the dosage is mostly in the ratio of five to fif
In short, the amount of flame retardant used in polyethylene is limited by the nature of the flame retardant, and it is also necessary to take into account the performance, appearance and economy of the product. It is necessary to create a proper balance when the amount of flame retardant added is high. If you want to obtain accurate data, you should use experiments as the basis, followed by theory, and carefully review the raw materials and uses to obtain the best ratio.
With aluminum hydroxide, its principle is to decompose water at high temperature, absorb heat for cooling, and dilute the burning area, which can effectively slow down the fire. However, its physical flame retardant effect depends on the dosage, so it often requires high addition. Its addition ratio is more than 30 to 60 parts by mass, and in some cases it is even as high as 70. Compared with bromine and phosphorus, its toxicity is small and the smoke density is low, which is especially suitable for occasions that pay attention to environmental protection and safety.
Brominated flame retardants such as decabromodiphenylethane and brominated cyclohexane are often shared with synergistic agents (such as antimony trioxide). The mechanism of action of brominated flame retardants is the capture of free radicals, which can effectively terminate the combustion chain reaction. The amount of brominated flame retardants is relatively moderate, mostly in the ratio of ten to twenty-five mass parts, supplemented by two to five synergistic agents, which can achieve higher flame retardant grades, such as UL94 V-0. Phosphorus-based flame retardants such as organophosphorus and ammonium polyphosphate are also used in dosages between ten and twenty-five. The volatility and toxicity of these two are higher than that of aluminum hydroxide, but the flame retardant efficiency is also high.
Nitrogen-based flame retardants such as melamine have a good synergy effect with phosphorus-based compatibility. The dosage is adjusted according to the specific formula and target performance, and the dosage is mostly in the ratio of five to fif
In short, the amount of flame retardant used in polyethylene is limited by the nature of the flame retardant, and it is also necessary to take into account the performance, appearance and economy of the product. It is necessary to create a proper balance when the amount of flame retardant added is high. If you want to obtain accurate data, you should use experiments as the basis, followed by theory, and carefully review the raw materials and uses to obtain the best ratio.
Do Flame Retardant Additives for Polyethylene Have an Environmental Impact?
Polyethylene is an OEM material with light weight, toughness, corrosion resistance, and is widely used in packaging and pipeline fields. However, it is flammable and burns quickly in case of fire, and the smoke and dust cover the eyes, endangering the public. Therefore, flame retardant additives are mostly mixed in to prevent fires. However, flame retardants have different properties, and their impact on the environment is controversial.
Flame retardant additives are generally divided into halogens, phosphorus series, nitrogen series and inorganic numbers. Halogens are flame retardant, mainly bromine and chlorine, which can effectively slow down fires. However, when they are burned or decomposed, more halogenated organics are generated, and microparticles are scattered in the air, causing air and water pollution. Halogenated substances remain in nature for a long time, difficult to dissolve and difficult to dissolve, both bioaccumulative, easy to enter the biological body, disturb endocrine, damage the original environment, and are very harmful. The European Union, America and other developed countries have explicitly restricted their use.
Phosphorus-based flame retardant, phosphoric acid or polyphosphoric acid precipitated during combustion, can promote the formation of carbonization layer, different from halogens, its degradation products are relatively low toxicity, but some categories are also suspected of carcinogenesis. Nitrogen-based flame retardant, mostly derived from light organic nitrides, can release ammonia or inorganic small molecules when burned, most of them are easily soluble in water, less toxic, and the environmental carrying capacity is acceptable.
Inorganic flame retardants, such as aluminum hydroxide and magnesium hydroxide, precipitate water after combustion, absorb heat and dissolve, slow down temperature rise, and the residues are mostly harmless minerals, which are not very harmful to nature. However, it needs to be applied in high doses, or it may damage the mechanical properties of the base material, so it is necessary to weigh the weight when using it.
Cover flame retardant additives for polyethylene, the material has increased, and it also brings environmental concerns. In the process of production, application and waste, or with the escape of dust and sewage, it invades the empty water soil, and then enters the biological chain, endangering the group life. Today's environmental advocates advocate the implementation of green flame retardant, advocate low toxicity, easy degradation, and less residue in the ground, in order to benefit both humans and nature. In short, although flame retardant additives are required for polyethylene, their impact on the environment should not be ignored. Only when carefully selected and managed can we obtain the convenience of materials and avoid ecological concerns.
Flame retardant additives are generally divided into halogens, phosphorus series, nitrogen series and inorganic numbers. Halogens are flame retardant, mainly bromine and chlorine, which can effectively slow down fires. However, when they are burned or decomposed, more halogenated organics are generated, and microparticles are scattered in the air, causing air and water pollution. Halogenated substances remain in nature for a long time, difficult to dissolve and difficult to dissolve, both bioaccumulative, easy to enter the biological body, disturb endocrine, damage the original environment, and are very harmful. The European Union, America and other developed countries have explicitly restricted their use.
Phosphorus-based flame retardant, phosphoric acid or polyphosphoric acid precipitated during combustion, can promote the formation of carbonization layer, different from halogens, its degradation products are relatively low toxicity, but some categories are also suspected of carcinogenesis. Nitrogen-based flame retardant, mostly derived from light organic nitrides, can release ammonia or inorganic small molecules when burned, most of them are easily soluble in water, less toxic, and the environmental carrying capacity is acceptable.
Inorganic flame retardants, such as aluminum hydroxide and magnesium hydroxide, precipitate water after combustion, absorb heat and dissolve, slow down temperature rise, and the residues are mostly harmless minerals, which are not very harmful to nature. However, it needs to be applied in high doses, or it may damage the mechanical properties of the base material, so it is necessary to weigh the weight when using it.
Cover flame retardant additives for polyethylene, the material has increased, and it also brings environmental concerns. In the process of production, application and waste, or with the escape of dust and sewage, it invades the empty water soil, and then enters the biological chain, endangering the group life. Today's environmental advocates advocate the implementation of green flame retardant, advocate low toxicity, easy degradation, and less residue in the ground, in order to benefit both humans and nature. In short, although flame retardant additives are required for polyethylene, their impact on the environment should not be ignored. Only when carefully selected and managed can we obtain the convenience of materials and avoid ecological concerns.
Flame Retardant Additives for Polyethylene How are they dispersed and mixed in polyethylene?
Mix flame retardant additions in polyethylene, and then disperse densely in the compatibility of fine particles. Polyethylene is not stable in the ground, and the molecules are soft. If the addition is not evenly distributed, it is easy to cause uneven performance and flame retardant effect, or physical damage. It is a method of hard work. First measure the ratio of materials, and then match the flame retardant particles, such as oxidizer, oxidizer or phosphorus, nitrogen compounds, etc. Then mix the machinery at high speed, so that the addition of polyethylene and lipid particles are mixed, and the particles are initially dispersed to obtain homogeneous polyethylene. In this stage, the degree of resistance is appropriate to prevent the addition of a base, polymerization, or loss, and the resistance of the addition itself, so as not to cause loss.
In the process of extrusion processing or densification, during the melting process, the force is cut to make the polyethylene flame retardant dense. The screw is rotated, and its force is like a water shock stone, which pushes the addition to the polymer melt, so that the particles are uniformly distributed in the molecular framework. The operating degree is essential, not only to ensure the complete plasticization of the polyethylene, but also to prevent the decomposition of the flame retardant. The high degree of non-resistance is required to prevent the degradation of the polyethylene and the physicalization of the flame retardant. It can be dispersed as appropriate to increase the flame retardant content and composition of the base. It is necessary to partially modify the flame retardant content to make the surface of the polyethylene more compatible and achieve the effect of micro-distribution. Or it can be used to disperse with super, surface active, etc.
The final product is formed, cured by cold, and its properties, flame retardant effect and force, and it is guaranteed that the additives have been embedded in the base. In this way, the flame retardancy of polyethylene and the physical properties of polyethylene are both good, which is ideal for application.
In the process of extrusion processing or densification, during the melting process, the force is cut to make the polyethylene flame retardant dense. The screw is rotated, and its force is like a water shock stone, which pushes the addition to the polymer melt, so that the particles are uniformly distributed in the molecular framework. The operating degree is essential, not only to ensure the complete plasticization of the polyethylene, but also to prevent the decomposition of the flame retardant. The high degree of non-resistance is required to prevent the degradation of the polyethylene and the physicalization of the flame retardant. It can be dispersed as appropriate to increase the flame retardant content and composition of the base. It is necessary to partially modify the flame retardant content to make the surface of the polyethylene more compatible and achieve the effect of micro-distribution. Or it can be used to disperse with super, surface active, etc.
The final product is formed, cured by cold, and its properties, flame retardant effect and force, and it is guaranteed that the additives have been embedded in the base. In this way, the flame retardancy of polyethylene and the physical properties of polyethylene are both good, which is ideal for application.
