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What are the main application fields of PE V2 Flame Retardant?
PE V2 Flame Retardant is a special plastic made of polyethylene material with flame retardant. Its performance is superior, fire-resistant and flame-retardant, and it is widely used in many fields. Where modern technology is changing with each passing day, there are many electrical equipment, and safety concerns are also increasing. It is because people pay special attention to the safety performance of materials when choosing products. PE V2 Flame Retardant came into being, and its main application fields are about several ends.
1. Cable and cable coating. Electric energy circulates everywhere at all times, and cable overload or damage can easily cause fires. PE V2 Flame Retardant has good electrical insulation ability, which can not only resist the harm of current, but also stop the spread of flame. Therefore, it is mostly used to cover wires and cables to protect them from disasters.
Second, electronic and electrical enclosures. Many household appliances and industrial equipment currently have high requirements for flame retardant grades. PE V2 Flame Retardant has excellent thermal stability and physical strength. It is a commonly used material for electrical enclosures. For example, sockets, junction boxes, switch enclosures, etc. are all made of this material. It is used to protect equipment from combustion due to internal and external temperature rises.
Third, the automotive industry. The safety of automotive parts is particularly important, such as dashboards, wire harness sheaths, floor mats, etc., which are often affected by high temperature and current. The use of PE V2 Flame Retardant can significantly reduce the fire hazard and make passengers more comfortable. Automobile manufacturers have promoted this product and are widely used in the interiors and components of new vehicles.
IV. Construction and construction. Modern buildings use plastic pipes and insulation materials, which are not avoided in public and private places. PE V2 Flame Retardant is the best choice for wiring pipes and insulation boards in buildings due to its flame retardant properties, ensuring the overall building fire safety.
V. Packaging and transportation field. The transportation and storage of certain flammable and explosive materials have high requirements on the flame retardancy of packaging materials. PE V2 Flame Retardant is made of packaging film or box, which can not only prevent moisture and dust, but also contain secondary disasters caused by fire sources.
In general terms, PE V2 Flame Retardant has shown its talents in many fields such as wire and cable, electronic appliances, automobiles, construction and packaging due to its excellent flame retardancy and good processability. It promotes safety in the invisible and shields the world from living and working in peace and contentment. It is the crystallization of modern technological progress and human safety awareness.
What standards does PE V2 Flame Retardant meet?
PE V2 Flame Retardant is a flame retardant added to polyethylene to improve its flame resistance. Today's test of its flame retardant properties meets several standards. The first is the International Electrotechnical Commission (IEC) standard, mainly IEC 60695-11-10, flame corrosion test to measure its flaming time and dripping conditions. Secondly, UL 94 standard is widely adopted. V2 grade products, the sample under the specified conditions of flame, extinguished per unit time, and the molten droplet can not ignite the bottom cotton, but the molten droplet self-falling is fine. This grade is slightly inferior to V0 and V1, but it is also better than the HB standard, which is suitable for electronic and home appliance shells.
Looking at the European Union EN 60695 series and GB/T 2408 national standards, they are all based on combustion time, flame propagation and dripping characteristics. In the 3-second flame test, the V2 product should not be extinguished for more than 30 seconds at a single time, and the total combustion time of five times should not exceed 250 seconds. Similar standards such as ASTM D635, ISO 9772, etc., although the measurement methods are slightly different, the main purpose is the same, all of which define the self-extinguishing ability of their materials in the event of an open flame. There are also environmental regulations such as RoHS and REACH, which set limits on the content of flame retardants and harmful substances, so that the promotion of PE V2 flame retardant materials is more and more sound.
As for practical applications, specific product uses need to be considered. For example, low-voltage electrical enclosures, terminal boxes, and lighting accessories are mostly based on the above V2 level as the basic requirements. Its advantage is that it is inexpensive and both flame retardant. The defect is that it can still be dissolved in the event of a large fire. If a higher safety level is required, V1 and V0 grade materials should be selected. Looking at the methods, PE V2 Flame Retardant has actually met the mainstream standards such as UL 94 V2, IEC 60695, GB/T 2408, and ISO, which is sufficient to meet the basic flame retardant needs of general occasions.
However, engineering design should be based on safety, prudent adoption and strict adherence to standards, so as to ensure that mechanical and electrical equipment and civil facilities are safe. The setting of flame retardant standards is really related to safety and should not be ignored. PE V2 flame resistance material is used to help the world and the people, and it should also follow the law to conform to the principles of heaven and earth and the use of human affairs.
What is the addition ratio of PE V2 Flame Retardant?
PE V2 flame retardant is a commonly used flame retardant additive in polyethylene materials. It is used to improve the resistance of polymer materials to flames to meet the requirements of V2 grade. It is commonly found in cables, home appliance shells and various plastic products. Generally speaking, the V2 flame retardant grade is defined according to the UL94 standard. The material needs to self-extinguish within a specified time after the fire source is removed, and the dripping or molten droplets will not ignite the cotton below.
The amount of flame retardant must be weighed according to the material matrix, flame retardant type and end point performance requirements. With PE as the substrate, if brominated or phosphorus-based flame retardants are used, the conventional addition ratio is about 15% -30% (mass fraction), and some high-efficiency varieties can be as low as 10% -15%. However, if you want to reach a higher grade of V0, the addition ratio needs to be increased accordingly. If the addition amount is too high, it may cause the mechanical properties and processing performance of the material to decline, and the color and density will also be affected, so the performance and cost need to be taken into account. The mainstream halogen-free environmentally friendly flame retardants in the market, such as phosphorus and nitrogen series, are often added in an amount slightly higher than bromine, but the safety and environmental protection properties are better.
When designing the formula, synergistic agents such as antimony trioxide and talc powder can be supplemented to reduce the amount of the main agent of the flame retardant and improve the flame retardant effect at the same time. In some systems, the ideal flame retardant level can also be achieved by using the synergy effect and adjusting the proportion of each component appropriately.
In terms of processing technology, it is necessary to ensure that the flame retardant is fully mixed with the PE matrix and dispersed evenly, otherwise the flame retardant effect will be difficult to guarantee. Under specific circumstances, the material needs to be tested for on-line rheology and combustion performance. In case of special products or additional requirements, it is necessary to combine the actual formula, conduct a pre-trial and a pilot test to ensure that the indicators meet the needs.
All in all, the reasonable addition ratio of PE V2 flame retardant is generally set in the range of 10% -30%. The specific value must be comprehensively considered according to the type of flame retardant, material use and performance requirements, and cannot be generalized. The formula requires both flame retardancy and comprehensive properties such as processing and mechanics, which is the key to preparing high-quality flame retardant PE products.
How does PE V2 Flame Retardant affect the mechanical properties of the material?
PE V2 flame retardant, that is, the flame retardant is added to the polyethylene material to reach the V2 grade, which is beneficial to improve the safety of the material in the event of fire. However, flame retardants are not intangible and have far-reaching effects on them. Flame retardants have limited compatibility with PE matrices, often cause uneven dispersion due to polarity differences, the microstructure of the material is disturbed, and the force between molecular chains is weakened, resulting in damage to mechanical properties. It is apparent in the decrease of tensile strength and impact toughness. Tensile test shows that when the flame retardant is filled in, the order of the polymer chain is blocked, and it is easy to slip when subjected to external force, and the fracture stress decreases. Secondly, the flame retardant is mostly inorganic particles, which are distributed in the matrix, forming a stress concentration area at the interface, and the external force transmission is not smooth, causing brittleness to increase and
PE is flexible, but after flame retardant, the internal fillings increase, and internal defects, such as voids and agglomeration, are the root cause of cracking. In the impact resistance test, the material's energy absorption capacity is reduced, and the probability of brittle cracking is greatly increased. Fracture investigation shows that flame retardant particles are the initiation of cracks. When an external force acts suddenly, the crack spreads rapidly and the bearing limit is low. In terms of hardness, due to the hard nature of some flame retardants, the overall hardness can be slightly improved, which will damage the overall balance of the machine. The unity of physical properties is also lost, and the anisotropy is enhanced.
The morphological structure has also changed. The crystallinity of primary polyethylene decreases due to the intervention of flame retardants, and the molecular chain arrangement is messy, resulting in poor movement of the long chain, which in turn affects the elastic modulus and makes the material more brittle. The particle size, type and content of flame retardants vary, and the effect on performance is also different. The larger the particle size and the greater the agglomeration, the more serious the performance damage. Those with fine particle size and good dispersion can be controlled and reduced, but the overall is still far from pure PE.
Although the mechanical properties are many unfavorable, the need for safety protection often overrides the loss of mechanics. In practical applications, it is necessary to coordinate its profits and losses, and balance the balance between flame retardancy and mechanics, in order to achieve the optimization of material properties.
What are the requirements for storage and transportation of PE V2 Flame Retardants?
PE V2 Flame Retardant is a polyethylene reinforced flame retardant material. Its properties are specific, and storage and transportation must be cautious. If it is inappropriate, it may cause damage or lose its effectiveness. The following precautions are mentioned below:
1. The way of storage is to prevent fire and explosion. Because of its flame retardant, although it suppresses fire, the raw material is still afraid of high temperature. If it encounters flames, it may evaporate or decompose, endangering the environment. It should be stored in a cool and ventilated place, away from fire and heat sources, and away from strong oxidants and flammable and explosive materials. The reservoir should be sealed to prevent water vapor from penetrating and causing changes in properties. The warehouse should be equipped with fire extinguishing equipment, suitable for dry powder or carbon dioxide, etc., and should not be covered with water to avoid adverse reactions with the material.
2. When handling, it should be handled with care, and it should not be thrown or beaten. The appearance of PE V2 Flame Retardant is mostly granular, powder or flake. If it is violently impacted, or scattered unevenly, or static electricity is generated. The inside of the transportation vehicle should be clean and dry, and there should be no odor or oil stains. Loading and unloading should be slow, so that the packaging is intact. The order is clear and the logo is clear to prevent confusion.
3. It should be stored in batches and not in the same room as other chemicals. If it needs to be stored for a long time, it should be inspected regularly to see if it is damp, agglomerated and deteriorated. If any abnormalities are found, they should be isolated immediately to prevent the spread of pollution. If there is any leakage, it can be collected with clean tools and should not be rinsed with water to avoid secondary reactions.
4. During transportation, the vehicle should be covered to avoid exposure to the hot sun and rain. Walk at a steady speed, do not turn the emergency brake to prevent scattering. The bill is ready for inspection and the documents are complete. In case of special climate or long-distance travel, protective measures should be added to ensure safety.
In short, the PE V2 Flame Retardant storage and transportation method focuses on heat prevention, fire prevention, moisture prevention, pressure prevention and pollution prevention. Check its condition at any time and dispose of it with caution. In this way, the material will last for a long time and its effectiveness will be obvious.