Flexible Pu Foam Flame Retardant

Flexible PU Foam Flame Retardant

    Specifications
    HS Code 940599
    Flammability Retards flame spread
    Density Typically within a certain range for flexible foams
    Thermal Stability Maintains structure under heat
    Chemical Resistance Resistant to some chemicals
    Mechanical Strength Flexible yet has some durability
    Aging Resistance Resistant to degradation over time
    Smoke Generation Generates less smoke when burning
    Toxic Gas Emission Low toxic gas release during combustion
    Color Stability Doesn't change color easily
    Processability Can be easily processed into various shapes

    As an accredited Flexible PU Foam Flame Retardant factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Flexible PU Foam Flame Retardant: Packed in 25 - kg bags for easy handling.
    Storage Flexible PU Foam Flame Retardant should be stored in a cool, dry, well - ventilated area. Keep it away from heat sources, open flames, and direct sunlight to prevent degradation. Store in tightly sealed containers to avoid moisture absorption and contact with reactive substances. Maintain storage temperature within the recommended range, typically between 5 - 35°C, to ensure product integrity.
    Shipping Flexible PU Foam Flame Retardant is shipped in well - sealed containers to prevent leakage. It adheres to strict chemical shipping regulations, ensuring safe transportation by land or sea, with proper hazard labeling.
    Free Quote

    Competitive Flexible PU Foam Flame Retardant 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.

    We will respond to you as soon as possible.

    Tel: +8615380400285

    Email: sales2@liwei-chem.com

    Flexible PU Foam Flame Retardant Flexible PU Foam Flame Retardant
    General Information
    Historical Development
    Polyurethane foam began in the middle of the twentieth century, and was first created by Western craftsmen. At that time, industry was prosperous, and household and automobile uses were competing for adoption. However, its flammability, in case of fire and smoke burst, the public was worried, so the flame retardant technology came into being. In the early days, halogens and phosphating mixtures were used to reconcile, although it slightly suppressed the flame potential, it was poisonous and the environment was damaged. In the next two decades, with the advancement of science and technology, scholars turned to explore halogen-free flame retardant, with both function and environmental protection. New materials came to life, nano and synergistic compounds came out, with excellent performance, both safety and ecological benefits. Today, flame retardant polyurethane foam has a wide range of production methods and has been widely used in the world, which is a confirmation of historical evolution and scientific progress.
    Product Overview
    This flexible polyurethane foam flame retardant is a sophisticated material specially developed to improve the fire resistance of foam products. It is warm and fast-acting, easy to be compatible with a variety of polyurethane systems, and has significant flame retardant benefits with less addition. Used in mattresses, furniture, seats, packaging and many other fields, it can not only significantly reduce the combustion rate, but also reduce the release of smoke and harmful gases. Its texture is stable, the original softness and elasticity of the product are not hindered, and the process is simple and does not damage the foaming process. The flame retardant grade conforms to a number of international standards, helping the product to spread in the markets of various countries. And this product is green and environmentally friendly, halogen-free and non-toxic, safe and reliable. It is actually required for modern high-performance and high-safety needs. It is a good partner for home office, demonstrating its spirit of paying equal attention to technology and humanistic care.
    Physical & Chemical Properties
    Flexible polyurethane foam flame retardant, the appearance is mostly light yellow or gray-white, light texture, soft to the touch, easy to compress. Its density is low, porosity is high, water absorption is small, and it has good resilience. Soluble in common organic solvents but insoluble in water, excellent heat resistance, stable properties at room temperature; in case of open fire, it releases invisible refractory gases, which can delay the spread of flame. It has excellent flame retardant properties, low amount of smoke during combustion, and little release of harmful gases. Chemical stability, resistance to a variety of acid and alkali corrosion, good affinity with polyurethane matrix, not easy to precipitate. In addition, the molecular structure is complex, containing a variety of active groups, which can effectively cross-link with the matrix and enhance its overall mechanical properties. Therefore, it is widely used in household, transportation and other fields to prevent fires.
    Technical Specifications & Labeling
    Flexible PU Foam Flame Retardant is a polyurethane flexible foam with flame retardant effect. In terms of density, it is usually between 18 and 60 kilograms per cubic meter. Appropriate thickness, can be cut as needed. Its oxygen index is higher than 26%, combustion is slowed down, self-extinguishing in case of fire, low smoke and dust, suitable for indoor use. Compression permanent deformation rate does not exceed 10%, thermal conductivity is about 0.032-0.040 W/m · K, good support, durability is not easy to collapse. Water absorption is very small, chemical corrosion resistance, no mildew in case of moisture. Labeled with RoHS, REACH and other environmental protection certifications. The colors are yellow, white, gray and black, and can withstand temperatures from -40 to 120 degrees Celsius. It is suitable for furniture, transportation, and home appliances. The sheet or coil packaging is accompanied by a product description and test certificate for identification.
    Preparation Method
    However, for the preparation of flexible polyurethane foam flame retardants, polyether polyols and isocyanates are selected as the main materials, supplemented by intumescent flame retardants such as phosphorus and nitrogen compounds, and necessary multi-functional additives. Take the raw materials, mix them in turn, stir slowly, and make them uniform. Following an appropriate amount of water, foam formation is promoted, and catalyzed by tin, amine or carboxylate salts, the hydroxyl groups in the raw materials are additionally polymerized with isocyanate to form urea ester bonds. During this time, the flame retardants are uniformly distributed with the foam structure, or embedded in the molecular chain, or in a synergistic manner to inhibit thermal decomposition, forming a dense carbon layer to isolate the oxygen source and contain the spread of flames. The whole process requires strict control of temperature and reaction rate to form a flexible foam with uniform pores and tough skeleton, which not only maintains elasticity, but also increases flame retardancy.
    Chemical Reactions & Modifications
    Polyurethane soft foam is flexible in nature, but flammable in case of fire. Chemical reaction modification, can give flame retardant ability. The method uses flame retardants containing phosphorus, nitrogen or halogen, or introduces inorganic nanomaterials. During polymerization, flame retardants are mixed in polyols or isocyanates in advance, or surface treated after the foam is formed. In the reaction, the flame retardant components are cross-linked and fused with the bubble skeleton, which not only suppresses heat and reduces smoke, but also enhances structural stability. If reactive flame retardants are used, their functional groups are embedded in the main chain, and the flame retardant effect lasts for a long time; additive flame retardants are dispersed in the pores. Although the process is simple, there are worries about migration and precipitation. When the flame is burning, the flame retardant molecules release phosphoric acid, amine or halogen, capture free radicals from the gas phase, or generate carbon shells in the condensed phase to isolate heat sources. The way of chemical modification, existing performance, and re-increase safety are the essential paths for polyurethane flame retardancy.
    Synonyms & Product Names
    Flexible polyurethane foam flame retardant, aliases are many, including elastic PU foam flame retardant, and polyurethane soft foam flame retardant additive, or simply soft foam flame retardant. Its trade name is also diverse, and there are FLAMEGUARD PU, SOFTSAFE FR, POLYFLAME 800, etc. on the market. Or advertised as Flexible Foam Retardant, or PU Foam FR Additive. Although the names are different, they actually refer to one, and they are all used to improve the flame resistance of polyurethane soft foam. According to the production method, there are two kinds of liquid type and powder type, which are widely used. When purchased by the market, or brand first, such as EverSafe, DuraShield, or heavy performance, it is called Match-Foam, Pro-Guard. However, its efficacy lies in the slow release of fire and the tranquility of the protective material. General terms and special terms are mixed and used differently. Although hundreds of names are unique, they are actually the same function.
    Safety & Operational Standards
    Anyone who uses Flexible PU Foam Flame Retardant must first understand its nature, know its use, and detect its danger. It is used in polyurethane foam to prevent burning and anti-inflammatory. Although it is beneficial to safety, it is still a chemical product, and the operation must be cautious. Place it indoors, when it is ventilated and dry, and there is no open flame. It is strictly forbidden to be in close proximity to acids, alkalis, strong oxidants and flammable substances. When handling hands, prepare gloves, masks, and goggles first, so that the skin and mucous membranes do not connect with it. If there is a splash, wash it with clean water urgently, and it is still difficult to solve, it is recommended to seek medical treatment. When handling packaging, handle it with care, do not damage the container and leak liquid, and do not expose it to high temperature to prevent it from changing and causing damage. The temperature of the storage environment should be constant, away from children and unrelated people, etc. Do not eat or taste.
    After opening, it should be properly sealed and stored. Do not leave it in the air for a long time to prevent it from evaporating or feeling with moisture. After using the finished utensils, be sure to clean them completely, and the residual liquid is discarded. It must be in accordance with local environmental protection laws. Do not pour them into the ditch soil at will to prevent pollution. When mixing foam, be sure to ensure that the proportion is not excessive, otherwise it will not harm the structure and also damage people. In case of fire, use chemical foam, carbon dioxide, and dry powder fire extinguishing agent for emergency response. Do not extinguish the fire with water, so as not to exacerbate the reaction.
    Emergency washing equipment and ventilation facilities are required in the operation room to prepare for emergencies. After daily work, make inspections to prevent problems before they occur. Those who are responsible for inspection need to record the details of each operation according to the rules to facilitate inspection and audit. Don't cause major disasters due to petty negligence. It is necessary to follow the law when operating Flexible PU Foam Flame Retardant to ensure the safety of people and goods. It is far from unexpected that it is not yet minted, and the residence is safe and the effect of Changzhi.
    Application Area
    Flexible polyurethane foam flame retardant is widely used in many contemporary fields. Its material is soft and has outstanding flame retardant properties, so it is favored by furniture, automobiles, aerospace, construction and other industries. Such as seats and mattresses, they all depend on their safety and comfort; cabins, trains, aircraft interiors also use them to ensure the safety of passengers. In buildings, walls, ceilings, sound insulation boards, etc. are also heavily insulated and fireproof. Electronic product casings and packaging are also frequently used because of their shock absorption and flame retardancy. Medical equipment, especially in nursing mattresses and ward decoration, can be seen. Flexible polyurethane foam flame retardant is widely used, protecting life and property, and helping modern industrial development is indispensable.
    Research & Development
    Flexible polyurethane foam is widely used in furniture, automobiles, construction and other fields, but it is flammable in case of fire and has great safety hazards. Therefore, those who specialize in modern technology focus on improving its flame retardant performance. It is to choose a new type of flame retardant, taking into account environmental protection and high efficiency, to change its molecular structure, so that it gives the foam fire resistance. The polymerization process is also improving day by day, fine-tuning the foaming parameters to achieve the coexistence of flame retardancy and comfort. The test results show that its oxygen index is significantly improved, and the smoke release is also significantly reduced. Further, taking into account the softness and durability of the product, it is suitable for multiple applications. It can be seen that flexible polyurethane foam flame retardant technology has entered a new stage, but continuous research and development and innovation are still the common pursuit of the industry. Only with sincerity and dedication can we ensure the safety of human settlements and the prosperity of the
    Toxicity Research
    Flexible polyurethane foam is commonly used in contemporary furniture, bedding, and interior decoration. However, it will ignite in case of fire, which will cause major disasters. The old man then added flame retardants, so that he can live in peace. However, there are many flame retardants, or they contain bromine, phosphorus, or sodium inorganic, and their reasons are different. However, if something enters the body, it is harmless? According to modern scholars' observations from animal experiments and cell testing, the flame retardants used in flexible polyurethane foam can release harmful substances under combustion or normal conditions. If halogenated hydrocarbons and phosphorus compounds are used, they may cause cytotoxicity and genetic damage. And in the environment for a long time, the human body may suffer from breathing and skin absorption, causing liver and kidney damage, and it is suspected of carcinogenesis. In Europe and the United States, the dosage is regulated and replaced by non-toxic or low-toxic new materials. Recently developed polymer flame retardants, in order to reduce their migration and release, but the effectiveness and safety are not fully integrated, there is still a need for detailed research.
    Future Prospects
    Flexible polyurethane foam flame retardants are of great importance to industry. Because of their light material and excellent performance, they are widely used in furniture, transportation, construction and many other fields. However, the hidden worries of fire are in urgent need of innovative measures. Today's chemical field is advanced, and new flame retardant materials are emerging. With the purpose of green environmental protection, low toxicity and high efficiency, it promotes technological upgrading. Looking to the future, bio-based flame retardants may rise, and nanomaterials may add wings. The preparation process is becoming more and more precise, and the compatibility and durability are increasing. International environmental regulations are becoming stricter and stricter, driving the industry to move towards sustainable and recycled use. In the foreseeable future, flexible polyurethane foam flame retardants will be more widely used in places with high safety standards, providing long-term support for human settlements and green development, and then leading the new trend of material technology.
    Where to Buy Flexible PU Foam Flame Retardant in China?
    As a trusted Flexible PU Foam Flame Retardant manufacturer, we deliver: Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements. Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery. Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
    Frequently Asked Questions

    As a leading Flexible PU Foam Flame Retardant 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 ingredients of Flexible PU Foam Flame Retardant?
    Polyurethane flexible foam (Flexible PU Foam) is a commonly used material in today's world, mostly used in furniture, mattresses, car seats, etc. Its flame retardancy is also valued by modern industry. To make it flame retardant, chemists often add flame retardants to its formula. The main components of flexible polyurethane foam, one is a polyol, which carries an organic skeleton; the other is an isocyanate, which can be diisocyanate (such as toluene diisocyanate TDI or diphenylmethane diisocyanate MDI), which is commonly used to polymerize with polyols to form a polymer backbone.
    is the ability to add flame retardant, often accompanied by various flame retardants. Common are organophosphorus flame retardants, such as tris (2-chloropropyl) phosphate (TCPP) and tris (phenyl) phosphate (TPP), which can decompose and release acidic substances in case of fire by integrating into the foam system, forming a carbonization layer to block heat sources and slow down combustion. Or brominated flame retardants such as decabromodiphenyl ether (DecaBDE), which release hydrogen halide when decomposed, inhibit free radical reactions and delay combustion expansion. However, halogenated flame retardants are prone to smoke and toxic gases, so they are gradually becoming environmentally friendly alternatives. Organophosphorus and nitrogen composite flame retardants are also used nowadays, which can jointly suppress fire in the gaseous and condensed phases.
    In addition, a small amount of foaming agent, cross-linking agent, catalyst and other auxiliary materials are required for foam formation. When foaming, water reacts with isocyanate to release gas, which is the source of bubble formation. Catalysts such as triethylenediamine accelerate polymerization and foaming reactions.
    To sum up, the main components of flexible polyurethane foam flame retardants are polyols and isocyanates as the main bone, accompanied by phosphorus or halogen flame retardant additives, as well as auxiliary materials for foaming, cross-linking and catalysis. The ingredients are carefully proportioned to ensure that the foam is flexible and light, and meets the standards of flame retardant and security. It is an indispensable material in today's industrial and civilian fields.
    What is the Flexible PU Foam Flame Retardant Grade?
    Flexible polyurethane foam (Flexible PU Foam) is a commonly used material in modern furniture, vehicle seats, etc. People are worried about its flammability, so flame retardants are widely added to improve its flame retardant properties. Flame retardant grades are often assessed according to a variety of international standards, such as US UL 94, British BS 5852, GB/T 20284, etc. Taking UL 94 standard as an example, flexible polyurethane foam is mostly tested in UL 94 HF-1, HF-2 and HBF grades. HF-1 is the highest in its flame retardant grade, with the fastest self-extinguishing speed, and the dripping material does not ignite the cotton pad; HF-2 can also self-extinguish, but the dripping material may be at risk of ignition; HBF has a slower self-extinguishing speed and slightly poorer flame resistance. To measure the flame retardant grade of the material, it is necessary to synthesize its ignition length, self-extinguishing time and the effect of burning droplets. If the flame retardant is added sufficiently during the molding process, and it should be strictly carried out according to the inspection specifications, it can reach the UL HF-1 grade of 94.
    In Europe, flexible polyurethane foam is often inspected in BS 5852, which is divided into CRIB 5 and CRIB 7 grades. The CRIB 5 coke test is extremely demanding. It is a high standard flame retardant grade and is often used in high-end public places. If it meets these standards, the flame retardant performance can be described as excellent. Chinese standards GB/T 20284, GB/T 8626, etc. are also graded, with V-0, V-1, etc., and V-0 is the highest grade. However, the evaluation methods and severity of different standards are different. It is necessary to identify the categories and should not be confused.
    The petrochemical process is fine. When manufacturing flexible polyurethane foam, if high-efficiency halogen-free or bromine-based and phosphorus-based flame retardants are used and evenly distributed in the matrix, it will be able to pass the flame retardant test and reach advanced standards such as HF-1 or V-0. However, the level of flame retardant grade must be based on actual testing, and cannot be based on the type or proportion of additives. In summary, the flame retardant grade of Flexible PU Foam, depending on the standard and actual performance applied, can generally reach UL 94 HF-1, BS 5852 CRIB 5 or national standard V-0, which is higher than today's flame retardant materials. Only the specific grade depends on the test data and cannot be generalized.
    Is Flexible PU Foam Flame Retardant Environmentally Friendly?
    Polyurethane flexible foam is a commonly used material in today's industry and is widely used in furniture, automobiles and buildings. In order to enhance its flame retardant properties, flame retardants are often added. However, these flame retardants are mostly based on organic halogens, phosphorus, nitrogen and inorganic elements. Although they can effectively inhibit combustion, whether they are environmentally friendly or not is debatable.
    Or halogen flame retardants, they decompose in fire, easily release toxic fumes, pollute the air, and endanger human body and ecology. It is difficult to degrade in the environment, and is easy to accumulate in water and soil, or ingest into organisms through the food chain. Studies have shown that long-term exposure to halogen flame retardants may damage the endocrine system and be extremely toxic to aquatic organisms. Phosphorus and nitrogen flame retardants are relatively untoxic, but some varieties may also precipitate harmful gases when decomposed at high temperature. Inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, etc., are less harmful, but their addition is huge, or affects the original performance of the foam, and its production process also consumes a lot of energy, which is difficult to say.
    Looking around the world, degradable or bio-based flame retardants are a new story. Although they have little impact on the environment, their popularity is still low, and their performance and cost need to be optimized. Although flame retardants are kept safe and protect people's lives and property in flexible foam, it is beyond reproach that they cause chemical leakage and waste disposal problems, which cannot be ignored. Burning waste foam may cause harmful gases to escape; buried in soil, there is also chronic leakage. Spill into the atmosphere, rivers and lakes, and will eventually accumulate harm in all directions.
    In conclusion, flexible polyurethane foam flame retardants are effective in flame retardancy, but environmental friendliness is far from being beautiful. With the progress of chemical industry, green flame retardants are the trend in the future, but the status quo is difficult in many steps. Advocate green manufacturing and improve the recycling system, so that materials can be recycled, in order to alleviate its damage to heaven and earth. Jin Xuantong said: "To maintain the harmony of nature, we must choose carefully." Looking forward to the advancement of science and technology, people are good, both safe and ecological, so the world and the use of it will be prosperous.
    Does the Flexible PU Foam Flame Retardant emit harmful gases during use?
    Polyurethane soft foam, known as PU Foam in the world, is widely used in seats, mattresses and thermal insulation materials. It is soft and elastic, light and firm, but the flammable risk is a concern. Nowadays, people use flame retardants for fire protection and safety. However, flame retardants mostly use compounds such as bromine and phosphorus, or organochlorine, etc. Although they can reduce combustion and are flammable, they may not be pure when used or incinerated. Cover such chemicals, under normal temperature, although they do not dissipate very much, they will gradually decompose over time, or due to heating, friction, and sunlight, releasing volatile organic compounds and trace harmful gases such as formaldehyde, benzene, toluene, etc. In case of intense fire and sudden increase in temperature, the decomposition will intensify, and the flame retardant will react with polyurethane to release hydrogen bromide, phosphorus oxide, hydrogen chloride and other asphyxiating gases, which are irritating and toxic, endangering respiratory health. Or it may not be burned but only evaporated due to high temperature, and some organic compounds escape. Although the amount is small, it cannot be ignored.
    Considering its production process, some flexible foams leave trace monomers, catalysts and flame retardants themselves when foaming. Over time, they gradually decompose or evaporate and disperse in the air. If people spend a long time in it, they may accumulate in small amounts, or cause dizziness, fatigue, and throat discomfort, especially for those who are sensitive. Studies have shown that benzene series and formaldehyde are carcinogens, and some components of flame retardants may disrupt endocrine. It can be seen that in order to ensure its safe use, a low-release, environmentally friendly flame retardant system must be selected, and appropriate ventilation should be used to reduce the harm of indoor pollution.
    General discussion of flexible PU foam flame retardant products, its safety depends on the raw materials, process and use environment. Although flame retardant is good for security, it cannot be ignored to release harmful disadvantages. It is necessary to choose carefully and timely, and add testing and treatment at times, so that you can take advantage of advantages and avoid disadvantages and ensure people's well-being.
    What industries and scenarios is Flexible PU Foam Flame Retardant suitable for?
    Polyurethane flexible foam (ie Flexible PU Foam) is the most exquisite material in the world and is widely used in many utensils. If a flame retardant agent is added, its fire resistance performance is even better. This flame retardant flexible foam is used in many industries, relying on its lightness and flexibility, shock absorption, heat insulation and noise reduction and many other benefits, and fire protection is even more guaranteed.
    Inquire about the application of flame retardant polyurethane soft foam today, and the first is the home field. The cores of bedding, tatami, sofa, seat cushions and pillows are mostly filled with this. The flame retardant ability ensures the safety of the room and prevents the risk of anti-fire. Secondly, the automotive industry also uses it for seats, headrests, armrests, door interiors, etc. Because the means of transportation are easy to circulate among people, the fire is critical, and the flame retardant soft foam can slow down the fire and ensure the safety of the car. Again, the use of aerospace and railway transportation is particularly prosperous, and the machine seat, bedding, interior, etc. are all necessary for fire prevention. The flame retardant foam is embedded in it, which can prevent accidents and comply with international safety regulations.
    Among office cultural and educational supplies, the flame retardant soft foam is also the choice of Ming Zhe. Office chair cushions, conference room chairs, and reading room sofas are all comfortable and durable, and not easy to burn, which is conducive to the safety of people in crowded places. Looking at medical apparatus, hospital bed mattresses, wheelchair cushions, etc., their flame retardant function can add a pillar to the safety of hospitals and prevent accidental fires from affecting patients.
    In the electronic and electrical industry, flame retardant flexible foam is used for cushioning and insulation, wrapping between electronic components or circuit boards to ensure that overheating or short circuit will not spread into disasters. There is also the logistics and packaging industry, where precious and fragile utensils need buffer protection, and sometimes flame retardant requirements need to be combined to prevent fires in storage or transportation.
    Stage sets, theater seats, exhibitions and various public spaces can be enriched with flame retardant polyurethane foam, which is not only beautiful and comfortable, but also fire-resistant first. With such various uses, it can be seen that flame retardant polyurethane soft foam has become a safety material for modern industries, and its use cannot be ignored.