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.

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.

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.

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.

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.