Polypropylene Flame Retardant Compound
| HS Code | 141750 |
| Flammability Rating | Highly flame - retardant |
| Melting Point | 160 - 170°C |
| Density | 0.9 - 0.91 g/cm³ |
| Tensile Strength | Typically 20 - 30 MPa |
| Flexural Modulus | 1000 - 1500 MPa |
| Impact Strength | Varies based on formulation, can be moderate to high |
| Thermal Stability | Good up to around 150°C in continuous use |
| Chemical Resistance | Resistant to many common chemicals |
| Electrical Insulation Properties | Good electrical insulator |
| Processing Temperature | Around 200 - 230°C |
As an accredited Polypropylene Flame Retardant Compound factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Polypropylene Flame Retardant Compound is usually packaged in plastic woven bags with thick inner membranes, tied with tough ropes, and tightly sewn to ensure good sealing. For high-end products or long-distance transportation needs, metal barrels are used for packaging, and the barrels are lined with corrosion-resistant plastic films. The barrels are marked with product names, specifications, warning signs, etc. to ensure safe transportation and storage. |
| Storage | To store Polypropylene Flame Retardant Compound, a dry, ventilated, and cool warehouse is required. The product should be placed on wooden pallets and raised off the ground to facilitate air circulation. The stacking height is appropriate to avoid damage to the packaging due to heavy pressure. Fireworks are strictly prohibited in the warehouse, and it must be stored separately from oxidants, acids, alkalis and other chemicals to prevent chemical reactions and affect product quality. |
| Shipping | To transport Polypropylene Flame Retardant Compound, clean and dry trucks or containers are selected. During transportation, cover tightly with tarpaulins. During loading and unloading, throwing and rolling are strictly prohibited to avoid damage to the packaging. If the packaging is found to be damaged or leaking, measures should be taken immediately to properly handle it to prevent the product from scattering and polluting the environment. |
Competitive Polypropylene Flame Retardant Compound 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
Historical Development
In ancient times, fire prevention used bricks, stones, soil and other non-combustible materials to build homes to prevent fire hazards. With the advent of plastics, it quickly became popular in various industries due to its many advantages such as light weight, easy molding and low cost. However, the flammability of plastics such as polypropylene has become a safety hazard. In the early days, people tried to mix natural flame retardants, such as certain mineral powders, into plastics, but the effect was not good.
With the development of the chemical industry, scientists began to develop special flame retardants. At first, halogen flame retardants were prevalent. Although the flame retardant effect was significant, toxic gases were released during combustion, which harmed the environment and human health. Since then, halogen-free flame retardants have become the focus of research. After years of exploration, a variety of halogen-free flame retardant systems have been born, such as phosphorus-based, nitrogen-based, and intumescent flame retardants. Polypropylene Flame Retardant Compound is made by compounding multiple flame retardant ingredients. Its performance is continuously optimized, from the initial simple mixing to the current precise formula design, which meets the stringent requirements of polypropylene flame retardancy in different fields.
With the development of the chemical industry, scientists began to develop special flame retardants. At first, halogen flame retardants were prevalent. Although the flame retardant effect was significant, toxic gases were released during combustion, which harmed the environment and human health. Since then, halogen-free flame retardants have become the focus of research. After years of exploration, a variety of halogen-free flame retardant systems have been born, such as phosphorus-based, nitrogen-based, and intumescent flame retardants. Polypropylene Flame Retardant Compound is made by compounding multiple flame retardant ingredients. Its performance is continuously optimized, from the initial simple mixing to the current precise formula design, which meets the stringent requirements of polypropylene flame retardancy in different fields.
Product Overview
Polypropylene Flame Retardant Compound is a carefully formulated mixture that combines the strengths of multiple flame retardant ingredients. It is mostly granular or powdery in appearance, with uniform color, and is easy to mix with polypropylene raw materials. It has good compatibility with polypropylene and can give polypropylene excellent flame retardant ability without significantly affecting the original physical properties of polypropylene, such as strength, toughness, and processing performance. It can effectively inhibit the combustion of polypropylene, reduce the speed of flame propagation, and reduce smoke generation. It is widely used in the production of polypropylene plastic products, such as home appliance housings, automotive interiors, and building pipes, greatly improving the fire safety performance of products.
Physical & Chemical Properties
In terms of physical properties, its particles or powders have uniform particle size and are easy to disperse. The density is similar to that of polypropylene, which is conducive to uniform mixing. The melting point and decomposition temperature are higher than the processing temperature of polypropylene, ensuring stability during processing. Insoluble in water, partially soluble or dispersed in common organic solvents, suitable solvents can be selected for preparation according to different processing requirements.In terms of chemical properties, the flame retardant components contained in it undergo chemical reactions such as decomposition, dehydration, and carbonization when exposed to high temperatures. For example, phosphorus-based components can promote the formation of a carbonaceous layer on the surface of polypropylene to isolate oxygen and heat; nitrogen-based components decompose to produce non-flammable gases, diluting the oxygen concentration; intumescent flame retardants expand when heated to form a porous foam carbon layer to enhance the thermal insulation effect. The various components work synergistically to achieve efficient flame retardancy. At room temperature, the chemical properties are stable, no adverse reactions occur with polypropylene and other common additives, and the storage stability is good.
Technical Specifications & Labeling
Polypropylene Flame Retardant Compound has strict technical specifications. Flame retardant performance must meet specific standards, such as UL94 flame retardant grades, which are commonly V-0, V-1, V-2, etc., depending on the application scenario. The content of active ingredients is precisely controlled, and the proportion of each flame retardant is scientifically formulated to ensure stable performance. The volatile matter and moisture content are extremely low, which prevents bubbles from being generated during processing and affects product quality. The particle size distribution meets the requirements and ensures uniform dispersion in polypropylene.The product label is detailed, with the full name Polypropylene Flame Retardant Compound, and clearly lists key information such as flame retardant grade, active ingredient content, applicable polypropylene type, recommended addition ratio, storage conditions, shelf life, etc. At the same time, safety warning signs are marked to remind users of precautions.
Preparation Method
To prepare Polypropylene Flame Retardant Compound, first select high-quality flame retardant raw materials, such as phosphate esters, melamine, pentaerythritol, etc. According to the precise formula ratio, put each raw material into a high-speed mixer, stir and mix thoroughly, and make it initially uniformly dispersed. Then use a twin-screw extruder for melt blending. Under the action of high temperature, high pressure and strong shear force, each component is further evenly dispersed and partially chemically reacted to form a stable composite system. The extrudate is cooled, granulated or crushed to make the required granular or powdered products, and finally quality inspection and packaging are carried out.
Chemical Reactions & Modifications
During the processing of polypropylene, the components of Polypropylene Flame Retardant Compound interact with polypropylene molecules. Flame retardants decompose under heat, releasing active substances, reacting with polypropylene pyrolysis products, changing the pyrolysis path, promoting carbonization, and inhibiting the generation of flammable gases. In order to improve performance, they are often modified. For example, surface treatment of flame retardants is performed to improve compatibility with polypropylene; synergists are added to enhance the synergistic effect of various flame retardant components; new formulas are developed to meet the needs of different polypropylene varieties and application scenarios.
Synonyms & Product Names
Polypropylene Flame Retardant Compound is also called "polypropylene flame retardant masterbatch" and "polypropylene flame retardant compound". However, in professional literature, product standards and commercial transactions, the standard name is Polypropylene Flame Retardant Compound to accurately convey the product characteristics and uses to avoid confusion.
Safety & Operational Standards
When operating Polypropylene Flame Retardant Compound, workers need to wear protective equipment, such as dust masks, protective gloves, work clothes, etc. to prevent dust inhalation and skin contact. The operation area should be well ventilated to avoid dust accumulation. Eating, drinking and smoking in the operation area are strictly prohibited. Wash your body and change clothes in time after work. When storing, strictly abide by the warehouse management regulations and regularly check whether the packaging is intact and whether the product has deteriorated. When transporting, load and unload gently to prevent the packaging from being damaged.
Application Area
In the field of home appliances, it is used to manufacture the shells of refrigerators, televisions, washing machines, etc. to improve fire safety and protect the lives and property of users. In the automotive industry, it is used in automotive interior parts such as dashboards, seats, door panels, etc. to reduce the risk of fire in the car. In the construction industry, it is used to produce building pipes, insulation materials, etc. to meet the requirements of building fire protection regulations. In addition, it is also widely used in the fields of electronic appliances, wires and cables, packaging materials, etc., effectively improving the fire resistance of polypropylene products.
Research & Development
Researchers continue to explore the research and development direction of Polypropylene Flame Retardant Compound. On the one hand, in-depth research on the flame retardant mechanism provides theoretical support for optimizing the formula; on the other hand, new flame retardant ingredients and composite technologies are developed to improve flame retardant efficiency, reduce the amount of addition, and reduce the impact on polypropylene performance. At the same time, we pay attention to environmental protection requirements, develop green, non-toxic, and degradable flame retardant systems, and expand their application in environmentally friendly polypropylene materials. In addition, special flame retardant products are developed for special application scenarios, such as high temperature, high humidity, and highly corrosive environments.
Toxicity Research
After a large number of toxicity experiments, Polypropylene Flame Retardant Compound has low toxicity. Under normal use, it will not cause obvious harm to the human body and the environment. However, some ingredients may be slightly irritating, and protection is required during production operations. When burning, compared with halogen flame retardants, it releases less toxic and harmful substances, which meets the current environmental protection and safety standards.
Future Prospects
In the future, as people's awareness of safety and environmental protection increases, the demand for Polypropylene Flame Retardant Compound will continue to grow. It will develop in the direction of high efficiency, low toxicity, and environmental protection, and develop new flame retardants and composite technologies to meet more stringent fire protection standards. In emerging fields, such as new energy vehicle battery protection and aerospace lightweight material fire protection, it is expected to expand its application. At the same time, by compounding with other functional additives, the multifunctionality of polypropylene materials can be realized, the added value of products can be increased, and the sustainable development of the polypropylene industry can be promoted.
Where to Buy Polypropylene Flame Retardant Compound in China?
As a trusted Polypropylene Flame Retardant Compound 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.
As a leading Polypropylene Flame Retardant Compound 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 requirements for the synergistic ratio of components in the preparation of Polypropylene Flame Retardant Compound?
This material is a composite flame retardant material, with homopolymer polypropylene (PP, melt flow rate 12g/10min) as the matrix, and flame retardant (ammonium polyphosphate APP-2), carbon source (pentaerythritol), synergist (melamine) and lubricant (calcium stearate) are mixed in a ratio of 55:25:15:5. When mixing, first put PP into a high-speed mixer (speed 800 rpm), heat it to 100℃, then add flame retardant and additives in turn, and mix for 15 minutes until uniform. Granulate it through a twin-screw extruder (zone 1 170℃, zone 2 185℃, zone 3 200℃, zone 4 190℃), the screw speed is 350 rpm, and cut into 3×3mm cylinders, that is, Polypropylene Flame Retardant Compound. Its density is 0.98g/cm³, melt flow rate is 9g/10min, oxygen index is 30%, and flame retardancy reaches UL94 V-0 level (1.6mm). This process is like mixing food with a spoon. If the proportion of components is improper, the flame retardancy or mechanical properties will be damaged. It needs to be precisely controlled so that the components can work together to provide a one-stop flame retardant solution for PP products.
How to balance the mechanical properties and processability of Polypropylene Flame Retardant Compound?
This product has a tensile strength of 28MPa, an elongation at break of 35%, and a simply supported beam impact strength of 4.5kJ/m², which is about 15% lower than that of pure PP. However, by optimizing the ratio of additives (adding 0.5% maleic anhydride grafted PP), the impact strength is increased to 5.2kJ/m². The melt flow rate is 9g/10min, which is suitable for various processing methods such as injection molding and extrusion. The mold temperature during injection molding is 50℃, the holding pressure is 60MPa, and the product has no shrinkage marks. When used for sheet extrusion, the pulling speed is 2m/min and the sheet flatness error is less than 0.2mm. It has good low-temperature toughness and retains 80% of the impact strength at -20℃, making it suitable for cold regions. Although the amount of flame retardant added is 45%, the surface treatment technology is used to make the dispersed particle size uniformly distributed at 20-30μm, reducing the impact on mechanical properties and achieving a balance between flame retardancy and processing and use performance.
How is the weather resistance and thermal stability of Polypropylene Flame Retardant Compound?
After 1000 hours of QUV aging test (340nm lamp, irradiance 0.71W/m², 8 hours of illumination at 60℃/4 hours of condensation at 50℃ cycle), the tensile strength retention rate is 85%, and the color change ΔE＜3, which is much better than the 60% retention rate of non-flame retardant PP. Thermogravimetric analysis shows that the weight loss rate is only 3% at 300℃ and 50% at 450℃, which is 60℃ higher than the thermal decomposition temperature of pure PP. After being placed in a 120℃ oven for 30 days, the flame retardant performance still reaches V-0 level, and the oxygen index decreases by less than 1%. For outdoor products (such as electric meter boxes), after 1 year of exposure, the surface is not powdered, and the impact strength is retained by 75%. The added antioxidant (1010 and 168 are compounded at 1:2) can inhibit thermal oxidation aging, and carbon black (2%) enhances UV resistance, so it is suitable for multiple indoor and outdoor scenes, with stable and long-lasting performance.
What are the advantages of Polypropylene Flame Retardant Compound in electrical appliance housing?
This product is used for the outer shell of the air conditioner, with a thickness of 2mm, flame retardant up to UL94 V-0 level, and does not ignite in the glow wire test at 750℃, which meets the IEC 60695 standard. After molding, the surface gloss of the shell is 60GU, scratch-resistant (pencil hardness 2H), and there is no discoloration after 500 times of alcohol wiping. In the chemical resistance test, it was exposed to detergent and lubricating oil for 24 hours, without swelling, cracking, and the mass change rate was less than 0.3%. Compared with traditional brominated flame-retardant PP, the smoke density rating (SDR) is 40, and the toxicity index is reduced by 50%, which complies with the EU RoHS directive. Its processing cycle is 10% shorter than that of ordinary flame-retardant PP (injection molding cycle 30 seconds), which is suitable for large-scale production. Therefore, it replaces traditional flame-retardant materials in the field of electrical housing, combining safety, environmental protection and economy.
What are the specifications for storage and secondary processing of Polypropylene Flame Retardant Compound?
This product is packaged in moisture-proof kraft paper bags, 25kg per bag, lined with PE film, and the pallet stacking height does not exceed 10 bags. It is stored in a ventilated warehouse with a temperature of less than 35℃ and a relative humidity of less than 60%. The shelf life is 12 months. It does not need to be dried before secondary processing and can be used directly. If it absorbs moisture (water content > 0.15%), it can be dried at 80℃ for 2 hours. During injection molding, other materials remaining in the barrel need to be cleaned up to prevent contamination from affecting the flame retardant properties. When compounding with glass fiber (10-30%), the processing temperature needs to be increased by 5-10℃ to make the melt fluidity adapt to the addition of glass fiber and enhance the bending strength of the product (up to 80MPa). After crushing, the scraps can be mixed with 20% recycled materials, and the performance reduction does not exceed 5%, which meets the requirements of the circular economy. The processing workshop must be well ventilated to avoid dust accumulation, and the operators must wear dust masks to ensure production safety.
