TF-251 0.42g/cm3 APP Intumescent Flame Retardant

Place of Origin CHINA
Brand Name Taifeng
Certification ISO9001, REACH, SGS
Model Number TF-251
Minimum Order Quantity 25KGS
Packaging Details 25kg/bag, 24mt/20'fcl without pallets, 20mt/20'fcl with pallets
Delivery Time 10-15days
Payment Terms D/P, T/T, L/C
Supply Ability 200mt/month

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Product Details
Phosphorus 18%~22% Nitrogen About 23%
Density 0.42g/cm3 TGA >240℃
Halogen Free Smoke Low
Type Compound Type Single Use Ok
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APP Intumescent Flame Retardant


0.42g/cm3 Intumescent Flame Retardant


TF-251 Intumescent Flame Retardant

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Product Description

Intumescent Flame Retardant Based On Phosphorus For Polypropylene PP Polyethylene PE With UL94 V-0
TF-251 is developed for polyolefin and thermoplastic elastomer, especially for polyethylene. With adding 23%~25%, the PE product will achieve UL94-V0. TF-251 is P-N synergies. TF-251 contains acid, gas and carbon sources for carbonizing, the expansion mechanism plays a flame-retardant role. TF-251 flame retardant polyolefin, glass fiber reinforced polyolefin, flame retardant can reach UL94 V-0(1.5mm), simultaneously passed GWIT 750℃ and GWFI 960℃ glow-wire test, and not approved by the EU and its Council Restrictions on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Directive 2002/95/EC.Flame retardant products also have low density, hair Low smoke  Content. The flame retardant does not contain ammonium polyphosphate, which is used in polyolefin High thermal stability, excellent dispersion, and high - efficiency flame - retardant performance.
TF-251  has a low dust emission so that operators are no longer troubled by dust. Compared with expansive flame retardants in the APP system,
TF-251 has a stronger flame retardant capability.

1. TF-251 has advantages of halogen-free, low smoke, low toxicity, and environmental protection;
2. The extrusion processing temperature of TF-251 is high, and there is no water slip;
3. The low addition amount of PreniphorTM EPFR-110DL, stable color, low density and excellent mechanical properties of flame retardant products;
4. TF-251 has high phosphorus content and excellent solid-phase flame retardancy, which is conducive to flame retardancy of polyolefin products;
5. The dust amount of TF-251 is small when used, which is conducive to improving the working environment of operators.
Technology datasheet:

Index TF-251
N% ≥23
P% ≥19
Moisture content% ≤0.2
Whiteness(R457) ≥90.0
Bulk density(g/cm3) About 0.42
TGA (onset) ≥240℃
Particle size (D50)

About 15µm


Proposed dosage:

material homo-polypropylene co-polypropylene PE TPV
TF-251% 19-21 22-25 23-25 45-50
UL-94 V-0 V-0 V-0 V-0

Applications of TF-251:
1,reference formulations:

components A B C D
homo-polypropylene(T30S) 80.3      
co-polypropylene(2500H)   74.6    
co-polypropylene(K8003)     76.6  
PE       74.6
TF-251 19.5 25 23 25
Antioxidant 1010 0.1 0.1 0.1 0.1
Antioxidant 168 0.1 0.1 0.1 0.1
EBS 0.2 0.2 0.2 0.2

2,Processing Technique
Processing equipment:Twin-screw Extruder 25
Temperature(℃):160 180 190 190 190 180
3,Main performance




Flame retardant property 1.6mm V-0 V-0 V-0 V-0
3.2mm V-0 V-0 V-0 V-0
4,Notes for processing:
1 . The thermal decomposition temperature of TF-251 in nitrogen is 280℃. Therefore, the processing temperature of the twin-screw can be determined according to the specific situation. The condition is raised to strengthen dispersion and improve plasticization. Several layers of screens can be added during extrusion. In the twin-screw extrusion process. A certain degree of vacuum must be maintained.
2 . Substances in the system that have adverse effects on flame retardancy: chlorine-containing pigments such as phthalocyanine green will cause flame retardancy failure. The use of carbon black reduces flame retardancy, The amount of flame retardant should be increased appropriately.
3 . TF-251 is acidic, please use the processing machine with acid resistance.
TF-251 0.42g/cm3 APP Intumescent Flame Retardant 0
HDPE Plastic Bottles High-Density Polyethylene