Flurine® Low Temperature Fluoroelastomer FKM
Flurine® Low Temperature Fluoroelastomer FKM

Item specifics

Low temperature resistance
Shaft seal, O-ring, fuel pipe. Extrusion molding
White or light-yellow flake



Flurine® L series is a low-middle Mooney bisphenol-vulcanized fluoroelastomer with a fluorine content of 66%. 

It is a copolymer of vinylidene fluoride (VF2), hexafluoropropylene (HFP) and perfluoroalkyl vinyl ether (PMVE). 

It is commonly used in automotive, hydraulic, electrical and chemical industries. It has excellent heat and chemical resistance.The outstanding performance is low-temperature elasticity, which are particularly suitable for O-ring seals for fuel injectors.
Technical Specifications
FeaturesLow temperature resistance
UsesShaft seal, O-ring, fuel pipe. Extrusion molding
FormsWhite or light-yellow flake
ItemsTypical ValueTest Method
Physical Properties
Fluorine Content(mass%)6565
Density(g/cc)1.78~1.821.78~1.82ASTM D297
Mooney Viscosity20~4950~8920~4950~89ASTM D1646 ML 1+10 at 121°C
Water content(%)0.150.15ASTM D 5668
Vulcanization Properties
T10(s)<130<160ASTM D5289
T90(s)<240<300ASTM D5289
Mechanical Properties
Tensile strength(MPa)1313ASTM D412 Method A
100% Modulus66ASTM D412 Method A
Elongation at Break(%)180180ASTM D412 Method A
Tearing Strength(KN/m)1515ASTM D624
Hardness, Shore A7575ASTM D2240, Type A
Compression Set1616ASTM D395, Test B 70 hours at 200℃
Thermal Properties
Low temperature retraction, TR10(℃)-19-21GB/T 7758
Brittleness Temperature(℃)-27-34GB/T 15256
Chemical resistance Properties
Resistance to liquidsMethanol,23℃×70h
Tensile strength change rate(%)-10-10ASTM D412 Method A
Elongation at Break change rate(%)-9-9ASTM D412 Method A
100%Elongation change rate(%)-12-12ASTM D412 Method A
Hardness change, Shore A-1-1ASTM D2240, Type A
Volume change rate(%)22
FormulationCuring condition
Polymer 100 MT carbon black,N990 30PressOven
Calcium hydroxide 6 Magnesium oxide 310min at 177°C,0.5°24h at 230°C
Fluorocure-5# 2.5
Process Safety Instructions
1)Store and use all fluoroelastomers only in a well-ventilated area.
2)Do not smoke in areas contaminated with dust from fluoroelastomers.
3)Avoid eye contact. After handling fluoroelastomers wash any skin that came in contact with the product with soap and water.
4)Potential hazards, including evolution of toxic vapors, exist during compounding or processing under high temperatures. 
5)Before processing the fluoroelastomers, read and consult the MSDS, and follow all label directions and operation cautions..
Packaging And Storage
1)Fluoroelastomers be packed in PVC bags in the shape of rubber film, each bag weight 5KGS, and finally be put into a carton. Each carton contains 5 bags with net weight 25KGS.
2)It must be stored in a clean, cool, and dry place. The storage life is one year from the date of production. It must be re-inspected if over one year and only can use if qualified.
3)It is transported as non-dangerous chemicals. Avoid excessive vibration and far away from pollution, sunshine and water during the transport.