POLITEF® - PTFE POLITEF (PTFE) was invented in 1938. It is the most preferable and known fluoropolimer among fluorine polymers. It has superior properties that none of the other industrial plastics have because of its strong connection between the carbon and fluor atoms and its molecular structure made of a long and linear carbon chain, which is full with fluor atoms. It has the widest working heat interval among all the industrial plastics (-260°C and +260°C) , complete unlimited resistance against humidity,  against environment conditions and against all the chemical materials used in the industry. It has the lowest static and dynamic friction coefficient among all the known solids, superior electrical isolation, non-adhesiveness, non inflammability and other properties like these. In addition to these, it has sufficient mechanical properties and full resistance against all chemical materials. All these provide POLITEF to be preferred more than the other materials at many usage areas. Moreover many times only POLITEF is being used.  POLITEF, is a material which can be used at many fields because of its above mentioned properties. Medicine, air and space technologies, cable and cable structure groups at computer sector, filter products, systems for determining leakage, valve spare parts, mechanical spare parts, electrical industry, food industry and textile industry are only small examples of POLITEF`s usage areas. PURE POLITEF® PRODUCTS · SHEETS · FULL RODS . EMPTY RODS · FULL WEDGES . EMPTY WEDGES · SKIVED FILMS · POLITEF - TEX(Sanfor Ptfe) · BEARING STRIPS · PISTON RINGS AND FELTS · GASKETS · "O" RINGS · HOSES · CORDS · PACKING BOXES · VALVE MEMBRANES . PUMP DIAPHRAGMS · BELLOWS . ISOLATORS · POLITEF SHEATHING · UTUMAX FILLED-IN POLITEF®-PTFE   The most important properties requested from materials in industry are mechanical and chemical resistance, lightness and low cost. But, nowadays traditional materials are being used and unfortunately all these necessities of technology are not being met. Technology engineers have been investigating since many years to make a new material and a new property by combining the requested properties of two or more materials. Some resistance values of the main material are increased by applying chemical process between the known materials and some components. At macro level, this new material is called “Composite Material", "Filled-in Material", "Alloyed Material"(Composite). ALUMINA, MOLIBDEN SULPHUR, GLASS, BRONZE, STAINLESS STEEL, EPOXI RESIN and CARBON are among the mostly used alloyed materials. Matrix(Main structure) is reinforced by adding fibres or fragments while alloyed material is being produced. Matrix has several jobs like conveying the strength to the reinforcement or carrying the strength or carrying the load with the reinforcement according to the types of the alloyed material.  Alloyed material is generally plastic, metal or ceramics. Generally fibre materials or different kinds of materials like small or big fragments are chosen. The filled-in materials which's mechanical properties develop fastly in technology and which are mostly used are the fibre reinforced ones. Fibres can be continous or discontinous. Materials like glass, carbon, bronze are most commonly used as fibres. In order to increase its resistance against corrosion and against deformation under load, to decrease its thermal expansion and its coefficient, to make it gain properties like thermal and electrical conductivity, dependent on its property of being an alloy material, during polimerization or in the end of polimerization, according to the requests, some materials are added to POLITEF (PTFE). By this way, it is made an alloy. Among the alloyed materials, most commonly used ones are GLASS-FIBRE, CARBON and BRONZE. As a result of Filled-In POLITEF alloys, apart from all of its superior properties, POLITEF, according to its usage areas has gained additional properties as described below; . Electrical Conductivity . Increase At Corrosion Resistance . Increase In Deformation Strength Against Load   . Decrease In Thermal Expansion . High Resistance Against Acids . Easiness At Mechanical Processing . Stretching . Resistance Against Stroke . Increase In Thermal Conductivity FILLED-IN POLITEF® PRODUCTS · FULL RODS . EMPTY RODS · FULL WEDGES . EMPTY WEDGES · SHEETS · BEARING STRIPS · SKIVED FILMS · GASKETS · PACKING BOXES · SEGMENTS AND FELTS  PURE AND FILLED-IN POLITEF® COMPARATIVE TECHNICAL VALUES TABLE PROPERTIES TEST METHOD UNIT PURE POLITEF 15% GLASS- FIBRE POLITEF 25% CARBON POLITEF 50% BRONZE POLITEF SPECIFIC GRAVITY ASTM D 1457/18  gr/cm³ 2,14-2,2  2,1-2,28 2,04-2,28  3,8-4,0  USAGE TEMPERATURE - °C -260/+260  - - - MELTING TEMPERATURE ISO 3146 °C 325-330  - - - BRITTLENESS TEMPERATURE - °C -200  - - - PULLING STRENGTH ASTM D- 1708 kg/cm²  250-300 220-240  165-170 170-175 ELONGATION UPON BREAKING ASTM D- 1708  %  250-300 290-300  155-165  170-180 RESISTANCE TO STROKE ASTM D- 256  cm.kg/cm  15,5 14  8,5  11,0 SHORE D HARD ASTM D- 2240  -  53-57 57-62  60-67  63-70 DEFORMITY UNDER LOAD 230°C, 1day, 140kg/cm² ASTM D- 621  %  9,5-11 9,8  5-6  5-5,5           D-ELECTRIC RESISTANCE ASTM D- 149  KV/mm  50-80 16-19  13-19  ** THERMAL CONDUCTIVITY ASTM C- 177 Kcal/cm.°C.hour   0,035 0,048  0,085  0,083 THERMAL EXPANSION ASTM E 831 10-5/°C  12-14 10-14  8-11  8-9 INFLAMMABILITY TEMPERATURE ASTM D- 1929  °C  530 630  630  640 ** Too high to be measured