MANUFACTURING OF PTFE PRODUCTS
Our range of PTFE products includes seals, bushings, wheels, bellows, mechanical parts for the handling and support, nozzles, spray guns components, o-rings, screens, panels, covers and coatings for metal parts.
Thanks to its unique combination of peculiar characteristics, PTFE is one of the most common and widely used plastics. PTFE is available both in virgin version as well as loaded with substances such as glass, ceramic, carbon graphite, steel, mineral salts, graphite, carbon fiber, molybdenum sulphide and bronze. PTFE is particularly popular in the food, medical, pharmaceutical, petrochemical, electrical and painting fields.
The polytetrafluoroethylene (PTFE) is a fluorinated polymer, or a polymer in which the chain of carbon atoms of the hydrogen atoms are replaced by fluorine atoms, thus ensuring high chemical resistance even at high temperatures. PTFE is one of the most requested and used thermoplastics. To improve their characteristics can be added bronze, glass, graphite, carbon graphite, steel, mineral salts, carbon fiber and other additives. The basic structure of PTFE is of the type [CF2 – CF2].
CHARACTERISTICS AND APPLICATION FIELDS
Due to the high viscosity of the mass (melting point > 327 ° C) PTFE can not be worked with common processes for thermoplastic materials. At 19 ° C, PTFE undergoes a phase transformation with a volume increase of 1,2%, of which account must be taken both in the dimensioning of the molded parts is in by chip removal machining (preferably at 23 ° C). PTFE can be treated by the free sintering, pressure sintering or extrusion. The processes for metal removal require the use of sharp tools.
PTFE is a little stiff and solid material. Its main advantage lies in the vast field of application temperatures (from -270 ° C to 300 ° C): the PTFE tends to become brittle only below -260 ° C. And ‘chemically stable, it is insoluble in all solvents known to temperatures below 300 ° C, resistant to weathering, has low flammability, has excellent electrical and dielectric characteristics and has an excellent anti-adhesive and sliding behavior. The wear resistance, as well as the rigidity and solidity, is not good, but it can be improved with the addition of graphite, coal, steel, glass, bronze, and molybdenum sulfide.
The PTFE can be used for the realization of gaskets subject to static and dynamic stresses, bellows, pistons, mechanical parts for machinery, coatings and liners. PTFE is particularly suitable for applications in the food, chemical, medical, electrical and pharmaceutical industries.
Shown below are the most common PTFE trade names available at LIMA
|LM100||VIRGIN PTFE NORSOK COMPLIANT|
|LM413||MODIFIED VIRGIN PTFE|
|LM422||VIRGIN PTFE RED PIGMENTED|
|LM201||PTFE + BRONZE|
|LM209||PTFE + 40% BRONZE|
|LM209-F||PTFE + 40% BRONZE + PIGMENTS|
|LM219||PTFE + 40% BRONZE ISOSTATIC|
|LM220||PTFE + 40% BRONZE BLUE|
|LM221||PTFE + 40% BRONZO + Green molybdenum disulfide|
|LM208||PTFE + 60% BRONZE|
|LM202||PTFE + 25% GRAPHITE|
|LM102||PTFE + 25% CARBOGRAPHITE – NORSOK COMPLIANT|
|LM222||PTFE + 33% CARBOGRAPHITE|
|LM213||PTFE + 35% CARBOGRAPHITE|
|LM416||PTFE + 25% MODIFIED CARBON|
|LM223||PTFE + 15% SOFT COAL|
|LM207||PTFE + 25% SOFT COAL|
|LM212||PTFE + 25% HARD COAL|
|LM412||PTFE + CARBON + PEEK|
|LM205||PTFE + 15% GLASS FIBER|
|LM204||PTFE + 15% GLASS FIBER + BISULPHIDE MOLYBDENUM|
|LM218||PTFE + 20% GLASS FIBER|
|LM203||PTFE + 25% GLASS FIBER|
|LM103||PTFE + 25% GLASS FIBER – NORSOK COMPLIANT|
|LM453||PTFE + 25% GLASS FIBER + PIGMENTS|
|LM226||PTFE + 30% GLASS FIBER|
|LM214||PTFE + 40% GLASS FIBER|
|LM448||PTFE + GREEN GLASS FIBER|
|LM415||MODIFIED PTFE + GLASS FIBER|
|LM215||PTFE + GRAPHITE GLASS|
|LM206||PTFE + 15% GRAPHITE|
|LM225||PTFE + 20% GRAPHITE|
|LM228||PTFE + 25% GRAPHITE|
|LM224||PTFE + 35% GRAPHITE|
|LM216||PTFE + 50% INOX|
|LM451||PTFE + 15% PEEK|
|LM444||PTFE + 20% CALCIUM FLUORIDE|
|LM445||PTFE + 10% POLYESTER RESIN|
|LM210||PTFE + 3% MoS|
|LM443||PTFE + CARBON FIBER|
|LM211||PTFE + MINERAL SALTS|
|LM410||PTFE LIGHT GREEN|
|LM411||PTFE DARK GREEN|
|LM442||PTFE FOR THREAD SEALING|
PTFE – TRADE NAMES
Shown below are the most common trade names for the PTFE material.
Please remember that LIMA can provide both generic materials and materials covered by trademark (ie that show the TM or ® endorsements), based on the requirements of the customer. If the customer wishes to details made of plastic material covered by trademark, LIMA will stock up directly by the holding company of the said trademark.