MANUFACTURING OF PTFE PRODUCTS

manufacturing of PTFE products

Industrial gaskets, custom technical articles, semi-finished products, valve seats and insert rings

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.

INTRODUCING PTFE

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].

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.

PTFE TYPES

Shown below are the most common PTFE trade names available at LIMA

LIMA CODE VARIANT
LM200 VIRGIN PTFE
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
LM217 ADDITIVATED PTFE
LM410 PTFE LIGHT GREEN
LM411 PTFE DARK GREEN
LM196 PTFE CONDUCTIVE
LM198 PTFE PIGMENTED
LM419 PTFE ANTISTATIC
LM447 PTFE CEMENTED
LM442 PTFE FOR THREAD SEALING
LM418 TFM 1600
LM414 TFM 1700
LM420 TFM 1705
LM421 TFM 4105
LM230 TFM 6221
LM423 TFR 1502
LM454 TF 4215

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.

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