PTFE Teflon

PTFE (white)

It is a semi-crystal high-performance thermoplastic as well as one of the most thermal stable plastic (it withstands temperature from -200 to +260°C). It possesses very good resistance to almost all known elements, chemical compounds as well as dissolvents. Its perfect electric insulating power and the lowest dielectric coefficient among all plastics are essential features for uses in electrical engineering, especially in high frequency techniques. PTFE is characterized by high density (about 2,2 g/cm3). There is a possibility of preparing PTFE with addition of graphite (or carbon), glass fibres, bronze or metal powder.
The various tinges received as result of combination PTFE with bronze do not change its good properties. Because of this, the use of non-corrosive steels can be avoided. Teflon covers various fields of application in chemical apparatus building, transportation engineering, machine construction, production of armature pumps, electrical engineering, water supply systems, cryotechnique, filters and medical technoelectronics.

Properties:

• very high impact strength also in low temperatures,
• superb sliding properties and abrasiveness,
• practically the lack of slick-slip motion,
• the high temperature of continuous use (+260°C),
• very good chemical resistance to almost all chemical factors,
• resistant to hydrolysis and hot steam,
• very good UV radiation resistance,
• high thermal resistance (practically infusible, self-extinguishing according to UL 94),
• depending on the type, electrically insulating or antistatic,
• physiologically harmless - tasteless, odourless, non-toxic, resistant to micro organisms and funguses.

Chemical resistance

PTFE is the most resistant material to non-organic and inorganic chemicals. It can be used for indoor and outdoor applications and be exposed to UV radiation, which does not caused changes in its physical properties. Additionally, it helps to reduce frequency of conservation. At the same time, it reduces the uses of non-corrosive steels.

Sliding properties

PTFE with polyethylene PE 2000 possess the lowest sliding coefficient among all plastics. A very low adhesiveness and friction coefficients are also typical for these materials. Due to static and dynamic friction coefficient the stick-slip effect does not occur while using PTFE. These properties reduce necessary driving force, which allows reducing energy consumption. PTFE is recommended for all kinds of seals, sliding bears and slats, valve seats as well as rotors of pumps.

Impact strength

PTFE can be used in high impact load applications without additional protective constructions even in low temperatures. Its usage also reduces noise and suppress impacts.

Temperature of continuous use

Teflon withstands temperatures from -200°C do +260°C. This hard inflammable material increases the safety of devices in high temperatures. PTFE without any strengthening is preferred in high-temperature applications due to its sliding properties, low grinability and electric parameters.

Contact with food

PTFE is admitted to direct contact with food (EU and FDA guidelines) and its physiologically harmless. Its type with addition of bronze or carbon is not , however they are physiologically harmless.

Wear resistance

Due to addition of 25% of carbon or 60% of bronze, hardness, compression strength, wear resistance are improved.
PTFE + bronze is an antistatic plastic recommended for press runners with transfer speed from over 1 m/s, when the use of black antistatic PE 1000 is impossible.
PTFE + bronze is antistatic. It shows low thermal expansion coefficient as well as good thermal conductivity. Thanks to this, it is suitable for reservoir leanings, pipelines and casing of filters.

Colour

PTFE is available in white colour. PTFE + bronze is supplied in brown colour and with carbon in black.