What is filled PTFE?
Carbon Filled PTFE was developed to provide a PTFE based material with improved mechanical strength. PTFE on its own has excellent frictional properties, elasticity and wear resistance but relatively poor mechanical strength and tends to fail in high PV applications.
Is PTFE a graphite?
Graphite packings and PTFE Packings are popular sealants generally available in braided style. The biggest difference between both these packings is that graphite is a naturally occurring form of carbon and PTFE is a synthetic material.
Are there different grades of PTFE?
PTFE is available in many different Grades as Virgin PTFE, Chemically Modified PTFE, Carbon Filled PTFE, Glass Filed PTFE, Carbon / Coke Filled PTFE, Graphite Filled PTFE, Bronze Filled PTFE, Bronze + Molybdenum Disulphide Filled PTFE, Aluminum Oxide Filled PTFE, Calcium Fluoride Filled PTFE, Stainless Steel Filled …
What is PTFE carbon?
PTFE carbon contains of 75% PTFE virgin and 25% carbon fillers. It is available in black colour with a hardness of 67 shore D. The carbon fillers improve the creep resistance, hardness and thermal conductivity of the PTFE. This material offers excellent wear properties and is particularly suitable for the use in water.
Is PTFE and Teflon the same?
The simple answer is that they are the same thing: Teflon™ is a brand name for PTFE and is a trademark brand name used by the Du Pont company and its subsidiary companies (Kinetic which first registered the trademark & Chemours which currently owns it).
What is reinforced PTFE?
PTFE is reinforced with glass fibers, the percentage varying between 5 and 40%. The added glass fiber improves the wear properties and, to a minor degree, also the deformation strength under load while leaving substantially unchanged the electrical and chemical characteristics.
What is PTFE graphite?
PTFE graphite with a hardness of 60 shore D compounds of 15% graphite and 85% PTFE virgin and is available in dark grey colour. PTFE graphite has one of the lowest coefficient of friction and an improved conductivity. The wear properties are particularly excellent in operation with soft metals.
What is mechanical grade PTFE?
Mechanical PTFE is made with reprocessed PTFE resin. Mechanical PTFE can be filled with various materials to improve its properties. Depending on the filler used, filled PTFE can have enhanced deformation, wear, compressive, thermal, and electrical properties.
What is the difference between PTFE and virgin PTFE?
What is the difference between virgin and mechanical (reprocessed) PTFE? Virgin PTFE has better physical properties than mechanical PTFE, but both are 100% PTFE. Mechanical grades feature varying percentages of reprocessed material and can be more economical in less demanding applications.
What is TFM material?
TFM is a chemically modified PTFE that fills the gap between conventional PTFE and melt-processable PFA. According to ASTM D 4894 and ISO Draft WDT 539-1.5, TFM is classified as a PTFE.
What is virgin Teflon?
Virgin PTFE is made from pure PTFE resin with no added recycled material. Virgin PTFE is extremely chemical resistant, serves as an electrical insulator, and retains flexibility in low temperatures. Virgin PTFE is FDA approved and is often used in food and beverage, pharmaceutical, and cosmetic applications.
Which is the best material to use for PTFE?
Milled glass fibers have the least effect on chemical and electrical properties and add greatly to the mechanical properties of unfilled PTFE. Addition of glass improves compressive properties by as much as 40% and improves wear resistance greatly. These compounds resist acids and oxidation but can be attacked by alkali.
Which is better for water filler graphite or carbon?
Graphite has good chemical resistance to corrosive environments and exhibits good initial wear and rubbing/sliding characteristics in dry and water applications. Commonly blended with carbon and PTFE. This filler has better wear, creep resistance, and higher thermal conductivity than glass fiber with PTFE.
Which is better, PTFE or carbon filler?
Commonly blended with carbon and PTFE. This filler has better wear, creep resistance, and higher thermal conductivity than glass fiber with PTFE. The compound is easily machined, but has poor chemical resistance in the presence of acids and alkali.
