Material Specifications   

PTFE Needle Felt

Our general industrial and gasket materials are made from 100% PTFE substrates. The product is sold in both impregnated PTFE felt sheets and non-impregnated form. Our PTFE Felt utilizes a proprietary impregnation process to achieve a one of a kind product, unequaled by expanded PTFE products. The result is a soft material, which conforms to uneven flanges providing durable seals with minimum flange pressures. It has been used in gasketing and wiper applications for many years, particularly in environments involving aromatic fuels, corrosive chemicals, synthetic lubricants, strong solvents and high temperatures and is especially suited for use with all glass, glass-lined and lead-lined equipment.

Industrial PTFE Felt - Medical Felt - Our PTFE felts have exceptional physical properties vs. specification and are produced with "white" fiber which helps ensure cleanliness.

Filtration - Our filtration felts are well suited for critical filter media applications (liquid and air) or as a protective heat barrier. The product is most commonly used to filter fly ash from coal and hog fueled boilers, titanium dioxide, carbon black and miscellaneous invasive chemical processes, is available in CFM ranges from 10 to >100, and can be manufactured in about any width to suit the application up to 76" wide. Our standard PTFE felt product is scrim supported, white in color.

PTFE Felt - Manufacturing Process

Our proprietary manufacturing processes maintain a clean manufacturing environment and dedicated PTFE production line, ensuring only the highest quality products for one of the most exacting industries. These products are commonly used for medical implants / pledgets and buttresses for reconstructive surgery.

Advantages of PTFE Needle Felt

* Resists Sulfuric Acid, red fuming Nitric Acid, Hydrogen Fluoride, Hydrocinnamic Acid, Sodium Hydroxide, aqua regia, and anhydrous ammonia

• Cold Flow Resistance - The interlocking PTFE fibers in the felt base of Armalon XT-8911 provide greater resistance to cold flow than conventional gasketing material made of TFE. The resistance to cold flow of PTFE fibers is a result of orientation during the fiber forming process and is much improved over TFE resins

• Cold Resistance - Armalon XT-8911 was subjected to impact at -320 F(-195 C) (temperature of liquid nitrogen) without cracking or noticeable adverse effects.

• Radiation Resistance - PTFE / resin exhibited no weight loss after receiving a radiation dosage of 3.3 x 107 rads in a vacuum for one hour (equivalent to about 75 years in the Van Allen Belt) and being exposed in a vacuum of 10-7 to 10-8 millimeters of mercury for 770 hours.

• Heat Resistance - There is essentially no change in strength or compressibility of Armalon XT-8911 gaskets after seven days exposure at 550 F (288 C) . Weight loss was only 2.5%.

• Chemical Resistance - The superior chemical resistance of PTFE materials such as Armalon XT-8911 are well documented. After days of exposure to red fuming nitric acid attack, gaskets made of Armalon XT-8911 exhibited essentially no change in compressibility or strength and a weight loss of only 0.7%. Resistance to other chemicals is described in the case histories.

For more information on PTFE Felt please contact a representative or call 708.479.7979.