Fluortubing specializes in making thin wall tubing from PTFE Fine Powder. Over 90 % of the materials used are modified PTFE, according to ASTM D4895-91a,type I, grade 9,class B. These materials are known for their relatively low permeation rates, high flexibility and flex life, and clarity .They can be welded with PFA.
Fluortubing uses 100 % Primarily Chemours™ (Former Dupont™ ) materials, unless specified otherwise by customers. Typical grades used are : Teflon™ 62N X, Teflon™ 62XT N, Teflon™ CFP6000 X, Teflon™ 669 X. All grades used are produced without the use of PFOA. Fluortubing uses a catalytic afterburner to burn harmful vapors.
Making the Tube
PTFE tubing or tubing of Teflon™ is extruded in a typical way that is unique for the plastics industry. The PTFE particles are coagulated in an aqueous solution to become a fine powder that is capable of absorbing a liquid lubricant. After mixing the powder with a lubricant, the material is compacted and pressed through a die and pin. The product now is in so-called green state. This product is dried and sintered in ovens.
Vapors from the lubricant are extracted. When the tubing exits the ovens, it has its strength and integrity we know. Tubing in green state is very vulnerable. That is why Fluortubing only dries and sinters in vertical ovens, that are right downstream on the extruders, thus making sure that the green tubing is untouched until it is dried and completely sintered.
Finishing the tube
Once the PTFE Tube has been extruded and sintered, it will keep its original shape, even at melt temperature. To re-shape a PTFE tube it will usually be heated to its melt temperature and forced into the desired shape. Then it is kept in this shape until the tube has cooled to room temperature. This process enables the production of convoluted tubing, cuffs, flares, bent shapes, blow molded products and a variety of other shapes.
PTFE tubing can also be machined to size by drilling, cutting, milling and other conventional technologies. Modified types, like Primarily Chemours™ (Former Dupont™) T 62 Resins ,can be welded both by PFA wire and by pressure welding. Fluortubing offers all these technologies in one hand.