PTFE Machining

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PTFE Material or Teflon®, is Polytetrafluoroethylene which is a synthetic fluoropolymer of tetrafluoroethylene. Within Industry PTFE is well known and widely used, in numerous applications.PTFE Machining –BE-CU teflon cnc machining shop Bespoke PTFE Machined Parts to customer specifications, samples or drawings. Our Plastic CNC Machine shop specifically caters for Industrial Engineering Plastic Materials, such as PTFE.

BE-CU.COM is China’s leading professional polytetrafluoroethylene (PTFE) and ultra-high polymer (UPMWPE) CNC processing manufacturer.

We not only have advanced production equipment, but also have professional technical engineers to provide a full range of technical support and services. Our products have successfully entered the international market and are exported to more than 40 countries such as the United States, South Korea, India, the Philippines, Russia, Saudi Arabia, Indonesia, etc. nation.

PTFE has a high melting point and a large melt viscosity, and is sensitive to shearing in an amorphous state, which is prone to melt fracture. Therefore, conventional thermoplastic molding processes such as melt extrusion and injection molding cannot be used, and only similar powders can be used. Metallurgical method for sintering. The manufacture of filled PTFE is the same as the molding of PTFE. It can be processed by pre-forming, free sintering, or by plunger extrusion. The above machining technology is generally suitable for products with fixed wall thickness, but not suitable for PTFE film. In recent years, a lot of research has been carried out in China, and the more mature machining technologies are:

For the dispersive machining teflon resin, carry out the calendering process; take advantage of the low cohesion and fibrillation properties of this resin, add the PTFE aqueous emulsion to the powder system, stir for a certain period of time, the PTFE fibrils are entangled in the powder, and then Compression to make the powder into a solid, and calendering the solid to obtain a PTFE filled and modified film.

Using the characteristics of low hardness and good toughness of machining PTFE sintered products, metal turning is carried out. The thickness of the PTFE film processed by turning can reach about 0.04mm. This film has good mechanical properties, does not add any substances during machining, has low impurity content and is non-toxic, and can be used in the optical field.

In addition, there is a conventional extrusion method and a calendering method for extrusion machining, and the resin is directly processed with raw materials without melting and plasticizing. This method utilizes the residual deformation characteristics of PTFE under the action of compressive force, and the residual deformation can also be increased by adding human-fixing aids. Usually, the PTFE material with the addition of extrusion aids is pressed into a certain density. , Put it in the extruder and heat it properly, after extruding thin strips, it is finally sent to the calendering roller to be calendered into a film.

In addition to the one-time machining technology introduced above, PTFE machining also has some newly developed secondary machining technologies worthy of attention, such as PTFE vacuum forming technology, hot press forming and hot blow molding technology, isobaric forming machining technology, etc.

PTFE is the preferred material for corrosion-resistant lining of corrosion-resistant pipes, fittings, bellows, pump bodies, valves, kettles, tanks, towers and various standard equipment; as a sealing material, it is widely used in machinery, petrochemical, transportation, textile and construction industries. Wide range; PTFE can also be used as valves, bearings, piston rings, guide rails and other parts that require corrosion resistance and bottom friction; according to PTFE film treatment, it has selective air permeability and can be used as separation material, selectively permeating gas or liquid, especially filtering Corrosive liquids; PTFE membranes developed abroad in recent years are used as artificial organs, such as artificial blood vessels, heart valves, etc. Moreover, many new application technologies and fields have been continuously developed, and PTFE plastic machining and its modified materials have shown a good development prospect. According to the current research, production and application status at home and abroad, my country should vigorously develop modified PTFE materials to make them commercialized, serialized and high-performance, and it is especially important to give priority to the development of glass fiber, carbon fiber, and graphite with large demand and good fluidity. ,

copper powder filled PTFE, make full use of my country’s rare earth resources, and develop new varieties of rare earth filled PTFE and nano-modified PTFE will be the key research direction in my country in the future