Teflon - FEP, PFA, PTFE - The Chemours Company

Kunststoffe international, 2005-11-21, Bonding of Plastics
...on must be borne in mind when these materials are diffusion bonded. For those thermoplastics which cannot be diffusion bonded, such as PE and PP, corona (Fig. 3) and low-pressure-plasma priming can only be followed application of two-pack adhesives. Teflon&g;Ò requires the use of special primers and even then has limited bonding capability. In contrast, polyamides and polyesters lend themselves readily to bonding with epoxides, polyurethanes and hotmelts after appropriate priming. This also appl...

Kunststoffe international, 2005-11-21, Development History of Plastics: Growth through Changing Times
...isation of PVC commenced at Bitterfeld/Germany. Roy. J. Plunkett (USA) at DuPont discovered – again somewhat by chance – the first fluoroplastic, polytetrafluoroethylene (Teflon). The outbreak of the Second World War in 1939 marked the start of a dark chapter in German history. During the war years up to 1945, there were reports, especially from the UK, of new plastics being discovered as well as new uses and production start-ups for familiar plastics. In 1939, ICI started production of low-den...

Kunststoffe international, 2005-11-21, Economical in Long Series
...good surface quality so that sufficiently good surfaces are attainable also without finishing. - For bearings made of fibre reinforced plastic there is the possibility of centrifuging special tribological layers. Such a layer can be provided with teflon or molybdenum sulfide particles, for instance, in order to produce a low coefficient of friction. Conclusion Only a relatively low impregnation pressure can be achieved using the TEP centrifugation process in a speed range that is still realisa...

Kunststoffe international, 2005-11-21, Fibre Reinforced Plastics: Tailor-made Reinforcing Textiles
...crease up to the second peak. After the second peak, the peel strength undergoes non-linear fall. The first peak takes in the development of cracks between the laminate planes. Up to this point, crack initiation was made possible by an inserted Teflon film. The second peak determines the maximum resistance of the FRP specimen to crack growth and, following this, the crack spreads further between the laminate layers. The sewing-thread material has a key influence on crack inhibition. The maximum ...

Kunststoffe international, 2005-11-21, High-performance Elastomers: From Abrasion Resistant to Self-healing
... film made from PA 12 elastomers benefits from the fact that it exhibits less hysteresis than competition materials and thus makes smaller bending radii possible. The latest developments are to be found in the dirt repellency of surfaces. Teflon-modified moulding compounds have already demonstrated their suitability in this respect in contact with coatings, resins and mud. The Authors Michael Beyer, born in 1958, is in Technical Marketing of the High Performance Polymers Business Unit of Deguss...

Kunststoffe international, 2005-11-21, Joining, Texturing, Modifying: Selecting the Right Laser
Special Selecting the Right Laser Joining, Texturing, Modifying. While the use of laser technology was often limited to expensive products in the past, inexpensive diode lasers and more compact Nd:YAG lasers are finding an ever-wider field of application in the plastics industry. For every specific application, the question always arises as to what is the right laser beam. Arnold Gillner Applications within the field of plastics range from products for packaging, electronics, household appli...

Kunststoffe international, 2005-11-21, Laser Technology: A Flexible Tool for Structuring, Marking and Joining
Special A Flexible Tool for Structuring, Marking and Joining Laser Technology. Lasers have long been an established component of innovative production solutions in manufacturing technology. In plastics processing, marking can be regarded as the biggest market segment. Welding has crossed the threshold to industrial application. Arnold Gillner Ulrich Russek While laser welding of metals is established for many products in electronics, the household appliances industry and automotive technology, ...

Kunststoffe international, 2005-11-21, Laser Welding: Laser-adapted Construction for Plastic Welding
...force, compression density, effect on the surface etc., but also on the quality and/or supplier of the polymer material. Nowadays, a number of plastics manufacturers specifically offer laser-optimised materials. In extreme cases, combinations of Teflon film can be produced with some plastics or plastics with metals, although, according to the textbook, this would not strictly be regarded as welding. In practice, however, it often fulfils the purpose. Selection of Pigments/Dyes Laser welding is...

Kunststoffe international, 2005-11-21, Lotus-Effect – Now and in the Future
... much quoted lotus-effect. Since the mid-1990s, a number of companies have been working on the industrial exploitation of this effect. But what products are actually available now? And what products can we expect in future? In most cases, “the Teflon frying pan” is the spontaneous answer that people give when asked what achievement from the early days of space flight – and the billions of dollars spent on it – benefits our lives today. Apart from the fact that this answer is wrong (after the d...

Kunststoffe international, 2005-11-21, Medical Technology: High-precision Lightweight Design
...ntegration in the orbital arc, a T-shaped recess for the brake lever, the grooves for the segments of plastic conduit and the geometry for the future dovetail guide are formed in the PU core. Segments of plastic conduit with the ends sealed by Teflon plugs (to prevent filling with resin during the injection process) are then placed in the grooves. After injection and the subsequent curing of the orbital arc, the plugs can be drilled out and the Bowden cables inserted into the conduit. With the ...

Kunststoffe international, 2005-11-21, Mould Technology: Blown Films with Improved Properties
...ad to deviations in film thickness of up to ±20%. Such a film can only be wound if the head rotates. However, the rotation creates new problems. Since the bearing is heated up to 200°C, the lubricant melts and must be continually replaced. Teflon bearings can remedy this. Also, the power supply to the heaters and the data transmission needed for the machine control must be implemented with slip rings. Network Structure Produced by Rotation In the newly developed rotating mandrel head, the abov...

Kunststoffe international, 2005-11-21, Roof Systems: A Concept Suitably-tailored to Plastics
...ctor moves up along the front edge of the roof cut-out as the roof is opening. This is made of a polyester fabric (PES). The developers also use this same material for the sun blind, which additionally serves as a wind deflector and is guided by Teflon strips along its sides. Those who value fresh air in the cockpit but do not wish to expose themselves to the sun's rays can easily move the blind into any desired position. The tightly tensioned plastic fabric does not flap around even when th...

Kunststoffe international, 2005-11-21, Surface Pretreatment
...onent, modifications or facelifting have no effect on the fluorination process, which is independent of geometry. Fluorination has a much wider technological window than other pretreatment methods. Fluorination only has limitations with fluorine- or Teflon-containing plastics. Otherwise, it is able to achieve a lasting improvement in adhesion to virtually all plastics surfaces. The gas-phase fluorination process was developed by Fluor Technik System GmbH, Lauterbach. The company designs, produce...

Kunststoffe international, 2005-11-21, Tools: A Better Grip
...oof and scratch-resistant. A different family of TPVs forms a chemical bond with textiles, metals and other materials. These thermoplastic vulcanisates adhere to aluminium, brass, copper and steel, as well as to etched fluoropolymers such as Teflon. They offer maximum flexibility, and bending and abrasion resistance, as well as a high level of chemical and corrosion resistance, plus a low specific gravity. Typical applications for these TPVs include hoses, coated textiles, bonding layers for mul...

Kunststoffe international, 2006-01-26, Processing: Continuous Process for Manufacturing Natural-fibre-filled Plastic Boards
...vailable, which can produce panels with a final width of 210cm. Shaping in the Double-belt Press In the pFix (manufacturer: Schilling-Knobel) double belt press specially designed for this technology, two heat-resistant plastic belts made of Teflon-coated glass fabric are arranged horizontally one above the other, with their reverse sides supported by heating and cooling panels (Fig.5). While the lower panels are rigid, the upper panels can move vertically together with the entire upper belt to...

Kunststoffe international, 2006-01-26, Structuring and Ablating: Manufacturing Medical Products with Laser Technology
...currence of any thermal degradation. Figure 2 shows a microchannel structure scribed in polycarbonate in this manner. Structuring of Polytetrafluoroethylene. Fluorinated aliphatic materials such as polytetrafluoroethylene (PTFE) (grade: Teflon; manufacturer: DuPont) are difficult to structure by means of laser radiation. Because absorption is relatively weak, even in the deep UV range, radiation in the vacuum UV range (wavelength

Kunststoffe international, 2007-05-14, Big Opportunity for the Plastics Industry
...VB intermediate layers give high post-breaking strength to glass/glass panels, and thus enable the architect to adhere to the strictest international safety standards for laminated glass. Frontsheets of Fluoropolymers Frequently, Teflon films are used as frontsheets for flexible solar panels. As against glass, their refractive index is low, which means that they are more translucent. This steps up the photovoltaic plant’s degree of efficiency. Moreover, fluoropolymer is a light material: a fro...

Kunststoffe international, 2008-02-17, As Good as Welded
...iefly by absorption of laser radiation to a temperature above the flow point of the plastic employed. Possible choices for the heat resistant material are essentially metals and ceramics, but they could also include heat resistant plastics such as Teflon. If plastics that are not transparent to laser radiation are to be used the process can be adapted in such a way that the radiation does not pass through the plastic but rather is aimed directly at the side of the metal component (Fig. 7). The m...

Kunststoffe international, 2008-07-15, Saint Augustin Displays Greatness
...bination of CFK rolls and wood-pearl bars. The pearl bars can be extended as necessary, so that when processing especially stiff PA grades controlled friction can be applied to the film. Lastly, the turning bars of the hauloff can be supplied with a Teflon coating to prevent sticking of certain products. Two center/gap/contact winders for up to 1,200 mm thick rolls featuring automatic winder shaft handling for roll removal are included. The entire flexible system is controlled by the Kuhne Extru...

Kunststoffe international, 2009-02-17, Good Not Only for Teeth
...rents, release active materials in a specified manner, undergo reactions with parts of the body – and at the same time still be easy to process. Fluoropolymers satisfy many of these requirements and can serve as much more than the well-known Teflon coatings that optimize the non-stick characteristics of kitchenware. PTFE Is always the Starting Material Polytetrafluoroethylene (PTFE) is the starting material for many other fluoropolymers hiding behind the wellknown brand names Teflon (supplier: D...

Kunststoffe international, 2009-06-16, Throwing Light on Electronics Encapsulation
...e one hand, and, on the other hand, integrated into the module which is stiffened by the inserted parts. For the polymer in the first case to shrink unhindered and stress-free, either it must be prevented from adhering to the mold (e. g. by Teflon coating), or the mold has to be made from a pliable material, in our case silicone (Fig. 4), with which first prototypes can be built up by vacuum ing. When the fiber is embedded in the actual mechatronic module, the coupling of polymer onto the insert...

Kunststoffe international, 2010-08-19, Vital Contacts
...Grivory HT1V FWA grades at 325 °C means that this product family is suitable for frying spatulas with very high temperature requirements. Polymers are preferred for frying spatulas and other kitchen utensils as metal ones can easily scratch Teflon coated frying pans. Tests carried out by the environmental consumer magazine Ökotest have shown that temperatures of 270°C can easily occur in frying pans. Areas of the pan coated with oil were found to be hotter than unwetted ones. Amongst the twenty ...

Kunststoffe international, 2010-09-24, The Dies Are Rolling
...rooms, and can cope with high mold temperatures. A solution has now been made available by Strack Norma GmbH, Lüdenscheid, Germany. It is a new type of bush, with impressed rounds on a teflon basis, and with integrated minimum lubrication (Fig. 9). Hall 1, booth F09 Ewikon The Benefits of Side Gating With its HPS III-MH series, Ewikon Heißkanalsysteme GmbH, Frankenberg, Germany, has on offer a variable multiple nozzle concept. It is suited for side gating of moldings, as well as for compact need...

Kunststoffe international, 2011-10-17, Compression Molding Reproducible Parts
...f the prepreg thickness. According to the company, this permits uniform heating right through to the center of the material without exposing the outer layers to excessively high thermal stressing, contrary to the case for infrared radiant heaters. Teflon film, which is stretched over the heating platens by means of a special unit, prevents the prepreg from sticking. A pneumatically-driven linear system with a U-shaped transport frame transports the material from the pre-heating station to the co...

Kunststoffe international, 2012-10-15, Combining Polymerization and Molding within a Single Machine
... linear robot equipped with needle grippers. The first fabric layer is laid directly onto a heated core, but the following fabric layers are sprayed with a binder before being laid up. Needles fix the glass fabric on the core before teflon rollers spread it out to the sides (Fig. 5) after which the contour is thermally fixed through the evaporation of the solvent. An Engel easix six axis industrial robot (Fig. 6) which is fully integrated into the CC200 control system of the injection molding ma...

Kunststoffe international, 2013-05-16, Hidden in Plain View
...ere water vapor permeability plays an important role. A jacket should protect against wind and rain, but moisture due to perspiration should be able escape. Gore-Tex developed a process where a film made from fluorinated polyethylene (Teflon) is stretched in such a way that it becomes porous. It is only due to its low thickness that the membrane is flexible and yet not elastic. There is however an area where alongside water vapor permeability the tear strength and weldability of TPU is significa...

Kunststoffe international, 2014-01-23, Fluorinated Oils: Going Smoothly
...rt. Their main component is perfluoropolyether (PFPE; trade name: Krytox, manufacturer: DuPont), the chemical structure and properties of which are very similar to those of polytetrafluoroethylene (PTFE). This is why they are often named “liquid teflon”.During processing, they act as lubricants migrating to the surface, thus enabling higher flowabilities and, as a result, higher throughputs. In addition, these additives improve usage properties of finished products by enhancing scratch resistanc...

Kunststoffe international, 2016-03-08, Better by a Distance
...easy to monitor over distance and time. The disadvantage is that it is not suitable for every material. Experts distinguish here between the low and high-temperature range. Below a heating element temperature of 270 °C welding is performed with teflon-coated (PDW) aluminum plates, while above about 300 °C uncoated elements are used. Here, the special properties of the plastic (its adhesion to metals, wetting characteristics and weldability) must be taken into consideration. The welding of polyam...

Kunststoffe international, 2016-04-08, Good Fire Protection with Simple Flame Retardants
...el und Dienstleistungen UG, Bad Oeynhausen, Germany), grain size 128 µm.The sandwich panels were produced in a heatable molding tool with internal dimensions of 560 x 400 x 10.4 mm³ in a one-shot process. The mold’s surface is lined with Teflon foil to prevent glueing of the polyurethane. To avoid over-pressure, the mold is equipped with four exhaust channels (approx. 1 x 5 mm²) at the corners. First the lower cover layer (and, if present, the core reinforcement) is introduced into the mold, the...

Kunststoffe international, 2017-11-29, An Attritional Rendezvous
...ding properties with the high mechanical strength of POM [1].PTFE belongs to the group of semicrystalline thermoplastics and is marketed under the trade names Algoflon (Solvay Solexis), Dyneon PTFE (Dyneon), Fluon (Asahi), Polyflon (Daikin), and Teflon (DuPont). The molecular structure permits the conclusion that internally, PTFE has a polar nature, but externally it is completely non-polar, and is therefore anti-adhesive and practically non-wettable. This leads to low mechanical properties. Due...