Viton - ACM, FKM - The Chemours Company

Kunststoffe international, 2005-11-21, Driving the Automotive Industry: Engineering Elastomers
Trend Report Crosslinking Plastics Engineering Elastomers Driving the Automotive Industry. Within the elastomer-manufacturing industry, there is increasing concentration and focus on product groups. Regardless of this, the trend towards relocating production of standard products within the expanded European Union continues to advance. In the future, China and India will also increasingly emerge both as markets and production locations for engineering elastomer products. Werner P. Lauhus The Eu...

Kunststoffe international, 2005-11-21, Drying, Conveying and Dosing of PET
...ing moisture again, dry air heated to about 160°C is used as the conveying medium. To minimise heat losses and noise along the conveying paths, the entire conveyor pipe system is insulated. The feed stations are suitably equipped with special Viton seals and all electrical and electronic components are designed to withstand the high temperatures. An air/water heat exchanger was connected upstream of the vacuum pumps to protect them. A multiple feed station conveying system designed for lower...

Kunststoffe international, 2005-11-21, Elastomers
...ng used as a price compromise for highly demanding ambient conditions. Fluor-Rubbers (FPM, TFE/P): Standard products in this elastomer class (Viton, DDE; Dyneon, Dyneon LLC; Tecnoflon, Solvay Ausimont) have high temperature and chemical resistance and good sealing effect at relatively high temperatures (Fig.8), though poor base resistance. They are being continually improved. The new Viton product range GLT-S has an improved polymer architecture, which leads to a much-improved processability wi...

Kunststoffe international, 2005-11-21, Improved Processing and End-use Properties
...e properties of elastomer components. Seals produced from these new rubbers meet the strict requirements of the automotive, chemical, aerospace and semi-conductor industries. Compared with previously available grades, a new fluorine rubber (grade: Viton, manufacturer: DuPont Dow Elastomers) with improved polymer architecture enables more resistant and durable seals to be produced with better stability to high and low temperatures (down to –50°C) in the presence of aggressive media such as ...

Kunststoffe international, 2005-11-21, Multi-cavity Mould for Rubber Processing: Near-zero Tolerance
...rious Materials The mould produced by O.C.S. srl in Adrara S. Martino (Bergamo/Italy) is used to manufacture small O-rings with an external diameter of 13.5mm and a thickness of 1mm. The parts are produced from various materials (silicone, NBR, Viton, ACM, EPDM, HNBR etc.) and used as dynamic seals for hydraulic and pneumatic precision instruments. The permitted mould tolerances are ±0.015mm for the thickness of the O-ring and ±0.040mm for the inside diameter. Compensating for the shrinkage of t...

Kunststoffe international, 2006-04-25, TPU Processing Aids: Polyethylene Extrusion without Melt Fracture
...d polyethylenes are subject to various melt instabilities. They cannot therefore be processed without the addition of polymer processing aids (PPA). Until recently the only PPA on the market for use in processing PE were fluorinated products (e.g. Viton from DuPont-Dow Elastomers, Dynamar from Dyneon and Kynar from Arkema). These processing aids achieve processing improvements and better-quality end products. Because of their advantages, fluorinated PPA are used, despite their high price, in the...

Kunststoffe international, 2006-06-29, Fluoropolymer Processing Aids: Particle Size and Activity
... aids. An additional significant advance was clarification of the relationship between dispersion aids and fluoropolymer dispersions. This resulted in the development of an innovative dispersion aid that is employed with the fluoroelastomer Viton FreeFlow Z200. On the basis of these developments, it was possible to optimise the fluoropolymer viscosity in the presence of dispersion aids. The results of these insights are new, highly effective dispersion aids utilising Z technology from DuPont Per...

Kunststoffe international, 2010-09-24, Elastic Diversity
...artment and electromobility with its latest high-temperature ethylene-acrylic rubber Vamac ultra HT (Fig. 2). This offers processors performance and cost advantages over the usual materials. For even more extreme requirements, the company supplies Viton fluoroelastomer, which retains its sealing function from - 40 to +203°C. This product also has good resistance to permeation and chemical attack by biofuels (RME and ethanol), which will be used increasingly in internal combustion engines in futu...