SILICONE EXTRUSIONS
20Pages

Expertise. Innovation. Flexibility. These Regardless whether standard articles are the three properties which have or special products are concerned, BIW made BIW a leading company for all provides customers with products and aspects of the production of top quality solutions which are tailor-made to their hoses, profiles and seals made of sili- every requirements. cone. Success in the market is a result of a Modern machinery and up-to-date ma- consistent quality policy with continu- terial and production know-how, to- gether with highly motivated and ex- ponent of the management strategy....

SILICONE – A SPECIAL ELASTOMER The special thing about silicone is that The basic materials or "bases" used at Two alternative vulcanisation methods BIW are specially selected to guarantee are used for further processing of the synthetic rubber (HTV) based on the el- the product properties. When part of compounds produced at BIW, depend- ement silicon (Si), which is the basic the methyl groups are replaced deliber- ing on the final use: peroxide vulcani- component in silicone chemistry. Sili- ately by vinyl groups, the fundamental sation for technical applications, and con, the second most...

IT’S THE COMPOUND THAT COUNTS BIW's special know-how is in the pro- sical and physiological properties. The duction of top quality silicone com- compounds are then extruded. In the pounds as the basis for the final pro- end, the resulting hoses, profiles and ducts. This comes from a wealth of ex- seals show the following qualities, de- perience and intensive development pending on the specific recipes requi- work in the field of elastomer technolo- gy, where BIW sets innovative development standards time and again. Thanks to in-house compounding, additional components (additives) can be...

The silicone compounds then undergo of-the-art control technology together the extrusion process, in which the tool with the wealth of know-how of BIW's (die) creates the actual contour. Vulcan- experts has resulted in a self-regulating isation follows in a heating section control loop in which the measured without external pressure (pressureless data from the laser scanning process vulcanisation) with platinum catalyst are used directly as control parameters for addition curing or with peroxide for the running speed of the extrusion screw. In turn, this ensures that the profiles have...

- Crosshead extrusion: screw and cylin- gramme for example includes wear- proof "in-line" marking, together with tegrate textiles, metals or other mate- in-process extrudate shaping (e.g. hose rials as functional elements in silicone manifolds) or finished profiles (e.g. cor- ner-vulcanised frames or profiles with notches or ventilation punchings). - Co-extrusion: up to 3 extruders can be combined to produce combinations of hard/soft profiles, multi-coloured profiles and combined foam/solid profiles The in-house development team in BIW Technology Centre adopts the customer's own...

Silicone hoses and hose sections are ideal for both electrical insulation and for conveying liquids and other media. The prime characteristics in favour of using these products usually include the outstanding chemical resistance together with the wide range of temperatures covered by silicone. Other important advantages of silicone hoses include the high transparency or full range of colour possibilities which can be matched to samples or to the RAL colour chart, together with the large number of international standards covered by silicone so that it can be used in the domestic appliance...

Together with classical applications in beverage vending machines and coffee machines, hoses made of plasticiser-free, physiologically and toxicologically harmless silicone are also assuming increasing importance on the sanitary sector. The fact that hoses can be sterilised is highly significant in the medical and pharmaceutical sectors, and the fact that they do not turn brittle even under high thermal and mechanical loads is another major advantage. In addition to a broad range of standard transparent silicone hoses available ex stocks, BIW also offers a large number of hose solutions for...

There are applications for silicone profiles in practically all areas of industry, where they are used primarily as seals in degrees of hardness between 20° and 90° Shore A. Together with the classical applications in the electrical, heating and domestic appliance industry together with mechanical engineering, machine and plant construction, there are also a large number of applications in the aerospace industry (ATS100-approved silicone compounds), computer and switchboard manufacturing (EMI shields based on conductive compounds) or in window and facade construction where resistance to...

By using specially developed material formulations, silicone profiles can be bonded to rings for use as pipe seals for exhaust systems in oil- and gas-fired heaters. Clip seals are ideal for rapid mounting and simple, pure-grade waste sorting. These are produced with corresponding profile punchings for simple installation. After cutting to the right length, sealing frames of continuous extruded profiles are joined by BIW according to the following alternative methods: - vulcanising - bonding - welding The best method for each individual case is selected according to the customer's...

Properties of pressure hose reinforcements (Part 1) The unique combination of elastomer and textile processing technology under one roof puts BIW in a position to offer its customers a broad range of textile-reinforced pressure hoses for many different high-pressure or vacuum applications. The multi-stage production process combines an extruded silicone inner hose with a surrounding braid of the various different possible textiles and, on request, a coloured silicone coating or LSR fixing. This sandwich structure guarantees pressure resistances of up to more than 100 bar with multiple...

Hydrolysis resistance Flexural strenght ■ Fibreglass These hoses can be equipped with an electrically conductive inner, outer or intermediate ply in the co-extrusion procedure for discharging static electricity. With its various braiding machines, BIW is capable of producing almost any designs and structures in terms of braiding angle, number of braids or identifying threads. Wide-meshed braiding is used with highly transparent silicone compounds for easy recognition of the flow media. For applications in the fittings and sanitary sector, BIW produces silicone hoses with closed,...