Process for adhesive tapes based on butyl rubber.Carlisle Hardcast Europe B.V. is said to be the only company in Europe to apply a continuous process on a co-rotating twin screw extruder for the production of hot melt adhesives used for high quality sealing tapes. Conventional processes used so far are carried out discontinuously on a combination of an internal mixer with a single screw extruder or on a dissolver with gear pump A Gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications. Gear pumps however are also widely used in chemical installations to pump fluid with a certain viscosity. . The time involved is said to be a major disadvantage of batch processes. While the batchwise production of 1,000 kg of butyl rubber butyl rubber: see rubber. takes between six and eight hours, the same quantity can be produced on the company's extrusion line in only one hour. At the same time, the continuous process offers outstanding flexibility and can be adapted to a new product within less than one hour. With discontinuous discontinuous /dis·con·tin·u·ous/ (dis?kon-tin´u-us) 1. interrupted; intermittent; marked by breaks. 2. discrete; separate. 3. lacking logical order or coherence. processes, this adjustment also takes considerably more time. The entire production line is said to comprise the most diverse components, ranging from the extremely complex preparation of the butyl rubber up to the integration of the laminating unit into the plant control system. The butyl rubber bale is first led on a conveyor belt conveyor belt One of various devices that provide mechanized movement of material, as in a factory. Conveyor belts are used in industrial applications and also on large farms, in warehousing and freight-handling, and in movement of raw materials. into a granulator where it is cut into granules Granules Small packets of reactive chemicals stored within cells. Mentioned in: Allergic Rhinitis, Allergies and before it is covered with a release agent in a mixer. After this first preparatory step, the butyl rubber is conveyed together with various additional formulation components by a pneumatic conveying system and a gravimetric metering unit into the ZE 90 UTX UTX United Technologies Corporation (stock abbreviation, AMEX) UTX Unreal Texture (a texture pack for Unreal-engine games) UTX Unit Training Exercise UTX Under Track Crossing twin screw extruder with a screw design that is specifically adapted to the process requirements. Several liquid metering pumps and side feeders are available for optionally introducing additional components into the processing section. The sticky melt is applied on the laminate to be coated by the wide slot die after having passed the gear pump and the screen changer Changer The name given to a clearing member that is willing to assume the opposite position of a futures contract within a larger alternative exchange, of which it also is a clearing member. . The semi-finished product is produced on the subsequently arranged coating line, composed of a let-off station, laminating unit, cooling section and winder, and processed to the desired final product by means of slitters. Berstorff GmbH www.berstorff.de |
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