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Source text - English Developed for an important German processor, the line features direct polyisobutylene (PIB) injection through the extruder screws. PIB is stored in a 7 m3 tank and then distributed to each of the 3 extruders (75-100-75 mm) via individual metering pumps.
Each extruder is equipped with 6-component gravimetric blending to control raw material usage and manage the PIB delivered to each extruder screw. This is achieved by constant monitoring and control of screw speed in combination with the metering pumps to maintain the required preset percentage (between 2 and 8% depending on the required tack level).
This design has demonstrated excellent behaviour in both the production of 25-micron (agriculture) and 12-micron (industrial) stretch film. The line includes the latest generation of coextrusion head, designed with axial symmetric distribution to reduce the physical mass resulting in very short residence times.
The cooling ring, together with an automatic thickness control system, has achieved thickness tolerances of less than 2% when producing the agricultural film and below 3% for the industrial one. The die can be configured with inserts ranging from 400 to 650 mm. For the production of agricultural film the die was fitted with 550-mm inserts.
The design features of the Innoex Coex 3 line include, for example, a non–contact sensor for thickness measurement, collapsing blow tables with carbon rollers, water cooled haul off rollers, special coating of the nip rolls, intermediate nip rolls and various other devices to improve web separation whilst maintaining the correct winding tension.
The winding system is equipped with three winders (face-to-face and backto- back) that allows the tack or elastic layers to be wound inside or outside the reel.
Translation - Chinese 这条为一家重要的德国生产商开发的生产线采用了从挤出机螺杆直接注入PIB（聚异丁烯）的装置。PIB储存在一个7m3的罐子里，然后通过独立的计量泵分配到3台挤出机（75-100-75mm）。
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