| 摘要 |
The invention relates to polymer processing equipment and, in particular, to equipment for producing a flat fibre made from synthetic raw material and having predetermined characteristics by means of polymer extrusion. The flat fibre made from synthetic raw material and produced using the aforesaid equipment can be used for different purposes in many branches of industry. It can be used, for example, in the weaving industry and the food industry and as a packaging material, and can compare favourably with known fibres as a result of its high durability and resistance to the effects of petrol and moisture, as well as being reusable. Furthermore, the flat fibre made from synthetic raw material can be used in radio electronics, the instrumentation industry and other branches of industry. The objective set by the designer of this novel extrusion line for producing a flat fibre made from synthetic raw material was to produce an extrusion line for producing a flat fibre made from synthetic raw material which would make it possible to reduce the cost of manufacturing said flat fibre by using cheap or recycled material without drastically reducing the durability of the fibre or other properties necessary to specific types of fibres, thus making it possible to use the fibres produced with the aid of the novel extrusion line in the manufacture of products for different purposes. The technical result achieved in the process of solving the above problem is the possibility of forming layers with predetermined properties in a flat fibre made from synthetic raw material and produced using the aforesaid extrusion line and cheaper or recycled material. The essence of the invention is that in addition to comprising a slot die for forming a film, a device for cooling said film, devices for cutting the film into strips, stretching said strips and shrinking and winding the resultant fibres on cores, and at least two extruders for shaping melts with different predetermined properties, the extrusion line for producing a flat fibre made from synthetic raw material comprises a device for distributing the melts across at least three layers of a multilayered film. Further, the cooling device is in the form of a water-filled bath or chill rollers, downstream of which the line is provided with appliances for removing water from the film in the form of rollers with an elastic material about the periphery thereof, followed immediately by slotted pipes for the removal of the remaining moisture. |
