Existing polypropylene short fiber production line, the equipment and process flows belong to a spin, also known as short-range textiles, process routines, screw extruders, spinning machines, refrigerators, windows, a draft , Electric heating circulating wind tank, two drawing machine, lamination machine, cute machine, oven and hot air boiler, cutting machine, baler.

The raw material is put into the screw extruder for squeezing, friction, melting, so that the polypropylene crystallization structure is fully melted to produce physical changes, and the spinning wire is cooled, and then wound, a draft, two drafting Machine, a drafting. During the drafting, the tow is passed through a drafting roller and an electric heating circulating fan, and the wire beam is thermally refined and the tissue structure changes, with one, the drafting multiple between the two-channel drafts. The breakage of the filament beam is relatively increased, and the elongation is lowered. When the drag multiple reaches a certain time, then increase the drafting multiple, the tow will result in a break. Generally producing 3 denier, breakage power 3. 2cn / dtex, elongation of 65%. In the above-described production process, a drawing machine L, electric heating circulating wind box 2 and two drag 3; due to a drafting stress in a drafting, the tow is unbearable, easy to produce a broken wire; using an electric heating circulation fan It is easy to evaporate moisture on the surface of the tow, which is not conducive to the change in tow drafting and tissue structure.

Inventive content

The primary object of the present invention is to provide a production process and production line capable of improving fiber properties. To this end, the present invention proposes a  polypropylene short fiber production process including the following processes.

Distance, two drafting, force in the mouth, three drafting.

The above polypropylene short fiber production process is disposed between the one-drawn drafting and the secondary drafting.

Have a preheated softization process. Or between the award and two drafting, there is also a preheating soft

4 daggers and oil processes.

The above polypropylene short fiber production process is used as a water bath. Or the preheating softening and oil proof use a water bath. The heating soft chemical process adopts a steam tank.

At the same time, the present invention proposes a polypropylene short fiber production apparatus, including a drafting machine, two drawing machine, heating softening apparatus, and a three-channel drafting machine.

3 The above polypropylene short fiber production apparatus, further comprising a preheating softening device disposed between the one-stop stretcher and the two-drawer. The preheating softening device is a water bath.

The above polypropylene short fiber production apparatus, the heating softening device is a steam tank.

The present invention passes the decomposition of the first drafting into two drafting, by dispersion, and accumulating the original

To overcome stress concentration and easily produce broken wire defects, reduce elongation, and improve the breakage of fibers.

The present invention also increases a water bath, and the silk beam passes from a drafting machine, and then to the two-channel drafting machine, preheating the tow drafting and oil, and improve the activeization of the tissue structure of the tissue structure. ,

Alter the direction of the molecular structure; replacing the electric heating circulation fan in the steam tank, that is, the surface of the wire beam contains moisture, but also performs high temperature to the tissue, allowing the tissue structure to change, further improve the breakage of the fibers, Reduce elongation.