Production method for polypropylene spun-bonded needle-punched geotextile

Abstract

A production method for a polypropylene spun-bonded needle-punched geotextile mainly includes the following steps: polypropylene chips are conveyed into a screw extruder and extruded out, the melt enters a spinning manifold via a filter, and is measured and extruded into filaments by a spinneret plate, the filaments are cooled by cross wind, drafted by duct airflow, then separated, swayed and formed into a web on a lapper, the web is outputted to a needle machine and needled to be bound, and after tension is adjusted, the web is trimmed and rolled, so that the polypropylene spun-bonded needle-punched geotextile is formed. Various processes after spinning, such as bundle stretching, rolling, drying, shaping, cutting off, packing, unpacking, blending, carding and web forming, are dispensed, consequently, the production process is greatly shortened, the production cost is lower, and the production efficiency is higher; the product has higher strength and better uniformity, thermal shrinkage and various indexes are more stable, and the product is incomparable with polypropylene staple geotextile and the like.

Description

technical field [0001] The invention relates to a method for preparing a synthetic fiber nonwoven product. Background technique [0002] Those skilled in the art know that geotextiles have functions such as filtration, drainage, isolation, reinforcement, and enhancement. For this reason, geotextiles have become the fourth largest building material after my country's steel bars, cement, and wood. At present, the production process of polypropylene geotextiles in my country is mainly to use polypropylene staple fibers to form geotextiles by carding, cross-lapping, and needle-punching consolidation. Polypropylene staple fiber is melt-spun from polypropylene chips through a screw extruder, cooled, clustered, wound, and doffed to form primary fiber bundles, and then multiple primary fiber bundles are bundled again, stretched, crimped, and shaped and dried , cutting, packaging and other processes to make finished staple fibers. This process is made by a two-step process, ...

AI Technical Summary

Problems solved by technology

Its shortcomings are: 1. The production process of staple fiber polypropylene geotextile is long, the production efficiency is low, and the energy consumption is large.

2. Since this process first cuts the polypropylene fiber into short fibers, then combs it into a web and consolidates it into a nonwoven fabric, the tensile strength and elongation at break (elongation) of the fabric surface will inevitably be affected, thus Some performance indicators of polypropylene geotextiles are restricted

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