Production process of plant fiber nonwoven filter cloth for wet air puncture drainage reinforcement

Abstract

The invention relates to a production process for a wet-laid air puncture type plant fiber non-woven fabric, which comprises: first opening plant fiber raw materials into single fibers, and then preparing the plant fiber into a suspension slurry; preparing the plant fiber suspension slurry through a wet-laid equipment The plant fiber web is formed; the plant fiber web is punctured by the jet air, so that the fibers in the plant fiber web are entangled with the adjacent fibers or yarns, and form a mechanical bond, and finally the plant fiber web is reinforced; and then dried The final product of plant fiber non-woven fabric is obtained by shaping, hot-rolling reinforcement, and rolling. The invention is specially aimed at plant fibers, and can produce plant fiber non-woven geotextiles that meet the requirements in both strength and water permeability.

Description

technical field [0001] The invention relates to a production process of a wet airflow puncture type special plant fiber non-woven filter cloth for drainage reinforcement. The obtained special plant fiber non-woven filter cloth for drainage reinforcement can be used as a drainage board filter membrane, and belongs to the production technology of special filter cloth for drainage reinforcement field. Background technique [0002] As far as the applicant knows, geosynthetics generally refer to various types of products made from synthetic polymers, and are a general term for synthetic materials used in civil engineering and geotechnical engineering. Geotextiles are water-permeable planar geosynthetic materials, which are divided into non-woven (non-woven) geotextiles and woven (woven) geotextiles according to the manufacturing method. Non-woven geotextiles are fabrics in which fibers are combined in a non-directional arrangement, and woven geotextiles are fabrics in which two ...

AI Technical Summary

Problems solved by technology

However, plant fibers have high rigidity, poor deformation recovery and fiber uniformity, and the fibers are easily damaged during acupuncture reinforcement. The degree of mechanical bonding formed by the intertwining of fibers in the fiber web is not as good as that of synthetic fibers, and the strength of the fiber web after reinforcement cannot reach To the quality requirements in the non-woven geotextile standard

[0011] The dry-laid spunlace reinforcement process requires a large investment in equipment and high production costs, and the spunlace fabric is relatively thin and has a low grammage, so the scope of application in engineering is narrow

[0012] The wet-laid process is more suitable for plant fiber raw materials, but the strength index and water permeability of the produced fabric fiber non-woven geotextile cannot meet the engineering requirements

[0013] Whether it is acupuncture or spunlace, in the process of carding before puncture reinforcement, the fiber uniformity is not easy to control, which affects product quality

The spunbond web forming technology has a short process flow, and its web thickness uniformity is poor, which affects the uniformity of drainage

[0014] After searching, it is found that the Chinese invention patent with patent number 200910012612.1 and authorized announcement number CN101619520B discloses a degradable composite spunlace nonwoven fabric and its production method, which can produce thick and soft handfeel, good water absorption, good dust removal effect, low cost, and Degradable composite spunlaced nonwovens with degradable functions. However, since this patent is not aimed at drainage board water filtration, it is impossible to ensure that the obtained nonwovens can meet the technical parameters of the filter membrane.

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