Method for preparing natural cellulose non-woven fabric in wet spunbond mode

Abstract

The invention provides a method for preparing a natural cellulose non-woven fabric in a wet spunbond mode, which comprises the following steps of: adding an N-methylmorpholine N-oxide (NMMO) solvent into pulp serving as a raw material, and mixing and dissolving to form dope; extruding the dope from a spinning nozzle in a spunbond mode to form a long cellulose strand, and performing cold stretching on the long cellulose strand through an air gap; adding into solidification liquid for solidification and regeneration; stretching at a high speed by using an air drafting device, and stacking into a net on a collecting net to form the non-woven fabric; and washing the non-woven fabric, rolling by using a squirt, drying, winding and the like to prepare the natural cellulose fiber non-woven fabric with a continuous long fiber pattern.

Description

【Technical field】 [0001] The invention relates to a method for preparing natural cellulose non-woven fabrics by wet spunbonding, especially an environmentally friendly process with low manufacturing cost and no environmental pollution. The finished non-woven fabrics are in the form of long fibers, and It has good physical properties such as air permeability and water absorption, and can be used in textiles, medical and sanitary materials, filter materials, biotechnology materials, and photoelectric wafer wiping. 【Background technique】 [0002] At present, the non-woven fabric made of man-made synthetic fibers is made of molten high-molecular polymer raw materials, which are extruded and stretched by direct extrusion (spunlaid) to form continuous long fibers, and then stacked into a net shape. Long fibers can endow non-woven fabrics with good air permeability and water absorption and other physical properties, so they have been widely used in fields such as hygiene products, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the non-woven fabric made of man-made synthetic fibers is made of molten high-molecular polymer raw materials, which are extruded and stretched by direct extrusion (spunlaid) to form continuous long fibers, and then stacked into a net shape. Long fibers can endow non-woven fabrics with good air permeability and water absorption and other physical properties, so they have been widely used in fields such as hygiene products, wiping materials, medical protection and filter materials; in addition, the non-woven fabrics produced by the aforementioned direct extrusion method Output, its market share according to the statistics of the American Nonwovens Industry Association (INDA), has grown from 33.5% (second place) in 1994 to 43.7% (first place) in 2009, and the overall output has reached 2.7% per year. 10,000 tons, and the largest amount of raw materials used in its production are polypropylene (PP), polyester (PET), polyethylene (PE) and nylon (Nylon), which together account for 96% of the total usage, so When these large amounts of man-made synthetic fiber non-woven fabrics become waste after use, they will have a huge adverse impact on the environment because they cannot be decomposed by the natural environment. Moreover, the raw materials for these man-made synthetic fibers are not inexhaustible. Due to the shortage of petrochemical raw materials, the cost of obtaining them will gradually increase. Recently, the manufacturers of non-woven fabrics have gradually turned to natural materials to replace artificial synthetic fiber raw materials, but they have discovered that the natural materials used to produce non-woven fabrics. It must be achieved by wet method or water needling method with a longer process. In addition to the higher cost than the direct extrusion method, the fiber type is also short fiber, which weakens the air permeability and water absorption of non-woven products. Therefore, how to use natural fiber raw materials and low-cost manufacturing processes to produce long-fiber non-woven products has become an urgent task for breakthroughs

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