Non-woven fabric for alkaline battery separator and method for producing same

Non-woven fabrics have been widely used in non-durable garments, such as spunlace medical protective clothing, PP disposable spunbond protective clothing and SMS medical protective clothing. At present, the development of New Products in this field includes two aspects: one is the new development of existing materials in the field of clothing application; the other is the development of new non-woven fabrics.

Non-durable non-woven fabric

SMS non-woven fabric is a composite product of spunbonding and melt-blown. It has the advantages of high strength, good filtration performance, no binder and no toxicity. It has played an important role in medical and industrial filter materials. The latest application is It uses SMS to breathe, does not produce fiber dust, and prevents the human body from exchanging particles with the outside world. It is used in production environments where pharmaceuticals, bioengineering, optoelectronic processing, electrical components and chips are required to be highly clean. The spunbonded non-woven fabric is composed of high-strength continuous filaments, which occupies a large proportion in the disposable protective clothing market. The latest development is to add special additives or post-finish in the production process of spunbonded non-woven fabrics. The product has the functions of flame retardant, antistatic, anti-radiation, hydrophobic moisture, antibacterial and warmth.

In the development of new fibers, water-soluble non-woven fabrics are an environmentally friendly product, and their application range is gradually expanding. The use of polyvinyl alcohol water-soluble fibers to produce spunlace nonwoven fabrics is a good material for making radiation-proof and pollution-proof garments. In order to increase the protective effect, it can also be combined with the water-soluble film to increase the barrier properties of the protective clothing. In addition, in the use of new fibers, superabsorbent fiber (SAF) technology has been developed in the production of non-woven fabrics. The SAF-containing nonwoven fabric has a particularly good soft hand and water absorption property, and can quickly absorb the sweat of the human body when worn by the underwear, and increases the micro-environment comfort between the garment and the human body.

In the development of new composite non-woven materials, the United States has developed a new type of cotton fiber composite non-woven fabric, the surface layer is a thermal bonding non-woven fabric of cotton and polypropylene fiber, and the two-layer or three-layer composite material is combined with the spunbonded fabric. The product feels similar to that of pure cotton knitwear. It has good strength and elongation, water absorption and water retention, fast wicking speed and low pilling performance. After finishing, the elastic recovery is 50% elongation. The rate can reach 83% to 93%, suitable for making medical isolation suits and disposable underwear. In addition, the new generation of biochemical protective clothing developed by the US military makes full use of the advantages of woven, knitted and non-woven fabrics. The outer layer of the protective clothing is tear-resistant nylon/cotton fiber poplin, which is treated with water repellent; Non-woven fabric with activated carbon; the innermost layer is tricot warp knit. Compared with the existing protective clothing, this kind of clothing provides the military with special chemical protection, which increases the lightness of the clothing and reduces the cost, and can withstand at least 3 times of washing.

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