Application of cellulose fiber in non-woven fabric

Biodegradable cellulose fibers include cotton fiber, viscose fiber, cellulose acetate fiber and Lyocell fiber. Viscose fiber used in spunlace nonwoven cellulose fiber has good skin contact, wearing comfort, physiological safety, hygroscopicity and easy finishing, and its products are easy to biodegrade. Fully possessed characteristics, non-woven fabrics using cellulose fibers as raw materials have unique uses in medical, nursing, hygiene products, cosmetics and other industrial fields. In developed countries in Europe, America and Japan, cellulose fiber has been widely used as an important nonwoven fabric raw material.
The spunlace method is a new nonwoven production technology emerging in recent years. The various nonwovens produced by this method have soft touch, high strength, good breathability and moisture absorption, so they are widely used and become the focus of the future development of the nonwoven fabric industry. . The spunlace method of non-woven fabric production is a non-woven fabric formed by entanglement and weaving of fibers using a "water needle" formed by high pressure. The use of clean water causes the fibers to knot and does not require resin bonding. It has the characteristics of simple production process and good environmental protection. Viscose fiber has the characteristics of good hygroscopicity, soft hand feeling, no allergic reaction to human body and natural degradation. It is especially suitable for medical hygiene materials and disposable materials. Viscose spunlace non-woven fabric has excellent drape and extremely soft feel, fluffy air permeability, high strength, good hygroscopicity, not easy to fluff, no chemical adhesive, is widely used in sanitary materials, family life Supplies and decorative cloth.
Viscose fiber can be used for spunlace non-woven fabric production alone or mixed with other synthetic fibers to make up for the shortcomings of synthetic fibers (such as poor hygroscopicity). In the production of spunlace nonwovens, 50% viscose fiber and 50% polyester fiber are often used to form a web. The viscose / polyester spunlace fabric is treated with water to make a surgical cover, which has good flexibility, drape, water absorption / water resistance and water repellency. Using spunlace cloth for surgical gowns and medical sheets is an ideal material. Many hospitals in developed countries such as Europe, the United States, and Japan use spunlace cloth for surgical gowns. In particular, the cloth surface is water-repellent after chemical treatment. When the blood wave of the patient splashes on the surgical gown during the operation, the water drops will automatically roll down, which can protect the clothing of the medical staff from being contaminated and the body from virus infection.
Viscose fiber is used in needle punched nonwoven fabric. After opening, air flow, mixed dosing, carding, net laying, pre-needle punching, main needle punching, needle punching, etc., the needle punched base fabric is made. Then it is made into activated carbon fiber base fabric through chemical treatment, drying, heat treatment, high temperature carbonization and activation. The product has the characteristics of fast adsorption speed, large adsorption capacity, long service life, easy desorption, heat resistance, insulation, anti-corrosion and so on. It can be widely used in environmental protection, medical and health care, civil health care, radioactive protection, precious metal recovery, wastewater and waste gas treatment and other fields, and has broad development prospects.
Viscose fiber used in the production of non-woven fabrics has the same advantages as cotton fiber, because there is no lint, the appearance of the product is more beautiful. When the viscose fiber used in the medical industry is manufactured by the spunlace method, the bleaching aid used must not contain nitrogen and cannot use adhesives. In order to make the final product have some special properties, the viscose fiber can also be mixed with polypropylene or polyester fiber.
Lyocell fiber Lyocell fiber performance Lyocell fiber is an environmentally friendly cellulose fiber, no pollution in the production process, has good biodegradability and hygroscopicity, flexibility, wearing comfort. It is different from ordinary viscose fiber in that fiber pulp (wood pulp or cotton pulp) is directly dissolved in an organic solvent, and the solution is extruded, spun and solidified into fibers after filtration, defoaming and other processes. This fiber performance is very superior:
It has all the natural properties of cellulose fibers, including good hygroscopicity, comfortable wearing, good gloss, excellent dyeability and biodegradability, and can be completely biodegraded in a short time; dry, wet strength and wet modulus high;
The shrinkage rate of the fabric is very low, its dimensional stability is good, and it has washability;
The cross-section of the fiber is round, the surface is smooth, and the fabric has a silk-like luster.
In addition to being widely used in woven fabrics and knitted fabrics, Lyocell fiber can also be used in non-woven industrial filter cloth, special paper, cigarette filter cores, medical material base cloth and other fields.
Lyocell fiber is used in spunlace nonwoven fabric. Lyocell fiber is widely used in spunlace nonwoven fabric production. Due to its high strength, good water absorption and fibrillation during processing, it has excellent characteristics for nonwoven fabric. The fiber has higher strength, smaller elongation, and higher initial modulus than other cellulose fibers. The product has less deformation during spunlacing, after spunlacing, and after finishing, and the product has good dimensional stability. Fibrillation into microfibers is an important characteristic of Lyocell fibers, especially when the fibers are mechanically wet-swollen (spunlace), and the fibrillation speed increases with mechanical action or spunlace pressure. Fibrillation can greatly improve the fabric fullness, water absorption and appearance quality of non-woven fabrics. Lyocell fiber spunlace can be widely used in disposable disposable wipes, medical gauze, feminine sanitary napkins, protective clothing, filter materials, coated base fabrics, battery separators, ecological composite materials and other fields.
Lyocell fiber is used in wet nonwoven fabric. The application prospect of Lyocell fiber in the field of synthetic leather base fabric and medical hygiene is very broad. Its application research in wet non-woven fabrics has achieved initial success, and its advantages in battery separator materials, medical materials, filter materials, thermal reputation printing and typing wax paper substrates are getting greater and greater. Its main features are:
Excellent hydrophilicity and dispersibility. Because Lyocell fiber is a kind of cellulose fiber, it has the same characteristics as vegetable cellulose fiber in water, which not only overcomes the defects of poor residual water and difficult to disperse of synthetic fiber, but also overcomes the easy adhesion of viscose fiber to make the forming process dispersed Difficult deficiencies;