Non-woven science time! The development and application of bio-based fibers in non-woven materials simplified version

In recent years, bio-based fibers have been widely used in non-woven materials. According to the source of raw materials and production processes, they can be divided into four categories 1. Regenerated cellulose fiber and its non-woven material Regenerated cellulose fiber can be made into non-woven material by needle punching, spunlace, thermal bonding, etc. , Used in personal hygiene care, filtration and other fields. Viscose fiber has good moisture absorption, softness and entanglement properties, and is widely used, but it has low wet strength, so it is often mixed with other fibers to make nonwoven materials . Through the spunlace process, viscose fiber and silk fiber are mixed and reinforced into sanitary product covering materials, which can be mixed with wood pulp fibers to make flushable wet wipes. The blend of chemical fiber can be made into mask base cloth, car interior, etc. In addition, the viscose fiber can also be made into a filter material through a needle punching process, such as mixing it with chitosan, the prepared needle punched non-woven material has antibacterial properties It is a dressing material with excellent performance; it is a multi-layer non-woven material prepared by mixing it with hemp fiber and PA6 nanofiber, which has better oil absorption and filtration performance than general filter materials . 2. Regenerated protein fiber and its non-woven material Regenerated protein fiber is limited by mechanical properties, so it can only be prepared by spunlacing, needle punching and other processes. , The prepared non-woven material has good skin affinity and comfort, good compatibility with the human body, and can be used in the field of health care, bioengineering, etc. . 3. Bio-based synthetic fiber and its non-woven material PLA fiber has good biocompatibility and biodegradability, and can be dry or spunbond , Melt-blown method to form a net, and then through acupuncture, thermal bonding method to form a non-woven material for medical treatment, packaging materials, filtration Materials, agricultural materials and other fields. 4. Marine bio-based fiber and its non-woven materials Marine bio-based fiber refers to the fiber raw materials from the animals and plants in the ocean, such as algae, shrimp, crab shells, etc. . This type of fiber generally has good physical and chemical properties, biocompatibility, antibacterial properties, etc., and can be used to prepare non-woven materials through a needle punching process. Medical dressing field; non-woven materials prepared by spunlace non-woven technology are generally used for personal hygiene materials, such as facial masks, diapers, etc.; Electrospinning into micro-nano fibers can be used for the development of biological tissue engineering materials.