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Seven kinds of classification of non-woven fabric, excellent processing and manufacturing technology

Category:Industry information  Date:2019-05-15  Views:1112
  Nonwoven Fabric (English name: Nonwoven Fabric or Nonwoven cloth) is also called nonwoven fabric, which is composed of directional or random fibers. It is called cloth because of its appearance and some properties.
  Simply put: it is not interwoven and knitted by one yarn after another, but the fibers are directly bonded together by physical or chemical methods, so when you get the sticky weights in your clothes, you will find that you can not pull out one thread after another.
  I. Characteristics of non-woven fabrics
  Non-woven fabrics have no warp and weft threads. They are very convenient to cut and sew, and they are light in weight and easy to set. Nonwovens break through the traditional textile principle, and have the characteristics of short process flow, fast production rate, high output, low cost, wide use and many sources of raw materials.
  Compared with textile fabrics, it has poor strength and durability, and can not be cleaned like other fabrics. Because the fibers are arranged in a certain direction, it is easy to split from the right direction and so on. Therefore, the improvement of production methods mainly focuses on the improvement of preventing splitting.
  Classification of non-woven fabrics
  Non-woven fabrics can be divided into:
  _spunlaced Nonwovens
  It sprays high-pressure micro-water into one or more layers of fiber mesh, so that the fibers are intertwined, so that the fiber mesh can be strengthened and has a certain strength.
  Characteristic:
  1. Flexible entanglement does not affect the original characteristics of the fibers and does not damage the fibers.
  2. Appearance is closer to traditional textiles
  3. High strength and low fuzziness.
  4. High hygroscopicity, fast hygroscopicity.
  5. Soft handle and good drape.
  6. Variable appearance.
  7. The production process is long and covers a large area.
  8. Complex equipment, high energy consumption and high water quality requirements.
  Application: Medical curtain, surgical clothing, surgical mask, medical dressing material, wound dressing, medical gauze, aeronautical rag, garment liner, coating substrate, advanced rag in electronic industry, cosmetic cotton, wet towel, mask coating material, etc.
  _Thermo-bonded non-woven fabrics
  It refers to adding fibrous or powdery hot-melt bonding reinforcement materials into the fibre mesh, which is then strengthened into cloth by heating, melting and cooling.
  Characteristic:
  Surface bonding hot rolling surface is more smooth, point bonding hot rolling is relatively loose.
  Product Application: Production of baby diapers and women's sanitary napkins coating materials, ointment base cloth, clothing lining, masks, etc.
  _Pulp air-flow non-woven fabric
  It can also be called dust-free paper and dry-process paper-making non-woven fabric. It uses air-flow netting technology to loosen the wood pulp fiberboard into a single fiber state, and then uses air-flow method to agglutinate the fibers on the screen curtain, and then reinforce the fibernet into cloth.
  Features: Good fluffy, soft handle, super moisture absorption.
  Application of products: Medical sanitary materials, especially disposable sanitary articles with super absorbency (such as diapers, sanitary napkins, wet towels, wipes, etc.).
  _wet Nonwovens
  It is to loosen the fibre material in the water medium into single fibre, at the same time mix different fibre materials to make fibre suspension slurry. The suspension slurry is transported to the netting mechanism. The fibre is netted in the wet state and then consolidated into cloth.
  Characteristic:
  1. High production speed, up to 400 m/min.
  2. Short fibers can be fully utilized.
  3. The uniformity of fibre mesh is good.
  4. Large water consumption and high one-time investment.
  Product applications:
  1. Special paper: Dust/liquid filter paper, tea bag.
  2. Industrial: filters, insulation materials, sound-absorbing materials.
  3. Medical use: medical backing, medical tape, surgical bag wrapping materials.
  4. Civil: wallpaper, etc.
  _spunbonded Nonwovens
  After the polymer has been extruded and stretched to form continuous filaments, the filaments are laid into nets, which are then self-bonded, heat-bonded, chemically bonded or mechanically strengthened to turn the nets into non-woven fabrics.
  Characteristic:
  1. The net consists of continuous filaments.
  2. Excellent tensile strength.
  3. There are many technological changes, which can be strengthened by various methods.
  4. The range of filament size change is wide.
  Product applications:
  1. Polypropylene (PP): Geotextile, tufted carpet base cloth, coated base cloth, medical and health materials, coating materials with disposable products, etc.
  2. Polyester (PET): filter material, lining material, tufted carpet base cloth, agricultural material, packaging material, etc.
  _Melt Blown Nonwovens
  Melt-blown nonwovens process: polymer feeding - - melt extrusion - - fiber formation - - fiber cooling - - Netting - - reinforcement into cloth.
  Characteristic:
  1. The web consists of very fine short fibers.
  2. Fiber mesh has good uniformity and soft handle.
  3. Good filtration and liquid absorption performance.
  4. The strength of the web is poor.
  Product applications: filter materials, medical and health materials, clothing materials, battery separator materials, wiping materials.
  _Needle-punched non-woven fabric
  It is a kind of dry non-woven fabrics. Needle-punched non-woven fabrics use the puncture function of needles to reinforce the fluffy fibre web into cloth.
  Characteristic:
  1. Flexible entanglement between fibers has good dimensional stability and elasticity.
  2. Good permeability and filtration performance.
  3. Full and fluffy feel.
  4. Various sets of patterns or stereo-forming products can be manufactured according to requirements.


  

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