Non-woven articles science

      Non-woven production process and description

          1. What is a non-woven fabric?
          2, the nonwoven fabric manufacturing process is kind of how?
          3, non-woven production and life in the specific application is kind of how?
          4, the advantages and disadvantages of non-woven cloth and common characteristics of contrast?
          5, Chang Gung new material is how to do it?

      First, non-woven Profile
 
      Non-woven (English name: Non Woven Fabric or Nonwoven cloth), also known as non-woven, is directed or random fiber and composition, is a new generation of environmentally friendly materials, with moisture, breathable, flexible, lightweight, non-combustion, easily biodegradable , non-toxic and non-irritating, colorful, inexpensive, recyclable and so on. Such as the use of polypropylene (pp material) pellets as raw materials, high temperature melting, spinning, shop classes, hot take-up from a continuous one-step production. Because having a certain appearance and performance called cloth and cloth.
     
      Second, the non-woven fabric process
 
      In fact non-woven production technology and traditional fabrics knitted fabrics are completely different. As shown:

    Figure 1. The nonwoven fabric manufacturing process
                    
      The nonwoven fabric is a nonwoven fabric, it is the direct use of polymer chips, staple fibers or filament fibers by air-laid or mechanically, then after spunlaced, acupuncture, or hot-rolled reinforcement, and finally after finishing forming a non-woven fabric.
 
      Third, the advantages and disadvantages of non-woven fabrics
    
      1. Advantages:
 
      Non-woven fabric has a soft, breathable and new fiber products planar structure, the advantage does not produce lint, tough, durable, silky soft, but also enhance the kind of material, but also the feeling of cotton, and cotton compared , the nonwoven fabric forming the bag easily, and are cheap.
 
      On the environment, the majority of non-woven materials currently used are polypropylene, polyethylene and plastic raw materials, although the names of the two substances are similar in chemical structure but very different. Polyethylene chemical molecular structure has a very strong stability, extremely difficult to degrade, so plastic bags need 300 years to decompose completed; and the chemical structure of polypropylene is not solid, the molecular chain can easily be broken, which can effectively degrade and enter the next cycle in the form of a non-toxic environment, and a non-woven shopping bags within 90 days can be completely decomposed. And non-woven shopping bags can be reused more than 10 times, abandoned after the pollution of the environment, only 10% of plastic bags.
     
      2. Disadvantages:
 
      At the same time, compared to traditional woven fabric, its strength and durability is poor, and can not be like other fabrics, like cleaning the fibers are arranged in a certain direction, so easy to split from the perpendicular direction.
    
      Fourth, non-woven fabric manufacturing processes Classification and Application
 
The nonwoven fabric manufacturing process are the following:
     
     1. Spunlace: spunlace process is the high-pressure water jet to a fine layer or multi-layer fiber web so that the fibers entangled with each other, so that the web can be reinforced rather have a certain strength. As shown:

Figure 2. Process characteristics and application of spunlace
 
      2. Heat: heat-bonded nonwoven web means adding fibrous or powdered hot melt adhesive reinforcement materials, fiber network and then cooled after heating and melting the reinforcement into cloth. As shown:

Figure 3. Thermal non-woven process characteristics and process
 
      3. Pulp airlaid: airlaid nonwoven fabrics can be called airlaid dry papermaking nonwoven fabric. It is the use of airlaid technology wood pulp fiberboard opener into a single fiber state, and then use the airflow method on the fiber aggregation into a network of screens, fiber network and then reinforcement into cloth. As shown:

Figure 4. airlaid process characteristics and application
 
      4. Wet: Wet nonwoven fabric is placed in an aqueous medium fiber material opening into a single fiber, while the mixing of different fiber materials, made of pulp fiber suspensions, suspended pulp conveyor into a network to institutions under wet fibers into a network and then reinforcement into cloth. As shown:

 Figure 5. Process characteristics and application of non-woven wet
 
     5. Spunbond: Spunbond nonwoven fabric is in the polymer has been extruded, stretched to form a continuous filament, the filament laying into a web, the web and then through the self-adhesive, thermal bonding, chemical bonding or mechanical reinforcement ways to make the web into a nonwoven fabric. As shown:

Figure 6. spunbond nonwoven process characteristics and application
 
     6. Meltblown: meltblown nonwoven process: the polymer feeding --- melt extrusion --- fiber formation --- fiber cooling --- into the network --- reinforcement into cloth. As shown:

 Figure 7. The melt-blown nonwoven process characteristics and application
 
     7. Acupuncture: Acupuncture non-woven fabric is a dry non-woven fabrics, non-woven fabric is the use of acupuncture needles puncture role fluffy fiber mesh reinforcement into cloth. As shown:

Figure 8. Process characteristics and application of acupuncture non-woven fabric
  Fifth, Chang Gung new material is how to do it?
      Chang Gung new material is the production of car mats, car decoration materials, home decoration materials, environmental protection filter materials and high-grade geotextile material through acupuncture.
The principle of acupuncture:
      Use a triangular cross-section (or other cross-sectional) barbed barbed edge for web repeated puncture. When the barbs through the web, the web surface and the inner layer of fiber enforced locally penetrate inside the web. Due to friction between the fibers, the original fluffy webs is compressed. When the needle exit webs, piercing barbs and stay out of the fiber bundle in the web, so many tow catches hold of the web so that it can not restore the original fluffy state. After needling a number of times, a considerable number of fiber bundles are pierced web, so that fiber intertwining web, thereby forming a certain strength and thickness of the nonwoven material acupuncture.

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