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 Verfasst am: 22. Jun 2023 06:35 Titel: What is non-woven fabric? |
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What is non-woven fabric?
Non-wovens or non-woven fabrics are fabrics that are produced by mechanical, thermal or chemical processes, but without being woven and without the need to convert fibers into yarn, since the fiber webs are bonded together as a result of the inherent friction (entanglement) from one fiber to another thanks to these non-conventional processes.Get more news about non woven fabric price per kg,you can vist our website!
What is the origin of nonwoven fabrics and how are they produced?
To form the nonwoven fabric, textile fibers are randomly dumped into a tray without any one direction needing to predominate and are bonded to each other by mechanical, chemical or heat means in the form of webs, mats or sheets. Nonwoven fabrics are made mainly from polymers, are inexpensive, have high strength and are commonly used for plastics. They can consist of one or several layers, such as SMS fabrics, which are trilaminated.
These fabrics can be made from fibers (the most commonly used are polyester and viscose rayon) and both artificial and natural filaments.
Types of non-woven fabrics
The two main types of nonwoven fabric are NWF in polypropylene (PP) and NWF in Spunbond-Meltblown-Spunbond (SMS), depending on the process used to create them.
NWF in polypropylene
Polypropylene is a fabric made of soft textured plastic fibers which are fused together using ultrasound and steam. There are different thicknesses of this material and due to its hygienic characteristics it is ideal in the health sector due to the high safety it provides to doctors, patients and the user in general, in addition to the cost-effectiveness it offers.
NWF in Spunbond-Meltblown-Spunbond (SMS).
This type of fabric consists of 3 layers and is also made from 100% polypropylene. Of these 3 layers, the two outer layers are Spunbond and the middle layer is Meltblown.
Spunbond. To form a spunbond or Spunbond nonwoven fabric, polypropylene is stretched into a continuous filament, which is then placed in a web along a conveyor belt. With the addition of chemical, thermal or mechanical bonding processes, the fibers form a strong, durable fabric, which is often used in applications such as carpet backing or filters.
Meltblown. Like a spunbond nonwoven, a meltblown nonwoven also uses polypropylene, but it is fed through a linear matrix to form long, thin fibers. These fibers are cooled by bursts of hot air, which are then forced through a collector mesh to form a fabric that creates a fine filter and is self-adhesive. Meltblown nonwovens are widely used in the production of medical masks, diapers and feminine hygiene products.
By making this 3-layer sandwich, you get an improved fabric as you combine and add the properties of both types of fabrics while reducing the disadvantages of each. |
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