WHAT ARE SPUNBOND NONWOVENS?
Spunbond nonwovens are fabrics produced by depositing extruded, spun filaments onto a collecting belt in an uniform but random manner followed by bonding the fibers. The fibers are separated during the web laying process by air jets or electrostatic charges. Bonding is formed by applying heated rolls or hot needles to partially melt the polymer and fuse the fibers together. Since the fabric production is combined with fiber production, the process is generally more economical than when using staple fiber to make nonwoven fabrics

If two polymers are combined into a single fiber type during the extrusion, it is called bi-component fiber. Bi-component fiber possess a lower melting component, which acts as a sheath covering over a higher melting core.

Polypropylene is the most widely used polymer for spunbond nonwovens production, because it provides the highest yield (fiber per kilogram) at the lowest cost due to its low density.
CHARACTERISTICS AND PROPERTIES
Spunbond nonwovens are characterized by tensile, tear, and burst strengths, elongation-to-break, basis weight, thickness, porosity and stability to heat and chemicals. These properties reflect fabric composition and structure.

- High liquid retention capacity due to high void ratio
- Basis weights range between 5 and 800 g/m2, typically 10-200 g/ m2
- Thickness range between 0. 1 and 4.0 mm, typically 0.2-1.5mm
- High strength-to-weight ratios compared to other nonwovens
- High tear strength
- Good fray and crease resistance
- High in-plane shear resistance
APPLICATIONS
Spunbond nonwovens are widely used in hygiene industry because of following two reasons:
1)The unique structure and properties of spunbond mentioned above, which helps the skin of the user stay dry and comfortable,
2) Cost effectiveness over other conventional nonwovens

Applications in hygiene industry:
- Top sheet
- Acquisition layer
- Distribution layer
- Backsheet

 
KEY SPUNBOND NONWOVEN SUPPLIERS
Next month we will introduce key spunbond nonwoven suppliers for hygiene industry.