Spunbond

PP spunbond, PET spunbond, SS,SSS, SMS,SSMMS Non-woven Fabric, Hydrophilic spunbond, Hydrophobic spunbond, Spunbond for medical pad, Spunbond for baby diaper, Medical protective clothing spunbond

Spunbond fabrics are produced by depositing extruded, spun filaments onto a collecting belt in a uniform random manner followed by bonding the fibers. The fibers are separated during the web laying process by air jets or electrostatic charges. The collecting surface is usually perforated to prevent the air stream from deflecting and carrying the fibers in an uncontrolled manner. Bonding imparts strength and integrity to the web by applying heated rolls or hot needles to partially melt the polymer and fuse the fibers together. Since molecular orientation increases the melting point, fibers that are not highly drawn can be used as thermal binding fibers.  Spunbond products are employed in carpet backing, geotextiles, and disposable medical/hygiene products. Since the fabric production is combined with fiber production, the process is generally more economical than when using staple fiber to make nonwoven fabrics.

Isotactic polypropylene is the most widely used polymer for spunbond nonwovens production. It provides the highest yield (fiber per kilogram) and covering power at the lowest cost because of its low density. Considerable advances have been made in the manufacture of polypropylene resins and additives since the first spunbond polypropylene fabrics were commercialized in the 1960s. Although unstabilized polypropylene is rapidly degraded by UV light, improved stabilizers permit several years of outdoor exposure before fiber properties deteriorate. To reduce cost, scrap or polypropylene fibers of inferior quality may be repelletized and then blended in small amounts with fresh polymer to produce first grade spunbond fabrics. This is very advantageous and important in a highly competitive industry.

Spunbond polyester fabrics typically have more uniform properties than other structures of nonwoven.  They are produced using medium to coarse dpf continous filament fibers.  Spunbond polyester fabrics are supplied in widths ranging from 1" to 204" with basis weights ranging from 12 gsm to over 300 gsm.
Common characteristics include:
excellent thermal properties
superior moldabilty
very strong
high dimensional stability
inherently UV stable
good permeability 

Spunbond Polypropylene fabrics are commonly made with fine to medium dpf continuous filament fibers.  These fabrics are uniform and  dimensionally stable.  Polypropylene fabrics require additives for UV and heat stability.  Spunbond polypropylene fabrics are supplied in widths ranging from 1" to 200" with basis weights ranging from 8 gsm to over 200 gsm.

Common characteristics include:
soft hand
economical

Spunbond Bico products can be produced using different ratios of two different filament fibers, PET/PP, PET/PE, PET/PA, and PET/CoPET. These products are supplied in widths ranging from 1" to 165" with basis weights ranging from 20 gsm to 250 gsm. 

Common characteristics include:
weldable 
moldable
high dimensional stability
good fiber distribution
good permeability