PROCESS
CHARACTERISTICS
APPLICATIONS
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SPUNBOND NONWOVEN (2005)
Spunbond fabrics are produced by depositing extruded, spun filaments onto a collecting belt in a uniform random manner followed by bonding the fibers.
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. This is very advantageous and important in a highly competitive industry.
Spunbond fabrics are characterized by tensile, tear, and burst strengths, elongation-to-break, weight, thickness, porosity and stability to heat and chemicals. These properties reflect fabric composition and structure.
Today spunbonded webs are used throughout the automobile and in many different applications. Spunbonded civil engineering webs cover a multiple of related uses, such as, erosion control, revestment protection, railroad beds stabilization, canal and reservoir lining protection, highway and airfield black top cracking prevention, roofing, etc. The use of spunbond web as a coverstock for diapers and incontinence devices has grown dramatically in the past decade. In medical applications many traditional materials have been replaced by high performance spunbonded webs. Spunbonded fabrics are widely used as packaging material where paper products and plastic films are not satisfactory. 
PROCESS

The spun laid process is the fastest and probably the most economical way to produce nonwovens if the high output is taken into consideration. It is a manufacturing technique whereby molten polymers are directly converted into endless filaments, laid on a conveyor belt and eventually formed into nonwoven roll goods.

CHARACTERISTICS

The spunbonded webs represent a new class of man-made product, with a property combination falling between paper and woven fabric. Spunbonded webs offer a wide range of product characteristics ranging from very light and flexible structure to heavy and stiff structure.
POLYMERE

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.
PROPERTIES
Endless filaments in combination with a uniform discharge guarantee low weight while retaining strength. Spunbonds have a quite high air permeability, use no chemicals, are thermo bonded, and have a very good bidirectional machine direction/cross direction, and wear properties.
 
 

 
 
 
 
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