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ENGINEERS INDIA RESEARCH INSTITUTE
4/54, Roop Nagar, Delhi-110007 (India)
Phone: 9289151047, 9811437895, 9811151047
E-mail:
[email protected]
Website: www.eiriindia.org
NON WOVEN CARPET [NEEDLE PUNCHED] AND
PAINTED NON WOVEN CARPETS
[EIRI/EDPR/4731] J.C.: 2951XL
Nonwovens are not made by weaving or knitting and do not require converting the
fibres to yarn. Nonwoven fabrics are engineered fabrics that may be single-use
disposable or a very durable fabric. They are used in numerous applications,
including; baby diapers, adult incontinence products, wet wipes, surgical drapes
and covers, liquid cartridge and bag filters, face masks, air-conditioning filters,soil
stabilizers and roadway underlayment, erosion control, drainage systems,
insulation (fiberglass batting), pillows, cushions, and upholstery padding,carpet
backing, automotive headliners and upholstery, house wraps, anddisposable
clothing (foot coverings, coveralls).
The characteristics of the fibrous web are a key determinant of the physical
properties of the final product. The choice of methods for forming webs is
determined by fibre length. Initially, the methods for the formation of webs from
staple-length fibres were based on the textile carding process, whereas web
formation from short fibres was based on a wet laid process similar papermaking.
These technologies are still in use, but methods based forming a web directly from
filaments immediately they exit an extruder (Spun laid) have also been developed.
Fibrous webs have little mechanical strength and a further manufacturing process
is necessary to form a fabric with useful properties. There are number of
processes which are used to accomplish this as described in next section.
Needle punching is a process of bonding nonwoven web structures mechanically
interlocking the fibers through the web. Barbed needles, mounted on a board,
punch fibers into the web and then are withdrawn leaving fibers entangled. The
needles are spaced in a non-aligned arrangement are designed to release the fiber
as the needle board is withdrawn.