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TT252 Test 1
Test One - Nonwovens
32
Other
Undergraduate 2
02/01/2011

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Term
Acrylic
Definition
nonwoven fabrics form these fibers are used for high chemical resistance applications
Term
glass fibers
Definition
used to form nonwoven fabrics for high thermal resistance applications
Term
rayon or cotton
Definition
used to form nonwoven fabrics required for high water absorbency applications
Term
nylon
Definition
used to form nonwovens for high strength and high abrasion resistance applications
Term
carding
Definition
a web forming technology that converts staple fibers to fiberweb
Term
fiberwebs produced from carding and crosslapping
Definition
are characterized by fiber orientation that is mostly in the cross machine direction
Term
fibers in a fiberweb orientation
Definition
produced by a carding machine - machine direction
Term
air lay
Definition
a webforming technology that converts staple fibers to fiberweb
Term
in airlay, what is required prior to feeding to air lay machine?
Definition
fiber cleaning(natural), opening and blending
Term
in air lay, fiberweb basis weight is controlled by-
Definition
speed of delivery apron and the rate of fiber feed
Term
wet lay
Definition
web forming technology that converts short fibers to fiberwebs with random fiber orientation
Term
needle punching
Definition
uses barbed needles to bond fiberwebs
Term
large needle barb
Definition
a type of needle required to produce patterned needled fabrics
Term
needle loom productivity
Definition
inversely proportional to needling density
Term
increase in number of needles in the needle board...
Definition
increases the needle loom productivity
Term
hydroentanglement
Definition
a mechanical bonding technology
Term
surface texture of hydroentangled
Definition
can be designed to resemble woven fabrics
Term
calendar bonding
Definition
bonds fiberwebs from blend of polyester and cotton fibers
Term
fiberwebs from blend of low melt polyester and standard polyester fibers
Definition
are thermally bonded to produce nonwoven fabrics
Term
fiberwebs bonded by thru-air thermal bondin
Definition
are characterized by their high bulk
Term
smooth calendar bonding with smooth rollers
Definition
are stiffer than those produced by engraved rollers
Term
end uses
Definition
tea bags, sand bags, sleeping bags, air bags, door panels, diapers, bandages, geotextiles, maps, protective clothing, roof covers 
Term
fiberwebs from 100% cotton...
Definition
canNOT be thermally bonded
Term
fiberwebs from a blend of cotton and polyester...
Definition
CAN be thermally bonded
Term
saturation bonding
Definition
a chemical bonding technique that produces stiffer and less bulky fabrics than spray bonding
Term
meltblowing technology
Definition
converts polymer flakes to nonwoven fabrics
Term
housewrap is an example of
Definition
spunbonded end use
Term
nonwoven fabric made from randomly laid
Definition
posesses isotropic behavior
Term
anisotropic example 
Definition
nonwoven made from parallel laid fiberweb
Term
nonwoven made from cross laid
Definition
anisotropic behavior
Term
nonwoven fabric properties are affected by
Definition
fiber orientation distribution function
Term
fiber surface area
Definition
cm^2/g; increases as the fiber diameter decreases and as the fiber linear density decreases
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