TT 105 FINAL Flashcards
Towels and bed-linens are examples of fabricated textile products in the ….
Household and
Institutional Textiles
are Paper and leather products textiles?
No
Textile fibers have a length of …
100 times its diameter
Interstices
are holes or void space within a textile fabric which contain air
Supply chain management implies a sequence of events getting desired products to
customers.
true
Supply chain management involves
forecasting, purchasing, scheduling, financing,
distribution and service.
Fibers can be classified as
natural vs. manufactured fibers
Natural fibers can be
cellulosic (cotton), protein (wool) or mineral (asbestos)
Manufactured fibers can be called what if produced from synthetic polymers
synthetic
Rayon and acetate are..
cellulosic fibers
nylon, aramid (Kevlar®), polypropylene and
polyester are
synthetic fibers
Cashmere, mohair, qiviut, angora and tussah silk are examples of what
natural protein fibers
harvested from animals.
Flax, industrial hemp, jute and ramie are all examples of
natural cellulosic fibers harvested
from plants
Fiber properties often depend upon their
structure (morphology), temperature, humidity and
light exposure
Mechanical properties depend on
polymer type, morphology of fiber (shape, length), etc.
Applying force (i.e., tension or stress) to a yarn causes it to ____ in length
increase
Elongation to break measures
how much a material stretches before it breaks.
Hydrophobic fibers absorb
little moisture
hydrophilic fibers absorb
moisture readily
Small slope in the stress-strain curve means easy to stretch
true
Swimsuit or hosiery should use a fiber with
high elongation
Yield point is where stress-strain curve begins to
flatten
. Tenacity refers to
stress at which fiber breaks
Natural fibers can readily be identified using
microscopy
Wool has how much moisture regain
13-18%
materials get stronger when wet
cotton
materials get weaker when wet
silk
Fibers can have many different cross-sectional shapes
true
Polymer properties depend on
chemical composition, degree of polymerization,
intermolecular forces, copolymer, and morphology of polymer
Biocomponent
Two polymers through different parts of the same spinneret hole to form one
fiber
Bicomponent filaments can have variable properties depending upon the properties of each
polymer component.
true
Crystal is a solid that has
regularly repeating internal arrangement of its atoms
High crystallinity implies that it is
stiffer, stronger, and harder to dye
Dependent upon arrangement, copolymer can be
random, alternating and block formats
Yarn is an intermediate product for manufacturing fabric; Thread is a product for joining
parts and components
true
Filament yarn characteristics can be affected by
filament count, cross-section, etc.
Filament yarn size is measured by the
linear density
Denier shows several parameters
number of piles, denier per ply, and number of filaments
. Increase in yarn stretch can lead to a
greater elongation and recovery
Thermoplastic polymers can be melt spun into
continuous filaments.
