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preparation of Woven fabric (Desizing (Method (浸泡 rot steeping, Acid…
preparation of Woven fabric
Grey inspection
num of faults >the inspection
so, good will be rejected
Faults:
Fabris nap
broken warp & weft
dirt
broken sledge
Singeing
Other checking
objective
gas singeing is recently used in industry
quenching
is required to avoid fire remained in the surface.
fabric surface temperature is
high enough to support desizing
burn-off protruding short fibres in fabric surface / to reduce the tendency of pilling.
fabric length, width, weight ,density, strength
efficiency
distance between burner and fabric (
both side
)
fabric condition (x
** wet / crease
in surface; Dry& :tada: open width form)
speed of fabric travel (
40-300m/mis
)
caution
thermoplastic fibers melt when singeing-- dyeing problem
Desizing
objectives
removing the some material in woven fabric
type of size 漿
native starches: potato,rice :no_entry: remove by chemical
non-starch polymer :warning: water soluble
modified starches: starch ether
Method
浸泡 rot steeping
Acid steeping
Oxidative steeping
Enzyme
steeping
(amylase
)
Test (effectiveness)
Iodine spot