The invention relates to a
processing process of high-modulus low-shrinkage high-colour-fastness
polyester filament yarn by direct
melt spinning and real-time injection. By the
special design of steps including subjecting a
polyester raw material to shrinkage reducing
processing, performing modulus-increasing blending and melting melt
processing, performing low-frequency real-
time compression and injection, subjecting the melt to multi-stage direct-melting and
spinning, passing through a filter screen,
spinning, cooling, applying oil, stretching, and the like, and by special optimization of related parameters, the technical difficult problems of
fiber in the prior art, namely
low modulus, low strength and poor natural-color fasteness are overcome, and the objective of purification,
high color fasteness, high modulus and
low shrinkage is achieved. Under the obvious improvement on the
high color fasteness, the high modulus and the
low shrinkage which are good properties, stability,
thermal resistance, resistance to hot water, elasticity resilience, elongation and homogeneity are largely improved.