The invention provides a manufacturing method of hydrophilic
polyester short fibers for directly
spinning a spun-laced non-
woven fabric. The manufacturing method comprises the following steps: carrying out esterification on
polyester slurry, carrying out pre-condensation
polymerization, carrying out final condensation
polymerization,
spinning and carrying out after-finishing. In a pre-condensation
polymerization process,
comonomer polyethylene glycol PEG is added, the molecular weight of the added PEG is 1500-2000, and the adding amount is 0.5wt%-1.0wt% of a
polyester melt. The temperature of the melt obtained by the final condensation polymerization is controlled to be lower than 290 DEG C, so that the quantity of generated annular tripolymers is reduced and the spun-laced
processing efficiency of the fibers is improved. A hydrophilic modifier is added in an online polyester synthetic process and the polyester melt is directly used for
spinning; the production cost is lower compared with the production cost of
chip spinning, the quality uniformity of the short fibers is improved by 50% and the hydrophilic effect is obvious; eight paths of surface treatment are carried out, so that the distribution of a
fiber surface finishing agent is uniform and the attaching firmness is improved; the
fiber surface hydrophilic effect is improved in a spun-laced
processing process; and the polyester PET short fibers can be used for completely replacing
mucilage glue short fibers to be used as production raw materials of the non-
woven fabric, so that the whole cost of the non-
woven fabric is reduced.