The invention belongs to the technical field of plastic woven bag
processing, and discloses a preparation method of woven bag flat wires with high stability. The preparation method comprises the following steps: S1, performing swelling pretreatment on ultrahigh-molecular-weight
polyethylene and paraffin oil; S2, blending and
drying the obtained swollen body,
polypropylene particles,
polypropylene-graft-
maleic anhydride (PP-g-MAH),
trimellitic anhydride, an
antioxidant, a filling master batch, a light stabilizer, a nucleating agent and
hydroquinone; S3, carrying out extruding formation on the material obtained by blending and
drying to obtain a film; S4, cooling the film by water, and then
cutting the cooled film into blank wires; S5, drawing the blank wires into flat wires by a drawing
machine; and S6, shaping the flat wires, and winding the shaped flat wires by a
winding machine. According to the invention,
polypropylene and ultrahigh-molecular-weight
polyethylene are blended to prepare the plastic woven bag flat wires, and the plastic woven bag flat wires have high tensile strength and high stability under different temperature conditions.