Production method of high-strength plastic woven bag

Abstract

The invention relates to a production method of a high-strength plastic woven bag. The production method comprises the following steps: firstly, preparing polypropylene primary flat filaments, polypropylene primary flat filaments and polypropylene filament yarns; secondly, performing hot stretching and hot setting to obtain polypropylene finished flat filament and polypropylene finished flat filaments; weaving on a circular weaving machine to obtain woven drum fabric; thirdly, performing coextrusion and two-way stretching on special two-way stretching level polypropylene materials to obtain a cylindrical polypropylene inner coating film, and enabling the cylindrical polypropylene inner coating film to penetrate through and sleeve the inner part of the woven plastic woven drum fabric; enabling the woven plastic woven drum fabric to enter a heating baking oven; performing pressing fit, lifting and winding to obtain the plastic woven bag with the polypropylene inner coating film. According to the production method disclosed by the invention, the high-strength polypropylene finished flat filament, the polypropylene finished flat filament and polypropylene filament yarns are respectively adopted in a warp direction and a weft direction for weaving, so that the strength of woven base cloth is guaranteed; in addition, the inner part of the woven bag is coated with a polypropylene thin film, so that the strength of the plastic woven bag is improved; the plastic woven bag is suitable for packaging powdery small particle objects.

Description

technical field [0001] The invention relates to the field of woven bags, in particular to a production method of a high-strength plastic woven bag. Background technique [0002] Plastic woven bags are packaging bags woven from plastic flat wires in the warp and weft directions, and are widely used in daily life and industrial and agricultural production. And existing plastic woven bag adopts warp and weft flat yarn to have certain hardness, and in weaving process, the flat yarn of warp and weft often rubs against each other, so that shearing force is produced between the intersecting flat yarn, in weaving process In the process, the strength of the flat yarn is damaged, and the strength of the woven plastic woven cloth is reduced, which cannot meet the requirements for materials with higher packaging strength. Contents of the invention [0003] The invention aims to solve the deficiencies of the prior art, and provides a production method of a high-strength plastic woven ...

AI Technical Summary

Problems solved by technology

And existing plastic woven bag adopts warp and weft flat yarn to have certain hardness, and in weaving process, the flat yarn of warp and weft often rubs against each other, so that shearing force is produced between the intersecting flat yarn, in weaving process The strength of the flat wire is damaged, which also reduces the strength of the woven plastic woven cloth, which cannot meet the requirements for materials with high packaging strength.