Internal direct coating process of composite plastic woven bag and preparation method thereof

Abstract

The invention discloses an internal direct coating process of a composite plastic woven bag and a preparation method thereof. The preparation method is characterized by comprising the following steps:first sending finished product ribbon-like filaments into a weaving machine to form a piece of woven bag cloth serving as laminated woven basic cloth, and then smearing the paint on the inner side ofthe woven basic cloth to form a liner. The paint is prepared from the following raw materials in parts by weight: 40 to 60 parts of polypropylene powder, 5 to 8 parts of cooling master batch, 3 to 5parts of coating-type polyethylene, 1 to 2 parts of modifier, and 1 to 2 parts of aid. All raw materials are mixed at a high speed, heated, extruded, coated with a film, laminated, cut, and sewed. Thespraying paint adopted in the invention is a novel environment-friendly material and is sprayed on the inner side of the coating film of the woven bag. The composite plastic woven bag has the characteristics of compactness, continuity and no seam of the coating. The produced woven bag is resistant to corrosion, resistant to high temperature and durable. The woven bag coating process provided in the invention adopts a high-efficiency continuous production technology; and by optimizing control parameters of a processing process, the continuous production can be realized, and the production efficiency can be improved.

Description

technical field [0001] The invention relates to the field of plastic woven bags, in particular to an internal direct coating process of a composite plastic woven bag and a preparation method thereof. Background technique [0002] Most of the plastic woven bags on the market now use polypropylene as raw material, and polypropylene is the fastest growing major thermoplastic, especially in fiber and filament, film extrusion, injection molding processing, etc. Polypropylene's excellent flow properties and wide range of flow rates, combined with other unique polymer properties, give it excellent processability. [0003] Recently, in the coating production of plastic woven bags, special coating materials for copolymerization or special coating materials produced by homopolypropylene powder are generally used. The cost is high and the energy consumption is high. The quality is unstable due to different batches, which makes the coating process fluctuate greatly in the production pr...

AI Technical Summary

Problems solved by technology

[0003] Recently, in the coating production of plastic woven bags, special coating materials for copolymerization or special coating materials produced by homopolypropylene powder are generally used. The cost is high and the energy consumption is high. The quality is unstable due to different batches, which makes the coating process fluctuate greatly in the production process of composite plastic woven bags, the production conditions are unstable, and the defective products are high.