A plastic extrusion composite film auxiliary machine and its method for manufacturing composite plastic woven cloth

Abstract

The invention discloses a plastic extrusion composite film auxiliary machine and a method for manufacturing a composite plastic woven fabric by the same. The machine comprises a double-station feeder, a heat treatment device, a film coating composite device, a cooling molding device and a winding device, wherein a correction device is arranged between the double-station feeder and the heat treatment device. The method comprises the following steps: first, feeding a plastic woven fabric by the double-station feeder, and regulating the position of the plastic woven fabric by virtue of the correction device; second, feeding the plastic woven fabric into the heat treatment device, heating by the heat treatment device, and feeding into the film coating composite device; third, embossing and flattening by virtue of a embossing and flattening device; and fourth, cooling and molding the composite plastic woven fabric by virtue of the cooling molding device, and trimming and winding the composite plastic woven fabric by virtue of the winding device. According to the plastic extrusion composite film auxiliary machine, the problem of high hot-shrinkage rate of the composite plastic woven fabric can be radically solved, and the flat degree of the fabric surface can be improved.

Description

technical field [0001] The invention specifically relates to a plastic extruding composite film auxiliary machine and a method for manufacturing composite plastic woven cloth, belonging to the technical field of plastic product processing. Background technique [0002] Composite plastic woven fabrics have been produced in China for decades, and the raw materials used are mainly polypropylene, polyethylene and ethylene-vinyl acetate copolymer. Its production process and technology are very mature. Its production process is that polypropylene or low-pressure polyethylene is extruded into a film on a wire drawing machine, cut into flat wires with dense blades, heated, stretched, heat-treated and shaped, and wound into wires. ingot. The flat yarn is woven into a plastic woven cloth by a circular loom, a water loom or a projectile loom, and then coated with polypropylene or high-pressure polypropylene on one or both sides of the plastic woven cloth by a plastic extrusion compoun...

AI Technical Summary

Problems solved by technology

During the development process, it was found that the composite plastic woven fabric produced by traditional production equipment and processes has the following disadvantages: high thermal shrinkage rate, poor surface flatness

When exposed to the sun or heat-processed, the composite plastic woven fabric will be deformed, wrinkled or have an uneven surface, or become smaller in size due to shrinkage, which makes it difficult to meet the performance requirements of the new application field.

The main reasons for the high thermal shrinkage rate and poor surface leveling of the composite plastic woven fabric are the lack of traditional equipment and technology and the characteristics of the woven fabric itself in the production process of the composite plastic woven fabric (ie, wire drawing, weaving, and compounding).

For example, the heat setting treatment device in the process of producing flat yarn in the traditional wire drawing machine is too simple, resulting in uneven and insufficient heating and cooling of the flat yarn during the heat setting treatment process, inconsistent molecular orientation and crystallization of the polymer chain of the flat yarn, and internal stress Insufficient elimination, resulting in high and uneven thermal shrinkage of the flat yarn; the warp let-off device of the weaving loom cannot ensure consistent warp tension; the above two reasons result in high and uneven thermal shrinkage of plastic woven fabrics

Since most of the plastic woven fabrics are weaved in a cross-shaped warp and weft, there are gaps between the flat filaments, resulting in uneven cloth surface after compounding.

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