A kind of fish starch modified polylactic acid monofilament and preparation method thereof

Abstract

The invention discloses a starch-modified polylactate monofilament for a fishing net. The monofilament is characterized by comprising the following components in parts by weight: 100 parts of polylactic acid, 1-5 parts of starch, 1-5 parts of nanometer white carbon black and 0.1-0.5 part of antioxygen 1010. The starch-modified polylactate monofilament for the fishing net can be prepared by sequentially performing high-speed kneading, extrusion pelleting, melt spinning and stretching on the corresponding materials. The invention also discloses a preparation method of the starch-modified polylactate monofilament for the fishing net. According to the method provided by the invention, improved toughening modification is performed on the polylactic acid matrix by using the starch, the nanometer white carbon black and the antioxygen 1010, and thus breaking strength and knot strength of the monofilament are effectively improved. The preparation process is also controlled via parameters such as time, temperature and stretching times, influence of the preparation process on the breaking strength and knot strength of the monofilament is reduced, and the condition that the produced monofilament is good in spinnability and comprehensive performance is ensured, and the phenomenon of breaking wires does not occur in industrial production.

Description

technical field [0001] The invention belongs to the technical field of fishing net materials, in particular to a starch-modified polylactic acid monofilament for fishing and a preparation method thereof. Background technique [0002] Since most of the current fishing net materials are synthetic fibers such as polyethylene and polyamide, which are not easy to degrade in the natural environment, a large number of fishing nets lost or discarded by fishermen in the ocean are damaging the marine environment. These "ghost nets" affect fishery reserves, and Hazard to passing ships. These hazards are becoming increasingly serious with the development of global fisheries and the widespread use of fishing gear made of persistent materials. In order to solve this problem, the research and development of degradable fishing fiber materials in seawater has become a research hotspot in the field of fishery materials at home and abroad-fishing nets made of degradable materials, accompanied...

AI Technical Summary

Problems solved by technology

Polylactic acid fibers can be prepared by the traditional melt spinning process, but because the ester bonds on the polylactic acid macromolecular chains are easy to chemically hydrolyze and thermally degrade, the mechanical properties of polylactic acid fibers after spinning often cannot meet the requirements of practical applications. Requirements, for example, the breaking strength of conventional textile polylactic acid fiber is often lower than 3.0cN / dtex, and the knot strength is often lower than 2.0cN / dtex, while the fishing polylactic acid monofilament often has a higher breaking strength and knot strength. Therefore, it is urgent to improve the production formula of polylactic acid, strengthen and toughen the polylactic acid matrix, and develop a degradable polylactic acid monofilament for fishing with excellent comprehensive performance.

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