Full-degradation paper imitation material and preparation method thereof

Abstract

The invention relates to a full-degradation paper imitation material and a preparation method thereof. The material mainly comprises biodegradable polylactic acid and starch; the preparation method of the paper imitation material comprises: the polylactic acid, the starch, ethylene acrylic acid copolymer, carboxymethyl cellulose and polycaprolactone are mixed together; then, other premixed reaction auxiliary agents are processed by blending; the obtained material is put into a cooling mixer to be cooled, and degraded master batch is obtained by discharging; after that, the degraded master batch is put into a double-screw extruder for fused cutting and plastified granulation, so that granules are obtained; and the needed full-degradation paper imitation material can be processed and prepared by sheet extrusion equipment, a film blowing device or flow-extend equipment. The paper imitation material is full-degradation material which is safe, nontoxic and lower in cost; the material also has simple preparation technique and good processing performance, so as to be taken as environment-friendly substitute product of parts of paper materials.

Description

technical field [0001] The invention relates to a fully degradable paper-like material and a preparation method thereof, in particular to a fully degradable paper-like material with polylactic acid plus starch as a base material and a preparation method thereof. Background technique [0002] The rapid development of the plastics industry not only enriches and improves people's lives, but also brings serious pollution to nature, which poses a severe challenge to the living environment of human beings. In particular, the wide application of disposable shopping bags has formed an increasingly serious "white pollution", which is constantly eroding the earth's ecology. With the increasing awareness of green environmental protection in the world, people have begun to regulate the use of plastic products, and countries around the world have also introduced relevant "plastic restriction" laws and regulations to deal with this environmental crisis. On the other hand, researchers are...

AI Technical Summary

Problems solved by technology

At present, there are several categories of degradable materials in a broad sense. One is degradable or hydrolyzed plastics, whose main components are natural decomposable substances such as starch, which are made after modification of traditional plastics. This substance has the same properties as the original resin. Similar physical and mechanical properties, and the price is comparable, but because it is only partially modified, it is actually incompletely degraded or partially degraded, and the original tree plastic components are not completely degraded, showing broken shape or reduced particle size

[0004] Another type of degradable material that has attracted widespread attention in recent years is aliphatic polyester or hydroxyester polymers and their blended components through biological fermentation or artificial synthesis, such as PCL, PLA, PBS, PHB, etc. The advantages of this type of degradable materials It can be completely degraded, but the disadvantage is that the cost is expensive, usually ten or even dozens of times that of ordinary plastics, and some physical parameters such as thermoplasticity and ductility are not as good as traditional resin materials, which limits its processing

[0005] There have been paper-like containers made of completely degradable natural cellulose materials on the market, but they have the disadvantages of poor performance and high cost, and their applications are limited

In addition, there are also paper-like materials processed from starch and plastics, which have better performance than paper-like materials processed from natural fiber materials, but their degradation is incomplete and the degradation time is slow.

At the same time, the traditional papermaking industry also has high energy consumption and heavy pollution, sometimes even more serious than the petrochemical polymer industry. Therefore, the above materials are not particularly ideal for paper-like substitutes.