A kind of foaming regenerated environment-friendly plastic sheet and its preparation method

Abstract

The invention relates to a foaming regeneration environment-friendly plastic sheet. The foaming regeneration environment-friendly plastic sheet comprises a PS base material layer and a foaming layer, wherein the PS base material layer comprises the following raw materials in percentage by weight: 75%-90% of PS, 5%-20% of PE and 1%-20% of a reinforcing agent; the foaming layer comprises the following raw materials in percentage by weight: 60%-70% of PS, 5%-20% of PE, 0.1%-20% of a foaming agent, 1%-10% of a reinforcing agent and 0.1%-8% of toner. A preparation method of the foaming regeneration environment-friendly plastic sheet comprises the following steps: (1) mixing the raw materials of the PS base material layer and the raw materials of the foaming layer in the ratio, and uniformly stirring; (2) feeding the raw materials into co-extrusion equipment through feeding equipment, extruding the PS base material layer and a foaming raw material layer, heating for forming in a double screw extruder, and simultaneously carrying out flow thermal compounding on the foaming layer and the PS base material layer at a joint of extruder screws to discharge sheets with uniform thickness, wherein the foaming raw material layer is foamed to obtain the foaming layer; and (3) drawing the PS base material layer and foaming layer composite sheets to a three-roller cooler for regulating flatness of the sheets, and trimming, forming and rolling through a tractor so as to obtain the finished product. The foaming regeneration environment-friendly plastic sheet provided by the invention has the advantages that the problem that the specific gravity of a traditional PS regeneration sheet is too large is solved, the cost is greatly reduced, and the environment pollution caused by plastics is alleviated.

Description

[technical field] [0001] The invention relates to the technical field of plastic sheets, in particular to a foamed recycled environmentally friendly plastic sheet and a preparation method. [Background technique] [0002] PS sheet is an environmentally friendly packaging material developed in recent years. It has good thermoforming performance, impact resistance, environmental protection performance and hygienic performance. It is widely used in blister packaging products such as medicine, food, toys and electronics. Among them, PS recycled sheet material recycles and reuses plastics to a large extent, reducing the pollution of plastics to the environment. But at present, according to the traditional production process of PS recycled sheet, its proportion is very heavy, resulting in the disadvantage of high cost. [Content of the invention] [0003] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a foamed recycled environmentall...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a foamed recycled environmentally friendly plastic sheet and its preparation method, which reduces the proportion of PE.PS recycled sheets and solves the problem of excessive specific gravity of traditional PS recycled sheets. Greatly reduce the cost and reduce the pollution of plastic to the environment