Co-extrusion foaming board and preparation method thereof

Abstract

The invention relates to a preparation method of a co-extrusion foaming board. The preparation method comprises the following steps: after stirring and mixing acrylonitrile-butadiene-polystyrene copolymer resin, a foaming agent and a color master batch, melting and plasticizing an obtained mixed material by a first plastic extruding machine, and then extruding the mixed material into a first multiplier to obtain foaming layers; after stirring and mixing the acrylonitrile-butadiene-polystyrene copolymer resin and the color master batch, melting and plasticizing an obtained mixed material by a second plastic extruding machine, and then extruding the mixed material into a second multiplier to obtain non-foaming layers; simultaneously extruding the foaming layers and the non-foaming layers into a multi-layer multiplier to extrude to form a foaming board with a structure of 64-100 layers through the multi-layer multiplier, wherein the foaming layers and the non-foaming layers in the foaming board are alternatively arrayed; and after the obtained forming board with the structure of 64-100 layers is extruded through a T-shaped die head, rolling the obtained forming board with the structure of 64-100 layers through a pressing roll so as to form a co-extrusion foaming board of 64-100 layers. The foaming board prepared by the preparation method has the structure of 64-100 layers and also has the characteristics of high foaming degree and small specific gravity.

Description

technical field [0001] The invention relates to a foamed board, in particular to a co-extruded foamed board and a preparation method thereof. Background technique [0002] Foam material is a kind of polymer material which is more and more widely used. The biggest difference between it and solid solid materials is that it has a wider collapse platform during compression, so it can experience a large compressive strain under almost constant stress, which leads to its higher energy during compression It is widely used in the field of packaging protection due to its absorption capacity. The tortuous and connected pores in the foam material can change the straight-line propagation of sound, causing energy loss due to viscous flow. Many surfaces in the porous body can be relatively displaced in a short distance under the action of airflow pressure, and have good sound damping ability, which is an ideal anti-noise material. [0003] Acrylonitrile-butadiene-polystyrene copolymer ...

AI Technical Summary

Problems solved by technology

The problems of these boards are: either the degree of foaming is too high and cannot be used for subsequent processing; or the degree of foaming is very low, the specificity of the board is large, and the cost of raw materials in the production process is high