Modified foaming method of thermoplastic foam

Abstract

The invention belongs to the technical field of novel materials, and particularly relates to a modified foaming method of thermoplastic foam plastics. The modified foaming method comprises the following steps: taking a pre-foamed thermo-plastic foam plastic material, cutting the pre-foamed thermo-plastic foam plastic material until the shape is consistent with that of a product to be produced; placing the cut thermo-plastic foam plastics into a mould with a heating function, mixing for 2-10 min; cooling and forming, and then taking a finished product out. The modified foaming method has the beneficial effects that the foaming density of the thermoplastic foam plastic material treated by adopting the modified foaming method is larger in density, and has a finer and more compact independent bubble structure; a compact surface layer is formed on the surface of the material so that the water resistance of the product is better, the steam moisture penetrability resistance is improved, the surface wear resistance, the corrosion resistance, the bacterium resistance and the ageing resistance are improved, the smell of a barrier material is emitted, the use environment is optimized, and the structure stability of a product is improved; in addition, the buffer, the sound insulation, the heat insulation and other performances of the foamed material can be improved.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a modified foaming method of thermoplastic foam. Background technique [0002] At present, there are three production processes of polyethylene foam plastics, namely pressurized primary foaming, continuous extrusion (or calendering) foaming at normal pressure, and pressurized-atmospheric secondary molding foaming. The characteristics of the three are different. same. Pressurized one-time molding foaming is rapid expansion foaming, the foaming ratio is not high, and the product wall is thin; normal pressure continuous extrusion (calendering) foaming can be continuously produced, the production capacity is large, the product thickness is thin, and the internal bubbles are large; -Normal pressure secondary foaming has a high expansion ratio, thick products, and small internal bubbles, but the structural properties of the product are average. Contents of the inve...

AI Technical Summary

Problems solved by technology

Pressurized one-time molding foaming is rapid expansion foaming, the foaming ratio is not high, and the product wall is thin; normal pressure continuous extrusion (calendering) foaming can be continuously produced, the production capacity is large, the product thickness is thin, and the internal bubbles are large; -Normal pressure secondary foaming has a high foaming ratio, thick product, and small internal bubbles, but the structure and performance of the product are average