Method for preparing light PET composite foam material by utilizing melt-blowing technology

Abstract

The invention discloses a method for preparing a light PET composite foaming material by utilizing a melt-blowing technology. The method comprises the steps: proportioning; respectively weighing PET resin, SG-2 polyvinyl chloride resin, wood flour, ethylene propylene diene monomer, hydroxymethyl cellulose, polylactic acid, a nucleating agent, a dispersing agent, a flame retardant and a foaming agent; modifying the raw materials; putting PET resin, SG-2 polyvinyl chloride resin, wood flour, ethylene propylene diene monomer, hydroxymethyl cellulose and polylactic acid into a reaction kettle fora heating reaction, then adding the nucleating agent, the dispersing agent, the flame retardant and the foaming agent for a continuous reaction, and thus obtaining modified raw material slices; carrying out melting treatment; slicing, melting and blending the modified raw materials, and putting into a reaction kettle for heating reaction to obtain a melt-blown material; carrying out melt-blow molding; and placing the melt-blown material in a melt-blown screw extruder, and carrying out melt-blown molding to obtain the light PET composite material which is excellent in performance and suitable for large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of composite foaming materials, in particular to a method for preparing lightweight PET composite foaming materials by utilizing melt blown technology. Background technique [0002] PET foam material has the unique advantages of low density, high strength, low water absorption, and good sound insulation and heat insulation performance. As a structural foam material, it can significantly increase strength and stiffness without increasing weight; PETPET foam material is mainly used for fiber, A small amount is used in film and engineering plastics; PET fiber is mainly used in the textile industry. PET film is mainly used for electrical insulation materials, such as capacitors, cable insulation, printed circuit wiring substrates, electrode slot insulation, etc. Another application field of PET film is film base and base tape, such as movie film, X-ray film, audio tape, electronic computer tape, etc. PET films...

AI Technical Summary

Problems solved by technology

[0003] The PET foam material obtained by conventional methods has low molecular weight, narrow molecular weight distribution, very low melt viscosity and strength, and it is difficult to withstand the tensile stress when the bubbles grow during the foaming process, and it is easy to cause cell rupture, collapse, and merger; At the same time, conventional PET is easily degraded during the molding process at a temperature higher than the melting point, and the crystallization rate is low. In the prior art, there has not been a process for preparing lightweight PET composite foam materials using meltblown technology.

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