A common extruder extrudes TPE material and method for foaming floating cables

Abstract

The invention relates to a TPE (Thermoplastic Elastomer) material for a foamed floating cable extruded by a common extruder and a method. According to the technical scheme, the TPE material comprises at least one of ultra-high molecular weight SEBS and ultra-high molecular weight SEEPS, 10-100 parts of long chain branch olefin polymers, 20-50 parts of white oil, 20-160 parts of reinforced resins, 5-30 parts of maleic anhydride grafted polypropylene, 5-30 parts of nano-clay, 10-40 parts of aids, and 20-200 parts of a TPE base material foamed water master batch. The material has the beneficial effects that by utilizing the low temperature sensitive and strain hardening phenomena of long chain branch olefin polymers and the characteristics of low melt viscosity and high melt strength of ultra-high molecular weight elastomers, the foamed melt has good foam structure stability at a certain temperature, the dependence on equipment and processing parameters is reduced, the product processing stability is improved, and the production cost is reduced; and moreover, foaming extrusion of the common extruder can be realized, the foaming agent is uniformly dispersed, the foaming process is stable, foam is uniform and dense, and the foamed product is fine, smooth and soft in surface, high in strength and high in weather resistance.

Description

technical field [0001] The invention relates to the technical field of production and processing of polymer modified materials, in particular to a TPE material and method for extruding foamed floating cables with ordinary extruders. Background technique [0002] Thermoplastic elastomer TPE is a promising elastomer material. It has the same elasticity, recovery, toughness and weather resistance as traditional rubber, and at the same time has the ease of processing of plastics and can be recycled. The hardness of the material is widely adjustable. , used to make foaming products, the hardness range of the foamed product can be 5C-60C, the specific gravity is extremely low, the lowest can reach 0.08-0.3, the foaming product has the same touch as CR, SBR or PU, and there is no need to worry about odor or frost. The troubles of foaming products are high physical properties, strong dimensional stability and high coloring rate. Therefore, the application advantages of TPE as foamin...

AI Technical Summary

Problems solved by technology

However, due to the sharp change in the melt properties of the TPE material after passing through the extruder, it requires high equipment and process requirements to obtain a good foaming effect, and even needs to add auxiliary equipment to meet the foaming requirements, and the production and processing costs are relatively high; The one-time foaming effect, foaming temperature and TPE processing technology are not uniform. The foaming agent needs to be mixed for one-time use. The degree of dispersion of the foaming agent seriously affects the foaming effect and stability of TPE products. Domestic existing manufacturers It is hoped that the foaming agent dispersion problem can be solved by producing foaming masterbatches, but the masterbatches produced have a series of problems such as reduced foaming agent activity, poor compatibility between the masterbatch base material and TPE, etc.