Polymer alloy oxygen blocking material and preparation method as well as application thereof

Abstract

The invention discloses a polymer alloy oxygen blocking material, which is PO-LCP (Polyolefin-Liquid Crystal Polymer) alloy, wherein the alloy is prepared by melting and mixing the following components in percentage by weight: 95-15 percent of polyolefin resin, 4.9-84.3 percent of liquid crystal resin and 1-0.7 percent of compatibilizer. A preparation method comprises the following steps of: melting and plasticizing the LCP resin by an extruder by using a lateral feed two-section extrusion granulator; extruding melt of the resin into another extruder with a second feed port in the waist part in a duck-stuffing manner; converging the PO resin which is being melted, plasticized and extruded in the extruder with the compatibilizer melt; melting and mixing the three components; performing extrusion molding to form strips; and drawing, orientating, cooling and granulating to prepare PO-LCP alloy oxygen blocking material particles. The polymer alloy oxygen blocking material has wide application.

Description

technical field [0001] The present invention relates to a polymer alloy material, its preparation method and its use, in particular to a polymer alloy oxygen barrier material, its preparation method and its use. Background technique [0002] The oxygen permeability of most plastic pipes is relatively high. The disadvantage is that oxygen will penetrate through the pipe wall and dissolve into the medium conveyed in the pipe. The presence of oxygen in the medium will affect the metal pipes and metal equipment in the system. Accelerate oxidation and corrosion, increase the safety hazard of the system, shorten the service life of the system, pollute the transported medium, and provide breeding conditions for microorganisms in the medium. The higher the temperature of the medium, the more serious this disadvantage is, so the oxygen permeability rate of plastic pipes used in hot water systems is clearly stipulated in D1N4761, CJ / T175-2002 and other standards. [0003] In order to...

AI Technical Summary

Problems solved by technology

The oxygen barrier layer of the three-layer structure oxygen-barrier plastic pipe cannot be protected, and the structure of the five-layer structure oxygen-barrier plastic pipe is complicated, and the manufacturing cost of both is relatively high. The popularization and application are limited, and only a small amount of application is used in some high-end applications.

However, the processing temperature of LCP is very different from that of plastic pipes commonly used in hot and cold water devices. The thin molded products are brittle, and their compatibility with most PO resins is not good. The oxygen barrier layer has poor adhesion and must be bonded with an adhesive layer