Technology for making high-filling modified parent particles of large-diameter high-density polytene corrugated tube

Abstract

The preparation process of high stuffing modified master batch for large caliber corrugated high-density polyethylene pipe relates to the technology of master batch for corrugated polyethylene pipe. Superfine calcium carbonate and superfine talcum powder are mixed to form composite powder, the composite powder is added into coupling agent at 120-140 deg.c for 5-10 min, white oil, stearic acid, hydroxyl silicon oil and polyethylene or polypropylene are added and mixed at 150-190 deg.c, and the mixture is extruded in parallel double screw extruder and pelletized to obtain the master batch. The modified master batch may be added into material for large caliber corrugated HDPE pipe in the amount up to 50 %, and the large caliber corrugated HDPE pipe has greatly raised bending modulus and other excellent performance.

Description

technical field [0001] The invention relates to masterbatch technology for making polyethylene bellows. Background technique [0002] Today, when protecting the environment and saving energy, the use of plastic double-wall corrugated pipes is in line with the country's development direction of replacing cement pipes, steel pipes, and cast iron pipes with plastic pipes. Widely used in drainage, sewage, farmland irrigation, etc. Compared with PE solid-wall pipe, HDPE double-wall corrugated pipe not only saves 30% of raw materials, but also according to the principle of mechanics, the thin-shell structure has strong rigidity, external compression resistance, and internal pressure of 0.6-0.7Mpa. Therefore, it has the advantages of light weight, corrosion resistance, good compression resistance, long life, easy installation and use, etc., and is very popular in the market. [0003] The diameter of domestically produced HDPE double-wall corrugated pipe is φ400~φ1400mm, which not...

AI Technical Summary

Problems solved by technology

After several experiments, the HDPE2480 produced by Qilu can meet its production and processing requirements, but the ring stiffness of the product cannot reach 8KN / m 2 , under the standard temperature (23±2℃) ring stiffness test value is 6.2KN / m 2 , which requires the modification of the material, and requires that under the premise of not reducing the performance of the original HDPE2480, that is, under the condition of ensuring the ring flexibility, low temperature impact resistance and notched impact strength of the product; improving the flexural modulus of the material to ensure the product Stiffness grade requirements