Preparation method of modified polyethylene particles based on carboxymethyl cellulose

Abstract

The invention discloses a preparation method of modified polyethylene particles based on carboxymethyl cellulose. By adding 8-hydroxyquinoline, copper chloride, dodecylbenzene sulfonic acid, water, sodium carbonate, ethanol and the like, the tensile strength of the prepared modified polyethylene particles is 59-81 MPa, the water vapor transmission rate is 0.2-0.6 g / m<2>*24 h*mm, and the oxygen index is 28-36%. An output shaft of a third motor drives a first connecting rod to rotate, the first connecting rod drives a first gear on the peripheral surface to rotate, the first gear is engaged to drive a second gear to rotate, the second gear drives a second connecting rod to rotate, the second connecting rod drives shaft pins on the two sides to rotate, the shaft pins drive a rotating rod to rotate, the rotating rod drives an upper shell to ascend and descend, then a material screening net vibrates and screens grain-sized diced mixture, and the technical problem that polyethylene particlescannot be directly screened after being extruded by extrusion equipment in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of polyethylene particle preparation, in particular to a method for preparing modified polyethylene particles based on carboxymethyl cellulose. Background technique [0002] Polyethylene has excellent low temperature resistance, can withstand most acid and alkali erosion, low water absorption, and electrical insulation. Polyethylene can be formed by extrusion, injection, molding, blow molding and melt spinning, and is widely used in insulation and sheathing of films, sheets, coatings, cling film, containers, sewage pipes, water pipes, wires, and cables . [0003] The patent document (201410178965.X) discloses a composite particle modified high-density polyethylene material and its preparation method. The modified high-density polyethylene material maintains the good formability, high surface quality and compact structure of high-density polyethylene. , high strength, high corrosion resistance, etc., but th...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of the modified polyethylene particle based on carboxymethyl cellulose, solve following technical problem: (1) by adding 8-hydroxyquinoline, cupric chloride, dodecylbenzene sulfonate The addition of acid, water, sodium carbonate, ethanol, etc., according to GB / T 19810-2005, the tensile strength of the modified polyethylene particles prepared is 59-81MPa, according to GB / T1037-1988, the water vapor transmission rate is measured 0.2-0.6g / m 2 .24h.mm, according to GB / T 24061-2008, the measured oxygen index is 28-36%, which solves the technical problems of insufficient tensile strength of polyethylene particles, low water vapor transmission rate and low oxygen index in the prior art; (2) Through the setting of the sprocket group, the first motor output shaft can drive the horizontal stirring rod to rotate while driving the extrusion screw, and through the setting of the first bevel gear and the second bevel gear, the horizontal stirring rod can be rotated At the same time, it can drive the vertical stirring rod to rotate, and carry out effective pre-stirring before the extrusion of the mixture E, so as to solve the problem that the polyethylene particles in the prior art are not extruded in the extrusion equipment without effective pre-stirring, resulting in low extrusion efficiency (3) The output shaft of the third motor drives the first connecting rod to rotate, the first connecting rod drives the first gear on the outer peripheral surface to rotate, the meshing of the first gear drives the second gear to rotate, and the second gear drives the second connecting rod to rotate. The rod rotates, the second connecting rod drives the shaft pins on both sides to rotate, the shaft pin drives the rotating rod to rotate, the rotating rod drives the upper housing to rise and fall, and the upper housing drives the spring on the spring rod to expand and contract periodically, and then the sieve net is able to adjust the pelletizing The final mixture is subjected to vibration screening, which solves the technical problem in the prior art that polyethylene particles cannot be directly screened after being extruded by the extrusion equipment

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