A low-temperature continuous regeneration device and process method for waste rubber

Abstract

The invention relates to a waste rubber low-temperature continuous regeneration device and a process method. The device includes an internal mixer, a double-screw extruder and an open mill which are connected in order; a discharge port of the internal mixer is connected with a feed port of the double-screw extruder, a discharge port of the double-screw extruder is provided with a conveying belt for conveying a rubber material, and the tail end of the conveying belt is provided with the open mill. The process comprises the steps: (1) crushing and uncoupling: adding a waste rubber powder into the internal mixer, controlling the rotor rotation speed at 30-40 rpm, carrying out internal mixing for 1.5-2 minutes, adding a regenerant and an additive, controlling the rotor rotation speed at 40-50 rpm, and mixing for 1.5-2 minutes; (2) uncoupling and kneading: conveying the rubber powder to the double-screw extruder, controlling the screw rotation speed at 30-50 rpm, and carrying out enhanced shearing uncoupling; (3) conveying; and (4) refining. The device and the method have the beneficial effects of simple production process, high production efficiency, and relatively high mechanical properties of the regeneration rubber, and the whole process is at low temperatures and has no pollution.

Description

technical field [0001] The invention belongs to the field of waste rubber recovery and reuse, and in particular relates to a low-temperature continuous regeneration device for waste rubber and a process method for preparing film by using the device. Background technique [0002] At present, in my country's reclaimed rubber industry, "high temperature and high pressure dynamic desulfurization" is the main desulfurization regeneration process. In this method, the penetration of regenerant into waste rubber is completed at high temperature and high pressure for a long time, which not only consumes high energy, but also has serious safety hazards. And the long-term high-temperature reaction increases the probability of the main chain breaking, and the performance of the reclaimed rubber is average. [0003] In the Chinese patent literature, the invention patent application with the publication number CN10251335 and the name "New Process for Continuous Reduction and Regeneration o...

AI Technical Summary

Problems solved by technology

However, the above-mentioned process is complex and needs to be desulfurized after heating and cooling. The desulfurization effect is general and the production efficiency is low; the complex process increases the production and operation costs.

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