Method for one-time low-temperature preparation of regenerated rubber

Abstract

The invention relates to a method for one-time low-temperature preparation of regenerated rubber, and belongs to the technical field of rubber regeneration. According to the method, vulcanized rubber powder, an auxiliary and a plasticizer are added into a high-shear internal mixer, regenerated rubber sheets are discharged after internal mixing, and the internal mixing temperature is kept at 60-90 DEG C; a double-auger feeding mechanism is connected to the outer end of a feeding port of the internal mixer, and thus the material conveying uniformity and efficiency are improved; four rotors are horizontally arranged in an internal mixing chamber and distributed in a rectangular mode, and thus the material shearing strength, material squeezing strength and material twisting strength are improved by multiple times; since the working end face of an upper ejection bolt and the working end faces of pressing heads are wavy, the physical performance of materials can be improved rapidly, it is guaranteed that the low-temperature kneading process is not affected, and even the operating efficiency of the whole internal mixer is improved. The method for one-time low-temperature preparation of regenerated rubber has the advantage that the external environment is not affected during low-temperature preparation, and the low-temperature internal mixing efficiency and the quality of regenerated rubber can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of rubber regeneration, and in particular relates to a method for preparing regenerated rubber at one time at low temperature. Background technique [0002] Regenerated rubber is processed from the vulcanized waste materials in the production of rubber products. It has a certain degree of plasticity and can be reused. Regenerated rubber can partially replace raw rubber for rubber products, which can save raw rubber and carbon. Black is also beneficial to improve processing performance and certain properties of rubber products. [0003] The regeneration process is a process in which waste rubber breaks part of the molecular chains and cross-linking points of vulcanized rubber under the combined action of plasticizers (softeners and activators), oxygen, heat and mechanical shear. Existing regeneration methods include both high-temperature regeneration and low-temperature regeneration. High-temperature regener...

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Problems solved by technology

Existing regeneration methods include both high-temperature regeneration and low-temperature regeneration. High-temperature regeneration is mainly produced by internal mixer, and desulfurized rubber powder is used in high-temperature regeneration, which requires a pre-desulfurization process for waste rubber, and the production efficiency is low. It will also cause external environmental pollution, and vulcanized rubber powder is directly used in low-temperature regeneration, which simplifies the process and does not cause pollution to the outside world. However, the low-temperature regeneration method does not have a special internal mixer and requires multiple processes to complete low-temperature preparation. Long, inefficient, and low-quality final product, so there is a need for improvements to existing methods of reclaiming rubber

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