Production technology for chloroprene rubber

Abstract

Relating to the rubber field, the invention discloses a production technology for chloroprene rubber. The technology comprises the processes of: rubber drying, plastication, mixing, semi-finished product cutting and vulcanization. According to the method, by strictly controlling the rubber drying temperature and time in the rubber drying process, the quality of the dried rubber material is improved. The mixing process adopts a two-stage mixing process, well controls the mixing time and discharge temperature, so that scorching phenomenon of chloroprene rubber is significantly reduced, and the rubber guiding, discharge and batch-out of an open mill are smooth, and no roll sticking phenomenon appears. The vulcanization process adopts N-tert-butyl-2-bisbenzothiazole sulfenamide as a vulcanization accelerator, which is safe and pollution-free and has no harm to the human body. The technological process adopts a drum type vulcanizing machine, the vulcanization efficiency and quality are greatly improved, and the produced product has high Mooney viscosity and good quality. The technological method has the advantages of good technology, simple operation, and good technological stability, thus being suitable for factory automation production.

Description

technical field [0001] The invention relates to the rubber field, in particular to a neoprene production process. [0002] Background technique [0003] Neoprene has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, and chemical reagents. It is widely used in machinery, electric power and rubber industries. After years of development, China's neoprene rubber The production capacity of the company has reached 83,000 tons. With the new construction or expansion in the future, it has a good development prospect. Therefore, we should produce better quality neoprene products to serve the society. The application number is CN201110328366.8. A preparation method of a special type of neoprene, including basic processes such as mastication, mixing, calendering or extrusion, molding and vulcanization. Each process has different requirements for the product, and several auxilia...

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Problems solved by technology

[0003]Neoprene rubber has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, chemical reagent resistance, widely used in machinery After years of development, the production capacity of neoprene in China has reached 83,000 tons. With new construction or expansion in the future, it has a good development prospect. Therefore, we should produce neoprene with better quality. Rubber products serve the society, and the application number is CN201110328366.8, which discloses a preparation method of special neoprene rubber, including basic processes such as mastication, mixing, calendering or extrusion, molding and vulcanization, and each process is specific to the product. According to different requirements, a number of auxiliary operations are used respectively. In order to add various required compounding agents to the rubber, the raw rubber first needs to be masticated to improve its plasticity, and then carbon black and various rubber additives are mixed with the rubber by kneading. The rubber is uniformly mixed into a rubber material, which is extruded to form a blank of a certain shape, and then combined with a calendered or glued textile material (or with a metal material) to form a semi-finished product; finally vulcanized and Plastic semi-finished products are made into high-elastic final products, but the neoprene products produced by this process have low Mooney viscosity, high viscosity, poor manufacturability, difficult operation, and poor process stability, which is not suitable for factory automation. Production

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