In modern industrial production, rubber roller is an important mechanical part, and its performance directly affects production efficiency and product quality. Nitrile reclaimed rubber is an ideal raw material to replace high-priced nitrile rubber, with excellent oil resistance, chemical corrosion resistance, heat resistance and aging resistance, and can be used alone or combined with nitrile rubber to produce rubber rollers, effectively reducing the cost of raw materials. When using nitrile reclaimed rubber to produce rubber rollers, the selection and formulation design of nitrile reclaimed rubber are particularly important.
1. The selection of nitrile reclaimed rubber for rubber rollers
Nitrile reclaimed rubber is a recycled rubber made by recycling nitrile waste and processing through crushing, desulfurization and other processes. When choosing nitrile reclaimed rubber for rubber rollers, it is necessary to consider its oil resistance, wear resistance and aging resistance to meet the needs of rubber rollers in a specific working environment. Nitrile reclaimed rubber with similar physical properties of rubber rollers was selected, and the mixing ratio of reclaimed rubber was reasonably determined. It is recommended to choose nitrile reclaimed rubber with stable quality and sufficient supply to ensure the quality of nitrile rubber rollers mixed with reclaimed rubber to avoid a series of problems caused by the shortage of reclaimed rubber in subsequent production.
When designing the formula, in addition to nitrile reclaimed rubber, it is also necessary to add an appropriate amount of auxiliary materials such as softeners, reinforcing agents, and vulcanization systems.
2. Key points of the formula design of rubber rollers for the production of nitrile reclaimed rubber
(1) Vulcanization system: Vulcanization system is an important part to ensure that the rubber roller has good elasticity and durability. Nitrile reclaimed rubber, nitrile rubber/nitrile reclaimed rubber are used together to produce rubber rollers, and sulfur is generally used with accelerator DM or accelerator TS when producing rubber rollers.
(2) Reinforcing filling system: reinforcing agent is the main rubber additive to improve the wear resistance and strength of rubber rollers, and it is recommended to use fine particle furnace black, easy-to-operate groove black, semi-reinforcing furnace black, etc. in the formula of nitrile reclaimed rubber roller, which significantly improves the physical and mechanical properties of reclaimed rubber vulcanized rubber.
(3) Softening system: the softener in the formula of nitrile reclaimed rubber roller can play a role in improving the processing performance of rubber and reducing the hardness, and the commonly used softeners are coumaron resin, pine tar, modified resin, etc.; Adding 5-10 parts of liquid nitrile rubber to the nitrile reclaimed rubber formulation can improve the calendering operation and increase the viscosity of the compound.
3. Key points of the production process of nitrile reclaimed rubber production rubber rollers
When using nitrile reclaimed rubber to produce rubber rollers, it is first necessary to pretreat the nitrile reclaimed rubber, such as cleaning, drying, etc.; Then, according to the specific requirements of the rubber roller, add an appropriate amount of compounding agent, such as vulcanizing agent, accelerator, reinforcing agent, etc. Next, the mixed compound is mixed to make it evenly dispersed. The compounded rubber can be molded into the shape of a rubber roller by extrusion, calendering and other processes. Finally, the formed rubber roller is vulcanized to improve its physical properties and chemical stability.
Mixing is the process of homogeneous mixing of nitrile reclaimed rubber with various auxiliary materials, and the temperature and time should be strictly controlled during the mixing process to avoid excessive thermal decomposition or lack of sulfur of the material. The uniformity and continuity of the rubber material should be ensured during calendering; When forming, the shape and size of the rubber roller need to be precisely controlled; The vulcanization process is a critical step in imparting the final performance of the rubber roller, and the vulcanization temperature and time should be adjusted according to the specific requirements of the rubber roller.
The appropriate use of nitrile reclaimed rubber can produce low-cost, high-performance rubber rollers; Reasonable design of the formula, strict control of the production process parameters of each link, can produce rubber roller products that meet different industrial needs. With the continuous progress and innovation of reclaimed rubber technology, the application of nitrile reclaimed rubber in the production of rubber rollers will be more extensive, bringing more convenience and benefits to industrial production.
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