The quality of reclaimed rubber products is closely related to the raw materials used in reclaimed rubber. The reclaimed rubber products produced by high-quality waste rubber products are closer to all kinds of raw gums and can replace more raw gums to produce rubber products, significantly reducing the cost of raw materials. In addition, the good or bad desulfurization in the reclaimed rubber production process also directly affects the quality of the reclaimed rubber products. The vulcanizing agent, activator and softener are mainly used in the desulfurization process. Different types of compounded agents have different performances on the reclaimed rubber The same impact and all play an important role.
1, water: strictly speaking, water is not a chemical additive, is a kind of non-toxic, colorless, odorless inorganic substance composed of hydrogen and oxygen. It is the source of human life, Plastic desulfurization process also has an irreplaceable role, let us put together to discuss. Under normal temperature and pressure conditions, the water is a colorless, odorless transparent liquid, heat transfer medium, sublimated in water vapor, the pressure can be evenly desulfurization tank to ensure uniform heating of the desulfurization process, a variety of complexing agent evenly dispersed ; Also can prevent reclaimed rubber and air contact too much, to avoid bubbles, to ensure that the surface of the reclaimed rubber products produced uniform. Water content is too high will lead to the regeneration of the desulfurization of the accelerator clumps, so the amount of water must be appropriate.
2, the curing agent can make the rubber molecular chain cross-linking reaction, making the linear molecules form a three-dimensional structure of the site, reduce the plasticity of waste rubber products, increase flexibility, so that loss of use value of waste rubber products with new use value, Desulfurization essential chemical additives. Common reclaimed rubber vulcanizing agent is sulfur, vulcanization also comes from this.
3, activator: activator role is the cross-link fracture, with the cracking of free radicals generated by the vulcanizate to prevent the fracture of the molecular chain of rubber recombination and shorten the regeneration time; such as activator 980, is a highly efficient environmental protection Activator to reduce the viscosity of the reclaimed rubber and improve the tensile strength and elongation at break of the reclaimed rubber. It is mainly used for the production of environment-friendly reclaimed rubber, such as environmentally friendly latex reclaimed rubber and environmentally friendly tire reclaimed rubber.
4, softener: desulfurization softener can reduce power consumption and promote the uniform dispersion of various excipients to improve the rubber elongation, resilience; such as rosin, can increase the viscosity of rubber to improve the physical properties of recycled rubber , Commonly used in tire reclaimed rubber production.
5, Filler: The most common filler is calcium carbonate, added in the regeneration of plastic desulfurization process of calcium carbonate, can be used as a filler, reduce costs; improve the reclaimed rubber processing performance, increase rubber operability; calcium carbonate can also be prevented Crumb rubber group. General cheap plastic reclaimed calcium carbonate in a larger amount.
Recycled plastic desulfurization process to complete the situation and the performance of reclaimed rubber and subsequent processing of recycled rubber products have a great impact, in particular, some high content of plastic or environmentally friendly, tasteless reclaimed rubber products have special requirements, desulfurization process from chemical additives The choice of feeding time must be strictly in accordance with the formulation of the formula to ensure that the production of recycled plastic to meet the requirements.
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