The whole hose is generally processed with natural rubber as the main raw material, with only one layer of rubber layer, the pipe body is soft, and the production process is simple, which is mainly used for transporting water, air, low-pressure liquid and other media at room temperature and pressure. When using natural rubber to produce colored pure rubber hoses, the appropriate use of natural latex reclaimed rubber can effectively reduce the cost of raw materials while maintaining the performance of the hose. So what latex reclaimed rubber is suitable for the production of color full hoses? How much latex reclaimed rubber is appropriate? How to design the vulcanization formula of color hose containing latex reclaimed rubber?
1. Key points of formula design of color full hose mixed with latex reclaimed rubber
The color all-rubber hose is required to have certain tensile strength, tear strength and abrasion resistance, and maintain good compression, bending resistance and durability during use; It has a certain resistance to hot oxygen, ozone and ultraviolet rays, and prolongs the service life of the hose E5LYY226; The appearance is required to be bright and uniform, light-resistant, heat-resistant, and not easy to change color and migrate; The rubber compound for color hose has good extrusion, molding and vulcanization properties, and is suitable for continuous production process; The color full hose with environmental protection requirements requires the rubber materials used to meet the relevant environmental protection standards.
(1) Raw material option: natural rubber can be combined with latex reclaimed rubber in an appropriate proportion to produce colored full hoses, or part of styrene-butadiene rubber can be used, and some products can be completely used with latex reclaimed rubber. White latex reclaimed rubber is mostly used for color pure rubber hoses, which are light in color, easy to match color, and not easy to change color.
Hongyun high-strength pure latex reclaimed rubber takes waste condoms as the main raw material and adds part of the landed natural rubber in the production process, which is made by crushing, desulfurization, disinfection, drying, filtration and other processes, and the effective rubber hydrocarbon content reaches more than 75%, with high strength, small specific gravity, good elasticity, easy color matching, high fineness, environmental protection and tastelessness, high tearing elongation, simple refining process and saving labor and electricity costs, etc., which can be used alone or combined with natural rubber to produce color full rubber hoses to reduce costs.
(2) Design of reinforcing filling system: The color full hose containing latex reclaimed rubber mostly uses activated calcium carbonate, which has the functions of reinforcement, filling and color matching; Appropriate use of talcum powder, clay, etc., to improve the performance of rubber processing technology, and further reduce costs.
(3) Vulcanization system design: when using latex reclaimed rubber alone or natural rubber/latex reclaimed rubber to produce color full hoses, choose sulfur-accelerator system, use accelerator DM, TMTD, etc. with sulfur, vulcanization speed is moderate, and it is not easy to spray frost; For color hoses with high surface quality requirements and high natural rubber consumption, a sulfur-free vulcanization system can be used to avoid frosting.
(4) Colorants and antioxidants option skills: a small amount of titanium dioxide can be used in the production of color full hoses to improve color brightness and hiding power, and excessive dosage increases costs; Mix with other inorganic colorants or organic pigments in the right color, such as iron oxide red, ultramarine, chrome yellow, etc. It is recommended to use non-polluting antioxidants to prolong the service life and prevent the hose from changing color or migrating during use.
2. Vulcanization formula of color full hose containing latex reclaimed rubber
70 parts of natural rubber, 30 parts of high-strength pure latex reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant 425, 37 parts of activated calcium carbonate, 5 parts of titanium dioxide, 1 part of accelerator DM, 0.25 parts of accelerator TMTD, 1.5 parts of sulfur, 0.75 parts of colorant; Total 152.5 copies.
Compared with natural rubber, latex reclaimed rubber has low price, high plasticity, good fluidity, low mixing power consumption, small expansion and contraction of unvulcanized rubber, less processing heat, and less vulcanization reversion; When using latex reclaimed rubber instead of natural rubber to produce colored hoses, rubber product manufacturers must reasonably design the rubber product formula, appropriately adjust the production process parameters, and have the opportunity to continue to discuss relevant issues with you.
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