Latex reclaimed rubber is made from waste natural rubber, waste latex, and their products, retaining the basic properties of natural rubber. It can replace some natural rubber in producing various rubber products, effectively reducing raw material costs. Air rubber hoses are mainly used to transport compressed air or inert gases, and are generally made from natural rubber or synthetic rubber as raw materials. Can latex reclaimed rubber replace natural rubber in producing air rubber hoses?
1. Which parts of the air hose can be mixed with latex reclaimed rubber?
Whether latex reclaimed rubber can be used in air hose production mainly depends on the working pressure and structure of the hose. Ordinary low-pressure air hoses can be mixed with latex reclaimed rubber in either the inner or outer rubber layer, or combined with natural rubber to reduce costs; Air hoses with medium and high pressure, fabric reinforcement, and pulse pressure require high strength, airtightness, and durability. When adding latex reclaimed rubber, the amount must be controlled and pipe verification conducted.
2. Tips for choosing latex reclaimed rubber at different parts of air rubber hoses
Latex reclaimed rubber has certain elasticity and plasticity, is compatible with natural rubber, and is often used together with natural rubber to produce the inner and outer layers of air rubber hoses.
The inner layer of rubber in air rubber hoses is responsible for air delivery and airtightness, requiring high standards for the compound's airtightness and adaptability to different media. Ordinary low-pressure air hoses can be appropriately blended with latex reclaimed rubber. When choosing reclaimed rubber E6LYY724 focus on impurity content, filtration quality, and compound density. The outer layer of rubber on air rubber tubes needs to withstand external wear, sunlight, oil stains, and repeated bending, requiring high wear resistance, weather resistance, and aging resistance. When using latex reclaimed rubber to reduce costs, it is recommended to choose latex reclaimed rubber with high rubber content, as it offers better physical and mechanical properties.
3. The proportion of latex reclaimed rubber mixed into air hoses
When reducing costs by mixing latex reclaimed rubber into air hoses, the proportion of reclaimed rubber should be determined according to the specific requirements of the hose. Low-pressure ordinary hoses can use a higher proportion of latex reclaimed rubber, while some products may use only latex reclaimed rubber instead of natural rubber; For medium and high-pressure or cloth-filled rubber hoses, it is recommended to use natural rubber or other raw rubber as the main material, and adjust the latex reclaimed rubber from a lower ratio to avoid affecting the pressure safety of the entire pipe.
Air hoses can first be mixed with latex reclaimed rubber at 10%–30% of the total rubber material, then adjusted according to tensile strength, elongation, hardness, and airtightness. It is not advisable to blindly increase the proportion just to reduce costs. The quality of latex reclaimed rubber, the grade of the base rubber, and the degree of vulcanization all affect the processing and performance of air rubber hoses; there is no universal maximum dosage.
4. Key points of the air hose mixing and extrusion process for latex reclaimed rubber production
When using latex reclaimed rubber to produce air hoses, hot smelting can be done before mixing to ensure uniform softening of the compound compound; Rubber temperature should be controlled below 130°C; Sulfur and accelerators should be added after filtration to reduce filter clogging and loss of vulcanization system components. During air hose extrusion, continuous feed should be maintained, with barrel temperature, screw speed, and head pressure controlled to ensure uniform pipe wall thickness; Cloth rubber tubing should also be checked for fiber skeleton fit and interlayer bonding.
When latex reclaimed rubber replaces some natural rubber in producing different parts of air hoses, manufacturers need to choose latex reclaimed rubber with appropriate specifications based on the operating pressure, structural form, and specific requirements of different parts of the hose, especially the tensile strength, Mooney viscosity, fineness, and other indicators of reclaimed rubber, while appropriately adjusting the mixing and extrusion processes. Air hoses should reasonably blend latex reclaimed rubber while balancing airtightness, strength, and aging resistance, reducing production costs while ensuring long-term safety and stability of air hoses.
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