Can rubber waterproofing membranes use recycled glue? The answer is yes. Recycled rubber is made of waste vulcanized rubber as raw material, made of crushing, desulfurization, refining and other processes, with certain plasticity and viscosity, can be processed and re-vulcanized, can be used alone or in combination with the original rubber to produce rubber waterproof membrane to reduce costs. There are many types of recycled rubber, which recycled rubber can produce waterproof membranes? How to design the formula of waterproof membrane for the production of recycled glue?
1. Which recycled rubber can produce rubber waterproof membrane
Common recycled rubbers on the market include latex recycled rubber, tire recycled rubber, EPDM recycled rubber, nitrile recycled rubber, and butyl recycled rubber. Rubber waterproof membrane has high strength, good elongation, tear resistance, aging resistance E5LYY912 and other performance characteristics, and is generally processed from neoprene, butyl rubber, EPDM and other raw materials. EPDM recycled rubber and butyl recycled rubber can replace the appropriate proportion of raw rubber to produce waterproof membranes and reduce costs. Some waterproof membranes can also use tire recycled glue to reduce more raw material costs.
2. Key points of the formula design of waterproof membrane for the production of recycled glue
(1) Recycled rubber option skills
When using recycled rubber in the production of rubber waterproof membranes to reduce costs, it is necessary to choose the appropriate recycled rubber according to the performance requirements of the waterproof membrane.
(2) Design of vulcanization system of recycled rubber waterproof membrane
When recycled rubber is mixed with rubber waterproof membrane, the traditional sulfur vulcanization system can be used, and thiazole accelerators can be combined with sulfur to improve the vulcanization rate and physical properties. EPDM recycled rubber produces high-performance waterproof membranes, mostly using low-sulfur and high-promotion or peroxide vulcanization systems, and the waterproof membranes have a longer service life.
(3) Design of recycled rubber waterproof membrane reinforcement system
Recycled rubber waterproof membrane can be reinforced with carbon black, high wear-resistant carbon black such as N330, to improve the mechanical strength and wear resistance of the waterproof membrane; Lightweight calcium carbonate, talcum powder and other fillers to further reduce costs.
(4) Design of recycled rubber waterproof membrane softening system
The appropriate use of paraffin oil, naphthenic oil and other softeners in the formula of recycled rubber waterproof membrane can improve the flexibility of the rubber material, and it is recommended to use oils with low volatile content and high aniline point for EPDM recycled rubber waterproof membrane.
3. Recycled rubber production of waterproof membrane vulcanization reference formula
(1) EPDM recycled rubber production waterproof membrane formula: EPDM recycled rubber 100 parts, zinc oxide 3.5 parts, stearic acid 0.7 parts, carbon black N550 70 parts, heavy calcium 50 parts, paraffin oil 30 parts, tackification resin 3.5 parts, accelerator BZ 0.6 parts, accelerator CZ 1.4 parts, accelerator TMTD 0.3 parts, sulfur 0.7 parts; Total: 260.7 copies.
(2) Formula of waterproof membrane for the production of butyl recycled rubber: 100 parts of butyl recycled rubber, 5 parts of zinc oxide, 3 parts of stearic acid, 2 parts of anti-aging agent, 20 parts of carbon black, 80 parts of talc, 20 parts of engine oil, 2 parts of accelerator M, 1 part of accelerator TMTD, 1 part of accelerator PX, 1 part of accelerator NC, 2 parts of sulfur; A total of 237 copies.
(3) Formula of waterproof membrane for the production of tire recycled glue: 100 parts of tire recycled glue, 1.2 parts of zinc oxide, 0.2 parts of stearic acid, 0.2 parts of anti-aging agent D, 25 parts of terracotta, 3.7 parts of engine oil, 0.5 parts of accelerator DM, 1.2 parts of sulfur; Total: 132 copies.
When using recycled rubber in rubber waterproofing membranes to reduce costs, it is necessary to balance performance, cost and process, and we will continue to share with you the key points of the production process of waterproof membranes with recycled glue in the future.
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