Reclaimed rubber production of cloth shoes rubber parts vulcanization temperature and time
Time:
2023-08-09
Cloth shoes are made of fiber material as upper and rubber as outsole material, and processed by hot vulcanization and other methods. Reclaimed rubber can be used alone or with natural rubber, synthetic rubber and the production of rubber parts of cloth shoes, effectively reducing the cost of raw materials. The use of recycled rubber in the preparation of cloth shoes rubber parts in the vulcanization process operation, be sure to reasonably control the vulcanization temperature and time, master the vulcanization conditions, improve the quality of the finished product.
1. Reclaimed rubber production of cloth shoes rubber parts of the vulcanization temperature and heating mode
(1) Vulcanization temperature: the vulcanization of rubber shoes is mainly based on hot air vulcanization, and the vulcanization temperature is generally controlled at 128-136℃. In actual production, rubber shoes vulcanization process, the oxygen in the air on the surface of the rubber oxidation, this oxidation is intensified with the increase in temperature; at the same time, the rubber shoes upper material to withstand high temperatures is limited, too high a temperature will lead to a decline in strength and make the quality of synthetic materials change. Therefore, the use of recycled rubber production of cloth shoes rubber part, vulcanization temperature needs to be limited to a certain range.
(2) heating mode: different rubber parts in cloth shoes have different degrees of friendship, in order to reduce the temperature difference between the rubber parts, to avoid the rubber parts from softening and collapsing and deformation caused by the rapid feeding of high temperature air and other phenomena, the vulcanization of rubber shoes should be carried out in phases, every certain period of time, that is, step by step heating up.
2. Recycled rubber production of cloth shoes rubber parts of the vulcanization time
Shoes vulcanization in the vulcanization tank, cloth shoes rubber parts using recycled rubber to reduce the cost, the required vulcanization time is longer, generally 45-60min. in actual production, the heat transfer of hot air HYL12Y4YESYC relative to the model vulcanization of the heat transfer to be much slower, and therefore, from the equivalent of the vulcanization time to compare is also correspondingly longer. At the same time, the unvulcanized rubber shoes are put into the vulcanization tank at room temperature, and then vulcanized with heating medium, so the heating process is also much longer than the model vulcanization.
3. Reclaimed rubber production of cloth shoes rubber parts of the vulcanization pressure
When using reclaimed rubber to prepare rubber parts for fabric shoes, the appropriate vulcanizing pressure can ensure the denseness of the rubber material, which in turn ensures the adhesive strength between the rubber parts and the rubber parts and between the rubber parts and the upper material. At higher temperatures, higher air pressure will also increase the destructive effect of oxygen on rubber, so the vulcanizing pressure of rubber shoes in the vulcanizing tank should be about 0.3MPa. Vulcanization pressure needs to be kept constant within the specified range at all stages of vulcanization.
4. Common vulcanization conditions for rubber parts of cloth shoes made of recycled rubber
Cloth shoes rubber parts using recycled rubber to reduce the cost, if the use of mixed gas vulcanization shoes, steam pressure is generally controlled at 0.4-0.5MPa, compressed air 0.3MPa; vulcanization time is controlled between 45-60min; the use of gradual heating waterproofing for heating, vulcanization tank temperature is controlled between 130-135 ° C. The vulcanization pressure is controlled at 0.4-0.5MPa, compressed air 0.3MPa.
In actual production, fabric rubber shoes different rubber parts physical demand is different, can be mixed with different ratios of recycled rubber, the follow-up I will continue to share with you mixed with recycled rubber fabric rubber shoes rubber parts formula design points and vulcanization reference formula.
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