Ordinary rubber pipes are mainly composed of inner layer glue, outer layer glue, filling glue and cloth wiper glue. The performance requirements of each glue layer are different, and the rubber materials, glue content and compounding agents used are very different. When using latex reclaimed rubber to reduce the production cost of each rubber layer of an ordinary hose, rubber hose manufacturers need to reasonably choose latex reclaimed rubber, and adjust the reclaimed rubber and formula appropriately. Key points of cloth glue formula design.
3. Key points of formula design of ordinary hose filler mixed with latex reclaimed rubber
Ordinary hose fillers are intermediate rubber and medium rubber, which can make the hose integrated, reduce the dynamic friction fatigue and heat generation among the internal skeleton materials of the tube body, and prevent the inner rubber layer, outer rubber layer and skeleton layer from delamination, Generally, natural rubber, styrene-butadiene rubber and cis-butadiene rubber are used as the main raw materials for processing; appropriate amount of latex reclaimed rubber 2ELYY922 is used, and the rubber content is controlled at about 25%. Ordinary hose fillers require the rubber to have good adhesion, elasticity, softness and flex resistance, and the vulcanization speed matches each rubber layer.
When natural rubber/synthetic rubber/latex reclaimed rubber is used together to prepare the intermediate rubber for ordinary hoses, sulfur/thiazole accelerators/sulfenamide accelerators are generally used. The amount of sulfur is slightly higher than that of inner layer rubber and cloth wiper rubber. A small amount of thiuram accelerators. Ordinary hose fillers containing latex reclaimed rubber are mostly reinforced with semi-reinforced furnace black, high wear-resistant carbon black, and general-purpose furnace black, and filled with calcium carbonate and clay. To improve the processing performance of natural rubber/synthetic rubber/latex reclaimed rubber combined rubber, it is recommended to use solid softener and liquid softener together, and the amount of softener can be appropriately increased.
4. The key points of formula design of ordinary hose wiper glue mixed with latex reclaimed rubber
Ordinary hose wiping glue is the cloth layer glue, which is mainly used to firmly bond among the skeleton layers and among the skeleton layer and the inner and outer rubber layers. The rubber material is required to have good fluidity, permeability to the fabric, and good adhesion. The focus is generally on natural rubber, with an appropriate amount of styrene-butadiene rubber, cis-butadiene rubber or neoprene rubber; the use of latex reclaimed rubber reduces costs, and the rubber content is controlled among 35% and 40%.
When natural rubber/synthetic rubber/latex reclaimed rubber is used as raw material to produce ordinary hose cloth wipers, sulfur/thiazole accelerators/thiuram accelerators are generally used, and the amount of sulfur is controlled among 1-2 parts, and a small amount Thiuram accelerators can be used. Ordinary hose cloth wipes containing latex reclaimed rubber are generally reinforced with semi-reinforced furnace black/general-purpose furnace black, semi-reinforced furnace black/high wear-resistant furnace black, and the dosage of reinforcing agent is slightly lower than that of inner layer rubber; filler recommended Use calcium carbonate, clay, etc. Combining pine tar, heavy oil and other rubber oils with a certain viscosity-increasing effect with an appropriate amount of rosin can not only increase the viscosity of the rubber compound, but also improve the processing performance of the combined rubber compound.
The main raw materials of latex reclaimed rubber are natural rubber waste rubber cups, waste latex silk, waste latex gloves, waste condoms, etc., which are produced through classification, selection, disinfection and drying, crushing and desulfurization, filtering and extrusion, and the basic natural rubber is retained. Its performance characteristics can directly replace a certain proportion of natural rubber to produce various rubber layers of ordinary hoses, and effectively reduce the cost of raw materials on the premise of ensuring product quality. Later, the editor will continue to share with you the process points and practical formulas of latex reclaimed rubber for preparing ordinary hose inner layer glue, outer layer glue, middle glue or cloth wiper glue.
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