The acid and alkali resistant rubber sheet requires the rubber compound to have good resistance to acid and alkali solutions, and it is not easy to cause problems such as swelling, shrinkage, softening or brittle cracking in acid and alkali media for a long time. The acid and alkali resistance of the rubber compound mainly depends on the rubber variety, among which natural rubber is mainly used in the production of some rubber sheets with general acid and alkali resistance requirements. In actual production, the price of natural rubber is high and fluctuates greatly. How can acid and alkali resistant rubber sheet manufacturers reduce production costs? What problems should we pay attention to?
1. The main way to reduce the cost of natural rubber acid and alkali resistant plywood
When natural rubber is used as the main raw material to produce acid and alkali resistant rubber sheets, appropriate use of renewable resources such as tread reclaimed rubber and reclaimed rubber powder can effectively reduce the cost of raw materials. Increasing the amount of filler or rubber oil in the natural rubber acid and alkali resistant plywood can also achieve the purpose of reducing costs. Common low-cost fillers include calcium carbonate, clay, etc., and inorganic fillers need to be surface treated if necessary; The rubber oil corresponding to the dosage can better ensure the performance of the acid and alkali resistant rubber sheet.
2. Points for attention to reduce the cost of natural rubber acid and alkali resistant plywood
(1) Points to note when using recycled rubber resources: When using reclaimed rubber or reclaimed rubber powder to reduce the production cost of acid and alkali-resistant rubber sheets, it is recommended to use tire reclaimed rubber, which has many raw materials and low prices. Among them, tire tread rubber powder is used as raw material. Tread reclaimed rubber 2ELYY67 has higher mechanical strength, better elasticity, wear resistance and flex resistance. An appropriate amount of butyl reclaimed rubber can also be added to the formula of natural rubber acid and alkali resistant plywood to further improve the acid and alkali resistance of the finished product.
(2) Points to note when using low-cost rubber fillers: When using low-cost fillers for natural rubber acid and alkali-resistant rubber sheets to reduce costs, be sure to avoid the use of water-soluble fillers and fillers with high moisture content. If necessary, mineral ointment or quicklime can be used to absorb Moisture; it is recommended to use chemically inert rubber fillers such as clay, barium sulfate, talc, diatomaceous earth, etc. It should be noted that in the alkali-resistant natural rubber/tread reclaimed rubber sheet, silica fillers, phenol resins, talc powders and other rubber fillers that are easily corroded by reaction with alkali are not suitable for use.
3. The formula of natural rubber acid and alkali resistant rubber sheet containing reclaimed rubber
Natural rubber, 100 parts; reclaimed rubber, 100 parts; zinc oxide, 7 parts; stearic acid, 2.5 parts; antioxidant D, 1 part; paraffin, 5 parts; high wear-resistant carbon black, 40 parts; barite powder, 232.2; Ointment, 8 parts; Accelerator M, 0.7 part; Accelerator D, 0.5 part; Accelerator TMTD, 0.1 part; Sulfur, 3 parts; Total: 500 parts.
At present, many natural rubber acid and alkali-resistant rubber sheet manufacturers will use reclaimed rubber in the formula in an appropriate amount; when using reclaimed rubber to reduce the production cost of acid and alkali-resistant rubber sheets, it is necessary to adjust the vulcanization system appropriately, by increasing the degree of vulcanization and increasing the crosslinking density. The chemical resistance of vulcanized rubber, reasonable selection of reinforcing agents, softeners, plasticizers, etc., the editor will continue to discuss with you the specific production process and formula optimization of natural rubber/reclaimed rubber combined with rubber to produce low-cost acid and alkali resistant rubber sheets Skill.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits