Rubber sheets are made of rubber as the main raw material. According to the performance, they can be divided into ordinary rubber sheets, acid and alkali resistant rubber sheets, heat-resistant rubber sheets, oil-resistant rubber sheets, flame-retardant rubber sheets, wear-resistant rubber sheets, etc. The performance requirements of the rubber sheet are different, and it is necessary to select the appropriate rubber variety. EPDM reclaimed rubber retains the basic performance characteristics of EPDM rubber, and has excellent high and low temperature resistance, weather resistance, and ozone resistance. It can be used alone or in combination with EPDM raw rubber to produce special rubber sheets. Effectively reduce costs on the premise.
1. Application of EPDM reclaimed rubber in heat-resistant rubber sheet
Under the action of high temperature or thermal oxygen, the main chain will be cracked and the cross-linked network will be destroyed, which will cause the rubber to become hard, brittle, and mechanical properties. EPDM rubber has excellent high temperature resistance and is an ideal raw material for the production of heat-resistant rubber sheets.When using EPDM reclaimed rubber to produce low-cost heat-resistant rubber sheets, in addition to selecting reclaimed rubber with high ethylene-propylene content, it is also necessary to reasonably design the formula and coordination system.
EPDM reclaimed rubber heat-resistant rubber sheet is recommended to use sulfur carrier such as thiuram or effective vulcanization system, or use peroxide vulcanization to improve the heat resistance of the rubber sheet. For the anti-aging system, it is recommended to select high-efficiency heat-resistant anti-aging agent, increase the dosage appropriately, and use two or more anti-aging agents together if necessary. The softener in the softening system should choose a softener with a large molecular weight and a high boiling point, such as a polyester plasticizer or a reactive softener, to avoid the increase in the hardness of the rubber sheet and the decrease in the elongation due to the high temperature migration and volatilization of the softener. There was a problem.
2. Application of EPDM reclaimed rubber in insulating rubber sheets
EPDM rubber is a non-polar rubber with resistance to polar solutions and chemicals, low water absorption, and excellent electrical insulation properties, which can be used to produce insulating rubber sheets. EPDM reclaimed rubber inherits the structural characteristics of EPDM rubber and can be used in the production of insulating rubber sheets. When EPDM reclaimed rubber or EPDM rubber/reclaimed rubber is used to produce insulating rubber sheets, it is generally recommended to use low-structure carbon black and clay, talc, calcium carbonate, etc. for reinforcement and filling; use paraffin, or For the softening system that uses paraffin and coumarone together, petrolatum and naphthenic oil can also be added; it is recommended to use amine or p-phenylenediamine anti-aging agent as anti-aging agent, and add anti-aging agent H in an appropriate amount to improve the heat resistance and insulation of rubber. performance.
3. Application of EPDM reclaimed rubber in flame retardant rubber sheet
EPDM rubber and EPDM reclaimed rubber can be used to prepare flame retardant compounds with the combination of magnesium hydroxide, flame retardant, carbon black, zinc oxide, stearic acid, paraffin oil, silane coupling agent and other ingredients , flame retardant plywood is one of them. When using EPDM reclaimed rubber 2ELYY34 alone or EPDM rubber/reclaimed rubber in combination to produce flame retardant rubber sheets, add halogens, phosphorus series, metal oxides such as chlorinated paraffin, antimony trioxide, aluminum hydroxide, etc. Flame retardant can effectively improve the flame retardant performance of the rubber compound; it is recommended to use inert fillers such as clay for the filling system; reduce the amount of plasticizer, and use phosphate ester plasticizer if necessary to better ensure the resistance of the flame retardant rubber sheet. combustion performance.
Using EPDM reclaimed rubber to replace a certain proportion of EPDM rubber is the mainstream way to reduce the production cost of EPDM rubber products. When using EPDM reclaimed rubber to produce rubber sheets for special occasions, rubber product manufacturers must choose suitable EPDM reclaimed rubber. It is recommended to use environmentally friendly EPDM reclaimed rubber and odorless EPDM reclaimed rubber for export products. For reclaimed rubber and thin rubber sheets, it is recommended to use filter-type ultra-fine EPDM reclaimed rubber, etc.; rationally design formulas to further optimize product quality while reducing costs. Later, the editor will have the opportunity to continue to share with you the production process of EPDM reclaimed rubber to produce various types of special rubber sheets and the points that need to be paid attention to in the production process.
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