With the improvement of social production efficiency, conveyor belt is more and more widely used in material transportation industry. However, the high temperature resistant conveyor belt usually has a short service life due to its harsh working environment. In order to improve the high temperature resistance and extend the service life of high temperature conveyor belt, the high temperature resistance of SBR, EPDM and silicone rubber was studied from the aspect of covering rubber material of high temperature conveyor belt, and the aramid canvas adhesive layer rubber was developed from the aspect of adhesive layer rubber material. In order to improve the heat resistance of SBR, vulcanization system and blending with EPDM were studied.

　　丁苯橡膠用過氧化二異丙苯硫化，老化后保留率高，但機(jī)械強(qiáng)度低。無硫硫化體系硫化的丁苯橡膠具有較好的力學(xué)性能和耐熱老化性能。丁苯橡膠和三元乙丙橡膠的結(jié)合能提高丁苯橡膠的耐熱性，但丁苯橡膠的機(jī)械強(qiáng)度和耐磨性下降。為了提高三元乙丙橡膠的抗老化開裂性能，將三元乙丙橡膠/FKM共混物與氟橡膠一起使用。

　　SBR vulcanized with diisopropylperoxide has high retention rate but low mechanical strength after aging. SBR vulcanized by sulfur free vulcanization system has better mechanical properties and heat aging resistance. The combination of SBR and EPDM can improve the heat resistance of SBR, but the mechanical strength and wear resistance of SBR decrease. In order to improve the cracking resistance of three EPR, three EPR /FKM blends were used together with fluorine rubber.

　　為了制備能在200以上長期使用的耐高溫輸送帶產(chǎn)品，選用硅橡膠作為輸送帶的覆蓋材料。通過使用過氧化二異丙苯硫化和氣相二氧化硅與沉淀二氧化硅的結(jié)合，制備的硅橡膠拉伸強(qiáng)度達(dá)到9MPa以上。

　　In order to prepare high temperature resistant conveyor belt products that can be used for more than 200 years, silicone rubber is selected as the covering material of conveyor belt. The tensile strength of the silicone rubber is more than 9Mpa by using the combination of cumene peroxide vulcanization and fumed silica and precipitated silica.

　　在175老化14天后，拉伸強(qiáng)度保持率達(dá)到80%以上，解決了硅橡膠與聚酯帆布的粘接問題。在聚酯帆布的表面涂覆由多元醇、硅烷偶聯(lián)劑、羥基硅油等制備的熱硫化粘合劑，或者直接在硅橡膠中加入粘合劑體系，使硅橡膠與聚酯帆布的粘合強(qiáng)度達(dá)到6.8N/mm，聚酯帆布表面的粘合劑附著率為100%。選用高強(qiáng)耐高溫芳綸帆布作為骨架材料，充油三元乙丙橡膠和天然橡膠一起使用，制備的粘合層橡膠材料與芳綸帆布的粘合強(qiáng)度達(dá)到15.6牛頓/毫米，粘合層與覆蓋層的粘合強(qiáng)度達(dá)到25牛頓/毫米；在175老化96小時后，粘合層與覆蓋層之間的粘合強(qiáng)度仍達(dá)到9.3N/mm，粘合層與帆布層之間的粘合強(qiáng)度達(dá)到6.8N/mm:在175時，粘合層與覆蓋層之間的粘合強(qiáng)度達(dá)到8.3N/mm，粘合層與帆布層之間的粘合強(qiáng)度達(dá)到2.4N/mm。保定京博橡膠生產(chǎn)的耐高溫輸送帶已被客戶使用一年多，未出現(xiàn)任何問題。

　　After 175 aging for 14 days, the retention rate of tensile strength is more than 80%, which solves the problem of adhesion between silicone rubber and polyester canvas. The surface of the polyester canvas is coated with a hot vulcanizing adhesive prepared by polyol, silane coupling agent, hydroxy silicone oil, etc., or the adhesive system is directly added into the silicone rubber, so that the adhesive strength of the silicone rubber and the polyester canvas reaches 6.8N/mm The adhesion rate of adhesive on the surface of polyester canvas is 100%. The high strength and high temperature resistant aramid canvas is selected as the skeleton material, and the oil filled EPDM is used together with natural rubber. The adhesive strength of the prepared adhesive layer rubber material and aramid canvas is up to fifteen point six Newton / mm, the bonding strength between the adhesive layer and the covering layer reaches 25 Newton / mm; after 175 aging for 96 hours, the bonding strength between the adhesive layer and the covering layer still reaches 9.3N/mm , gluing The adhesive strength between the layer and canvas layer is up to 6.8N/mm : at 175, the bonding strength between the adhesive layer and the covering layer reaches 8.3N/mm , the adhesive strength between the adhesive layer and the canvas layer reaches 2.4N/mm 。 The high temperature resistant conveyor belt produced by Jingbo rubber in Baoding has been used by customers for more than one year without any problems.