F-12芳纶织物输送带的制备及其性能

为提高F-12芳纶织物与橡胶之间的粘结性能,采用环氧树脂和偶联剂A187对F-12芳纶织物进行改性。通过成膜分析确定出环氧树脂的最佳用量;通过改性后F-12芳纶织物的浸水高度以及浸渍间苯二酚-甲醛树脂乳液后的拉伸强度和断裂强度测试,确定出偶联剂A187的最佳用量。在此基础上,对改性后的F-12芳纶织物进行硫化成型,测试织物与橡胶的剥离强度确定出最佳改性工艺。结果表明:环氧树脂用量为25%(o.w.f),偶联剂A187用量为1.2%(o.w.f)时,制备的F-12芳纶织物轻薄输送带的综合性能最佳;改性后浸水高度值最低的F-12芳纶织物制备的轻薄输送带的剥离强力达到最高,为12.1 N/mm,其剥离强度高于行业标准;制备的单层铺层输送带的扯断强力为6 495.25 N,断裂伸长率为13%,双层铺层输送带的扯断强力为14 493.25 N,断裂伸长率为14%。

Preparation and properties of conveyor belt reinforced by F-12 aramid fabric

In order to improve the adhesion between F-12 aramid fabric and rubber in conveyor belt, epoxy resin and coupling agent A187 were used to modify the fabric. The optimum dosage of epoxy was determined by film forming analysis. The optimum dosage of coupling agent A187 was determined by measuring the hydrophilic height of the modified fabric and the tensile strength of the modified fabric after immersion in resorcinol formaldehyde resin emulsion. Based on the above, the modification of the fabric was vulcanized, and the optimal modification process was determined by testing the peel strength between the fabric and rubber. The results show that when the content of epoxy resin is 25% (o.w.f) and the content of coupling agent A187 is 1.2% (o.w.f), the comprehensive performance of the F-12 aramid fabric conveyor belt is the best. It is found that the fabric with the lowest hydrophilic value turns to have the highest peel strength of 12.1 N/mm, which is higher than what is required in the industry standard. The tensile strength and elongation at break of the single layer conveyor belt are 6 495.25 N and 13% respectively, and 14 493.25 N and 14% for the double layer belt.