大型固体助推器含凯夫拉纤维的橡胶绝热层由于石棉是致癌物质，近年来国外在新型固体火箭发动机中已成功地采用了无石棉绝热层．为降低绝热材料的密度和提高其抗烧蚀性能，８０年代的研究工作表明凯夫拉短纤维是能取代石棉的最好纤维材料．另外，在无石棉绝热层材料中还含... Large solid booster Rubber heat-insulating layer with Kevlar fiber As asbestos is a carcinogen, foreign non-asbestos heat-insulating layers have been successfully used in new solid rocket motors in recent years. To reduce the density of insulating materials and improve their ablation resistance, research work in the 1980s showed that Kevlar staple fiber is the best fiber material to replace asbestos. In addition, non-asbestos insulation material also contains ...