0 前言对适用于制造电器设备的聚酰胺6(PA6)和聚酰胺66(PA66)材料而言,一个重要的性能要求是必须达到UL94标准规定的阻燃等级。在按UL94标准进行的燃烧性能测试中,将被测试材料制成试片,垂直放置在测试装置中,在试片下端用煤气火焰点火两次共10秒钟,如果任意一个被测试片在着火后持续燃烧时间都不超过10秒钟,并且同样材料的五个试片在着火后的平均持续燃烧时间不超过5秒钟,同时任何试片产生的融滴都没有引燃试片下方放置的脱脂棉,那么,这种材料 0 Preface An important performance requirement for polyamide 6 (PA6) and polyamide 66 (PA66) materials suitable for use in the manufacture of electrical equipment is that they must meet the flame retardant rating specified in UL94. In accordance with the UL94 standard combustion performance test, the test material will be made of test strips, placed vertically in the test device at the bottom of the test piece with a gas flame twice a total of 10 seconds, if any of the test piece in the fire After the continuous burning time of not more than 10 seconds, and the same material five test pieces in the fire after the average continuous burning time of not more than 5 seconds, while any test piece produced droplets are not ignited under the test piece placed Cotton, then, this material