久久久久国产成人精品亚洲午夜_成人免费毛片一区二区三区_国产成人久久精品激情91_国产成人无码精品久久久免费_精品欧美国产一区二区三区不卡_国产成人一区二区三区影院

Inhigh-speedracingcompetitions,safetyandperformanceareamongthemostconcernedissuesforracingenthusiasts,andtheracinghelmetisacrucialpieceofequipmentforprotectingthehead.Inrecentyears,thePC/ABSalloymaterialhasbecomethepreferredmaterialformakingracinghelmets,mainlyduetoitsexcellentproperties.

Theflame-retardantPC/ASAalloymaterialproducedbyQingdaoZhongxinhuaMeihasexcellentflame-retardantproperties,anditsflame-retardantgradecanreachUL94-V0level.Itwillextinguishimmediatelyafterthefiresourceisremoved,whichcaneffectivelyslowdownthespreadofthefireandreducethefirerisk,providinganimportantguaranteeforthesafetyofthedrone.

TPR/TPE等注塑成型的制品易出現表面表面暗淡無光，或光澤、色澤不均勻。針對這種現象，先分析總結產生原因及其解決方案如下。