Regarding fiber heat setting: too short heat setting time will not achieve the purpose of fiber setting, and too long heat setting time will cause the fiber to break.
About fiber thermal training: thermal training time is too short to achieve the purpose of fiber training, and thermal training time is too long fiber will break.
About the heat setting of fiber: if the heat setting time is too short, the fiber can not be set, and if the heat setting time is too long, the fiber will break.<br>