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high glass fiber (GF) high temperature nylon: lubricant and antioxidant, 你选 for 吗?
high temperature nylon （PA6T/9T/10T/PPA and other ）凭借 its color heat resistant property, machine strong/high degree and dimensional stability, already formed is electronic connectors, automotive machine 周边部 parts “标配”材 material. it to high ratio/proportion glass fiber (GF) （40%-60%）, property can more is 如虎添翼.
但 high glass fiber (GF) content to processing and application belt/tape di heavy 挑战:
processing 端: melt viscosity rise, glass fiber (GF) outer 露（ fiber exposure ）, equipment abrasion loss add 剧
application 端: long 期暴露于150℃ above high temperature ring 境, material easy hot oxygen aging 变脆
need meanwhile solution this issues, lubricant and antioxidant selection is key/critical. 今天我们就 聊聊, 针 for high glass fiber (GF) high temperature nylon , this types additives to how 选.
01 lubricant selection: 先扛 住 high temperature, again improvement flow
for/regarding high glass fiber (GF) content （40%-60%） high temperature nylon, lubricant need is in 300-340℃ processing temperature degree lower separation understanding, 不挥发. if lubricant 自己先“牺牲”, improvement flow, anti fiber exposure from 谈起.
lubricant large core function
reduce melt viscosity : high flow property, thin parts 充模 anti glass fiber (GF) outer 露: improvement surface gloss, decrease/reduce fiber exposure decrease/reduce equipment abrasion loss: screw and mold
主流 high temperature resistance lubricant comparison selection key points: heat stabilized property excellent 先: 务必查阅TGA data, ensure separation understanding temperature degree ＞ processing temperature degree and glass fiber (GF) 协同: property lubricant （如RH-313, 树枝状 polymer ） can promote glass fiber (GF) dispersion, decrease/reduce fiber exposure 添 add amount control : usually 0.3%-1.0%, amount can can 导致析出 or force property can decline
02 antioxidant selection: 150℃ above long 期服役, is 王道
high temperature nylon in 150℃ above long use 时, hot oxygen aging is main/primary 失效模式. nylon separation in amine in hot and oxygen function lower fracture, formed 自由基, 进而引发链式 reaction, 导致材 material 变黄, 变脆, force property can decline.
antioxidant core function mechanism 主 antioxidant （受 retardant type ）: 捕捉自由基, 终止链式 reaction 辅助 antioxidant （亚磷 acid ester type ）: separation understanding hydrogen oxidation material, anti its new 自由基
high temperature nylon antioxidant comparison
key/critical research data: LS-21 vs 1098/168
according to for glass fiber reinforced PA66 in 180℃ lower hot oxygen aging research:
LS-21 system in processing stability property and long hot oxygen aging anti 护两方面均 excellent 于传统1098/168复配 system.
antioxidant selection 三 层次
03 实战建议: how to 搭建你 additives system
lubricant recommendation （ high glass fiber (GF) high temperature nylon ）
antioxidant recommendation （＞150℃ long aging ）
04 summary 两 原则, one-time 说透
lubricant : heat stabilized property is 底线. separation understanding temperature degree must ＞ processing temperature degree, property lubricant more has solution fiber exposure issues.
antioxidant: 复配 is 王道. resistant +辅 resistant is 基础, for 150℃ above long aging, selection 经 验证 composite/compounding system （如LS-21）.
high glass fiber (GF) high temperature nylon additives selection, essence upper is and “ high temperature ” 博弈. has 每一克 additives 都经 起 hot 浪 考验, most products can in high strength, high appearance requirements application in 站稳脚跟.
