食品级不锈钢PEI 2200阻燃性沙伯基础---Pei also has low shrinkage and goode mechanical properties. Adding glass fiber, carbonfiber or other fillers can achieve the purpose of reinforcement andmodification; it can also form heat-resistant polymer alloy withother engineering plastics, and can be used for a long time at -160 ~ 180 ℃. According to UL, the long-term service temperature ofpolyether imide resin is 338t and 356t. According to the grade, thecombustion grade reaches ul94v-010 mil thickness. The oxygen indexis 47, and Pei meets the re of FAA flame retardancy andheat release material standards for aircraft interiors. It has aglass transition temperature of 419f and allows intermittent use at392f, resulting in short-term excursion at higher temperatures.
PEI还具备很低的缩水率及优良的等方位机械设备特点。添加玻纤、碳纤维材料或别的填充料可做到提高改性材料的目地；也可和其他橡胶制品构成耐高温高分子材料铝合金，可在-160～180℃的操作温度下长期性应用。英国保险商试验室要求甲基丙烯酸酯亚胺环氧树脂的长期性应用溫度是338T和356T依据级别，点燃级别做到UL94V—010密耳薄厚。阻燃等级达47，PEI合乎飞机场内件规定的FAA阻燃等级和热稀放性的原材料规范。它的玻璃化变化溫度为419F，并容许在392F下中断应用，在高些溫度下，造成短期内偏位
Notes for barrel selection and screw design:
2. When processing Pei resin, traditional manufacturingmaterials suitable for screw and barrel can be used. Bimetal barrelis recommended. According to the screw diameter, it is better tomake the length diameter ratio 20:1 and compression ratio2.2:1.
In addition, it is also recommended to use a short feed zone (5segments) and a long compression zone (11 segments), whilegradually transiting to a shorter metering zone (4 segments)through a constant taper. Compression should be accomplished at agradual transition of constant taper, as sharp changes may resultin excessive shear forces and material degradation. If it is notpossible to select a specific screw, the use of universal screwwith aspect ratio of 16:1 to 24:1 and compression ratio of 1.5:1 to3.0:1 has been proved to be successful. It is not recommended touse the barrel with vent to process Pei * resin. The check valveshall be in the sliding rod metering area, and the flow clearanceshall normally account for at least 80% of the cross section of theflow area
Pei is amorphous, with excellent high temperature resistance,high strength, high modulus, wide chemical resistance, naturalflame resistance, low flue gas emission, high dielectric constantand loss factor.
