描述
PBT抗静电材料
建筑装饰业
交通运输业、广告业
电气、化工机械、汽车业
PBT抗静电材料
产品细节产品细节
<<<<<<<<<<<<<<<<<<<> 1。机械性能：高强度、抗疲劳性、尺寸稳定性和小蠕变（在高温条件下几乎没有变化） 2。耐热老化：增强的UL温度指数达到120~140℃（长期户外耐老化性也很好） 3。耐溶剂性：无应力开裂 4。对水的稳定性：PBT在水中容易分解（在高温高湿环境中小心使用） 5。电气性能：绝缘性能：优良（即使在潮湿和高温下也能保持稳定的电气性能，是制造电子电气零件的理想材料）；介电系数：3.0-3.2；电弧电阻：120s。成型加工性：普通设备注塑或挤出成型。由于结晶速度快，流动性好，模具温度也低于其他工程塑料。加工薄壁零件只需几秒钟，而大型零件只需40-60秒 PBT。GF10%加固。PBT材料冷却风扇。PBT抗静电材料（聚对苯二甲酸丁酯）用途： 1。电子电器：连接器、开关件、家用电器、配件、小电器盖或（耐热、阻燃、电气绝缘、成型加工性） 2。汽车： a.外部部件：主要包括角栅、发动机通风盖等 b.内部组件：主要包括内窥镜支架、雨刮器支架和控制系统阀门；与尼龙、聚碳和聚甲醛一样好，但随着低翘曲PBT的出现，它肯定会在未来用于汽车零部件） <3。机械设备：录像机皮带传动轴、电子计算机盖、灯罩、电熨斗盖、烘焙机零件及大量齿轮、凸轮、按钮、电子表壳、相机零件（具有耐热性、耐燃性要求） <2注塑机使用螺杆注塑机时。应考虑以下几点 ①产品中的材料用量应控制在注塑机额定最大注射量的30%~80%之间。不适合使用大型注塑机生产小型产品 ②应选择长径比为15-20、压缩比为2.5-3.0的渐变三段螺钉 ③应使用带加热和温度控制装置的自锁喷嘴 ④ 成型阻燃PBT时，注塑机的相关部件应进行防腐处理 3产品和模具设计①产品的厚度不能太厚。PBT对间隙非常敏感。因此，产品的过渡应通过电弧连接 ②PBT的成型收缩率较大，在1.7%到2.3%之间，模具必须有一定的拔模角度 ③模具需要配备排气孔或排气槽 ④浇口直径应较大 ⑤模具应配备温度控制装置。模具的最高温度不能超过100°C。 ⑥阻燃PBT模塑件的表面必须镀铬，以防腐蚀 4原材料制备 注射成型前应进行干燥，含水率应控制在0.02%以下。采用热风循环干燥时，当温度为105℃、120℃或140℃时，相应时间不超过8h、5h、3h。材料层厚度小于30mm 5注射成型工艺参数①PBT的分解温度为280℃，实际生产中一般控制在245~260℃之间 ②喷射压力喷射压力一般为50~100MPa ③注射速率PBT具有较快的冷却速率，因此应使用较快的注射速率 ④ 背压成型PBT的螺杆转速和螺杆转速不宜超过80r/min，一般在25～60r/min之间，背压一般为注射压力的10%～15% ⑤模具温度一般控制在70~80℃，各部位温差不超过10℃ ⑥成型周期一般为15~60秒。 是专业的pbt抗静电材料制造商之一，您可以从我们工厂以优惠的价格订购高质量的pbt抗静电材料 Architecture Decoration IndustryPBT Antistatic Material
Transportation Industry, Advertisement Industry
Electric & Electrical, Chemical Machinery,
Automobile Industry
PBT Antistatic Material
Product Details
PBT antistatic material
Characteristics of PBT (Polybutyl Terephthalate)
1. Mechanical properties: high strength, fatigue resistance, dimensional stability, and small creep (very little change under high temperature conditions);
2. Heat aging resistance: the enhanced UL temperature index reaches 120~140℃ (long-term outdoor aging resistance is also very good);
3. Solvent resistance: no stress cracking;
4. Stability to water: PBT is easy to decompose when exposed to water (use caution in high temperature and high humidity environments);
5. Electrical performance: Insulation performance: excellent (it can maintain stable electrical performance even under humidity and high temperature, it is an ideal material for manufacturing electronic and electrical parts); Dielectric coefficient: 3.0-3.2; Arc resistance: 120s
6. Molding processability: ordinary equipment injection molding or extrusion molding. Due to the fast crystallization speed and good fluidity, the mold temperature is also lower than that of other engineering plastics. When processing thin-walled parts, it only takes a few seconds, and it only takes 40-60s for large parts.
PBT.GF10% reinforced. PBT material cooling fan. PBT antistatic material (polybutyl terephthalate) use:
1. Electronic appliances: connectors, switch parts, household appliances, accessory parts, small electric covers or (heat resistance, flame resistance, electrical insulation, molding processability);
2. Car:
a. Exterior parts: mainly include corner grid, engine vent cover, etc.;
b. Internal components: mainly include endoscope stays, wiper brackets and control system valves;as good as nylon, polycarbon and polyoxymethylene, but with the emergence of low warpage PBT, it will definitely be used in automobile parts in the future)
3. Mechanical equipment: belt drive shaft of video tape recorder, electronic computer cover, lamp cover, electric iron cover, baking machine parts and a large number of gears, cams, buttons, electronic watch casings, camera parts (with heat resistance, resistance Fuel requirements);
PBT has an obvious melting point, with a melting point of 225~235°C. It is a crystalline material with a crystallinity of up to 40%.
The viscosity of PBT melt is not affected by temperature as much as shear stress. Therefore, in injection molding, the influence of injection pressure on the fluidity of PBT melt is obvious.
PBT has good fluidity and low viscosity in the molten state, second only to nylon, and is prone to “casting” during molding.
PBT molded products are anisotropic. PBT is easily degraded in water at high temperature.
2 Injection molding machine
When using a screw injection molding machine. The following points should be considered.
①The amount of materials used in the product should be controlled within 30%~80% of the rated maximum injection volume of the injection molding machine. It is not suitable to use large injection molding machines to produce small products.
②The gradual three-section screw should be selected, with a length-to-diameter ratio of 15-20 and a compression ratio of 2.5-3.0.
③Self-locking nozzles should be used, with heating and temperature control devices.
④ When molding flame-retardant PBT, the relevant parts of the injection molding machine should be treated with anti-corrosion.
3 Product and mold design
①The thickness of the product should not be too thick. PBT is very sensitive to the gap. Therefore, the transition of the product should be connected by arc.
②The molding shrinkage rate of PBT is relatively large, ranging from 1.7% to 2.3%, and the mold must have a certain draft angle.
③The mold needs to be equipped with exhaust holes or exhaust grooves.
④The gate diameter should be large.
⑤The mold should be equipped with temperature control device. The maximum temperature of the mold cannot exceed 100°C.
⑥The flame-retardant PBT molding must be chrome-plated on the surface of the mold to prevent corrosion.
4 raw material preparation
Drying should be carried out before injection molding, and the moisture content should be controlled below 0.02%. When using hot air circulation drying, when the temperature is 105℃, 120℃ or 140℃, the corresponding time does not exceed 8h, 5h, 3h. The thickness of the material layer is less than 30mm.
5Injection molding process parameters
①The decomposition temperature of PBT is 280℃, so it is generally controlled between 245~260℃ in actual production.
②Injection pressure The injection pressure is generally 50~100MPa.
③The injection rate PBT has a fast cooling rate, so a faster injection rate should be used.
④ The screw speed and the screw speed of back pressure forming PBT should not exceed 80r/min, generally between 25~60r/min. The back pressure is generally 10% to 15% of the injection pressure.
⑤The mold temperature is generally controlled at 70~80℃, and the temperature difference of each part does not exceed 10℃.
⑥The molding cycle is generally 15~60 s.
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