PC+PBT 357U

本公司承诺所售原料均为原厂原包,假一赔十

东莞永大塑胶原料有限公司
主营产品：

塑胶原料 工程塑胶 聚酰胺 PA66耐磨损 PA66超韧耐寒级 PA66食品级 PA66加玻纤 PA66增韧级 PA66阻燃防火 POM聚甲醛 高粘度POM 坚韧级POM 耐磨损POM 高韧性POM 抗紫外线POM 加玻纤POM 低翘曲POM
工程塑胶：EVA、PC、POM、PA6、PA66、PEEK、COC、PBT、PET PC/ABS、PPS、PPO、LCP；PC
热弹性体：K胶、TPE、TPR、PVC、TPU、TPV、TPX、SBS；
通用塑胶：ABS、PMMA、PP、PE、AS、HDPE、LDPE。
 特种料：   PEI、PTFE、PVDF
本公司所销售之塑胶原料均可提供原厂的物性表，UL MSDS SGS COC 欢迎来电咨询！

备注：公司长期销售塑胶原料/原厂原包，25千克/包，符合ROHS认证标准，25千克起。质量有保证

VALOX? PBT 176 resin SABIC Innovative Plastics
 
VALOX? PBT 215HPR resin SABIC Innovative Plastics
 
VALOX? PBT 295 resin SABIC Innovative Plastics
 
VALOX? PBT 310 resin SABIC Innovative Plastics
 
VALOX? PBT 310SE0 resin SABIC Innovative Plastics
 
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VALOX? PBT 325FC resin SABIC Innovative Plastics Europe
 
VALOX? PBT 337 resin SABIC Innovative Plastics
 
VALOX? PC+PBT 357 resin SABIC Innovative Plastics
 
VALOX? PC+PBT 357U resin SABIC Innovative Plastics
 
VALOX? PC+PBT 357X resin SABIC Innovative Plastics Europe
 
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VALOX? PBT 4022 resin SABIC Innovative Plastics Europe
 
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VALOX? PBT 420 resin SABIC Innovative Plastics
 
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PBT注塑工艺：
　　PBT的聚合工艺成熟、成本较低，成型加工容易。未改性PBT性能不佳，实际应用要对PBT进行改性，其中，玻璃纤维增强改性牌号占PBT的70％以上。
1、PBT的工艺特性
　　PBT具有明显的熔点，熔点为225～235℃，是结晶型材料，结晶度可达40％。PBT熔体的粘度受温度的影响不如剪切应力那么大，因此，在注塑中，注射压力对PBT熔体流动性影响是明显。PBT在熔融状态下流动性好，粘度低，仅次于尼龙，在成型易发生“流延”现象。PBT成型制品各向异性。PBT在高温下遇水易降解。
2、原料准备
　　注塑前要进行干燥、要将水分含量控制在0.02％以下。采用热风循环干燥时，当温度为105℃、120℃或140℃时，所对应的时间不超过6h、4h、2h。料层厚度低于30mm。
3、注塑工艺参数
　　①注射温度 PBT的分解温度为280℃，所以实际生产中一般控制在240-260℃之间。②注射压力注射压力一般为50～100MPa。③注射速率 PBT冷却速度快，因此要采用较快的注射速率。④螺杆转速和背压 成型PBT的螺杆转速不宜超过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℃，各部位的温度差不超过10℃。⑥成型周期 一般情况下为15～60 s。

PBT典型用途： ◆电子电气零件：连接器、插头、插座、线圈芯、继电器、开关、IC片基座、保险丝盒、马达端盖、马达碳刷座、整流器、可程式控制器、视听器材零件、电视反馈应变器、调谐器、CRT插座、VIR外壳、支杆、日光灯座。
◆汽车零件：配电盘盖、本体外壳、转子、化油器、安全带零件、齿轮类、排气改善阀件、齿轮箱、外部把手、连接器、缓行挡板、汽车外装部品、机车外装部品、点火装置开关、方向灯开关、加热器开关、车尾灯插座、保险丝盒、电压调整器零件、点火线圈外壳、线圈芯。
◆工业产品零件：钟表外壳、底板、照相机零件、OA器材按键、冷却风扇、家用机器零件、撒粉机外壳、休闲器材、钓具、线轴、滑雪板、瓦斯炉零件、水表外壳、抽水机外壳、流量控制机器、压力容器、化学液处理装。