SHF436HR沙伯基础PBT 耐水解性

SABIC Valox系列PBT简介

聚对苯二甲酸丁二醇酯，英文名polybutylene terephthalate（简称PBT），属于聚酯系列，是由1.4-pbt丁二醇(1.4-Butylene glycol)与对苯二甲酸(PTA)或者对苯二甲酸酯(DMT)聚缩合而成，并经由混炼程序制成的乳白色半透明到不透明、结晶型热塑性聚酯树脂。与PET一起统称为热塑性聚酯，或饱和聚酯。

PBT特性

1、机械性能：强度高、耐疲劳性、尺寸稳定、蠕变也小（高温条件下也极少有变化）；

2、耐热老化性：增强后的UL温度指数达120~140℃（户外长期老化性也很好）；

3、耐溶剂性：无应力开裂；

4、对水稳定性：PBT遇水易分解（高温、高湿环境下使用需谨慎）；

5、绝缘性能：优良（潮湿、高温也能保持电性能稳定,是制造电子、电气零件的理想材料）；

6、介电系数：3.0-3.2；

7、耐电弧性：120s

8、成型加工性：普通设备注塑或挤塑。由于结晶速度快，流动性好，模具温度也比其他工程塑料要求低。在加工薄壁制件时，仅需几秒钟，对大部件也只要40-60s即可。

PBT的应用

1、电子电器：连接器、开关零件、家用电器、配件零件、小型电动罩盖或（耐热性、阻燃性、电气绝缘性、成型加工性）；

2、汽车：外装零件：主要有转角格珊、发动机放热孔罩等；内部零部件：主要有内镜撑条、刮水器支架和控制系统阀；

3、汽车电器零件：汽车点火线圈绞管和各种电器连接器等。

4、机械设备：视频磁带录音机的带式传动轴、电子计算机罩、水银灯罩、电熨斗罩、烘烤机零件以及大量的齿轮、凸轮、按钮、电子表外壳、照相机的零件（有耐热、阻燃要求）

PBT注塑工艺

干燥处理：这种材料在高温下很容易水解，因此加工前的干燥处理是很重要的。建议在空气中的干燥条件为120℃，6~8小时，或者150℃，2~4小时。湿度必须小于0.03%。如果用吸湿干燥器干燥，建议条件为150℃，2.5小时。[2]

熔化温度：225~275℃，建议温度：250℃ 。

模具温度：对于未增强型的材料为40~60℃。要很好地设计模具的冷却腔道以减小塑件的弯曲。热量的散失一定要快而均匀。建议模具冷却腔道的直径为12mm。

注射压力：中等（最大到1500bar）。

注射速度：应使用尽可能快的注射速度（因为PBT的凝固很快）。

流道和浇口:建议使用圆形流道以增加压力的传递（经验公式：流道直径=塑件厚度+1.5mm）。可以使用各种型式的浇口。也可以使用热流道，但要注意防止材料的渗漏和降解。浇口直径应该在0.8~1.0*t之间，这里 t是塑件厚度。如果是潜入式浇口，建议最小直径为0.75mm。

SABIC Valox系列PBT介绍

Valox 175 Unreinforced, neat PBT resin for compounding only. Natural Color Only.

Valox 175HP Unreinforced, neat FDA compliant PBT resin for compounding only.

Valox 176 Unreinforced, neat PBT resin for fibers. Natural Color Only.

Valox 176HP Unreinforced, FDA compliant neat PBT resin for fibers. Natural Color Only.

Valox 195 For compounding only (not for injection molding) Unreinforced PBT.

Valox 195HP For compounding only (not for injection molding) Unreinforced PBT.

Valox 215HPR Unreinforced PBT with mold release. FDA food contact compliant in limited colors.

Valox 295 Unreinforced PBT;Melt viscosity 900-1300 poise.

Valox 305 PBT, For compounding only. Not intended for Injection Molding.

Valox 308 PBT, For compounding only. Not intended for Injection Molding.

Valox 310 Unreinforced, general purpose. Typical viscosity 5000-7000.

Valox 310SE0 Unreinforced, flame retardant PBT. V0-0.7mm.

Valox 311 Unreinforced, improved resistance to UV. Medium viscosity.

Valox 312 Unreinforced, For compounding only (not for injection molding).

Valox 315 Unreinforced, For extrusion/compounding only (not for injection molding).

Valox 325 General purpose, unreinforced, improved processing.

Valox 337 Low temperature impact PBT.

Valox 357 PC/PBT, Impact Modifier, Flame Retardant

Valox 357U Unreinforced PBTP, UL94 V-0/5VA rated. Improved UV resistant version of VALOX 357.

Valox 364 Designed for outdoor telecommunications enclosure applications.

Valox 365 Unreinforced, opaque, provides chemical resistance and dimensional stability.

Valox 3706 Impact modified PBT+PC. Outdoor enclosures. Not available in all colors.

Valox 4012G 10% glass fiber reinforced PBT with excellent mechanical properties.

Valox 420 30% GR, excellent strength, stiffness and dimensional stability. High heat resistance.

Valox 420HP 30% Glass filled PBT resin, FDA Food Contact compliant in limited colors.

Valox 420SE0 30% GR, UL94V-0/5V rated. Numerous applications.

Valox 420SE0U PBT, 30% Glass Reinforced, Flame Retardant UL94 V-0/5VA rated, UV-Stabilized

Valox 430 33 % glass reinforced, impact modified.

Valox 451E 20% GR. Easy flow version of VALOX 451.

Valox 4521 PBT, Glass Fiber, Flame Retardant, UL Grade

Valox 457 6.5% GR PBT, UL94 V-0/5V.

Valox 508 30% GR PBT+PC. Excellent mechanical and thermal performance.

Valox 508R 30% GR PBT+PC. Excellent mechanical and thermal performance.

Valox 553 30% GR PBT+PC, UL94 V-0. Reduced warpage characteristics.Applications.

Valox 553U 30% GR PBT+PC, UL94 V-0. Reduced warpage characteristics.Applications.

Valox 815 15% GR PBT+ PET, excellent surface finish.

Valox 815F PBT+PET, 15% Glass, Mold Release, Heat Stabilized, For Foodcontact applications

Valox 830 30% GR PBTP, excellent surface finish.

Valox 830F PBT+PET, 30% Glass, Mold Release, Heat Stabilized, For foodcontact applications

Valox 855 15% GR PBTP, UL94 V-0 rated. Improved surface appearance.

Valox 865 30% GR PBTP, UL94 V-0 rated. Non-blooming flame retardant.

Valox CS815 15% glass reinforced PBT+PET. Improved heat aged color stability, high surface gloss.

Valox DR48 17% glass reinforced, flame retardant grade UL-94 rated V-0/5VA.

Valox DR51 15% GR polyester, excellent mechanical, thermal and electrical performance.

我公司长期经营SABIC Valox系列PBT，可提供SGS、ROHS、UL黄卡、MSDS、FDA、COC、PDF物性表等各项数据，多年诚信为本，货源稳定、现货库存、质量保证、原厂原包、假一赔十、欢迎来电洽谈！