技术交流 › 金属材料论坛 › 多种注塑塑料性能分析（二）

HEATS 发表于 2010-9-12 16:34:52

多种注塑塑料性能分析（二）

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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">5.PBT</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">聚对苯二甲酸丁二醇酯<SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">典型应用范围<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">家用器具<SPAN lang=EN-US>(</SPAN>食品加工刀片、真空吸尘器元件、电风扇、头发干燥机壳体、咖啡器皿等<SPAN lang=EN-US>)</SPAN>，电器元件<SPAN lang=EN-US>(</SPAN>开关、电机壳、保险丝盒、计算机键盘按键等<SPAN lang=EN-US>)</SPAN>，汽车工业<SPAN lang=EN-US>(</SPAN>散热器格窗、车身嵌板、车轮盖、门窗部件等<SPAN lang=EN-US>)</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注塑模工艺条件<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">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<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="120" UnitName="℃"><SPAN lang=EN-US>120</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>，<SPAN lang=EN-US>6~8</SPAN>小时，或者<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="150" UnitName="℃"><SPAN lang=EN-US>150</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>，<SPAN lang=EN-US>2~4</SPAN>小时。湿度必须小于<SPAN lang=EN-US>0.03%</SPAN>。如果用吸湿干燥器干燥，建议条件为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="150" UnitName="℃"><SPAN lang=EN-US>150</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>，<SPAN lang=EN-US>2.5</SPAN>小时。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">熔化温度：<SPAN lang=EN-US>225~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="275" UnitName="℃">275<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>，建议温度：<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="250" UnitName="℃"><SPAN lang=EN-US>250</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">模具温度：对于未增强型的材料为<SPAN lang=EN-US>40~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="60" UnitName="℃">60<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。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<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="12" UnitName="mm"><SPAN lang=EN-US>12mm</SPAN></st1:chmetcnv>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射压力：中等<SPAN lang=EN-US>(</SPAN>最大到<SPAN lang=EN-US>1500bar)</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射速度：应使用尽可能快的注射速度<SPAN lang=EN-US>(</SPAN>因为<SPAN lang=EN-US>PBT</SPAN>的凝固很快<SPAN lang=EN-US>)</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">流道和浇口<SPAN lang=EN-US>:</SPAN>建议使用圆形流道以增加压力的传递<SPAN lang=EN-US>(</SPAN>经验公式：流道直径<SPAN lang=EN-US>=</SPAN>塑件厚度<SPAN lang=EN-US>+<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="1.5" UnitName="mm">1.5mm</st1:chmetcnv>)</SPAN>。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<SPAN lang=EN-US>0.8~1.0*t</SPAN>之间，这里<SPAN lang=EN-US>t</SPAN>是塑件厚度。如果是潜入式浇口，建议最小直径为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue=".75" UnitName="mm"><SPAN lang=EN-US>0.75mm</SPAN></st1:chmetcnv>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">化学和物理特性<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">PBT</SPAN><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">是最坚韧的工程热塑材料之一，它是半结晶材料，有非常好的化学稳定性、机械强度、电绝缘特性和热稳定性。这些材料在很广的环境条件下都有很好的稳定性。<SPAN lang=EN-US>PBT</SPAN>吸湿特性很弱。非增强型<SPAN lang=EN-US>PBT</SPAN>的张力强度为<SPAN lang=EN-US>50MPa</SPAN>，玻璃添加剂型的<SPAN lang=EN-US>PBT</SPAN>张力强度为<SPAN lang=EN-US>170MPa</SPAN>。玻璃添加剂过多将导致材料变脆。<SPAN lang=EN-US>PBT</SPAN>的；结晶很迅速，这将导致因冷却不均匀而造成弯曲变形。对于有玻璃添加剂类型的材料，流程方向的收缩率可以减小，但与流程垂直方向的收缩率基本上和普通材料没有区别。一般材料收缩率在<SPAN lang=EN-US>1.5%~2.8%</SPAN>之间。含<SPAN lang=EN-US>30%</SPAN>玻璃添加剂的材料收缩<SPAN lang=EN-US>0.3%~1.6%</SPAN>之间。熔点<SPAN lang=EN-US>(<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="225" UnitName="℃">225<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv>)</SPAN>和高温变形温度都比<SPAN lang=EN-US>PET</SPAN>材料要低。维卡软化温度大约为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="170" UnitName="℃"><SPAN lang=EN-US>170</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>。玻璃化转换温度<SPAN lang=EN-US>(glass trasitio temperature)</SPAN>在<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="22" UnitName="℃"><SPAN lang=EN-US>22</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>到<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="43" UnitName="℃"><SPAN lang=EN-US>43</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>之间。由于<SPAN lang=EN-US>PBT</SPAN>的结晶速度很高，因此它的粘性很低，塑件加工的周期时间一般也较低。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">6.PC</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">聚碳酸酯<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">典型应用范围<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">电气和商业设备<SPAN lang=EN-US>(</SPAN>计算机元件、连接器等<SPAN lang=EN-US>)</SPAN>，器具<SPAN lang=EN-US>(</SPAN>食品加工机、电冰箱抽屉等<SPAN lang=EN-US>)</SPAN>，交通运输行业<SPAN lang=EN-US>(</SPAN>车辆的前后灯、仪表板等<SPAN lang=EN-US>)</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注塑模工艺条件<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">干燥处理：<SPAN lang=EN-US>PC</SPAN>材料具有吸湿性，加工前的干燥很重要。建议干燥条件为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="100" UnitName="℃"><SPAN lang=EN-US>100</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>到<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="200" UnitName="℃"><SPAN lang=EN-US>200</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>，<SPAN lang=EN-US>3~4</SPAN>小时。加工前的湿度必须小于<SPAN lang=EN-US>0.02%</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">熔化温度：<SPAN lang=EN-US>260~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="340" UnitName="℃">340<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">模具温度：<SPAN lang=EN-US>70~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="120" UnitName="℃">120<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射压力：尽可能地使用高注射压力。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射速度：对于较小的浇口使用低速注射，对其它类型的浇口使用高速注射。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">化学和物理特性<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">PC</SPAN><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">是一种非晶体工程材料，具有特别好的抗冲击强度、热稳定性、光泽度、抑制细菌特性、阻燃特性以及抗污染性。<SPAN lang=EN-US>PC</SPAN>的缺口伊估德冲击强度<SPAN lang=EN-US>(otched Izod impact stregth)</SPAN>非常高，并且收缩率很低，一般为<SPAN lang=EN-US>0.1%~0.2%</SPAN>。<SPAN lang=EN-US>PC</SPAN>有很好的机械特性，但流动特性较差，因此这种材料的注塑过程较困难。在选用何种品质的<SPAN lang=EN-US>PC</SPAN>材料时，要以产品的最终期望为基准。如果塑件要求有较高的抗冲击性，那么就使用低流动率的<SPAN lang=EN-US>PC</SPAN>材料；反之，可以使用高流动率的<SPAN lang=EN-US>PC</SPAN>材料，这样可以优化注塑过程。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">7.PC/ABS</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">聚碳酸酯和丙烯腈<SPAN lang=EN-US>-</SPAN>丁二烯<SPAN lang=EN-US>-</SPAN>苯乙烯共聚物和混合物<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">典型应用范围<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">计算机和商业机器的壳体、电器设备、草坪和园艺机器、汽车零件<SPAN lang=EN-US>(</SPAN>仪表板、内部装修以及车轮盖<SPAN lang=EN-US>)</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注塑模工艺条件<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">干燥处理：加工前的干燥处理是必须的。湿度应小于<SPAN lang=EN-US>0.04%</SPAN>，建议干燥条件为<SPAN lang=EN-US>90~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="110" UnitName="℃">110<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>，<SPAN lang=EN-US>2~4</SPAN>小时。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">熔化温度：<SPAN lang=EN-US>230~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="300" UnitName="℃">300<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">模具温度：<SPAN lang=EN-US>50~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="100" UnitName="℃">100<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射压力：取决于塑件。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射速度：尽可能地高。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">化学和物理特性<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">PC/ABS</SPAN><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">具有<SPAN lang=EN-US>PC</SPAN>和<SPAN lang=EN-US>ABS</SPAN>两者的综合特性。例如<SPAN lang=EN-US>ABS</SPAN>的易加工特性和<SPAN lang=EN-US>PC</SPAN>的优良机械特性和热稳定性。二者的比率将影响<SPAN lang=EN-US>PC/ABS</SPAN>材料的热稳定性。<SPAN lang=EN-US>PC/ABS</SPAN>这种混合材料还显示了优异的流动特性。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">8.PC/PBT</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">聚碳酸酯和聚对苯二甲酸丁二醇酯的混合物<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">典型应用范围<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">齿轮箱、汽车保险杠以及要求具有抗化学反应和耐腐蚀性、热稳定性、抗冲击性以及几何稳定性的产品。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注塑模工艺条件<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">干燥处理：建议<SPAN lang=EN-US>110~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="135" UnitName="℃">135<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv>,</SPAN>约<SPAN lang=EN-US>4</SPAN>小时的干燥处理。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">熔化温度：<SPAN lang=EN-US>235~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="300" UnitName="℃">300<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">模具温度：<SPAN lang=EN-US>37~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="93" UnitName="℃">93<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">化学和物理特性<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">PC/PBT</SPAN><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">具有<SPAN lang=EN-US>PC</SPAN>和<SPAN lang=EN-US>PBT</SPAN>二者的综合特性，例如<SPAN lang=EN-US>PC</SPAN>的高韧性和几何稳定性以及<SPAN lang=EN-US>PBT</SPAN>的化学稳定性、热稳定性和润滑特性等。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">9.PE-HD</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">高密度聚乙烯<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">典型应用范围<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">电冰箱容器、存储容器、家用厨具、密封盖等。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注塑模工艺条件<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">干燥：如果存储恰当则无须干燥。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">熔化温度：<SPAN lang=EN-US>220~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="260" UnitName="℃">260<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。对于分子较大的材料，建议熔化温度范围在<SPAN lang=EN-US>200~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="250" UnitName="℃">250<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>之间。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">模具温度：<SPAN lang=EN-US>50~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="95" UnitName="℃">95<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>。<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="6" UnitName="mm"><SPAN lang=EN-US>6mm</SPAN></st1:chmetcnv>以下壁厚的塑件应使用较高的模具温度，<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="6" UnitName="mm"><SPAN lang=EN-US>6mm</SPAN></st1:chmetcnv>以上壁厚的塑件使用较低的模具温度。塑件冷却温度应当均匀以减小收缩率的差异。对于最优的加工周期时间，冷却腔道直径应不小于<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="8" UnitName="mm"><SPAN lang=EN-US>8mm</SPAN></st1:chmetcnv>，并且距模具表面的距离应在<SPAN lang=EN-US>1.3d</SPAN>之内<SPAN lang=EN-US>(</SPAN>这里<SPAN lang=EN-US>“d”</SPAN>是冷却腔道的直径<SPAN lang=EN-US>)</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射压力：<SPAN lang=EN-US>700~1050bar</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射速度：建议使用高速注射。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">流道和浇口：流道直径在<SPAN lang=EN-US>4</SPAN>到<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="7.5" UnitName="mm"><SPAN lang=EN-US>7.5mm</SPAN></st1:chmetcnv>之间，流道长度应尽可能短。可以使用各种类型的浇口，浇口长度不要超过<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue=".75" UnitName="mm"><SPAN lang=EN-US>0.75mm</SPAN></st1:chmetcnv>。特别适用于使用热流道模具。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">化学和物理特性<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">PE-HD</SPAN><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">的高结晶度导致了它的高密度，抗张力强度，高温扭曲温度，粘性以及化学稳定性。<SPAN lang=EN-US>PE-HD</SPAN>比<SPAN lang=EN-US>PE-LD</SPAN>有更强的抗渗透性。<SPAN lang=EN-US>PE-HD</SPAN>的抗冲击强度较低。<SPAN lang=EN-US>PH-HD</SPAN>的特性主要由密度和分子量分布所控制。适用于注塑模的<SPAN lang=EN-US>PE-HD</SPAN>分子量分布很窄。对于密度为<SPAN lang=EN-US>0.91~ <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue=".925" UnitName="g">0.925g</st1:chmetcnv>/cm3</SPAN>，我们称之为第一类型<SPAN lang=EN-US>PE-HD</SPAN>；对于密度为<SPAN lang=EN-US>0.926~ <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue=".94" UnitName="g">0.94g</st1:chmetcnv>/cm3</SPAN>，称之为第二类型<SPAN lang=EN-US>PE-HD</SPAN>；对于密度为<SPAN lang=EN-US>0.94~ <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue=".965" UnitName="g">0.965g</st1:chmetcnv>/cm3</SPAN>，称之为第三类型<SPAN lang=EN-US>PE-HD</SPAN>。该材料的流动特性很好，<SPAN lang=EN-US>MFR</SPAN>为<SPAN lang=EN-US>0.1</SPAN>到<SPAN lang=EN-US>28</SPAN>之间。分子量越高，<SPAN lang=EN-US>PH-LD</SPAN>的流动特性越差，但是有更好的抗冲击强度。<SPAN lang=EN-US>PE-LD</SPAN>是半结晶材料，成型后收缩率较高，在<SPAN lang=EN-US>1.5%</SPAN>到<SPAN lang=EN-US>4%</SPAN>之间。<SPAN lang=EN-US>PE-HD</SPAN>很容易发生环境应力开裂现象。可以通过使用很低流动特性的材料以减小内部应力，从而减轻开裂现象。<SPAN lang=EN-US>PE-HD</SPAN>当温度高于<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="60" UnitName="℃"><SPAN lang=EN-US>60</SPAN><SPAN style="mso-bidi-font-family: 宋体">℃</SPAN></st1:chmetcnv>时很容易在烃类溶剂中溶解，但其抗溶解性比<SPAN lang=EN-US>PE-LD</SPAN>还要好一些。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">10.PE-LD</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">低密度聚乙烯<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">典型应用范围<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">碗，箱柜，管道联接器<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注塑模工艺条件<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">干燥：一般不需要<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">熔化温度：<SPAN lang=EN-US>180~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="280" UnitName="℃">280<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">模具温度：<SPAN lang=EN-US>20~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="40" UnitName="℃">40<SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN lang=EN-US>℃</SPAN></SPAN></st1:chmetcnv></SPAN>，为了实现冷却均匀以及较为经济的去热，建议冷却腔道直径至少为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="8" UnitName="mm"><SPAN lang=EN-US>8mm</SPAN></st1:chmetcnv>，并且从冷却腔道到模具表面的距离不要超过冷却腔道直径的<SPAN lang=EN-US>1.5</SPAN>倍。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射压力：最大可到<SPAN lang=EN-US>1500bar</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">保压压力：最大可到<SPAN lang=EN-US>750bar</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注射速度：建议使用快速注射速度。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">流道和浇口：可以使用各种类型的流道和浇口。<SPAN lang=EN-US>PE-LD</SPAN>特别适合于使用热流道模具。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">化学和物理特性<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">商业用的<SPAN lang=EN-US>PE-LD</SPAN>材料的密度为<SPAN lang=EN-US>0.91~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue=".94" UnitName="g">0.94 g</st1:chmetcnv>/cm3</SPAN>。<SPAN lang=EN-US>PE-LD</SPAN>对气体和水蒸汽具有渗透性。<SPAN lang=EN-US>PE-LD</SPAN>的热膨胀系数很高不适合于加工长期使用的制品。如果<SPAN lang=EN-US>PE-LD</SPAN>的密度在<SPAN lang=EN-US>0.91~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue=".925" UnitName="g">0.925 g</st1:chmetcnv>/cm3</SPAN>之间，那么其收缩率在<SPAN lang=EN-US>2%~5%</SPAN>之间；如果密度在<SPAN lang=EN-US>0.926~<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue=".94" UnitName="g">0.94 g</st1:chmetcnv>/cm3</SPAN>之间，那么其收缩率在<SPAN lang=EN-US>1.5%~4%</SPAN>之间。当前实际的收缩率还要取决于注塑工艺参数。<SPAN lang=EN-US>PE-LD</SPAN>在室温下可以抵抗多种溶剂，但是芳香烃和氯化烃溶剂可使其膨胀。同<SPAN lang=EN-US>PE-HD</SPAN>类似，<SPAN lang=EN-US>PE-LD</SPAN>容易发生环境应力开裂现象。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; mso-char-indent-count: 2.0"><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
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