贴片胶、红胶、贴片红胶粘度受影响的三大因素
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 20.9pt; LINE-HEIGHT: 180%; mso-para-margin-left: 1.99gd;"><b><span style="LINE-HEIGHT: 180%; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 13.5pt;">贴片胶、红胶、贴片红胶粘度受影响的三大因素</span></b><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="FONT-FAMILY: 新宋体;"><p></p></span></b></p><p style="TEXT-JUSTIFY: inter-ideograph; TEXT-INDENT: 18pt; LINE-HEIGHT: 16.5pt; TEXT-ALIGN: justify; mso-char-indent-count: 2.0;"><font face="宋体"><span lang="EN-US" style="FONT-SIZE: 9pt;">UNINWELL</span><span style="FONT-SIZE: 9pt;">国际作为世界高端电子胶粘剂的领导品牌，其开发的系列产品包括导电银胶、红胶、底部填充胶、<span lang="EN-US">TUFFY</span>胶、<span lang="EN-US">LCM</span>密封胶等。公司在全球拥有几十家世界五百强企业客户，最近，<span lang="EN-US">UNINWELL</span>国际与上海常祥实业强强联合，共同开发中国高端电子胶粘剂市场。</span></font><span style="FONT-SIZE: 9pt; FONT-FAMILY: 新宋体; mso-bidi-font-size: 10.5pt;">上海常祥实业有限公司根据</span><font face="宋体"><span style="FONT-SIZE: 9pt; mso-ascii-font-family: ???; mso-hansi-font-family: ???;">自己生产的贴片胶的经验，结合世界顶级客户的使用工艺，</span><span style="FONT-SIZE: 9pt;">总结出影响贴片胶的因素，供使用贴片胶的朋友参考。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p> </p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: -18pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">1</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">．温度对黏度的影响</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: 13.5pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-char-indent-count: 1.5; mso-pagination: widow-orphan;"><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">温度是影响贴片胶黏度的最关键因素。根据上海常祥实业实验中心的测试数据表明：温度提高了</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="7" unitname="℃"><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">7</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">℃</span></chmetcnv><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">，黏度下降了原来的</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">40%</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">。在生产中当黏度下降时，就意味着针管点出的贴片胶量增加，而</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">PCB</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">上胶点的高度却下降，所以点胶的环境温度应是恒定的，一般维持在</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="25" unitname="℃"><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">25</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">℃</span></chmetcnv><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">左右，以确保最理想的胶点形状。</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: -18pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">2</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">．在压力对黏度的影响</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: 21pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">在用压力点胶涂布工艺中，压力的增加意味着胶液通过注射器出口嘴的速度的增高，也就是说，剪切速率增高，通常在生产中点胶机的压力控制在</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">5bar</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">（</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">1bar=1kPa</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">）之内，一般设在一个中央值</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">3.0-3.5bar</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">，高的压力会因剪切速率的提高，使针管头发热，引起贴片胶性能变差。</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: -18pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;">3</span><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">．在时间对黏度的影响</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: 18pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-pagination: widow-orphan;"><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">时间影响关键是贴片胶的保存时间，假设贴片胶超过保存期，黏度会升高。这属于时间对黏胶剂的黏度的间接影响。但在注射点胶工艺中它能影响出胶量，时间增长，出胶量变大。</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-INDENT: 18.25pt; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-size: 10.5pt;">由此可见影响贴片胶黏度变化的因素主要是温度和压力，建议我们的客户在实际生产中应特别关注这两个因素的变化</span><span lang="EN-US" style="FONT-SIZE: 9pt; LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span lang="EN-US" style="COLOR: #333333; LINE-HEIGHT: 180%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p> </p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 180%;"><span lang="EN-US" style="COLOR: #333333; LINE-HEIGHT: 180%; FONT-FAMILY: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p> </p></span></p> 不错,顶一下！感谢楼主！ <p>请教楼主,我司现在外面贴片回来后,掉贴片太严重了,很多桥堆,二极管都掉的啊.</p><p>贴片厂家推PCB厂家,PCB厂家推贴片厂家.</p><p>具体现象是:掉的贴片上大部分有红胶的痕迹,当然也有没有的.PCB上有的绿油完全没了,露出白色的底色.</p><p>请教这是什么原因造成的啊?? 这批板子在仓库放了7天左右才那出来插件的.</p><p></p> 是不是PCB安放时间过长 不错,顶一下！感谢楼主！ 不错,正是我需要,谢谢
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