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src="../../homes/view_left.asp?uid=12667"></SCRIPT> </td></tr> </table> </td> </tr> <tr><td height="10"></td></tr> </table> </td> <td width="10"></td> <td width="742" valign="top" align="center"> <table width="742" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="solid-rw"> <table width="742" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="32" class="center_bg"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="56" align="center"><img src=/homes/images/zhuanzai.gif border=0></td> <td width="567" align="left"><span class="title">‹¹…析聚æ°}酯发泡剂的三大发泡工è‰?/span>   <font color=#999999>(2022/3/9 8:53:54)</font></td> <td width="119" style="font-family:'宋体';"><img src="/space/images/zhuanlan.jpg" align="absmiddle"> <a href="/space/blog_post.asp" class="link3">发表博文</a></td> </tr> </table> </td> </tr> <tr><td height="" valign="top" align="center"> <table width="98%" border="0" cellspacing="0" cellpadding="0" align="left"> <tr> <td height="8"></td> </tr> <tr><td align="center" height="100" valign="top"> <table width="99%" border="0" cellspacing="0" cellpadding="0" align="center"> <tr><td class=red_2 align=left><script src='/homes/Blog_tuijian.asp?Id=135568'></script></td></tr> <tr> <td align="left"> <table width="98%" border="0" cellspacing="0" cellpadding="0" align="center"> <tr> <td class="style_14_666666"> <div class="f401" id="f401"><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> <span style="font-weight:700;">聚æ°}酯发泡剂</span>是气雾技术和聚æ°}酯æˆö沫技术交叉结合的产物。分½Ž¡å¼å’Œæžªå¼ä¸Šä¸¤ç§å‡ºçŽ°‹¹äh£‰çŠ¶æ€ã€‚发泡胶用作微孔泡沫塑料生äñ”的发泡剂åQŒä¸€èˆ¬å¯åˆ†æˆç‰©ç†åž‹å’ŒåŒ–学型两¾c»ï¼Œ˜q™æ˜¯æŒ‰æ°”体的产生是物理过½E?åÏxŒ¥å‘或升华)åQŒè¿˜æ˜¯åŒ–学过½E?卛_Œ–学结构的破坏或其它化学反åº?来划分的。下面就说下常见的聚氨酯发æˆö剂发泡工艺ã€?/p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> <span style="font-weight:700;">一、预聚体æ³?/span></p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> 预聚体法发æˆö工艺是将(白料)å’?黑料)先制成预聚体åQŒç„¶åŽåœ¨é¢„聚体中加入水、催化剂、表面活性剂、其他添加剂½{‰åœ¨é«˜é€Ÿæ…拌下混合˜q›è¡Œå‘æˆöåQŒå›ºåŒ–后在一定温度下熟化卛_¯ã€?/p><p style="text-align:center;font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> <img class="" src="http://www.hiddenhills4sale.com/user/Up_Images/202239852544136844.jpg" alt="" style="height:auto !important;width:656px !important;" width="600" height="388" title="" align="" /></p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> <span style="font-weight:700;">二、半预聚体法</span></p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> 半预聚体法的发æˆö工艺是将部分聚醚多元é†?白料)和二异氰酔R…¯(黑料)先制成预聚体åQŒç„¶åŽå°†å¦ä¸€éƒ¨åˆ†çš„聚醚或聚酯多元醇和二异氰酸酯、水、催化剂、表面活性剂、其他添加剂½{‰åŠ å…¥ï¼Œåœ¨é«˜é€Ÿæ…拌下混合˜q›è¡Œå‘æˆöã€?/p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> <span style="font-weight:700;">三、一步发泡工è‰?/span></p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> ž®†èšé†šæˆ–聚酯多元é†?白料)和多异氰酔R…¯(黑料)、水、催化剂、表面活性剂、发泡剂、其他添加剂½{‰åŽŸæ–™ä¸€æ­¥åŠ å…¥ï¼Œåœ¨é«˜é€Ÿæ…拌下混合后进行发泡ã€?/p><p style="text-align:center;font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> <img class="" src="http://www.hiddenhills4sale.com/user/Up_Images/202239853295733020.jpg" alt="" style="height:auto !important;width:677px !important;" width="600" height="374" title="" align="" /></p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> 一步发泡工艺是普遍采用的工艺。另外还有手工发泡法åQŒé‚£æ˜¯æœ€½Ž€ä¾¿çš„æ–ÒŽ³•åQŒå°†æ‰€æœ‰åŽŸæ–™å‡†¼‹®ç§°é‡åŽåQŒç½®äºŽä¸€ä¸ªå®¹å™¨ä¸­åQŒç„¶åŽç«‹å›_°†˜q™äº›åŽŸæ–™æ··åˆå‡åŒ€åQŒæ³¨å…¥æ¨¡å…ähˆ–需要充填æˆö沫塑料的½Iºé—´ä¸­å³å¯ã€‚注意:¿U°é‡æ—¶ä¸€å®šè¦ž®†å¤šå¼‚æ°°é…”R…¯(黑料)最后称入ã€?/p><p style="font-size:16px;color:#191919;font-family:"background-color:#FFFFFF;"> 聚æ°}酯硬泡一般äؓ室温发æˆöåQŒæˆåž‹å·¥è‰ºæ¯”较简单。按施工机械化程度可分äؓ手工发æˆö及机械发æ³?按发泡时的压力可分äؓ高压发æˆö及低压发æ³?按成型方式可分äؓ‹¹‡æ³¨å‘æˆö及喷涂发泡ã€?/p><p 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