Flow Ratios

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=100 BGCOLOR="#CCCCFF" TEXT="#080000" bgproperties="fixed" background="0e394943.jpg"> <div> <B>Plastics 101</B><B> </B><FONT SIZE="1" COLOR="#555555" FACE="Arial" ><B>    |     </B><A HREF="index.htm" TARGET="_top" TITLE="Plastics 101"><U><B>home</B></U></A></FONT></div> <div> <A HREF="id80.htm" TARGET="_top" TITLE="Typical Vent Depths"><U>Typical Vent Depths</U></A>   |   <A HREF="id79.htm" TARGET="_top" TITLE="Recommended Mold Temperatures"><U>Recommended Mold Temperatures</U></A>   |   Flow Ratios   |   <A HREF="id83.htm" TARGET="_top" TITLE="Specific Gravity"><U>Specific Gravity</U></A>   |   <A HREF="id81.htm" TARGET="_top" TITLE="Drying Temperatures"><U>Drying Temperatures</U></A></div> <div> <B><IMG SRC="0eee80a0.jpg" border=0 width="1000" height="10" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div> </div> </td> </tr><tr> <td valign="top" width=200 BGCOLOR="#660000" TEXT="#F7F7FF"> <div> <B><IMG BORDER="0" SRC="Wing0a7300a80168ffffff00.png" HEIGHT="24" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Tech Tips</B></div> <bR> </td> <td valign="top" height=380 BGCOLOR="#FFFFFF" TEXT="#080000" bgproperties="fixed" background="0e394943.jpg"> <bR> <div> <I>Flow Ratios</I></div> <div> <TABLE BORDER="2" CELLPADDING="2" CELLSPACING="1" WIDTH="460" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=CENTER HEIGHT= 16 WIDTH="92"><div> <I><B>Mat</B></I><I><B>e</B></I><I><B>rial</B></I></div> </tD> <tD VALIGN=TOP WIDTH="107"><div> <I><B>Flow Ratio</B></I></div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="113"><div> <I><B>Material</B></I></div> </tD> <tD VALIGN=TOP WIDTH="104"><div> <I><B>Flow Ratio</B></I></div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="92"><div> ABS</div> </tD> <tD VALIGN=TOP WIDTH="107"><div> 175:1</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> Polycarbonate</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="104"><div> 100:1</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="92"><div> Acetal</div> </tD> <tD VALIGN=TOP WIDTH="107"><div> 140:1</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="113"><div> Polyethylene</div> </tD> <tD VALIGN=TOP WIDTH="104"><div> 225:1</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="92"><div> Acrylic</div> </tD> <tD VALIGN=TOP WIDTH="107"><div> 130:1</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="113"><div> Polypropylene</div> </tD> <tD VALIGN=TOP WIDTH="104"><div> 250:1</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="92"><div> Elastomers</div> </tD> <tD VALIGN=TOP WIDTH="107"><div> 180:1</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="113"><div> Polystyrene</div> </tD> <tD VALIGN=TOP WIDTH="104"><div> 225:1</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="92"><div> Nylon</div> </tD> <tD VALIGN=TOP WIDTH="107"><div> 150:1</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="113"><div> PVC (rigid)</div> </tD> <tD VALIGN=TOP WIDTH="104"><div> 100:1</div> </tD> </tR> </TABLE></div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.png" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">All thermoplastics have a maximum flow ratio (flow length/average part thickness).</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700c800000000.png" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Table indicates approximate maximums for some materials.</div> </td> </tr></table></body>