Typical Vent Depths

<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> Typical Vent Depths   |   <A HREF="id79.htm" TARGET="_top" TITLE="Recommended Mold Temperatures"><U>Recommended Mold Temperatures</U></A>   |   <A HREF="id82.htm" TARGET="_top" TITLE="Flow Ratios"><U>Flow Ratios</U></A>   |   <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> </td> <td valign="top" height=380 BGCOLOR="#FFFFFF" TEXT="#080000" bgproperties="fixed" background="0e394943.jpg"> <bR> <div> <I>Typical Vent Depths</I></div> <div> <TABLE BORDER="2" CELLPADDING="2" CELLSPACING="1" WIDTH="513" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=CENTER HEIGHT= 32 WIDTH="111"><div> <I><B>Mat</B></I><I><B>e</B></I><I><B>rial</B></I></div> </tD> <tD VALIGN=TOP><NOBR><div> <I><B>Cavity Vent</B></I></div> <div> <I><B>Depth, mm (")</B></I></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="32" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=CENTER WIDTH="129"><div> <I><B>Material</B></I></div> </tD> <tD VALIGN=TOP><NOBR><div> <I><B>Cavity Vent</B></I></div> <div> <I><B>Depth, mm (")</B></I></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 32 WIDTH="111"><bR> <div> ABS</div> </tD> <tD VALIGN=TOP WIDTH="113"><div> 0.051</div> <div> (0.0020)</div> </tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="32" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="129"><bR> <div> Polypropylene</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.038-0.051</div> <div> (0.0015-0.0020)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 33 WIDTH="111"><bR> <div> Acetal</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.025-0.038</div> <div> (0.0010-0.0015)</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="33" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><bR> <div> Polyphenylene oxide</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 0.038-0.051</div> <div> (0.0015-0.0020)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 32 WIDTH="111"><bR> <div> Acrylic</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.038-0.051</div> <div> (0.0015-0.0020)</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="32" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="129"><bR> <div> Polysulfone</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.025-0.038</div> <div> (0.0010-0.0015)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 ><NOBR><div> Cellulose acetate</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 0.025 (0.0010)</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="129"><div> Polystyrene</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.025 (0.0010)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="111"><div> Nylon 6,6</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.013 (0.0005)</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="16" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="129"><div> PVC (rigid)</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.051 (0.0020)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 32 ><NOBR><bR> <div> Polycarbonate</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="113"><div> 0.051</div> <div> (0.0020)</div> </tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="32" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="129"><bR> <div> PVC (flexible)</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.038-0.051</div> <div> (0.0015-0.0020)</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 33 WIDTH="111"><bR> <div> Polyethylene</div> </tD> <tD VALIGN=TOP WIDTH="113"><div> 0.025</div> <div> (0.0010)</div> </tD> <tD VALIGN=TOP WIDTH="8"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="33" ALIGN="bottom" WIDTH="8" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="129"><div> Thermoplastic elastomers</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.038-0.051</div> <div> (0.0015-0.0020)</div> </NOBR></tD> </tR> </TABLE></div> 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