Specific Gravity

<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>   |   <A HREF="id82.htm" TARGET="_top" TITLE="Flow Ratios"><U>Flow Ratios</U></A>   |   Specific Gravity   |   <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>Specific Gravity</I></div> <div> <TABLE BORDER="2" CELLPADDING="2" CELLSPACING="1" WIDTH="540" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=CENTER HEIGHT= 16 WIDTH="171"><div> <I><B>Mat</B></I><I><B>e</B></I><I><B>rial</B></I></div> </tD> <tD VALIGN=TOP WIDTH="82"><div> <I><B>SPG</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="166"><div> <I><B>Material</B></I></div> </tD> <tD VALIGN=TOP WIDTH="77"><div> <I><B>SPG</B></I></div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> ABS</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.01 to 1.08</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> Polycarbonate, unfilled</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.19 to 1.22</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> ABS, FR</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.21</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> Polycarbonate, 20% glass</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="77"><div> 1.35</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="171"><div> Acetal</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.42</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, 30% glass</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="77"><div> 1.43</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 ><NOBR><div> Acetal, 25% glass coupled</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="82"><div> 1.59</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, 40% glass</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="77"><div> 1.52</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Acrylic</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.17 to 1.20</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> Polybutylene terephthalate</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.30 to 1.31</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Alloy, ABS/PC</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.19</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div>  "  ", FR</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.41 to 1.43</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Alloy, ABS/PVC</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.21</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div>  "  ", Glass reinforced</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.42 to 1.60</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Alloy acrylic/PVC</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.28 to 1.35</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div>  "  ", Mineral filled</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.36 to 1.47</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> Cellulose acetate butyrate</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.15 to 1.20</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div>  "  ", Mineral glass reinforced</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.55 to 1.86</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> Cellulose  acetate propionate</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.19 to 1.22</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> Polyethylene, LD</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.91 to .092</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="171"><div> Nylon 6, GP</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.14</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="166"><div> Polyethylene, HD</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.94 to .096</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 16 WIDTH="171"><div> Nylon 6, 30% glass</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.37</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="166"><div> Polyphenylene oxide</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 1.08</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Nylon 11</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.04</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> Polypropylene</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 0.90</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Nylon 12</div> </tD> <tD VALIGN=TOP WIDTH="82"><div> 1.01</div> </tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> Polystyrene, GP</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 1.05</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Nylon 6,6</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.13 to 1.15</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> Polystyrene, high impact</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="77"><div> 1.04</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> Nylon 6,6 reinf. glass fiber</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.37 to 1.41</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> Polysulfone</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 1.24</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Nylon 6,12</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.06 to 1.08</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> Polyurethane</div> </tD> <tD VALIGN=TOP><NOBR><div> 1.11 to 1.25</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> Phenylene oxides (Noryl)</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.06 to 1.10</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> PVC, plasticized</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 1.20</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> Phenylene, glass reinforced</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 1.21 to 1.27</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> PVC, unplasticized</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 1.37</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 WIDTH="171"><div> Polyallomer</div> </tD> <tD VALIGN=TOP><NOBR><div> 0.89 to 0.90</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="4"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="15" ALIGN="bottom" WIDTH="4" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="166"><div> Silicone</div> </tD> <tD VALIGN=TOP WIDTH="77"><div> 1.75</div> </tD> </tR> </TABLE></div> <bR> </td> </tr></table></body>