<div dir="ltr"><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:large;color:#000000">TMI bill w</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Nov 19, 2020 at 5:58 PM spike jones via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US" style="overflow-wrap: break-word;"><div class="gmail-m_-7643308444424267865WordSection1"><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="font-size:18pt;font-family:"Comic Sans MS"">>>…Regarding the seams on your shampoo bottle and milk jug, what did you see?</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:18pt;font-family:"Comic Sans MS"">spike</span><u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in"><p class="MsoNormal">> <b>On Behalf Of </b>William Flynn Wallace via extropy-chat<br><b>Subject:</b> Re: [ExI] plastic turkeys<u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal"><span style="font-size:18pt;font-family:"Comic Sans MS"">>…<span style="color:black">See? Nothing that I can make sense of. bill w<u></u><u></u></span></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="font-size:14pt">If you put that seam under a microscope, it would look like a ridge but not a groove. This is important, for that seam is the site on which two similar mold halves were fused together. The reason that is important is that there is more material along the fusion site than elsewhere, for that process of fusing the two pieces after the initial thermal-setting does not create the same number of bonds as the initial injection mold process.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt">If you take an empty milk jug, fill it with water, take it out in the front yard and hurl it into the air, good chance it will not rupture. You will come away with new respect for ABS: marvelous stuff. But if you take it up to the fourth floor and hurl it to the ground, it will rupture. If those seams did not contain extra material, the jug would rupture into two halves along that seam. So… they compression-fuse it in such a way that there is more material on the seam.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt">Next, note that the two fused pieces are mirror images. This is done for a reason. If a weak spot from stress concentration in one side is discovered, the other side has that too for the same reason. Both can be fixed by the same process.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt">Lesson: there is a lot of science in ABS plastic. The guy who designs the mold to create those plastic turkeys has a great job. She gets to use science and engineering in her job every day.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:14pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:14pt">spike<u></u><u></u></span></p></div></div>_______________________________________________<br>
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