[PSUBS-MAILIST] alternative syntactic foam

[hank pronk via Personal_Submersibles]

Aan,I have been looking at that on eBay, even just for experimenting.  Hank 

    On Sunday, June 18, 2017 7:51 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Hank,have you had a look at this stuff...http://www.ebay.com/itm/MICROSPHERES-GLASS-BUBBLES-LOW-DENSITY-EPOXY-SYNTACTIC-FOAM-FILLER-1-GAL-1-5-KIT-/220528963762One gallon in volume for $18:72. It says it crushes to 90% of it's volume at 5500 psi.And yes, enjoy a bit of detective work.Cheers Alan

Sent from my iPad
On 19/06/2017, at 12:19 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:


Hi All,Just been thinking  about low cost ways to make foam.  I am sure at the end of the day, I will make my foam the standard way, but it is still an interesting subject to explore.  I have learned that microspheres are added to many things, even concrete.  That got me thinking, if the compressive strength is there, the best product to reinforce the spheres should be the lightest possible material.  Polypropylene is very light and has a compressive strength of 6,000 psi.  The fun part about Polypropylene is, it can be recycled from bottle lids etc.  I don't think it would take to much imagination to build an oven with a mixer inside and a microsphere injection port.  Polypropylene has a specific gravity in the neighbourhood of .7g\cc that means a light weight foam can be made with microspheres and no macro spheres.    I don't know about the water absorption properties yet.Hank

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20170619/ace6f73c/attachment.html>