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General control line discussion => Open Forum => Topic started by: Rob Killick on June 07, 2009, 04:08:31 PM

Title: EPS foam ?
Post by: Rob Killick on June 07, 2009, 04:08:31 PM

Hi ,

I want to cut some foam wings , but I need to know what the proper name and density for the type of material I need .
Anyone up on the technical jargon for the type of foam I need  (so I don't purchase the wrong stuff) ?
I have to buy the product "unseen" , so I want to give the manufacturer the correct details .

Thanks ,

Rob Killick

Title: Re: EPS foam ?
Post by: phil c on June 07, 2009, 06:15:54 PM

EPS is expanded polystyrene, which can mean stuff like DuPont Styrofoam(blue foam 2lb. density) and similar stuff or the white expanded beadboard.  If you can, get the foam called EIFS(External Insulation and Finishing System).  This stuff is an industry standard, virgin, white beadboard that meets stringent specs for density, uniformity, and consolidation.  It may cost more, and it may only be available in large quantities by special order.

If you can't get the EIFS foam, look for any white beadboard <1 lb. density and at least 2 in. thick.  Any thinner and it will probably have to be laminated.  Ideally the surface of the block will be fairly smooth and not show any grooves or stuff sticking out(regrind).  Foam with regrind in it will drive you nuts trying to get a set of nice cores.  The really bad stuff has sawdust, wood splinters, cardboard, and other junk in it.

Title: Re: EPS foam ?
Post by: Rob Killick on June 07, 2009, 06:44:18 PM

Hi Phil ,

Thanks for the help . That will be something to look for .

Thanks again ,

Rob Killick

Title: Re: EPS foam ?
Post by: Howard Rush on June 08, 2009, 05:12:16 PM

Phil knows his foam.  I would add "virgin" to your specification.  Sounds like this is redundant for EIFS, but it will help ensure that the foam doesn't have boogers in it. 

When we had Yellow Pages, I found foam under "refractory materials"

Title: Re: EPS foam ?
Post by: Brad LaPointe on June 08, 2009, 05:57:29 PM

Phil,
   Styrofoam is a Dow product,unless they sold that too.I used to work in the polystyrene unit in Sarnia.If the smell of cutting cores disagrees with you ,never work in polystyrene plant.Trust me.I would avoid breathing too much of the fumes if possible.Benzine is used as one of the components in the feed stock .Just letting you know.High temps release a lot of chemicals ,use good ventilation.

Brad LaPointe