SMALL - Telemetry SMALL - Radio
Thread Tools
Old Jun 13, 2014, 06:36 PM
roobee is offline
Find More Posts by roobee
Registered User
Joined Jun 2014
48 Posts
Discussion
What does epp mean?

What does epp mean?
roobee is offline Find More Posts by roobee
Reply With Quote
Sign up now
to remove ads between posts
Old Jun 13, 2014, 06:40 PM
Granted is offline
Find More Posts by Granted
serial scratchbuilder
Granted's Avatar
Canada, BC, Mission
Joined Sep 2012
1,741 Posts
Expanded polypropylene.
Granted is offline Find More Posts by Granted
Reply With Quote
Old Jun 13, 2014, 06:43 PM
madfisherman is offline
Find More Posts by madfisherman
Registered User
Pacific Northwest, USA
Joined Oct 2004
365 Posts
The below is a cut and paste from an old posting on this web site:

EPS stands for expanded polystyrene, otherwise know as styrofoam. Depron, fan fold foam, sturdiboard, and the blue and pink foams found at home centers, are all EPS. This foam is easy to cut, fairly easy to sand, fairly rigid, fairly brittle (cracks easily) and not very durable. If you press your fingernail into it, it will leave a permanent crease. If you hold a very small piece over a match, it will just collapse and dissappear. Regular CA glue will melt this foam, as will some types of spray adhesives and spray paints. Use foam safe CA on EPS foam. See this thread for glues that work on EPS:


EPP stands for expanded polypropylene. I know of no trades names for this foam other than EPP. This foam is more difficult to cut, very hard to sand, less rigid than EPS and much much more durable. If you press your fingernail into it, the dent will almost totally dissappear. If you hold a very small piece over a match, it will catch fire and burn. You can use any type of adhesive or paint on EPP, as long as it sticks. From my limited testing, polyurethane glues work the best on EPP, but epoxy, CA and many contact adhesives also work well.
madfisherman is offline Find More Posts by madfisherman
Reply With Quote
Old Jun 13, 2014, 07:07 PM
birdofplay is offline
Find More Posts by birdofplay
Registered User
birdofplay's Avatar
United States, IN, Indianapolis
Joined Dec 2005
9,314 Posts
EXPANDED implys that the raw beads are per-expanded to a density close to what
is expected in the final product.
Then those beads are injected into a mold where the heat expands them to the final density and fuses them all together.
Typically a Steam heat.

XPS or extruded polystyrene

EXTRUDED is a completely different process and results in a more homogeneous
and smoother end product.
birdofplay is offline Find More Posts by birdofplay
Reply With Quote
Old Jun 18, 2014, 06:58 PM
Sixter is offline
Find More Posts by Sixter
Flying Models for 52 Years!
Sixter's Avatar
Georgia, United States
Joined Oct 2002
880 Posts
EPP means Light Weight, Tough, Withstands Crashes, Easy to Repair, Easy to work with and in my opinion the Best all around Foam for RC Models with 36" Wingspans or less.

Bobby
Sixter is offline Find More Posts by Sixter
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Help! What does watts mean in brushless motors? Kavindu.wick Multirotor Electronics 3 Jan 09, 2015 12:15 AM
Discussion "UBEC" - What does it mean on Hobbyking product pages? kaon Power Systems 10 Nov 21, 2013 12:14 PM
Discussion What does "disser" mean? Itchy Thumbs Hand Launch 9 Oct 29, 2013 08:38 PM
Discussion DJI is having lots of promotions - What does it mean? BenHayat Multirotor Talk 12 Sep 23, 2013 08:01 PM
EPS,EPP,BluCor and what does 1# density mean? Balin Foamies (Kits) 0 Apr 24, 2002 05:35 PM