Monolith 2001: XLPE

What works and what doesn't. Share design ideas, references and contacts for paipo board builders.
B_Wurts
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Monolith 2001: XLPE

#1

Unread post by B_Wurts »

Decided to try shaping a different material for BB/Paipo builds -- high density, cross-linked polyethylene foam. No glassing required. Should be lighter than wood and not too much heavier than stringerless foam with a heavy glassing schedule.

Eliminating glassing should speed up the build/prototyping process. Will try a simple, standard shape to figure out shaping first.

This was the only color available from supplier in this density.

This will be a slow build while I figure out how to shape it.
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Last edited by B_Wurts on Tue Oct 12, 2021 10:57 am, edited 1 time in total.
CHRISPI
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Re: Monolith 2001: XLPE

#2

Unread post by CHRISPI »

what density is it , tends to be expensive but will be a interesting build.
B_Wurts
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Re: Monolith 2001: XLPE

#3

Unread post by B_Wurts »

At 6 pcf, the XLPE foam is lighter than balsa (8-14 pcf). The 6 pcf XLPE is fairly stiff with a little flex. It is more expensive than EPS for sure.

The 6 pcf XLPE sample seemed to sand fairly well -- a bit better than the 6 pcf microcell EVA. I plan to try shaping by hand with coarse sandpaper, wood rasp, surform and hand saw for the first basic-shape.

Got the idea from the 2, 6-pcf EVA swim kickboards I bonded together to get better floatation for pool laps. If I can get the shaping dialed in, I may give the 6 pcf EVA a try -- $50 more expensive per 3" x 24" x 48" slab.
flojo
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Re: Monolith 2001: XLPE

#4

Unread post by flojo »

Mr. Wurt-where do you get that kind of foam and what is it called?

Thanks
B_Wurts
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Re: Monolith 2001: XLPE

#5

Unread post by B_Wurts »

It is closed cell, "Cross-Linked Polyethylene" foam 6-pcf. I got it from an online foam supplier in Michigan.
The other more expensive foam I want to play with is 6-pcf "Mini-cell EVA" (more UV tolerant).
Papa Paepo o
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Re: Monolith 2001: XLPE

#6

Unread post by Papa Paepo o »

I also these type of Cross-Linked Polyethylene Foam as my molds for vacuum bag my Papa Paepo`o Boards. Yes, cutting the foam to the size of board then shaping in your details is the fun part. gottah` got one crazy imagination when your working with polyethylene foam, cause it wont stop there you'll be shaping more foams cause it's easy to shape. I "GOT" 5 Papa Paepo`o Board MOLDS for wood press..
B_Wurts
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Re: Monolith 2001: XLPE

#7

Unread post by B_Wurts »

Interesting! How are you using XLPE as a mold for a paipo "Wood Press?"
I have developed a technology for making blanks for channel bottom BBs/Paipos.
XLPE should work well for building the blanks and prototypes. Just need to come up with a good adhesive that is strong enough to endure the force generated by breaking waves.
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Uncle Grumpy
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Re: Monolith 2001: XLPE

#8

Unread post by Uncle Grumpy »

B_Wurts wrote: Sat Oct 30, 2021 9:41 pm Interesting! How are you using XLPE as a mold for a paipo "Wood Press?"
I have developed a technology for making blanks for channel bottom BBs/Paipos.
XLPE should work well for building the blanks and prototypes. Just need to come up with a good adhesive that is strong enough to endure the force generated by breaking waves.

Barge Cement.
Paipo surfer in repose,
Nose on the nose,
No grunting he-man pose.
See how fast he goes!
What is it he knows?
B_Wurts
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Re: Monolith 2001: XLPE

#9

Unread post by B_Wurts »

Thanks UncleG.
I'll give Barge Cement a try.
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Re: Monolith 2001: XLPE

#10

Unread post by SanCline »

Have you made any progress with this material? I’ve also bought some in the same density and man is it difficult to shape. My most effective tool so far is an angle grinder with a flap disc…
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