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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