3D/Core XPS Vs Divinycell H80 ( with table comparison)

3d/Core materials have been discussed previously. DOWNLOADS https://3d-core.com/en/downloads.html
A direct comparison between the 3d/core XPS and standard PVC foam hasn't been done. I took my time to compare the data sheets which are presented below.

I compared the XPS product to a Divinycell H80 because of its ligthweigth at 45kg/m3, compared to 80kg/m3 of Divinycell, which by the way is the foam used in Duflex panels.


The 3d core of the panel is given by a 3d void mesh that is filled by epoxy during the infusion process, similar to PVC slotted and perforated.
https://3d-core.com/media/colrightarticle_pdf/TDS_3D_CORE_XPS_englisch.pdf
I think the results speak for themselves, highly in favour of XPS 3D core. For a similar shear strength we have 4 times compression strength.

- XPS should be cheaper than PVC ( to confirm with manufacturer quote)
- XPS is 45kg/m3 against 80kg/m3
- XPS doesn't like gasoline - to be used above waterline away from tanks

What I cannot find is the amount of resin absorbed by PVC foam during a typical infusion process.
Does anyone have that information at hand, perhaps from experience?
For XPS in Hexagon core we have 40g/m2/mm, so for a 20mm panel we should have 800g/m2 resin absorption.

Any other reason to avoid XPS over PVC?

 

Something is wrong here.

If the core is open, then it would take a lot more resin to fill.

You have to compare total uptake, not surface only for one.

use 0.6 kg/m^2 for pvc

Should add, you can only infuse those open pore products. So, that changes things a bit as well. But figure some resin cost challenges; especially for epoxy.

the other thing is I only saw it to 10mm, very few larger hulls will spec below 12mm

 

The resin uptake is given per mm of thickness, so for a 10mm panel we have 40x10= 400grams of resin per square meter. This is not the surface uptake, is the total resin absorption of the material.

I guess this is for standard PVC? For slotted and perforated PVC foam the intake should higher no?
I don't know about your last statement, but this is a product designed specifically for vacuum infusion..

 

Doesn't like gasoline ? I don't like the sound of it. Is this some variety of polystyrene ?

 

Stefano, your data is flawed. From the 3D TDS you used the values for "hybrid". If you look closely there is a small 2 next to "hybrid" and a note that says: "hybrid" means 20mm fiberglass epoxy sandwich panels.
You are comparing the H80 bare foam numbers to epoxy fiberglass laminated XPS.
The 3D XPS is good for furniture, not hulls.

 

Rumars, I would say that 3D could have done a better job describing it unambiguously as they use the words "sandwich panels" which would make you think there's a sandwich made. But that would not make much sense coming from a technical supplier, I assume the marketing guys are not allowed to pull such tricks when it comes to technical characteristics. They explicitly mention the text in bold;

So it should be a clear comparison to the 700N/mm2 base material....