It is all too easy to guess the amount of resin required for a project incorrectly, resulting in either wasting expensive resin or running out of resin during infusion, a quick calculation before you mix the resin can save you time and money. This information relates to a standard resin infusion using flow mesh and no material stacks with cores (such as Soric) these will have different resin usage and this should be accounted for.

With Resin infusion you are normally looking to achieve a 60/40 fibre/resin ratio, this means for every, say, 100grams of cloth you will need 66 grams of resin, all of the reinforcements are listed by weight e.g. carbon fibre 2/2 twill 200gsm, the 200gsm refers to the actual weight of the fabric in grams per square meter, so 1 square meter of this cloth will need 133g of resin to achieve the 60/40 ratio. You also need to account for the amount of resin used by the mesh which is 700grams per square meter of laminate, regardless of thickness. Another 100grams of resin will be required by the feed lines and in the bottom of the feed jug.

 

Here’s an equation that can be used for this;

 

Quick reference chart for resin consumption in infusion;

		Number of plys of 200g cloth
		1	2	3	4	5	6	7	8
Area Of Part In Square Metres	0.1	183	197	210	223	237	250	263	277
	0.2	267	293	320	347	373	400	427	453
	0.3	350	390	430	470	510	550	590	630
	0.5	517	583	650	717	783	850	917	983
	0.75	725	825	925	1025	1125	1225	1325	1425
	1	933	1067	1200	1333	1467	1600	1733	1867
	1.25	1142	1308	1475	1642	1808	1975	2142	2308
	1.5	1350	1550	1750	1950	2150	2350	2550	2750
	2	1767	2033	2300	2567	2833	3100	3367	3633
	2.5	2183	2517	2850	3183	3517	3850	4183	4517
	3	2600	3000	3400	3800	4200	4600	5000	5400

Paul Statham
Easy Composites / Carbon Mods - Technical

Hi,
this is very helpful. But I have a question:
Since I'm using a Soric Infusion Core in my setup I won't be using an Infusion mesh,
does that mean I can take the 700g/m2 out of the equation. Also I'm using peel ply,
so do I just add the weight of the peel ply (88g/m2) to the fibre weight or is this handled differently?

Thanks!

Hi,
What is the necesity of mixing the epoxy? I was told I can use epoxy with carbon firbra as laminar without mixing it with Catalysts

Shouldn't we also add the peel ply resin consumption?