Is some 1708 harder to wet out than others?

One of the retailers up here has a 2415 that has that much variation compared to the product line I use from down south. First time I used a local roll it was a bit of a surprise seeing something that varied sold as the same product. Can confirm it was easier to wet out and the 50kg roll was much easier to carry up the ladder than the other 50kg rolls....

Wont be back down to the shop for a week or so, but have some similar samples like the one pictured.

 

If you are using epoxy with fiberglass sized for polyester/vinylester, it will be hard to wet. Sizing is supposed to be dissolved by the styrene.

 

In my case it's equivalent part numbers from two separate suppliers. Don't think they have a special combi for epoxy on the shelf in an area where there is maybe only 3 epoxy boats out of 500 glass boats.

 

It's not that. All biaxial, triaxial, uni, wowen, twill etc are without binders and compatible with epoxy. Chopped strand matt is always with binder..

 

Well then I'll have to assume that same part number is for epoxy and the other for poly. As opposed to thinking one was sub par.

 

From Epoxyworks, it touches on using epoxy on cloth with binder
Chopped Strand Mat and Epoxy - Epoxyworks

 

Is it just me or is the sample on the right just a 45 uni with mat?

And the sample on the left actually 1708?

I think what you have been using is not 1708; the new stuff is. I don't know what the stuff on the right even is..

When I look close at the picture is looks like a 45 degree tow with mat because I don't see two directions on the one on right.

 

Weigh the old stuff and tell us the weight per unit area.

 

1708 has three layers. 2 stranded and 1 CSM. The CSM should have a binder.

What is the advantage of 1708 over 1808? The strength is very dependent on fiber orientation.

EDIT: I could be wrong on both counts here. The CSM is stitched and may not need any binder. Woven cloth laminates like G10 have low strength at 45° so I think biaxial should act similarly.

 

On closer and maybe better eyesight today, I see the other stuff has another tow at 45, but the other stuff is like no 1708 I've ever seen with the tows spaced apart and note the stitching is also a different stitch count per inch.

 

using poly

 

yes the sample on the right is a scrap piece i found laying around but it more or less represents the cloth as a whole.

 

There are two 45's running perpendicular. This is supplied from North American Composites and is 1708... had a long in depth conversation with the sales rep.

The branding on the roll is "scapps" or something similar to that (going off my memory).

I cut a 12x12 inch square of each and weighed them. They came out to the exact same weight down to the gram.

As to what or how I am not sure... but life is so much easier working with the sample on the right than the left. And for what I'm doing it works just fine!