What type of fiberglass?

General Discussion
1

Hi there swaylocker,

Thanks for a great forum, I’ve learned a lot from you guys… 

Just about to start on my second board and I need to order some fiberglass but im not sure what to choose. Last time I went with 10oz which was a little bit thick and kind of hard to make a decent glass job with (there was no other option at my local store).

Can you please advice me on which one of these that would be (if any) best for a surfboard?

http://cgi.ebay.de/20m-Rolle-Glasrovinggewebe-Glasgewebe-150g-m-Leinw-/150344590806?pt=Bootsteile_Zubeh%C3%B6r&hash=item23013c65d6#ht_3945wt_767

or

http://cgi.ebay.de/20m-Glasfilamentgewebe-Glasgewebe-165g-m-Koper-/150304962065?pt=Bootsteile_Zubeh%C3%B6r&hash=item22fedfb611#ht_3836wt_767

 

Looks like the weave is a bit different on them, and the data of warp/weft is also different but I don’t know anything about this… 

Thanks,

/Freddie

 

 

2

I can’t read German but the second one looks more in the ballpark… it appears to be 6 oz silane E glass.  The weave is a twill, though.   Ask the seller if he has something like this but with a plain weave.  

 

 

3

Thanks,

What would be the disadvantage to use twill?

4

As you are looking at the german ebay, where are you located? I perhaps can send you some other websites I get my stuff from.

5

I’m located in Sweden. I’ve only seen very expensive fiberglass on swedish sites (more than twice the price as on the links above). Therefore i’ve been looking around on sites in europe and this one seems pretty cheap, but plase send me some other websites if you have any suggestions… 

Thanks,

F

6

I don’t know this from personal experience, but I’ve heard it said that twill (as well as satin weaves) are not suitable for surfboards because they tend to pull, bunch, or otherwise distort when laminating. Otherwise, however, they can build a stronger board because of the diagonal orientation of the fibers, which helps spread the load and resist snapping… much like biax. The advantage is that it conforms easier to contours, because it’s a “looser” weave… rather than an over/under/over/under pattern, it’s over/under,under,under/over, or some some other non-alternating pattern.

7

In twill fiber is 0°/90° like plein wave, the diagonal effect come from weaving: each warp (or weft) fiber run over two (for twill 2/2) weft (or warp) fiber so it shift weave crossing each line and give this diagonal effet.

Compare to industrial plein wave, twill weaving have less crimp it’s a tight weaving fabric still flexible for compound curves. With resin it’s give a stiffer laminate. Surfboard plein wave is flexible too because its’ a loose weaving, that’s way it’s fast and easy to laminate by spreading resin on fiber (that’s what i call the standard surfboard method).

Because of it’s flexibility twill is difficult to not deform wave pattern, and because of tightness it’s difficult to laminate with standard surfboard method.

For surfboards twill (like satin and multiaxial stitch fabric) can be use with epoxy resin and industrial way to laminate (unroll fiber precut on resin).

Sorry for my frenglish

8

So the way to laminate twill weave would be to first spread out the resin on the blank and then put the cloth on it to saturate it from “inside out”? 

How does this work on multiple layers of glass? 

9

I’ve used this: http://www.hp-textiles.com/shop/product_info.php?info=p47_166g-m--glasfilamentgewebe-silane-leinwand---hp-p163e.html with their epoxy resin.Worked good and they also ship to sweden.

10

I buy from Thayercraft.  Thayercraft.com.  Good prices for a hobby guy and a nice lady with a southern accent to help you.  They ship in the US for free.  I have no idea about overseas shipping with taxes, shipping and other bull sheeeet.  Good luck.  Mike

11

Thanks, lemat… you know your cloth.