6oz+4oz stronger than double 6oz ?

General Discussion
1

Someone told me one time that 6&4oz lam is stronger than a double 6oz lam because the larger and smaller weaves bond better. Is this true? What do you guys think? Thanks

2

no…just…no.

although, a double 4 has better strength:weight than a single 8. and a triple 4 better than a double 6.

3

Nope.

4

No, but a combination of Warp and E in 6 and 4 is a good combo in those weights.

5

first off how many of the guys that answered to the post laminate? or build surfboards for a living?

second double six is going to hold more resin than a six four. there is no strength in resin.

what matters is that the lamination is done tight without resin between the two layers. thats where your strength comes from.

6

I have found that laminating each layer separately allows it to be tighter with less resin. Each layer is allowed cure first. Any opinions on this?

7
Quote:

first off how many of the guys that answered to the post laminate? or build surfboards for a living? second double six is going to hold more resin than a six four. there is no strength in resin.

you’re kidding, right? or are you just stirring the pot?

8
Quote:
Quote:

first off how many of the guys that answered to the post laminate? or build surfboards for a living? second double six is going to hold more resin than a six four. there is no strength in resin.

you’re kidding, right? or are you just stirring the pot?

do i look like im kidding?

you left out the important part in your quote of my words by the way.

9

Darth - just registered, no real name, no location - Si are you trolling - I’ll take the bait.

You have apoint on the whole resin to glass ratio, but a good 6,6 lam will be stronger than a good 6,4 lam.

You said yourself (correctly) that the strength comes from the fibre glass not the resin, so your compairing the strength of 12oz of glass compaired to 10oz of glass. You may aswell ask is 4oz stronger than 6oz, you get the same answer.

Though a good 6,4 lam may have a better wieght to strengh ratio, than double 6 due to the reasons you state, it won’t be stronger.

You can’t make a board that is cheap, good, strong and light. you get to pick 3 tops.

There are other ways to get a stronger glass job other than just the wieght of the cloth, like the using different types of stronger cloth, vac baging to get a realy good resin to cloth ratio and post curing will all add strenght.

10

hey boots test models are easy.

make a couple

scrap foam and scrap glass

let em cure and compare…

lam em tight

lam one sloppy

they dont have to be big

lam some on waxed paper

bend em flex em and fool arround with em

familiarity breeds familiarity

contempt is not required

understanding comes with concious evaluation.

test samples are instructional.

…ambrose…

there are people to tell you anything

even wrong stuff

(disimformation)

just to keep you in the dark

so’s they can maintain their post position.

if you make your own test models

you develop first hand knowledge.

collecting opinions is cool

but making your own tests

are what seperate the cognisenti

from the gossipers and malingerers

each has their place in the human ecology.

unfortunately the cognisenti are often men of few words.

praise b.t.

11

Well----- I’m willing to bet that you are one of those who does neither.

12

A laminate’s “strength” will have a lot of factors. Also you have to pick a measure of “strength”.

more important than cloth weight is the skill of the one doing the work. We design boats for amateur construction, and I can tell you we use a healthy safety factor to allow for the large variance in quality of lamination. A lamination made under lab conditions (vacuum bag or infused) could have double the technical properties of a sloppy lamination.

Then there is the type of cloth (weight is only one aspect), weave style, fiber orientation, glass type.

Then there is resin type, also make a huge difference.

So its possible to get a stronger board from 2 layer of 4oz. vs 6+4, depending on the type of glass/resin/quality of work

13

I read an interesting thing related to this in a composites book recently. Apparently a lighter weight cloth or tighter weave(?) can have a better peel strength than a heavier/coarser cloth.

The last board I had that went basically had a peel failure. Looked like it creased and then the entire deck just peeled off leaving just the laps from the bottom still on top. Better peel strength might have resulted in a crease rather than a full break.

I dunno how much difference 6oz to 4oz would make though. I strongly suspect the most important ingredient is quality of materials and workmanship.