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GCAdidas13
05-19-2005, 10:19 AM
How strong is a bond between fiberglass and MDF?

It seems as if it would be relatively easy to break the fiberglass off of the MDF, because you would only need to remove the top few layers of MDF to get the fiberglass off.

Right?

TPABlazer
05-19-2005, 10:25 AM
Strong. You act like mdf is balsa wood.

GCAdidas13
05-19-2005, 10:33 AM
Well in my experience MDF is kinda brittle when it comes to a small area...

GCAdidas13
05-19-2005, 12:10 PM
answer the question

CntInjaDisNinja
05-19-2005, 01:37 PM
MDF and resin bond great. the bond is unbreakable becuase the resin soaks into the wood. Resin pretty much sticks to everyting except vynal and rubber.

TPABlazer
05-19-2005, 02:13 PM
answer the question


Oh I must have typed in invisible when I said "strong"

Whenever I glass right to MDF it always stays and never moves.

Fglass doesnt like to stick to: Glass, plastic, vynl, some rubbers, some metals... tile I think...

8inw7
05-20-2005, 01:24 AM
My mdf ring split completely in half before the ring detached from the fiberglass....The bond is stronger than mdf itself.

GCAdidas13
05-20-2005, 01:26 AM
well okay let me draw something up in paint.

GCAdidas13
05-20-2005, 01:30 AM
you're saying that this could never happen? it seems feasible to me.

http://img262.echo.cx/img262/5968/untitled6vx.jpg

ramos
05-20-2005, 01:34 AM
IF your picture is showing the wood breaking first it's possible. But resin by itself is very brittle. Resin would break before the mdf. However if mat and or cloth was involved the mdf would probably go first. :)

Acidburn
05-20-2005, 01:37 AM
RAMOS IS BACK!!!!! :woot:

GCAdidas13
05-20-2005, 01:39 AM
IF your picture is showing the wood breaking first it's possible. But resin by itself is very brittle. Resin would break before the mdf. However if mat and or cloth was involved the mdf would probably go first. :)
Exactly my point. I'm askeered that i'll have problems with this paper-like wood we call MDF.

TPABlazer
05-20-2005, 02:33 AM
Exactly my point. I'm askeered that i'll have problems with this paper-like wood we call MDF.


all depends on what that part is being used for. if its the pressure inside the box that youre worried about, the glass will go before the mdf, and if the glass is that brittle, then you have bigger fish to fry than the seperation of MDF.

if its just a cosmetic foot or an amp rack brace or something, you wont need to be able to jump on it.

hoss
05-20-2005, 02:36 AM
resin is used in SPL boxes made out of MDF.

nuff said, you shouldnt run into any issues.

req
05-20-2005, 09:22 AM
brian, if you are that scurred - drill a few small holes in the MDF - and glass a good 10" in on each piece of MDF.

the resin will seep into the little holes, and you will have a nice 20in^2 or more of surface contact.

make sure you glass EACH SIDE of the thing.


wont be going anywhere... ever. :p:

GCAdidas13
05-20-2005, 02:18 PM
make sure you glass EACH SIDE of the thing.
what? like... each side of the wood?

idk if i can, in my setup

basically what it amounts to, is that i want to try to do this without having to bother with screwing any wood together except for the baffle.

the bottom will be mostly fiberglass, and the sides will be held together with fiberglass.

what do you think?

req
05-20-2005, 02:45 PM
sounds good to me, just make sure you get some bracing in there.

ramos
05-26-2005, 08:39 PM
resin is used in SPL boxes made out of MDF.

nuff said, you shouldnt run into any issues.


Tiss true my son, But the resin is used for sealing, or making as air tight as possible in spl enclosures. It does little if anything to add strength. :)

hoss
05-26-2005, 09:20 PM
i know, but it did answer the question of

How strong is a bond between fiberglass and MDF?

It seems as if it would be relatively easy to break the fiberglass off of the MDF, because you would only need to remove the top few layers of MDF to get the fiberglass off.

Right?
which is the question i was refering to. no question of adding strength or any of that :) , just a testament of the stresses that the bond can endure.