Darryl Keil Last Activity 2025-09-09 11:09 AM
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wally

Posts: 4

Joined: 2013-06-13

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Subject : Unibond 800 cure time in hot box at 100F ?
Posted : 2013-06-13 9:11 PM
Post #36923
Hi

I'm a new Unibond 800 user and use Unibond 800 to glue up bamboo fishing rods.
I'm wondering how long it will take for a Unibond 800 glued up rod to cure while in a hot box at 100 degrees Fahreheit. I mix the Unibond at about 7% catylist by weight.

thanks


 
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wally

Posts: 4

Joined: 2013-06-13

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Subject : RE: Unibond 800 cure time in hot box at 100F ?
Posted : 2013-06-21 11:34 AM
Post #36927 - In reply to #36923
good thing Unibond cures faster than people reply to this forum


Here is the process I followed (this could be over kill, but it worked).
1) Glue up
2) Let sit for 4 hrs at 70F, at this point glue is well on its way to being set. Rod can be carefully handled
3) Move rod to hot box at 100F, let sit for 20 hrs
4) Heat set at 200F for 45mins




 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: Unibond 800 cure time in hot box at 100F ?
Posted : 2013-06-21 1:04 PM
Post #36928 - In reply to #36927
I am awash with shame and guilt. I'm glad Unibond 800 performs better than I do, especially since this forum is untimitely my responsibilty.

Fly rods are not our targeted market so I really dont have much experience with your particular application. No one in the furniture field would leave something under heat for that long or go all the way up to 200 degrees, so your processes, I assume, are common to your situation.

Thank you very much for posting your results. We are getting more and more flyrod makers using Unibond 800 so I hope others will benifit from your information.

Darryl Keil


 
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wally

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Joined: 2013-06-13

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Subject : RE: Unibond 800 cure time in hot box at 100F ?
Posted : 2013-06-21 2:25 PM
Post #36929 - In reply to #36928
After being in the hotbox at 100F for 20 hrs; I suspect the 200F for 45mins was not needed; but I'm not 100% sure and I didn't want to take a chance of having uncured glue. Time will tell as more bamboo makers become familiar with Unibond 800. Many different processes will be employed I'm sure.

With my previous UF glue, which was discontinued; I let the rod sit for 4-6 hrs at 70F then I would heat set at 200F for 1 hr - done all in the same day.

In my opinion 200F is about as high as one can go without "changing" the bamboo.

I like the Unibond 800 though; and the fact that its a more "green" UF glue product.


 
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Enrico Konig

Posts: 74

Joined: 2006-01-06
Location: Vancouver, BC

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Subject : RE: Unibond 800 cure time in hot box at 100F ?
Posted : 2013-06-22 1:04 AM
Post #36930 - In reply to #36927
Seems way way overkill to me. After 6-7 hrs at 70 degrees, it should be pretty much done. At least with the UF glue I've been using. An additional 1 hr at 100 degrees would definitely finish it if it isn't already. Using a heating pad, which is around 75-80 degrees, I can easily do 3 pressings in a 12 hr day, and that's curved multi-layered laminations. Do the recommended thing: put a little of the excess glue in a baggie in the same heat conditions as what is being glued -- once the glue is hard, the glue is cured. For curved laminations, I will let the piece set for a couple days as curves will toe in as the glue fully cures and shrinks a bit, but any clamping at this point is completely unnecessary for my things.

I'm curious: I'm a dedicated flyfisher but have never made any bamboo rods; are their advantages to using UF glues with bamboo rods? The fellow I know that makes a living making bamboo steelhead rods never touches the stuff.


 
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wally

Posts: 4

Joined: 2013-06-13

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Subject : RE: Unibond 800 cure time in hot box at 100F ?
Posted : 2013-09-19 2:15 PM
Post #36996 - In reply to #36930
... benefits to UF glue, yes
UF glue makes for a stiffer rod, which is generally thought of as goodness/
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