H_Rocket
Death by Powerpoint
Polyurethane (aka Gorilla Glue)What glue would I use to attach a spring steel engine hook to a cardboard motor tube?
Polyurethane (aka Gorilla Glue)What glue would I use to attach a spring steel engine hook to a cardboard motor tube?
So if I glue two pieces of tissue paper together with school glue, then tug on them, the glue failed?Form follows function. It's an application where glue doesn't work, an application where we are trying to "glue the ungluable"
Hmm, seems like I remember a thread like that on TRF?
It's a real example showing the fallacy of this statement:
By that logic, fingers are not gluable, because gluing one's fingers to things (e.g. with CA) is a bad idea. And cars capable of driving at 80 mph on a good quality highway are incapable of going 80 on a residential street.
Perhaps the thread title should be "Bonding the Unbondable". I think it was abundantly clear from the OP that the subject is bonding, not suitability thereof.
So if I glue two pieces of tissue paper together with school glue, then tug on them, the glue failed?
What glue would I use to attach a spring steel engine hook to a cardboard motor tube?
One of the more flexible CAs, but you'll still need to back it up with the over ring.
Because the glue won't hold... that's kind of the point... Saying we can glue anything... may be true... but if it doesn't work.. what's the point?
The thread subject in full (beyond the few words of the title) is glue that will bond to polypropylene. The right question is: why were you posting about gluing a spring steel engine hook to a cardboard MMT in a thread about gluing to polypropylene (or other perhaps materials that are believed to be ungluable).
After considering the results, tell us again that you can't glue spring steel to cardboard.
What glue would I use to attach a spring steel engine hook to a cardboard motor tube?
Or the first one. Or looking up what "can't" means.I guess I'm guilty of not reading all the posts when I just jumped in?
Or the first one. Or looking up what "can't" means.
I wonder what bonds well to ice. I mean, if it's kept cold and solid, with a smooth flat face, I'm sure there is something that would work. But what? It has to be something which can be applied and will cure (or dry) while cold. Hmmm. Construction adhesive for building igloos.
I guess I should have caveated that with nothing we use in rocketry is unglueable..
FYI, I got to try the above linked adhesive last weekend on a PP nosecone to a PP-filament printed avbay. Worked great! Although it's 2 part stuff it's weird and not like an epoxy. Seemed to expand slightly like urethane glue and also dried out and left crystals where I tried a fillet.I looked up that stuff and cheapest I could find was about $60 a tube!
I might try some of this instead for PP.
If I had a point, which I usually don't, it would be that this is a failure of the tube, not a failure of the glue. Hence mentioning a backing ring, and also my contrived example of school glue and tissue paper.I guess I'm guilty of not reading all the posts when I just jumped in?
Thread drift is a thing Joe. (See Post #8) Maybe you could ask a moderator to change the thread title, since it seems to be a touchy subject.
Not cardboard, a cardboard motor mount tube.
I didn't think I'd have to explain that I'd want is to be successfull, and not rip the motor mount tube. Ruining the motor tube would be a non-starter for me.
I thought that controversary was over, but since you've brought it back (why don't you give me a paper cut and pour lemon juice in while you're at it?) I'll say what I realized some time ago that I should have said in the first place:If I had a point, which I usually don't, it would be that this is a failure of the tube, not a failure of the glue. Hence mentioning a backing ring, and also my contrived example of school glue and tissue paper.
SEE THE THING ABOUT RICE FLOUR GLUE ISI thought that controversary was over, but since you've brought it back (why don't you give me a paper cut and pour lemon juice in while you're at it?) I'll say what I realized some time ago that I should have said in the first place:
Lake, I started the thread purely about material properties, and you brought up applications. We talked about the protein content of various flours and you brought up cake recipes. (Is that a bad metaphor? I suck at metaphors.)
I thought that controversary was over, but since you've brought it back (why don't you give me a paper cut and pour lemon juice in while you're at it?) I'll say what I realized some time ago that I should have said in the first place:
Lake, I started the thread purely about material properties, and you brought up applications. We talked about the protein content of various flours and you brought up cake recipes. (Is that a bad metaphor? I suck at metaphors.)
Nothing is unglueable. You just need the right glue.
What glue would I use to attach a spring steel engine hook to a cardboard motor tube?
A guy I used to work with was gluing with CA. He applied the glue and then hit it with a squirt of activator. The blob of glue skinned, built up pressure and then ruptured, squirting him just under the lower eyelid. Very lucky. Since then (late '80s) I always use safety glasses when using CA, and recommend the same to everyone else.Ultra thin Ca is my Arch enemy. 1 tiny drop will run and spread for 10 miles, gluing the entire county to my worktable in one big mass.
Almost glued my eyelids shut once. Had dribbled some ca into a tight fitting seam. As i was observing the flow of glue, the seam snapped closed, splashing the ca right into my eyes. The worst part was the ice cold saline solution in the ER room, as they peeled them apart and tried to flush it out. Gravel in my eyes,,for about a week. Learned a hard quick lesson.
A guy I used to work with was gluing with CA. He applied the glue and then hit it with a squirt of activator. The blob of glue skinned, built up pressure and then ruptured, squirting him just under the lower eyelid. Very lucky. Since then (late '80s) I always use safety glasses when using CA, and recommend the same to everyone else.
If I had a point, which I usually don't, it would be that this is a failure of the tube, not a failure of the glue. Hence mentioning a backing ring, and also my contrived example of school glue and tissue paper.
It just so happens, though, that circling back around to the top-topic.... I was chatting with a couple of church friends ( woodworker, boat guy ) and "Star Board" is a thing used on boats, and it's essentially just HDPE sheet. So all these folks have spent a LOT of money trying to figure out which adhesives work in this context, orders of magnitude more than we have in rocketry. And the argument threads are freely perusable online.
* G/flex 655
* 3M 5200
* Lord 7542 AB
* 3M DP-8005
* MarineTex FlexSet
* ChemSet 6105 / 6110
These last ones especially looks a little interesting.
RapidFuse is a toughen gel type, high grade CA. Good product as CA goes, but not really much different than other toughened CA. DAP also sells the same Rapid Fuse with a vial of primer (most likely just heptane) for plastic bonding.Anybody ever heard of DAP RapidFuse? I saw it mentioned in a youtube home improvement video. DAP says it "bonds virtually everything".
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