My car key comes apart into the electronic section and the key section. The little tab that keeps them together is loose or broke or whatever and my key comes apart easily. Had a mini crisis this morning when I got to my car and realized the key part was missing.
I want to bond it together permanently. After researching the markings on it, the housing seems to be made of nylon, which to my understanding is extremely difficult to glue.
Considered taping it but then I couldn’t see the buttons (I know that’s a stupid excuse, but I frequently forgot which is which), plus I’m afraid of permanently “pushing” them with the tape. And it would be much bulkier with the key out all the time.
I cannot see your pictures for some reason, but you could try cleaning the surfaces with isopropyl alcohol to remove dirt and grease and gluing them with cyanoacrylate or epoxy adhesive. I don’t guarantee it will hold forever, but it’s worth a try.
You have a problem with adhesion, that is to say, nylon adheres poorly. I’d lightly abrade the bonding surfaces with 100 grit (or so) sandpaper to provide a physical tooth for the adhesive to grab, as it were. Epoxy (say a quick setting brand like J-B Weld) then to bond the two surfaces together. Don’t fill the hole: just use enough adhesive to form a film between the two halves to be bonded. A tight fit leaving a thin film of adhesive is more important than lots of adhesive. I’d use epoxy because one of the drawbacks to CA (cyanoacrylate or superglue) is that it can be a little brittle in uses where there is stress on the bond area and liable to crack and fail.
Possibly. I do have an uncut, unprogrammed key I bought when I got the car, intending to get it cut and programmed as a backup (car only came with one key), but have repeated balked at the price to get it done at the dealer, and the locksmiths around me can’t do it (well, they could if they had the proper equipment, but none of them do).
Anyways, failing anything else I may give it a try, but what I really don’t want is to fuck it up and have no working keys.
I would get a non-electronic key cut and leave the original in the folded configuration - just use it as a separate lock/unlock keychain dongle. Fastening the case together without having to withstand the stress of fold/unfold/twist should be easier. Perhaps a black zip tie around the edge?
Why do you think it is nylon?
It looks a lot like polyethylene.
I would check the adhesive section at Home Depot. Each adhesive will have a list of bondage strengths for different materials.
I have glued polyethylene successfully but the glue can be a little pricier than epoxy and I would not be confident that it would be able to withstand the abuse your key might get but it is worth a try.
Because there is a marking on the inside reading “PA GF50” which, plugged into Google, leads to a full page of links to data sheets for a substance described as a “50% glass fibre reinforced polyamide blend,” i.e. nylon.
What about covering the whole assembly with electrical heat-shrink tubing?
Should be possible to connect the 2 pieces, but still have the key accessible for use. Maybe even just a strip of the tubing connecting them, but leaving the key slot open. then when it’s time to replace the battery, just remove the heat-shrink tubing, discard it, and install a new set.