Jump to content

Bonding Nylon and PP with adhesives

Recommended Posts

Posted · Bonding Nylon and PP with adhesives

Recently I tried glueing PP-straps back together after cutting them. It were injection moulded parts, not printed.


You can bond them with cyanoacrylate, after roughening up the surface by sanding, and after using an "activator". These activators come in little tubes similar to a fluo pen marker with felt tip, except that the liquid is not ink but a chemical that partially dissolves the plastic (at least I think so, but I am not sure how it works chemically). Then apply the cyanoacrylate and *immediately* press parts together. The activator makes the bonding stronger and also speeds up curing, so you only have a few seconds before it is too hard.


I found these in a normal super market (such as Delhaize, Carrefour) and hardware shops (such as Brico, Hubo, and similar here in Belgium).

Bonding strength is comparable with older glues like contact glues and "universal glues". But it is *far less* than what we got used to today with cyanoacrylates and composite glues on good substrates. So under high loads and especially when peeling, it may fail. Depending on your application - if purely decorative, light loads or big surfaces - it can work.


Under high loads, I think you would be better off screwing, clamping (e.g. snap-fits or dovetails), or welding parts together.


An activator also improves bonding strength of PLA with cyanoacrylate, but the working time is reduced so much that it gets quite uncomfortable. You don't have time to align parts correctly anymore, they stick immediately. And if you are too slow, the glue is hard before even touching.


  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    • Create New...