• Re: Epoxy / adhesive for hard plastic (headphone hinge) ?

    From James Yuan@21:1/5 to All on Mon Oct 31 00:50:51 2022
    在 2020年4月15日星期三 UTC+8 12:07:42,<Mike S> 写道:
    I have Skullcandy Crusher headphones and the hinge plastic broke. It's a really common problem with them. I don't need a hinge, I'd like to epoxy
    the hinge joint in the fully open position as it would be when being
    worn. I tried using 2 part epoxy to hold it together, but it wasn't
    plastic rated epoxy and it held perfectly for about 4 minutes, it was
    easy to pry off of the plastic and it was clear it didn't adhere well at all. I remember making plastic model cars and planes as a kid, the glue seemed like it melted the plastic pieces into one another for a really
    good joint, like a weld in metal. I don't know what grade the plastic
    they used for the joints is and I don't know how to find that
    information. Is there an all purpose adhesive or epoxy that I can use to make one big solid mass of plastic? Or do I pretty much have to try the various adhesives used for different grades of plastic?

    This amazon ad says

    Loctite Super Glue Plastics Bonding System with Activator 2-Gram (681925)

    Bonds plastics such as Plexiglas, polycarbonate, polystyrene, PVC, polyethylene, polypropylene and polytetrafluoroethylene (PTFE)/Teflon.
    Plus rubber, leather, cork, paper, cardboard, wood, chipboard, fabric,
    metal and ceramic.

    https://www.amazon.com/Loctite-Plastics-Bonding-Activator-681925/dp/B000Y3LHXW


    Loctite sells 2 different adhesives for these two different types of plastic

    The easiest way to identify a plastic type is by its label, commonly a recycling symbol. Plastics marked with a 6 or “PS” are polystyrenes. These are used for simple items like disposable cutlery, plastic bowls,
    or fashion bags. For these, the best glue is a poly cement such as
    Loctite Plastic Bonder.

    Other types of plastic are used for tougher industrial or construction
    uses, such as drainpipes. Special plastics are even used for medical applications and bulletproof vests. For gluing these plastics, try
    Loctite Plastics Bonding System, which creates a powerful bond with just
    one drop.

    https://www.loctiteproducts.com/en/know-how/fix-stuff/plastic-glue.html


    JB Weld PlasticWeld comes with this note:

    While this product works beautifully with most varieties of plastic,
    please be aware that there are certain types - including polyethylene
    and polypropylene sheet - that it will not adhere to.

    https://www.acplasticsinc.com/informationcenter/r/the-best-adhesives-for-plastics

    Deepmaterial is reactive hot melt pressure sensitive adhesive manufacturer and supplier, manufacturing one component epoxy underfill adhesives, hot melt adhesives glue, uv curing adhesives,high refractive index optical adhesive, magnet bonding adhesives,
    best top waterproof structural adhesive glue for plastic to metal and glass, electronic adhesives glue for electric motor and micro motors in home appliance.
    For more visit:
    https://www.epoxyadhesiveglue.com/
    https://www.deepmaterialcn.com/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)