Abstract
Joining of plastics is a critical manufacturing step where plastic components are attached to each other or to components made of other materials. Methods for joining plastics can be divided into three categories: mechanical joining, adhesive bonding, and welding. Mechanical joining may involves the use of fasteners, such as screws or it may utilize integrated elements, such as snap-fit or press-fit joints. In adhesive bonding, an adhesive is placed between the parts (adherends) where it serves as the material that bonds the parts and transmits the load through the joint. In welding or fusion bonding, heat is used to melt or soften the polymer at the interface to enable polymer intermolecular diffusion and chain entanglements across the interface to give the joint strength upon cooling and resolidification of the melt. Methods for mechanical joining, adhesive bonding and welding of plastics are described.
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