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Plastic joining is the method of joining semi-finished products of plastic materials together or to other materials as a fabrication process or damage repair. Joining methods can be classified into three categories: Mechanical fastening, Adhesive bonding, Welding.
Plastic is the generic name for a family of synthetic materials derived from petrochemicals.It is often product of two or more components. There are many families of plastics and polymers being used in construction industry, such as acrylics, composites, expanded polystyrene, polycarbonates, polyethylene, polypropylene, and polyvinyl chloride.
Well-suited for medical industry; No need to employ equipment for removing welding fumes as those are not produced in this process; Following are the disadvantages of ultrasonic welding: Depending on part's design, fixtures can be expensive; While the process is commonly used for welding of small parts, it is not easily adopted for larger ...
Implant induction welding is a joining method used in plastic manufacturing. The welding process uses an induction coil to excite and heat electromagnetically susceptible material at the joint interface and melt the thermoplastic. The susceptible material can be contained in a gasket placed between the welding surface, or within the actual ...
When bonding plastics, in particular with solvent-based adhesives, diffusion processes can also play a role. In this case, the plastic at the substrate surface is dissolved by the solvent contained in the adhesive. This leads to an increased mobility of the plastic's polymer chains, which in turn allows penetration by those of the adhesive.
Advantages of this process are fast cycle times (on the order of a few seconds), automation, repeatability, and good weld appearance. Only plastics which have dipoles can be heated using radio waves and therefore not all plastics are able to be welded using this process. Also, this process is not well suited for thick or overly complex joints.
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An advantage to solvent bonding versus other polymer joining methods is that bonding generally occurs below the glass transition temperature of the polymer. [2] [3] Solvent bonding differs from adhesive bonding, because the solvent does not become a permanent addition to the joined substrate. [4]