To clarify, plastic welding generally implies melting the plastic not with heat but with specific solvents. It's kind of "gluing" where there technically there

To clarify, plastic welding generally implies melting the plastic not with heat but with specific solvents. It's kind of "gluing" where there technically there is no glue (i.e. some substance that stays between your two parts) but rather a weld, where the edges of the parts get melted and stuck together as the "glue" (solvent) evaporates.