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2. Plastic welding - Wikipedia

   en.wikipedia.org/wiki/Plastic_welding

   Hot gas welding, also known as hot air welding, is a plastic welding technique using heat. A specially designed heat gun, called a hot air welder, produces a jet of hot air that softens both the parts to be joined and a plastic filler rod, all of which must be of the same or a very similar plastic. (Welding PVC to acrylic is an exception to ...

3. Plastic weld non-destructive examination - Wikipedia

   en.wikipedia.org/wiki/Plastic_weld_non...

   One area that has driven research on NDE of plastic welds is the use of High-density polyethylene (HDPE) in nuclear power plants. Metal piping has traditionally been used for cooling water piping; however, HDPE offers significant advantages due to its significantly longer service life and its strength to weight ratio. [ 6 ]

4. Dry bag - Wikipedia

   en.wikipedia.org/wiki/Dry_bag

   They are often a construction of plastic film, plastic-coated fabric, or waterproof fabric ( Nylon, Vinyl, TPU, PVC and Tarpaulin [2])which is formed to create an impermeable, waterproof bag. Construction techniques include welding,(RF or Radio Frequency Welding [ 2 ] ) sewing (a seam-tape is used to seal over any needle holes) and gluing.

5. Hot plate welding - Wikipedia

   en.wikipedia.org/wiki/Hot_plate_welding

   Hot plate welding was first used in the early 1930s for joining PVC. [1] It gained in popularity with the prevalence of polyolefins, which are difficult to adhesively bond. By the 1960s, it was among the most widely used plastic welding methods. [2] Hot plate welding was used for pipelines and appliances as well as injection moldings.

6. Spin welding of polymers - Wikipedia

   en.wikipedia.org/wiki/Spin_welding_of_polymers

   Spin welding creates a clean and sound weld joint that requires little post processing. [3] Due to this most parts being welded are in the final stages of production, or are in final assembly. The first known application of spin welding was in the assembly of compasses, however spin welding has become used in a wide variety of products.

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