What is Infrared Welding of Thermoplastic?

This process uses Infrared radiation which is absorbed by the thermoplastic material and transformed into heat. As a result, the faying surface of the plastic part is melted, and the components are joined by pressing them together. This is a fast, non-contact, particulate free welding method.

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Material Consideration

PolyPropylene (PP)
PolyStyrene (PS)
PolySulfone (PSO-Udel)
Thermo-Plastic Elastomers (TPE-Santoprene)
Acrylonitrile Butadiene Styrene (ABS-Cycolac)
PolyOxy-Methylene (POM-Acetal & Delrin)
PolyAmide (PA-Nylon & Zytel)
PolyButylene Terephthalate (PBT-Valox & Enduran)
PolyEthylene (PE)
PolyEthylene Terephthalate (PET-Polyester)
PolyMethyl MethAcrylate (PMMA-Acrylic & Lucite)
PolyPhenylene Oxide (PPO-Noryl)
PolyPhenylene Sulfide (PPS-Ryton)

Joint Design Considerations

During the welding process material displacement is typically 0.030″ in total. This results only from 0.015″ material displacement per side from material fusion during the weld/seal step as there is no displacement during the infrared melt step. However this varies depending on part material and geometry.

Advantages of Infrared Welding

Ability to weld complex 2D & 3D part geometries.
Welding materials acceptable: thermoplastics, polyethylene, PVC, polypropylene, composite reinforced plastics, polyamides PC, PCABS.
Low electrical consumption
Fast temperature ramp-up
Electrically insulated and low leakage current
Low maintenance required
Non-contact welding process
Plastification of complex, three-dimensional contours
Stronger welds, hermetic seal.
Ability to join different materials, e. g. TPE with PP GF 30

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What is Infrared Welding of Thermoplastic?

Material Consideration

Joint Design Considerations

Advantages of Infrared Welding