Application of plastic welding process in packaging industry

　According to experiments, most of the traditional methods of sealing thermoplastic packaging can be replaced by ultrasonic welding.
　Ultrasound brings advantages to the packaging industry:
　- Greatly shorten processing time, the combination of plastics can be completed in a few milliseconds
　- Ultrasonic machining, clean, stable and reliable process with low energy consumption
　- Ultrasonic energy is only consumed in precise areas where soldering is required, efficient and economical
　- No preheating and heat preservation during operation; no extra heat is generated by using ultrasonic waves
　- Eliminates the need for expensive and easily contaminated aids such as adhesives, clasps or adhesives; the processed packaging is environmentally friendly and recyclable
　- Can be sealed by dirt (such as liquid, grease, powder, etc.) without affecting the welding effect
　- Ultrasound equipment and its components are easy to use in automated production environments and are compatible with material handling systems
　- Microprocessor-based or custom-designed control unit for precise setup of the device and quick adjustment via parameter storage and memory; advanced control and alarm system ensures optimal operation and output
　Matching comparison between ultrasonic and conventional packaging materials ——

Materials	Coating	Overlay with sheets	Laminating	Foaming material
ionomer Ionomer ( SurlynR )	G	G	G	--
PET / PETE	--	--	--	E
PETG / RPET	--	--	--	E
polyethylene (polyethylene)	E	E	E	--
polypropylene (polypropylene)	E	E	E	E
polyvinyl alcohol (PVA)	G	G	G	--
polyvinyl chloride (PVC)	G	G	G-P	E-G
styrene (Styrene)	G	G	G	E
Polyurethane (URethane)	E-G	--	E-G	--

Note: E = excellent, G = good, F = normal, P = bad, -- = indicates that the process and materials do not match
Conventional plastic packaging products using welding processes ——