Can you sonic weld hdpe

These benefits include:. However, not all thermoplastic materials can be welded. Here are some of the most commonly welded thermoplastics, and their applications:. It is used in a variety of products ranging from reusable plastic containers to car batteries. It also has medicinal uses, as a way to repair hernias and make heat-resistant medical equipment.

There are a variety of strains of Polyethylene categorized by their density and molecular structure, and all have different applications. It is also very popular in the construction industry, where it is used in vinyl siding, drain pipes, gutters, and roofing sheets. It can be converted to more flexible forms, which is seen in hoses, tubing, electrical insulation, water beds, and upholstery.

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Thermoplastics soften over a wide range of temperatures and have a glass transition temperature. Thermoset polymers are crystalline and have a distinct melting point. A crystalline polymer will stay solid until it reaches its melting point and then melt all at once. Amorphous thermoplastics also have a lower specific gravity, lower tensile strength and tensile modulus, higher ductility and impact strength and lower creep resistance compared to most crystalline polymers. These plastics are well suited to ultrasonic welding.

Ultrasonic welding of two parts made from the same plastic material will usually obtain the best result. However, in some cases two different thermoplastics can be welded using ultrasonics, for example when the materials are chemically compatible and have similar melting points. One of the best combinations of plastics for this kind of welding is ABS and acrylic. It is therefore difficult to join any of these using this kind of welding.

One of the most commonly requested combinations is polyethylene and polypropylene, but these are both crystalline and not chemically compatible. Sonic welding is used to make butane lighters, toys, pipettes and intravenous catheters. The upper portions of athletic shoes are frequently made using ultrasonic welding rather than stitching or gluing.

Ultrasonic Welding uses high frequency sound waves to vibrate the two pieces together until joined. The seam is usually produced in one to five seconds.

Because of the fast weld cycle Sonic Welding can be quite efficient and economical to produce on higher quantity production runs. The Ultra Sonic Welders are expensive and usually a custom Horn is required for each different part to be bonded so unless there are a large quantity of the same pieces it can be expensive. UltraSonic Welds can be almost invisible on some parts or very noticeable on other parts such as when welding a typical U. Postal Service plastic mail bin.