Why HF / RF for welding PVC and PU Materials?

Repeatable, reliable technology

HF welding utilizes high-frequency electromagnetic energy to generate heat, ensuring consistent results with each weld. The precision and control offered by this technology lead to repeatable outcomes, reducing the likelihood of errors or defects in the welding process.

Strong, durable and even welds

HF welding creates strong bonds between materials, resulting in durable and long-lasting welds. The process effectively fuses materials together, creating a seamless joint that can withstand considerable stress and strain. Additionally, HF welding produces even welds without inconsistencies, enhancing the structural integrity of the final product.

Air, gas and waterproof welds

The nature of HF welding ensures that the welds formed are airtight, gas-tight, and waterproof. This characteristic is particularly valuable in applications where maintaining a barrier against air, gases, or liquids is essential, such as in the production of inflatable products, liquid tanks, or biogas covers.

Multi-layer welding

HF welding is capable of welding multiple layers of material simultaneously, providing versatility in manufacturing processes. This capability allows for the creation of complex products with layered components, enhancing design possibilities and efficiency in production.

An environmentally friendly choice

Compared to traditional welding methods that may involve the use of adhesives, solvents, or other chemicals, HF welding is often considered more environmentally friendly. It typically does not require the use of additional consumables or generate harmful byproducts, contributing to sustainable manufacturing practices.

Hot air

Hot air is the technology where hot air is blown between layers of material through a nozzle and where rollers press the preheated surfaces together.

+ Can be used for non-dielectric materials

– Difficult or impossible to remake the weld if the result is not satisfactory

Hot wedge

The hot wedge is a process where the material is dragged against a hot surface (wedge) and where rollers press the preheated surfaces together.

+ Can be used for non-dielectric materials

– Difficult or impossible to remake the weld if the result is not satisfactory

Impulse

Impulse is a technology where a steel band is covered with PTFE tape and where electrical current is running through the steel band.

The level of current generates heat which is transferred mechanically to the fabric.

+ Can be used for non-dielectric materials

– A negative effect with this technology is that the steel band will be significantly hotter towards the ends on the steel band, which can cause burns on sensitive fabrics

Ultrasonic

Ultrasonic is sound that accelerates down into a ”Sonotrode” (tool) resulting in a mechanical hammering effect. This pounding generates heat in most fabrics. The heat needs to penetrate the first layer in order to join the second layer.

+ Can be used for non-dielectric materials

– It is difficult to weld more than two material layers without damaging the surface of the material and causing burns