Which materials are suitable for ultrasonic plastic welding?-altrasonic.com

Which materials are suitable for ultrasonic plastic welding?

2021-08-12

The plastic welding machine transmits ultrasonic energy to the welding area through the upper weldment. Because the welding area, that is, the acoustic resistance at the interface of the two welds, is large, local high temperature will be generated. In addition, due to the poor thermal conductivity of the plastic, it cannot be distributed in time for a while, and it gathers in the welding area, causing the contact surface of the two plastics to melt rapidly, and after a certain pressure is applied, they are merged into one. When the ultrasonic stops, let the pressure continue, and some hold time, make it solidify and shape, so that a strong molecular chain is formed to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material.

Suitable welding materials are:

1. Acrylonitrile butadiene-styrene copolymer, referred to as ABS, this material is a kind of material that is very good for welding, but this material is more expensive.

2. Polystyrene, PS for short, is suitable for ultrasonic welding.

3. SAN: The ultrasonic welding effect is good.

Materials not suitable for welding:

1. nylon, referred to as PA

2. polyoxymethylene (POM).

3. Polymethyl methacrylate, abbreviated as: PMM.

4. Acrylonitrile-styrene copolymer, referred to as PMM.

5. Polyester (PETP polybutylene terephthalate, PBTP polyethylene terephthalate).

6. PPS: The material is too soft, which makes it very difficult to weld.

7. Polyethylene, referred to as PE, this material is relatively soft and not easy to weld. The higher the density, the easier it is to weld.

8. Polyvinyl chloride, referred to as PVC, so the material is relatively soft and difficult to weld, so few people use this material, and the products of this material are generally welded with high frequency.

9. Polycarbonate, or PC for short, has a high melting point and requires a long welding time.

10. Polypropylene, referred to as PP, because of its low elastic coefficient, this material is easy to attenuate sound wave vibration and is difficult to weld