Ultrasonic Bonding of Fabrics and Films
Principle of Ultrasonic Bonding
Ultrasonic Bonding of Fabrics and Films. Ultrasonic welding technology is a commonly used technology in the field of plastic welding because of its economy, reliability, and ease of automatic integration. Unlike the traditional heat source that directly contacts the plastic to generate heat, ultrasonic welding generates heat through friction.
Ultrasonic bonding is to assemble two or more layers of materials through the bonding between the welding head and the rotating drum. The rotating drum is usually made of mold steel and has raised patterns on the surface of the drum. Under the action of the ultrasonic vibration of the welding head and the pressure between the welding head and the roller, frictional heat is generated at the position of the raised pattern of the roller, thereby completing the adhesion of the multilayer material. Because the frictional heat only occurs in the convex position of the roller, the heat is small, the bonding area is small, and the material is not hardened, so this allows the bonded material to maintain a high degree of flexibility, air permeability and absorption. These adhesive properties are essential for products that require the medical industry and dust-free environments, such as surgical gowns, clean clothes, and diapers.
Application range of ultrasonic sewing machine
Ultrasonic sewing of fabrics and films is a fast, clean and economical fabric and film processing technology. Typical thermoplastic fabric and film materials are acrylic, nylon, polyester, polyethylene, polypropylene, polyvinylchloride and urethane. Used in various industries such as textiles, clothing, non-woven fabrics, packaging, medical treatment and automobiles.
Braid
Factors affecting weldability: density and tightness of the braid, uniformity of material thickness. The welding strength may be different in the two perpendicular directions.
Non-woven fabric
Factors affecting weldability: the uniformity of material thickness and thermoplastic material content. The random orientation of the fibers brings excellent strength to the non-woven fabric.
Knitted fabric
Factors affecting weldability: thermoplastic material content, knitting style and material elasticity. The elasticity of knitted fabrics may cause deformation during continuous processing.
Coating material
Factors affecting weldability: coating material and its thickness
Multilayer material
Factors affecting weldability: the melting temperature of the bonding layer should be lower than that of other layers.
Film
Factors affecting weldability: film thickness, density and properties of thermoplastic materials.
Ultrasonic Sewing Video