What is the production process of Ultrasonic Composite Non-woven Fabric?

1. What is ultrasonic composite non-woven fabric?
Ultrasonic Composite Non-woven Fabric is a composite material that uses ultrasonic vibration energy to form an overall structure by combining multiple layers of non-woven fabric or non-woven fabric with other materials through friction and melting between thermoplastic material fibers. Compared with traditional gluing, stitching or hot pressing processes, the ultrasonic composite process does not require the use of glue or sutures, which is environmentally friendly and efficient.

2. Production process of ultrasonic composite non-woven fabric
Raw material preparation
To produce ultrasonic composite non-woven fabric, you first need to prepare a non-woven fabric substrate, commonly used thermoplastic fiber materials such as polypropylene (PP), polyester (PET), and polyamide (PA). According to product requirements, non-woven fabrics of different thicknesses, pore sizes, and fiber structures can be selected.

Layer stacking
The non-woven fabrics to be composited are stacked, and the number of layers and material types are determined according to the product design. For example, the non-woven fabric layer in a medical mask may include an outer waterproof layer, a middle filter layer, and an inner moisture-absorbing layer.

Ultrasonic composite equipment preparation
The core parts of an ultrasonic composite machine are ultrasonic transducers and molds. The ultrasonic transducer converts electrical energy into high-frequency mechanical vibration (usually around 20kHz), which is transmitted to the non-woven material through the mold.

Ultrasonic compounding
When the stacked non-woven fabric layers pass through the ultrasonic compounding machine, the high-frequency vibration causes friction between the thermoplastic fibers, resulting in local high temperatures, causing the fibers to partially melt and quickly cool and bond. This process is usually completed within a few seconds and is extremely efficient.

Cooling and shaping
The non-woven fabric after ultrasonic compounding is immediately cooled to form a strong bonding interface. Some equipment is equipped with a cooling device to ensure the stability of the composite layer structure and avoid deformation.

Post-processing and inspection
The composite non-woven fabric will undergo subsequent processing such as cutting, winding, and slitting. At the same time, the quality inspection link ensures that the composite strength, air permeability and thickness meet the standards.

3. Key technical features of ultrasonic compound non-woven fabrics
No glue pollution
No adhesive is required during the ultrasonic compounding process, which avoids chemical pollution and environmental impact, and is more suitable for medical and health and environmental protection fields with high requirements.

High efficiency and energy saving
The composite time is short, the energy consumption is low, the production cost is saved, and the process is highly automated, which is suitable for large-scale continuous production.

Strong connection and good air permeability
The joint points of ultrasonic composite are evenly distributed, the structure is stable and the connection strength is high, while maintaining the good air permeability and softness of the non-woven fabric itself.

Diversified composite solutions
It can realize the combination of non-woven fabrics of different materials and thicknesses, and can also be composited with membrane materials, textiles, etc. to meet different functional requirements.

4. Application examples of ultrasonic composite process
Medical protective products
Such as disposable masks and protective clothing, each layer of non-woven fabric is sealed and reinforced by ultrasonic composite to improve the protective performance.

Filter materials
Air purifier filters, automotive interior filter layers, etc. are enhanced by ultrasonic composite to enhance structural stability and filtration effect.

Clothing fabrics
Compound waterproof membranes and non-woven fabrics to manufacture light, waterproof and breathable functional fabrics.

Ultrasonic Composite Non-woven Fabric production process has become an important technical route in the field of non-woven composites with its environmental protection, high efficiency and stability. It not only improves the performance and quality of the product, but also meets the demand of modern industry for green manufacturing. In the future, with the continuous advancement of equipment technology and the development of new materials, ultrasonic composite non-woven fabrics will show greater potential in more fields.