Views:22 Author:Site Editor Publish Time: 2019-08-27 Origin:Site
First, simply understand what is ultrasound
Ultrasonic wave is a kind of sound wave with a frequency higher than 20,000 Hz. It has good directionality, strong penetrating ability, easy to obtain concentrated sound energy, and has a long distance in water. It can be used for distance measurement, speed measurement, cleaning, welding, crushing stone. , sterilization and disinfection. There are many applications in medicine, military, industry, and agriculture. Ultrasound is named for its lower frequency limit than the upper limit of human hearing.
Scientists refer to the number of vibrations per second as the frequency of the sound, and its unit is Hertz (Hz). The frequency of sound waves that we can hear in human ears is 20Hz-20000Hz. Therefore, we call sound waves with frequencies above 20,000 Hz "ultrasonics".
First, ultrasonic cloth welding
Ultrasonic cloth welding is to transmit ultrasonic waves to the fabric processing piece through the welding head, so that the two or more layers of the cloth joint surface are subjected to intense friction by the action of ultrasonic waves, and the friction heat can melt the cloth joint surface to complete the bonding. The technology has the advantages of high speed, strong weld seam, etc. The instantaneous heat energy only acts on the welding point and does not damage the function of the cloth surface.
When ultrasonic waves act on the thermoplastic cloth contact surface, tens of thousands of high-frequency vibrations per second are generated. This high-frequency vibration reaches a certain amplitude, and the ultrasonic energy is transmitted to the weld zone through the upper weldment. The joints at the welded joints have a large acoustic resistance, so local high temperatures are generated. Moreover, due to the poor thermal conductivity of the plastic, it can not be dissipated in time and gather in the weld zone, so that the contact surfaces of the two fabrics melt rapidly, and after a certain pressure, they are integrated into one. When the ultrasonic wave stops, let the pressure last for a few seconds to solidify it, thus forming a strong molecular chain for welding purposes, and the seam strength can be close to the strength of the raw material. A variety of beautiful three-dimensional fabrics can be produced by replacing the embossing rolls.
Second, the advantages and disadvantages of ultrasonic composite
Sticking together a layer is called a composite. Composite materials are the combination of the advantages of a variety of materials to achieve the function of a single material. For example, we make cotton coats, the fabric has good pulling force and the surface is wear-resistant, but it is not enough to keep warm and cold. The cotton fluffy warm effect is good. We can't cut clothes separately, and the two materials can be combined together to make it beautiful and warm. The cotton coat is gone. In the past, our composite materials were glued, threaded, etc. Then ultrasonic compounding, it does not use glue, nor wire, it is environmentally friendly and beautiful.
It is greener and more environmentally friendly than glue.
Compared with the line of cotton, there is no pinhole, it is more warm, and it is more dustproof for dustproof products.
The products are novel and the patterns can be varied. According to the product design pattern.
Only suitable for chemical fiber fabrics, the combination of pure cotton fabric and leather is not strong.
Wireless air conditioner is quilted
Upper shoe embossing compound
Ice bag fabric waterproof insulation composite embossing