Development history and future development trend of melt blown non-woven technology |
| Release：2021/7/29 source： author： browse：563次 |
1、 Important characteristics of melt blown Technology
The characteristics of modern melt blown technology mainly focus on three aspects:
(1) The melt blown process is very short
Resin slicing, melt extrusion, melt filtration and silk spraying into cloth
The general distance from feeding to discharging is only 4m-5m
(2) Melt blown non-woven superfine fiber
Melt blown fiber fineness can reach 1 or 2 microns, which is the smallest fiber diameter that can be achieved by all nonwovens in industrial production, which is the biggest characteristic of melt blown technology and melt blown products.
(3) Melt blown non-woven fabric has unique fiber structure
The fiber structure of melt blown non-woven fabric is stacked three-dimensional porous bonding, with high porosity and large specific surface area.
The above characteristics endow melt blown nonwovens with excellent shielding and isolation, efficient filtration and unique heat preservation and sound absorption.
At present, melt blown nonwovens are widely used in the fields of high-efficiency air filtration, high-efficiency water filtration, medical isolation and protection, industrial isolation and protection, clothing thermal insulation accessories, automobile sound-absorbing materials and so on. Moreover, it has very excellent practical performance in the above application fields and gives full play to its characteristics.
2、 Development of melt blown technology in China
The earliest small-scale testing machine for meltblown process in China appeared in 1983 and was developed by the second Institute of nuclear industry at that time. After 30 years of development, China's melt blown technology level and the production capacity of melt blown nonwovens have undergone earth shaking changes. It is the country with the highest production capacity of melt blown nonwovens in the world and occupies a large share in the international market.
In the development process of China's meltblown technology, three sudden human diseases have played a great role in promoting the progress of China's meltblown technology and the development of the whole industry, making the whole industry a leap in quantity and quality.
3、 Application of melt blown technology in SMS
Due to the fiber plagiarism of melt blown nonwovens, the cloth is dense and has excellent evaluation and isolation function, but it also has the disadvantage of low strength. This disadvantage also limits the application field of melt blown nonwovens to a great extent. In order to expand its application field, International Nonwovens Technology Pioneers invented the production technology and equipment of SMS (spunbonded / melt blown / spunbonded) composite nonwovens by using the strength characteristics of spunbonded nonwovens and the evaluation and isolation characteristics of melt blown nonwovens through the combination of the two processes and technologies. With the continuous improvement and development of processes, technologies and equipment, SMS products are also widely used in the fields of medical and health care, personal care and industrial protection. It has formed a huge industry. The emergence of this new process and new technology has greatly promoted the development of global non manufacturing industry.
4、 Development trend of melt blown Technology
Although China's domestic melt blown equipment has made great progress in technology and melt blown non-woven products have been recognized by the international market, it still needs continuous efforts to improve itself in order to keep up with the development pace of international advanced technology. At present, the key components of domestic high-end melt blown production line equipment still rely on import, because only high-end configuration can produce high-end products that meet the requirements of the international market, such as high-efficiency air filter cloth, which can enter the international market only if it meets the international standards such as BFE, PFE and N95. This requires domestic equipment manufacturers to keep forging ahead, improve the technical level in materials, heat treatment process and precision machining, strengthen the R & D team, and realize the localization of all key components of equipment that meet the requirements of high-end product market as soon as possible.
The development trend of melt blown technology includes the following aspects:
(1) The fiber fineness reaches nanometer level, expanding new application fields;
(2) Multiple rows of holes are realized by melt spray wire to improve the production capacity;
(3) It is suitable for a variety of raw materials to realize industrial production, such as pet, PBT, PPS, degradable resin and other special purposes.
In short, we need to strengthen the R & D of melt blown technology, make continuous efforts to innovate, promote the continuous development of China's Nonwoven Industry and jointly create a more brilliant decade.
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