Technical development of melt blown non-woven Fabric
Time： 2021-06-09
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Melt blown non-woven fabric is a material widely used in medical, apparel, and industrial fields. Since the beginning of the 21st century, the technical development of melt blown non-woven fabric in the world has advanced by leaps and bounds. The two-component melt blown technology was researched during this period and it continued to develop towards maturity.
The American Hills Company and Nordson Company have successfully developed two-component melt blown technology earlier, including skin-core, side-by-side, triangular and other types. Usually the fiber size is close to 2µ, and the number of holes in the melt blown spinneret can reach 100 per inch. Hole, the extrusion volume per hole can reach 0.5g/min.
Skin core type
It can make the non-woven fabric feel soft, and can be made into concentric, eccentric and special-shaped products. Generally, cheap materials are used as the core, and expensive polymers with special or required properties are the outer skin layer. For example, the core is polypropylene and the outer skin is nylon to make the fiber hygroscopic; the core is polypropylene, and the outer skin is a low adhesive layer. Melting point polyethylene or modified polypropylene, modified polyester, etc. For carbon black conductive fibers, the conductive core is wrapped inside.
Side by side
It can make the non-woven fabric have good elasticity. It is usually made of two different polymers or the same polymer with different viscosities to make side-by-side bi-component fibers. The different heat shrinkage properties of different polymers can be used to make a spiral type. Crimped fiber. For example, 3M Company has developed a non-woven fabric of melt blown PET/PP bicomponent fibers. Due to the different shrinkage, spiral crimping is formed, so that the non-woven fabric has excellent elasticity.
Peripheral type
This is another type of polymer compounded with three-lobed, cross-shaped and terminal. For example, when making anti-static, moisture-conducting, and conductive fibers, a conductive polymer can be compounded on the top, which can not only conduct moisture, but also conduct electricity, and antistatic. , And save the amount of conductive polymer.
Fine denier type
It can use orange petal-shaped, strip-shaped peeling type components, or sea-island type components. Exfoliation of two incompatible polymers to make superfine fiber nets, or even nanofiber nets, such as the exfoliated two-component fiber developed by Kimberly-Clark, is a two-component fiber made of two incompatible polymers. The component fibers can be completely peeled off in hot water for less than one second to form a superfine fiber network. The island type has to dissolve the sea to obtain a fine island fiber network.
Mixed type
It is a fiber web that combines different materials, different colors, different fibers, different cross-sectional shapes, and even fibers that are side-by-side with the sheath and core, and has both co-spun and two-component fibers, so that the fibers have various properties required. Compared with general melt blown fiber products, this kind of melt blown two-component fiber non-woven fabric or mixed fiber non-woven fabric can further improve the filterability of the filter medium, and make the filter medium have antistatic, conductive, hygroscopic, and enhanced The barrier properties, etc.; or to improve the adhesion, bulkiness, and air permeability of the fiber web.
Jiangyin Sidepu is a professional melt blown non-woven fabric machine supplier. Our technology is advanced and our quality is excellent. If you are interested in melt blown non-woven fabric machines, don’t hesitate to contact us.
