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  • Melt-blown nonwoven technology knowledge

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    The processes of melt-blown non-woven fabrics,Melt-blown non-woven process: polymer feeding - melt extrusion - fiber formation - cooling - into a network - reinforcement into cloth.,Melt-blown nonwovens technology development - a two-component melt-blown technology

    Since the 21st century, the international on melt-blown nonwovens technology development by leaps and bounds. The Hills earlier Nordson corporation and successful development of bicomponent melt-blown technology, including sheath-core, paratactic type, triangle, etc, usually fiber denier close to 2 & micro; The number of holes, melt-blown spinning components may reach 100 per inch, every hole extrusion quantity can reach 0.5 g/min.

    1: sheath-core: can make nonwoven fabric to achieve soft, can be made into concentric and eccentric, special-shaped products. Generally cheap material core, expensive, with special or the required performance of the polymer to outer cortex, such as the core for polypropylene, skins for nylon fibers with moisture absorption; Core for polypropylene, the skin to be glued or move the low melting point of polyethylene or modified polypropylene, modified polyester, etc. In carbon black conductive fiber, the conductive core is wrapped in it.

    Melt-blown nonwovens technology development - a two-component melt-blown technology

    2: parallel model: can make nonwoven fabric has good elasticity, is usually composed of two different polymers, or the same of different viscosity polymer into parallel type bicomponent fiber, using different polymer thermal shrinkage but make it spiral curly fibers. For example, 3 m company developed melt-blown PET/PP bicomponent fiber nonwovens, due to different shrinkage, form a spiral crimpness, make nonwovens has excellent flexibility.

    3: peripheral type: this is the 3 leaf type, cross and peripheral compound another polymer, such as antistatic, wet, conductive fiber can be on top of composite conductive polymers, as well as wet, conductive, antistatic, conductive polymer injection amount and saved.

    4: micro fine denier type: can use orange disc strip shape, strip type components, can also be a sea island component. Made with two incompatible polymer pares crack superfine fibres, even nano fibres.

    5: hybrid: it's a different material, different color, different fibers and different cross section shape, even along with sheath-core fiber blend of both cospinning, and bicomponent fiber mat, the properties of the fibers are needed. This kind of melt-blown bicomponent fiber nonwovens or hybrid fiber and general melt-blown nonwoven fabric products compared to further improve the filterability of filter medium, and the filter medium with antistatic ability, electrical conductivity, moisture absorption, enhanced barrier property, etc. Or make web of caking property, fluffy, permeability is improved.

    A two-component melt-blown fiber can supplement the shortage of the single polymer performance, such as polypropylene is cheaper, but if used for health care material, it is not resistant to radiation exposure, so can polypropylene as the core, select the appropriate radiation resistant polymer in its outer package can solve the problem of radiation resistant outside. Which can make the products cheaper price, and can complete functional requirements, such as in the medical field can be used in respiratory exchange of heat and wet, can provide the appropriate similar natural heat and humidity. It has light, use can be abandoned or easy to disinfect, price cheap, also can have the additional role filters to remove pollutants. It can be made of two kinds of mixing a two-component melt-blown fibres. Using sheath-core bicomponent fiber, core for polypropylene, cortex for nylon. Bicomponent fiber can also be used profiled, such as 3 leaf shape, leaf shape, make its surface area is bigger, also can be in the surface layer or tip part adopts filtering can improve the performance of the polymer. Olefin or polyester melt-blown bi-component fibres can be made into cylindrical liquid and gas filter. Melt-blown bi-component fibres can also be used for cigarette filter tip; Use a core absorption effect for high-grade ink absorption core; Fluid and infusion of core rod, etc.

    A two-component melt-blown fiber can supplement the shortage of the single polymer performance, such as polypropylene is cheaper, but if used for health care material, it is not resistant to radiation exposure, so can polypropylene as the core, select the appropriate radiation resistant polymer in its outer package can solve the problem of radiation resistant outside. Which can make the products cheaper price, and can complete functional requirements, such as in the medical field can be used in respiratory exchange of heat and wet, can provide the appropriate similar natural heat and humidity. It has light, use can be abandoned or easy to disinfect, price cheap, also can have the additional role filters to remove pollutants. It can be made of two kinds of mixing a two-component melt-blown fibres. Using sheath-core bicomponent fiber, core for polypropylene, cortex for nylon. Bicomponent fiber can also be used profiled, such as 3 leaf shape, leaf shape, make its surface area is bigger, also can be in the surface layer or tip part adopts filtering can improve the performance of the polymer. Olefin or polyester melt-blown bi-component fibres can be made into cylindrical liquid and gas filter. Melt-blown bi-component fibres can also be used for cigarette filter tip; Use a core absorption effect for high-grade ink absorption core; Fluid and infusion of core rod, etc.