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Meltblown nonwoven fabric is a commonly used material for making high-quality masks. Nonwoven means that it is produced directly from fiber stage (if it is a natural fiber) or from polymer (in the form of particles) to produce fabric, without the intermediate process of spinning or yarn formation. Meltblown nonwoven fabric is made from thermoplastic synthetic polymers and is produced directly from the polymer stage by meltblown spinning technology to form randomly laid non-woven mats or fabrics.
The meltblown process is a one-step process that converts polymer chips or particles into a randomly laid fiber network structure. The chips or particles are heated and turned into a molten polymer solution (using a series of heating elements), which is then blown by hot air onto a rotating drum (which can be horizontal or vertical), forming a tangled fiber web on the surface of the drum.
Generally, the fibers produced by this system have a diameter range of 1μm to 10μm. Meltblown webs are softer, bulkier and more fragile. Compared with spunbonded webs, they have smaller pore sizes and higher filtration efficiency. Due to its lower strength, in most filter applications, this meltblown fiber medium is used together with another web for support or as part of a composite structure. The most widely used polymer for this type of fiber network formation is polypropylene (PP).
Meltblown nonwoven fabric is used for medical and health materials: The key filtration layer that can filter bacteria, viruses, and dust in medical masks is meltblown nonwoven fabric, which is the high-end use of meltblown nonwoven fabric now.
Meltblown nonwoven fabric is used for oil absorption materials: PP meltblown nonwoven fabric is a good oil absorption material due to its material characteristics and ultra-fine fiber structure. It is widely used in developed countries such as Europe, America, and Japan, such as offshore oil spills, factory equipment oil spills, sewage treatment, etc. Polypropylene meltblown nonwoven fabric has the characteristics of hydrophobicity, oil repellency, resistance to strong acid and alkali, density less than water, and long-term floatation without deformation after oil absorption. It can be made into oil-absorbing ropes, oil-absorbing chains, oil-absorbing pillows, etc., and the oil-absorbing capacity can reach 10 to 50 times its own weight.
Meltblown nonwoven fabric is used for insulation materials: Thermal insulation materials (clothing) have good thermal insulation properties and can be used for a longer time without changing their thermal insulation properties. PP meltblown nonwoven fabric has excellent properties such as lightness, thinness, softness, warmth, and breathability. It solves the problem of large external and small internal thermal insulation of military winter clothing and has become a new type of filler and designated insulation clothing for the army, land, sea, and air.
