MELT-BLOWN NONWOVEN FABRIC, METHOD OF PRODUCING THE SAME, LAYERED BODY, FILTER FOR FACE MASK, AND FACE MASK
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Dec 2, 2022
filing date -
Dec 2, 2022
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Abstract
The present invention provides, for example, a melt-blown nonwoven fabric with high strength, high stretchability, and high particle filtration efficiency. The present invention is, for example, a melt-blown nonwoven fabric including fibers. The fibers are formed from a resin composition that contains a poly(3-hydroxyalkanoate)-based resin. A melt mass-flow rate of the resin composition at 160° C. is 90 to 700 g/10 min, and/or a weight-average molecular weight of the resin composition is 120000 to 200000. An areal weight of the melt-blown nonwoven fabric is 20 to 80 g/m2. An average value of a fiber diameter of the fibers is 1.7 to 3.0 μm. A coefficient of variation of the fiber diameter of the fibers is less than or equal to 0.36.
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