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Features of Nanofiber Nonwoven

New Nanofiber Manufacturing Method

Characteristics of Nanofiber Nonwoven

Chart 1. Nanofiber basis weight and maximum pore diameter

Nanofiber overlaying makes the pore diameter smaller by 2g/m2. Nanofibers are effective to reduce the pore diameter.

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Chart 2. Pore size distribution of nanofiber nonwoven

The chart shows distribution of extra-fine pore sizes.

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Table 1. Physical properties of nanofiber overlaid nonwoven fiber

Type Configuration Base material
(polyolefin)
Basis weight
(total)
Basis weight
(nanofiber)
Thick Density Voids Contraction (%) Tensile strength
120oCx1H kg/15mm
g/m2 g/m2 μm g/cm3 % MD CD MD CD
ZNCH Laminated (double-layered)
(polyolefin/PVA nanofiber)
HOP6 8.4 2.0 24 0.350 67.1 3 0 0.663 0.348
HOP2 4.6 2.0 15 0.307 69.7 - - 0.280 0.290
Laminated (triple-layered)
(polyolefin/PVA
nanofiber/polyolefin)
HOP4 12.7 4.0 26 0.488 55.0 - - 0.825 0.721
HOP4 18.4 8.0 27 0.681 39.0 - - 1.400 0.691
ZNCP PVA nanofiber nonwoven - 2.2 2.2 5 0.440 65.4 - - 0.138 0.070
- 4.8 4.8 8 0.600 52.8 - - 0.190 0.200
- 10.1 10.1 16 0.631 50.3 - - 0.443 0.523
- 17.3 17.3 31 0.558 56.1 - - 0.838 0.791

Chart 3. PE/PP core-in-sheath overlaid nonwoven DSC curve of PVA nanofiber

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Water resistance of PVA nanofiber is achieved by chemical modification. The modified nanofiber is resistant to hot water.

Chart 4. Effects of PVA nanofiber with water resistance improved by boiling on pore size

The structure change by boiling prevents PVA nanofiber's cross-linkage.

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