Table 3. Test results of pressure difference and spray rating for single-layer materials.
| Material | pressure difference | Spray Rating | ||||||
|---|---|---|---|---|---|---|---|---|
| t/T value | P value | Qualified or Not | Median | T value | P value | Qualified or Not | ||
| T-shirt | 15.80±1.01 | -73.148 | 1.000 | Yes | 0 | 0.000 | 0.013 | No |
| Fleece sweater | 5.86±0.42 | -228.642 | 1.000 | Yes | 3 | 3.000 | 0.922 | Yes |
| Outdoor jacketa | - | - | - | No | 4 | 15.000 | 0.981 | Yes |
| Down jacket | 125.10c | 15.000 | 0.022 | No | 4 | 15.000 | 0.983 | Yes |
| Sun-protective clothing | 125.00c | 15.000 | 0.021 | No | 4 | 15.000 | 0.983 | Yes |
| Jeans | 124.62±0.99 | 170.201 | <0.001 | No | 1 | 0.000 | 0.019 | No |
| Hairy tea towel | 13.72±0.53 | -148.556 | 1.000 | Yes | 1 | 0.000 | 0.017 | No |
| Granular tea towel | 5.72±0.13 | -742.246 | 1.000 | Yes | 1 | 0.000 | 0.019 | No |
| Non-woven shopping bag | 7.06±0.27 | -347.098 | 1.000 | Yes | 4 | 6.000 | 0.949 | Yes |
| Vacuum cleaner baga | - | - | - | No | 4 | 10.000 | 0.977 | Yes |
| Diaper | 125.44±0.87 | 196.323 | <0.001 | No | 1 | 0.000 | 0.013 | No |
| Sanitary pad | 125.44±1.09 | 156.163 | <0.001 | No | 1 | 0.000 | 0.017 | No |
| Pillowcase A | 125.34±0.63 | 268.896 | <0.001 | No | 0 | 0.000 | 0.013 | No |
| Pillowcase B | 67.80±0.88 | 47.752 | <0.001 | No | 1 | 0.000 | 0.017 | No |
| Pillowcase C | 26.86±0.58 | -85.791 | 1.000 | Yes | 1 | 0.000 | 0.017 | No |
| Medical non-woven fabric | 35.98±1.85 | -15.738 | 1.000 | Yes | 4 | 0.000 | 0.981 | Yes |
| Medical gauze (4 layers)b | 6.02±0.64 | -150.645 | 1.000 | Yes | - | - | - | No |
| Medical gauze (8 layers)b | 6.36±0.42 | -225.992 | 1.000 | Yes | - | - | - | No |
| Medical gauze (12 layers)b | 8.94±0.50 | -178.088 | 1.000 | Yes | - | - | - | No |
| Medical gauze (16 layers)b | 17.52±1.33 | -52.880 | 1.000 | Yes | - | - | - | No |
a The pressure difference of outdoor jacket and vacuum cleaner bag cannot be tested caused by too high ventilation resistance.
b The resistance to surface wetting of medical gauze is not considered, given its main function is to wrap wounds and clean up bloodstains.
c Median.