Table 1.
Technical specifications of denim fabrics
| Composition | Weave | Mass per unit area (g/m2) | Weft density (picks/cm) | Warp density (picks/cm) | |
|---|---|---|---|---|---|
| Denim fabric sample | 100% CO | 3/1 Z | 340 | 22 | 28 |
Table 2.
Different concentrations of TiO2 and H3BO3 in back-coating pastes
| Code | Fabric specimen | H3BO3 solution* (wt%) | TiO2 solution** (wt%) | PU based binder (wt%) | Thickener solution*** (wt%) | Crosslinker agent (wt%) |
|---|---|---|---|---|---|---|
| UDF | Untreated cotton denim fabric | - | - | - | - | - |
| B/PU | Cotton denim fabric coated with H3BO3 containing back-coating paste | 7.5 | - | 15 | 2.2 | 3 |
| BT/PU | Cotton denim fabric coated with H3BO3 and TiO2 containing back-coating paste | 7.5 | 5 | 16 | 2.2 | 3 |
Fig. 1.
Schematic illustration of back-coating application of cotton denim fabrics
Fig. 2.
Air permeability of cotton denim fabric before and after back-coating application
Fig. 3.
Water vapor permeability of cotton denim fabric before and after back-coating application
Fig. 4.
Thermal conductivity and thermal resistance of cotton denim fabric before and after coating with B/PU and BT/PU
Fig. 5.
Thermal absorptivity and thickness of cotton denim fabrics before and after coating with B/PU and BT/PU
Table 3.
Vertical flame results and limited oxygen index (LOI) values
Fig. 6.
Images of uncoated and B/PU-BT/PU coated cotton denim fabrics following the vertical flame test