To find the mass of water to be evaporated, we begin by understanding the relationship between the size paste concentration, target add-on, and the dry mass of the warp sheet. Given:
- Dry mass of warp sheet (mdry): 100 kg
- Target add-on (add-on): 10%
- Size paste concentration: 20%
Step 1: Calculate the mass of size added (msize) using the add-on percentage:
msize = mdry × (add-on / 100) = 100 kg × 0.10 = 10 kg
Step 2: Determine the total paste mass (mpaste) knowing the size paste is 20% concentration. Hence, the size itself is 20% of mpaste. Therefore:
mpaste = msize / (0.20) = 10 kg / 0.20 = 50 kg
Step 3: Find the mass of water in the paste (mwater) as the difference between the total paste mass and the mass of size added:
mwater = mpaste - msize = 50 kg - 10 kg = 40 kg
Conclusion: The mass of water to be evaporated from the warp sheet is 40 kg. This value fits within the provided range of (39.9, 40.1).
Important Questions from FABR Woven Fabric Preparation Sizing
- If both the concentration (%, w/w) of size paste and target add-on are 12%, the total wet pick-up (kg) by 12 kg bone-dry warp sheet is
- The ingredient that is NOT used in sizing formulations is
- Compared to conventional sizing, the wet sizing process reduces
- For multifilament yarns, optimum add-on (%) of size is in the range
- In cotton yarn sizing, the starch primarily acts as
