Question:
The water repellency of fabric can be improved by application of the __________ finishes.
The water repellency of fabric can be improved by application of the __________ finishes.
Show Hint
Fluorocarbons are the gold standard for outdoor gear. Options 2, 3, and 4 are actually surfactants or fats that often *help* water penetrate or clean the fabric!
Updated On: May 26, 2026
- silicones and fluorocarbons
- sodium lauryl sulphate
- fatty acids
- alcohol ethoxylates
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Concept:
Water repellency is a functional finish that allows a fabric to resist wetting by water. Unlike "waterproof" coatings, water-repellent finishes keep the fabric "breathable" by not blocking the pores between yarns.
Step 1: Surface Energy Principles.
To repel water, the surface energy of the fiber must be made much lower than the surface tension of water. This causes water droplets to "bead up" and roll off rather than soaking in.
Step 2: Effective Finishing Chemicals.
The most effective chemicals for this purpose are silicones and fluorocarbons.
• Silicones: Form a thin, water-repellent film around the fibers while maintaining a soft "hand."
• Fluorocarbons: Provide the highest level of repellency, protecting against both water and oil-based stains (dual-action).
Step 1: Surface Energy Principles.
To repel water, the surface energy of the fiber must be made much lower than the surface tension of water. This causes water droplets to "bead up" and roll off rather than soaking in.
Step 2: Effective Finishing Chemicals.
The most effective chemicals for this purpose are silicones and fluorocarbons.
• Silicones: Form a thin, water-repellent film around the fibers while maintaining a soft "hand."
• Fluorocarbons: Provide the highest level of repellency, protecting against both water and oil-based stains (dual-action).
Was this answer helpful?
0
0
Top CUET PG Textile Engineering Questions
- In \(\underline{\hspace{2cm}}\), the package is driven in frictional contact with the drum.
- In \(\underline{\hspace{2cm}}\), the yarn passes through two plates in which one plate is the baseplate and the other is a weighing plate.
- In case of plain weave fabric, the respective warp and weft counts are 30 tex and 20 tex, with 40 ends per cm and 30 picks per cm. The warp has 10% crimp and weft also 10% crimp. Calculate the weight of fabric in grams/square meter.
- In \(\underline{\hspace{2cm}}\) system, a warping beam with a complex pattern of colored stripes is obtained.
In the slasher sizing machine, the principle involved in drying the wet warp sheet by physical contact with a hot drum surface is \(\underline{\hspace{2cm}}\)
View More Questions
Top CUET PG Textile Pre-treatment and Finishing Questions
The process of removal of protruding fibers from the surface of fabric is called as \(\underline{\hspace{2cm}}\)
Objectives of scouring of cotton.
A. To remove natural fatty matter from textiles.
B. To remove added fatty matter from textiles.
C. To remove pectins from textiles.
D. To remove coloring matter from textiles.Desizing of a grey cotton fabric having a starch-based size can not be done using \(\underline{\hspace{2cm}}\)
- The surface of the fabric is made smooth and lustrous by using the singeing process, in which the __________ takes place.
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Polyester does not require desizing before dyeing. Reason (R): Polyester contains natural waxes and pectins. In the light of the above statements, choose the most appropriate answer from the options given below:
Top CUET PG Questions
- Given below are two statements:
Statement I: For Plato the meaning of the word 'Justice' is basically a conception in the mind only.
Statement II: For Plato the meaning of the word 'Justice' is fixed, mind-independently
In the light of the above statements, choose the correct answer from the options given below: - What is the electron count of OS6CO182-?
- XeF4 hydrolysis gives A + B, HF, and Oxygen. Find A and B
- What is more basic in pyrol and pyridine?
- Hydrolysis of Al2C3, Be2?
View More Questions