Question 60 (Textile Engineering & Fibre Science)
Consider the following assertion [a] and reason [r] and chose the correct alternative from amongst A, B, C and D.
[a] In the context of foam finishing, the narrow size distribution of foam cells increase the half life of foam.
[r] The rate of coalescing and collapsing of foam cells is low in this case.
| (A) | [a] is right and [r] is wrong |
| (B) | [a] is right and [r] is right |
| (C) | [a] is wrong and [r] is wrong |
| (D) | [a] is wrong and [r] is right |
[Show Answer]
Option B
Frequently Asked Questions | FAQs
What is the advantage of foam finishing?
Foam finishing in textiles is a specialized textile finishing technique that involves the application of finishing chemicals in the form of foam to the fabric surface. This method offers several advantages over other conventional methods of finishing, such as exhaustion, padding, or spray application. Some of the advantages of foam finishing in textiles include:
Controlled and Uniform Application: Foam finishing allows for precise and controlled application of finishing chemicals onto the fabric surface. The foam can be easily controlled in terms of its thickness, concentration, and coverage, resulting in a more uniform and consistent application of the finishing chemicals across the fabric. This can help achieve desired finishing effects with better reproducibility and reduced variability.
Reduced Chemical Consumption: Foam finishing can lead to reduced chemical consumption compared to other methods, as the foam can be generated with lower concentrations of finishing chemicals. This can result in cost savings and reduced environmental impact by minimizing chemical waste.
Lower Water Consumption: Foam finishing typically requires less water compared to other conventional methods such as padding or exhaustion. This can result in water savings, reduced energy consumption for water heating, and shorter drying times, leading to overall process efficiency.
Enhanced Penetration and Absorption: Foam has a higher surface area compared to liquid, which can improve the penetration and absorption of finishing chemicals into the fabric fibers. This can result in more effective utilization of the finishing chemicals and better performance of the finished fabric in terms of desired properties such as softness, water repellency, or flame retardancy.
Improved Occupational Health and Safety: Foam finishing can offer improved occupational health and safety benefits for workers, as it reduces the potential for direct contact with concentrated finishing chemicals compared to other methods such as spraying or padding. This can result in a safer working environment for textile finishing operations.
Versatility and Flexibility: Foam finishing can be used for a wide range of textile substrates, including woven, knitted, and non-woven fabrics, as well as for different types of finishing chemicals. This makes it a versatile and flexible finishing method that can be adapted to various textile applications and requirements.
Reduced Equipment Contamination: Foam finishing can minimize the risk of cross-contamination of finishing chemicals between different equipment, as the foam is typically contained within a closed system. This can result in reduced contamination of equipment and simplified cleaning processes.
Overall, foam finishing in textiles offers several advantages, including controlled and uniform application, reduced chemical and water consumption, enhanced penetration and absorption, improved occupational health and safety, versatility, flexibility, and reduced equipment contamination. However, like any textile finishing method, foam finishing should be conducted in accordance with applicable regulations and best practices to ensure safety, quality, and environmental sustainability.
What is foam in textile?
Foam finishing in textiles is a specialized textile finishing technique that involves the application of finishing chemicals to the fabric surface in the form of foam. Foam is a dispersion of gas bubbles in a liquid, and in the context of textile finishing, it refers to a stable and controlled dispersion of gas bubbles in a liquid medium containing finishing chemicals. The foam is generated using specialized equipment, such as foam generators, which produce foam by mixing air or gas with a liquid solution containing the finishing chemicals.
The foam is then applied onto the fabric surface using various methods, such as foam padding, foam spraying, or foam printing. The foam is typically applied to the fabric surface, and the finishing chemicals are absorbed by the fabric fibers, resulting in the desired finishing effects.
Foam finishing is used for a wide range of textile applications, including but not limited to:
Softening: Foam finishing can be used to impart softness to fabrics, making them more comfortable to wear or touch.
Water repellency: Foam finishing can be used to create a water-repellent or water-resistant effect on fabrics, making them resistant to water penetration and suitable for outdoor or performance applications.
Stain resistance: Foam finishing can be used to create a stain-resistant effect on fabrics, making them less prone to staining from common household substances such as food, beverages, or dirt.
Flame retardancy: Foam finishing can be used to impart flame-retardant properties to fabrics, making them less prone to ignition and reducing the spread of flames.
Anti-static properties: Foam finishing can be used to impart anti-static properties to fabrics, reducing static electricity buildup and preventing static-related issues.
Wrinkle resistance: Foam finishing can be used to create a wrinkle-resistant effect on fabrics, reducing the formation of wrinkles and improving the fabric’s appearance.
Other functional properties: Foam finishing can be used to achieve various other functional properties in textiles, such as anti-microbial properties, UV resistance, or odor resistance.
Foam finishing offers several advantages, including controlled and uniform application, reduced chemical and water consumption, improved penetration and absorption of finishing chemicals, versatility, flexibility, and reduced equipment contamination. However, like any textile finishing method, foam finishing should be conducted in accordance with applicable regulations and best practices to ensure safety, quality, and environmental sustainability.