ANNA UNIVERSITY BTECH, VI SEMESTER, TECHNOLOGY OF FINISHING I

ANNA UNIVERSITY B.TECH,

VI – SEMESTER , TECHNOLOGY OF FINISHING – I

TEXTILE CHEMISTRY

 

Time: 3hrs                                                                                          Max Marks: 100

 

Answer ALL Questions

PART – A (10 x 2 = 20 marks)

 

1. What is the importance of Textile Finishing?

2.Classify the finishing processes.

3.What is the mechanism of creasing?

4.What are the essential requirements for Durable finish?

5.Classify the catalysts.

6.What is the mechanism of whitening action?

7.How to evaluate OBA efficiency?

8.What is limiting oxygen Index?

9.Distinguish between water proof and water repellent finish.

10.How to evaluate the efficiency of soil release finish?

 

PART – B (5 x 16 = 80 marks)

 

11.i)State the role of catalyst in resin finishing.                                                     (8)

 ii) Explain essential requirements for wash-n-wear finish.                                  (8)

 

12.a)i)  Explain the mechanism of whitening action.                                                  (8)

ii)  Discuss the terms “Saturation brightness” and “Subjective brightness”?       (8)

 

(OR)

 

12.b)i)  Discuss whitening action of ultramarine Blue.                                               (8)

 ii)  Explain how to select suitable classes formulae of OBA for PET.                (8)

 

13.a)i)  Discuss in detail thermal behaviour or fibres.                                     (8)

 ii)  Explain various flame retardant finishes for polyester and its blends.           (8)

 

(OR)

 

13.b)i)Explain in detail permanent flame retardant finishes for cotton.                   (8)

 ii)  State how flame retardant finish can be impart to silk.                                  (8)

 

14.a)i)  Explain in detail with recipe for imparting water proof finish to Nylon.       (8)

 ii)  Discuss how to evaluate Rot proof finishing.                                                 (8)

 

(OR)

 

14.b)i)  Explain in detail how soil release finish can be impart to cotton.                   (8)

 ii)  Discuss how mildew finish can be impart to cotton.                                      (8)

 

15.a)i)  Discuss the problems and causes for pill formulation.                                    (8)

 ii)  What are all the physical method to reduce pilling?                                       (8)

 

(OR)

 

15.b)i)  Explain how to evaluate antipilling finishing.                                                (8)

 ii)  Discuss various chemical methods to reduce pilling.                                      (8)

 

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