ANNA UNIVERSITY BTECH VI SEMESTER CHEMICAL PROCESSING OF TEXTILE MATERIAL II

ANNA UNIVERSITY B.TECH

SIXTH SEMESTER – TEXTILE TECHNOLOGY

CHEMICAL PROCESSING OF TEXTILE MATERIAL – II

 

Time: 3 hours                                                                                               Max Marks: 100

Answer ALL Questions

 

PART – A (10 x 2 = 20 marks)

 

1.Compare the nature of Langmuir and Freundlich isotherms.

2.How does the addition of salt help in exhausting the direct dye?

3.What is sulphur black tendering?

4.How does the discharge style of printing differ from the resist style of printing?

5.State the qualities of dyestuff required for vapour transfer printing of polyester?

6.Give the advantages of magnetic squeeze over blade squeeze.

7.State the objectives of wool felting.

8.What is creping?

9.State the conditions used in perspiration fastness testing.

10.What is the role of compactors in knit goods finishing?

 

PART – B (5 x 16 = 80 marks)

 

11.Critically examine about the dyeing of PET fabrics using rapid dyeing technique over conventional technique.                                                                                (16)

 

12.a)Discuss on the role of pH and salt in the dyeing of wool fibre.                     (8+8)

 (OR)

12.b)Compare the properties of various types of reactive dyes.                             (16)

 

13.a)Briefly discuss about the screen preparation for flat bed printing machine.  (16)

 (OR)

13.b)Discuss in detail about the production of cotton printed goods using pigments. (16)

14.a)i)  State the reason for crease formation in cotton materials.

ii) Discuss in detail about the crease proof finish given to cotton materials using DMDHEU                                                                                                  (4+12)

 (OR)

14.b) Briefly discuss about the any four types of calender finishing                      (4+4)

 

15.a)Write short notes on the following                                                                 (8+8)

i)Determination of wash fastness rating

ii)Relax dryers

 

(OR)

15.b)Write short notes on the following                                                                 (8+8)

i)Problems and remedies in garment dyeing

ii)Determination of rubbing fastness rating

 

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