Section outline

  • General

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    Class Schedule 

     
    08.30-09.30
    09.30-10.30
    10.30-11.30
    12.30-01.30
    01.30-02.30
    Saturday
     


     
     
    Sunday
     
     

     
     
    Monday
    B1
     

     

    Tuesday

     
     
     
     
    Wednesday
    B1
    B1
     
     

     

    Counseling Hour :
    Sunday        : 10.30 am -12.30 pm
    Monday       : 10.30 am -12.30 pm
    Tuesday       : 01.30 pm -03.30 pm
    Wednesday :01.30 pm -03.30 pm

  • Introduction

    Welcome Note

    Dear Students,

    Assalamu Alaikum and a very warm welcome to all of you.

    This is Dr. Mainul Morshed (MM) and I am here to conduct your Textile Wet Process-I and share and learn something new about the world of Textile Wet Processing. So, let's gather knowledge with you altogether. Feel free to approach me if would have any kind of problem.

    This course aims to provide students with an in-depth knowledge of the principles of textile preparatory processes and develop the students’ understanding on the important concept and technology of textile coloration.

    Thank you very much.

    Regards,


    Course Teacher

    Dr. Mainul Morshed
    Assistant Professor
    Department of Textile Engineering
    Faculty of Engineering
    Daffodil International University

    Cell : +8801406238336
    Email : mainul.te@diu.edu.bd
    https://orcid.org/0000-0002-8456-6532
    Faculty Website : https://faculty.daffodilvarsity.edu.bd/profile/te/mainul.html

    General Course Description : 

    • Course Title: Textile Wet Process-I
    • Course Code: TE 209
    • Credit Hours: 3 (Theory, 3 contact hours per week) 
    • Prerequisite: None
    • Course Level: Level 2 Term 1


    Course Objectives:

    After the completion of this course students will be able to-

    • Learn about common pre-treatments of textiles, such as bio-polishing, desizing, scouring, bleaching etc.
    • Obtain in-details knowledge of dyeing process of textiles with direct, acid, basic and vat dyes.
    • Know about printing process of woven and knit fabrics with direct, acid, basic and vat dyes by using different methods, including block and screen methods.
    • Learn about different machinery widely used for textile wet processing in Bangladesh.


    Course Content:

    1. Applied Chemistry:

    Water and its importance in textile wet processing, Characteristics and selections of soaping agents, Detergents and its classification, Mechanism of detergency (mono molecular layer, micelle formation, surface and interface, Wetting and dispersing), properties and applications of detergents;

    2. Technology of Pre-treatment:

    Pre-treatments and It’s necessities, Flow-chart of textile wet processing, Singeing and its importance, Bio-polishing of cotton fabrics, Desizing and its benefits, Enzymatic de-sizing method, Scouring of cotton, jute, wool and silk fibres, Bleaching of cotton, jute, wool and silk fibres, Importance of textile mercerization of cotton.

    3. Technology of Dyeing:

    Basic concepts of color and its constitution (chromophore, chromogene, auxochrome, anti-autochrome, Resonance theory), Definition of dyestuffs and Pigments, Classification of dyes and pigments, History of dyeing, Structure, characteristics and application methods of direct, acid, basic and vat dyes, Dyeing machineries used for different dyeing processes (for loose fibres, yarn, packages, fabrics), Continuous, semi-continuous and discontinuous dyeing processes.

    4. Technology of Printing:

    Textile printing and its applications, Flow chart of textile printing or stages of textile printing, Ingredients of print paste, Thickeners and its classification, Methods and styles of textile printing, Machineries used for textile printing, Methods of printing on different fabrics with direct, acid, basic and vat dyes.


  • Library Resources and References

    Modern Library Resources and Services - Library & Information Science Network

  • Introduction to Wet Processing

     



    Chapter Objectives : 

    To teach the students about 
    1. Water & it’s importance in textile wet processing, 
    2. Water hardness & it’s measuring units, 
    3. Types of water hardness, Classification of water based on hardness, 
    4. Different scales of hardness measurement, 
    5. Standard quality of water required to be used in textile processing and boiler house.


    Chapter Outcomes :

    After completing this chapter Students can,
    1. Able to discuss about the importance of water in wet processing.
    2. Differentiate hard water from soft water. 
    3. Know about the mechanism of water treatment.
    4. Know about standard quality of water required to be used in textile processing and boiler house.

  • Singeing Process


  • Desizing


    • resource icon
      5) Desizing File
      Students must
      Mark as done
    • assign icon
      H.W. Assignment
      Students must
      Mark as done

      Why Enzymatic Desizing is preferred?

  • Surface Active Agents


    • resource icon
      6) Surface Active Agents File
      Students must
      Mark as done
    • assign icon
      H.W. Assignment
      Students must
      Mark as done

      Differences between Anionic, Cationic, Amphoteric and Non ionic Surfactants.

  • Scouring



  • Bleaching


  • Basic Concepts of Colors and Constitution


  • Vat Dye


  • Acid Dye


  • Basic Dyes


    • resource icon
      12) Basic Dyes File
      Students must
      Mark as done
    • assign icon
      H.W. Assignment
      Students must
      Mark as done

      Why basic dyes are not suitable to dye cotton fibers?

  • Direct Dye


  • Printing

    Printing

    High Quality Thermochromic Products | Atlanta Chemical Engineering

    Chapter Objectives : 

      1. To teach the students about the fundamental of printing technology
      2. Learn about the printing mechanism.
      3. Learn about the Steps of textile printing
      4. To teach them about Chemicals/ingredients used in printing
      5. Types of thickeners
      6. Methods of printing & Styles of printing

    Chapter Outcomes :

    After completing this Chapter Students can,

      1. Learn about the styles and methods of printing.
      2. Know how will printing can be done on textile materials.
      3. Know about several how to apply print paste onto the fabric.
      4. Know why thickener is essential in printing

    Lecture Content: 

    Introduction to textile printing, steps of textile printing, chemicals/ingredients used in printing, Thickeners and their functions in printing, Types of thickeners, Methods of printing, styles of printing.


  • Assignment

    Assignment Topic:

    Regulations:
    # The Assignment should be submitted hard copy first on or before 2/10/2023.
    # For late submission there will be negative marking.
    # Assignment can be submitted in both printed or hand written format.
    # There is no limit of pages (but should not provide a thesis)
    # It Should be submitted by each and every single student by him/herself.
    # Any kinds of copy from other classmate's assignment would cause negative marking.
    # Every single student must submit the soft copy (.pdf version) of his/her assignment on or before 15/10/2023 on BLC.  only soft copy submission will not be considered.
    # Late submission on BLC will also cause negative marking.
    # For online soft copy submission, students are must follow the criteria:
    File name should be (Section + Student ID + Student Name)

    DeadLine: 02/10/2023
    • assign icon
      Assignment Submission
      Students must
      Mark as done

      Must submit the soft copy of your assignment here using the file name as follows---

      File name: Student name+Student ID


      File type should be .pdf