Study of different stitch typesAsad Munir

National Textile UniversityBSc. Textile Engineering

Garments Manufacturing

LAB REPORTIndustrial Engg. In Garments manufacturing GM-3042 Semester: 6th Section: DExperiment No.2To study different stitch typesAsad Munir12-NTU-190Date Experiment was conducted: May 8, 2015.Date Report was submitted: May 15, 2015.

Abstract:

I studied in this experiment the different stitch types i.e. class 100, 200, 300, 400, 500 and class 600. The machines used in this experiment are flat lock, overlock and lock stitch machine. While doing the experiment, First of all I placed the fabric under flat lock machine and stitched the fabric. Then, I observed its class 100. Then I placed the fabric under lock stitch machine and it was class 300 stitch. Then, I placed the fabric under overlock machine and observed it and it was class 500 and class 600.I observed in the experiment and come to know that class 100, 200, 300, 400, 500 and 600 are different from each other and these are used for different purposes in stitching. It is used for fashion and safety purposes in apparel industry.

Table of Contents

iAbstract:

iTable of Contents

11.Introduction

11.1.Objectives

11.2.Theory

12.Equipment and Materials

23.Method

4. Observation and calculations.....2

25.Results/Conclusion

26.Reference

7. Appendix...3

1. Introduction

1.1. ObjectivesThe main objective of this experiment is to study the different stitch types used in stitching in our apparel industry.1.2. TheoryClass 100:

In chain stitching, same thread is used to interconnect each loop. Stitch can be easily unpicked from the last to the first. This type of stitching is generally used for temporary stitching. The appearance of face and back are different in apparel. Chain stitching is done for pocket opening.

Class 200:

This type of Stitch class consists of hand formation of stitches which is done by hand with the exception of 205, which simulates a hand running stitch but is formed by a special machine. Typical types of this class are basting stitches and back stitches. Class 300:

The lock stitch class 300 is the most commonly used in our industry and is easiest one to understand. Lock stitch machine requires 2 threads to form a stitch, a needle thread that feeds from the top and a lower thread that feeds from a bobbin. Lock stitch machines are versatile and can be used for a variety of operations. It is also the only stitch formation that can be back stitched.Class 400:

This is the second most frequently used stitch type in the industry. This is multi thread chain stitch which requires one or more needle threads that form loops as they pass through the fabric and interloop with the looper thread on its underside, all of which feed continuously from the cones. The 400 class requires an upper and a lower thread and use a looper to carry the lower thread and form a thread loop on the underside of the fabric. Some properties of class 400 are i.e. Non ravel, strong, have good elasticity, less likely to cause seam pucker due to structural jamming, have Good seam stretch, does not need to wind bobbin, lower resistance to runback and have increased bulk under the seam. The stitch types in this class are formed with one or more groups of threads, and have as a general characteristic that loops from at least one group of threads pass around the edge of the material. Class 600:

The type of stitch is called as cover stitch or 600 class, often called a flat lock or a flat seam stitch. This type is an advanced version of the 400 class. This is used oftenly on knits and lingerie, High elasticity, seam neatening and flat seam stitch.

The machine is of high speed and there is no need of Bobbin. In it there is greater thread consumption. Covering stitches are used for decorative purpose, Can be used to join two raw edges. It is suitable for knitted garments.2. Equipment and Materials

Thread

Fabric

Machine

3. MethodWhile performing the experiment I set the machine. Then I placed the fabric under the machine and class 100 stitch is applied on the fabric and observed its appearance. Then I made class 200 stitch on the fabric and observed it. Then I made class 300 stitch on the fabric and observed it. In the same way I produced class 400,500 and 600 stitch types on the fabric and observed them, their look and appearance. All these stitches are different and are produced from different machines but the overlock machine is used for both class 500 and 600 stitch.4. Observation and CalculationS.noStitch ClassStitch CodeNo of ThreadsNo of Needle ThreadNo of looper threadNo of spreader threadSPI

1Class-3003012110

2Class-1001012119

3Class-40040632111

4Class-40040743110

5Class-600605531110

6Class-5005124229

7Class-50050431210

8Class-50051652314

5. Results/ConclusionThe different types of stitches are observed and applied on the fabric precisely and accurately. Studied different types of machines with the help of which the stitches are applied. The different types of stitches are applied on fabric and understand the applications of these stitches in garments.6. Reference

www.sewing.about.comwww.definetextile.com/2013/12/overlock-sewing-machine.html7. AppendixPAGE 2