Then we separate the collected pictures of the defects into different categories so that we can analyze the fabric defects very effectively and determine an acceptable result that will be enough to evaluate the grade of different fabrics and in time it can help us to carry out further activities depending on the established form of work. After evaluating the grade of the material samples, we aimed to find out the real causes of these errors in the industrial area. Then we try to analyze them very effectively to find out the trace of the source and try to solve those problems.
The RMG industry is one of the most potential and profitable sectors in Bangladesh. It started in the late 1970s. It soon became one of the main economic forces of Bangladesh. If we see Figure 1, we can see that in the first moment from 1990 to 2002, the amount of export of woven garments is consistently increasing, which means the consistent growth of local production of woven fabrics.
But after a period of increasing speed of local woven garments production is very low or can say the growth rate is very slow. Buyers can also see where the factory is located, is it in a congested area or outside the city, they can also see how much that factory affects the environment.
Power Consumption
Lack of confidence
Before answer that question we have to look after some facts
High profit achieving tendency
Horizontally integration
New fabric development
Machine conditions
Factory evaluation
Lack of modern design machine
Lack of government patronizations
Other reasons
Chapter :2
Literature survey
- Weaving
- Definition of Defect
- Fabric Defect
- List of Major problems/faults/defects of weaving are pointed out below
- Causes and Remedies of different fabric Defects
- Fabric inspection system
- Definition of inspection
- Object of fabric inspection
- Inspection Instruments/Tools
- Methods followed for fabric inspection process
- To use this system someone have to know following procedure
- Four Point System
- Inspection Procedure under 4 points systems
- Defect Classification according to 4 point system
- Notable points of this system are describing below
The cloth must be stripped of color and dyed red with uniform pressure on the lack of color. The color intensity on one side of the fabric is different from that on the other side. Stains on the machine blanket can cause color spots on the back of the printed cloth.
The temperature during steaming should be evenly distributed and the steam insulation should be improved. Starch spots and white streaks on the finished fabric are created due to incomplete digestion of starch in the filled drink. Weave Band: It is a band that runs across the width of the fabric.
Weft tear: It is a thin spot or missing weft over the entire body of the fabric. Measure the width of the fabric and cut a 6 inch piece the width of the end of the roll.
Chapter - 3
Description of Fabric Defects
- Slub
Causes
Remedy
Hairy fabric
Cause
Remedies
- Thick and thin place
- High twisted yarn
- Oil stained yarn
- knot
- Starting mark
This can occur due to an unremoved double drill, inadequate end treatment by removing overburden, hair build-up in condensers, cradles and in the neck of the upper rollers. The yarn must be checked by QC during procurement to avoid these errors. If the TPI of the yarn is higher, then we will have the given appearance of the fabric.
If the thread contains oil stains, then these stains will appear on the fabric. To avoid these defects, we must be very careful during the procurement of thread. If the yarn breaks during winding, twisting, sizing and knitting this defect can occur.
Reason
Loose warp in fabric
Reasons
Remidies
- Double end
- Broken warp
- Tight end
- Pile of warp or loose yarn
And if the employee doesn't observe this properly, these targets can converge through the same healthy eye and cause this problem. Knotting should be done very carefully so that two or more ends cannot be knotted together. If a warp yarn breaks and the dropper does not fall on the dropper tube, this error occurs.
If the problem is in the dropper bar, we need to replace that bar. If the tension of a warp yarn is greater than that of the other ends in the loom, this problem arises. To solve this problem we need to find these ends and adjust the tension.
Causes
Wrong end colour
After finding the errors, we must remove the defective color yarn and place a correctly colored yarn.
Broken pick
Miss pick
Double pick
Snarl or loose weft
Weft bar
Ball
Holes
Oil spot/Drop mark
Tails out
Temple mark
Temple pierced hole
Cut or torn selvedge
Reed mark
Gout
Crease mark
Color Spot
Shade variation
Bad Selvedge
Uneven printing
Foreign yarn
Some guide lines for identifying defect in Shasha Denims Ltd
A picture of a inspection machine in Shasha Denims Ltd During inspection
Classes of fabric defect according to textile process
Chapter - 4
Discussion Result
- Types of Faults
- Faults occurred in Shasha Denims Ltd
- Faults occurred in Sim Fabrics Ltd
- Process responsible for different fabric faults
From our project work we can find that there are some common defects and there are some different defects that occur in Shasha Denims Ltd and Sim Fabrics Ltd. There are some different defects that occur for Shasha Denims Ltd and Sim Fabrics Ltd according to their different process. Although we found the above error in Shasha Denims Ltd but this type of error is not limited in Shasha Denims Ltd.
Such errors may also occur in the case of Sim Fabrics Ltd and other woven factories. Sim Fabrics Ltd is a satin based fabric industry but twill is also made here. Different types of fabrics such as shirts, pants, trousers, etc. were made here. During our project work we found that the above errors occurred in Sim Fabrics Ltd.
But this type of error is not fixed for this industry, also this type of error can occur in Shasha Denims Ltd and other woven based industries.
Responsible process Name of fabric faults
Relation between Fabric defect and Fabric quality
A fabric defect depends on the quality of the fabric to be produced. During our project we visited two factories, one is a denim-based industry and the other is a satin-based industry. From our project work we can say that if we produce different types of dust such as coarser dust and finer dust, without above errors there may occur different types of errors which we have not observed during project work.
Chapter: 5
Conclusion
Conclusion
