To calculate the lint percentage and
trash percentage in the given samples of bale cotton by the use of Shirley
Analyzer machine.
Abstract:
To
measure the lint and trash percentage to check the quality of cotton bale. The percentage
of lint and trash of cotton was measured by Shirley analyzer machine. The
cotton is feed into the machine and was cleaned up, while the trash is
separated. We calculated the weight of trash and percentage of lint and trash.
Objectives:
· To understand the method to calculate the lint
percentage in the given sample of bale cotton.
· To understand the method to calculate the trash
percentage in the given sample of bale cotton.
Theory:
Lint
content:
Lint is the common name for visible
accumulations of textile fibers. Lint content is the portion that consist of
fiber and is free from trash.
Trash
content:
The amount of material other than fibers
present in sample.
Invisible
waste:
The part of sample not accounted for by adding
together the lint and trash content.
Shirley analyzer:
Equipment:
1. Shirley analyzer machine
2. Bale cotton
3. Weight balance
procedure:
We took the100gm of cotton sample from blow room department. The sample was opened manually and feed into the Shirley analyzer. The trash was collected along with lint and feed to the machine. The small amount of lint was collected again having impurities from the trash box and fed to the machine. The lint was weighed i.e. l2. The trash was collected from trash box(T1+T2) and was weighed on an electronic weight balance. The lint was fed again to analyzer and l4 was gotten. Finally, the trash was collected from trash box and weighed it on an electronic weight balance. Also, l5 was there. The final trash was also weighed,
Total pure lint = l2 + l4 + l5
Cage loss= 100 – Sum of lint and trash
Observations and calculations:
Sample weight= 50g
Lint= 45.93g
Weight of trash= 3.65g
Hand trash/ total trash= 6.82g
Cage loss= 100g – (weight of trash + weight of cotton)
= 50g - (45.93+3.65)
= 0.42g (invisible weight)
Trash percentage= total trash/ sample weight ×100
= (3.65/50) ×100
= 7.3%
Lint percentage=weight of lint/ sample weight ×100
= (45.93 / 50) ×100
=91.86%
Invisible percent= (0.42/50)×100
= 0.84%
Result:
The result shows that there was 3.65g of total trash and the weight of cotton was 45.93gm and the cage loss was 0.42gm.
Lint percentage of sample= 91.86%
Trash percentage of sample= 7.3%
Safety measures:
· Select the sample of bale carefully so that it should be true representation of the bale cotton.
· Trash from the box and the lint from delivery box of machine must be collected carefully for accuracy.
· Weight the trash and lint carefully.
· Weight balance should free from errors.
Discussion:
As Shirley analyzer provides an effective means for both quantitative and qualitative analysis of foreign matter in cotton lint. So, we calculated the lint and trash percentage of given sample of cotton bale. The trash was fed to separate all the cotton from trash. The trash was weighed accurately by confirming that weight balance should free from errors. It is seen that the cage percentage is very small but it imparts in trash i.e. it is not negligible.
Questionnaire:
1. What is cage loss?
Ans: It is invisible waste. The part of sample not accounted for by adding together the lint and trash content.
2. What is the use of Shirley Analyzer Machine?
Ans. To determine the percentage of trash, lint and dust content with the sample of cotton bales, blow room lap, carding sliver etc. and to open and clean fibers for testing.
Conclusion:
It is concluded that there is 91.86% 0f lint and 7.3% of trash and cage loss is 0.84%
Informative
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