To analyze the given Weft Rib fabric sample.
Apparatus : Beasley balance, crimp tester, fabric sample, picks glass etc.
THEORY:
Weft rib structure is the derivatives of plain weave. These are produced by entering the plain weave horizontally. In which two adjacent threads has interlacing with weft line in a one thread in the plain weave.
OBSERVATION TABLE:
| SR NO | EPI | PPI | WARP COUNT | WEFT COUNT | WARP CRIMP% | WEFT CRIMP % |
| 1 | 60 | 23 | 8.4394 | 9.52 | 15 | 8 |
| 2 | 59 | 22 | 8.50 | 9.52 | 13 | 9 |
| 3 | 60 | 23 | 8.30 | 9.49 | 16 | 8 |
| 4 | 58 | 23 | 8.43 | 9.52 | 14 | 10 |
| 5 | 59 | 24 | 8.43 | 9.53 | 16 | 7 |
| Mean | 60 | 23 | 8.43 | 9.52 | 14.8 | 8.4 |
Sample:
Calculation:
1.Warp count NE= 1.094*0.453/840*0.070
= 8.43 Ne
2.Weft count Ne=1.094*0.453/840*0.062
= 9.53Ne
3. Crimp %=Extended length-original length/original length*100
Warp crimp% =11.5-10/10 *100 =15%
Weft crimp%=10.8-10/10 *100 =8 %
4.GSM = (Weight of sample/25 *10,000
= 0.544/25 *10000
= 217.6 g/m²
5. Denting =EPI=60/2=30 = 30%
Result:
The following results are found from the above experiment.
EPI = 60
PPI = 23
Warp crimp% =148%
Weft crimp %= 8.4 1.
Warp count=8.4394 Ne
Weft count-=9.52 Ne
GSM=217.6
Denting – 2