Lab 5

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North Carolina State University *

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252

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Mechanical Engineering

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Dec 6, 2023

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TT252: FORMATION AND STRUCTURE OF TEXTILE FABRICS LAB 5: WOVEN FABRIC ANALYSIS 11 (100 points) Due Date: mm S5 o = |iqnt Instructor: Date Submitted: :):\u' Section: TT252L-20 Woven Fabric Analysis Procedure A ¢ L — wavy 1. Identify the fabric face and warp direction. ||‘}"‘ k grethiz na t 2. Square the sample by unraveling (using a pick needle) the warp and filling yarns from the sample’s four sides. Then use the scissors to cut the fringes from the four sides. 3. Measure the sample’s length and width accurately and record the results, in centimeters, below: Dar L freaw [Wary Sample Length: 5.3 cm— 0.09 B wa Sample Width: A e — 5,09 w 4. Weigh the sample and record the results, in grams: Sample Weight: 1.w0AQ J 5. From the sample dimensions and weight, calculate the fabric basis weight, in g/m’, and also per linear meter (152 cm. wide). Show the calculations here and record the results in the attached data sheet. 1-p6A 9 227 29 a/m Basis M(;xl\\\'):_———»—'“J“ = RN 2L Y e d G055 Mm% 9.0 2.7 \/qm:r ’iw‘«“], - 4 [ N a - 2.2 %5 & favvic W (B—n)= DD .24 2 6. Using a pick glass (magnifying glass), measure the warp and pick densities. Take the measurements at no less than five different locations within the sample. Record the results below. and calculate the averages. Record in the data sheet. Observation Warp Density, ends/cm. Pick Density, picks/cm. 1 7.0 10 2 2.0 \D 3 20 \ D 4 2 0 5 2.0 0 Average 20 d.%4 m-n-ﬂ

. Determine warp and filling yarn types (spun or continuous filament) and check the appropriate box in the data sheet. ligh‘} IH\W‘{) = Conhnvous darK/N“"l" =SPun . Determine warp and filling yarn numbers in the rex system as follows: a. Pull out two groups of yarns from the sample: ten ends from the warp and ten picks from the filling. Measure the straight length of each yarn in the two bundles and record this in the form below. Calculate the average length of the ends and the picks then record the total length of all 10 yarns within each group. dar\ X3 Observation Straight Warp Length (cm) Straight Filling Length (cm) | 1 5.6 Q.9 | 2 5.4 9.5 | 3 5.9 9.7 | 4 5.5 1o | 5 5.4 i 1115 | 6 5.5 9.3 & 7 5.5 9.9 i 8 5.9 9.9 | 9 5.9 10 ] 10 5 .5 10 ] Average 5.4 9.91 ] Total 54 9.1 J b. Weigh each bundle of 10 yarns, in grams, and record below: Weight of Warp Yarns = 0.0 444 Weight of Filling Yarns= 0,025 From the total length and weight, calculate the yarn number in the tex system. (5 Show the calculations here and record the results in the data sheet. (NW? 3] =00 1000 = {9 4 arn = (46x) = N = - Y 0.S4Bwm .41 4ox (Fvrey) ’ ’ 00929 _ L1060 = Blo. w0 Hex 3{;\\'\/\43 “’ﬂ) = W 9. Determine whether the yarns are single-strand or plied, and check the appropriate box in the data sheet. 10. Determine the yarns® twist direction (“S™ or “Z”) and mark the appropriate box in the data sheet.

11. From the sample dimensions (step 3) and the average straight lengths (8.a), calculate the warp and filling crimp. Show the calculations here and record the results in the data sheet. PRI s Ll k- NV -4 o gL e 2 5.3 S lingy Orimp. 22D\ om-Acm x\00= 97, AQewn 12. From warp and pick densities, yarn numbers and crimp, calculate the fabric weight and compare this to the basis weight (actual weight) recorded previously in the sheet. Then estimate the so-called % error by taking the weight difference and dividing it by the actual fabric weight. Show the calculations here. 320399, 4l WATP Wt per wt of fabvic (Slwﬂ-): M—l—m—"‘—“” gasis nt = viary wiwerht VoGO -~ » 2 ¢ 1 |%4X\001(\+%)X‘Ein.u‘%w L'V)“‘”" nwt=350.0d 29l JOARIWOANT" vgo ~—— — Basis wy = 104.906 + } 173,771 Filing w gev m of fabric (§lw?) = T } ll\)ar? wt per m> of €apvic = 173,777 g/m? 1 13. If the error exceeds 5%, explain the reasons behind the high level of error. Note: good analysis should result in an error of < 5%. /- Eveex = 231.32- 35849 :x\ou I iy The ) 35%.0H2 ervov | 1olidnt Measrt Tne. | e ; l /. E"":‘5.5]J . VATNS See ) v LW | MA Mmarhn 'wif wme neve Shiahtw o F i 14. Using a pick glass, draw the weave design on the poiiu-pap:l:r provided on lh‘c data sheet. Highlight one unit repeat of the weave structure. Record the repeat size in the area provided underneath the point paper. 15. Attach a fabric swatch, along with your 10 warp and filling yarns, in the areas provided on the data sheet. The swatch should be attached with the warp yarns parallel to the vertical direction.

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DATA SHEET Fabric Type: 9)\¢¢h WOVRN Ea1NC Fabric Basis Weight: 337.32(g/m’) Fabric Weight/Linear Meter:&5]7.7)3 (¢/lin. m.) assuming fabric widih of 132 cmt Warp Density: 20 (ends/cm) Pick Density: |4 (picks/cm) K7 Warp Yarn Type: Spun cF. [] Filling Yarn Type: Spun D C.F. Warp Yarn Count: 99,4100 (tex) Filling Yarn Count: (9. p4W(tex) Warp Yarn Twist: Single [X] Ply [] Warp Yarn Twist Direction: S|z [ Filling Yarn: Single Ply [] Filling Yarn Twist Direction: $[_] 2 [] no +wist Warp Yarn Crimp: 2 ,340(%) Filling Yarn Crimp: q (%) Structural Fabric Design: Weave Repeat Size: ( D ends x o) picks) SRR