Lab 4

pdf

School

North Carolina State University *

*We aren’t endorsed by this school

Course

252

Subject

Mechanical Engineering

Date

Dec 6, 2023

Type

pdf

Pages

Uploaded by ChancellorReindeer1478

TT252: FORMATION AND STRUCTURE OF TEXTILE FABRICS LAB 4: WOVEN FABRIC ANALYSIS I (100 points) Due Date: M\_‘fi& Student Name TYNINE Scenio: Instructor: Date Submitted: Section: TT252L-20 Woven Fabric Analysis Procedure 1. Identify the fabric face and warp direction. FAoIC Cac =dark side, WAYP=be, L\wvg=wwite 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: SRR Sample Length: m Jom —0. 09w San}?i\e‘%dm:(?@@ 4,00m —=0.04DvK 4. Weigh the sample and record the results, in grams: Sample Weight: | , 55 J 5. From the sample dimensions and weight, calcufiate 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. ) 1.259 - 492 . 2 Bas\s “t(g“ni) = 0'05;‘0'040 4'&] 3‘%1 (W - 744 9924 4/ linear pn e wE(2m) = 44342 X162 = 1429901 3R 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 AT CI"] 15 i |

A Determine warp and filling yarn types (spun or continuous filament) and check the appropriate box in the data sheet. Determine warp and filling yarn numbers in the tex 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. Observation | Straight Warp Length (cm) | Straight Filling Length (cm) L o .10 5.20 2 | 1.0 5.10 | B s, | 7.00 5.20 [ 4 | 1.0 5.20 | S i} .10 5. 20 ( 6 | 1.20 5.0 | ) .10 5.39 [ Buinak | .50 G .20 [ 9 | 1.10 5. 20 10 | 1: 10 5.%0 Average | 72 5.22 Total | TP 1.0 57572 b. Weigh each bundle of 10 yarns, in grams, and record below: Weight of Warp Yarns=(.07171 9 / Weight of Filling Yarns=(Q. 6’2_3 ¢. From the total length and weight, calculate the yarn number in the tex system. Show the calculations here and record the results in the data sheet. naxe weet \jo\mauu\{ 0.211 fﬂ;) X\000 nmvn#(%&) > (S Oei) 1000 0.572 o), e 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.

/ .NC\(‘) u’\“\v / = :L%::(_Gl X \OO D QTR HA R 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. N % s e RPN gy w7 :—ltrb”"‘ - Allngy ey /’%ﬂ {‘T\k}r\o wp /. = 24.C\|2~/.‘I 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. WAYP Wt per m? of fpac(@im*) = W =310.70\ 000 "1 . Bllingy Wk pex w oF £abric (gm)= L2AX 190 R adeiaE s 174 .&3@—/ [coc W)= P00V +179. 3% = 490. 635 4wm* 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%. (Cariard) BasisS W (4 Evvorl. = 492 47 -490.535 49342 [ Envr /. =0.0050X100 / oed Ewory. 06‘0 \/&(\‘j J 14. Using a pick glass, draw th e pomt-paper provided on the 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.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

DATA SHEET Fabric Type: V¢\VWWA Fabric Basis Weight: 40 4, (g/m?) Fabric Weight/Linear Meter; 744. in. m.) assuming fabric width of 132 em Warp Density: . (ends/cm) Pick Density: |\0.l¢ (picks/cm) Warp Yam Type: Spun [X] CF. . Filing Yarn Type: Spun ] CF. [] Warp Yarn Count: {09.\40 (tex) Filling Yarn Count: A ,\q\ (tex) Warp Yarn Twist: Single [<] Ply O Warp Yarn Twist Direction: S[ ] Z [X] Filling Yarn: single [ Ply [] Filling Yarn Twist Direction: S[ ]z [ ) Warp Yam Crimp: 24\ 2(%) Filling Yarn Crimp: B 75(%) / Sructual Fabric Desig: 0%\ ZH T ( (’/Sﬂ) [ Weave Repeat Size: (4 _ends x_4 picks)/