Lab 3

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University of Delaware *

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215

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Material Science

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Dec 6, 2023

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docx

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Textile Wicking Test Objectives: 1. To understand wicking characteristics of textile fabrics. 2. To grasp basic testing data analysis skills: mean, standard deviation and t-test
Wicking Test What is the definition of wicking? The ability of a fiber to transfer moisture along its surface What impact would wicking property of textile fabric have on product performance and appropriateness for specific end uses? The impact would be how fibers with good wicking characteristics can produce comfortable products because the moisture is pulled away from the skin by wicking to the outer surface of the fabric where evaporation can occur. Please calculate the mean and standard deviation of 3.5, 4.2, and 4.8. 0.65 Assume you conduct wicking test of two fabric samples. You have three replications for each sample. For sample 1, the results you obtain are: 4.3cm, 4.6cm, and 4.9cm. For sample 2, the results you obtain are: 4.9cm, 4.6cm, and 5.2cm. Please calculate the means and standard deviations of the wicking results of the two samples. Please conduct two-sample t-test (assuming equal variances of the two samples) to test the following hypothesis and compare wicking results. What is the p-value? Do you reject or not reject null hypothesis (use significant level 0.05). What is your finding? Null hypothesis (H0): there is no significant difference in wicking property between these two fabrics. µ 1 = µ 2 Alternative hypothesis (H1): there is significant difference in wicking property between these two fabrics. µ 1 ≠ µ 2 Wicking Test 1 (cm) Wicking Test 2 (cm) Wicking Test 3 (cm) Mean (cm) Standard Deviation Fabric 1 4.3 4.6 4.9 4.6 0.3 Fabric 2 4.9 4.6 5.2 4.9 0.3 p-value = 0.287864135 Note: Since the alternative hypothesis is µ 1 ≠ µ 2 , you should use two-tail p-value Reject or Not Reject null hypothesis. (Please circle one. Note: you should reject null hypothesis if p < .05) Finding: The purpose of this test is to observe the speed that water moves in a fabric. Because wicking is used for moisture management, understanding the speed and distance of moisture is important to fabric performance, especially for high performance textiles used in athletic apparel.
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