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TXL470 Textile Testing

TXL470 Textile Testing. Suzaini Binti Abdul Ghani Textile Technology Programme Faculty of Applied Sciences Room no. : HC4061 03-5543 7859 010-226 3462. It is your own choice>>>>>>>>>>. Recommendations for Success! Doa and work hard

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TXL470 Textile Testing

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  1. TXL470 Textile Testing SuzainiBinti Abdul Ghani Textile Technology Programme Faculty of Applied Sciences Room no. : HC4061 03-5543 7859 010-226 3462

  2. It is your own choice>>>>>>>>>> Recommendations for Success! Doa and work hard 1. Attend all classes. 2. Take good class notes. 3.Pay attention to detail. 4.Write down examples shown in class. That is why you have to attend all classes. Enjoy the class. What you learn will be useful in many different aspects of your life. It is more than just Textile Testing course

  3. COURSE OUTCOME 1. State and discuss the terms of textile testing and quality control, condition of testing and sampling of fibres, yarns and fabrics. 2. Identify, discuss and operate the equipment for testing of fibres, yarns and fabrics. 3. Discuss, plan and conduct testing and evaluation of fibres, yarns and fabrics.

  4. Continuation from previous page 4. Analyze and evaluate quality of fibres, yarns and fabrics, related to quality measures in production. 5. Discuss results of testing fibres, yarns and fabrics for specific end-uses. 6. In writing, discuss and report results of fibres, yarns and fabrics testing Course outcome

  5. A:Three tests 40-50%1.Intro and fibres2. Yarns3. Fabrics4. Final testB: Individual and group assignments Class activities 20-30%C: Lab reports 30% EVALUATION

  6. Definition of QUALITYJuran Handbook of Quality • Quality consists of those product features which meet the needs of the CUSTOMERS and thereby provide PRODUCTS satisfaction • Quality consists of freedomfrom defects

  7. 1. Goods: Physically available 2. Software: Instruction programs for computers 3. Services: Work performed for someone else PRODUCT: output of any process

  8. CUSTOMERS 1.External 2.Internal 3.Users

  9. CUSTOMERS NEEDS: Product satisfaction (according to grade) Conformance to specification / requirement

  10. Definition of QUALITYANSI/ASQC Standard A3-1987 “The totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs”

  11. Expensive : Lab set up (furnished and testing equipment) Operative cost (operator salaries, computer, training) Nonproductive: Add up to final cost of production Textile Testing laboratory and procedures

  12. 2. Monitoring production • Testing samples from the production line: Quality Control • Maintain specific properties of the product by 1. Carry out test 2. Appropriate sampling techniques 3. Statistical analysis (analysis of the results)

  13. 3. Evaluation of the end product • Output from the bulk production is examined before delivering products to the customers • Takes place after the materials have been produced • Example: Yarn inspection, Fabric inspection, Garment inspection

  14. 4. Investigation of faulty material • Faulty: 1. Final inspection 2. Customer complaints Important to know the causes in order to eliminate faulty production in future To know which section is responsible for the faulty/problems (Example: supplier or makers)

  15. 5. Product developments and research • Technology is changing • Modified materials • Different method of production in order to produce new products • Improve quality of products or • Lower the cost of production New methods/materials/products need to be tested before marketing

  16. Fabric Quality Control Inspection

  17. Standardization of testing • From the testing • The performance of the product • Meet the specification or not??? The test should be REPRODUCED even though different laboratory/operators handling the test. Result should be in certain range “Statistical Criteria”

  18. Variations of results due to: 1. MATERIALS Variable properties, example: Cotton fiber 2. TEST METHOD i. Human influence : -test procedure -mounting of specimen -precision in the adjustment of the instrument -results interpretation ii. Condition of the materials: -size -packaging iii. Temperature and humidity condition iv. Type and condition of the testing equipments

  19. Minimize variation of results by using set of standard • Malaysian Standard (MS) • British Standard (BS) • International Standard Organization (ISO) • American Standard Testing Material (ASTM) • American Association of Textile Colorist and Chemist (AATCC)

  20. STANDARD • Reference number: D3776-96 (Example) • Scope of test • Referenced documents • Summary of test method • Apparatus • Conditioning • Details on test method • Report • Precision and bias • Appendix for reference • Keywords Class activity 1

  21. Temperature (Degree C)Relative Humidity (%) 20 65 + 2 23 50 + 2 27 65 + 2 TEXTILE TESTING CONDITION

  22. Relative Humidity • The amount of water vapor in the air (at a specific temperature) compared to the maximum amount of water vapor air could hold at that temperature, and is given as a percentage value. • Relative humidity depends on the temperature of the air, as warm air can hold more moisture than cold air.

  23. SAMPLING TECHNIQUESDue to:-1.time and cost constraint , 2.destructive test • Factors to consider: • The form of material • Amount of sample available • Nature of the test • Type of testing equipment • Information required • Degree of accuracy required

  24. RANDOM SAMPLE BIASED SAMPLE • Every individual in the population has an equal chance of being included • True representation: equal chance of being represented - Selection of an individual is influenced by factors other than chance Factors: Physical characteristic Example: Fibre length Random vs biased samples

  25. Terms used in sampling 1. Consignment: • Quantity of material delivered at the same time 2. Test lot or batch: • One defined type and quality, delivered to one customer 3. Laboratory sample: • Material used as a basis for carrying out the measurement in the lab. Derived by appropriate random sampling

  26. Terms used in sampling 4. Test specimen: • Material used for individual measurement derived from the laboratory sample 5. Container: • A shipping unit which may or may not contain package 6. Package: • Elementary units (which can be unwound) within each container in the consignment • Example: bobbin, cone, hanks(roving strand, yarn, sliver)

  27. Descriptive analysis used in textile testing • AVERAGE • MEAN • MEDIAN • STANDARD DEVIATION • CORRELATION COEFFICIENT Class Activity 2

  28. Definition: AVERAGE - Weighted center of the data MEDIAN - Middle value in the ordered data set STANDARD DEVIATION - Measure of variability CORRELATION COEFFICIENT -Strength and direction of linear relationship between X and Y

  29. Interpreting the correlation = R Perfect -1 Near to -1 0 Perfect +1 Near to +1

  30. Example: A set of data X = (1,3, 5, 7) A set of data Y = (2, 4, 6, 8) Calculate • Mean • Median • Standard Deviation • R

  31. STEPS for Standard Deviation • Find the average • Take each number and substract the average from it • Square each of the difference • Add up all the values in Steps 3 • Devide values form Step 3 with n-1 • Square roots value of Step 5 to get the standard deviation

  32. STEPS for Correlation • Find the mean of X and Y • Find the Sx and Sy • For each pair in the data set, take x minus Xaverage and Y minus Yaverage., and then multiply these difference together • Add all these product to get a sum • Divide the sum by Sx X Sy • Divide the result by n – 1, where n is the number of (x,y) pairs.

  33. Example1. Calculate the R between weight and drape coefficient2. Plot the graph and explain/discuss the relationship between weight and drape coefficient.

  34. QUIZ 1 22 March 2013 1. Defined and explained the term QUALITY. 2. Give one example of standard. What STANDARD tells you? 3. Calculate the regression value between abrasion cycle and fabric strength. Based on the value obtained, discuss the relationship between these two parameters.

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