Presentation on theme: "GHCL BASIC KNOWLEDGE OF TESTING IN TEXTILES. Ever wondered what differentiates two seemingly same products from each other??"— Presentation transcript:
GHCL BASIC KNOWLEDGE OF TESTING IN TEXTILES
Ever wondered what differentiates two seemingly same products from each other??
Fabric testing is an important segment of the textile industry. We can easily detect the faults of machinery and materials during test of textiles.
WHY DO WE NEED TESTING?? 1.Checking Raw Materials – Variable Qualities 2.Monitoring Production - to control increase of waste. 3.Assessing the Final Product – Enhance and efficient output. 4.Investigation of Faulty Material – To get the root cause of problems during process. 5.Product Development and Research
Following are some of the source of standard test method for textiles: American Society for Testing and Materials (ASTM) American Association of Textile Chemists and Colourists (AATCC) International Standard Organization (ISO) Bureau of Indian Standards (BIS) TESTING IS NORMALLY CARRIED OUT ACCORDING TO A “STANDARD ”
There are 3 forms of Textiles on which the test can be conducted - Fibre- length, strength, fineness, maturity. Yarn- strength, count, twist Fabric- Greige / Dyed EPI, PPI, GSM, Physical and chemical properties. WHAT IS TO BE TESTED???
FIBER TESTS 1. Identification of fiber - By their cross section Or Chemical test 2. Fiber length* - to identify quality of cotton. 3. Strength and elongation - tensile properties 4. Fineness & Maturity test - 5. Uniformity & Evenness - 6. Trash, neps test etc. - Impurities
YARN TEST 1. Yarn count – e.g. 30s single or 2-ply yarn 2. Twist per unit length 3. Strength and elongation i.e. tensile properties 4. Appearance 5. Evenness and regularity 6. Hairiness * - Due to Short Fibers
FABRIC TEST Physical Properties of Textiles - 1. Strength and elongation - Tensile, Tear & Bursting 2. Thread Count 3. The count of yarn used 4. Fabric Weight - GSM 5. Design and construction of the Fabric 6. Air permeability
7. Flammability Test 8. Stiffness, handle, drape 9. Crease resistance and recovery 10. Abrasion 11. Pilling * 12. Shrinkage *- Dimensional stability 13. Water absorbency or resistance etc. 14. Seam Strength & Slippage*
FABRIC TEST Test in chemical properties of textile 1.Color Fastness to Washing 2.Color Fastness to Crocking ( Rubbing) – Dry Crocking – Wet Crocking 3.Color Fastness to Water 4.Color Fastness to Light 5.Fiber Composition 6.Color Fastness to Perspiration 7.Color Fastness to Dry Cleaning 8PH Value 9Durability Test ( DP Rating)
Acetate Cotton Nylon Polyester Acrylic Wool Multifiber Fabric - Specially Used for testing of textile performance on different fibers. Observation - Color Change - Color Staining
GRAYSCALE Grayscale for color change is used to visually evaluate change in color due to color Fastness Test. Gray Scale for staining is used to visually evaluate the staining on multifiber samples due to colorfastness test. Rating 1 to 5 can be measure on the scale where rating 1 is poor and rating 5 is excellent performance. Generally rating 4 is acceptable.
TIPS TO REMEMBER Read the label properly: Size, Where it is made, Style number, Type of fabric, RN Number Read the Hang Tag: fabric characteristics, and describes the quality. Warnings Are Sometimes Included: Possible shrinkage, stretching, or fading Care Instructions