By B. Purushothama
The e-book presents an creation to caliber administration and the standard targets of goods. Chapters talk about the impression of yarn parameters from a customer’s standpoint, purposes for bad caliber, a number of effective points and difficulties concerning spinning. The explanations of yarn defects and acceptable treatments also are tested. a few of the common-market court cases that spinners event are mentioned and the activities to be taken are defined.
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Extra info for A Practical Guide to Quality Management in Spinning (Woodhead Publishing India)
Winding quality: Uneven winding results in uneven tension in knitting, giving rise to uneven tightness factor and horizontal lines and barre effect. If the cones have stitches in the back, it results in breakages. The front stitches leads to loose ends, but is not critical as it can be controlled by the tensioning device at knitting. Consistency in cotton shade and Micronnaire: Day to day variations in cotton shades and Micronnaire values between mixings in the same lot of yarns results in uneven dyeing, streakiness and barre.
Winding quality: Unwinding should be easy at warping and on looms. If the warping is done at slow speeds, the problems shall be less. Friction value: In case of dyed yarns, the finishing should be done to give a lubrication effect for the yarns to run on looms. Then yarns need not be waxed as it is done for knitting yarns. Absorbency: Absorbency is a very important criterion for the yarns for towels. Consistency in shades: When dyed yarns are being used consistency in shade becomes very critical.
Coarser the fibre, higher the end breakage rate in spinning. Uster thin place (30%) in the yarn vary depending upon the fibre micronaire. Lower the micronaire lower the thin places and vice versa. Raw materials if not suitable for the product being produced cannot give the quality parameters as needed. We need to understand the quality objectives of the product and decide the raw materials. The factors like feel of the fabric, hairiness in the surface of fabric, strength of the yarn and the fabric and dyeability are governed by the raw material properties.
A Practical Guide to Quality Management in Spinning (Woodhead Publishing India) by B. Purushothama