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The fourth edition of this monograph published in 1999 was well received and more than 2000 copies were sold in a span of less than 5 years. In the present edition, taking into consideration the high speed range of the preparatory & spinning machines that are in position in modern mills, the schedule for some of the maintenance activities have been revised. In addition, some new maintenance operations viz. servicing of scanning roller in auto leveller draw frames, false twister changing in speed frames, splicing unit monitoring in auto coners etc. are proposed Thorough revision has been made on the lubricating schedules of different production machineries.
The intention of SITRA to a bring a book especially in Tamil on the energy management subject is to cater to the technical needs of all floor level technical personnel working in modern industries. Though the ways and means of taking suitable conservation measures towards energy conservation as well as energy management is well known, for successful implementation, we need the help and cooperation of technical staff including the floor level technical personnel. All personnel should be aware of the need for energy conservation and knowledgeable enough to tackle the day to day issues with respect to energy management.
Section I: Quality and Waste
About one-fifth of the 181 tables in this section are newly added, with another two fifths having been revised. Important additions include the following:
¯ Guideline values of moisture, ash and cellulose content in Bt cottons
¯ Prediction expressions for cotton yarn elongation, cotton yarn hairiness and extra sensitive neps
¯ Norms for normal imperfections, extra sensitive imperfections and classimat faults- cone yarns
¯ Norms for yarn hairiness – both cop yarn and cone yarn
¯ Guideline values for devation rate and weak spots in cotton yarns
¯ Norms for quality of compact yarns
¯ Norms for properties of polyester, acrylic, P/C and P/V yarns
The subject matter of this book has been divided into Nine chapters. The methodology to be adopted and process parameters to be maintained for manufacturing core yarns, melange yarns and fancy yarns are discussed in the first three chapters.
Production of worsted type yarns in cotton spinning system is gaining popularity with a view to reduce manufacturing cost. Similarly, manufacture of “Siro” yarns in modified cotton spinning system is also being attempted towards value addition. These two subjects are covered in the fourth and fifth chapters.
Compact spinning and composite spinning are two new spinning systems that are being extensively researched in developed countries for quality improvement in plain and core yarn configurations. Chapter six briefly deals with these two yarns.
The importance of quality assurance has remained equal if not increased till date despite the overall improvement in the quality of yarns and fabrics which has taken place over the years. To control the quality of the products one need to assess them objectively.
The book “Textile Testing – Fibre, Yarn and Fabric” was published in 2001 to cater the need of textile industry towards quality assurance. Though the title says ‘Testing’ the book contain information on the influence of various raw material and process parameters on quality of products such as yarns and fabrics, how to control the same and interpretation of test data based on SITRA’s rich experience.