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Referring to the comparison of the structural features in various types of yarn , it can be seen that, based on the fiber geometric properties and inherent characteristics of the processing systems, staple yarns have substantial fiber density, short fiber segment lengths between points of entanglement, and minimal mobility of the fiber segments . This is the basis for the retention of the intrinsic fiber contiguity and thus the excellent dimensional stability of staple yarn structures under low levels of stress. All yarns, except stretch or elastomeric, tend to have excellent dimensional stability when loaded in the direction of the yarn axis. However, staple yarns also have good dimensional stability when loaded or deformed cross-sectionally or normal to the yarn axis This means that spun yarns retain their natural bulkiness, good covering power, and excellent hand under various extensional, compressional, and bending deformations to a much greater extent than would be expect...

i)Volumetric density, ii) fibersegment length   between points of entanglement, and iii) mobility of the fiber segments between points entanglement. These three structural features and the variety of yarns are necessary to understand the basis for differences in yarn performance.Volumetric density in yarn is dependent on fiber compactness, the packing density of fiber or filament in the cross section of the yarn in a relaxed state. A great deal of air or empty spaces is contained in all yarns, but staple and textured filaments yarn tends to contain most. A yarn can be considered dimensionally stable if the fiber packing density is approximately the same in the relaxed state and low level of stress. The variation of packing density is also important in relation to aesthetics and yarn quality. The average fiber segment length between points of entanglement within a yarn structure is sometimes referred as fiber modulus length. In most yarn structures in which twist is the basi...

Continuous filament of yarn structure In a steel or in a rope structure, one strand or component remains in the centre, and all other components have a specific and constant radius of spirality (Helix), remaining in an annular envelope about the center or cable axis. In examining a segment of the cable, one would find the longest components at the surface and the shortest component in the centre. This is possible because each component is individually controlled by tension or rate of feeding during formation of the cable or rope. During the twisting of multi continuous filaments, however, there exists no control of the tension or rate of feeding of the individual filaments resulting a self-equalization tension phenomenon wherein the individual filaments exchange positions radially among the various annular zones in the assemblage. Those filaments going to the outer layers of the yarn develop more tension and, being tight, force themselves to the center of the yarn to relieve th...

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What is reclamation maintenance | scheduling | planning maintenance | how to make plan It is the design of new equipment. Weaknesses of current machines are sufficiently studied. When it is observed that the maintenance of machinery is more expensive and complex then buying a new one, then the old capital machinery or spare-parts must be repaired or replace by a new one. The relative break down maintenance is emergency unexpected breakdowns of machines or equipment. These are unpredictable or reactive types of maintenance and are more difficult to schedule than the above three categories. Maintenance planning All maintenance must be well planned and according to production schedule, also planning should be done in such a way that the production not hampered by any means. It is one of the most essential programs of a modern maintenance system which is integral with scheduling. How to make scheduling Scheduling of maintenance requires concurrence of production personnel to re...