Torque-Balanced Singles Knitting Yarns Spun by Unconventional Systems. Part 1: Cotton Rotor Spun Yarn.

Research on the manufacture of torque balanced singles knitting yarns spun on conventional systems focused on the development and application of a yarn modification process used in rotor spinning cotton yarn. Experiments measured and compared the properties and performance of both parent and modified yarns, including yarn tensile propetie..

Estimation of Spinning Tension from the Characteristic Smallest Value of Yarn Strength

The characteristics smallest value (CSV) of a yarn sample is the value for which there is only one smaller value in the sample. The CSV of yarn strength equals the minimum strength of the yarn. Therefore, the minimum tension during spinning approximately equals the CSV of the yarn strength. Maximum yarn tension is normally twice the minim..

Spinnability of Gara-bo' Spun Silk Yarn.

Researchers examined the Gara-bo silk yarn spinning machine to investigate the possibility of producing yarns with additional desirable properties. Results indicated that the stuffer tube affects the optimal values for total weight of fibers and length of fibers, and the fiber length of raw materials is a critical factor that affects the ..

Short Staple Spinning Technologies.

Italian cotton yarn spinning machinery manufacturers aim to acheive zero defect operations. Bale opening machines pluck very small tufts of material from up to 40 bales to create a good blend of fibers. Automixing machines are available with four cells, s

Spinners Respond to Fashion for Multi-Coloured Flecks.

J.C. Renni ＆ Company introduced its two ply 14.5 Nm yarn Esprit, suitable for 7 and 9 gage knitting machines, to meet the demand for soft and supple knitwear, Esprit is available in a 64/36 lamb's wool/cotton blend and an all cotton boucle. Rennie's donegal yarns incorporate a silk nep to produce the fashionable fleck effect. Its Superso..

Cost Reduction in Spinning Mills.

Spinning mills can take several measures to reduce production costs. Raw materials form 50-65 percent of the cost of the finished 70-88 percent. Mills should calculate yarn realization rates every month. Spindle utilization rates should reach 96 percent. A 1 percent increase in spindle utilization decreases costs 18 rupees per spindle per..

Wrap Spinning: Principles and Methods -- A Review.

The different techniques of forming wrapped yarns include the manufacture of Selfil yarns in which two continuous filaments are wrapped around a staple fiber core on a modifed Repco self twisting machine: Repco wrapped yarns consist of a strand of staple

A contribution to the technology of lubricants. XXVII (Spanish)

This instalment of the book devoted to the lubricants used in spinning deals with the tribological diagram - the diagram of the product and the diagram of the process; the formulation of lubricants - lubricants based on mineral oil, lubricants based on an alkylbenzene, lubricants with naphthene sulphonates, lubricants with sulphonated wha..

Solutions to problems in spinning practice. XI. Increasing neglect of maintenance and failure to service older spinning plants (German)

In numerous firms older spinning plant is no longer properly maintained, which is not a good state of affaris under current conditions. Frequently it is the cost factor or merely inertia and carelessness which are responsible. Sometime cleaning is not carried out because the responsible operatives are overloaded. Plans for maintaining, lu..

Energy-saving potential in the spinning mill (German)

Ways in which energy can be saved in the spinning mill are outlined. Two cases are discussed: a ring spinning mill in India producing combed yarns and a rotor spinning mill in an industrial country producing carded yarns. The production costs are split up into wage, energy, capital and material costs and costs to cover depreciation. In ri..