17—an Instrument for the Measurement of the Forces Operating Between Fibres During Drafting

Martindale, J. G.

doi:10.1080/19447024708659303

Cited by 44 publications

(21 citation statements)

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“…Martindale [ 4 ] first set up an apparatus for measuring the drafting force of cotton slivers, and studied the influence of drafting ratio, roller gauge, fiber weight, twist multiplier, spinning procedure, and fiber orientation. Later, others showed that at first, the drafting force increases as the draft increases and then quickly declines [ 6,7 ] .…”

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Drafting Force of Fine Denier Polyester Fibers

Lee

1998

Textile Research Journal

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In this paper, we use fine denier polyester fibers (0.8 denier) as the test material to measure drafting force in the break draft zone. The fundamental relationships between drafting conditions (such as drafting ratio, roller gauge, twist multiplier, and fiber mass) and drafting force follow the same trend as for cotton fibers. However, the drafting force curves reveal some differences between them. The character of the former reveals

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confidence: 99%

Drafting Force of Fine Denier Polyester Fibers

Lee

1998

Textile Research Journal

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“…The drafting force has been measured for cotton and rayon. [13][14][15] The results show that frictional force is affected by different drawing process parameters such as draft, input sliver count, sliver compactness, sliver direction, distance between the drafting cylinders, roller speed and fiber length. More precise results were obtained by using the device of Martindale with the help of a force sensor.…”

Section: Volume 7 Issue 2 -2012mentioning

confidence: 99%

The Effect of the Sliver Fiber Configuration on the Cotton Inter-fiber Frictional Forces

Ahmad

Sinoimeri

Nowrouzieh³

2012

Journal of Engineered Fibers and Fabrics

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Fiber surface properties have a significant effect on yarn spinning. The frictional behavior of fibers greatly influences their processing, their performance and the performance of the final product. In order to investigate the effect of fiber surface properties and inter-fiber friction during spinning process, card slivers are taken and subjected to three drawing passages. Card and drawing frame slivers are then tested by the Static Friction Tester (SFT), which has been developed earlier. Fiber fineness, maturity and fiber length are measured by using different testing instruments. Hook content is calculated by utilizing fiber length data. The statistical analysis of results shows the same trend for the different cotton fibers tested.

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“…Workers in this field are Martindale [47], Townend and Chow [74], and Cox and Ingham [15]. Martindale [50] made a detailed investigation of the force required to draft a sliver. His paper describes the instrument in detail and gives data.…”

Section: Effect Of Textile Processes On Uniformitymentioning

confidence: 99%

Irregularity in Textile Yarns and Strands

Sanborn

1954

Textile Research Journal

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AN INVESTIGATION into the measurement and causes of irregularities in textile strands formed the basis for this literature survey. Because emphasis was placed on the effect of textile processes on uniformity, the section covering the interpretation of uniformity measurements is quite detailed and the section describing measuring instruments is necessarily rather sketchy. For essentially the same reason, attention was given to the measurement of fiber parallelization, since this quantity has a very important effect on the uniformity of the strand after processing. Measurement of Strand UniformityThe problem of mathematically assessing the uniformity of textile strands involves the development of a means for measuring the linear variations of a strand property such as weight or diameter and also a method for interpreting the measurements once they have been made. This section is comprised of two parts, the first being a discussion of methods of measurement and the second being various workers' concepts on interpretation. Merxsuyement of Strand PropertiesThe archaic method of analyzing the uniformity of textile strands involves making a large number of measurements and tabulating data for further computation. One could measure a property such as diameter under the microscope, or, as Balls ~6d id, use an air-flow instrument, in which a yarn partially obstructs an orifice through which air is flowing, the air pressure being considered an index of yarn area. Another, older method is to cut strands to the same length, and weigh the pieces. Martindale ~48~ described an aid for doing this which uses a yarn skein reel with a clamp on one arm so that a skein may be cut into several long and several short pieces.Martindale [49~ indicated one source of error connected with measurements made at definite intervals. If the strand has periodic variations and the period of measurement is related to the fundamental period of variation, then the measurements will be in error.In order to speed up measurements, testers which produce a continuous record of a strand property were developed. The earliest type was the SacoLowell [82] tongue-and-groove compression tester.It has been used a great deal in its original form (see, e.g., [43]) both in research work and in mills. It was modified by Rusca [65], who made the pen arm brush over electrical contacts, thus producing signals which actuate counters; and also by Germans [z8] and Vose and Plummer [80], who constructed the integrators described below. Several British authors described similar instruments, in-

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17—an Instrument for the Measurement of the Forces Operating Between Fibres During Drafting

Cited by 44 publications

References 0 publications

Drafting Force of Fine Denier Polyester Fibers

Drafting Force of Fine Denier Polyester Fibers

The Effect of the Sliver Fiber Configuration on the Cotton Inter-fiber Frictional Forces

Irregularity in Textile Yarns and Strands

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