Comparison of methods for measurement of the pressure exerted by knitted fabrics

Cieślak, Małgorzata; Karaszewska, Agnieszka; Gromadzińska, Ewa; Jasińska, Izabela; Kamińska, Irena

doi:10.1177/0040517516665255

Cited by 16 publications

(9 citation statements)

References 26 publications

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“…Then, Young’s modulus E is defined as the ratio of engineering stress to engineering strain. 9,50–54 So we can write where σ E is the engineering stress (N/mm 2 ), ɛE is the engineering strain and E E is the modulus of elasticity (N/mm 2 ).…”

Section: Derivation Of Mathematical Modelmentioning

confidence: 99%

New approach for the prediction of compression pressure using the cut strip method

Siddique

Mazari

Havelka

et al. 2020

Textile Research Journal

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The main objective of the current research is the development of a new mathematical model for the prediction of compression pressure based on the incorporation of some new parameters. These new parameters include deformed width (wf), true stress ([Formula: see text]), true/logarithm strain ([Formula: see text]), true modulus of elasticity ([Formula: see text]), along with measurement of engineering stress ([Formula: see text]), engineering strain ([Formula: see text]) and engineering modulus of elasticity ([Formula: see text]) at ankle position. Various brands of compression socks comprising similar fibrous combinations, as well as knit type, were purchased. Initially they were hand washed, put on the leg for marking, marked in a square, sliced, and cut into rectangular strips. The rectangular cut strips were evaluated for force–elongation characterization at different strain values considering the requisite practical elongation values (circumferential difference between leg and sock at ankle portion). For pressure measurement, a Salzmann MST MK IV pressure measuring device using a standard-sized wooden leg (circumference = 240 mm) was used. For tensile evaluation, a Testometric tensile tester was used. In this research we developed the two mathematical models based on true Young’s modulus and engineering Young’s modulus were compared with Hooke’s law and Laplace’s law. The developed models were also compared with previously existing models statistically.

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Section: Derivation Of Mathematical Modelmentioning

confidence: 99%

New approach for the prediction of compression pressure using the cut strip method

Siddique

Mazari

Havelka

et al. 2020

Textile Research Journal

View full text Add to dashboard Cite

show abstract

“…Cieślak et al analyzed the impacts of pressure measurement methods along with two types of knitting structures, i.e., warp knitting and weft knitting, on the compression values using the same materials and concluded that that pressure values were lower in the warp-knitted fabric as compared to the single-jersey weft-knitted fabric in both vivo and vitro tests [ 16 ]. Troynikov et al studied the effects of the physical attributes of warp-knitted tricot and single-jersey weft-knitted products on compression values.…”

Section: Introductionmentioning

confidence: 99%

Exploration of Effects of Graduated Compression Stocking Structures on Performance Properties Using Principal Component Analysis: A Promising Method for Simultaneous Optimization of Properties

et al. 2022

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This paper focuses on the comfort properties of graduated and preventive compression stockings for people who work long hours in standing postures and for athletes for proper blood circulation. The present study was conducted in order to investigate the effects of the yarn insertion density and inlaid stitches on the performance of the compression stockings. The effects of these parameters on the thermo-physiological comfort properties were tested with standard and developed methods of testing. All compression stockings were maintained with class 1 pressure as per German standards. The structural parameters of the knitted fabric structures were investigated. The stretching and recovery properties were also investigated to determine the performance properties. The theoretical pressure was predicated using the Laplace’s law by testing the stockings’ tensile properties. The compression interface pressures of all stockings were also investigated using a medical stocking tester (MST) from Salzmann AG, St. Gallen, Switzerland. Correlation between the theoretical pressures and pressures measured using the MST system were also assessed. The current research used a multi-response optimization technique, i.e., principal component analysis (PCA), to identify the best structure based on the optimalization of the above-mentioned properties. The results also revealed that samples with higher insertion density levels exhibit better comfort properties. The results showed that sample R1 was the best sample, followed by R2 and P. In addition, all developed stocking samples exhibited better comfort properties than the control sample from the market.

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“…Many research works are focused on orthopaedic supports and analysis of their construction, structure, properties, and behaviour during wearing [7][8][9][10][11][12][13]. Stretchable knitted structures are used for compression garments that contain elastomeric yarns and gain appropriate compression [7].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Electro-Conductive Compression Knits Wearing Conditions on Heating Characteristics

2021

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Textile-based heaters have opened new opportunities for next-generation smart heating devices. This experiment presents electrically conductive textiles for heat generation in orthopaedic compression supports. The main goal was to investigate the influence of frequent washing and stretching on heat generation durability of constructed compression knitted structures. The silver coated polyamide yarns were used to knit a half-Milano rib structure containing elastomeric inlay-yarn. Dimensional stability of the knitted fabric and morphological changes of the silver coated electro-conductive yarns were investigated during every wash cycle. The results revealed that temperature becomes stable within two minutes for all investigated fabrics. The heat generation was found to be dependent on the stretching, mostly due to the changing surface area; and it should be considered during the development of heated compression knits. Washing negatively influences the heat-generating capacity on the fabric due to the surface damage caused by the mechanical and chemical interaction during washing. The higher number of silver-coated filaments in the electro-conductive yarn and the knitted structure, protecting the electro-conductive yarn from mechanical abrasion, may ensure higher durability of heating characteristics.

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Comparison of methods for measurement of the pressure exerted by knitted fabrics

Cited by 16 publications

References 26 publications

New approach for the prediction of compression pressure using the cut strip method

New approach for the prediction of compression pressure using the cut strip method

Exploration of Effects of Graduated Compression Stocking Structures on Performance Properties Using Principal Component Analysis: A Promising Method for Simultaneous Optimization of Properties

The Influence of Electro-Conductive Compression Knits Wearing Conditions on Heating Characteristics

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