On the basis of models developed and experimental studies, the impact of a compression garment on average and local changes in unit pressure was analysed. The study was based on the analysis of the results of 3D scans of selected parts of female and male bodies. It was found out that surface pressure exerted by the compression garment leads to some changes in the geometry of body circumferences and in their lengths and, consequently, to a change in the average pressure value, as well as local changes along the circumference. The main purpose of this work was to estimate the size of these changes in the example of selected parts of female and male bodies.
The density of urea (U) in the mixtures of N,N-dimethylformamide (DMF) and water (H 2 O) was measured within the temperature range of (293.15 to 308.15) K. The results obtained were used to calculate the excess molar volume, V E , of the DMF−H 2 O mixture, apparent molar volumes, V Φ , of DMF in water and of water in DMF, as well as the partial molar volume of urea in a solution at infinite dilution, V m ∞ , within the whole concentration range of the mixed solvent (DMF−H 2 O). The data obtained were discussed from the point of view of temperature changes and interaction in solution.
One of the most important stages in the design process of compression products is describing
the relationship between the force and elongation of the knitted fabric, using appropriate
and scientifically justified force values in the fabric undergoing a stretching and relaxation
test, in the form of a hysteresis loop. Research on this issue was carried out on two variants
of knitted fabrics with elastomeric threads – a warp and a weft – knitted one. Based on
the functions of the relation between the force and relative elongation determined and on
Laplace’s law, compression bands with intended values of unit pressure were designed and
manufactured and then subjected to experimental verification. In addition, a procedure was
presented for dividing compression fabrics into specific compression classes.
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