The article presents the results of a study work on the assessment of selected structural and performance characteristics of weft knitted fabrics, produced from the commercial multifilament polylactide yarn PLA 6201D. The work was carried out on PLA materials with the aim of application in lightweight outerwear. The materials presented are examples of solutions used in the industrial process of the manufacturing and finishing of so-called seamlesswear products. The structure of the materials in the solutions of left-right stitch applied was determined by the indicator of the degree of filling of the knitted fabric “k”, used in the filling characteristics of the linear structure of knitting materials made from the same type of yarn. The functional properties of the materials were determined in the scope of selected indicators, important in the aspect of physiological comfort and clothing’s quality of wear. The PLA yarn was subjected to the assessment selected qualitative and hygroscopic indicators, which was carried out in relation to selected multifilament polyester yarns of similar linear mass.
A more detailed understanding of flat textile products’ internal structure opens up new possibilities for research on the application use of voids in the structure of flat textile products, i.e. the arrangement and structure of the channels between threads and voids between fibres. The work presented is a continuation of research on the channels between threads performed by research teams from IW, TUL and Texo Systems. It refers to the study on the structural segmental models of woven fabrics conducted by the late. Prof. J. Szosland. In further works, a product micro-scanning method using structured light was applied, focusing on the study of the inlet diameter of the channels between threads. Analysis of the air permeability test results showed an influence of the size of the channels between threads (approximate volume of the channel, spacing surface area, coefficient of spacings, angle of channel inclination) and parameters of woven fabrics (type of weave, sett of warp and weft or tightness) on this parameter. Creating a spatial model of the channel between threads would enable to estimate the media flows through these materials (air and water vapour permeability, heat resistance) and electromagnetic radiation, e.g. IR, UV. The directions for further research were defined.
The work presented is a continuation of research on the interthread channels of single fabric taking into account the parameters of fabric structure. The stereographic method of threedimensional structure analysis of a single fabric, the method of 3D microscopy of fabric fragments in structural light and analysis of microscopic images of the 4th generation were introduced. Statistical analysis of the air permeability, water vapour resistance and thermal resistance indicators for flat textile products showed significant dependences of these flow rates on channel parameters as well as other fabric parameters. The correlation between the parameters measured and the flow indicators was determined. Very strong correlations of the air permeability indicator were found with the channel clearance area, warp count and approximate channel volume. A strong correlation with the thickness of fabrics was obtained for the water vapour resistance indicator. For heat resistance there was a strong correlation with the diameter of channel inlets. Strong correlations between fabric parameters and channel parameters were obtained for the channel clearance area and approximate channel volume, warp and channel ground area, weft count and fabric thickness, channel inlet diameter, and fabric thickness.
Przedstawiono rozwi¹zania z zakresu laboratoryjnych metod wykoñczenia tekstyliów poliestrowych, maj¹cych na celu osi¹gniêcie cech u¿ytkowego komfortu fizjologicznego wyrobów. Przeprowadzono modyfikacjê biochemiczn¹ materia³ów z zastosowaniem enzymów hydrolitycznych, a tak zmodyfikowany materia³ napawano oerodkiem o dzia³aniu przeciwdrobnoustrojowym. Oceniono wp³yw modyfikacji enzymatycznej na w³aoeciwooeci higroskopijne materia³u poliestrowego, a tak¿e odpornooeae cech antybakteryjnych na wielokrotne pranie. Wyniki badañ wskazuj¹ na nowe mo¿liwooeci technologiczne chemicznego kszta³towania specjalnych funkcji u¿ytkowych tekstyliów, wykorzystuj¹ce powierz-chniow¹ modyfikacjê struktury w³ókien poliestrowych.S³owa kluczowe: w³ókna poliestrowe, procesy wykoñczalnicze tekstyliów, modyfikacja biochemiczna, aktywnooeae antybakteryjna, komfort fizjologiczny wyrobów.
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