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In the world of modern technology. Toward ethics of responsibility
No full textThe world has changed. This very poetic statement is certainly a truism.
However, one only needs to think of this change in a qualitative sense, and
this graceful sentence becomes truly profound. In ancient and pre-modern
times, life did not, change very frequently. It was mainly determined by
nature and a social circumstances. The pace of technological development
over the last two centuries, however, has been constant in its acceleration.
Moreover, what is equally significant, man’s natural environment began to
change and lose its natural character. Being surrounded by more and more
technical devices became “natural”. One may risk making the metaphorical
claim that technology has supplanted its nature. About this “change” and its
influence on man’s ethical actions, about possible evaluation of this change
and about the place that ethics will have (or should have) in the new system
treats the following text
Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej nr 161 (2022)
No full textUkazuje się od 1984 rOpis na podst. nr 27 (1993)Od nr 34 (paźdz. 1995) podtyt.: biuletyn informacyjny Politechniki ŁódzkiejOkładka: projekt red., foto: zasoby Działu Promocji i Instytutu Architektury Tekstyliów z Wydziału TMiWT
Development of stretchable conductive hybrid yarn for wearable electronics application
No full textWearable electronics and electronic textiles are becoming increasingly important as technology
advances. To supply the conductivity required in wearable electronics, investigations on the integration
of electronic components with textiles by adding conductivity to fabric structures, as well as the
development of items generated in this manner in terms of human comfort, have grown. The base
materials, i.e., yarns, should be as flexible, thin, and light as possible during the manufacturing and
incorporation of electronic textile components (sensors, transmission lines, connections, etc.) into
wearable products in order to tolerate the rigid structure and low elasticity of the metallic parts that
provide conductivity. In traditional yarn production processes, hybrid yarn production is regularly
carried out with numerous modifications. Problems arise in these manufacturing processes due to the
fact that the core fiber cannot be precisely positioned in the center of the yarn, the fluctuation of yarn
strength throughout the yarn, and the increase in yarn irregularity. The "Direct-Twist - 2C" twisting
machine, which can manufacture hybrid-yarn without modification, was employed in this investigation.
Unlike previous approaches, hybrid-yarn manufacturing with Direct-Twist aims to overcome the
problems found in other ways since the core can be positioned exactly in the center of the yarn. A new
hybrid-yarn was generated in this work by employing spandex in the core and silver-plated conductive
yarn in the coating. Tensile and resistance measurements performed within the scope of the study
demonstrate that a stretchable conductive hybrid-yarn structure with a homogeneous distribution of core
and coating structures is achieved
Numerical simulation of tensile fracture for hmwpe yarns using virtual fibers
No full textAs yarns control the ultimate failure of fiber reinforced composites, mechanical behavior warrants much
consideration. The present study focuses on the experimental and simulation analysis of the tensile
fracture behavior of twisted yarns. A quasi-fiber scale model of twisted yarns made of HMWPE fibers
is established using virtual fibers. The tensile fracture behavior of twisted yarns is simulated using a
maximum stress criterion with a random distribution of properties. The tensile fracture loads of six kinds
of twisted yarns agree well with the experimental results. The numerical precision and dispersion of the
proposed method are analyzed systematically. The influence of damage factor and displacement at
failures on the simulation results of twisted yarns are also obtained. Above modeling and analysis
method provides a helpful tool for understanding the yarn architectures of fiber reinforced composites
Analysis of digital skills in the textile and clothing industry through e-learning
No full textThe importance of digital skills has drastically increased over the last decades. Also in the Textile and
Clothing Industry, numerous software tools improve the efficiency of the work. To make sure that
students acquire the necessary digital skills, an Erasmus+ project has been set up. The ICT-Tex project
is a Knowledge Alliance aiming to improve the competences in information technology (ICT) for people
working in the field of the Textile and Clothing Industry (TCI). This will be done by developing
syllabuses that will be provided on an online platform, made available on the project website to all
interested parties; The 12 project partners come from all over Europe and join forces by making their
expertise available to the project. By the end of 2022 16 courses will be freely accessible. This paper
describes the methodology used to develop the content of these courses
The influence of polyamide fibres and knitted fabric structures on thermophysiological properties
No full textThis study aims to analyse the influence of distinguished polyamide fibres knitted in different ways to
improve the thermal physiological properties of fabrics used in clothing for bedridden patients. To this
end, four distinct fibre compositions were, each one, knitted into four different structures, and this plan
generated 16 samples. Structural characterization of the samples, permeability analyses, and Moisture
Management tests were carried out. Was possible to conclude that some parameters such as filament
dimension, fabric loop length, and how the yarns are knitted, have a direct influence on the thermal
behaviour of knitted fabrics. The sample made of PA fibre 44/40 in a jersey fabric, presented the best
results, due to its reduced thickness, superior loop length, and the use of a 40 multifilament
Seamless integration of textile-electronics in knitted fabrics for personalized health
No full textDevelopment in the field of wearable technology is beginning to spread in society. It mainly refers to
incorporated electronics devices which can be worn comfortably on the body. This paper presents an
evaluation of a developed implementation of a well-known knitting technique to create textile-electronic
interconnections that can be used for all kinds of electrical signals. Conductive textile wires have been
produced and electrically characterised for power transmission, analogue, digital and biopotential
signals. The results obtained for the different signal measurements are satisfactory and structures like
the samples can be used for wearable applications. The results are encouraging for future development
of a complete wearable garment with integration of only a minimum of necessary electronic components
for supporting developers in research on for instance p-health application
Melt spinning of polyethylene composite fibers containing disentangled ultra-high molecular weight polyethylene
No full textThe commercial entangled ultra-high molecular weight polyethylene (UHMWPE) shows a high degree
of entanglement in macromolecular chains, and our research group used the modified Ziegler-Natta
catalyst to prepare UHMWPE with a low degree of entanglement to improve its melt processability. The
application on plate-like material formed by injection or hot pressing has been explored, and at present
we would like to expand the application field to fibers and textiles. The disentangled UHMWPE is added
into the high-density polyethylene (HDPE) matrix by using twin screw extrusion for subsequent melt
spinning process. The experimental results show that the addition of ultra-high molecular weight
polyethylene improves the mechanical properties of fibers, and the effect varies with the addition
amount. The addition amount of UHMWPE is optimized as 45 wt.%, which significantly improves the
tensile strength of HDPE from 3.7 to 7.7 cN/dtex
Use of rooted hydrophytes in developing innovative functional textiles
No full textThe study attempts to experiment with the nelumbo nucifera (pink lotus) category of rooted hydrophytes.
In India, a lotus flower has a huge economical importance that it is used for worshipping. It was observed
that lotus cultivators generally cut the flowers with little length of the petioles leaving the rest as a waste
in the pond. Petioles contain bundle of microfibers and natural gummy substance called as mucilage
which is useful for medicinal applications. In recent times, resistance against the bacteria has become a
need of an hour. Researchers have developed the method for preparing non-woven sheet from lotus
fiber. This sheet was subjected to qualitative antibacterial test (AATCC 147) against four organisms -
Staphylococcus aureas, Klebsiella pneumonia, Candida Albicans and Pseudomonas aeruginosa. The
results have shown positive bacteriostatic antibacterial activity against all the above organisms which
proves that lotus fiber can be further taken for medical textiles