Wyniki wyszukiwania - BazTech

1

Images of corona discharges as a source of information about the influence of textiles on humans

Ciesielska I. L.

Autex Research Journal

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2009

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Vol. 9, no. 1

36--41

EN

The aim of the experiment was to bring closer the possibilities of using corona discharge photography (CDP), with special emphasis on the impact of textiles on corona discharge photography of human fingertips in contact with those textiles. The article describes an investigation concerning a short period of contact with textiles and their influence on human parameters such as blood pressure (BP) and heart beat (HB) as well as images of corona discharges (ICD). The authors were searching for a new method of demonstrating the influence of textiles on human subjects. As the research involved contact of textiles with human skin, certain static and friction issues were raised. Textile materials were chosen for the experiments on the basis of their tribological features. The ICDs used here were created as a result of placing body parts, e.g. fingers, in the area of a strong electrical field of high voltage (10 KV) and high frequency (1024 Hz). A digital camera placed within the area of discharge recorded this phenomenon. The temperature, air humidity, and air pressure in the examination room as well as gender, age, HR, BP and in the case of female volunteers, their menstrual cycles, exerted an effect on ICD in the study group. ICD of human beings seems to be a kind of marker of tribological features of textile materials.

2

Fancy yarns - an appraisal

Grabowska K E, Ciesielska I. L., Vasile S.

Autex Research Journal

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2009

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Vol. 9, no. 3

74--81

EN

The great interest in fancy yarns area was noticed at the textile market all over the world as well as in science area. That interest may be the consequence of liberalization in trade with countries like China. Due to liberalization in fancy yarns sector trade between Europe and Asia, the main Asian producers of fancy yarns compete with each other to offer more and more sophisticated products. The production of fancy yarns has been differentiated and enriched in such scale that makes almost impossible to catalog and standardized all the produced types. However, certain activities has been taken up at The Technical University of Lodz with cooperation of the University of Gent to investigate the area from scientific point of view, mainly by tests based on fancy cotton yarns e.g. spiral, loop and bunch as well as fancy elastic yarns e.g. spiral, bunch and flame yarns. The aspects of fancy yarns implementation into fabrics will be considered as well as positioning those scientific activities at the European level with connection to the global policy. Therefore, the aim of this paper is bringing closer the matters concerning fancy cotton yarns and fancy elastic yarns from scientific point of view on a base of chosen examples carrying out a comparison of physical properties of those fancy yarns, the introduction of those yarns as wefts into fabrics. The aesthetic aspects and behaviour at wear of final products will be considered. The first experiment concerns the production, on the ring twisting frame, of three types of fancy cotton yarns, spiral, loop and bunch which were differentiated in respect of twist, linear density, the angel of lap of pegs by yarn on the slat of ring-twisting frame (the input only for spiral yarns) and the frequency of rocker's action in ring-twisting frame (the input only for bunch yarns). All obtained yarns were analysed in respect of real value of twist (t/m), linear density (tex), breaking force (cN/tex), elongation during breaking (%), air index (m/sec), bending rigidity (cN*cm) and width of hysteresis from bending rigidity test (cN*cm/cm). The fancy cotton fabrics were analysed in respect of mass surface (g/m2), friction-mass loss (g), piling, flexural rigidity (mg*cm), tearing (N), creasing, breaking force (cN/cm) and elongation while breaking. The second experiment concerns the production, on the hollow spindle, of three types of fancy elastic yarns, loop, bunch and flame yarns which were differentiated in respect of twist (t/m), linear density (tex), the value of stretch given to the elastic component (%) and preparation of the bobbin - precise and normal. All obtained yarns were analysed in respect of real value of twist (t/m), linear density (tex), breaking force (cN/tex), elongation during breaking (%), air index (m/sec). The fancy elastic fabrics were analysed in respect of mass surface, flexural rigidity (mg*cm), creasing, breaking force (cN/cm) and elongation while breaking (%) and dimensional stability. All the statistical analyses were carried out with usage of multiple regression module.

3

Analiza wpływu tekstyliów na wyładowania koronowe

Ciesielska I. L.

Zeszyty Naukowe. Włókiennictwo / Politechnika Łódzka

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2008

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z. 64

41-57

PL

Praca dotyczy badania wpływu tekstyliów na obrazy wyładowań koronowych powstałe wokół opuszków palców rąk ochotników. Prezentowane badania mają na celu stwierdzenie czy fotografia wyładowań koronowych (FWK) jest wiarygodnym i rzetelnym źródłem informacji o stanie człowieka, który wchodzi w kontakt z tekstyliami. Stwierdzenie "stan człowieka" dotyczy zarówno jego emocji, jak również wybranych parametrów fizjologicznych. Choć motywem przewodnim pracy pozostaje FWK opuszków palców człowieka, to na uwagę zasługuje też fakt podjęcia działań zmierzających do odpowiedzi na pośrednio postawione pytanie o odczuwanie tekstyliów i ich, krótko - i długotrwałe, oddziaływanie na człowieka.

EN

A corona discharge is an electrical discharge observed in gases which occurs on the surface of charged conductors. In the induced electrical field, charge carriers (free electrons and positive or negative ions) present in the air surrounding the surface of optic plate and the object collide with other charge carriers interacting with one another. An electrical impulse transmitted to the plate after placing an object on it stimulates the response of the object by the movement of charge carriers. Free electron re-association is followed by a visible glow. This phenomenon is recorded around the fingertip. The preliminary experiments present researches on the influence of cardiovascular disease of human on CDP of their fingertips. One of the symptoms that accompanies patients suffering from cardiovascular diseases is an excessive perspiration. The factors affecting the CDP are potassium concentration, urea and sodium concentration in patient`s blood. Those substances are removed from the organism also with sweat. Their excess or deficit has a significant impact on a character of corona discharge around fingertip of human. Analogous assumptions were accepted to design a first part of the experiment. Its main goal was finding out whether CDPs taken from fingertips of volunteers change while human beings stay in a short period of contact with textiles, other than those they wore in the moment of investigation. There are statistically significant differences between parameters of CDPs taken from fingertips while volunteers stayed in the contact with textiles made of different raw materials such as coarse wool, acrylic, viscose and they did not have contact with other textiles they wore. The second part is a continuation of the trend presented above. In that case an attempt was made to determine the long period influence of 2 sets of garments on changeability of CDP. The statistically significancant differences between textile sets were not detected in CDP of the volunteers. It is closely connected with adaptation of human organism to garments. The main aim of the third part is to find out whether the textiles, which were worn by the volunteers, have any influence on human organism subject to the physical effort. It was discovered that there are statistically significant differences between the values of respiratory coefficient registered during effort in volunteer wearing garments made of coarse wool and acrylic.

4

Textile Structures Modeled on a Spider’s Net

Frontczak-Wasiak I., Snycerski M., Ciesielska I.L.

Fibres & Textiles in Eastern Europe

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2008

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Vol. 16, no. 5 (70)

54--58

EN

Innovative textile fabrics modelled on the structure of a spider web can find application in the reinforcing of composites in conditions of where a centrifugal force occurs, for example rotational discs. At the Institute of Architecture of Textile at the Technical University of Łódź research work is carried out on mechanised production of woven fabrics whose structure is modelled on a spider webweb. The paper presents a review of textile techniques and technologies from the point of view of their usefulness for producing fabrics of a flatroundnet type structure modelled on the structure of a spider web.There is also an analysis of the mechanical properties of the different textile structures from the point of view of fulfilling the requirements to operate in conditions which are affected by a centrifugal force..

5

The Influence of Textiles on Corona Discharge Created Around a Human Fingertip

Ciesielska I. L., Masajtis J.

Fibres & Textiles in Eastern Europe

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2007

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Vol. 15, no. 5-6 (64)

179--184

EN

A corona discharge is a visible, electrical discharge observed in gases, which occurs on the surface of charged conductors. In our research, the discharges were generated around human fingertips and recorded in the form of films during the test while a number of people were in contact with different textiles for a short period. The aim of our experiments was the estimation of the possibility of using corona-discharge-films (CDF) for the investigation of the impact of textiles on the CDF of human fingertips. This article describes the investigation, aimed at determining if a test-person’s short period of contact with textiles, such as knitted acrylic, wool and viscose fabrics, influences the corona discharge of the test-person. The research results confirmed these assumptions.

PL

Wyładowanie koronowe jest widzialnym wyładowaniem elektrycznym obserwowanym w gazach na ogół generowanym polem elektromagnetycznym. Pojawia się na powierzchni przewodników obdarzonych ładunkiem elektrycznym. W naszych badaniach wyładowania te były generowane wokół opuszków palców ludzi a następnie rejestrowane w postaci filmów podczas gdy osoby biorące udział w badaniach pozostawały pod krótkotrwałym wpływem różnych tekstyliów. Celem badań była ocena możliwości wykorzystania filmów z wyładowań koronowych (FWK) i badanie wpływu tekstyliów na FWK zarejestrowanych wokół opuszków palców ludzi. Artykuł opisuje badania polegające na stwierdzeniu czy krótki kontakt człowieka z tekstyliami, w naszych przypadkach, dzianiną poliakrylonitrylową, wełnianą i wiskozową wpływa na FWK osoby. Wyniki badań potwierdzają możliwości wykorzystywania FWK.

6

The Influence of Component Yarns’ Characteristics and Ring Twisting Frame Settings on the Structure and Properties of Spiral, Loop and Bunch Yarns

Grabowska K. E., Vasile S., Van Langenhove L., Ciesielska I. L., Barburski M.

Fibres & Textiles in Eastern Europe

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2006

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Vol. 14, no. 3 (57)

38--41

EN

The aim of this research is to provide reliable information, provided in the form of statistical models, regarding the possibilities of modifying the structure and the mechanical properties of fancy yarns by changing the component yarns’ characteristics and the machine settings. Three types of fancy yarns (spiral yarns, loop yarns and bunch yarns) were produced via the ring twisting method. The statistical dependencies between (some) component yarn characteristics and machine settings as input and (some) fancy yarn characteristics and structure as output are presented in this paper

PL

Prezentowany artykuł przedstawia wyniki szerokiego spektrum badań dotyczących nitek ozdobnych, prowadzonych w ramach wspólnego projektu międzynarodowego zawartego pomiędzy Belgią i Polską. Celem tych badań było dostarczenie rzetelnych informacji, opartych na wynikach analiz statystycznych, dotyczących możliwości modyfikacji struktury i właściwości mechanicznych wybranych grup nitek ozdobnych w oparciu o parametry charakteryzujące nitki komponentowe oraz parametry opisujące proces produkcyjny (nastawy maszyn skręcających). Wyniki przeprowadzonych badań pozwalają na przedstawienie „przepisów” realizacji różnych typów nitek ozdobnych.

7

Odczuwanie tekstyliów - wybrane zagadnienia

Masajtis J., Ciesielska I.L.

Przegląd Włókienniczy - Włókno, Odzież, Skóra

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2004

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nr 10

34-35

8

Krawat dawniej i dziś

Barburski M., Ciesielska I.L., Masajtis J.

Przegląd Włókienniczy - Włókno, Odzież, Skóra

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2004

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nr 8

47-50