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Melt spinning of polypropylene (PP) multifilaments yarns: effect of myrrh resin on multifilament yarns properties
No full textMelt-spinning is the most widely used polymeric multifilament yarn production method. It’s easy to
scale and it is highly productive. Using this method can be formed multifilament yarns with various
functionalities, using additives. The aim of this research is to investigate the formation of melt-spun
multifilament polypropylene (PP) yarns modified with 10% ethanolic myrrh resin extract. In this study,
multifilament yarns were successfully formed from PP with a myrrh resin by melt-spinning at two
different drawing ratios (1.5; 2.5). It was indicated that processing parameters have a significant
influence on the multifilament linear density (tex), tenacity (cN/tex) and tensile strain (%). Modification
of PP with ethanolic myrrh extract has a significant influence on the mechanical properties of the melt
spun multifilament yarns
The effect of flame-retardant finish on jute and jute-cotton fabrics
No full textThe ligno-cellulosic Jute fiber, which holds the second largest volume among the natural cellulosic
fibers after Cotton. This study is focuses on the determination of flame-retardancy properties of pure
Jute and Jute-Cotton fabrics treated with Pyrovatex CP New at various concentrations (50%, 60%, 70%,
80%, 90% owf, M:L: 1:10, 1:7, 1:5). A significant improvement in the flame-retardancy was determined
on both fabrics. After ignition period, the recorded flame spread time was zero second on both FR treated
fabrics; on the other hand, it was measured 21 seconds and 28 seconds to burn the entire length (15 cm)
of untreated Jute and Jute-Cotton fabrics, respectively. Within these flame-spread times, the char length
was 2.2 cm and 2.73 cm in Jute and Jute-Cotton fabrics, respectively. Tensile and tear strength also
markedly decreased markedly after the FR finish in both warp and weft directions of both fabrics. The
vertical flammability results reported in this study show the potential application of Pyrovatex CP New
on Jute-based materials
Identification of wearing comfort of the textile uppers of commercial footwear
No full textKnitting technologies have contributed to the production of textile footwear not only to reduce waste,
but also to increase their physiological comfort. In this study, the functional properties of twelve
commercially available knitted uppers and two footwear leathers were identified. For each of the tested
variants, the following parameters were determined: thickness, mass per square meter, air and water
vapor permeability, and selected parameters related to the thermal insulation and moisture sorption. On
the basis of conducted research, it was shown that the best parameters were characteristic for knitted
fabrics with jacquard weaves produced on cylindrical crocheting machines of large diameters
The Conception of Intangible Resources in the Life Cycle of the Enterprise of the Future
No full textThe article is based on the statement that the conception of intangible resources
in the life cycle of an enterprise is a turning point for research on this
issue. The author exposes the essence of intangible resources in enterprises in
a new, original light – in the life cycle of the enterprise. The article seeks to
answer how intangible resources will change in the life cycle of enterprises
of the future
Manufacturing. Instructions for Laboratory
No full textLodz University of Technology Handbooks and Scripts, No. 2383First editionTechnical editing and typesetting : Norbert KępczakCover design : Paulina ByczkowskaMaking things has been an essential activity of human civilizations since before
recorded history. Today, the term manufacturing is used for this activity. For technological and
economic reasons, manufacturing is important to the welfare of the all developed and
developing nations. Technology can be defined as the application of science to provide society
and its members with those things that are needed or desired. Technology affects our daily lives,
directly and indirectly, in many ways. Manufacturing is the critical factor that makes technology
possible.
The word manufacture is derived from two Latin words, manus (hand) and factus
(make); the combination means made by hand. The English word manufacture is several
centuries old, and “made by hand” accurately described the manual methods used when the
word was first coined.
Manufacturing – Instructions for laboratory, is designed for a first course or two-course
sequence in manufacturing at the bechelor’s level in mechanical, industrial, and manufacturing
engineering curricula. Given its coverage of engineering materials, it is also suitable for
materials science and engineering courses that emphasize materials processing. Finally, it may
be appropriate for technology programs related to the preceding engineering disciplines.
Most of the script’s content is concerned with manufacturing processes (about 65% of the text),
but it also provides significant coverage of engineering materials and production systems.
Materials, processes, and systems are the basic building blocks of modern manufacturing and
the three broad subject areas covered in the script
Susceptibility of Family Companies to Benefit from State Aid During the COVID-19 Pandemic
No full textFamily businesses are the dominant form of business in Europe. A family
business is different to non-family businesses because they are distinguished
by families and ensure the safety of family members, working family members
and succession. Family businesses experienced the same problems during the
pandemic as other businesses in their sectors. Apart from generating profit,
family businesses are also responsible for ensuring the safety and survival
of their family members. This article will present the restrictions placed on
running a business during the lockdowns and assistance received from the
government and the European Union. Empirical research was conducted in
422 family and non-family businesses from August to October 2021 using
a Likert-based survey questionnaire. This article answers the main research
questions: Were family businesses more inclined to use state assistance
or less than non-family businesses? What were the most attractive forms
of support for family businesses available during the COVID-19 pandemic?
And how did this compare to non-family companies
Design and research of a new type of anti-vibration gloves with the use of distance knitted fabrics
No full textThe paper presents tests of vibration damping in anti-vibration gloves with knitted spacers. The research
was carried out at the Lodz University of Technology, Faculty of Materials Technology and Textile
Design. Measurements of the anti-vibration properties of the gloves were made on two types of vibration
generating devices - a hammer drill and an orbital sander.
Two gloves with spacer knitted inserts with different physico-mechanical parameters and one standard
available on the market were tested. The conducted research shows that all gloves have vibro-insulating properties to a different degree
Ogólnopolska Konferencja Naukowa Inżynieria Materiałowa - Materiały i Technologie
No full textProjekt okładki : dr hab. inż. Konrad Dybowski, prof. uczelni"Publikacja dofinansowana ze środków budżetu państwa w ramach programu Ministra Edukacji i Nauki pod nazwą „Doskonała Nauka”, nr projektu DNK/SP/547411/2022
kwota dofinansowania 40 000 zł całkowita wartość projektu 245 500 zł
Students designing for Phillips Poland
No full textMore on the website „Życie Uczelni” – p.lodz.pl/enArtykuł zamieszczony jest w : Życie Uczelni : biuletyn informacyjny Politechniki Łódzkiej, nr 159, Luty 2022Firma Phillips Poland Sp. z o.o. wraz z Wydziałem Technologii Materiałowych
i Wzornictwa Tekstyliów zrealizowała konkurs dla studentów Wzornictwa na
zaprojektowanie i utworzenie dokumentacji technicznej klapki do gniazda
znajdującego się na ciągniku siodłowym, czyli samochodzie ciężarowym
przeznaczonym do ciągnięcia naczep. Zwycięski projekt zostanie przez firmę
wyprodukowany.Phillips Poland Sp. z o.o., together with the Faculty
of Material Technologies and Textile Design, organised
a competition for design students to design
and create the technical documentation of a flap for
the socket located on the truck tractor. The winning
design will be manufactured by the company