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Influence of heat treatment on the bending behaviour of LLDPE monofilaments

Kolgjini B., Schoukens G., Kola I., Rambour S., Shehi E., Kiekens P.

Autex Research Journal

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2014

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Vol. 14, no. 3

187--199

EN

It is known that artificial turf surfaces based on LLDPE monofilaments have the potential to replace natural turf surfaces used for several sport surfaces. Even though the production parameters have a strong influence on the behaviour of monofilaments and indirectly on the final product, the effect of heat treatment at different stages of the production lines is not studied in detail. Therefore, the influence of heat treatment during the production of monofilaments was investigated. This investigation includes a study of the mechanical properties such as tensile testing and bending behaviour and morphological analyses by employing DSC measurements. The results show that the applied heat treatment has a strong influence on the bending behaviour even though the classical studied morphology structures do not show significant changes. Heat treatment influences quite importantly the characteristics of the non-crystalline part of the monofilaments and results in better long-term properties, such as resilience, deformation recovery and fibrillation resistance.

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Bending Behaviour of LLDPE Monofilaments Depending on Cold Drawing and Composition of the LLDPEs

Kolgjini B., Schoukens G., Shehi E., Kiekens P.

Fibres & Textiles in Eastern Europe

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2013

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Vol. 21, no. 4 (100)

23--30

EN

The behaviour of the pile layer of artificial turf is an important element for the performance of artificial turf. As a top layer, it is constantly under deformation, with the most possible being bending . The bending behaviour of monofilaments of linear low density polyethylene (LLDPE) is strongly influenced by the processing parameters, the type of polymer, and geometrical factors, which in combination with each other seem to have a strong influence on the behaviour of the final product. From the results obtained, the use of octene instead of hexene as a monomer yields better results for resilience due to a higher concentration of intrafibrillar tie molecules for the same degree of DSC crystallinity of the LLDPEs. The increase in the final cross section of monofilaments based on the same LLPDPEs resulted in a decrease in the intrafibrillar tie molecules due to a slower cooling after melt extrusion.

PL

Badania dotyczyły obróbki wykańczalniczej jedwabiu naturalnego. Mikrostruktura jedwabiu była badana za pomocą skaningowej mikroroskopii elektronowej, a właściwości mechaniczne testowane były klasyczną zrywarką firmy Instron, podczas gdy strukturę krystaliczną analizowano za pomocą spektroskopii w podczerwieni (FTIR) oraz rozproszenia promieniowania rentgenowskiego. Wyniki pozwoliły wytypować najlepszą w danych warunkach metodę obróbki.

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Evaluation of production effectiveness in garment companies through Key Performance Indicators

Spahija S., Shehi E., Guxho G.

Autex Research Journal

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2012

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Vol. 12, no. 2

62--66

EN

Key Performance Indicators help an organisation to improve productivity and to evaluate its success. Improved productivity is an essential part of increasing the value-added services that companies can offer to clients and hence their competitiveness. By using Key Performance Indicators, a company can establish baseline figures against a number of important areas. They can be considered like a health check on a company or a diagnosis of where a company can improve its performance. The definition of what they are and how they are measured does not change often, but Key Performance Indicators may change as the organisation's goals change. In this paper we present and discuss the way to establish Key Performance Indicators to evaluate the production effectiveness of garment companies. The KPIs are being tested in several garment companies in Albania and actually implemented in 25 companies.

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Anthropometric data for developing industrial standards in apparel manufacturing for the home market

Shehi E., Spahiu T., Guxho G.

Autex Research Journal

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2012

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Vol. 12, no. 3

76--80

EN

Standard measurements identifying body measurements are very important in apparel manufacturing because they help in identifying different sizes, economize the material, and decide on production quantities according the needs. Despite this, the industry has not accepted any one particular system for garment sizing so far. It is a wellknown fact that the production companies and merchandisers use their own sizing system as a marketing tool convincing customers of the advantages over other products available in the market. Despite the sizing system used, all the systems are based on the myth that humans have a body with proportional measurements. At the same time, the changes in life styles, nutrition and ethnic composition of populations lead to changes in the distribution of body dimensions (e.g., the obesity epidemic), and require regular updating of anthropometric data collections. Regarding the consumption of the garment products in Albania, there are about 840 garment companies mainly working for the foreign market. Only 2% of them produce for the home market, in a low percentage of their total production. The number of companies aiming to enter into the full package of production is increasing considerably, even those registering their brand name for the Albanian market. We can find examples of garment and shoes production companies going for the full cycle production for the home market in Tirana, Fier, Berat, Kavaja, and Shkoder. The industrial full cycle production for the home market requires anthropometric measurements and setting up the sartorial system. There is no sizing system in Albania that the producers can refer to. The industrial standard helps manufacturers to improve mass-produced garment and reduce cost of production.