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Influence of Technology Process on Responsiveness of Footwear Nonwovens

Šajn Gorjanc Dunja, Bras Ana, Novak Boštjan

Autex Research Journal

2020

Vol. 20, no. 4

539--551

Nonwovens represent a part of technical textiles that are used for clothing (“cloth tech”). Nonwovens are also used in the footwear industry mainly for functional purposes, where the aesthetic properties are not of great importance. They are mainly used for support and reinforcement of footwear. All three groups of textiles are used for footwear, i.e. woven fabrics, knitted fabrics and nonwovens that are produced directly from fibres, yarns or threads mainly from chemical fibres and in a small proportion from natural fibres. Footwear textiles need to have good mechanical properties (at compressive loading), abrasion resistance, permeability properties and heat resistance. These properties are in close connection with the nonwoven structure or composite materials. The basic intention of the presented research was to analyse the influence of the technology process on nonwovens for footwear responsiveness. Analysed footwear nonwovens in the presented research were on one side coated but on the other side consisted of a two-layer laminate. For this purpose, two different technological processes were used (coating and lamination). The results of the presented research showed that laminated samples express higher elastic recovery at compressive loading than coated samples. The treatment does not have an important influence on elastic recovery at compressive loading. Laminated samples express higher water permeability and lower absorption of water than coated samples, even after 24 hours of treatment in distilled water and compressive loading. The treatment of specimens in distilled water for 24 hours and compressive load of 789.6 N does not have an important influence on elastic recovery at compressive loading, water vapour permeability, air permeability and absorption of analysed samples. Air permeability could not be measured on coated samples.

The use of digital technique in mapping and interpreting electron microscope images of fibres and other polymer objects

Wrzosek H.

Zeszyty Naukowe. Włókiennictwo / Politechnika Łódzka

2000

z. 58

293-301

The present paper presents the possibility of using the electron microscope technique for computer mapping of: -the image of the surface and cross section, and macroscopic characteristic of modified fibres; -the structure of composite systems, regarding the distribution of componenets and their shapes; -the way of distribution of coating substances, and layer bonding in the multilayer textiles; -the change of structure of needled nonwoven fabrics under mechanical treatment; -effectiveness of separation technical bast fibres into elementary fibres in biochemical treatment processes.