Sensitivity of Temperature Field to Material Parameters within the Clothing Laminate Process

Textile laminate is created by introducing a thermoplastic polymer between the inner layer and outer material, which is then softened by heat. The connection is secured by adhesive properties of the polymer and the pressure applied after the heating zone. The state variables are defined as thus: the temperature of the heating zone and the pressure of rollers for the pressure system. The heat problem is described by the heat transport equation as well as the boundary and initial conditions. The distributions of the mean temperature within the polymer layer can be determined by numerical simulation. The sensitivity of the temperature field to the selected material parameters within clothing laminates is determined

Designing of casual wear for wheelchair users

Functionality and comfort are important requirements for adaptive clothing. To ensure the compliance of clothing with these requirements, it is necessary to take into account, on the one hand, consumer conditions, on the other hand specific needs driven from social and psychophysiological adaptation to the living conditions. Thus, for people who are restricted to the sitting position for their entire life due to their disabilities, it is important to avoid skin diseases that occur in conditions of constant contact of the skin with hard surfaces under pressure. Therefore, the aim of our work was to improve functional clothing for disabled people based on the analysis of ergonomics and consumer requirements through the application of new technologies

Analysis of Mechanical Properties of Laminated Seams

The main goal of this article is to analyze the seam quality by influence of lamination process parameters on the strength properties of laminated seams in cotton clothing products. The seam quality index is defined by maximal force to seam rupture and relative elongation during rupture. These parameters are obtained during the delamination test and shear test. The obtained statistical equations allow to describe, predict, and optimize the seam quality versus the product requirements and seam location within the product. The obtained results suggest that the strength properties of laminated seams can be determined by means of both mentioned tests

Tests of applications of transfer films in seams lamination technology

The main goal of the article is to investigate the replacibility of sewn stitches by laminated seams in cotton clothing products. The research objects are seams prepared experimentally in industrial conditions, laminated with thermal transfer film in the form of tape. There are determined (i) the lamination parameters on thermal press influencing the quality index of created seams, (ii) the effect of laminated seams on the aesthetic properties of the product. The permissible values of the quality index are compared for laminated and sewn seams. Hence, we conclude that the selected sewn seams can be replaced by laminated structures

Experimental and Numerical Determination of Strength Characteristics Related to Paraglider Wing with Fourier Transform Infrared Spectroscopy of Applied Materials

The aim of paper is to determine experimentally and numerically the strength characteristics related to the paraglider wing with Fourier transform infrared spectroscopy of applied materials. The applied method consists in theoretical modeling supplemented by the tests of material parameters. First, the set of 10 lightweight fabrics was selected for the tests; the samples are representative for these structures. The materials were tested using the spectroscopy to determine the FTIR spectra. The samples differ in the content of certain characteristic groups. Air permeability change of the materials was determined for the different pressure drops. The air permeability of almost all the analyzed samples was close to zero with the exception of only one material. The tensile strength and elongation at the break of samples were determined on the testing machine. The paraglider samples were characterized by slightly decreased mechanical properties compared to the parachute fabrics. The material characteristics determined during the tests are the input data for the theoretical analysis. The numerical model of the paraglider wing is based on a 3D geometry from previous research, but the stress, strain, and deformation were determined using the ANSYS Structural program and the finite elements method. To determine the strength correctly, we introduce two basic values: the absolute maximal and the representative values that are the biggest repetitive values of stress, strain, and deformation. The stress value was determined by the main factors: (i) the thinner the material, the bigger the stresses that were accumulated; (ii) the stronger the material, the bigger the stresses that were accumulated. The results are similar for all materials and differ mainly by the values. The biggest stresses were observed inside the material contacting the ribs, whereas the biggest deformation and strain were in the regions between ribs, and the smallest were in the contact areas with the fixed supports. Their highest intensity was observed on the leading edge of the paraglider. We conclude that the obtained stresses were far from the breaking level for the wing