Study of changes in the technological performance of raw cotton when storing

The results of the experiments showed that with an increased density of raw cotton that occurs in the lower layers of the bundle and an increase in its shelf life, an increase in the mass fraction of defects and trash in the fibre is observed. It was found that with an increase in the density of raw cotton more than 250 kg/m3, the mass fraction of defects and weeds in the fibre increases by almost 10 %, the damage to seeds by 6 %, the staple mass length decreases by 3 %, and the proportion of short fibres by 9 %. The increase in the shelf life of the fibre also negatively affects the quality of the fibre and seeds and, most importantly, cotton for grades III–V. An increase in the mass fraction of flaws and trash in the fibre, in turn, affects the unevenness of the yarn and the quality category of the resulting yarn.

Application of bayesian networks in the evaluation of projects of corporate uniform

The article reveals the problem of making a decision on the design of a corporate uniform in the context of the contradictory requirements for uniformity of clothing for employees and the needs of participants in the dress code for self-expression. The combination of the above factors creates specificity in the assessment of uniform projects, since it becomes necessary to predict the stability of the dress code policy, the acceptance of its requirements by all interested parties. To solve this problem, a method is proposed for assessing the design decisions of a uniform from the standpoint of a balanced reflection in its design of the values of corporate culture and the possibilities of personal self-identification of participants in the dress code. The article considers an example of the development and testing of a semantic map, reflecting the probabilistic relationship of design parameters, in the assessment and refinement of models-proposals of a corporate uniform. The evaluation criteria presented in the semantic map format allow reflecting both the marketing role of the uniform in the promotion of the company′s services and the actual needs of the dress code participants identified during the expert discussions.

Features of design, construction and technology of manufacturing galvanoplastic jewellery

The features of design, construction and manufacturing technology of electroplated jewellery are considered. The classification of jewellery made by the method of electroforming, based on their areas of application, is presented. The technological features of the formation of the surface of products with a “posi-tive” and “negative” build-up of the deposited metal, ways of reducing the roughness of the deposited coat-ings with an increase in their thickness are considered. Methods of creating suspension and fastening ele-ments of the product structure are described. The main modern trends in the development of technology and design of products made by the method of electroforming are considered: the use of 3D technologies in the development and creation of models, the use of conductive polymer compositions for the manufacture of models, computerization of the technological process of forming metal deposits of precious alloys of a cer-tain carat and colour. Modern technological methods allow raising the level of electroplated jewellery de-sign to a new level.

Comparative modelling of the destruction of a soft armour barrier using two- and threedimensional textile materials based on orthogonal fabrics

The article suggests an approach to virtual testing of textile materials for high-speed penetration. The comparison of two materials developed using different technologies – 3D orthogonal fabric and a package of plain weave fabric is carried out. For this purpose, such parameters of fabrics are selected so that the surface density is identical, the number of layers is the same, the linear density of the threads would be the same. The material of the threads is aramid fibre. In general, according to the assessment along the warp and weft, the lesion area for 3D orthogonal tissue is higher by up to 30 %. At the same time, 31.7 % more kinetic energy of the bullet was extinguished.

The choice of adhesive for the production of yarn glue method

It is proposed to use sericin, a component of silkworm cocoons, as an adhesive compound for the production of yarn by the adhesive method. An experiment was conducted to study the dependence of the adhesion forces of the binder to cellulose on the concentration of the adhesive substance on the example of solutions of PVA, PVA and sericin. A comparative analysis of this dependence is carried out. Mathematical models are constructed to predict the strength of the adhesive joint depending on the concentration of the adhesive composition. The calculation of the adhesion forces per one elementary fiber is carried out.

Investigation of the influence of operational factors on the heat-protective characteristics of a package of materials for firefighter combat clothing

The article is devoted to the assessment of the impact of operational factors on the heat-protective performance of a package of materials of firefighter's combat clothing. The paper considers the influence of high humidity, compression of a package of materials, the presence of reflective elements in a package of clothing materials. The operational factors of influence on the heat-protective indicators of the package of materials of the firefighter's combat clothing, which reduce the protective action time by more than 3 times, are determined. The paper notes that it is the humidity and compression of the package of materials that change the nature of heating, which is due to an increase in the thermal conductivity of the layers when these factors affect the porous material.

Influence of washing on textile material thermal properties under exposure of an open flame and heating ele-ment heat flow

Elevated temperatures are factors causing harm to human health and life. To ensure protection, various personal protective equipment is used, which includes special protective clothing. The article discusses the heat-shielding indicators of the safety of textile material. In order to determine the heat-shielding properties of the material, various types of exposure are used – convective heat from a heating element and an open flame. Fabrics of various raw materials and surface density are used for sewing special protective clothing. Five clothes were selected for the research. The research was held under the exposure of an open flame and convective heat of heating element with a comparable heat flux density equal to 80 kW/m². Also, research was held under influence of multiple wash cycles on radiant heat transfer index and heat transfer index.

Methodology for the study and prediction of stiffness characteristics during bending rials for the design of adaptive clothing for people with motor disabilities

The article analyses the existing methods of studying the characteristics of bending stiffness. Topicality of improving the methodology for assessing and predicting bending stiffness in relation to the operating conditions of the studied contingent of consumers is substantiated. The methodology includes two main stages – an experimental study of the stiffness characteristics taking into account the characteristics of the range under study and a stage of forecasting the design solutions of the product. Comprehensive experimen-tal studies of the bending characteristics of modern fabrics of the jacket assortment for adaptive clothing of people with motor disabilities have been carried out. For an objective assessment of wear during use, the proposed method implements an additional forced bending of samples in opposite directions in order to bring the test results closer to real operating conditions. The results of experimental studies can be used at the design stage to predict the bending characteristics of the fabrics of the jacket assortment of clothing for people with motor disabilities.

A chair as an object of mass customisation

The article reveals the prospects of the process of creating individual items and services, taking into account models, methods and tools that help companies manage a variety of products. Examples of individual customisation of things found on the market are given. Attention is drawn to the segment of furniture products, which, according to the authors, is currently not sufficiently customised. Special attention is paid to the possibility of customisation and expansion of the product range with the help of parametric design on the example of a desk chair designed taking into account the dimensional characteristics of the human fig-ure.

Design of “industrial” textile ornament based on the ideas of russian avant-garde

The article presents the concept of industrial ornament, gives stylistic features. The main trends in the art of post-revolutionary Russia, which were the ideological and methodological basis for the formation of industrial ornament, are considered. The main features that should be reflected in the construction of an industrial ornament are identified: the motif of an ornament based on geometry, industrial objects, sports subjects, objects from a computer gaming environment; a three-dimensional spatial image of the motif of an ornament in three dimensions; a colouristic solution of an ornamental composition. The classification of compositional drawings for the construction of a rapport grid of avant-garde fabrics, as a basis for the con-struction of an industrial ornament, is given. In the course of the study, a method for constructing a textile industrial ornament was developed. Recommendations for the development of an ornament are presented Adobe Photoshop CC program with elements of 3D modelling. The author’s ornamental drawings have been developed according to the given recommendations.