Purpose: The ultrasonic amplitude method for controlling the surface texture density
of textile materials was first studied and used.
Design/methodology/approach: For the first time, the surface texture density has
been determined. The research was conducted using the ultrasonic method, rather than by
mathematical calculations, which made it possible to invent a new approach to contactless
quality control of textile materials. In order to identify the functionality of bicomponent textile
material, formed from raw materials with opposite hygroscopic properties, two-layer knitted
fabrics were chosen to protect the human respiratory organs. As a hydrophilic type of raw
material used yarn with composition is as follows – cotton 34%, flax 33%, viscose 33%, and
in the function of a hydrophobic raw material, polypropylene multifilament yarn. Using the
ultrasonic method, studies of a new type of knitwear were carried out, the values of the surface
density of the material were obtained. Products from this composition provide respiratory
protection from dust and comfortable work in the area of road repairs up to 8 hours.
Findings: The combination of natural and synthetic materials for individual masks allowed
them to be used under different operating conditions. The problem of structure and design
of materials was resolved through the use of computer technology and computer-aided
design of textiles, and the possibility of applying the ultrasonic amplitude method to control
the surface density of textile materials was substantiated. During the analysis of the results
of experimental studies, it was found necessary to ensure the uniformity of the physical and
mechanical properties of textile materials in the production process. Using the ultrasonic
method, the thickness gauge was used to determine the surface density of various materials
for the manufacture of personal protective equipment for road maintenance workers.
Research limitations/implications: The method of measurement has been tested and
has no limitations. However, the study was conducted on samples of textile materials that
were manufactured in Ukraine and according to patents of authors.
Practical implications: Individual masks for the protection of human respiratory organs
are recommended for use by road workers and cyclists.
Originality/value: The originality of the results of the article is the experimental data of
studies on the content of textile materials and the accuracy of measuring their surface
density by an ultrasonic contactless device.
The Effect of Fibre Composition and Washing Conditions upon Hand Properties of Knitted Materials