When yarn is formed by adhesive methods, the strength of the yarn is ensured by gluing the sliver with some binder, i.e. due to adhesion. The analysis of the existing methods of instrumental assessment of adhesion of materials to binders of various compositions is carried out. Based on the well-known classification of methods, a method for assessing adhesion is justified, which consists in determining the breaking load during the tangential displacement of fibres in the bundle, as the most suitable for fibrous materials. A single indicator was established – breaking load, related to the average length of the fibres that glide upon destruction of the sample in the form of a bunch of the studied fibres, which allows an objective comparison of the various composition of adhesives. A preliminary estimate of the length of the sliding fibres in the beam was carried out.

An experiment was conducted to measure the adhesion forces of PVA, PVA and sericin adhesive solutions to cellulose materials. A model of the dependence of the adhesion forces on the concentration of the adhesive substance is proposed.

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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.