Plasticification of Leather Semifinished Chrome Tanning Using Biocatalitic Modifier

Danylkovych, Anatoliy; Bilinskiy, Sergiy; Potakh, Yiliia

doi:10.21303/2461-4262.2018.00527

Cited by 9 publications

(4 citation statements)

References 1 publication

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“…The study in [1] considers conditions for the primary processing of semi-finished leather products. The studies in [2][3][4] refer to the improvement of the technology of liquid processing of semi-finished leather products.…”

Section: Introductionmentioning

confidence: 99%

Study of the Efficiency of Squeezing Moisture-Saturated Products

2021

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The leather industry includes many technological machines; a squeezing roller machine is used in many operations, for example, in squeezing, degreasing, and after drum dyeing of a semi-finished leather product. The paper presents the results of experimental studies obtained by determining the influence of multilayer wet leather semi-finished products with monshons under squeezing on the amount of the moisture extracted. Mathematical dependences of the amount of the moisture extracted, for each layer of a five-layer wet leather semi-finished product on the feed rate between the squeeze rollers and the roller pressure were obtained. Experimental research is of scientific and practical importance for the development of a technological process for extracting moisture from wet leather semi-finished products used in the tannery, since the quality of the extraction affects the quality of subsequent technological operations, such as leather shaping and splitting. An experimental study was performed using the method of mathematical statistics, namely, the method of mathematical planning of the experiment. Mathematical models were obtained for the amount of extracted moisture from five wet leather semi-finished products depending on the rate of their simultaneous feed and the pressure of the squeezing rollers. The results of the experiment showed that in squeezing a five-layer product, the productivity of the technological process of extracting moisture from wet leather semi-finished products increases by five times in comparison with existing squeezing roller machines. The use of the results of the experimental study will contribute to a significant reduction in the energy consumption of the squeezing roller machine by simultaneous multi-layer processing of wet leather semi-finished products

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Section: Introductionmentioning

confidence: 99%

Study of the Efficiency of Squeezing Moisture-Saturated Products

2021

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“…With the effective use of a biocatalytic modifier, the stiffness index of the semifinished leather product is reduced by two times compared to the semifinished leather product developed according to the existing technology, while maintaining its mechanical strength [3]. It should be noted that this paper does not consider the removal of excess fluid from the semifinished leather product.…”

Section: Introductionmentioning

confidence: 99%

Controllability and stability capacity of a roll pair motion research

Khusanov¹

2022

Eureka: PE

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The process of deriving the equation of the perturbed motion of a roll pair during the processing of leather material is discussed in the article, taking into account the influence of dynamic factors. It is shown that one of the reasons for the unstable stress state on the contact surfaces in the roller mechanism are dynamic factors arising from inaccuracies in the manufacture of its individual parts, assembly defects, and the occurrence of an oscillatory process in the roller mechanism, as well as due to the non-uniform thickness of the processed material at its gripping during starting and stopping the machine. Methods for determining optimal controls are shown; they provide asymptotic stability of the unperturbed motion of a roll pair and the torque applied to the upper roll as a function of generalized coordinates.It is shown that the width of the contact strip of the clamp, which depends on the radii of the rolls and the hardness of the coatings, has a significant effect on the efficiency of the rolls. The larger the shaft radius, the lower the actual pressure per unit contact area. It is shown that the squeezing efficiency increases with the improvement of the conditions for the removal of the squeezable liquid from the rolls (with their horizontal arrangement), with an increase in its temperature and a decrease in viscosity. Efficiency decreases with increasing material speed and thickness. It is shown that the width of the contact strip of the clamp, which depends on the radii of the shafts and the stiffness of the coatings, has a significant impact on the efficiency of the shafts. The larger the shaft radius, the lower the actual pressure per unit contact area

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“…The study in [1] describes the current trend in applying vegetable tanning technology and wet processing methods based on new solvents, ionic and other liquids when solving the problem of using chromium in the leather industry. In [2][3][4][5][6][7][8][9][10][11], the influence of the technology of liquid, chemical, and mechanical treatment on the properties of leather collagens and its deformation and filtration parameters was studied. In [12], a review of 39 peer-reviewed articles in English devoted to the study of leather processing is given, of which 30 articles were published in the last 6 years.…”

Section: Introductionmentioning

confidence: 99%

Experimental dehydration of wet fibrous materials

et al. 2021

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The article presents the results of experimental studies to substantiate the performance of the method of simultaneous extracting excess moisture from wet leather semi-finished products. In the experiment, the influence of the feeding speed, the pressing force of the squeezing rollers on the amount of moisture removed from two layers of the leather semi-finished product after their squeezing was determined. The experiment was conducted using a moisture-removing material - a BM brand monchon, laid on a guide bar, on which two layers of the wet leather semi-finished product were previously folded. A monchon of the LASCH brand is folded between the layers of a semi-finished leather product. Due to the flexibility of the monchon, the displacement of semi-finished leather products movement path along the conveying device is reduced.

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Plasticification of Leather Semifinished Chrome Tanning Using Biocatalitic Modifier

Cited by 9 publications

References 1 publication

Study of the Efficiency of Squeezing Moisture-Saturated Products

Study of the Efficiency of Squeezing Moisture-Saturated Products

Controllability and stability capacity of a roll pair motion research

Experimental dehydration of wet fibrous materials

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