Визначення міцності зв’язку між шарами та еластичності склеєних кишкових плівок

Abstract

Проаналізовано методи визначення міцності зв’язку між шарами склеєних матеріалів, запропоновано їх технічне спрощення та зменшення собівартості з метою застосування у випробуванні склеєних кишкових плівок. Встановлено характеристики міцності зв’язку між шарами та еластичності склеєних кишкових плівок, виготовлених зі свинячих черев за відомим способом та із застосуванням дублення таніном, як заходу зі зниження їх гідрофільності та оберненості процесу склеювання-розшарування. Визначено товщину сухих склеєних двошарових кишкових плівок.

It is shown that the strength of links between layers of glued gut films is one of their crucial mechanical parameters, and achievement of the decrease in a degree of the convertibility of the process of gluing-stratification of natural films will solve an important scientific and applied problem of rational use of this animal raw material. Based on the analysis and generalization of the methods of determining the strength of links between the layers of glued materials in order to assess the strength of gluing the layers of gut films, significant technical simplification and reduction of the cost of testing, the method suggesting to stratify the sample and determine the strength required for separation of the two tested layers from each other, using the weight loading is proposed. The results of determining the strength of the link between the layers and elasticity of the glued gut films and substantiation of the expediency of additional plant tanning for their formation are obtained. It is found that traditionally glued gut films in a dry state have a high bond strength of their layers – 358 N/m. Immersion in water for 15 minutes reduces this figure by 3,14 times. Tanning in 0,1–3,0 % tannin water solutions leads to a general increase in the strength of the bond in wet state of 20 N/m, however, is characterized as insufficient to solve the problem of forming an ample bonding strength in a wet state. An assumption about the feasibility to combine tanning with the engagement of clutching activators (primers) is made. The relative lengthening of the glued gut films in the wet state compared with the gut fabrics and strips cutted from them is decreased. The changes in relative elongation, to a greater extent, are characteristic for the glued gut subjected to tanning. The thickness of dry glued double-layer intestinal films made of swine belts is established.