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      Características físico-mecânicas e químicas do couro de caprinos abatidos em idades diferenciadas Translated title: Physical and mechanical characteristics quality of goats leather at different ages

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          Abstract

          Objetivando-se analisar as características físico-mecânicas do couro de caprinos, após o curtimento, utilizaram-se 16 animais machos mestiços Alpinos, com idades a partir dos 180 dias de vida, abatidos em intervalos de 45 dias (quatro animais por abate). As peles foram curtidas e recurtidas e dos couros retiraram-se três corpos-de-prova das regiões dorsal, paleta, ventral, anca e lateral, nas direções paralelas e perpendicular ao eixo crânio-caudal, para realização dos ensaios físico-mecânicos: distensão da "flor" no lastrômetro, rasgamento progressivo, resistência à tração, análises químicas de extração de lipídios, óxido de cromo, pH e cifra diferencial. A idade do animal exerceu efeito positivo no ensaio de resistência à tração, com superioridade para os caprinos de 315 dias de vida. A região e a posição em todos animais estudados apresentaram efeito significativo no ensaio de resistência ao rasgamento progressivo, nas quatro idades, atingindo o valor de referência mínima de 80 kgf/cm. A resistência do couro à distensão da "flor" dos caprinos estudados foi superior ao mínimo de 7 mm, demonstrando grande elasticidade dos couros, sem influência de idade ou região.

          Translated abstract

          This paper focuses on the analysis of goats leather to identify the physical and mechanical characteristics after toning. Sixteen male crossbred Alpine goats, with four animals from 180 days old by slaughter, were used. Slaughter intervals of 45 days were used. The skins were tanned and re-tanned, and from the breather the proofs from the dorsal, palette, ventral, hind and lateral regions, were taken, in the following directions: parallel and perpendicular to the tail-skull axis, so that the physic-mechanic studies could be performed: distention of the "flower" in the lastometer, progressive tearing; resistance to traction and chemical analyses of fat, chrome, pH and differential code. Animal age showed positive effect on traction resistance, with high values to goats at 315 days old. The region and position of all animals studied shower significant effect on the four reach ages, reaching the minimum reference value of 80 kgf/cm. Bather resistance to distention of the "flower" from the goats were superior to the minimum of 7 mm, showing the great elasticity of the bather, with no effect of age or region.

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          A Comparison of the Size Distribution of Collagen Fibrils in Connective Tissues as a Function of Age and a Possible Relation between Fibril Size Distribution and Mechanical Properties

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            User's guide: statistics

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              Practical Leather Technology

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                Author and article information

                Journal
                rbz
                Revista Brasileira de Zootecnia
                R. Bras. Zootec.
                Sociedade Brasileira de Zootecnia (Viçosa, MG, Brazil )
                1516-3598
                1806-9290
                October 2004
                : 33
                : 5
                : 1285-1291
                Affiliations
                [01] PB orgnameUFPB orgdiv1CCA
                [02] PB orgnameUFPB orgdiv1CFT orgdiv2Departamento de Agropecuária
                [03] Franca SP orgnameIPT
                [04] PB orgnameSENAI orgdiv1CNTCC
                Article
                S1516-35982004000500021 S1516-3598(04)03300521
                1371a0d1-ed95-4e38-979c-765f42597aa9

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 16 February 2004
                : 14 May 2002
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 29, Pages: 7
                Product

                SciELO Brazil

                Categories
                Produção Animal

                peles,skin,distention,goats,physical and mechanical characteristics,resistência,ensaios físico-mecânicos

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