Leather and Footwear Journal最新文献_第4页

Evaluation of Physical Properties of Leather on the Bating Process by Combination of Papain Enzyme with Surfactant 木瓜蛋白酶与表面活性剂联用对皮革物理性能的评价

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.3

M. Z. Abidin, R. Yuliatmo, G. Griyanitasari

引用次数: 0

The Use of the Fuzzy Inference System in Determining the Quality of Goatskin as Raw Material for the Leather Industry 模糊推理系统在制革原料山羊皮质量评定中的应用

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.4

S. Mutiar, A. Kasim, E. Emriadi, A. Asben

引用次数: 0

Preliminary Study on the Adhesiveness Properties of Hide Glue 兽皮胶粘接性能的初步研究

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.7

L. Miu, M. Niculescu

{"title":"Preliminary Study on the Adhesiveness Properties of Hide Glue","authors":"L. Miu, M. Niculescu","doi":"10.24264/lfj.22.2.7","DOIUrl":"https://doi.org/10.24264/lfj.22.2.7","url":null,"abstract":"Adhesives based on collagen extracted from the skin, tendons, cartilage, bones of animals and fish have been widely used over time as binders and consolidating agents for various organic and inorganic materials. The use of these types of adhesives or glues or gelatins in the restoration activity has been practiced by restorers due to their properties, but also to the special requirements of reversibility of treatments that are stipulated in national and international norms specific to the restoration of heritage objects. For this purpose, the technology of gelatin extraction from bovine hide was studied, and then gelatins were characterized in terms of chemical properties (ash, total nitrogen, amino nitrogen, dermal substance, pH of analytical solution) and gluing experiments were conducted on collagen substrates (leather and parchment, newly made specifically for the restoration activity and some samples of historical parchment, pieces of parchment detached from the back of a heritage object) and characterized in terms of physical-mechanical properties (shear strength and peel strength). Gelatins made from bovine hide were also compared to a commercial product, rabbit glue, a material frequently used in the field of restoration.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41569576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fur Skin – A Valuable Material, Considerations on Quality Assessment 毛皮——一种有价值的材料，关于质量评价的考虑

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.5

C. Gaidău, Elisavet Amanatidou, Stoica Tonea

引用次数: 0

Research on Developing a Size System and Designing Shoe Lasts for Men with Diabetes in Vietnam 越南糖尿病男性尺码系统开发与鞋楦设计研究

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.1

Van-Huan Bui, Thi-Kien-Chung Cao, Duy-Nam Phan

引用次数: 2

3D Modelling of Customized Lasts Based on Anthropometric Data Acquired from 3D Foot Scanning – One Case Study 基于从3D足部扫描获得的人体测量数据的定制鞋楦的3D建模-一个案例研究

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.2

Maria Costea, A. Mihai, A. Seul

{"title":"3D Modelling of Customized Lasts Based on Anthropometric Data Acquired from 3D Foot Scanning – One Case Study","authors":"Maria Costea, A. Mihai, A. Seul","doi":"10.24264/lfj.22.2.2","DOIUrl":"https://doi.org/10.24264/lfj.22.2.2","url":null,"abstract":"Designing and manufacturing personalized lasts are the first steps in obtaining the right fitted footwear for various users, especially for sports or/and medical purposes. The accurate dimensional relationship between foot and last represents the key element for this activity. The critical shape of the last should always be determined by the shape of the foot and the cumulative relationship between lengths, widths, heights and girths, whatever method is used. Some corrections and constraints must always be considered because the shoe-last is not identical to the foot. The foot anthropometric measurements are modified based on biomechanical constraints and technological limitations and they are interactively transformed into last’s dimensions by using 3D modelling. The present study brings together the modern scanning technique with the new methodology for modifying a reference last, and it is aimed to explore the philosophy of re-designing functional lasts. It also tests and highlights the limits of the actual methodology for shoe-last virtual prototyping based on anthropometric data acquired from a commercially available 3D foot scanning system.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41982404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Mechanical Properties of Wet Blue Following Acid Bating Process Treated with Crude Enzyme from Rhizopus oligosporus 寡孢根霉粗酶处理湿蓝后的力学性能

Leather and Footwear Journal Pub Date : 2022-06-30 DOI: 10.24264/lfj.22.2.6

A. Nugraha, O. Suparno, N. S. Indrasti, H. Hoerudin

{"title":"Mechanical Properties of Wet Blue Following Acid Bating Process Treated with Crude Enzyme from Rhizopus oligosporus","authors":"A. Nugraha, O. Suparno, N. S. Indrasti, H. Hoerudin","doi":"10.24264/lfj.22.2.6","DOIUrl":"https://doi.org/10.24264/lfj.22.2.6","url":null,"abstract":"Enzyme is one of the ingredients used in several tanning processes such as bating. Bating is generally conducted under alkaline conditions, but it can also be carried out under acidic conditions. This study aimed to evaluate mechanical and physical properties of wet blue following bating conducted under acidic conditions treated with enzymes synthesized by R. oligosporus compared to those of the conventional process. This study was arranged on a completely randomized design with a single factor, i.e., five levels of enzyme activity (0, 2.5, 5, 7.5, and 10 U mL-1). The results showed that the use of enzymes from R. oligosporus influenced positively mechanical properties of the wet blue produced. Increasing levels of enzyme activity produced significantly higher tear strength and lower elongation at break values. No significant differences in tensile strength were observed following applications of both the synthesized and conventional enzymes. The synthesized enzyme was best applied at an activity level of 5 U mL-1 producing leather with good tear strength (55.40 ± 5.49 N mm-1) and elongation at break (45.63 ± 4.17 %) values, which were significantly different from those of 0 U mL-1, but not significantly different from those of 10 U mL-1 and the conventional process. Mechanical properties of the leather produced met the standard values for goat/sheep leather jacket as specified in Indonesian National Standard (SNI) 4593:2011. The results suggest that the synthesized enzyme from R. oligosporus can potentially replace the conventional enzyme commonly used in the bating process.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43371577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer composite based on NBR rubber compounded with rubber waste functionalized with potassium oleate 丁腈橡胶与油酸钾功能化橡胶废弃物复配的聚合物复合材料

Leather and Footwear Journal Pub Date : 2022-03-31 DOI: 10.24264/lfj.22.1.5

M. Nițuică, M. Stelescu, M. Sönmez, L. Alexandrescu, M. Georgescu, D. Gurau, Mirela Pantazi-Băjenaru

{"title":"Polymer composite based on NBR rubber compounded with rubber waste functionalized with potassium oleate","authors":"M. Nițuică, M. Stelescu, M. Sönmez, L. Alexandrescu, M. Georgescu, D. Gurau, Mirela Pantazi-Băjenaru","doi":"10.24264/lfj.22.1.5","DOIUrl":"https://doi.org/10.24264/lfj.22.1.5","url":null,"abstract":"Waste is a material that occurs as a result of a biological or technological process that can no longer be used as such. Recycling and reusing waste make it possible to contribute to environmental protection and, of course, to the protection of human health by eliminating toxins during waste incineration. The purpose of this paper is to process and characterize polymer composites based on NBR rubber (butadiene-co-acrylonitrile rubber) and rubber waste functionalized with potassium oleate in terms of rheological characteristics (to determine the optimal vulcanization time), Brabender diagrams and physico-mechanical properties in normal state and after accelerated ageing at 70°C, for 168 h (using elastomer-specific equipment). Functionalized rubber waste (with potassium oleate up to 20% at 60°C) is introduced into the mixture in proportions of 10; 20; 30; 50%. The polymeric composites based on butadiene-co-acrylonitrile elastomer and rubber waste (ground with a cryogenic mill at 10,000 rpm, at the size of 0.35 mm) were compounded on a mixer with a capacity of 350 cm3 according to the working recipes. The mixtures were supplemented with vulcanization activators and accelerators on an electric roller, resulting in formulations in the form of 4 mm thick sheets, which are then subjected to the relevant characterizations according to the standards in force for the footwear industry.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45769158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison and assessment of selected parameters of chrome-free and chrome-tanned leather 无铬革与铬鞣革选择参数的比较与评价

Leather and Footwear Journal Pub Date : 2022-03-31 DOI: 10.24264/lfj.22.1.1

E. Bielak, G. Zielińska

{"title":"Comparison and assessment of selected parameters of chrome-free and chrome-tanned leather","authors":"E. Bielak, G. Zielińska","doi":"10.24264/lfj.22.1.1","DOIUrl":"https://doi.org/10.24264/lfj.22.1.1","url":null,"abstract":"In the leather tanning industry, decision-makers act resolutely to eliminate chrome as a tanning agent due to its negative effect on human health and the natural environment. Considering this, it makes sense to research opportunities to use chrome-free leather as a substitute for chrome-tanned leather. This paper demonstrates research on the mechanical and hygienic properties of leather tanned with glutaraldehyde as well as chrome-tanned leather, intended for shoe uppers. The results of the tensile strength and percentage extension measurements made by the Instron tensile machine, and the results of water vapour permeability measurements made by a moisture analyser, have been analysed using Statistica. The statistical data analysis has been performed using the following tests: Kolmogorov-Smirnov with Lilliefors correction, Shapiro-Wilk, T, Levene, Brown and Forsythe, Fisher-Snedecor, and Cochran-Cox. Regarding mechanical parameters, no statistically significant difference has been observed between chrome-free and chrome-tanned leather in dry conditions. However, such differences have been observed in wet samples. The tests showed higher stability of mechanical parameters of leather tanned with modified glutaraldehyde compared to chrome-tanned leather. Leather tanned with a chrome tanning agent, tested in both dry and wet conditions, showed significant differences between them, considering their tensile strength and percentage extension. The hygienic properties of both types of leather being researched are more or less similar – the research has not found any statistically significant differences for water vapour permeability.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41925436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Plantar footprints and 3D foot shape digital analysis for overweight teenager – one case study 超重青少年足底足迹和三维足形数字分析——一个案例研究

Leather and Footwear Journal Pub Date : 2022-03-31 DOI: 10.24264/lfj.22.1.3

Maria Costea, A. Seul, A. Mihai

引用次数: 0