Leather and Footwear Journal

Volume 7, no 1

Contents
- Contents PDF
Analysis on Recovery Splitting out the Proteins from Chrome Leather Wastes by Hydrolysis Process. Part I
- Pages 5-21
  Mihaela GHIGA¹, Carmen GAIDĂU¹, Marian CRUDU¹, Emil STEPAN²
  - ¹INCDTP – Leather and Footwear Research Institute (ICPI), Bucharest RO, e-mail: icpi@icpi.ro
  - ²INCD-ICECHIM Bucharest RO
  ABSTRACT. The studies are aimed at high performance processing the chrome tanned leather wastes enabling the most of their protein constituents to be reclaimed, and the chromium containing fraction to be separated as an inert waste by lasting adsorption onto the red mud activated to entrap any heavy metals. The protein constituent extracted from chrome tanned leather wastes is intended for a large range of applications, such as: organic nitrogen source for farming fertilizers, biodegradable materials for horticultural use, surfactants for building materials, eco-adhesives, fillers and retanning agents for leather, etc.
  
  KEY WORDS: processing, leather wastes, protein, biodegradable materials
Influence of the Foot Biomechanics on the Footwear Design
- Pages 22-37
  Ana Maria VASILESCU, Gheorghe BERIJAN, Bujorel JIDIUC
  - INCDTP – Leather and Footwear Research Institute (ICPI), Bucharest, RO, e-mail: icpi@icpi.ro
  ABSTRACT. Foot biomechanics analysis is aimed at understanding how the footwear characteristics can decrease the stresses on the anatomic feet structures. The study fields in biomechanics enabling the determination of variables used when describing and reviewing any motion are revealed. With the view of a rational footwear construction the specific load on the foot as the body supporting and moving organ has to known. Biomechanical and physiological foot variables have to comply with the following rules:
  - the last design shall take into account;
  - the main foot axles;
  - foot angles,
  - sizes resulted from anthropometric measurements;
  - footwear shape shall be designed according to the spatial last shape, materials and technology to be used.
  
  KEY WORDS: foot biomechanics analysis, characteristics, biomechanical and physiological foot variables
Assessing Methodology for Military Footwear Resisting in Desert Areas
- Pages 38-46
  Maria VIDRU
  - INCDTP – Leather and Footwear Research Institute (ICPI), Bucharest, RO, e-mail: icpi@icpi.ro
  ABSTRACT. The paper presents the results of investigations on techniques used in designing military footwear intended to resist under particular weather conditions such as desert weather. The most of the employed materials have been made in the country and selected by adequate methods enabling the material characteristics answering to the severe environmental conditions to be assessed. Such products have been designed and made so that in the particular environmental conditions to preserve the initial characteristics they have got when designed and manufactured. The behavior of the footwear intended to be used under particular environmental conditions was checked by accelerated ageing tests.
  
  KEY WORDS: military footwear, desert conditions, footwear characteristics
Research Regarding Calculation of the Agents for Constructive-Technological Design of Gloves
- Pages 47-59
  Marina MALCOCI, Stela BĂLAN
  - Technical University Chisinau, MD
  ABSTRACT. Classification of supplements and how are they calculated for the constructivetechnological design of gloves are presented in the work. Due to the application of accurate supplement values, the consumer will feel free and comfortable, and the product will not deform soft tissues. The supplement values can be increased or reduced within an admissible range, thus obtaining original and high quality products.
  
  KEY WORDS: constructive-technological design, gloves, supplement value, original and high quality products
Statistical Method Used to Assess the Results of Physical-Mechanical and Chemical Test. Part 1
- Pages 60-69
  Ion Petre SUCIU
  - INCDTP– Leather and Footwear Research Institute (ICPI), Bucharest, RO, icpi@icpi.ro
  ABSTRACT. The paper presents the calculation principle for the statistical data resulted from physical-mechanical and chemical tests performed on leather aiming to remove or rectify the improper data. The following are presented:
  - calculation formulae for statistical indicator
  - mathematic models being proposed.
  
  KEY WORDS: production planning, lean manufacturing, mixed integer linear programming, footwear factory