The principal tannery operations carried out, typical of many tanneries throughout the Bangladesh may be summarized as soaking, liming, unhairing, fleshing, deliming, bating, pickling and tanning etc. The deliming process is done to remove free liming chemicals from its surface. After liming the lime or other alkali in the skin is no longer required and in most cases it has detrimental effect on subsequent tannage. So the controlled amount of acid or acid producing salts is added to the water. Ammonium salts is particularly used in our local tanneries.
Analysis of tannery liquid waste indicates that deliming cause considerable problem from the high concentration of ammonium ions up to 70% of ammonia ions discharged in tannery effluents in the result of the use of ammonium salt in deliming.
To find the replacement for ammonium salts Leather Research Institute has screened out number of dicarboxylic acid. Glycolic acid based ammonia free deliming agent is being prepared (Deliming value of Glycollic acid is determined). It is organic acid and containing carboxyl group. It is mild in nature and capacity to combine with calcium ion strongly.
In the extended time glycolic acid will be used to carry out comparative leather deliming experiment against ammonium sulphate and with the major examination indexes are deliming speed, pH value, change of deliming solution etc.
The main objective of the proposed project is to develop footwear that is specially designed for diabetic patients who have neuropathy (loss of sensation), minor foot deformation and have developed minor foot complications earlier. It has been constructed over the positive model of the patient’s foot, using leather and other materials of equal quality with some form of sandals. Recurrence of foot ulcers can be prevented by using footwear, which provides effective load distribution.
Introduction including socio-economic importance: In a statistical research it was shown that, in Bangladesh, 1.5% to 2.0% of the whole population is suffering from diabetes. That means over 30 lakh people is diabetes patient. In other words, over 60 lakh feet are in danger and needs special care.
The most dangerous information is that most of them don’t even know that they have diabetes. So when perfect diabetes footwear will be launched in the market it will help to increase the consciousness among the affected people as well as it will help them to keep their feet safe and controlling their diabetes. . Moreover diabetes footwear can help in body cooling and reduce the hot damp atmosphere that may cause the development of fungus and bacteria inside the shoe. Finding no other alternative, for a long time, the diabetic patients of our country are compelling to use canvas shoes, which lacks both functional properties and aesthetic standards. Therefore, development and availability of a pair of diabetes friendly leather shoe/footwear would be a matter of hope and pleasure to them. Though diabetic shoes may cost more than normal shoes, but they are worth of it.
Prototypes have been developed and field trial of those shoes is being carried out at BIRDEM hospital
In last one decade the footwear manufacturing industry of Bangladesh has increased impressively but there is only one last manufacturing unit which is producing shoe last only for casual shoes. No specialized types of lasts are available in the country. This project will attract the footwear last manufacturer especially new last manufacturing entrepreneur to make the Diabetic footwear last. By developing these types of last it can be expected that the availability of diabetic shoe manufacturing facilities will be in hand. As a result, diabetic patients will be benefited through using diabetic shoes.
The main purposes of the proposed R & D project are to design and development of shoe last of different size and shape. For manufacturing any kind of footwear any kind of footwear “Last” is an essential tool. It gives shape to the footwear; in short, this is the skeleton of footwear.
Leather sector is one of the promising sectors in... Read More