Hide Preservation Without Salt Curing
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Solution Overview
Problem
The existing methods of preserving hides prior to tanning, such as salt-curing, cause significant environmental damage and are inefficient, especially when curing and tanning are done at different facilities.
Innovation Solution
A method that preserves hides by undergoing preliminary steps like washing, fleshing, liming, unhairing, deliming, and bating, followed by fatliquoring, pickling, and drying, without the need for salt-curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If salt-curing is used to preserve hides prior to tanning, then the hides can be preserved and shipped to overseas tanneries, but significant environmental damage occurs and the hides are heavier increasing shipping costs
Solution Approach 1:
The invention extracts and eliminates the salt-curing step from the traditional leather-making process. By removing this harmful preservation method and replacing it with alternative preservation techniques (such as freezing or other non-salt methods), the patent eliminates the environmental damage caused by salt waste while maintaining the ability to preserve and ship hides to overseas tanneries
Solution Approach 2:
The invention changes the preservation parameters from salt-based chemical preservation to alternative methods. This may involve changing from chemical (salt) preservation to physical preservation methods, thereby eliminating the harmful salt waste discharge while maintaining preservation effectiveness
2Reliability
If salt-curing is used to preserve hides, then the hides can be preserved, but the hides include waste by-products and salt that create disposal problems for tanners
Solution Approach 1:
The invention extracts and eliminates the salt-curing step from the traditional leather-making process. By removing this harmful preservation method and replacing it with alternative preservation techniques (such as freezing or other non-salt methods), the patent eliminates the environmental damage caused by salt waste while maintaining the ability to preserve and ship hides to overseas tanneries
Solution Approach 2:
The invention discards the salt-curing step entirely and does not introduce salt into the process. By using alternative preservation methods from the outset, there is no salt waste to dispose of, eliminating the disposal problems that tanners face with traditional salt-cured hides
3Reliability
If salt-curing is used to preserve hides, then the hides can be preserved, but the hides are heavier increasing shipping costs
Solution Approach 1:
The invention changes the preservation parameters from salt-based chemical preservation to alternative methods. This may involve changing from chemical (salt) preservation to physical preservation methods, thereby eliminating the harmful salt waste discharge while maintaining preservation effectiveness
Data Source
AI summary
A method for preserving hides, skins and pelts prior to tanning, without salt-curing. The preliminary steps of washing, fleshing, liming, unhairing, deliming and bating the hides are followed by the steps of fatliquoring, pickling and drying. The method avoids the environmental damage caused by salt-curing. The treated hides are dry, flexible and readily rehydrated for further processing.