文档介绍：第五章 鞣前准备
Aims: not decay, and last for hundreds of years
Characteristic: Every hide and skin is unique, and varies not only from species to species, but even between individual animals.
Introduction to Leather Industry
What is Leather Technology?
raw hides and skins
leather
Tanners
制革者
Using modern techniques, tanners have to
produce the relatively uniform leather, and add
further features, such as colour, softness and
fullness(丰满度), to the leather according to
customer’s requirements.
Introduction to Leather Industry
The production in a tannery (制革厂)
beam-house(鞣前准备) operations
tanning(鞣制) operations
post-tanning(鞣后) operations
finishing(涂饰,整理) operations
Introduction to Leather Industry
The following operations are typically carried
out in the
soaking(浸水),
unhairing(脱毛),
liming(浸灰),
fleshing(去肉)
and splitting(片皮,剖层)
Introduction to Leather Industry
beam house
Typically the following operations are carried
out in the
deliming(脱灰),
bating(软化),
pickling(浸酸)
and tanning.(usually, deliming, bating, pickling
belong to beam house processes.)
Introduction to Leather Industry
tanning area
In the tanning process, the collagen fiber of the
hide and skin is stabilized by the tanning agents so that the
hide and skin is no 1onger susceptible to putrefaction(腐
败), and the tanned hide and skin is called wet-blue(蓝湿
皮). (qualitative change)
--which can be traded as intermediate products.
However, manufacturing consumer products needs further processing and finishing.
Introduction to Leather Industry
generally involve :
retanning(复鞣) to improve the handle,
dyeing(染色) with water-soluble dyestuffs to produce
even colour over the leather surface,
fatliquoring(加油) to lubricate the fiber
drying.
After drying, the leather may be referred to as crust(坯
革), which is a tradable intermediate product.
Introduction to Leather Industry
Post -tanning operations
are to give the leather as
thin a finish as possible without harming the
natural