China's Ma Pi rich resources, is one of the ideals of leather raw materials. Mapi produced by the use of soft leather clothing, and the fullness of flexibility are good, grain formation and meticulous, and its unique natural grain pattern is even more so that it has a special charm. However, Mapi leather and there is a larger problem, the greater part poor, MA Guzi part of a "soft" is more serious difficulties. Cut even after the Blue Paper will be in the wet processing of hides Zhaizhang and because of "a twist" phenomenon. This paper Mapi the characteristics of garment leather Mapi the production technology for the study of the system, the corresponding technology programmes.
1 liming process of

For its collagen fibers to an appropriate degree of decentralization, the desired effect of liming, taking into account the cost of production, we liming in selected China-made liming auxiliary F (Wangjiang chemical plant production) and liming Wang - synergist T (Tingjiang chemical plant production) and conventional methods were compared. The results showed that the two liming auxiliaries have better liming, the amount of its best skin-1.2 percent. The amount too low to achieve the desired effect of liming, excessive consumption will increase their cost of production.

In liming process, we also joined the appropriate amount of sulfur sodium hydride, to enable it to ease the expansion to avoid excessive or rapid expansion arising from "Song of" phenomenon. Liming, to use hair follicles to open sodium sulfur hydride, sodium sulfide used a strong role in its deal with Black hair, hair root divisible. In this way, sodium sulfide and sulfur combination of sodium hydride Mapi for the liming, with 1.2 percent of liming additives, reached a more satisfactory liming purpose. Liming process: liquid than 2.5-3.0, at room temperature, sodium sulfide 1.5%, 1.2% sodium sulfur hydride, liming additives 1.2 percent, 10 percent of lime powder. First sulfur and sodium hydride Liming auxiliary to join, 20 minutes after the rotation, by adding sodium sulfide and lime powder, for rotating two hours, stopping one hour, then one hour, one hour stop, turn a half hours, stopping one hour, After an hour to 10 minutes, stopping the dark night.