The leather manufacturing industries not only include core manufacturing industries such as tanneries, shoe factories, leather clothing, leather goods, leather materials, but also include accessory manufacturing industries such as leather chemicals, leather hardware, leather machinery, and manufacture accessories. The key reason for why leather has been popular and enduring for hundreds of years is its excellent and irreplaceable characteristics.
Leather is the non-perishable animal skin that has been processed by physical and chemical processes such as removing furs and tanning. Leather is closely woven from natural protein fibers in a three-dimensional space. The surface layer of leather has a specific grain surface layer, which has natural grain and brightness, and has a comfortable grip. The processing of cowhide animal leather is complicated, and the finished leather needs to go through dozens of steps, which include: (1)rawhide; (2)immersion; (3) meat removal; (4) deoxygenation; (5) furs removal; (6) alkali treating; (7) swelling; (8)deashing; (9)softening; (10) pickling; (11) tanning; (12)splitting; (13)smoothing; (14)retanning; (15)neutralization; (16)dyeing; (17)oiling; (18)fillin; (19)drying; (20)collection; (21) finishing; (22)finished Leather.
When drying the leather, in addition to paying attention to the quality of the leather, how to save energy and reduce the enterprise cost is also undoubtedly the important considerations for the leather enterprise. We are mainly introduce the key nodes of the leather drying process:
- The dried leather after tanning and fatliquoring generally contains over60% of water content, however, the moisture content of the finished leather material is required to be 12-18%. Wet leather is of high ductility, and the leather fibers has not been shaped, which cannot conduct mechanical works, whereas dried leather, whose skin fiber has been shaped, are easy for collection and cleaning.
- Hanging the leather on a rod or rope, controlling the moisture content of the leather at 30-40% before drying, and send it to the drying room.
- The Shuntec heat pump drying room is equipped with heating systems, heat dissipation system, blasting system, and air supply facilities, which will not be directly affected by the environment and climate. The main characteristic of Shuntec drying equipment is high efficiency.
- Making the moisture distribution in the leather skin becomes more even, and the dried leather should be stacked for over 12 hours in order to balance the moisture content in the leather skin.
Summary: by using heat pump dryer for drying the leather could make the drying temperature relatively uniform, and there will be no pollution to be discharged during the drying process. No personnel are need to guard if you chose Shuntec dryer, as they are equipped with a microcomputer control system to control the operation of the dryer equipment. In addition, the whole drying process is intelligently.