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A vacuum press system for wet tanning

A vacuum and leather technology, which is applied in the field of vacuum pressing system for wet tanning, can solve the problems of limited washing degree, etc., and achieve the effects of reducing energy consumption, reducing DMF residues, and improving dehydration efficiency

Active Publication Date: 2016-01-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the degree of DMF washing, it is usually adopted to increase the pressure of the roll line appropriately to increase the rate of liquid extrusion and multiple extrusion, but the degree of water washing is limited

Method used

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  • A vacuum press system for wet tanning
  • A vacuum press system for wet tanning
  • A vacuum press system for wet tanning

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] see figure 1 As shown, a vacuum press system for wet tanning in the present invention includes a vacuum press device 101, a press roll device 102 and a loop control system, and the press roll device 102 uses a granite roll; wherein, the loop control system includes a pressure Transmitter 103, pressure regulator 104, water ring vacuum pump 105, vacuum pipeline 106 and gas-water separator 107, wherein, water ring vacuum pump 105, communicate with gas-water separator 107 by vacuum pipeline 106, gas-water separator 107 and gas-water separator The vacuum box outlet pipe 13 of the vacuum pressing device 101 is connected, the pressure transmitter 103 is used to measure the vacuum degree in the vacuum pressing device 101, the water ring vacuum pump 105 is controlled by a PID controller, and the pressure regulator 104 is controlled according to the pressure transmitter 1...

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Abstract

The invention provides a vacuum pressing system for wet method tanning. The vacuum pressing system comprises a vacuum pressing device, a compression roller device, a pressure transmitter, a pressure adjuster, a water ring vacuum pump, a vacuum pipeline and an air-water separator. The water ring vacuum pump is communicated with the air-water separator through the vacuum pipeline, the air-water separator is communicated with a vacuum box outlet pipeline of the vacuum pressing device, the pressure transmitter is used for measuring the vacuum degree of the interior of the vacuum pressing device, the water ring vacuum pump is controlled by a PID controller, and the pressure adjuster transmits control signals to the PID controller to control the rotating speed of the water ring vacuum pump according to vacuum degree signals, measured by the pressure transmitter, of the interior of the vacuum pressing device. The vacuum pressing system for wet method tanning is used for increasing the DMF and water extraction rate of PU synthetic leather in the water processing process, the DMF residual quantity of the PU synthetic leather can be quickly reduced, water extraction efficiency of the vacuum pressing system is improved, and energy consumption generated in the drying process is reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of leather manufacturing, and in particular relates to a vacuum pressing system for wet tanning. 【Background technique】 [0002] Synthetic leather is the best substitute for natural leather. At present, the wet production process of PU synthetic leather is to dip-coat, scrape-coat, solidify, wash the base fabric once, and then use circulating heat transfer oil to dry to obtain the finished product. Among them, the purpose of the washing process is to replace the DMF (dimethylformamide) solvent in the PU synthetic leather with water. The process requires that the DMF content in the tank should be below 1%, so as to ensure that the DMF in the PU synthetic leather is washed clean to avoid After drying, the surface of the PU synthetic leather has pitting and other defects, and becomes a defective or waste product. The traditional washing tank is composed of rolls and guide rolls, in which PU synthetic leather...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B9/20B30B15/00
Inventor 汤伟李含君张怡真王震
Owner SHAANXI UNIV OF SCI & TECH
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