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Drying process of chromium-free tanning skin blank

A technology of tanned leather and chrome-free tanning, which is applied in the drying process of chrome-free tanned leather, can solve the problems of low efficiency and slow speed, and achieve the effect of low loose surface rate, increased drying efficiency, and firm skin

Inactive Publication Date: 2020-01-21
LIAONING FUXIN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the drying process of chrome-free tanned leather embryos is to squeeze water first, and then vacuum hang to cool, but this drying process is slow and inefficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A drying process for chrome-free tanned leather embryos, comprising the following steps:

[0017] (1) Stretching and squeezing: After the chrome-free tanned leather embryo is dyed out of the drum, it is stretched and squeezed with a pass-through water squeezer. The squeeze water pressure of the pass-through water squeezer is 8MPa-10MPa, and the speed is 6m / min to 8m / min, the leather body is required to be flat and wrinkle-free;

[0018] (2) Wet shock: the stretched and squeezed skin embryo is transported to the wet shaker by the conveyor belt for wet shock, the wet shock pressure is 2MPa, and the speed is 7m / min;

[0019] (3) Vacuum drying: Lay it into a vacuum machine by an automatic skinning machine for vacuum drying, the vacuum drying temperature is 45°C, and the time is 230s;

[0020] (4) Stretch board drying: use 150 automatic rotary stretcher machines for stretch board drying, the stretch board drying temperature is 30° C., and the humidity is 25%.

[0021] The...

Embodiment 2

[0024] A drying process for chrome-free tanned leather embryos, comprising the following steps:

[0025] (1) Stretching and squeezing: After the chrome-free tanned leather embryo is dyed out of the drum, it is stretched and squeezed with a pass-through water squeezer. The squeeze water pressure of the pass-through water squeezer is 8MPa-10MPa, and the speed is 6m / min to 8m / min, the leather body is required to be flat and wrinkle-free;

[0026] (2) Wet shock: the stretched and squeezed skin embryo is transported to the wet shaker by the conveyor belt for wet shock, the wet shock pressure is 3MPa, and the speed is 9m / min;

[0027] (3) Vacuum drying: Lay it into a vacuum machine by an automatic skinning machine for vacuum drying, the vacuum drying temperature is 50°C, and the time is 240s;

[0028] (4) Stretch board drying: use 150 automatic rotary stretcher machines for stretch board drying, the stretch board drying temperature is 35° C., and the humidity is 30%.

[0029] The...

Embodiment 3

[0032] A drying process for chrome-free tanned leather embryos, comprising the following steps:

[0033] (1) Stretching and squeezing: After the chrome-free tanned leather embryo is dyed out of the drum, it is stretched and squeezed with a pass-through water squeezer. The squeeze water pressure of the pass-through water squeezer is 8MPa-10MPa, and the speed is 6m / min to 8m / min, the leather body is required to be flat and wrinkle-free;

[0034] (2) Wet shock: the stretched and squeezed skin embryo is transported to the wet shaker by the conveyor belt for wet shock, the wet shock pressure is 4MPa, and the speed is 10m / min;

[0035] (3) Vacuum drying: Lay it into a vacuum machine by an automatic skinning machine for vacuum drying, the vacuum drying temperature is 55°C, and the time is 250s;

[0036] (4) Stretch board drying: use 150 automatic rotating stretcher machines for stretch board drying, the stretch board drying temperature is 40° C., and the humidity is 35%.

[0037] ...

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PUM

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Abstract

The invention discloses a drying process of a chromium-free tanning skin blank. The drying process comprises the following steps: (1) stretching and water squeezing, specifically, after the chromium-free tanning skin blank is dyed and bulged, stretching and water squeezing are carried out by using a through type water squeezing machine; (2) wet oscillation, specifically, the skin blank subjected to stretching and water squeezing is conveyed into a wet oscillation machine by a conveying belt to be subjected to wet oscillation; (3) vacuum drying, specifically, the skin blank is paved into a vacuum machine by an automatic skin paving machine to be subjected to vacuum drying; and (4) toggling drying, specifically, toggling drying is carried out by using a 150-door automatic rotary toggling machine. According to the drying process, a two-step drying method of vacuum drying and toggling drying is adopted, so that the drying efficiency of the chromium-free tanning skin blank is improved, andthe dried chromium-free tanning skin blank has the advantage of low loose surface rate, and the drying process can be used for drying the chromium-free tanning skin blank with a larger size specification. The chromium-free tanning skin blank is subjected to wet oscillation before vacuum drying, so that the grain surface of the chromium-free tanning skin blank is more flat, and the skin body is compact and full.

Description

technical field [0001] The invention relates to the field of leather processing and manufacturing, in particular to a drying process for chrome-free tanned leather embryos. Background technique [0002] Chrome-free tanned leather is favored by more and more consumers because it does not contain heavy metal chromium, has low environmental pollution, and has excellent performance. The chrome-free tanned leather embryo is a semi-finished product in the process of producing chrome-free tanned leather. After the chrome-free tanned leather embryo is dyed and drummed, the chrome-free tanned leather embryo needs to be dried. The way of drying treatment directly affects the feel, texture and quality of leather. In the manufacturing process of chrome-free tanned leather, it is necessary to reduce the moisture content of the leather from 60%-75% to below 10% after wet processing. In the prior art, the drying process of chrome-free tanned leather embryos is to squeeze water first, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14B1/58
CPCC14B1/58
Inventor 庄君新刘贤军席笑博
Owner LIAONING FUXIN NEW MATERIAL CO LTD
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