CN100381580C

CN100381580C - Shaped tanning method of leather

Info

Publication number: CN100381580C
Application number: CNB2005100933315A
Authority: CN
Inventors: 杨承杰; 陈杰; 贾继章; 宋昕
Original assignee: China Leather and Footwear Research Institute Co Ltd
Current assignee: China Leather and Footwear Research Institute Co Ltd
Priority date: 2005-08-26
Filing date: 2005-08-26
Publication date: 2008-04-16
Anticipated expiration: 2025-08-26
Also published as: CN1920058A

Abstract

The invention relates the leather shaped tanning method, comprising the following steps: using hogskin, cowhide and goatskin as raw materials, treating them, making the grain of the skins adhibit to the metal plate or mechanically resistant material plate, scraping the flesh side with scratch board, on the flesh side putting the material which can make tanning liquor flow, on the material putting metal plate or mechanically resistant material plate, forcing on the plate, putting them into tanning liquor, making them move, heating, and getting the product.

Description

The shaped tanning method of leather

Technical field

The present invention relates to the leather industry production technical field, specially refer to the shaped tanning method of leather.

Background technology

The rotary drum tanning is generally adopted in the tanning of leather at present.Its process is to rotate together putting in the rotary drum through the pelt after preparatory process are handled before a series of the tanning and owse, plays the effect of stirring pelt and owse by the rotation of rotary drum, and makes pelt be subjected to a certain degree mechanical effect, thus the tannery of finishing.Because of in the rotation process of rotary drum, mechanical deformations such as pelt constantly stretches, pushes, bending, and also to produce a large amount of frictions between skin and the skin, all these act on and promote owse when intracutaneous portion permeates, inevitably the fiber of skin is caused to a certain degree damage, the grain that is embodied in tanning and finishes the back leather slightly, position loose side such as limit the part between the ribs and the hips etc.In the process of tanning, hide fiber combines with tanning agent, and leather is thickened, remove from office with tan before pelt mutually specific area obviously dwindle, cause yield of leather to reduce, economic benefit descends.Hide fiber is fixed by the tanning agent in the owse, make the grain of leather present the graining of nature, if exist on the raw hide draw stab, during defective such as fertile wrinkle and sick insect bite evil, these defectives can be fixed in the surface of leather, cause the grade of finished leather to descend, even these defectives can remedy by methods such as embossing, recoat decorations, but economic benefit is descended.

Summary of the invention:

The object of the invention: the shaped tanning method of the leather that is to provide new.Present method, with pigskin, ox-hide or sheepskin is main raw material, handle through preparatory process before the tanning, when tanning, the grain of sour skin is attached to and has decorative pattern or the light face does not have on the metal sheet or other hard laminates of decorative pattern, sour skin is pushed out with scraper plate or other instruments, apply and keep certain pressure.The tanning under this state of acid skin, the tanning agent in the owse is fixed hide fiber, can increase the yield of leather of leather greatly.The grain of institute's tanning is flat carefully, thickness is even, and finished leather has higher tensile strength, tear strength and lower elongation.The leather of present method tanning, employed owse is easy to recycle, can save chemical materials, reduces the pollution of chemical materials to environment.

To achieve these goals, the present invention relies on following technical proposals to realize:

The shaped tanning method of leather, with pigskin, ox-hide or sheepskin are main raw material, with its process immersion, depilation, liming, deliming, the preceding preparatory process of softening and pickled leather tanning is handled, it is characterized in that: the grain of sour skin is attached to the surface has the sheepskin decorative pattern, ox-hide decorative pattern or other decorative patterns or light face do not have on the metal sheet or other hard laminates of decorative pattern, firmly push the flesh noodles of sour skin with scraper plate or other instruments, the area of sour skin is fully expanded, and its grain is tightly sticked on have above-mentioned decorative pattern or the light face does not have on the metal sheet or other hard laminates of decorative pattern, then, on the flesh noodles of sour skin, place hole from thin to thick multi-layer silk screen, non-essential also the placement makes owse pass through its free-pouring material, at silk screen or make owse put a metal sheet or other hard laminates above the free flow material again by it, two metal sheets or other hard laminates are clipped in the middle sour skin and silk screen and the non-essential above-mentioned owse that makes by its free-pouring material, apply and keep certain pressure, put among the owse, adopt and extract owse with pump, methods such as stirring and/or vibration owse make and produce relative movement between owse and metal sheet or other hard laminates; Metal sheet or other hard laminates are moved and owse is motionless or metal sheet or other hard laminates and owse all move, thereby produce the relative movement between owse and metal sheet or other hard laminates, make owse from the space of skin limit portion, silk screen or other materials, fully be penetrated into the inside of skin, through carrying alkali and operation sequence such as heat, promptly finish the process for tanning process again.

Described process for tanning process, be that sour skin grain is attached on the stainless steel plate that has the ox-hide decorative pattern, with scraper plate firmly to around push away sour skin and flesh face, make sour skin tightly be attached on the stainless steel plate, place four holes at sour skin and flesh face and be respectively 60 orders, 40 orders, 25 orders and 10 purpose Stainless Steel Cloths to thick Stainless Steel Cloth, be pressed on the above-mentioned silk screen with another stainless steel plate from thin, apply the pressure of 500---30000Pa, optimum pressure can be preferably 4000--10000Pa.

Described process for tanning process, be in a stainless steel tank that has a vibrating device, to put into normal-temperature water, the water yield was not advisable just to have coarctate steel plate, add salt, make degree Beaume reach 7-8Be °, add formic acid and transfer PH between 2.5-2.8, coarctate steel plate is put into water, add chromium powder, make Cr in the owse ₂O ₃Content be 2-4g/l, vibrate stainless steel tank, make between owse and the steel plate and produce relative movement, vibration velocity 60-100 time/minute, best vibration velocity is preferably 80--90 time/minute, vibrate after 6 hours, add sodium-acetate 7--8g/l, vibrate 5 hours, with sodium bicarbonate owse PH is adjusted into 3.8--4.2, vibrate 5 hours, heat to the owse temperature to 30-45 degree centigrade, optimum temps can be preferably the 38-40 degree, vibrate 6 hours, finish tanning, total tanning time was controlled at 10-24 hour, and Best Times can be preferably 20-24 hour.

Described is main raw material with pigskin or ox-hide or sheepskin, can also be raw material with donkey hide, horse skin or deerskin.

Advantage of the present invention and positively effect:

Present method has increased the area of sour skin greatly owing to when tanning begins sour skin is pushed out with scraper plate or other instruments, tanning under this state, and the tanning agent in the owse is fixed hide fiber, can increase the yield of leather of leather greatly.This processing method is attached to the grain of sour skin and has sheepskin decorative pattern or ox-hide decorative pattern or other decorative patterns or light face and do not have on the metal sheet or other hard laminates of decorative pattern, apply and keep certain pressure, under pressure, decorative pattern on metal sheet or other hard laminates is imprinted on the grain of sour skin, hide fiber is fixed by tanning agent in this state, when finishing, tanning will keep the decorative pattern on metal sheet or other hard laminates on the leather surface, this decorative pattern can forever keep, and can not disappear because of the sequence of operations after tanning.Use present method to produce high-grade leather (graining that presents ox-hide as the grain that can make pigskin), maybe can make the grain of leather present special decorative pattern (as fish-skin line, crocodile dermatoglyph etc.), improve the class of leather greatly with some low-grade raw hides.

The grain of use present method institute tanning is flat carefully, thickness is even, and finished leather has higher tensile strength, tear strength and lower elongation.Use present method tan leather, employed owse is easy to recycle, can save chemical materials, reduces the pollution of chemical materials to environment.

Embodiment

The shaped tanning method of leather is a main raw material with pigskin, ox-hide or sheepskin, through immersion, depilation, liming, deliming, the softening and preceding preparatory process processing of pickled leather tanning.

Below provide two embodiment:

Embodiment 1, has the typing chrome tanning of the lining leather of pigskin shoes of ox-hide decorative pattern:

(1) pigskin acid skin grain is attached on the stainless steel plate that has the ox-hide decorative pattern, with scraper plate firmly to around push away sour skin and flesh face, make sour skin tightly be attached on the stainless steel plate, the long-pending 20%--25% that increases approximately of sour surface this moment, place four at sour skin and flesh face and be respectively 60 orders, 40 orders, 25 orders and 10 purpose Stainless Steel Cloths, be pressed on the silk screen with another stainless steel plate, apply the pressure of 6000Pa;

(2) put into normal-temperature water in a stainless steel tank that has a vibrating device, the water yield was not advisable just to have coarctate steel plate, added salt, make degree Beaume reach 8Be °, add formic acid and transfer PH, coarctate steel plate is put into water 2.7, add chromium powder, make Cr in the owse ₂O ₃Content be 3.5g/l, vibrate stainless steel tank, make between owse and the steel plate and produce relative movement, vibration velocity 80 times/minute, vibrate after 5 hours, add sodium-acetate 7g/l, vibrate 5 hours, owse PH is adjusted into 4.1 with sodium bicarbonate, vibrate 5 hours, heat to owse temperature to 40 degree centigrade, vibrate 6 hours, promptly finish the process for tanning process.

Embodiment 2, utilize low-grade surface to have and draw the typing chrome tanning that the ox-hide of stabbing is produced high-grade ox-hide sofa artificial leather:

(1) low-grade surface being had stroke ox-hide of stabbing an acid skin grain is attached on the stainless steel plate that has the ox-hide decorative pattern, with scraper plate firmly to around push away sour skin and flesh face, make sour skin tightly be attached on the stainless steel plate, the long-pending 10%-15% that increases approximately of sour surface this moment, place four at sour skin and flesh face and be respectively 80 orders, 60 orders, 25 orders and 5 purpose Stainless Steel Cloths, be pressed on the silk screen with another stainless steel plate, apply the pressure of 5000Pa;

(2) put into normal-temperature water in a stainless steel tank that has a vibrating device, the water yield was not advisable just to have coarctate steel plate, added salt, make degree Beaume reach 7Be °, add formic acid and transfer PH, coarctate steel plate is put into water 2.5, add chromium powder, make Cr in the owse ₂O ₃Content be 3.5g/l, vibrate stainless steel tank, make between owse and the steel plate and produce relative movement, vibration velocity 85 times/minute, vibrate after 6 hours, add sodium-acetate 7g/l, vibrate 6 hours, owse PH is adjusted into 4.0 with sodium bicarbonate, vibrate 5 hours, heat to owse temperature to 40 degree centigrade, vibrate 6 hours, promptly finish the process for tanning process.

The present invention is in the technological process of tanning, and used component and material are commercial prod.

The present invention has novelty, and practicality meets each important document of patent of invention, so propose application for a patent for invention in accordance with the law.

Claims

1. the shaped tanning method of leather, with pigskin, ox-hide or sheepskin are main raw material, with its process immersion, depilation, liming, deliming, the preceding preparatory process of softening and pickled leather tanning is handled, it is characterized in that: the grain of sour skin is attached to the surface has the sheepskin decorative pattern, ox-hide decorative pattern or other decorative patterns or light face do not have on the metal sheet or other hard laminates of decorative pattern, firmly push the flesh noodles of sour skin with scraper plate or other instruments, the area of sour skin is fully expanded, and its grain is tightly sticked on have above-mentioned decorative pattern or the light face does not have on the metal sheet or other hard laminates of decorative pattern, then, on the flesh noodles of sour skin, place hole from thin to thick multi-layer silk screen, non-essential also the placement makes owse pass through its free-pouring material, at silk screen or make owse put a metal sheet or other hard laminates above the free flow material again by it, two metal sheets or other hard laminates are clipped in the middle sour skin and silk screen and the non-essential above-mentioned owse that makes by its free-pouring material, apply and keep certain pressure, put among the owse, adopt and extract owse with pump, the method of stirring and/or vibration owse makes between owse and metal sheet or other hard laminates and produces relative movement; Metal sheet or other hard laminates are moved and owse is motionless or metal sheet or other hard laminates and owse all move, thereby produce the relative movement between owse and metal sheet or other hard laminates, make owse from the space of skin limit portion, silk screen or other materials, fully be penetrated into the inside of skin, operation sequence through carrying alkali and heating is promptly finished the process for tanning process again.

2. the shaped tanning method of leather according to claim 1, it is characterized in that: described process for tanning process, be that sour skin grain is attached on the stainless steel plate that has the ox-hide decorative pattern, with scraper plate firmly to around push away sour skin and flesh face, make sour skin tightly be attached on the stainless steel plate, sour skin and flesh face place four holes from thin to thick Stainless Steel Cloth, be respectively 60 orders, 40 orders, 25 orders and 10 purpose Stainless Steel Cloths, be pressed on the above-mentioned silk screen with another stainless steel plate, apply the pressure of 500---30000Pa.

3. the shaped tanning method of leather according to claim 1, it is characterized in that: described process for tanning process, be in a stainless steel tank that has a vibrating device, to put into normal-temperature water, the water yield was not advisable just to have coarctate steel plate, added salt, made degree Beaume reach 7-8Be °, adding formic acid transfers PH between 2.5-2.8, coarctate steel plate is put into water, add chromium powder, make Cr in the owse ₂O ₃Content be 2-4g/l, vibrate stainless steel tank, make between owse and the steel plate and produce relative movement, vibration velocity 60-100 time/minute, vibrate after 6 hours, add sodium-acetate 7--8g/l, vibrate 5 hours, with sodium bicarbonate owse PH is adjusted into 3.8---4.2, vibrate 5 hours, heat to the owse temperature to 30-45 degree centigrade, vibrate 6 hours, finish tanning, total tanning time was controlled at 10-24 hour.

4. the shaped tanning method of leather according to claim 1 is characterized in that: replacing pigskin, ox-hide or sheepskin with donkey hide, horse skin or deerskin is main raw material.