CN1079003A

CN1079003A - The production method of elastic goat soft leather

Info

Publication number: CN1079003A
Application number: CN 93105377
Authority: CN
Inventors: 师昌友; 杨永祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-06
Filing date: 1993-05-06
Publication date: 1993-12-01

Abstract

The invention discloses a kind of production method of elastic goat soft leather, present method is except that increase light oil is tanned before the chrome tanning, other operation is identical with ordinary method, but group skin, deliming, pickling, chrome tanning, filling are added ester, and the covering with paint operation has new implementation method, the elastic goat soft leather good hand feeling of making of present method is comfortable, the grain exquisiteness, high resilience, not loose side broken face, whole skin uniformity, the utilization ratio height.

Description

The production method of elastic goat soft leather

The present invention relates to method for leather-making, particularly the production method of elastic goat soft leather.

The conventional production method of goat soft leather adds ester technology by grey alkali pretreatment, process for tanning, filling and finishing process is formed.Wherein grey alkali pretreatment by group skin, pond immersion, fleshing, ease back, lose hair or feathers, change alkali, liming, dedust meat, deliming, the operation of softening, wash one's face and form, process for tanning is made up of pickling, chrome tanning, shaving, retanning, neutralization, dyeing process.Filling adds ester technology and is made up of the interior filling for the first time of drum, the outer filling of drum, the interior filling work procedure for the second time of drum.Finishing process is made up of pasting board, airing, moisture regain, perching, toggling, hot iron, covering with paint, fixing, hot iron, dipping, classification warehouse-in operation.The goat soft leather that conventional production method is produced can not guarantee its good hand feeling, has much room for improvement aspect quality.

The objective of the invention is to provide a kind of production method of elastic goat soft leather.

Before explanation technical scheme of the present invention, earlier the industrial chemicals code name in this specification sheets is described:

J ₁The vinylformic acid potting resin emulsion that-4 Beijing leather companies produce

The synthetic tanning agent that KS-1 Kaifeng resin processing plant produces

The synthetic tanning agent that PFB Tianjin leather chemical industry factory produces

BMR Jiangsu is the synthetic tanning agent of logical sequence leather chemical industry factory product too

BS ₂The synthetic tanning agent that Tianjin leather chemical industry factory produces

The synthetic tanning agent that OES Tianjin leather chemical industry factory produces

The resin emulsion that KS-2-25 Kaifeng resin processing plant produces

The resin emulsion that KS-2-29 Kaifeng resin processing plant produces

The production method of elastic goat soft leather still adds ester technology by grey alkali pretreatment, process for tanning, filling and finishing process is formed, and just the method for some concrete operation enforcement changes to some extent.Specify as follows:

Group skin operation in the ash alkali pretreatment need be selected the high-quality goatskin for use, particularly selects winter, no invalid thin goatskin for use; In the deliming operation, adopt the ammonium sulfate deliming.Other operation is with conventional identical.

Pickling procedure in the process for tanning adopts quick pickling, finishes in 50-60 minute, increases the alum (the relative tare weight of per-cent number, as follows) of 1-1.5% in the immersion liquid, and pH value is controlled at 2.5-3.In drum, add the ester agent before the chrome tanning process in the process for tanning and carry out 20-30 minute light oil and tan, with assurance skin product grain exquisiteness with 1.5% positively charged ion.Chrome tanning in the centre of chrome tanning process operation, promptly adds high blue liquid rotation and attaches 2%BS after 88-92 minute then ₂Changeed 28-32 minute, and added the sodium-acetate of 0.6-0.8%, changeed 28-32 minute, survey pH value then, requiring pH value is 3.8-4.Down carry out then.Add BS ₂Purpose be to increase the intensity that hide fiber forms.Other operation is with conventional identical.

The implementation method that filling adds the drum interior first time of the filling work procedure in the ester technology is: liquor ratio is adjusted to 1: 1 in the drum, and temperature is adjusted to 36 °-40 ℃, from a drum adding 3%BS ₂With the 1%OES mixed solution, changeed 15 minutes, add 3.5%BMR, changeed 8-12 minute, add sodium-acetate, changeed 8-12 minute, add 2%J ₁-4,1%KS-1 and 0.1% permeate agent, three kinds of raw materials are made mixed solution and are once added, and change 28-32 minute, add 3%PFB, change 38-42 minute, go out drum control water and water squeezing.The implementation method of the outer filling work procedure of drum is with 1 part of KS-1,1.5 parts of J ₁-4,0.2 parts of permeate agents, 2 parts of water are made the outer stopping composition of drum, on the limit of cladding, each position brush of bank, abdomen twice, then with in the cladding--the flat relatively sign indicating number in lining left standstill 10-12 hour, the interior implementation method that adds the ester operation of filling for the second time of drum is to wash slightly through the water in drum of the cladding after filling outside the drum, and temperature is adjusted to 48 °-52 ℃ in will rousing, and liquor ratio is adjusted to 1: 1, begin to rotate, add 0.5% bicarbonate of ammonia from the drum eye, changeed 13-17 minute, add 1% OES solution.Changeed 48-52 minute, and added cold water and be cooled to 38 °-42 ℃, add 2.5% shaddock mandarin orange tannin extract and 1%PFB mixed solution, changeed 38-42 minute, add 0.4% acetic acid, changeed 28-32 minute, add 1% positively charged ion and add the ester agent, changeed 28-32 minute, add water and slightly wash out drum.

The implementation method that is coated with slurry process in the finishing process is that the casein finiss that adopts KS-2-25 and KS-2-29 resin emulsion and Shanghai Xinhua leather chemical industry factory to produce carries out pasting, and other operation is with conventional identical.

The elastic goat soft leather that adopts the present invention to produce is light and soft comfortable, soft and not loose, high resilience, and loose side broken face not, the grain exquisiteness, pore is clear, and good hand feeling is comfortable, gloss and profit nature, whole skin uniformity, utilization ratio height.

The contriver has been 30,000 square chi embodiment, and present embodiment is in when operation, temperature, time, add the centre that relevant industrial chemicals is controlled at the scope of giving.Product is subjected to parties concerned's favorable comment, and by countries such as Beijing Dong Lian business corporation outlet U.S..

Claims

1, the production method of elastic goat soft leather, by grey alkali pretreatment, process for tanning, filling adds ester technology, finishing process is formed, wherein grey alkali pretreatment is by the group skin, the pond immersion, fleshing, ease back, depilation, change alkali, liming, dedust meat, deliming, softening, the operation of washing one's face is formed, process for tanning is by pickling, chrome tanning, shaving, retanning, neutralization, dyeing process is formed, filling adds ester technology by filling for the first time in the drum, drum is outer fills, fill for the second time in the drum and add ester operation composition, finishing process is by pasting board, airing, moisture regain, perching, toggling, hot iron, pasting, fixing, hot iron, dipping, classification warehouse-in operation is formed, and the invention is characterized in:

Group skin operation in a, the grey alkali pretreatment is selected the high-quality goatskin for use,

Deliming operation in b, the grey alkali pretreatment adopts the ammonium sulfate deliming,

Pickling procedure in c, the process for tanning was finished in 50-60 minute, increased the alum of tare weight 1-1.5% (percentage ratio for tare weight, as follows) in the immersion liquid, and pH value is controlled at 2.5-3,

Before chrome tanning process, in drum, add the ester agent and carry out 20-30 minute light oil and tan in d, the process for tanning with 1.5% positively charged ion,

E, in the centre of process for tanning chrome tanning process operation, promptly add and attach the 2%BS that Tianjin leather chemical industry factory produces after high blue liquid rotates 80-90 minute ₂, rotated 28-32 minute, adding the 0.6-0.8% sodium-acetate changeed 28-32 minute, surveyed pH value and should reach 3.8-4, down carry out then,

F, fill in the drum add in the ester technology for the first time that the filling work procedure implementation method is: liquor ratio is adjusted to 1: 1 in the drum, and temperature is adjusted to 36 °-40 ℃, 3% the BS that adds that Tianjin leather chemical industry factory produces from the drum eye ₂With the 1%OES mixed solution, changeed 15 minutes, add too 3.5% the BMR synthetic tanning agent that produces of logical sequence leather chemical industry factory of Jiangsu, changeed 8-12 minute, add sodium-acetate, changeed 8-12 minute, add the 2%J of Beijing leather company product ₁-4, the 1%KS-1 and the 0.1% permeate agent mixed solution of Kaifeng resin processing plant product changeed 28-32 minute, added the 3%PFB that Tianjin leather chemical industry factory produces, and changeed 38-42 minute, went out drum control water,

The implementation method that g, filling add the outer filling work procedure of drum in the ester technology is: with the KS-1 of 1 part of Kaifeng resin processing plant product, 1.5 parts of J that Beijing leather company produces ₁-4,0.2 parts of permeate agents, 2 parts of water are made the outer stopping composition of drum, brush on the limit of cladding, each position of bank, abdomen, each position brush twice, then with in the cladding-lining left standstill 10-12 hour for flat relatively yard,

H, the interior implementation method that adds the ester operation of filling for the second time of drum that filling adds in the ester technology is: the water in rousing of the cladding after filling outside will rousing is washed slightly, temperature is adjusted to 48 °-52 ℃ in will rousing, liquor ratio is adjusted to 1: 1, begin to rotate, add 0.5% sodium bicarbonate from the drum eye, changeed 13-17 minute, add the 1%OES solution that Tianjin leather chemical industry factory produces, changeed 48-52 minute, add cold water and cool to 38 °-42 ℃, add the 1%PFB mixed solution that 2.5% shaddock mandarin orange tannin extract and Tianjin leather chemical industry factory produce, changeed 38-42 minute, add 0.4% acetic acid, changeed 28-32 minute, and added 1% positively charged ion and add the ester agent, changeed 28-32 minute, add water and slightly wash out drum

The implementation method that is coated with slurry process in i, the finishing process is to adopt the KS-2-25 of Kaifeng resin processing plant product and the casein finiss of KS-2-29 resin emulsion and Shanghai Xinhua leather chemical industry factory product to carry out pasting.