CN104593527A

CN104593527A - Crocodile belly skin tanning processing method

Info

Publication number: CN104593527A
Application number: CN201510042823.5A
Authority: CN
Inventors: 强涛涛; 高鑫; 李小宁; 张婷; 王学川
Original assignee: Shaanxi University of Science and Technology
Current assignee: Anhui Hanbang Technology Consulting Co ltd; Bengbu Qibang Science And Technology Information Consulting Co ltd
Priority date: 2015-01-28
Filing date: 2015-01-28
Publication date: 2015-05-06
Anticipated expiration: 2035-01-28
Also published as: CN104593527B

Abstract

The invention relates to a crocodile belly skin tanning processing method. The problems that fats are difficult to remove, dermatome and oracle bone are difficult to soften, scales and shells are difficult to remove, bleaching and fading effects are not good, the finished leather is flat, thin, empty and loose, and the hang drying method is improper and the like are unsolved in the existing crocodile skin tanning technology. The crocodile belly skin tanning processing method comprises the steps of soaking, fleshing, oil film scraping, degreasing and pre-liming, oil film scraping, aldehyde pre-tanning, oil film scraping, liming, oil film scraping, scale brushing, deliming, oil film scraping, united bleaching, softening, oil film scraping, combined bleaching, degreasing, oracle bond softening and bleaching, pickling and softening, tanning, shaving, degreasing, neutralizing, re-tanning, fat-liquoring, leather fluffing, dry cleaning, dyeing, hang drying and coating. The processing technology of Nile crocodile belly raw material skin is provided, and the crocodile skin is soft and plump and elastic, keeps the complete crocodile skin patterns, not only can be processed into dark leather, but also can be processed into light leather and white leather. The leather can be used for processing luggage leather, shoe leather, belt and watch strap leather and the like, and has a very high market value.

Description

Crocodile belly leather working method

Technical field

the invention belongs to extraordinary leather processing technique field, be specifically related to a kind of crocodile belly leather working method.

Background technology

In recent years, the consumption of the medium-to-high grade real leather products of China becomes world's new highlight, and foreign brand name enters China one after another, seizes market.Crocodile skin goods, as the bellwether of top grade leather goods circle, are subject to pursuing of each side especially.But China is no matter from cultivation or the crocodile skin goods brand building aspect of crocodile, and all start late, popularity, reputation are low, and market does not also have a collection of generally acknowledged brand at home, and this grasps ripe tanning technology in the urgent need to us, set up independent brand.In the actual production process of crocodile skin, also have many technological difficulties Gonna breakthroughs, simultaneously must " see that skin does skin ", the difference such as size, thickness according to crocodile skin formulates different technique, especially liming, bleaching, soften, tanning, retanning, in the important procedure such as dry-cleaning.

Existing reported crocodile skin tanning technology is little, the one-tenth maturity processing technique that can be used for actual production of rarely independent development, which greatly limits growth and the development of China's special-leather processing.The data of literatures, patent etc. of crocodile cultivation and crocodile skin process hides are also little, and only data is also detailed not to the explanation of process hides whole process, and a lot of operation also exists a lot of defect.Such as, some articles describe the whole wet course of processing of crocodile skin, some explanations have been done from aspects such as weave construction, mechanical effect, liming alkali, tanning, ornamentings, but concrete operations are the complete processing continuing to use ox-hide, pigskin, sheepskin a bit, innovative, exploitativeness is poor, is difficult to use in scale operation.Some patents also describe the method for leather-making of some novelties, and such as enzyme process removes scale, organic phosphine chrome-free tanning leather etc., and the author thinks that these all exist certain defect.The application parameter of enzyme is difficult to control, complicated component, large to the damage of hide fiber, and rarely has major company to develop some extraordinary enzymes, and cost is higher; Organic phosphine chrome-free tanning finished leather shrinkage temperature is too low, and Free-formaldehyde in Leather content overproof.

Summary of the invention

The object of this invention is to provide a kind of crocodile belly leather working method that can be used for actual batch production, to overcome in the crocodile skin process hides course of processing that fat removes difficulty, dermatotome is difficult to bone first to soften, bone first is connected with dermatotome that loose, scale and shell is difficult to remove, the flat thin sky of bleaching decolourization poor effect, finished leather is loose, hang the problems such as method of drying in the air is improper.

The technical solution adopted in the present invention is:

Crocodile belly leather working method, is characterized in that:

Comprise the following steps:

Immersion → fleshing → scrape oil film → degreasing, pre-liming → scrape oil film → aldehyde pretan → scrape oil film → liming → scrape oil film → brush squama → deliming → scrape oil film → united bleaching → soften → scrape oil film → united bleaching → degreasing → softening first bone, bleaching → pickling, soften → tanning → shaving → degreasing → neutralization → retanning → stuffing → buffing → dry-cleaning → dyeing → extension dries in the air → covers with paint, lacquer, colour wash, etc.;

In each operation the consumption of chemical materials with crocodile skin quality for benchmark;

Concrete process is as follows:

Soaking process: liquor ratio is 150% ~ 500%, temperature is 20 ~ 35 DEG C, and grease-removing agent consumption is 2% ~ 6%, and sterilant consumption is 0.3% ~ 1%, and Soaking consumption is 1% ~ 4%, and wetting agent consumption is 0.3% ~ 3%, leaves standstill 12 ~ 24h after washing;

Fleshing operation: take handle type fleshing machine fleshing after immersion, extruding rotates, according to position different appropriate regulation fleshing intensity;

Degreasing, preimpregnation ash process: liquor ratio is 150% ~ 500%, temperature is 30 ~ 35 DEG C, and grease-removing agent consumption is 2% ~ 6%, and sterilant consumption is 0.3% ~ 1%, and permeate agent consumption is 1% ~ 3%; Add the pre-liming of Sodium Sulphide, consumption is 0.5% ~ 3% simultaneously, leaves standstill 12 ~ 24h after washing;

Frizing membrane process: the oil film scraping off flesh noodles with blunt knife, brush, destroys intracutaneous adipocyte and scrapes and extrude grease;

Aldehyde pretan operation: liquor ratio is 150% ~ 500%, temperature is normal temperature, and aldehyde consumption is 0.5% ~ 5%, and grease-removing agent consumption is 1% ~ 4%, leaves standstill 2 ~ 5h after washing;

Liming operation: liquor ratio is 150% ~ 500%, temperature is normal temperature, and grease-removing agent consumption is 2% ~ 6%, and auxiliary liming agent consumption is 1% ~ 3%, leaves standstill 30 ~ 60min; Add lime powder 6% ~ 8%, permeate agent 1% ~ 3%, leave standstill 30 ~ 60min; Add Sodium sulfhydrate 1% ~ 3%, sodium sulphite 3% ~ 8%, after leaving standstill 40 ~ 80h, discharge opeing is washed;

Brush squama operation: crocodile skin fold is more, uses medium hardness hairbrush, brushes off the scale that edge does not come off;

Deliming operation: liquor ratio is 150% ~ 500%, leave standstill 1.5 ~ 4h, temperature is normal temperature, and grease-removing agent consumption is 1% ~ 3%, permeate agent consumption is 0.5% ~ 2%, and deliming auxiliary dosage is 0.5% ~ 2%, and ammonium sulfate consumption is 3% ~ 8%, leave standstill 10 ~ 30h, regulate pH to be 7.5 ~ 8.0, complete after washing;

United bleaching operation: adopt the mode of oxidation bleaching and reduction bleaching associating to strengthen bleaching effect, liquor ratio is 150% ~ 500%;

During oxidation bleaching, add oxygenant, consumption is 10% ~ 40%, adds at twice, and interval 4 ~ 10h, fully washes;

During reduction bleaching, add reductive agent, consumption is 1% ~ 5%, leaves standstill 2 ~ 10h after washing;

Softening process: liquor ratio is 100% ~ 400%, temperature is 35 ~ 40 DEG C, and grease-removing agent consumption is 1% ~ 5%, soda ash consumption is 0.3% ~ 2%, and pancreatin consumption is 1% ~ 3%, allows enzyme permeate 2 ~ 8h at normal temperatures, be warming up to 35 ~ 40 DEG C again, softening 2 ~ 8h, hold over night after washing;

Degreasing process: liquor ratio is 100% ~ 400%, temperature is 30 ~ 35 DEG C, and grease-removing agent consumption is 1% ~ 5%, and soda ash consumption is 0.3% ~ 2%, and permeate agent consumption is 1% ~ 3%, leaves standstill 4 ~ 10h after washing;

Softening first bone, bleaching process: liquor ratio is 100% ~ 400%, salt consumption is 15% ~ 40%, infiltration 10 ~ 30min, grease-removing agent consumption is 1% ~ 5%, and the consumption of acid is 0.5% ~ 3%, and clorox consumption is 1% ~ 5%, sodium pyrosulfate consumption is 2% ~ 5%, reductive agent consumption is 0.5% ~ 4%, within every two days, adds the acid of 0.5% ~ 3%, clorox, sodium pyrosulfate and reductive agent, leaves standstill and changes liquid washing after 4 ~ 12 days;

Pickling, softening process: liquor ratio is 100% ~ 400%, salt consumption is 15% ~ 30%, infiltration 10 ~ 30min, and the consumption of acid is 0.1% ~ 3%, and regulate pH to be 2.2 ~ 3.0, macerating enzyme consumption is 0.5% ~ 3%, leaves standstill 20 ~ 30h;

Tanning processes: carry out in pickling liquid, liquor ratio is 100% ~ 200%, and formic acid consumption is 0.5% ~ 3%, regulates pH to be 2.2 ~ 2.8, and leave standstill 30min, chromium powder consumption is 5% ~ 10%, and leave standstill 10 ~ 24h, masking agent consumption is 1% ~ 3%, turns and stops in conjunction with 20 ~ 40h; Temperature is adjusted to 35 ~ 40 DEG C, and gradation adds alkali and regulates pH to be 3.8 ~ 4.0, every minor tick 4 ~ 6h, and total time is 20 ~ 48h, hold over night, goes out drum and takes horse 20 ~ 24h;

Shaving operation: look product requirement, accurate adjustment Hide thickness, weighs after shaving;

Degreasing process: liquor ratio is 100% ~ 300%, temperature is 30 ~ 35 DEG C, and grease-removing agent consumption is 1% ~ 6%, leaves standstill 10 ~ 24h after washing;

In and operation: liquor ratio is 100% ~ 200%, and temperature is 35 ~ 40 DEG C, and neutralizing agent consumption is 2% ~ 6%, and alkali consumption is 0.5% ~ 3%, gradation regulate pH be 5.5 ~ 6.5, leave standstill 10 ~ 20h, change liquid washing;

Retanning procedures: liquor ratio is 100% ~ 200%, temperature is 35 ~ 40 DEG C, and retanning agent consumption is 3% ~ 6%, and synthetic fat liquor consumption is 1% ~ 4%, and tannin extract consumption is 3% ~ 8%, turns and stops in conjunction with 10 ~ 24h, washing 30min;

Stuffing operation: liquor ratio is 100% ~ 200%, temperature is 40 ~ 50 DEG C, and dispersant dosage is 1% ~ 3%, and synthetic fat liquor consumption is 5% ~ 10%, and animal fatting agent consumption is 5% ~ 10%, turns and stops in conjunction with 10 ~ 24h, washing 30min;

Buffing operation: look product requirement, accurate adjustment Hide thickness, adopts monkey buffing machine to carry out fluffing;

Dry-cleaning operation: using zellon, D-60 petroleum solvent as dry cleaning composition, dry-cleaning 10 ~ 30min, dries 10 ~ 30min, dries;

Dyeing process: liquor ratio is 100% ~ 200%, temperature is 40 ~ 50 DEG C, and dye dosage is 1% ~ 5%, turns and stops in conjunction with 10 ~ 30h, check otch, add the formic acid of 0.5% ~ 1.5% after even dyeing, gradation adds, every minor tick 30min, pH is adjusted to be 3.5 ~ 4.0, fix 2 ~ 6h, washing 30min, leaves standstill 10 ~ 24 hours;

Extension dries in the air operation: adopt needle-like finishing nail of stapling together to carry out tacking, first fix dermatotome belly by means of nail-plate special vice, then fix initial and tail sections, skin is fully stretched.

Add the permeate agent of 1% ~ 5% in degreasing, retanning and stuffing operation, Becaltal Pic S selected by permeate agent.

In soaking process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Soaking selects Tergolix W-01-ID;

DESOAGEN WT-H selected by wetting agent;

In degreasing, preimpregnation ash process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Becaltal Pic S selected by permeate agent;

Sodium Sulphide selects sodium sulphite, Sodium sulfhydrate;

In aldehyde pretan operation:

Aldehyde selects glutaraldehyde;

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

In liming operation:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Auxiliary liming agent selects ERHAVIT MB;

Becaltal Pic S selected by permeate agent;

In deliming operation:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

Deliming selection of auxiliary CISMOLLAN BH-C;

In united bleaching operation:

Hydrogen peroxide selected by oxygenant;

Vat powder selected by reductive agent;

In softening process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Pancreatin selects OROPON OO;

In degreasing process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

In softening first bone, bleaching process:

Sodium-chlor selected by salt;

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Acid formic acid;

Vat powder selected by reductive agent;

In pickling, softening process:

Sodium-chlor selected by salt;

Acid formic acid;

Macerating enzyme selects DESOBATE TN;

In tanning processes:

The soft AB chromium powder of Turkey's strength mountain tank selected by chromium powder;

Masking agent selects DESOAGEN KP;

In degreasing process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

In and operation in:

DESOTAN NT or SELLASOL NG selected by neutralizing agent;

Alkali formic acid sodium, sodium bicarbonate;

In retanning procedures:

Retanning agent selects Tanigan HO;

Thick GLH or the Desopon LQ-5 of power selected by synthetic fat liquor;

In stuffing operation:

Dispersion agent selects BORPON SAF, Desoagen SHN;

Thick GLH or the Desopon LQ-5 of power selected by synthetic fat liquor;

Animal fatting agent selects Desopon QL or CORIPOL MK.

The present invention has the following advantages:

Complete processing provided by the present invention, adopts handle type fleshing machine fleshing, repeatedly scrapes oil film to realize thorough degreasing progressively; Adopt aldehyde pretan to strengthen the connection of dermatotome and bone first, prevent both to be separated in following process; Adopt pre-liming and carry out removal scale with liming two-step approach, scale layer can be removed completely; Increase softening first bone operation, softening leg, the first bone that belly is harder; Adopt three one-Step bleach methods first, can by skin full bleaching to white; Add synthetic tanning agent, tannin extract during retanning, solve the problems such as the flat thin empty pine of finished leather; Buffing and dry-cleaning operation is added first, accurate adjustment thickness and fat content after stuffing; Extension dries in the air in process and carries out tacking with finishing nail, can make that skin is smooth, corner loss less, improve yield of leather.

The crocodile skin of this explained hereafter is soft, plentiful, high resilience, and maintain complete crocodile skin decorative pattern, shrinkage temperature, physical and mechanical properties etc. reach every international standard completely; Dark leather can not only be processed into, light color leather and white leather can also be processed, applied range.Finished leather can be used for processing and fabricating luggage leather, footwear leather, Watch combined with leather belt belt leather etc., has very high marketable value and practical value.

Embodiment

Below in conjunction with embodiment, the present invention will be described in detail.

The present invention obtains great technological breakthrough in the operations such as fleshing shaving, liming, softening first bone, bleaching, tanning, dry-cleaning, extension dry in the air, and explores a set of leather-making technology that may be used for the actual production of Nile crocodile belly raw material skin.

Fleshing operation can remove the unnecessary meat mincing of flesh noodles, fat, and the quality of fleshing is directly connected to the success or failure of follow-up operations.The present invention adopts handle type fleshing machine fleshing, wherein handle also has the large small blade that can replace, and for opening the crocodile skin fleshing of width to difference, ensures fleshing effect while raising the efficiency, and can not cut and wear dermatotome and occur cavity.For the leg that this fold is many, concentrated small blade is needed to carry out fleshing.Remove the unnecessary meat mincing of flesh noodles, oil film during fleshing from inside to outside, and follow-up degreasing effect can be strengthened by extruding turning effort.Shaving operates in after alkali is carried in tanning and carries out, and uses the shaving machine of fur, can according to different sites accurate adjustment Hide thickness.

Liming operation can make raw material materials with hide glue fibril structure and collagen protein that suitable change occurs, collagen fiber structure is obtained loose, further removal interfibrillar substance is all right saponification grease simultaneously, further except unhairing and epidermis, for tanning and successor operation create necessary condition.Crocodile skin fiber very consolidation, dermatotome is also very thick, so strength disposal should comparatively traditional technology strengthen in the course of processing.Crocodile skin is coated with the thicker coloured scale layer of one deck, if do not removed, in post-production process, scale layer has partial exfoliation, and color also can change, have a strong impact on resultant leather quality, so scale layer should be removed by chemical material in liming process.After removing out scale layer, dermatotome color can shoal a lot, through the later stage bleaching, softening can reach very pure white degree, meet process hides demand.

Bleaching is the difficult point of crocodile skin process hides, after scale is removed in liming, still with pigment on dermatotome, does not remove and also can affect follow-up dyeing etc.No matter utilize three one-Step bleach methods to work in coordination with softening process in invention to bleach, can make the degree that dermatotome reaches completely pure white, be that making white is removed from office or light color is removed from office, dark color leather is all extraordinary starting material.

Chrome tanning is most widely used in the world at present and method that tanning effect is the most excellent, alkali formula chromic salt is combined very firm with collagen protein, thus give the plurality of advantages such as chrome tanned leather wet-heat resisting, good stability, soft and full, good moldability, for shelf-stable, unsuitable detanning.Crocodile skin dermatotome is thicker, and fiber is comparatively thick, other tanning agents existing exist infiltration more difficult, to be combined firm not, physical and mechanical properties with collagen and not reach the features such as luggage leather requirement.And chrome tanned leather can overcome above difficulty completely, shrinkage temperature (Ts) can reach more than 95 DEG C even boiling resistances, and this is that other tanning agents do not reach completely.

The grease that dry-cleaning operation is unnecessary after can effectively removing stuffing, Precise Control of Oil fat content, ensures the quantity of active group in leather, ensures higher dye uptake, avoid irregular colour one in polishing process simultaneously; Thoroughly can also clean surface, for follow-up covering with paint is ready.

Right a kind of crocodile belly leather working method involved in the present invention, specifically comprises the following steps:

Concrete process is as follows:

In above-mentioned operation, also can add the permeate agent of 1% ~ 5% in degreasing, retanning and stuffing operation, Becaltal Pic S selected by permeate agent.

In soaking process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Soaking selects Tergolix W-01-ID;

DESOAGEN WT-H selected by wetting agent;

In degreasing, preimpregnation ash process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Becaltal Pic S selected by permeate agent;

Sodium Sulphide selects sodium sulphite, Sodium sulfhydrate;

In aldehyde pretan operation:

Aldehyde selects glutaraldehyde;

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

In liming operation:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Auxiliary liming agent selects ERHAVIT MB;

Becaltal Pic S selected by permeate agent;

In deliming operation:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

Deliming selection of auxiliary CISMOLLAN BH-C;

In united bleaching operation:

Hydrogen peroxide selected by oxygenant;

Vat powder selected by reductive agent;

In softening process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Pancreatin selects OROPON OO;

In degreasing process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

In softening first bone, bleaching process:

Sodium-chlor selected by salt;

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Acid formic acid;

Vat powder selected by reductive agent;

In pickling, softening process:

Sodium-chlor selected by salt;

Acid formic acid;

Macerating enzyme selects DESOBATE TN;

In tanning processes:

Masking agent selects DESOAGEN KP;

In degreasing process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

In and operation in:

DESOTAN NT or SELLASOL NG selected by neutralizing agent;

Alkali formic acid sodium, sodium bicarbonate;

In retanning procedures:

Retanning agent selects Tanigan HO;

Thick GLH or the Desopon LQ-5 of power selected by synthetic fat liquor;

In stuffing operation:

Dispersion agent selects BORPON SAF, Desoagen SHN;

Thick GLH or the Desopon LQ-5 of power selected by synthetic fat liquor;

Animal fatting agent selects Desopon QL or CORIPOL MK.

Procedure of processing of the present invention has following distinguishing feature:

(1) in soaking process, add Soaking, grease-removing agent, sterilant, wetting agent complete immersion fast.

(2) adopt handle type fleshing machine to remove the unnecessary meat mincing of flesh noodles from inside to outside, and strengthen degreasing effect by extruding turning effort.

(3), in degreasing, pre-liming process, add Sodium Sulphide in skimming processes simultaneously and carry out pre-liming.Except the main degreasing after fleshing, in subsequent step, repeatedly add different types of grease-removing agent, adopt the method for repeatedly substep degreasing; And after multiple working procedure, add the operation of scraping oil film, fleshing, shovel flesh noodles, strengthen removing grease effect.

(4) in aldehyde pretan process, aldehyde consumption is 0.5% ~ 5%, can strengthen the connection of dermatotome and bone first, prevents both in following process because mechanical effect is separated, but also there is the effect of antisepsis and sterilization.

(5), in liming operation, first add the auxiliary liming agent of calculated amount, grease-removing agent, then add lime powder, finally add Sodium Sulphide, after for some time, complete expansion process, and remove scale layer completely.

(6) in deliming process, first add grease-removing agent, permeate agent, then add ammonium salt and deliming auxiliary agent.

(7) in bleaching process, oxygenant used needs gradation to add, and can not dye to dermatotome secondary.Reductive agent used needs the smell that can not affect crocodile skin, can effectively stop trivalent chromium to be oxidized to sexavalent chrome simultaneously.

(8) take the production technique of first bleaching post softening, after bleaching process terminates washing, regulate pH to 8 ~ 8.5 with soda ash, then add grease-removing agent, zymin.

(9) have employed softening after the technique of degreasing again, in softening process, zymin can destroy adipocyte, and again carrying out degreasing more thoroughly can remove grease.

(10) have employed the technique of softening first bone, bleaching, and carry out third time bleaching by chlorinated lime in process.It is softening that the first bone that softening first bone can make leg, belly, afterbody harder obtains to a certain extent, and loose dermatotome fiber, dermatotome can also be made to keep pure white.Add reductive agent in operation, prevention trivalent chromium oxidation is sexavalent chrome, and described reductive agent can be Sodium Pyrosulfite, vat powder, thiourea peroxide etc.

(11) have employed the technique that enzyme bating is carried out in pickling simultaneously, utilize the effect of enzyme softening dermatotome further.

(12) have employed long-time infiltration, slowly carry the chrome tanning process of alkali, chromium powder can be allowed fully to permeate evenly by masking agent, later stage slowly carries alkali can make chromium ion and dermatotome progressively be combined firmly, can not produce the raw heart, the problem that traditional chrome tanning such as to tan brings is crossed on surface.

(13), in shaving operation, fur shaving machine is used to carry out shaving, can accurate adjustment Hide thickness, do not injure crocodile skin grain and first bone parts, meet the demand of finished leather.

(14) have employed the complete processing of degreasing after chrome tanning, by adding a certain amount of grease-removing agent, thoroughly removing the grease of fiber surface, for next crucial neutralization, retanning filling work procedure are ready.

(15) in N-process, add the neutralizing agent with buffering, gentle retanning effect, there is buffering and masking effect, improve the infiltration of dyeing and evenly, while adjustment dermatotome pH, carry out certain retanning.

(16), in retanning process, synthetic tanning agent is added and tannin extract carries out retanning.In order to not make chromium too high levels in skin, under main post shrinkage temperature (Ts) of tanning is greater than the prerequisite of 90 DEG C, during retanning, use synthetic tanning agent; Because crocodile skin fiber is comparatively thick, in order to not make the flat thin empty pine of finished leather, during retanning, add tannin extract.

(17) permeate agent of 1% ~ 5% can be added in degreasing, stuffing and retanning procedures, promote the infiltration of material.

(18) have employed the mode of Fatliquoring in multi-step in stuffing operation, add dispersion agent, and good for different emulsifying properties fatting agent gradation is added, strengthen stuffing effect.

(19) have employed monkey buffing machine in buffing operation and carry out fluffing, evenly adjustment hide thickness everywhere.

(20) adopt using zellon, D-60 petroleum solvent as the mode of dry cleaning composition in dry-cleaning operation, remove unnecessary grease, and thoroughly clean surface.

(21) carry out in paddle-tumble before softening, adopt few mechanical effect; Softening process and afterwards, is transferred in rotary drum and carries out suitably to increase mechanical effect.

Embodiment 1:

Concrete process is as follows:

Soaking process: liquor ratio is 150%, temperature is 35 DEG C, and grease-removing agent consumption is 2%, and sterilant consumption is 1%, and Soaking consumption is 1%, and wetting agent consumption is 3%, leaves standstill 12h after washing;

Degreasing, preimpregnation ash process: liquor ratio is 500%, temperature is 30 DEG C, and grease-removing agent consumption is 6%, and sterilant consumption is 0.3%, and permeate agent consumption is 3%; Add the pre-liming of Sodium Sulphide, consumption is 0.5% simultaneously, leaves standstill 24h after washing;

Aldehyde pretan operation: liquor ratio is 150%, temperature is normal temperature, and aldehyde consumption is 5%, and grease-removing agent consumption is 1%, leaves standstill 5h after washing;

Liming operation: liquor ratio is 150%, temperature is normal temperature, and grease-removing agent consumption is 6%, and auxiliary liming agent consumption is 1%, leaves standstill 60min; Add lime powder 6%, permeate agent 3%, leave standstill 30min; Add Sodium sulfhydrate 3%, sodium sulphite 3%, after leaving standstill 80h, discharge opeing is washed;

Deliming operation: liquor ratio is 150%, leave standstill 4h, temperature is normal temperature, and grease-removing agent consumption is 1%, and permeate agent consumption is 2%, and deliming auxiliary dosage is 0.5%, and ammonium sulfate consumption is 8%, leaves standstill 10h, regulates pH to be 8.0, completes after washing;

United bleaching operation: adopt the mode of oxidation bleaching and reduction bleaching associating to strengthen bleaching effect, liquor ratio is 150%;

During oxidation bleaching, add oxygenant, consumption is 40%, adds at twice, and interval 4h, fully washes;

During reduction bleaching, add reductive agent, consumption is 5%, leaves standstill 2h after washing;

Softening process: liquor ratio is 400%, temperature is 35 DEG C, and grease-removing agent consumption is 5%, and soda ash consumption is 0.3%, and pancreatin consumption is 3%, allows enzyme permeate 2h at normal temperatures, then is warming up to 40 DEG C, softening 2h, hold over night after washing;

Degreasing process: liquor ratio is 400%, temperature is 30 DEG C, and grease-removing agent consumption is 5%, and soda ash consumption is 0.3%, and permeate agent consumption is 3%, leaves standstill 4h after washing;

Softening first bone, bleaching process: liquor ratio is 400%, salt consumption is 15%, infiltration 30min, grease-removing agent consumption is 1%, and the consumption of acid is 3%, and clorox consumption is 1%, sodium pyrosulfate consumption is 5%, reductive agent consumption is 0.5%, within every two days, adds the acid of 3%, clorox, sodium pyrosulfate and reductive agent, leaves standstill and changes liquid washing after 4 days;

Pickling, softening process: liquor ratio is 400%, salt consumption is 15%, infiltration 30min, and the consumption of acid is 0.1%, and regulate pH to be 3.0, macerating enzyme consumption is 0.5%, leaves standstill 30h;

Tanning processes: carry out in pickling liquid, liquor ratio is 100%, and formic acid consumption is 3%, regulates pH to be 2.2, and leave standstill 30min, chromium powder consumption is 10%, and leave standstill 10h, masking agent consumption is 3%, turns and stops in conjunction with 20h; Temperature is adjusted to 35 DEG C, and gradation adds alkali and regulates pH to be 4.0, every minor tick 4h, and total time is 48h, hold over night, goes out drum and takes horse 20h;

Degreasing process: liquor ratio is 300%, temperature is 30 DEG C, and grease-removing agent consumption is 6%, leaves standstill 10h after washing;

In and operation: liquor ratio is 200%, and temperature is 35 DEG C, and neutralizing agent consumption is 6%, and alkali consumption is 0.5%, gradation regulate pH be 6.5, leave standstill 10h, change liquid washing;

Retanning procedures: liquor ratio is 200%, temperature is 35 DEG C, and retanning agent consumption is 6%, and synthetic fat liquor consumption is 1%, and tannin extract consumption is 8%, turns and stops in conjunction with 10h, washing 30min;

Stuffing operation: liquor ratio is 200%, temperature is 40 DEG C, and dispersant dosage is 3%, and synthetic fat liquor consumption is 5%, and animal fatting agent consumption is 10%, turns and stops in conjunction with 10h, washing 30min;

Dry-cleaning operation: using zellon, D-60 petroleum solvent as dry cleaning composition, dry-cleaning 30min, dries 10min, dries;

Dyeing process: liquor ratio is 200%, temperature is 40 DEG C, and dye dosage is 5%, turns and stops in conjunction with 10h, and check otch, add the formic acid of 1.5% after even dyeing, gradation adds, every minor tick 30min, adjusts pH to be 3.5, fixing 6h, and washing 30min, leaves standstill 10 hours;

In above-mentioned operation, also can add the permeate agent of 5% in degreasing, retanning and stuffing operation, Becaltal Pic S selected by permeate agent.

In soaking process:

Clariant DA-01 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Soaking selects Tergolix W-01-ID;

DESOAGEN WT-H selected by wetting agent;

In degreasing, preimpregnation ash process:

DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Becaltal Pic S selected by permeate agent;

Sodium Sulphide selects sodium sulphite;

In aldehyde pretan operation:

Aldehyde selects glutaraldehyde;

DESOAGEN N309 selected by grease-removing agent;

In liming operation:

Clariant DA-01 selected by grease-removing agent;

Auxiliary liming agent selects ERHAVIT MB;

Becaltal Pic S selected by permeate agent;

In deliming operation:

DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

Deliming selection of auxiliary CISMOLLAN BH-C;

In united bleaching operation:

Hydrogen peroxide selected by oxygenant;

Vat powder selected by reductive agent;

In softening process:

Clariant DA-01 selected by grease-removing agent;

Pancreatin selects OROPON OO;

In degreasing process:

DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

In softening first bone, bleaching process:

Sodium-chlor selected by salt;

Clariant DA-01 selected by grease-removing agent;

Acid formic acid;

Vat powder selected by reductive agent;

In pickling, softening process:

Sodium-chlor selected by salt;

Acid formic acid;

Macerating enzyme selects DESOBATE TN;

In tanning processes:

Masking agent selects DESOAGEN KP;

In degreasing process:

DESOAGEN N309 selected by grease-removing agent;

In and operation in:

DESOTAN NT selected by neutralizing agent;

Alkali selects sodium bicarbonate;

In retanning procedures:

Retanning agent selects Tanigan HO;

The thick GLH of power selected by synthetic fat liquor;

In stuffing operation:

Dispersion agent selects Desoagen SHN;

The thick GLH of power selected by synthetic fat liquor;

Animal fatting agent selects CORIPOL MK.

The crocodile skin product properties obtained after test is good, and shrinkage temperature reaches 93 DEG C, and softness, fullness are better.

Embodiment 2:

Concrete process is as follows:

Soaking process: liquor ratio is 350%, temperature is 30 DEG C, and grease-removing agent consumption is 4%, and sterilant consumption is 0.6%, and Soaking consumption is 2%, and wetting agent consumption is 1.5%, leaves standstill 18h after washing;

Degreasing, preimpregnation ash process: liquor ratio is 350%, temperature is 32 DEG C, and grease-removing agent consumption is 4%, and sterilant consumption is 0.6%, and permeate agent consumption is 2%; Add the pre-liming of Sodium Sulphide, consumption is 1.5% simultaneously, leaves standstill 18h after washing;

Aldehyde pretan operation: liquor ratio is 350%, temperature is normal temperature, and aldehyde consumption is 2.5%, and grease-removing agent consumption is 2%, leaves standstill 3h after washing;

Liming operation: liquor ratio is 350%, temperature is normal temperature, and grease-removing agent consumption is 4%, and auxiliary liming agent consumption is 2%, leaves standstill 45min; Add lime powder 7%, permeate agent 2%, leave standstill 45min; Add Sodium sulfhydrate 2%, sodium sulphite 5%, after leaving standstill 60h, discharge opeing is washed;

Deliming operation: liquor ratio is 350%, leave standstill 2.5h, temperature is normal temperature, and grease-removing agent consumption is 2%, and permeate agent consumption is 1.5%, and deliming auxiliary dosage is 1%, and ammonium sulfate consumption is 5%, leaves standstill 20h, regulates pH to be 7.7, completes after washing;

United bleaching operation: adopt the mode of oxidation bleaching and reduction bleaching associating to strengthen bleaching effect, liquor ratio is 350%;

During oxidation bleaching, add oxygenant, consumption is 25%, adds at twice, and interval 7h, fully washes;

During reduction bleaching, add reductive agent, consumption is 3%, leaves standstill 6h after washing;

Softening process: liquor ratio is 250%, temperature is 37 DEG C, and grease-removing agent consumption is 3%, and soda ash consumption is 1%, and pancreatin consumption is 2%, allows enzyme permeate 5h at normal temperatures, then is warming up to 37 DEG C, softening 5h, hold over night after washing;

Degreasing process: liquor ratio is 250%, temperature is 32 DEG C, and grease-removing agent consumption is 3%, and soda ash consumption is 1%, and permeate agent consumption is 2%, leaves standstill 7h after washing;

Softening first bone, bleaching process: liquor ratio is 250%, salt consumption is 25%, infiltration 20min, grease-removing agent consumption is 3%, and the consumption of acid is 2%, and clorox consumption is 3%, sodium pyrosulfate consumption is 4%, reductive agent consumption is 2%, within every two days, adds the acid of 2%, clorox, sodium pyrosulfate and reductive agent, leaves standstill and changes liquid washing after 8 days;

Pickling, softening process: liquor ratio is 250%, salt consumption is 20%, infiltration 20min, and the consumption of acid is 2%, and regulate pH to be 2.6, macerating enzyme consumption is 2%, leaves standstill 25h;

Tanning processes: carry out in pickling liquid, liquor ratio is 150%, and formic acid consumption is 2%, regulates pH to be 2.5, and leave standstill 30min, chromium powder consumption is 7%, and leave standstill 17h, masking agent consumption is 2%, turns and stops in conjunction with 30h; Temperature is adjusted to 37 DEG C, and gradation adds alkali and regulates pH to be 3.9, every minor tick 5h, and total time is 32h, hold over night, goes out drum and takes horse 22h;

Degreasing process: liquor ratio is 200%, temperature is 32 DEG C, and grease-removing agent consumption is 3%, leaves standstill 17h after washing;

In and operation: liquor ratio is 150%, and temperature is 37 DEG C, and neutralizing agent consumption is 4%, and alkali consumption is 2%, gradation regulate pH be 6.0, leave standstill 15h, change liquid washing;

Retanning procedures: liquor ratio is 150%, temperature is 37 DEG C, and retanning agent consumption is 5%, and synthetic fat liquor consumption is 2%, and tannin extract consumption is 6%, turns and stops in conjunction with 17h, washing 30min;

Stuffing operation: liquor ratio is 150%, temperature is 45 DEG C, and dispersant dosage is 2%, and synthetic fat liquor consumption is 7%, and animal fatting agent consumption is 7%, turns and stops in conjunction with 17h, washing 30min;

Dry-cleaning operation: using zellon, D-60 petroleum solvent as dry cleaning composition, dry-cleaning 20min, dries 20min, dries;

Dyeing process: liquor ratio is 150%, temperature is 45 DEG C, and dye dosage is 3%, turns and stops in conjunction with 20h, and check otch, add the formic acid of 1.0% after even dyeing, gradation adds, every minor tick 30min, adjusts pH to be 3.7, fixing 4h, and washing 30min, leaves standstill 17 hours;

In above-mentioned operation, also can add the permeate agent of 3% in degreasing, retanning and stuffing operation, Becaltal Pic S selected by permeate agent.

In soaking process:

Clariant DA-01 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Soaking selects Tergolix W-01-ID;

DESOAGEN WT-H selected by wetting agent;

In degreasing, preimpregnation ash process:

DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Becaltal Pic S selected by permeate agent;

Sodium Sulphide selects sodium sulphite;

In aldehyde pretan operation:

Aldehyde selects glutaraldehyde;

DESOAGEN N309 selected by grease-removing agent;

In liming operation:

Clariant DA-01 selected by grease-removing agent;

Auxiliary liming agent selects ERHAVIT MB;

Becaltal Pic S selected by permeate agent;

In deliming operation:

DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

Deliming selection of auxiliary CISMOLLAN BH-C;

In united bleaching operation:

Hydrogen peroxide selected by oxygenant;

Vat powder selected by reductive agent;

In softening process:

Clariant DA-01 selected by grease-removing agent;

Pancreatin selects OROPON OO;

In degreasing process:

DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

In softening first bone, bleaching process:

Sodium-chlor selected by salt;

Clariant DA-01 selected by grease-removing agent;

Acid formic acid;

Vat powder selected by reductive agent;

In pickling, softening process:

Sodium-chlor selected by salt;

Acid formic acid;

Macerating enzyme selects DESOBATE TN;

In tanning processes:

Masking agent selects DESOAGEN KP;

In degreasing process:

DESOAGEN N309 selected by grease-removing agent;

In and operation in:

DESOTAN NT selected by neutralizing agent;

Alkali selects sodium bicarbonate;

In retanning procedures:

Retanning agent selects Tanigan HO;

The thick GLH of power selected by synthetic fat liquor;

In stuffing operation:

Dispersion agent selects Desoagen SHN;

The thick GLH of power selected by synthetic fat liquor;

Animal fatting agent selects CORIPOL MK.

The crocodile skin product properties obtained after test is good, and average shrinkage temperature reaches 95.2 DEG C, and softness, fullness are better.

Embodiment 3:

Concrete process is as follows:

Soaking process: liquor ratio is 500%, temperature is 20 DEG C, and grease-removing agent consumption is 6%, and sterilant consumption is 0.3%%, and Soaking consumption is 4%, and wetting agent consumption is 0.3%, leaves standstill 24h after washing;

Degreasing, preimpregnation ash process: liquor ratio is 150%, temperature is 35 DEG C, and grease-removing agent consumption is 2%, and sterilant consumption is 1%, and permeate agent consumption is 1%; Add the pre-liming of Sodium Sulphide, consumption is 3% simultaneously, leaves standstill 12h after washing;

Aldehyde pretan operation: liquor ratio is 500%, temperature is normal temperature, and aldehyde consumption is 0.5%, and grease-removing agent consumption is 4%, leaves standstill 2h after washing;

Liming operation: liquor ratio is 500%, temperature is normal temperature, and grease-removing agent consumption is 2%, and auxiliary liming agent consumption is 3%, leaves standstill 30min; Add lime powder 8%, permeate agent 1%, leave standstill 60min; Add Sodium sulfhydrate 1%, sodium sulphite 8%, after leaving standstill 40h, discharge opeing is washed;

Deliming operation: liquor ratio is 500%, leave standstill 1.5h, temperature is normal temperature, and grease-removing agent consumption is 3%, and permeate agent consumption is 0.5%, and deliming auxiliary dosage is 2%, and ammonium sulfate consumption is 3%, leaves standstill 30h, regulates pH to be 7.5, completes after washing;

United bleaching operation: adopt the mode of oxidation bleaching and reduction bleaching associating to strengthen bleaching effect, liquor ratio is 500%;

During oxidation bleaching, add oxygenant, consumption is 10%, adds at twice, and interval 10h, fully washes;

During reduction bleaching, add reductive agent, consumption is 1%, leaves standstill 10h after washing;

Softening process: liquor ratio is 100%, temperature is 40 DEG C, and grease-removing agent consumption is 1%, and soda ash consumption is 2%, and pancreatin consumption is 1%, allows enzyme permeate 8h at normal temperatures, then is warming up to 35 DEG C, softening 8h, hold over night after washing;

Degreasing process: liquor ratio is 100%, temperature is 35 DEG C, and grease-removing agent consumption is 1%, and soda ash consumption is 2%, and permeate agent consumption is 1%, leaves standstill 10h after washing;

Softening first bone, bleaching process: liquor ratio is 100%, salt consumption is 40%, infiltration 10min, grease-removing agent consumption is 5%, and the consumption of acid is 0.5%, and clorox consumption is 5%, sodium pyrosulfate consumption is 2%, reductive agent consumption is 4%, within every two days, adds the acid of 0.5%, clorox, sodium pyrosulfate and reductive agent, leaves standstill and changes liquid washing after 12 days;

Pickling, softening process: liquor ratio is 100%, salt consumption is 30%, infiltration 10min, and the consumption of acid is 3%, and regulate pH to be 2.2, macerating enzyme consumption is 3%, leaves standstill 20h;

Tanning processes: carry out in pickling liquid, liquor ratio is 200%, and formic acid consumption is 0.5%, regulates pH to be 2.8, and leave standstill 30min, chromium powder consumption is 5%, and leave standstill 24h, masking agent consumption is 1%, turns and stops in conjunction with 40h; Temperature is adjusted to 35 DEG C, and gradation adds alkali and regulates pH to be 4.0, every minor tick 4h, and total time is 48h, hold over night, goes out drum and takes horse 20h;

In soaking process:

DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Soaking selects Tergolix W-01-ID;

DESOAGEN WT-H selected by wetting agent;

In degreasing, preimpregnation ash process:

Clariant DA-01 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Becaltal Pic S selected by permeate agent;

Sodium Sulphide selects Sodium sulfhydrate;

In aldehyde pretan operation:

Aldehyde selects glutaraldehyde;

Clariant DA-01 selected by grease-removing agent;

In liming operation:

DESOAGEN N309 selected by grease-removing agent;

Auxiliary liming agent selects ERHAVIT MB;

Becaltal Pic S selected by permeate agent;

In deliming operation:

Clariant DA-01 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

Deliming selection of auxiliary CISMOLLAN BH-C;

In united bleaching operation:

Hydrogen peroxide selected by oxygenant;

Vat powder selected by reductive agent;

In softening process:

DESOAGEN N309 selected by grease-removing agent;

Pancreatin selects OROPON OO;

In degreasing process:

Clariant DA-01 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

In softening first bone, bleaching process:

Sodium-chlor selected by salt;

DESOAGEN N309 selected by grease-removing agent;

Acid formic acid;

Vat powder selected by reductive agent;

In pickling, softening process:

Sodium-chlor selected by salt;

Acid formic acid;

Macerating enzyme selects DESOBATE TN;

In tanning processes:

Masking agent selects DESOAGEN KP;

In degreasing process:

Clariant DA-01 selected by grease-removing agent;

In and operation in:

SELLASOL NG selected by neutralizing agent;

Alkali formic acid sodium;

In retanning procedures:

Retanning agent selects Tanigan HO;

Desopon LQ-5 selected by synthetic fat liquor;

In stuffing operation:

Dispersion agent selects BORPON SAF;

Desopon LQ-5 selected by synthetic fat liquor;

Animal fatting agent selects Desopon QL.

The crocodile skin product properties obtained after test is good, and average shrinkage temperature has reached 96.8 DEG C, wherein has 2 skins to reach coctostabile degree, and finished leather is soft, fullness is better.

Content of the present invention is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading specification sheets of the present invention to any equivalence that technical solution of the present invention is taked, is claim of the present invention and contains.

Claims

1. crocodile belly leather working method, is characterized in that:

Comprise the following steps:

Concrete process is as follows:

2. crocodile belly leather working method according to claim 1, is characterized in that:

3. crocodile belly leather working method according to claim 2, is characterized in that:

In soaking process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Soaking selects Tergolix W-01-ID;

DESOAGEN WT-H selected by wetting agent;

In degreasing, preimpregnation ash process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

DESOAGEN KL selected by sterilant;

Becaltal Pic S selected by permeate agent;

Sodium Sulphide selects sodium sulphite, Sodium sulfhydrate;

In aldehyde pretan operation:

Aldehyde selects glutaraldehyde;

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

In liming operation:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Auxiliary liming agent selects ERHAVIT MB;

Becaltal Pic S selected by permeate agent;

In deliming operation:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

Deliming selection of auxiliary CISMOLLAN BH-C;

In united bleaching operation:

Hydrogen peroxide selected by oxygenant;

Vat powder selected by reductive agent;

In softening process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Pancreatin selects OROPON OO;

In degreasing process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Becaltal Pic S selected by permeate agent;

In softening first bone, bleaching process:

Sodium-chlor selected by salt;

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

Acid formic acid;

Vat powder selected by reductive agent;

In pickling, softening process:

Sodium-chlor selected by salt;

Acid formic acid;

Macerating enzyme selects DESOBATE TN;

In tanning processes:

Masking agent selects DESOAGEN KP;

In degreasing process:

Clariant DA-01 or DESOAGEN N309 selected by grease-removing agent;

In and operation in:

DESOTAN NT or SELLASOL NG selected by neutralizing agent;

Alkali formic acid sodium, sodium bicarbonate;

In retanning procedures:

Retanning agent selects Tanigan HO;

Thick GLH or the Desopon LQ-5 of power selected by synthetic fat liquor;

In stuffing operation:

Dispersion agent selects BORPON SAF, Desoagen SHN;

Thick GLH or the Desopon LQ-5 of power selected by synthetic fat liquor;

Animal fatting agent selects Desopon QL or CORIPOL MK.