CN114231671A - Manufacturing process of waterproof wear-resistant formal upper leather - Google Patents
Manufacturing process of waterproof wear-resistant formal upper leather Download PDFInfo
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- CN114231671A CN114231671A CN202111327630.6A CN202111327630A CN114231671A CN 114231671 A CN114231671 A CN 114231671A CN 202111327630 A CN202111327630 A CN 202111327630A CN 114231671 A CN114231671 A CN 114231671A
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/04—Soaking
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides a manufacturing process of waterproof wear-resistant formal upper leather, and relates to the technical field of upper leather manufacturing. The manufacturing process of the waterproof wear-resistant formal upper leather comprises the steps of adding an additive OS, a wax emulsion, modified casein and the like during the finishing work of the waterproof leather, improving the whole waterproof effect, and in the whole finishing process, a cross-linking agent is needed to be used in each pulp, so that the strength of a coating film can be increased, the coating film has strong toughness, and the waterproof performance can be improved. The proper amount of salted hides are selected through a good raw material selection mode, strict grouping work is carried out, namely, manual raw material distinguishing is adopted, namely, the size, the thickness, the water content, the oil content, the fur coverage rate and the weight of each piece of salted hides are measured, the salted hides with similar data are selected as one group, different grouping is carried out, and the difference of the soaking effect generated between the groups is small after the salted hides are subjected to subsequent soaking work aiming at different groups.
Description
Technical Field
The invention relates to the technical field of shoe upper leather manufacturing, in particular to a manufacturing process of waterproof wear-resistant formal shoe upper leather.
Background
Shoe upper leather is a raw material for manufacturing shoes, and on the surface of the shoes, the raw material of the shoe upper leather is various, such as leather shoe upper leather, PU shoe upper leather, PVC shoe upper leather and the like, and generally comprises cow leather (head layer, two-three layer, suede), sheepskin (head layer, two-layer, suede), pigskin (head layer, two-layer, suede), horse leather, snake leather and the like, wherein the cow leather is divided into cow leather and buffalo leather; sheepskin is divided into goatskin and sheep skin. The fur is mainly divided into fox fur, goat fur, rabbit fur, mink fur and the like according to the types, and the foxes are divided into blue foxes, silver foxes and red foxes; the goat is divided into adult goat and non-adult goat, and the rabbit hair is divided into grass yellow rabbit, rex rabbit, white hair rabbit, etc.; minks are divided into male and female minks. Leather and fur fall into a wide variety. The smooth skin of leather is used in many leather products because of its tensile strength, dirt resistance, wear resistance and good breathability.
At present, when the existing waterproof wear-resistant formal upper leather manufacturing process is in actual operation, a good raw material selection mode is lacked, the existing traditional raw material selection only takes the size and the weight of leather as grouping conditions and cannot obtain detailed grouping with similar integral quality of the leather, the difference of the soaking effect generated among groups is easy to be overlarge after the leather is soaked in different groups, the existing waterproof wear-resistant upper leather manufacturing process is lacked, the existing waterproof wear-resistant formal upper leather manufacturing process is lacked with good and complete screening, machining and preparation on the leather, the actual coating of the waterproof leather is carried out, hydrophilic material control and additive addition are lacked, and the actual waterproof coating waterproof effect is poor.
Therefore, a new manufacturing process of the waterproof wear-resistant formal upper leather is developed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a manufacturing process of waterproof wear-resistant formal upper leather, which solves the technical problems that raw materials are selected from the same group, have large difference and lack of good waterproof wear-resistant upper leather.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a manufacturing process of waterproof wear-resistant formal upper leather comprises the following specific steps:
s1, preparing raw materials, selecting a proper amount of salted leathers, carrying out strict grouping work, namely manually distinguishing the raw materials, namely measuring the size, thickness, water content, oil content, fur coverage rate and weight of each piece of salted leathers, selecting the salted leathers with similar data as a group, and carrying out different grouping;
s2, performing water immersion on salted skins, namely performing water immersion on the salted skins in groups in sequence according to the groups of the salted skins, weighing different groups, preparing a soaking solution according to a weighing data ratio to perform water immersion, performing four-knife meat removal on raw materials after the water immersion, facilitating removal of meat and oil stain inside and outside the clean skins by adopting a four-knife method, facilitating rapid penetration of chemical materials in a later process, and performing a skin unhairing and liming process which comprises the steps of batch, weighing, water immersion, meat removal, re-water immersion, meat removal, weighing and deliming;
s3, secondary treatment of the leather, namely performing deliming softening work on the leather, namely performing the following processes of liming, fleshing, weighing, washing, deliming, softening and washing, and performing pickling work on the leather after the deliming softening work is performed on the leather, so as to reduce the pH value of the leather;
s4, tanning, namely, pretanning is firstly carried out, and aiming at the characteristic that the whole leather is tightly arranged, the collagen fiber is further loosened by adopting a pickling overnight method, namely, 1.2 percent of pickling auxiliary agent Feliderm CS (Craine), 0.7 percent of formic acid and 0.6 percent of sulfuric acid are added, so that the pH value is about 2.8, the leather after pretanning treatment breaks or weakens most of originally possessed adhesive bonds in the raw leather to a greater extent, thereby reducing the stability of the collagen structure, weighing the leather, washing with running water after being filled into drums, and deliming and softening after being washed to be about pH 9.8. The method is characterized in that 10B enzyme of Claiens is selected, the activity unit is 1100, the permeability is quite strong, the method is suitable for low-temperature long-time softening, the softness of the inner layer and the softness of the outer layer of the 10B softened skin tend to be consistent, the whole skin is quite uniform, the skin surface is white, and a method of adding a small amount of organic acid firstly and then adding sulfuric acid twice is adopted;
s5, screening, machining and preparing, selecting leather with composite performance requirements according to the performance requirements of finished leather, carrying out subsequent production, carrying out water squeezing, splitting and shaving machine processing on the leather, retanning to further improve the damp-heat resistance of the leather, further carrying out neutralization dyeing, oiling and finishing on the leather to obtain a semi-finished leather product, and then carrying out waterproof leather finishing on the semi-finished leather product, namely, in the waterproof finishing, controlling the hydrophilic material to be at the minimum, adding a proper amount of additives including wax emulsion and modified casein to improve the waterproof effect of the waterproof finishing, and in the whole finishing, carrying out uniform waterproof leather finishing on the semi-finished leather product so as to finish the manufacturing of the waterproof wear-resistant front loading vamp leather.
Preferably, the performance requirements of the leather mainly comprise the color depth of the leather, the color pattern damage of the leather and the leather body state, the water squeezing reduces the water content of the leather to be below 40% for convenient splitting and shaving, the leather after water squeezing is slightly white, the splitting mode comprises an alkali leather splitting process, a blue wet leather splitting process, a tanning leather splitting process and a white wet leather splitting process, and the shaving comprises deliming, softening, pickling, chrome tanning, standing, batching, water squeezing, stretching, blue wet leather splitting and cutting.
Preferably, the oiling work of the leather is mainly to avoid the phenomenon that the leather is not oiled, the method is seriously bonded between fibers in the drying process, the leather is hardened and becomes brittle, the physical and mechanical properties and the processing and use values of the finished leather are seriously reduced, after the leather is oiled, grease forms a layer of oil film on the surface of the leather fibers to lubricate the fibers and avoid the bonding between the leather fibers, the leather is soft and full, the tensile strength and the extensibility of the leather are improved, meanwhile, the hanging drying, the veneer pasting drying, the vacuum drying and the toggling drying can be carried out during the leather drying work, and the two or more combined drying methods can be adopted for the actual operation to improve the whole drying efficiency.
Preferably, the waterproof leather finishing operation is performed by adding additives such as OS, wax emulsion, modified casein, etc. to improve the overall waterproof effect, and in the whole finishing operation, a cross-linking agent is required to be used in each slurry, so that the strength of the coating film is increased, the coating film has high toughness, and the waterproof performance is increased.
(III) advantageous effects
The invention provides a manufacturing process of waterproof wear-resistant formal upper leather. The method has the following beneficial effects:
1. this waterproof wear-resisting formal dress instep leather manufacturing technology selects the right amount of salt to cure the skin through good raw materials mode, carries out strict batch work, adopts the manual work to carry out the raw materials and distinguishes promptly, measures every piece of salt cured skin width of cloth size, thickness, water content, oil content, fur coverage and weight promptly, selects the salt cured skin that above-mentioned data is close to be a set of, and carries out different grouping, and its follow-up is to the work of different groups soaking, and the effect difference that soaks that produces between the same group is less.
2. The manufacturing process of the waterproof wear-resistant formal dress vamp leather comprises the steps of selecting leather with composite performance requirements according to the performance requirements of finished leather through a good waterproof wear-resistant leather surface process, carrying out follow-up production on the leather, carrying out water squeezing, splitting and shaving machine processing on the leather, retanning to further improve the moisture and heat resistance of the leather, carrying out neutralization dyeing, oiling and finishing on the leather to obtain a semi-finished leather product, and carrying out waterproof leather finishing on the leather product, namely, in the waterproof finishing, controlling hydrophilic materials to be at the minimum, and adding a proper amount of additives including wax emulsion and modified casein to improve the waterproof effect of the waterproof finishing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a manufacturing process of waterproof wear-resistant formal upper leather, which comprises the following specific steps:
s1, preparing raw materials, selecting a proper amount of salted leathers, carrying out strict grouping work, namely manually distinguishing the raw materials, namely measuring the size, thickness, water content, oil content, fur coverage rate and weight of each piece of salted leathers, selecting the salted leathers with similar data as a group, and carrying out different grouping;
s2, performing water immersion on salted skins, namely performing water immersion on the salted skins in groups in sequence according to the groups of the salted skins, weighing different groups, preparing a soaking solution according to a weighing data ratio to perform water immersion, performing four-knife meat removal on raw materials after the water immersion, facilitating removal of meat and oil stain inside and outside the clean skins by adopting a four-knife method, facilitating rapid penetration of chemical materials in a later process, and performing a skin unhairing and liming process which comprises the steps of batch, weighing, water immersion, meat removal, re-water immersion, meat removal, weighing and deliming;
s3, secondary treatment of the leather, namely performing deliming softening work on the leather, namely performing the following processes of liming, fleshing, weighing, washing, deliming, softening and washing, and performing pickling work on the leather after the deliming softening work is performed on the leather, so as to reduce the pH value of the leather;
s4, tanning, namely, pretanning is firstly carried out, and aiming at the characteristic that the whole leather is tightly arranged, the collagen fiber is further loosened by adopting a pickling overnight method, namely, 1.2 percent of pickling auxiliary agent Feliderm CS (Craine), 0.7 percent of formic acid and 0.6 percent of sulfuric acid are added, so that the pH value is about 2.8, the leather after pretanning treatment breaks or weakens most of originally possessed adhesive bonds in the raw leather to a greater extent, thereby reducing the stability of the collagen structure, weighing the leather, washing with running water after being filled into drums, and deliming and softening after being washed to be about pH 9.8. The method is characterized in that 10B enzyme of Claiens is selected, the activity unit is 1100, the permeability is quite strong, the method is suitable for low-temperature long-time softening, the softness of the inner layer and the softness of the outer layer of the 10B softened skin tend to be consistent, the whole skin is quite uniform, the skin surface is white, and a method of adding a small amount of organic acid firstly and then adding sulfuric acid twice is adopted;
s5, screening, machining and preparing, selecting leather with composite performance requirements according to the performance requirements of finished leather, carrying out subsequent production, carrying out water squeezing, splitting and shaving machine processing on the leather, retanning to further improve the damp-heat resistance of the leather, further carrying out neutralization dyeing, oiling and finishing on the leather to obtain a semi-finished leather product, and then carrying out waterproof leather finishing on the semi-finished leather product, namely, in the waterproof finishing, controlling the hydrophilic material to be at the minimum, adding a proper amount of additives including wax emulsion and modified casein to improve the waterproof effect of the waterproof finishing, and in the whole finishing, carrying out uniform waterproof leather finishing on the semi-finished leather product so as to finish the manufacturing of the waterproof wear-resistant front loading vamp leather.
Example two:
the difference between the present embodiment and the first embodiment is: the performance requirements of the leather mainly comprise the color depth of the leather, the color pattern damage of the leather and the state of the leather body, water squeezing is carried out to reduce the water content of the leather to be below 40 percent in order to facilitate splitting and shaving, the leather after water squeezing is in slight white, the splitting mode comprises an alkali leather splitting process, a blue wet leather splitting process, a niter leather splitting process and a white wet leather splitting process, shaving comprises deashing, softening, pickling, chrome tanning, standing, batching, water squeezing, stretching, blue wet leather splitting and cutting, and oil is added to the leather, so that the leather without oil adding is mainly avoided, the method serious bonding phenomenon between fibers can be caused in the drying process, the leather becomes hard and brittle, the physical mechanical property and the processing use value of the finished leather are seriously reduced, after the oil is added to the leather, the grease forms an oil film on the surface of the leather fibers, the fibers can be lubricated, the bonding between the fibers can be avoided, the leather is soft and full, and the tensile strength and the extensibility of the leather are improved in area, meanwhile, when the leather is dried, hanging and drying, pasting plate drying, vacuum drying and toggling plate drying can be carried out, and the two or more combined drying methods can be adopted in actual operation to improve the overall drying efficiency.
Example three:
when the waterproof leather is coated, additives OS, wax emulsion, modified casein and the like can be added to improve the whole waterproof effect, a cross-linking agent is required to be used in each slurry in the whole coating, the strength of a coating film can be increased, the coating film has high toughness, the waterproof performance can be improved, after the whole coating is finished, gloss oil is sprayed on the top layer to fasten the waterproof effect of the coating, the waterproof performance of a leather blank is measured before the coating, the coating performance is known, hydrophilic substances are avoided as much as possible, and the bottom coating is laid to show the optimal performance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A manufacturing process of waterproof wear-resistant formal upper leather is characterized by comprising the following steps: the method comprises the following specific steps:
s1, preparing raw materials, selecting a proper amount of salted leathers, carrying out strict grouping work, namely manually distinguishing the raw materials, namely measuring the size, thickness, water content, oil content, fur coverage rate and weight of each piece of salted leathers, selecting the salted leathers with similar data as a group, and carrying out different grouping;
s2, performing water immersion on salted skins, namely performing water immersion on the salted skins in groups in sequence according to the groups of the salted skins, weighing different groups, preparing a soaking solution according to a weighing data ratio to perform water immersion, performing four-knife meat removal on raw materials after the water immersion, facilitating removal of meat and oil stain inside and outside the clean skins by adopting a four-knife method, facilitating rapid penetration of chemical materials in a later process, and performing a skin unhairing and liming process which comprises the steps of batch, weighing, water immersion, meat removal, re-water immersion, meat removal, weighing and deliming;
s3, secondary treatment of the leather, namely performing deliming softening work on the leather, namely performing the following processes of liming, fleshing, weighing, washing, deliming, softening and washing, and performing pickling work on the leather after the deliming softening work is performed on the leather, so as to reduce the pH value of the leather;
s4, tanning, namely, pretanning is firstly carried out, and aiming at the characteristic that the whole leather is tightly arranged, the collagen fiber is further loosened by adopting a pickling overnight method, namely, 1.2 percent of pickling auxiliary agent Feliderm CS (Craine), 0.7 percent of formic acid and 0.6 percent of sulfuric acid are added, so that the pH value is about 2.8, the leather after pretanning treatment breaks or weakens most of originally possessed adhesive bonds in the raw leather to a greater extent, thereby reducing the stability of the collagen structure, weighing the leather, washing with running water after being filled into drums, and deliming and softening after being washed to be about pH 9.8. The method is characterized in that 10B enzyme of Claiens is selected, the activity unit is 1100, the permeability is quite strong, the method is suitable for low-temperature long-time softening, the softness of the inner layer and the softness of the outer layer of the 10B softened skin tend to be consistent, the whole skin is quite uniform, the skin surface is white, and a method of adding a small amount of organic acid firstly and then adding sulfuric acid twice is adopted;
s5, screening, machining and preparing, selecting leather with composite performance requirements according to the performance requirements of finished leather, carrying out subsequent production, carrying out water squeezing, splitting and shaving machine processing on the leather, retanning to further improve the damp-heat resistance of the leather, further carrying out neutralization dyeing, oiling and finishing on the leather to obtain a semi-finished leather product, and then carrying out waterproof leather finishing on the semi-finished leather product, namely, in the waterproof finishing, controlling the hydrophilic material to be at the minimum, adding a proper amount of additives including wax emulsion and modified casein to improve the waterproof effect of the waterproof finishing, and in the whole finishing, carrying out uniform waterproof leather finishing on the semi-finished leather product so as to finish the manufacturing of the waterproof wear-resistant front loading vamp leather.
2. The manufacturing process of the waterproof wear-resistant formal upper leather according to claim 1, is characterized in that: the performance requirement of leather mainly includes the colour depth of leather, the colour flower disability and the leather body state of leather, crowded water, in order to cut open the layer and shave evenly, falls the water content of leather below 40%, and the leather after crowded water is slightly white, the mode of cutting open the layer includes cuts open alkali leather technology, cuts open blue wet leather technology, cuts open nitre leather technology and cuts open white wet leather technology, shave evenly including deliming, softening, pickling, chrome tanning, stewing, batching, wringing, extension, cut open blue wet leather and cutting.
3. The manufacturing process of the waterproof wear-resistant formal upper leather according to claim 1, is characterized in that: the oiling work of the leather mainly aims to avoid the phenomenon that leather which is not oiled is seriously bonded between fibers in the drying process, so that the leather is hardened and embrittled, and the physical and mechanical properties and the processing and use values of the finished leather are seriously reduced.
4. The manufacturing process of the waterproof wear-resistant formal upper leather according to claim 1, is characterized in that: when the waterproof leather is coated, additives OS, wax emulsion, modified casein and the like can be added to improve the whole waterproof effect, a cross-linking agent is required to be used in each slurry in the whole coating process, the strength of a coating film can be increased, the coating film has high toughness, the waterproof performance can be improved, in addition, after the whole coating process is finished, gloss oil is required to be sprayed on the top layer to fix the waterproof effect of the coating, the waterproof performance of a leather blank is required to be measured before the coating process, the coating performance is known, hydrophilic substances are avoided as much as possible, and the bottom coating is laid with emphasis on the optimal performance.
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| CN202111327630.6A CN114231671A (en) | 2021-11-10 | 2021-11-10 | Manufacturing process of waterproof wear-resistant formal upper leather |
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| CN202111327630.6A CN114231671A (en) | 2021-11-10 | 2021-11-10 | Manufacturing process of waterproof wear-resistant formal upper leather |
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Citations (4)
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| CN104894299A (en) * | 2015-05-08 | 2015-09-09 | 卢家雄 | Leather production process |
| CN111748661A (en) * | 2020-07-03 | 2020-10-09 | 宁夏金海皮业有限责任公司 | Method for producing color-changing wax shoe upper leather |
-
2021
- 2021-11-10 CN CN202111327630.6A patent/CN114231671A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732390A (en) * | 2012-07-10 | 2012-10-17 | 宋子奎 | Colored leather hyperchromic/cleaning agent composite and preparation method thereof |
| CN104818354A (en) * | 2015-03-10 | 2015-08-05 | 海宁富邦汽车内饰有限公司 | Processing technology for chrome-free tanning leather |
| CN104894299A (en) * | 2015-05-08 | 2015-09-09 | 卢家雄 | Leather production process |
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