CN113025764A - Leather and repairing method thereof - Google Patents
Leather and repairing method thereof Download PDFInfo
- Publication number
- CN113025764A CN113025764A CN202110134961.1A CN202110134961A CN113025764A CN 113025764 A CN113025764 A CN 113025764A CN 202110134961 A CN202110134961 A CN 202110134961A CN 113025764 A CN113025764 A CN 113025764A
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- CN
- China
- Prior art keywords
- leather
- dust
- latex
- repairing method
- filling agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010985 leather Substances 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000428 dust Substances 0.000 claims abstract description 70
- 239000000945 filler Substances 0.000 claims abstract description 64
- 239000004816 latex Substances 0.000 claims abstract description 29
- 229920000126 latex Polymers 0.000 claims abstract description 29
- 230000002950 deficient Effects 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- 229920002472 Starch Polymers 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000008107 starch Substances 0.000 claims description 15
- 235000019698 starch Nutrition 0.000 claims description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 229920002261 Corn starch Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 239000008120 corn starch Substances 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 5
- 239000011118 polyvinyl acetate Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 229920001592 potato starch Polymers 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- FNRMMDCDHWCQTH-UHFFFAOYSA-N 2-chloropyridine;3-chloropyridine;4-chloropyridine Chemical compound ClC1=CC=NC=C1.ClC1=CC=CN=C1.ClC1=CC=CC=N1 FNRMMDCDHWCQTH-UHFFFAOYSA-N 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- 238000012993 chemical processing Methods 0.000 description 1
- 210000004207 dermis Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/44—Mechanical treatment of leather surfaces
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/04—Printing inks based on proteins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/06—Printing inks based on fatty oils
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/08—Printing inks based on natural resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
- C14C11/00—Surface finishing of leather
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses leather and a repairing method thereof, which are completed according to the following steps: the method comprises the following steps: polishing the defective leather, and collecting the polished leather dust; step two: leather dust and latex are mixed according to the proportion of 4-7: 3-6, fully mixing to prepare a filling agent; step three: smearing the polished leather by using leather dust and then rolling until the leather is uniform; step four: repeatedly coating the leather which is coated with the leather dust for 2-5 times by using the filling agent; step five: the finished product is obtained by airing the leather which is coated, the problem that the leather with defects is difficult to use is solved by arranging the filling agent, the utilization rate of the leather with defects is improved, the texture of leather is effectively improved by the repaired leather, the hand feeling is comfortable, and the appearance is integrally higher and higher.
Description
Technical Field
The invention belongs to the technical field of leather, and particularly relates to leather and a repairing method thereof.
Background
The leather is animal skin which is obtained by physical and chemical processing such as unhairing, tanning and the like and is denatured and non-perishable. The leather is formed by tightly weaving natural protein fibers in a three-dimensional space, and the surface of the leather is provided with a special grain surface layer which has natural grains and luster and comfortable hand feeling.
However, in the prior art, the leather has defects, polyurethane is generally directly adopted to wrap the leather, so that the hand feeling is poor, the texture of the leather is not generated, the whole leather looks low, and if the defective leather is directly incinerated and discarded, the treatment mode is not environment-friendly.
Disclosure of Invention
The embodiment of the application provides the leather and the repairing method thereof, the problem that the leather with defects is difficult to use is solved by arranging the filling agent, the utilization rate of the leather with defects is improved, the leather after repairing effectively improves the texture of the leather, the hand feeling is comfortable, the appearance is integrally higher and higher, and the manufacturing cost is effectively reduced.
The technical scheme provided by the embodiment of the application is as follows:
a leather repairing method comprises the following steps:
the method comprises the following steps: polishing the defective leather, and collecting the polished leather dust;
step two: leather dust and latex are mixed according to the proportion of 4-7: 3-6, fully mixing to prepare a filling agent;
step three: smearing the polished leather by using leather dust and then rolling until the leather is uniform;
step four: repeatedly coating the leather which is coated with the leather dust for 2-5 times by using the filling agent;
step five: and (5) airing the coated leather to obtain a finished product.
According to the invention, the defective leather is maintained, the same leather can be properly polished and the leather dust is collected, then the filler is blended, the polished leather is coated by the filler and then dried, and the finished product is obtained.
Further, in the step one, the leather with defects is polished to a thickness of 0.5-2mm, and by this arrangement, the thickness to be polished can be selected according to the defects of the actual leather.
Further, in the second step, in the process of manufacturing the filler, the latex is poured into the filler for clockwise stirring, the leather dust is slowly added in the stirring process until the leather dust is dissolved in the latex, and through the setting, the leather dust is slowly poured into the filler in the same sequence in batches, so that the leather dust is stirred more fully.
Further, in the second step, the temperature in the process of manufacturing the filling agent is 20-28 ℃.
Further, in the second step, the latex comprises the following components in percentage by weight: 10-20% of polyethylene, 7-9% of polyacrylamide, 3-5% of styrene-acrylic emulsion, 3-5% of chloropyridine, 20-28% of starch, 3-5% of active zinc oxide, 5-8% of formaldehyde, 3-5% of hydrochloric acid and the balance of water.
Further, in the second step, the latex comprises the following components in percentage by weight: the starch 10-27%, polyvinyl alcohol 20-37%, polyvinyl acetate emulsion 10-18%, formaldehyde 1-3%, hydrochloric acid 1-3%, water 12-58%, through this arrangement, its ingredient manufacturing process is effective to lower costs, and the non-staining environment, do not produce the pungent smell to the human body, improve the drying time.
Furthermore, the starch is corn starch or potato starch, and through the arrangement, the using amount of chemical raw materials is greatly reduced, and the cost is effectively reduced.
Further, repeating the third step for 2-3 times until the mixture is uniform; the leather dust in the third step and the filler in the fourth step are combined by adopting electrostatic adsorption, wherein the leather dust carries positive or negative charges, and the filler carries charges opposite to the leather dust, so that the leather dust and the filler are combined to form the leather dust-containing composite material
The adsorption is more smooth and stable, and the hand feeling is more comfortable.
Further, in the fifth step, the leather coated with the filler is spread and dried at the drying temperature of 23-35 ℃, so that the leather is fully fused with the filler, and the repairing effect is better.
Leather finished according to the steps of the maintenance method of claim 1, which is environmentally friendly to manufacture, and has a greatly reduced cost and a high quality.
The invention has the beneficial effects that:
by arranging the filling agent, the problem that defective leather is difficult to use is solved, the utilization rate of the defective leather is improved, the repaired leather has better light color fastness, the texture of leather is effectively improved, the hand feeling is comfortable, and the appearance is integrally higher and higher.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Example 1
To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
A leather repairing method comprises the following steps:
the method comprises the following steps: polishing the defective leather, and collecting the polished leather dust;
step two: leather dust and latex are mixed according to the proportion of 4-7: 3-6, fully mixing to prepare a filling agent;
step three: smearing the polished leather by using leather dust and then rolling until the leather is uniform;
step four: repeatedly coating the leather which is coated with the leather dust for 2-5 times by using the filling agent;
step five: and (5) airing the coated leather to obtain a finished product.
According to the invention, the defective leather is maintained, the same leather can be properly polished and the leather dust is collected, then the filler is blended, the polished leather is coated by the filler and then dried, and the finished product is obtained.
Further, in the step one, the leather with defects is polished to a thickness of 0.5-2mm, and by this arrangement, the thickness to be polished can be selected according to the defects of the actual leather.
Further, in the second step, in the process of manufacturing the filler, the latex is poured into the filler for clockwise stirring, the leather dust is slowly added in the stirring process until the leather dust is dissolved in the latex, and through the setting, the leather dust is slowly poured into the filler in the same sequence in batches, so that the leather dust is stirred more fully.
Further, in the second step, the temperature in the process of manufacturing the filling agent is 20-28 ℃.
Further, in the second step, the latex comprises the following components in percentage by weight: 90g of polyethylene, 48g of polyacrylamide, 24g of styrene-acrylic emulsion, 150g of chloroparase, 24g of starch, 36g of active zinc oxide, 24g of formaldehyde, 24g of hydrochloric acid and 180g of water.
Further, in the second step, the latex comprises the following components in percentage by weight: the drying agent comprises 108g of starch, 180g of polyvinyl alcohol, 90g of polyvinyl acetate emulsion, 12g of formaldehyde, 12g of hydrochloric acid and 198g of water.
Furthermore, the starch is corn starch or potato starch, and through the arrangement, the using amount of chemical raw materials is greatly reduced, and the cost is effectively reduced.
Further, repeating the third step for 2-3 times until the mixture is uniform; the leather dust in the third step and the filler in the fourth step are combined by adopting electrostatic adsorption, wherein the leather dust carries positive or negative charges, and the filler carries charges opposite to the leather dust, so that the leather dust and the filler are combined to form the leather dust-containing composite material
The adsorption is more smooth and stable, and the hand feeling is more comfortable.
Further, in the fifth step, the leather coated with the filler is spread and dried at the drying temperature of 23-35 ℃, so that the leather is fully fused with the filler, and the repairing effect is better.
Leather finished according to the steps of the maintenance method of claim 1, which is environmentally friendly to manufacture, and has a greatly reduced cost and a high quality.
Example 2
A leather repairing method comprises the following steps:
the method comprises the following steps: polishing the defective leather, and collecting the polished leather dust;
step two: leather dust and latex are mixed according to the proportion of 4-7: 3-6, fully mixing to prepare a filling agent;
step three: smearing the polished leather by using leather dust and then rolling until the leather is uniform;
step four: repeatedly coating the leather which is coated with the leather dust for 2-5 times by using the filling agent;
step five: and (5) airing the coated leather to obtain a finished product.
According to the invention, the defective leather is maintained, the same leather can be properly polished and the leather dust is collected, then the filler is blended, the polished leather is coated by the filler and then dried, and the finished product is obtained.
Further, in the step one, the leather with defects is polished to a thickness of 0.5-2mm, and by this arrangement, the thickness to be polished can be selected according to the defects of the actual leather.
Further, in the second step, in the process of manufacturing the filler, the latex is poured into the filler for clockwise stirring, the leather dust is slowly added in the stirring process until the leather dust is dissolved in the latex, and through the setting, the leather dust is slowly poured into the filler in the same sequence in batches, so that the leather dust is stirred more fully.
Further, in the second step, the temperature in the process of manufacturing the filling agent is 20-28 ℃.
Further, in the second step, the latex comprises the following components in percentage by weight: 67.5g of polyethylene, 36g of polyacrylamide, 18g of styrene-acrylic emulsion, 112.5g of chloroparase, 18g of starch, 27g of active zinc oxide, 18g of formaldehyde, 18g of hydrochloric acid and 135g of water.
Further, in the second step, the latex comprises the following components in percentage by weight: the drying agent comprises 81g of starch, 135g of polyvinyl alcohol, 67.5g of polyvinyl acetate emulsion, 9g of formaldehyde, 9g of hydrochloric acid and 148.5g of water.
Furthermore, the starch is corn starch or potato starch, and through the arrangement, the using amount of chemical raw materials is greatly reduced, and the cost is effectively reduced.
Further, repeating the third step for 2-3 times until the mixture is uniform; the leather dust in the third step and the filler in the fourth step are combined by adopting electrostatic adsorption, wherein the leather dust carries positive or negative charges, and the filler carries charges opposite to the leather dust, so that the leather dust and the filler are combined to form the leather dust-containing composite material
The adsorption is more smooth and stable, and the hand feeling is more comfortable.
Further, in the fifth step, the leather coated with the filler is spread and dried at the drying temperature of 23-35 ℃, so that the leather is fully fused with the filler, and the repairing effect is better.
Leather finished according to the steps of the maintenance method of claim 1, which is environmentally friendly to manufacture, and has a greatly reduced cost and a high quality.
Example 3
A leather repairing method comprises the following steps:
the method comprises the following steps: polishing the defective leather, and collecting the polished leather dust;
step two: leather dust and latex are mixed according to the proportion of 4-7: 3-6, fully mixing to prepare a filling agent;
step three: smearing the polished leather by using leather dust and then rolling until the leather is uniform;
step four: repeatedly coating the leather which is coated with the leather dust for 2-5 times by using the filling agent;
step five: and (5) airing the coated leather to obtain a finished product.
According to the invention, the defective leather is maintained, the same leather can be properly polished and the leather dust is collected, then the filler is blended, the polished leather is coated by the filler and then dried, and the finished product is obtained.
Further, in the step one, the leather with defects is polished to a thickness of 0.5-2mm, and by this arrangement, the thickness to be polished can be selected according to the defects of the actual leather.
Further, in the second step, in the process of manufacturing the filler, the latex is poured into the filler for clockwise stirring, the leather dust is slowly added in the stirring process until the leather dust is dissolved in the latex, and through the setting, the leather dust is slowly poured into the filler in the same sequence in batches, so that the leather dust is stirred more fully.
Further, in the second step, the temperature in the process of manufacturing the filling agent is 20-28 ℃.
Further, in the second step, the latex comprises the following components in percentage by weight: 45g of polyethylene, 24g of polyacrylamide, 12g of styrene-acrylic emulsion, 75g of chloroparase, 12g of starch, 18g of active zinc oxide, 12g of formaldehyde, 12g of hydrochloric acid and 90g of water.
Further, in the second step, the latex comprises the following components in percentage by weight: 54g of starch, 90g of polyvinyl alcohol, 45g of polyvinyl acetate emulsion, 6g of formaldehyde, 6g of hydrochloric acid and 99g of water.
Furthermore, the starch is corn starch or potato starch, and through the arrangement, the using amount of chemical raw materials is greatly reduced, and the cost is effectively reduced.
Further, repeating the third step for 2-3 times until the mixture is uniform; the leather dust in the third step and the filler in the fourth step are combined by adopting electrostatic adsorption, wherein the leather dust carries positive or negative charges, and the filler carries charges opposite to the leather dust, so that the leather dust and the filler are combined to form the leather dust-containing composite material
The adsorption is more smooth and stable, and the hand feeling is more comfortable.
Further, in the fifth step, the leather coated with the filler is spread and dried at the drying temperature of 23-35 ℃, so that the leather is fully fused with the filler, and the repairing effect is better.
Leather finished according to the steps of the maintenance method of claim 1, which is environmentally friendly to manufacture, and has a greatly reduced cost and a high quality.
The following description will discuss the present invention with reference to comparative examples in order to clarify the effects of the present invention.
| Example 1 | Example 2 | Example 3 | Comparative example | |
| Leather maintenance method | Leather dust: the latex is prepared according to the proportion of 4: 6 mixing Making into filler | Leather dust: the latex is prepared according to the proportion of 5.5: 4.5 preparation by mixing Bulking agent | Leather dust: the latex is prepared according to the proportion of 7: 3 mixing to obtain Filler | Using polyurethanes Package |
| Colour fastness to light | 4 stage | Grade 5 | Grade 6 | Grade 3 |
| Sense of dermis | Grade 3 | 4 stage | Grade 5 | Stage 2 |
| Roughness of | 4 stage | Grade 5 | Grade 6 | Grade 3 |
Remarking: wherein the color fastness to light is grade 8, and the higher the grade is, the better the color fastness to light is; the corium feeling is 7 grades, and the larger the grade is, the better the corium feeling is; the roughness was graded as 7, with the larger the grade, the smoother.
The utilization rate of the defective leather is improved, the color fastness of the repaired leather is good, the texture of the leather is effectively improved, the hand feeling is comfortable, and the appearance is high-grade and high-grade.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. It should be noted that the technical features not described in detail in the present invention can be implemented by any prior art.
Claims (10)
1. A leather repairing method is characterized by comprising the following steps:
the method comprises the following steps: polishing the defective leather, and collecting the polished leather dust;
step two: leather dust and latex are mixed according to the proportion of 4-7: 3-6, fully mixing to prepare a filling agent;
step three: smearing the polished leather by using leather dust and then rolling until the leather is uniform;
step four: repeatedly coating the leather which is coated with the leather dust for 2-5 times by using the filling agent;
step five: and (5) airing the coated leather to obtain a finished product.
2. A leather repairing method according to claim 1, wherein in the first step, the defective leather is sanded to a thickness of 0.5-2 mm.
3. A leather repairing method according to claim 1, wherein in the second step, the latex is poured into the filler and stirred clockwise, and the leather dust is slowly added during stirring until the leather dust is dissolved in the latex.
4. A leather repairing method according to claim 3, wherein in the second step, the temperature in the process of manufacturing the filling agent is 20-28 ℃.
5. A leather repairing method according to claim 1, wherein in the second step, the latex is composed of the following components by weight percentage: 10-20% of polyethylene, 7-9% of polyacrylamide, 3-5% of styrene-acrylic emulsion, 3-5% of chloropyridine, 20-28% of starch, 3-5% of active zinc oxide, 5-8% of formaldehyde, 3-5% of hydrochloric acid and the balance of water.
6. A leather repairing method according to claim 1, wherein in the second step, the latex is composed of the following components by weight percentage: 10-27% of starch, 20-37% of polyvinyl alcohol, 10-18% of polyvinyl acetate emulsion, 1-3% of formaldehyde, 1-3% of hydrochloric acid and 12-58% of water.
7. A method of repairing leather as claimed in claim 5 or claim 6, wherein said starch is corn starch or potato starch.
8. A leather repairing method according to claim 1, wherein the three steps are repeated 2-3 times until uniform; the leather dust in the third step and the filling agent in the fourth step are combined by electrostatic adsorption.
9. A leather repairing method according to claim 1, wherein in the fifth step, the sheared and pressed leather is spread and dried, and the drying temperature is 23-35 ℃.
10. Leather, characterized in that it is finished according to the maintenance method steps of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134961.1A CN113025764B (en) | 2021-02-01 | 2021-02-01 | Leather and repairing method thereof |
Applications Claiming Priority (1)
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721230A (en) * | 1950-12-21 | 1955-01-05 | Deena Ges M B H | Improvements in materials for the treatment of leather |
| CN1133870A (en) * | 1995-04-17 | 1996-10-23 | 陈建祥 | Modified polyvinyl acetate emulsion adhesive |
| CN1283661A (en) * | 1999-08-05 | 2001-02-14 | 昆明五华综合精细化工厂 | White starch emulsoid |
| CN108117763A (en) * | 2018-01-11 | 2018-06-05 | 安徽情暖家具有限公司 | A kind of leather sofa preparation method |
| CN111264972A (en) * | 2020-03-16 | 2020-06-12 | 兴业皮革科技股份有限公司 | Leather shoe upper surface made of natural leather and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721230A (en) * | 1950-12-21 | 1955-01-05 | Deena Ges M B H | Improvements in materials for the treatment of leather |
| CN1133870A (en) * | 1995-04-17 | 1996-10-23 | 陈建祥 | Modified polyvinyl acetate emulsion adhesive |
| CN1283661A (en) * | 1999-08-05 | 2001-02-14 | 昆明五华综合精细化工厂 | White starch emulsoid |
| CN108117763A (en) * | 2018-01-11 | 2018-06-05 | 安徽情暖家具有限公司 | A kind of leather sofa preparation method |
| CN111264972A (en) * | 2020-03-16 | 2020-06-12 | 兴业皮革科技股份有限公司 | Leather shoe upper surface made of natural leather and preparation method thereof |
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| CN113025764B (en) | 2022-05-06 |
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