CN115216566B - Water-splashing-preventing easy-to-decontaminate leather and processing method thereof - Google Patents
Water-splashing-preventing easy-to-decontaminate leather and processing method thereof Download PDFInfo
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- CN115216566B CN115216566B CN202210732124.3A CN202210732124A CN115216566B CN 115216566 B CN115216566 B CN 115216566B CN 202210732124 A CN202210732124 A CN 202210732124A CN 115216566 B CN115216566 B CN 115216566B
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- 239000010985 leather Substances 0.000 title claims abstract description 105
- 238000003672 processing method Methods 0.000 title claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 43
- 239000005871 repellent Substances 0.000 claims abstract description 36
- 239000002689 soil Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000002265 prevention Effects 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 135
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 132
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 112
- 235000019441 ethanol Nutrition 0.000 claims description 43
- 239000005543 nano-size silicon particle Substances 0.000 claims description 37
- 235000012239 silicon dioxide Nutrition 0.000 claims description 37
- 239000000377 silicon dioxide Substances 0.000 claims description 35
- 239000002131 composite material Substances 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 32
- -1 polydimethylsiloxane Polymers 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 22
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 21
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 21
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 21
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 20
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 18
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 18
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 18
- 239000004593 Epoxy Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- 125000003700 epoxy group Chemical group 0.000 claims description 4
- 230000003670 easy-to-clean Effects 0.000 claims 4
- 238000012360 testing method Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000003921 oil Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011246 composite particle Substances 0.000 description 3
- 230000002940 repellent Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000282320 Panthera leo Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000008161 low-grade oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
-
- 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
- C09D139/00—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 a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Coating compositions based on derivatives of such polymers
- C09D139/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
- C09D139/06—Homopolymers or copolymers of N-vinyl-pyrrolidones
-
- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- 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
- C14B1/40—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills
-
- 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
- C14B1/46—Fluffing, buffing, or sanding
-
- 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
- C14B1/58—Drying
-
- 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
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to a water-splashing prevention and soil release leather and a processing method thereof, wherein the water-splashing prevention and soil release leather comprises the following components in parts by weight: 8-12 parts of water-repellent aftertreatment agent and 80-100 parts of leather; the processing method of the water-splashing prevention and soil release leather comprises the following steps of: s1: drying, grinding and tumbling the leather material to obtain the leather material; s2: putting the leather obtained in the step S1 into a water-repellent aftertreatment agent for padding; s3: putting the leather dipped and pricked in the step S2 into a drying device for drying; s4: and (3) rolling and warehousing the dried leather in the step (S3) to obtain the water-splashing-preventing and soil-release leather. The water-splashing-preventing and soil-release leather prepared by the method has super waterproof performance and oil-proof performance, and does not damage the texture of the leather.
Description
Technical Field
The invention relates to the technical field of leather treatment, in particular to water-splashing prevention and soil release leather and a processing method thereof.
Background
The common leather is not waterproof, the durability, wearing applicability and universality of the leather are all restricted, and particularly when the leather is rainy, walked on a muddy road or dirt such as beverage is stained on articles such as leather shoes, clothing and the like which are not specially treated, the leather products are in an embarrassing situation, and the leather products are difficult to reprocess and recover as new. However, after the leather is treated by the common waterproof technology, the performances of ventilation, moisture absorption and the like of the leather are affected, and the waterproof effect is not satisfactory. Along with the higher and higher requirements of people on leather performance, a new production process is developed to enable leather to have better waterproof function, and the leather has wide market prospect.
Disclosure of Invention
Therefore, the invention aims to provide the water-splashing-preventing and soil-release leather and the processing method thereof, wherein the water-splashing-preventing and soil-release leather has super waterproof performance and oil-proof performance, and the texture of the leather is not damaged.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the water-splashing-preventing and soil-release leather comprises the following components in parts by weight: 8-12 parts of water-repellent aftertreatment agent and 80-100 parts of leather.
Preferably, the composition comprises the following components in parts by weight: 10 parts of water-repellent aftertreatment agent and 90 parts of leather.
A processing method of water-splashing-preventing and soil-release leather comprises the following steps:
s1: drying, grinding and tumbling the leather material to obtain the leather material;
s2: putting the leather obtained in the step S1 into a water-repellent aftertreatment agent for padding;
s3: putting the leather dipped and pricked in the step S2 into a drying device for drying;
s4: and (3) rolling and warehousing the dried leather in the step (S3) to obtain the water-splashing-preventing and soil-release leather.
Preferably, the preparation method of the water-repellent post-treatment agent in the step S2 specifically includes the following steps:
s21: modifying nano silicon dioxide;
s22: and preparing a first composite solution and a second composite solution, and mixing the first composite solution and the second composite solution to obtain the water-splashing-preventing aftertreatment.
Preferably, the specific method for modifying the nano silica in the step S21 is as follows:
adding KH-560 into ethanol solution of nano-silica, and stirring for 12h to obtain epoxy modified nano-silica solution;
adding KH-550 into ethanol solution of nano-silica, and stirring for 12h to obtain amino modified nano-silica solution.
Preferably, the mass fraction of the ethanol solution of the nano silicon dioxide is 75-80%, the weight part ratio of KH-560 to the ethanol solution of the nano silicon dioxide is 1:15, and the weight part ratio of KH-550 to the ethanol solution of the nano silicon dioxide is 1:15.
Preferably, the specific method of the water-repellent post-treatment agent in step S22 is as follows:
dissolving polydimethylsiloxane in a mixed solution consisting of n-hexane and absolute ethyl alcohol, ultrasonically stirring for 30min to obtain a polydimethylsiloxane ethanol solution, then mixing the epoxy group modified nano silicon dioxide solution prepared in the step S21 with the polydimethylsiloxane ethanol solution, and ultrasonically stirring for 30min to obtain a first composite solution;
dissolving polyvinylpyrrolidone in an absolute ethyl alcohol solution, ultrasonically stirring for 30min to obtain a polyvinylpyrrolidone ethyl alcohol solution, then mixing the amino modified nano silicon dioxide solution prepared in the step S21 with the polyvinylpyrrolidone ethyl alcohol solution, and ultrasonically stirring for 30min to obtain a second composite solution;
and mixing the first composite solution and the second composite solution to obtain the water-repellent aftertreatment.
Preferably, the weight part ratio of the polydimethylsiloxane, the n-hexane and the absolute ethyl alcohol is 1:5:5, and the weight part ratio of the epoxy group modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1;
the weight ratio of polyvinylpyrrolidone to absolute ethyl alcohol is 1:10, and the weight ratio of the amino modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1.
Preferably, the process parameters of the infusion in step S2 are: the padding pressure is 0.4-0.6Mpa.
Preferably, the process parameters of the drying in step S3 are: and (3) high-temperature drying: the baking temperature is 100-120 ℃, and the baking time is 5 minutes per code; two-stage high-temperature drying: the baking temperature is 140-170 ℃, and the baking time is 5 minutes per code.
According to the invention, after the nano silicon dioxide is modified by amino groups and epoxy groups respectively, the nano silicon dioxide is loaded on a polyvinylpyrrolidone surface modified nano silicon dioxide particle chain skeleton by using low-surface energy polydimethylsiloxane as an adhesive, and finally self-assembled under covalent action to form nano silicon dioxide composite particles, and meanwhile, the micro-nano structure can be protected, so that the water-repellent aftertreatment agent keeps super-hydrophobicity.
In the drying process, the leather is subjected to certain partial plastic deformation in the heating process, and the immersed and pressed composite particles are partially embedded into the surface of the leather so as to enhance the interface interaction and bridging effect with the leather, so that the leather has higher waterproofness and easy decontamination.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the raw materials and the equipment according to the present invention are commercially available, and are not specifically exemplified, and the raw materials according to the present invention are commercially available and are well known to those skilled in the art.
Embodiment one:
the water-splashing-preventing and soil-release leather comprises the following components in parts by weight: 12 parts of water-repellent aftertreatment agent and 100 parts of leather.
A processing method of water-splashing-preventing and soil-release leather comprises the following steps:
s1: drying, grinding and tumbling the leather material to obtain the leather material;
s2: putting the leather obtained in the step S1 into a water-repellent post-treatment agent for padding, wherein the padding pressure is 0.6Mpa;
s3: putting the soaked leather in the step S2 into a drying device for drying, wherein the drying process parameters are as follows: and (3) high-temperature drying: the baking temperature is 100 ℃, and the baking time is 5 minutes per code; two-stage high-temperature drying: the baking temperature is 170 ℃, the baking time is 5 minutes per code, and the temperature difference between primary baking and secondary baking is set at 70 ℃;
s4: and (3) rolling and warehousing the dried leather in the step (S3) to obtain the water-splashing-preventing and soil-release leather.
The preparation method of the water-repellent aftertreatment in the step S2 specifically comprises the following steps:
s21: adding KH-560 into an ethanol solution of nano-silica with the mass fraction of 80%, wherein the weight ratio of KH-560 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an epoxy modified nano-silica solution;
adding KH-550 into an ethanol solution of nano-silica with the mass fraction of 80%, wherein the weight ratio of KH-550 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an amino modified nano-silica solution;
s22: dissolving polydimethylsiloxane in a mixed solution consisting of n-hexane and absolute ethyl alcohol, wherein the weight ratio of the polydimethylsiloxane to the n-hexane to the absolute ethyl alcohol is 1:5:5, ultrasonically stirring for 30min to obtain a polydimethylsiloxane ethanol solution, then mixing the epoxy modified nano silicon dioxide solution prepared in the step S21 with the polydimethylsiloxane ethanol solution, wherein the weight ratio of the epoxy modified nano silicon dioxide solution to the polydimethylsiloxane ethanol solution is 1:1, and ultrasonically stirring for 30min to obtain a first composite solution;
dissolving polyvinylpyrrolidone in an absolute ethyl alcohol solution, wherein the weight ratio of the polyvinylpyrrolidone to the absolute ethyl alcohol is 1:10, ultrasonically stirring for 30min to obtain the polyvinylpyrrolidone ethyl alcohol solution, then mixing the amino modified nano silicon dioxide solution prepared in the step S21 with the polyvinylpyrrolidone ethyl alcohol solution, wherein the weight ratio of the amino modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1, and ultrasonically stirring for 30min to obtain a second composite solution;
and mixing the first composite solution and the second composite solution to obtain the water-repellent aftertreatment, wherein the mixing volume ratio of the first composite solution to the second composite solution is 1:1.
Embodiment two:
the water-splashing-preventing and soil-release leather comprises the following components in parts by weight: 8 parts of water-repellent aftertreatment agent and 80 parts of leather.
A processing method of water-splashing-preventing and soil-release leather comprises the following steps:
s1: drying, grinding and tumbling the leather material to obtain the leather material;
s2: putting the leather obtained in the step S1 into a water-repellent post-treatment agent for padding, wherein the padding pressure is 0.4Mpa;
s3: putting the soaked leather in the step S2 into a drying device for drying, wherein the drying process parameters are as follows: and (3) high-temperature drying: the baking temperature is 100 ℃, and the baking time is 5 minutes per code; two-stage high-temperature drying: the baking temperature is 140 ℃, the baking time is 5 minutes per code, and the temperature difference between primary baking and secondary baking is set at 40 ℃;
s4: and (3) rolling and warehousing the dried leather in the step (S3) to obtain the water-splashing-preventing and soil-release leather.
The preparation method of the water-repellent aftertreatment in the step S2 specifically comprises the following steps:
s21: adding KH-560 into an ethanol solution of nano-silica with the mass fraction of 75%, wherein the weight ratio of KH-560 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an epoxy modified nano-silica solution;
adding KH-550 into ethanol solution of nano-silica with mass fraction of 75%, wherein the weight ratio of KH-550 to ethanol solution of nano-silica is 1:15, and stirring for 12h to obtain amino modified nano-silica solution;
s22: dissolving polydimethylsiloxane in a mixed solution consisting of n-hexane and absolute ethyl alcohol, wherein the weight ratio of the polydimethylsiloxane to the n-hexane to the absolute ethyl alcohol is 1:5:5, ultrasonically stirring for 30min to obtain a polydimethylsiloxane ethanol solution, then mixing the epoxy modified nano silicon dioxide solution prepared in the step S21 with the polydimethylsiloxane ethanol solution, wherein the weight ratio of the epoxy modified nano silicon dioxide solution to the polydimethylsiloxane ethanol solution is 1:1, and ultrasonically stirring for 30min to obtain a first composite solution;
dissolving polyvinylpyrrolidone in an absolute ethyl alcohol solution, wherein the weight ratio of the polyvinylpyrrolidone to the absolute ethyl alcohol is 1:10, ultrasonically stirring for 30min to obtain the polyvinylpyrrolidone ethyl alcohol solution, then mixing the amino modified nano silicon dioxide solution prepared in the step S21 with the polyvinylpyrrolidone ethyl alcohol solution, wherein the weight ratio of the amino modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1, and ultrasonically stirring for 30min to obtain a second composite solution;
and mixing the first composite solution and the second composite solution to obtain the water-repellent aftertreatment, wherein the mixing volume ratio of the first composite solution to the second composite solution is 1:1.
Embodiment III:
the water-splashing-preventing and soil-release leather comprises the following components in parts by weight: 10 parts of water-repellent aftertreatment agent and 90 parts of leather.
A processing method of water-splashing-preventing and soil-release leather comprises the following steps:
s1: drying, grinding and tumbling the leather material to obtain the leather material;
s2: putting the leather obtained in the step S1 into a water-repellent post-treatment agent for padding, wherein the padding pressure is 0.5Mpa;
s3: putting the soaked leather in the step S2 into a drying device for drying, wherein the drying process parameters are as follows: and (3) high-temperature drying: the baking temperature is 100 ℃, and the baking time is 5 minutes per code; two-stage high-temperature drying: the baking temperature is 160 ℃, the baking time is 5 minutes per code, and the temperature difference between primary baking and secondary baking is set at 60 ℃;
s4: and (3) rolling and warehousing the dried leather in the step (S3) to obtain the water-splashing-preventing and soil-release leather.
The preparation method of the water-repellent aftertreatment in the step S2 specifically comprises the following steps:
s21: adding KH-560 into an ethanol solution of nano-silica with the mass fraction of 78%, wherein the weight ratio of KH-560 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an epoxy modified nano-silica solution;
adding KH-550 into an ethanol solution of nano-silica with the mass fraction of 78%, wherein the weight ratio of KH-550 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an amino modified nano-silica solution;
s22: dissolving polydimethylsiloxane in a mixed solution consisting of n-hexane and absolute ethyl alcohol, wherein the weight ratio of the polydimethylsiloxane to the n-hexane to the absolute ethyl alcohol is 1:5:5, ultrasonically stirring for 30min to obtain a polydimethylsiloxane ethanol solution, then mixing the epoxy modified nano silicon dioxide solution prepared in the step S21 with the polydimethylsiloxane ethanol solution, wherein the weight ratio of the epoxy modified nano silicon dioxide solution to the polydimethylsiloxane ethanol solution is 1:1, and ultrasonically stirring for 30min to obtain a first composite solution;
dissolving polyvinylpyrrolidone in an absolute ethyl alcohol solution, wherein the weight ratio of the polyvinylpyrrolidone to the absolute ethyl alcohol is 1:10, ultrasonically stirring for 30min to obtain the polyvinylpyrrolidone ethyl alcohol solution, then mixing the amino modified nano silicon dioxide solution prepared in the step S21 with the polyvinylpyrrolidone ethyl alcohol solution, wherein the weight ratio of the amino modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1, and ultrasonically stirring for 30min to obtain a second composite solution;
and mixing the first composite solution and the second composite solution to obtain the water-repellent aftertreatment, wherein the mixing volume ratio of the first composite solution to the second composite solution is 1:1.
Comparative example 1:
comparative example 1 is basically the same as the processing method of example 1, except that the modified nano silica solution is directly used without the complex treatment of the modified nano silica solution, specifically:
the water-splashing-preventing and soil-release leather comprises the following components in parts by weight: 12 parts of water-repellent aftertreatment agent and 100 parts of leather.
A processing method of water-splashing-preventing and soil-release leather comprises the following steps:
s1: drying, grinding and tumbling the leather material to obtain the leather material;
s2: putting the leather obtained in the step S1 into a water-repellent post-treatment agent for padding, wherein the padding pressure is 0.6Mpa;
s3: putting the soaked leather in the step S2 into a drying device for drying, wherein the drying process parameters are as follows: and (3) high-temperature drying: the baking temperature is 100 ℃, and the baking time is 5 minutes per code; two-stage high-temperature drying: the baking temperature is 170 ℃, the baking time is 5 minutes per code, and the temperature difference between primary baking and secondary baking is set at 70 ℃;
s4: and (3) rolling and warehousing the dried leather in the step (S3) to obtain the water-splashing-preventing and soil-release leather.
The preparation method of the water-repellent aftertreatment in the step S2 specifically comprises the following steps:
s21: adding KH-560 into an ethanol solution of nano-silica with the mass fraction of 80%, wherein the weight ratio of KH-560 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an epoxy modified nano-silica solution;
adding KH-550 into an ethanol solution of nano-silica with the mass fraction of 80%, wherein the weight ratio of KH-550 to the ethanol solution of nano-silica is 1:15, and stirring for 12 hours to obtain an amino modified nano-silica solution;
s22: and mixing the epoxy modified nano silicon dioxide solution and the amino modified nano silicon dioxide solution to obtain the water-splashing prevention aftertreatment agent, wherein the mixing volume ratio of the epoxy modified nano silicon dioxide solution to the amino modified nano silicon dioxide solution is 1:1.
The water repellent performance, the water pick-up test and the oil repellent performance test were carried out on the water repellent leather of examples 1 to 3, commercially available Dongguan Han lion leather Co., ltd., and the leather obtained in comparative example 1, respectively.
Water-splashing prevention test: water repellency tests were performed by a water pick-up meter GT-7033N (Standard ASTM-D1913-2000); notice that: 1. 250mL of water must be sprayed over 25-30 seconds; 2. the sample support forms an angle of 45 degrees with the horizontal plane; 3. the center of the lower surface of the nozzle is kept at a distance of 152.4mm from the center of the surface of the sample; 4. and in the test process, the detection instrument is prevented from being released by hands so as not to influence the experimental result.
And (3) water dipping test: AATCC22-2005 spray method for testing water repellency of textiles.
Oil repellency test: the test was carried out according to AATCC118 (oil-proof) standard of 3M company in America. The standard oil in AATCC118 is used as test oil, a dropper is used for dripping test oil drops on the surface of leather, the leather area is 20cm multiplied by 20cm, the drop diameter is 3mm, 3 drops are dripped on different parts of the leather, the observation is carried out for 30 seconds, 2 drops in the oil drops on each part are not absorbed, namely, the oil drops pass through, the low-grade oil is firstly detected, and then the high-grade oil is detected until the oil drops cannot pass through.
Table 1: test data for the leather of examples 1-3, commercially available waterproof leather and comparative example 1
From the above table, the dynamic waterproof performance and the water dipping grade of the examples 1-3 are improved compared with those of the comparative example 1, and the dynamic waterproof performance of the examples 1 and 3 is also improved compared with that of the commercial waterproof leather, which indicates that the fabric provided by the invention has excellent water splashing preventing performance and antifouling performance, and has higher practicability. In addition, the dynamic waterproof performance of the embodiment 1 and the embodiment 3 is slightly improved compared with that of the embodiment 2, because the proportion of the composite particles embedded into the surface of leather is slightly increased when the temperature difference between the two-stage high-temperature drying and the one-stage drying is more than 50 ℃ in the drying process, and the waterproof performance of the leather is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The processing method of the water-splashing-preventing and soil-release leather is characterized by comprising the following steps of:
s1: drying, grinding and tumbling the leather material to obtain the leather material;
s2: putting the leather obtained in the step S1 into a water-repellent aftertreatment agent for padding;
s3: putting the leather dipped and pricked in the step S2 into a drying device for drying;
s4: rolling and warehousing the leather dried in the step S3 to obtain the water-splashing-preventing and soil-release leather;
the preparation method of the water-splashing prevention aftertreatment agent in the step S2 specifically comprises the following steps:
s21: modifying nano silicon dioxide;
s22: preparing a first composite solution and a second composite solution, and mixing the first composite solution and the second composite solution to obtain a water-splashing prevention aftertreatment;
the specific method for modifying the nano silicon dioxide in the step S21 is as follows:
adding KH-560 into ethanol solution of nano-silica, and stirring for 12h to obtain epoxy modified nano-silica solution;
adding KH-550 into ethanol solution of nano-silica, and stirring for 12h to obtain amino modified nano-silica solution;
the mass fraction of the ethanol solution of the nano silicon dioxide is 75-80%, the weight part ratio of KH-560 to the ethanol solution of the nano silicon dioxide is 1:15, and the weight part ratio of KH-550 to the ethanol solution of the nano silicon dioxide is 1:15;
the specific method of the water-repellent aftertreatment agent in the step S22 is as follows:
dissolving polydimethylsiloxane in a mixed solution consisting of n-hexane and absolute ethyl alcohol, ultrasonically stirring for 30min to obtain a polydimethylsiloxane ethanol solution, then mixing the epoxy group modified nano silicon dioxide solution prepared in the step S21 with the polydimethylsiloxane ethanol solution, and ultrasonically stirring for 30min to obtain a first composite solution;
dissolving polyvinylpyrrolidone in an absolute ethyl alcohol solution, ultrasonically stirring for 30min, then mixing the amino modified nano silicon dioxide solution prepared in the step S21 with the polyvinylpyrrolidone ethyl alcohol solution, and ultrasonically stirring for 30min to obtain a polyvinylpyrrolidone ethyl alcohol solution to obtain a second composite solution;
mixing the first composite solution and the second composite solution to obtain a water-splashing prevention aftertreatment;
the water-splashing-preventing and soil-release leather comprises the following components in parts by weight: 8-12 parts of water-repellent aftertreatment agent and 80-100 parts of leather.
2. The processing method of the water-repellent easy-to-clean leather according to claim 1, wherein the water-repellent easy-to-clean leather comprises the following components in parts by weight: 10 parts of water-repellent aftertreatment agent and 90 parts of leather.
3. The processing method of the water-repellent easy-to-clean leather according to claim 1, wherein the weight ratio of the polydimethylsiloxane, the n-hexane and the absolute ethyl alcohol is 1:5:5, and the weight ratio of the epoxy modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1;
the weight ratio of polyvinylpyrrolidone to absolute ethyl alcohol is 1:10, and the weight ratio of the amino modified nano silicon dioxide solution to the polydimethylsiloxane ethyl alcohol solution is 1:1.
4. The processing method of the water-repellent and soil-release leather according to claim 1, wherein the technological parameters of the padding in the step S2 are as follows: the padding pressure is 0.4-0.6Mpa.
5. The processing method of the water-repellent easy-to-clean leather according to claim 1, wherein the drying process parameters in the step S3 are as follows: and (3) high-temperature drying: the baking temperature is 100-120 ℃, and the baking time is 5 minutes per code; two-stage high-temperature drying: the baking temperature is 140-170 ℃, and the baking time is 5 minutes per code.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101250596A (en) * | 2008-03-13 | 2008-08-27 | 陕西科技大学 | Preparation method of self-cleaning leather or product containing nano functional material |
| CN108660768A (en) * | 2018-05-31 | 2018-10-16 | 浙江映山红纺织科技有限公司 | A kind of preparation method of spill resistant free-floride dyed yarn |
| CN111534650A (en) * | 2020-05-20 | 2020-08-14 | 杭州天龙手袋股份有限公司 | Durable antibacterial soft leather for leather bags and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6753369B2 (en) * | 2001-10-16 | 2004-06-22 | Buckman Laboratories International, Inc. | Leather waterproofing formulation and leather goods waterproofed therewith |
| US7056449B2 (en) * | 2002-08-14 | 2006-06-06 | Rohm And Haas Company | Aqueous silica dispersion |
| DE102012201167A1 (en) * | 2012-01-27 | 2013-08-01 | Evonik Industries Ag | Mixture composition containing amino-functional siloxanes, hydrophobic particles and high molecular weight silicones and its use for leather treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250596A (en) * | 2008-03-13 | 2008-08-27 | 陕西科技大学 | Preparation method of self-cleaning leather or product containing nano functional material |
| CN108660768A (en) * | 2018-05-31 | 2018-10-16 | 浙江映山红纺织科技有限公司 | A kind of preparation method of spill resistant free-floride dyed yarn |
| CN111534650A (en) * | 2020-05-20 | 2020-08-14 | 杭州天龙手袋股份有限公司 | Durable antibacterial soft leather for leather bags and preparation method thereof |
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