CN121183599A - A method for preparing microfiber synthetic leather - Google Patents

A method for preparing microfiber synthetic leather

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Publication number
CN121183599A
CN121183599A CN202511735567.8A CN202511735567A CN121183599A CN 121183599 A CN121183599 A CN 121183599A CN 202511735567 A CN202511735567 A CN 202511735567A CN 121183599 A CN121183599 A CN 121183599A
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synthetic leather
weight
zone
parts
preparing
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张日新
黄计生
陈劲草
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Quanzhou Xufeng Super Fiber Co ltd
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Quanzhou Xufeng Super Fiber Co ltd
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Abstract

The invention relates to the technical field of preparation of synthetic leather, and provides a preparation method of superfine fiber synthetic leather, which solves the defect of poor moisture permeability and antibacterial property of the existing superfine fiber synthetic leather and comprises the following preparation steps of (1) raw material selection, (2) melt spinning, (3) mixing and carding the microporous polyester fiber and polyester fiber obtained in the step (2) according to the weight ratio of 70:30-60:40 to form a net, and then preparing the net into a non-woven fabric through needling, (4) carrying out oxygen plasma treatment on the non-woven fabric obtained in the step (3) for 2min-5min, controlling the power at 50W-200W and the air pressure at 50Pa-100Pa, (5) sending the non-woven fabric after the oxygen plasma treatment into a padding tank for padding treatment, (6) scraping aqueous polyurethane, (7) drying, (8) alkali treatment, (9) washing, neutralizing, drying and shaping and post finishing.

Description

Preparation method of superfine fiber synthetic leather
Technical Field
The invention relates to the technical field of preparation of synthetic leather, in particular to a preparation method of superfine fiber synthetic leather.
Background
The superfine fiber synthetic leather is a polymer composite material imitating the structure and performance of natural leather, and is widely applied to the fields of shoe wear, bags, furniture, automobile interiors and the like due to the characteristics of soft hand feeling, air and moisture permeability, excellent physical properties and the like. The conventional preparation method mainly comprises the following steps of firstly preparing superfine fibers (such as nylon 6 (PA 6)/Polyethylene (PE) or Polyester (PET)/Polyethylene (PE) blend fibers) into a non-woven fabric with a three-dimensional network structure through processes of carding, lapping, needling and the like, then soaking the non-woven fabric into Polyurethane (PU) resin solution, performing processes of wet solidification, solvent extraction and the like to enable PU to form a matrix with a continuous porous structure in a fiber network, simultaneously dissolving and removing sea components through a subsequent fiber reduction (splitting) process to enable island components to be dispersed to form superfine fibers, thus obtaining a substrate with a microporous polyurethane matrix and superfine fiber bundles, and finally giving the final appearance and hand feeling to the substrate through post-finishing processes of dry transfer coating, surface embossing, skin grinding and the like. However, the superfine fiber synthetic leather obtained by the existing preparation method has common moisture permeability and antibacterial performance.
The Chinese patent publication No. CN107627689B discloses biomass superfine fiber synthetic leather which sequentially comprises a nano coating, a biomass superfine fiber surface layer and an anti-odor base fabric from top to bottom, wherein the nano coating comprises, by weight, 5-10 parts of nano titanium dioxide, 10-20 parts of nickel-based alloy, 100-120 parts of nano far infrared ceramic powder, 20-40 parts of molybdenum phenolic resin and 5-15 parts of aminosilane, the biomass superfine fiber surface layer comprises, by weight, 50-70 parts of spider silk, 30-45 parts of silk and 70-90 parts of waterborne polyurethane, the particle size of nano titanium dioxide is 10-25 nm, the spider silk and silk are three-dimensionally crosslinked to form a collagen-like fiber structure, the waterborne polyurethane is distributed on the periphery of the spider silk and silk, the waterborne polyurethane is a three-dimensional reticular structure with a foaming structure, and the foaming structure is staggered and communicated to form a fine permeable structure. The patent adopts biomass materials such as spider silk, silk and the like to be combined with the functional nano material, is more environment-friendly and sustainable than the traditional petroleum-based ultrafine fiber, has antibacterial property, meets the requirements of the market on natural and healthy products, but the spider silk which is the raw material used by the patent cannot be produced in a large scale in an industrialized manner, so that the raw material is difficult to obtain and has high cost.
Disclosure of Invention
Therefore, the invention provides a preparation method of superfine fiber synthetic leather, aiming at the problems, and solving the defects of poor moisture permeability and antibacterial performance of the existing superfine fiber synthetic leather.
In order to achieve the aim, the preparation method of the superfine fiber synthetic leather adopts the following technical scheme that the preparation method comprises the following preparation steps:
(1) The raw materials are selected from 100 to 110 weight parts of terylene master batch and 5 to 10 weight parts of sodium bicarbonate particles;
(2) Melt spinning, namely sending the polyester master batch and sodium bicarbonate particles into a screw extruder for melt spinning to obtain polyester fibers with micropores;
(3) Mixing the microporous polyester fibers obtained in the step (2) with polyester fibers according to the weight ratio of 70:30-60:40, carding to form a net, and then preparing a non-woven fabric by needling;
(4) Carrying out oxygen plasma treatment on the non-woven fabric obtained in the step (3), wherein the treatment time is 2-5 min, the power is controlled to be 50-200W, and the air pressure is controlled to be 50-100 Pa;
(5) The non-woven fabric after oxygen plasma treatment is sent into a padding tank for padding treatment, then water washing and pre-drying are carried out, an antibacterial treatment liquid is placed in the padding tank in advance, the antibacterial treatment liquid consists of 3-5 parts by weight of quaternized chitosan, 2-3 parts by weight of zinc phytate, 3-4 parts by weight of PAMAM, 1-3 parts by weight of citric acid, 0.2-0.5 part by weight of penetrating agent and 84.5-90.8 parts by weight of deionized water, and the pre-drying treatment process comprises the steps of firstly heating to 100-120 ℃ for 3-5 min, then heating to 150-155 ℃ for 3-5 min;
(6) Blade coating aqueous polyurethane, wherein the thickness of the coating is controlled to be 0.15mm-0.25mm, and the synthetic leather coated with polyurethane is obtained;
(7) Drying, namely treating the synthetic leather coated with the polyurethane at 70-80 ℃ for 10-12 min;
(8) Alkali treatment, namely immersing the synthetic leather subjected to the drying treatment in the step (7) into a NaOH solution with the mass concentration of 4% -6%, and treating for 20-25 min at 60-70 ℃ to dissolve PE sea components in the fibers;
(9) Washing with water, neutralizing, drying, shaping and finishing.
The preparation process of the waterborne polyurethane in the step (6) comprises the steps of a, adding polyester diol with the molecular weight of 2000-3000, isophorone diisocyanate and hydrophilic chain extender dimethylolpropionic acid into a reaction kettle according to the weight ratio of 100:40:8-100:25:4, reacting for 1.5h-2h at 75-80 ℃, b, adding acetone to reduce the viscosity, then adding glycol chain extender containing nano SiO 2 sol, sodium bicarbonate particles and PEG, continuing to react for 1 h-1.5 h, C, cooling to 40 ℃, adding triethylamine to neutralize, adding water to emulsify under high-speed shearing, and finally decompressing and distilling to remove the acetone.
Further, in the step (2), the temperature section of the screw extruder is divided into a first zone, a second zone, a third zone and a fourth zone, wherein the temperature of the first zone is 260-265 ℃, the temperature of the second zone is 270-275 ℃, the temperature of the third zone is 278-280 ℃, the temperature of the fourth zone is 265-270 ℃, and the spinning speed is 1000-2000 m/min.
Further, in the step (5), the non-woven fabric is subjected to two-soaking and two-rolling treatment in a soaking tank, and the soaking time is 5-8 min.
The specific processes of water washing, neutralization, drying and shaping and finishing processing in the step (9) are that deionized water is firstly used for washing for 15min to 20min to neutrality at the temperature of 40 ℃ to 50 ℃, then drying and shaping is carried out at the temperature of 140 ℃ to 150 ℃, and finally the surface grinding, dyeing, dry film transferring and embossing treatment are carried out.
Further, in the step (3), the needling density is 800 needles/cm 2 -1200 needles/cm 2, and the gram weight of the non-woven fabric is 120g/m 2-200g/m2.
Further, the particle size of the nano SiO 2 in the nano SiO 2 sol is 10nm-50nm.
Further, the particle diameter of the sodium bicarbonate particles is 2-5 μm.
Further, the molecular weight of the PEG is 2000-5000.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the fiber raw material used for the base cloth non-woven fabric is added with sodium bicarbonate particles, the sodium bicarbonate particles are foamed in situ to form micropores in the melt spinning process, an active group is introduced by combining oxygen plasma treatment, then a long-acting antibacterial function is endowed by soaking and binding an antibacterial treatment liquid, and finally a multistage pore structure is formed by alkali treatment, so that the synthetic leather has excellent moisture permeability and antibacterial property, and the production process is environment-friendly and sustainable.
2. The nano SiO 2, sodium bicarbonate particles and PEG composite pore-forming agent are introduced into the waterborne polyurethane, a micro-channel structure is formed through a thermal phase separation-alkali decrement synergistic pore-forming mechanism, the moisture permeability is remarkably improved, meanwhile, the nano SiO 2 is added to construct a three-dimensional cross-linked network in the polyurethane, the problem that resin migrates to the surface along with the evaporation of water in the film forming process is solved, the resin is distributed more uniformly, and the film forming uniformity and the mechanical property of the polyurethane are improved.
3. Further, a two-soaking and two-rolling process is adopted, the soaking time is controlled to be 5-8min, the antibacterial treatment liquid is ensured to fully permeate into the non-woven fabric, the PAMAM dendritic polymer fully reacts with the fiber surface active groups, the firm combination of antibacterial components is realized, and the problem that the antibacterial agent dissolves out too quickly in the subsequent use process is avoided.
Detailed Description
Example 1
The preparation method of the superfine fiber synthetic leather comprises the following preparation steps:
(1) The raw materials are selected by taking 100 parts by weight of terylene master batch and 5 parts by weight of sodium bicarbonate particles with the particle size of 2 mu m as raw materials;
(2) Melt spinning, namely feeding the polyester master batch and sodium bicarbonate particles into a screw extruder for melt spinning to obtain microporous polyester fibers, wherein the temperature section of the screw extruder is divided into a first zone, a second zone, a third zone and a fourth zone, the temperature of the first zone is 260 ℃, the temperature of the second zone is 270 ℃, the temperature of the third zone is 278 ℃, the temperature of the fourth zone is 265 ℃, and the spinning speed is 1000m/min;
(3) Mixing the microporous polyester fibers obtained in the step (2) with polyester fibers according to the weight ratio of 70:30, carding to form a net, and then preparing a non-woven fabric by needling, wherein the needling density is 800 needles/cm < 2 >, and the gram weight of the non-woven fabric is 120g/m 2;
(4) Carrying out oxygen plasma treatment on the non-woven fabric obtained in the step (3), wherein the treatment time is 2min, the power is controlled to be 50W, and the air pressure is controlled to be 50Pa;
(5) The non-woven fabric after oxygen plasma treatment is sent into a padding tank for two-soaking and two-rolling treatment, the dipping time is 5min, then water washing is carried out, and pre-drying is carried out, wherein an antibacterial treatment liquid is placed in the padding tank in advance, the antibacterial treatment liquid consists of the following raw materials, by weight, 3 parts of quaternized chitosan, 2 parts of zinc phytate, 3 parts of PAMAM, 1 part of citric acid, 0.2 part of penetrating agent and 90.8 parts of deionized water, and the pre-drying treatment process comprises the steps of firstly heating to 100 ℃, keeping for 3min, then heating to 150 ℃ and keeping for 3min;
(6) The preparation process of the waterborne polyurethane comprises the steps of a, adding polyester glycol with the molecular weight of 2000, isophorone diisocyanate and a hydrophilic chain extender dimethylolpropionic acid into a reaction kettle according to the weight ratio of 100:40:8, reacting for 1.5h at 75 ℃, b, adding acetone to reduce the viscosity, then adding a glycol chain extender containing nano SiO 2 sol with the particle size of 10nm, sodium bicarbonate particles with the particle size of 2 mu m and PEG with the molecular weight of 2000, continuing to react for 1 hour, C, cooling to 40 ℃, adding triethylamine to neutralize, adding water to emulsify under high-speed shearing, and finally decompressing and distilling to remove the acetone;
(7) Drying, namely treating the synthetic leather coated with the polyurethane at 70 ℃ for 10min;
(8) Alkali treatment, namely immersing the synthetic leather subjected to the drying treatment in the step (7) into a NaOH solution with the mass concentration of 4%, and treating for 20min at 60 ℃ to dissolve PE sea components in the fibers;
(9) Washing with deionized water for 15min at 40 ℃ to neutrality, drying and shaping at 140 ℃, and finally carrying out surface grinding, dyeing, dry film transferring and embossing.
Example two
The preparation method of the superfine fiber synthetic leather comprises the following preparation steps:
(1) Raw materials are selected by taking 105 weight parts of polyester master batch and 7 weight parts of sodium bicarbonate particles with the particle size of 4 mu m as raw materials;
(2) Melt spinning, namely feeding the polyester master batch and sodium bicarbonate particles into a screw extruder for melt spinning to obtain microporous polyester fibers, wherein the temperature section of the screw extruder is divided into a first zone, a second zone, a third zone and a fourth zone, the temperature of the first zone is 23 ℃, the temperature of the second zone is 273 ℃, the temperature of the third zone is 279 ℃, the temperature of the fourth zone is 268 ℃, and the spinning speed is 1500m/min;
(3) Mixing the microporous polyester fibers obtained in the step (2) with polyester fibers according to the weight ratio of 70:30-60:40, carding to form a net, and then preparing a non-woven fabric by needling, wherein the needling density is 1000 needles/cm 2, and the gram weight of the non-woven fabric is 180g/m 2;
(4) Carrying out oxygen plasma treatment on the non-woven fabric obtained in the step (3), wherein the treatment time is 3.5min, the power is controlled at 125W, and the air pressure is controlled at 75Pa;
(5) The non-woven fabric after oxygen plasma treatment is sent into a padding tank for two-soaking and two-rolling treatment, the dipping time is 6min, then water washing is carried out, and pre-drying is carried out, wherein an antibacterial treatment liquid is placed in the padding tank in advance, the antibacterial treatment liquid consists of the following raw materials, by weight, 4 parts of quaternized chitosan, 2.5 parts of zinc phytate, 3.5 parts of PAMAM, 2 parts of citric acid, 0.35 part of penetrating agent and 87.65 parts of deionized water, and the pre-drying treatment process comprises the steps of firstly heating to 110 ℃, keeping for 4min, heating to 153 ℃ and keeping for 4min;
(6) The preparation process of the waterborne polyurethane comprises the steps of a, adding polyester glycol with the molecular weight of 2000, isophorone diisocyanate and a hydrophilic chain extender dimethylolpropionic acid into a reaction kettle according to the weight ratio of 100:25:4, reacting for 1.8 hours at 78 ℃, b, adding acetone to reduce the viscosity, then adding a glycol chain extender containing nano SiO 2 sol with the particle size of 30nm, sodium bicarbonate particles with the particle size of 4 mu m and PEG with the molecular weight of 3500, continuing to react for 1.2 hours, C, cooling to 40 ℃, adding triethylamine to neutralize, adding water to emulsify under high-speed shearing, and finally decompressing and distilling to remove the acetone;
(7) Drying, namely treating the synthetic leather coated with the polyurethane at 75 ℃ for 11min;
(8) Alkali treatment, namely immersing the synthetic leather subjected to the drying treatment in the step (7) into a NaOH solution with the mass concentration of 5%, and treating for 22 minutes at 65 ℃ to dissolve PE sea components in the fibers;
(9) Washing with deionized water at 45 ℃ for 17min to neutrality, drying and shaping at 145 ℃, and finally carrying out surface grinding, dyeing, dry film transferring and embossing treatment.
Example III
The preparation method of the superfine fiber synthetic leather comprises the following preparation steps:
(1) The raw materials are selected by taking 110 weight parts of terylene master batch and 10 weight parts of sodium bicarbonate particles with the particle size of 5 mu m as raw materials;
(2) Melt spinning, namely feeding the polyester master batch and sodium bicarbonate particles into a screw extruder for melt spinning to obtain microporous polyester fibers, wherein the temperature section of the screw extruder is divided into a first zone, a second zone, a third zone and a fourth zone, the temperature of the first zone is 265 ℃, the temperature of the second zone is 275 ℃, the temperature of the third zone is 280 ℃, the temperature of the fourth zone is 270 ℃, and the spinning speed is 2000m/min;
(3) Mixing the microporous polyester fibers obtained in the step (2) with polyester fibers according to the weight ratio of 70:30-60:40, carding to form a net, and then preparing a non-woven fabric by needling, wherein the needling density is 1200 needles/cm 2, and the gram weight of the non-woven fabric is 200g/m 2;
(4) Carrying out oxygen plasma treatment on the non-woven fabric obtained in the step (3), wherein the treatment time is 5min, the power is controlled at 200W, and the air pressure is controlled at 100Pa;
(5) The non-woven fabric after oxygen plasma treatment is sent into a padding tank for two-soaking and two-rolling treatment, the dipping time is 8min, then water washing is carried out, and pre-drying is carried out, wherein an antibacterial treatment liquid is placed in the padding tank in advance, the antibacterial treatment liquid consists of the following raw materials, by weight, 5 parts of quaternized chitosan, 3 parts of zinc phytate, 4 parts of PAMAM, 3 parts of citric acid, 0.5 part of penetrating agent and the balance of deionized water, and the pre-drying treatment process comprises the steps of firstly heating to 120 ℃, keeping for 5min, then heating to 155 ℃ and keeping for 5min;
(6) The preparation process of the waterborne polyurethane comprises the steps of a, adding polyester glycol with the molecular weight of 3000, isophorone diisocyanate and a hydrophilic chain extender dimethylolpropionic acid into a reaction kettle according to the weight ratio of 100:25:4, reacting for 2 hours at 80 ℃, b, adding acetone to reduce the viscosity, then adding a glycol chain extender containing nano SiO 2 sol with the particle size of 50nm, sodium bicarbonate particles with the particle size of 5 mu m and PEG with the molecular weight of 5000, continuing to react for 1.5 hours, C, cooling to 40 ℃, adding triethylamine to neutralize, adding water to emulsify under high-speed shearing, and finally decompressing and distilling to remove the acetone;
(7) Drying, namely treating the synthetic leather coated with the polyurethane at 80 ℃ for 12min;
(8) Alkali treatment, namely immersing the synthetic leather subjected to the drying treatment in the step (7) into a NaOH solution with the mass concentration of 6%, and treating for 25 minutes at 70 ℃ to dissolve PE sea components in the fibers;
(9) Washing with deionized water at 50 ℃ for 20min to neutrality, drying and shaping at 150 ℃, and finally carrying out surface grinding, dyeing, dry film transferring and embossing.
Comparative example one
In the comparative example, 100 parts by weight of polyester master batch is taken as the raw material in the step (1), namely, sodium bicarbonate particles are not added, the oxygen plasma treatment in the step (4) is not needed, and the antibacterial treatment in the step (5) is not needed. The specific process is as follows:
A preparation method of superfine fiber synthetic leather comprises (1) selecting 100 weight parts of polyester master batch as raw material; (2) melt spinning, namely feeding the polyester master batch into a screw extruder for melt spinning to obtain polyester fibers; the temperature section of the screw extruder is divided into a first zone, a second zone, a third zone and a fourth zone, wherein the temperature of the first zone is 260 ℃, the temperature of the second zone is 270 ℃, the temperature of the third zone is 278 ℃, the temperature of the fourth zone is 265 ℃, and the spinning speed is 1000m/min; the preparation method of the polyurethane comprises the steps of (3) mixing polyester fibers obtained in the step (2) with polyester fibers according to the weight ratio of 70:30, carding to form a net, preparing a non-woven fabric through needling, wherein the needling density is 800 needles/cm < 2 >, the gram weight of the non-woven fabric is 120g/m < 2 >, (4) carrying out conventional water washing treatment on the non-woven fabric obtained in the step (3), (5) scraping aqueous polyurethane, wherein the thickness of a coating is controlled to be 0.15mm, obtaining polyurethane-coated synthetic leather, the preparation process of the aqueous polyurethane comprises the steps of a, adding polyester glycol with the molecular weight of 2000, isophorone diisocyanate and a hydrophilic chain extender dimethylolpropionic acid into a reaction kettle according to the weight ratio of 100:40:8, reacting for 1.5h at 75 ℃, b, adding acetone to reduce the viscosity, then adding ethylene glycol chain extender, continuing to react for 1 hour, C, cooling to 40 ℃, neutralizing by adding triethylamine, emulsifying by adding water under high-speed shearing, and finally distilling to remove acetone under reduced pressure, drying, wherein the synthetic leather coated with polyurethane is treated for 10min at 70 ℃, 7) carrying out alkali treatment, namely immersing the synthetic leather subjected to the step (6) into a 4% solution by mass concentration after the drying treatment, the method comprises the steps of (1) treating at 60 ℃ for 20min to dissolve PE sea components in the fibers, and (8) washing with water, neutralizing, drying and shaping and finishing, wherein the specific process comprises washing with deionized water at 40 ℃ for 15min to neutrality, drying and shaping at 140 ℃, and finally carrying out surface grinding, dyeing, dry film transfer and embossing.
Comparative example two
In the comparative example, 100 parts by weight of polyester master batch is taken as a raw material in the selection of the raw material in the step (1), no sodium carbonate particles are added in the preparation process of the waterborne polyurethane in the step (6), and other technical schemes are the same as those in the first example.
Comparative example three
The comparative example is the same as the first example in that no nano SiO 2 is added in the preparation process of the aqueous polyurethane in the step (6).
The properties of the products prepared in inventive examples one to three and comparative examples one to three were examined, and the results are shown in the following table:
Performance index Example 1 Example two Example III Comparative example one Comparative example two Comparative example three
Moisture permeability (g/m 2. 24 h) 4500 4800 5200 2800 3500 3800
Antibacterial ratio (Staphylococcus aureus,%) 99.9 99.9 99.9 75.3 98.5 98.8
Peel strength (N/3 cm) 113 126 145 83 97 106
Tear strength (N) 110 122 137 98 102 108
Air permeability (mm/s) 5.8 6.2 6.8 3.2 4.5 4.8
From the performance test data, the three examples are significantly better than the comparative examples in terms of moisture permeability, antibacterial property, mechanical properties, hydrophilicity, etc. In the third embodiment, the higher sodium bicarbonate particle content, the nano SiO 2 particle size and the PEG molecular weight are adopted, so that each performance reaches the optimal level. The worst performance of the first comparative example (conventional process) shows that the composite pore-forming technology and the antibacterial treatment process have obvious technical advantages. The properties of comparative example two (no sodium bicarbonate particles) and comparative example three (no nano SiO 2) were intermediate to those of example one and comparative example one, verifying the synergy of sodium bicarbonate particles and nano SiO 2 in constructing a hierarchical pore structure.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1.一种超细纤维合成革的制备方法，其特征在于，包括以下制备步骤：1. A method for preparing microfiber synthetic leather, characterized by comprising the following preparation steps: （1）原料选择：以涤纶母粒100重量份-110重量份、碳酸氢钠微粒5重量份-10重量份为原料；(1) Raw material selection: 100-110 parts by weight of polyester masterbatch and 5-10 parts by weight of sodium bicarbonate microparticles are used as raw materials; （2）熔融纺丝：将所述涤纶母粒、碳酸氢钠微粒送入螺杆挤出机熔融纺丝，得到带微孔的涤纶纤维；(2) Melt spinning: The polyester masterbatch and sodium bicarbonate microparticles are fed into a screw extruder for melt spinning to obtain polyester fibers with micropores; （3）将步骤（2）得到的带微孔的涤纶纤维与聚酯纤维按重量比为70:30-60:40混合，梳理成网，再通过针刺制成无纺布；(3) The microporous polyester fibers obtained in step (2) are mixed with polyester fibers in a weight ratio of 70:30-60:40, combed into a web, and then needle-punched into nonwoven fabric. （4）对步骤（3）获得的无纺布进行氧气等离子体处理，处理时间为2min-5min，功率控制在50W-200W，气压控制在50Pa-100Pa；(4) The non-woven fabric obtained in step (3) is subjected to oxygen plasma treatment for 2 min-5 min, with power controlled at 50 W-200 W and gas pressure controlled at 50 Pa-100 Pa. （5）将经氧气等离子体处理后的无纺布送入浸扎槽进行浸扎处理，而后进行水洗，预烘干，所述浸扎槽中预先放置有抗菌处理液，所述抗菌处理液由以下重量份的各原料组成：季铵化壳聚糖 3重量份-5重量份、 植酸锌 2重量份-3重量份、 PAMAM3重量份-4重量份、柠檬酸1重量份-3重量份、渗透剂0.2重量份-0.5重量份、去离子水84.5重量份-90.8重量份；预烘干处理过程为：先升温至100℃-120℃，保持3min-5min，再升温至150℃-155℃，保持3min-5min；(5) The nonwoven fabric treated with oxygen plasma is sent into the immersion tank for immersion treatment, then washed with water and pre-dried. The immersion tank is pre-filled with an antibacterial treatment solution, which is composed of the following raw materials in parts by weight: 3-5 parts by weight of quaternized chitosan, 2-3 parts by weight of zinc phytate, 3-4 parts by weight of PAMAM, 1-3 parts by weight of citric acid, 0.2-0.5 parts by weight of penetrant, and 84.5-90.8 parts by weight of deionized water. The pre-drying process is as follows: first heat up to 100℃-120℃ and hold for 3-5 minutes, then heat up to 150℃-155℃ and hold for 3-5 minutes. （6）刮涂水性聚氨酯，涂层厚度控制在0.15mm-0.25mm，获得涂布有聚氨酯的合成革；(6) Apply water-based polyurethane by scraping, with the coating thickness controlled at 0.15mm-0.25mm, to obtain synthetic leather coated with polyurethane; （7）烘干：将所述涂布有聚氨酯的合成革在70℃-80℃下处理10min-12min；(7) Drying: The polyurethane-coated synthetic leather is treated at 70℃-80℃ for 10min-12min; （8）碱处理：将经过步骤（7）烘干处理后的合成革浸入质量浓度为4%-6% 的NaOH溶液，60℃-70℃下处理20min-25min，溶解纤维中的PE海成分；(8) Alkali treatment: The synthetic leather after drying in step (7) is immersed in a NaOH solution with a mass concentration of 4%-6% and treated at 60℃-70℃ for 20min-25min to dissolve the PE sea components in the fiber; （9）水洗、中和、干燥定型及后整理加工。(9) Washing, neutralizing, drying and shaping and post-processing. 2.根据权利要求1所述的一种超细纤维合成革的制备方法，其特征在于：步骤（6）中所述水性聚氨酯的制备过程为：a、将分子量为2000-3000的聚酯二醇、异佛尔酮二异氰酸酯和亲水扩链剂二羟甲基丙酸按重量比为100:40:8-100：25:4加入反应釜，75℃-80℃下反应1.5h-2h；b、加入丙酮降低粘度，随后加入含有纳米SiO2溶胶的乙二醇扩链剂、碳酸氢钠微粒及PEG，继续反应1小时-1.5小时；c、降温至40℃，加入三乙胺中和，高速剪切下加水乳化，最后减压蒸馏除去丙酮。2. The method for preparing a microfiber synthetic leather according to claim 1, characterized in that: the preparation process of the waterborne polyurethane in step (6) is as follows: a. Polyester glycol with a molecular weight of 2000-3000, isophorone diisocyanate and hydrophilic chain extender dimethylolpropionic acid are added to the reaction vessel in a weight ratio of 100:40:8-100:25:4 and reacted at 75℃-80℃ for 1.5h-2h; b. Acetone is added to reduce the viscosity, followed by the addition of ethylene glycol chain extender containing nano- SiO2 sol, sodium bicarbonate particles and PEG, and the reaction is continued for 1 hour-1.5 hours; c. The temperature is lowered to 40℃, triethylamine is added for neutralization, water is added for emulsification under high-speed shearing, and finally acetone is removed by vacuum distillation. 3.根据权利要求1所述的一种超细纤维合成革的制备方法，其特征在于：步骤（2）中螺杆挤出机的温度区段分为一区、二区、三区及四区，所述一区温度为260℃-265℃、所述二区温度为270℃-275℃、所述三区温度为278℃-280℃、所述四区温度为265℃-270℃，纺丝速度：1000m/min-2000m/min。3. The method for preparing microfiber synthetic leather according to claim 1, characterized in that: the temperature zone of the screw extruder in step (2) is divided into zone one, zone two, zone three and zone four, wherein the temperature of zone one is 260℃-265℃, the temperature of zone two is 270℃-275℃, the temperature of zone three is 278℃-280℃, the temperature of zone four is 265℃-270℃, and the spinning speed is 1000m/min-2000m/min. 4.根据权利要求1所述的一种超细纤维合成革的制备方法，其特征在于：步骤（5）中，无纺布在浸扎槽中进行二浸二轧处理，浸渍时间为5min-8min。4. The method for preparing microfiber synthetic leather according to claim 1, characterized in that: in step (5), the nonwoven fabric is subjected to two dips and two squeezes in the immersion tank for 5 min-8 min. 5.根据权利要求1所述的一种超细纤维合成革的制备方法，其特征在于：步骤（9）中水洗、中和、干燥定型及后整理加工的具体过程为：先用去离子水在40℃-50℃下洗涤15min-20min至中性，然后在140℃-150℃下干燥定型，最后进行磨面、染色、干法移膜和压花处理。5. The method for preparing a microfiber synthetic leather according to claim 1, characterized in that: the specific process of washing, neutralizing, drying and shaping and finishing in step (9) is as follows: first, wash with deionized water at 40℃-50℃ for 15min-20min until neutral, then dry and shape at 140℃-150℃, and finally perform grinding, dyeing, dry transfer film and embossing treatment. 6.根据权利要求1所述的一种超细纤维合成革的制备方法，其特征在于：步骤（3）中针刺密度为800针/cm2-1200针/cm2，无纺布克重为120g/m2-200g/m2。6. The method for preparing a microfiber synthetic leather according to claim 1, characterized in that: the needle punching density in step (3) is 800 needles/ cm2-1200 needles/ cm2 , and the nonwoven fabric weight is 120g/ m2-200g / m2 . 7.根据权利要求2所述的一种超细纤维合成革的制备方法，其特征在于：所述纳米SiO2溶胶中纳米SiO2的粒径为10nm-50nm。7. The method for preparing microfiber synthetic leather according to claim 2, characterized in that: the particle size of nano- SiO2 in the nano- SiO2 sol is 10nm-50nm. 8.根据权利要求2所述的一种超细纤维合成革的制备方法，其特征在于：碳酸氢钠微粒的粒径为2μm-5μm。8. The method for preparing microfiber synthetic leather according to claim 2, characterized in that: the particle size of sodium bicarbonate microparticles is 2μm-5μm. 9.根据权利要求2所述的一种超细纤维合成革的制备方法，其特征在于：所述PEG的分子量为2000-5000。9. The method for preparing microfiber synthetic leather according to claim 2, wherein the molecular weight of the PEG is 2000-5000.
CN202511735567.8A 2025-11-25 2025-11-25 A method for preparing microfiber synthetic leather Pending CN121183599A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030104194A1 (en) * 2000-02-28 2003-06-05 Akira Honjo Process for producing porous object
CN102604115A (en) * 2012-02-22 2012-07-25 天津大学 Carboxymethyl chitosan quaternary ammonium salt/PAMAM(Polyamidoamine) core-shell nanoparticles and preparation method
CN103774455A (en) * 2012-10-15 2014-05-07 李翠平 Water-based polyurethane superfine fiber synthetic leather and preparation method thereof
CN118639444A (en) * 2024-06-26 2024-09-13 禾欣可乐丽超纤皮(嘉兴)有限公司 High-performance microfiber synthetic leather and preparation method thereof
CN119194720A (en) * 2024-10-28 2024-12-27 吴江市兴业纺织有限公司 Lightweight, breathable, sweat-absorbent sports fabric and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030104194A1 (en) * 2000-02-28 2003-06-05 Akira Honjo Process for producing porous object
CN102604115A (en) * 2012-02-22 2012-07-25 天津大学 Carboxymethyl chitosan quaternary ammonium salt/PAMAM(Polyamidoamine) core-shell nanoparticles and preparation method
CN103774455A (en) * 2012-10-15 2014-05-07 李翠平 Water-based polyurethane superfine fiber synthetic leather and preparation method thereof
CN118639444A (en) * 2024-06-26 2024-09-13 禾欣可乐丽超纤皮(嘉兴)有限公司 High-performance microfiber synthetic leather and preparation method thereof
CN119194720A (en) * 2024-10-28 2024-12-27 吴江市兴业纺织有限公司 Lightweight, breathable, sweat-absorbent sports fabric and preparation method thereof

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