CN113089334A - Soft and wear-resistant artificial leather and preparation method thereof - Google Patents
Soft and wear-resistant artificial leather and preparation method thereof Download PDFInfo
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- CN113089334A CN113089334A CN202110371711.XA CN202110371711A CN113089334A CN 113089334 A CN113089334 A CN 113089334A CN 202110371711 A CN202110371711 A CN 202110371711A CN 113089334 A CN113089334 A CN 113089334A
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
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- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
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- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
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- D06M11/68—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with phosphorus or compounds thereof, e.g. with chlorophosphonic acid or salts thereof
- D06M11/72—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with phosphorus or compounds thereof, e.g. with chlorophosphonic acid or salts thereof with metaphosphoric acids or their salts; with polyphosphoric acids or their salts; with perphosphoric acids or their salts
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/152—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen having a hydroxy group bound to a carbon atom of a six-membered aromatic ring
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- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/325—Amines
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- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
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- D06M2101/02—Natural fibres, other than mineral fibres
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- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention discloses soft and wear-resistant artificial leather and a preparation method thereof, and relates to the technical field of new materials. The base cloth of the artificial leather is subjected to fiber blending, flash explosion, fiber separation, crosslinking, weaving, repeated crosslinking and acid dipping treatment to prepare the base cloth of the artificial leather with excellent mechanical property, and then the base cloth of the artificial leather is immersed in epoxy resin mixed with nano silicon dioxide and subjected to curing, drying, corrosion prevention and oxidation prevention treatment to prepare the soft and wear-resistant artificial leather. The artificial leather prepared by the method simplifies the steps of the traditional leather making process while ensuring the mechanical property of the artificial leather, so that the leather making process is simpler, more convenient and quicker, and the quality of the prepared artificial leather is ensured.
Description
Technical Field
The invention relates to the technical field of new materials, in particular to soft and wear-resistant artificial leather and a preparation method thereof.
Background
Natural leather is a material with certain use performance formed by animal epidermis through a series of physical and chemical processing. The increase of the demand of the genuine leather is brought by the improvement of the social and economic levels, and the supply of the genuine leather can not meet the market demand due to the shortage of natural resources, so that the synthetic leather product can be produced as soon as possible. As an ideal genuine leather substitute, the synthetic leather not only has genuine leather appearance, aging resistance, physical properties, mechanical properties and the like, but also overcomes the defects of low genuine leather utilization rate, low modeling freedom degree and the like, and along with the progress of the technical level of the leather industry, the touch, visual fullness and air permeability of the synthetic leather also achieve the effect of genuine leather. The most developed countries in the automobile artificial leather industry are japan, and japan tanneries such as dongli corporation, korea, and asahi have been recently introduced with new products and have been applied in a large amount worldwide.
The artificial leather is soft and wear-resistant, the process efficiency of the artificial leather can be improved while the quality of the artificial leather is guaranteed, the yield is increased, and the artificial leather prepared by the method is soft and wear-resistant.
Disclosure of Invention
The invention aims to provide soft and wear-resistant artificial leather and a preparation method thereof, so as to solve the problems in the background technology.
The soft and wear-resistant artificial leather and the preparation method thereof are characterized in that the process flow for preparing the soft and wear-resistant artificial leather is as follows: fiber blending, flash explosion, fiber separation, crosslinking, weaving, repeated crosslinking, acid leaching, coating and finishing.
The preparation method of the soft and wear-resistant artificial leather is characterized by comprising the following specific steps of:
(1) blending: carrying out wet co-spinning on cotton fibers with the diameter of 15 microns and polyurethane fibers with the diameter of 20 microns according to the mass ratio of 1: 1-1: 2, and taking out;
(2) a fiber dividing step: washing the blend fiber by using ethanol, then soaking the blend fiber in distilled water for 1-2 hours, putting the soaked blend fiber into a flash explosion tank for steam flash explosion operation, collecting the flash exploded blend fiber after the operation is finished, washing the blend fiber for 10-20 min by using a fiber separating rinsing machine, and washing the blend fiber by using clear water;
(3) a crosslinking step: soaking the fiber-separated blended fiber into an ethanol solution, adding a cross-linking agent and maleimide, raising the temperature, stirring while carrying out a heat preservation reaction, taking out, washing with deionized water, and drying;
(4) weaving: weaving the blended fiber obtained in the step (3);
(5) and (3) carrying out secondary crosslinking: putting the knitted base cloth into an ethanol solution, adding a cross-linking agent and maleimide, raising the temperature, stirring while carrying out heat preservation reaction, taking out, washing by using deionized water, and drying;
(6) acid leaching step: immersing the base cloth obtained in the step (5) into an acid solution with the pH value of 5-6, stirring, adding a flame retardant, uniformly stirring, raising the temperature, cooling, taking out, washing with deionized water, and drying;
(7) coating: adding nano silicon dioxide into epoxy resin, dispersing the epoxy resin uniformly in a dispersion machine, immersing the base cloth obtained in the step (6) into the epoxy resin, standing for 1min, pulling up, and drying to obtain a semi-finished product;
(8) finishing: spraying an antioxidant on the semi-finished product obtained in the step (7), and embossing to obtain a finished product.
In the step of fiber separation, the water retention rate of the cotton fibers is set to be 50%, the flash explosion pressure is set to be 25.0N, the pressure maintaining time is 10-20 min, and the temperature is 100-120 ℃.
Preferably, in the crosslinking step, the temperature is raised to 60-70 ℃, the reaction is carried out for 1-2 hours under the condition of heat preservation, and the added crosslinking agent is one or more of trimethylolpropane, styrene and methacrylic acid.
And optimally, in the weaving step, the number ratio of the warp and the weft is controlled to be 1: 1.
In the step of re-crosslinking, raising the temperature to 90-100 ℃, and carrying out heat preservation reaction for 3-4 hours; the added cross-linking agent is one or more of trimethylolpropane, styrene and methacrylic acid.
Preferably, in the acid leaching step, the used acidic solution is one or more of a 5% hydrochloric acid solution, a 5% nitric acid solution and a 5% sulfurous acid solution; the added flame retardant is one or more of diammonium phosphate, ammonium polyphosphate and triphenyl phosphate, and the temperature is raised to 30-40 ℃ for 1 h.
In the coating step, the mass ratio of the added epoxy resin to the added nano silicon dioxide is 1: 0.02-1: 0.04.
Preferably, in the finishing step, the sprayed antioxidant is one or more of butylated hydroxyanisole, dibutyl hydroxy toluene and tert-butyl hydroquinone.
As optimization, the leather material prepared by the preparation method of the soft and wear-resistant artificial leather comprises the following raw materials in parts by weight: 50-70 parts of epoxy resin, 100-150 parts of cotton/polyurethane blended fiber and 5-10 parts of nano silicon dioxide.
Compared with the prior art, the invention has the following beneficial effects:
the soft wear-resistant artificial leather prepared by the application takes cotton/polyurethane blended fiber as base cloth, takes epoxy resin as a leather coating of the artificial leather, and is prepared by fiber separation, crosslinking, weaving, re-crosslinking, acid dipping and coating of the prepared product.
Firstly, the soft and wear-resistant artificial leather is prepared by using cotton/polyurethane blended fibers as base cloth, the diameter of the cotton fibers is smaller than that of the polyurethane fibers when the cotton fibers are prepared, then the cotton fibers and the polyurethane fibers are subjected to wet co-spinning, the cotton fibers are coated outside the polyurethane fibers, then the prepared cotton/polyurethane blended fibers are subjected to flash explosion treatment, the cotton fibers are subjected to violent fiber separation after flash explosion, the combination degree of a cloth base and epoxy resin is increased by a large amount of soft fiber separation, and the mechanical property of a finished product is ensured by the polyurethane at the moment.
Secondly, soaking the blended fiber after fiber splitting into an ethanol solution, then adding ethylenediamine and maleimide, so that the maleimide is subjected to intermolecular crosslinking by taking a hard segment of polyurethane as a crosslinking point under the action of a crosslinking agent, and a network structure is formed on the surface of the blended fiber, thereby improving the mechanical property of the blended fiber.
And then weaving the crosslinked blend fiber to obtain a blend base fabric, then carrying out repeated crosslinking operation on the blend base fabric, immersing the base fabric into an ethanol solution, adding ethylenediamine and maleimide, forming a three-dimensional network structure on the surface of the base fabric, and performing synergistic action with the grid structure on the surface of the blend fiber to ensure that the network structure on the base fabric is more compact, thereby further improving the chemical properties of the artificial leather.
Then, the base cloth after the re-crosslinking is immersed into an acid solution with the pH value of 5.7 for acid leaching treatment, then ammonium polyphosphate is added while acid leaching, a large number of free hydrogen ions in the acid solution can promote the crosslinking degree of the maleimide and the polyurethane, the crosslinking density and the crosslinking strength of a network structure on the cloth base are increased, and the added ammonium polyphosphate can be immersed into the fiber layer of the cloth base while the ammonium polyphosphate is flame-retardant, so that the flame retardance of the cloth base is increased.
Finally, dispersing the nano silicon dioxide in the epoxy resin, uniformly dispersing by using a high-speed stirrer, immersing the cloth base subjected to acid leaching into the epoxy resin for 1min, and then pulling up, wherein the surface tension of the epoxy resin on the cloth base is reduced by a compact network structure, so that a smooth and flat leather surface is formed; the nano-silica forms nano-protrusions in the epoxy resin, improves the wear resistance, simultaneously has a synergistic effect with the cotton fiber, increases the combination degree of the epoxy resin and the base cloth, and sprays the antioxidant after curing and drying to prepare the soft and wear-resistant artificial leather.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The soft and wear-resistant artificial leather and the preparation method thereof are characterized in that the process flow for preparing the soft and wear-resistant artificial leather is as follows: fiber blending, flash explosion, fiber separation, crosslinking, weaving, repeated crosslinking, acid leaching, coating and finishing.
The preparation method of the soft and wear-resistant artificial leather is characterized by comprising the following specific steps of:
(1) blending: carrying out wet co-spinning on cotton fibers with the diameter of 15 microns and polyurethane fibers with the diameter of 20 microns according to the mass ratio of 1: 1-1: 2, and taking out;
(2) a fiber dividing step: washing the blend fiber by using ethanol, then soaking the blend fiber in distilled water for 1-2 hours, putting the soaked blend fiber into a flash explosion tank for steam flash explosion operation, collecting the flash exploded blend fiber after the operation is finished, washing the blend fiber for 10-20 min by using a fiber separating rinsing machine, and washing the blend fiber by using clear water;
(3) a crosslinking step: soaking the fiber-separated blended fiber into an ethanol solution, adding a cross-linking agent and maleimide, raising the temperature, stirring while carrying out a heat preservation reaction, taking out, washing with deionized water, and drying;
(4) weaving: weaving the blended fiber obtained in the step (3);
(5) and (3) carrying out secondary crosslinking: putting the knitted base cloth into an ethanol solution, adding a cross-linking agent and maleimide, raising the temperature, stirring while carrying out heat preservation reaction, taking out, washing by using deionized water, and drying;
(6) acid leaching step: immersing the base cloth obtained in the step (5) into an acid solution with the pH value of 5-6, stirring, adding a flame retardant, uniformly stirring, raising the temperature, cooling, taking out, washing with deionized water, and drying;
(7) coating: adding nano silicon dioxide into epoxy resin, dispersing the epoxy resin uniformly in a dispersion machine, immersing the base cloth obtained in the step (6) into the epoxy resin, standing for 1min, pulling up, and drying to obtain a semi-finished product;
(8) finishing: spraying an antioxidant on the semi-finished product obtained in the step (7), and embossing to obtain a finished product.
In the step of fiber separation, the water retention rate of the cotton fibers is set to be 50%, the flash explosion pressure is set to be 25.0N, the pressure maintaining time is 10-20 min, and the temperature is 100-120 ℃.
Preferably, in the crosslinking step, the temperature is raised to 60-70 ℃, the reaction is carried out for 1-2 hours under the condition of heat preservation, and the added crosslinking agent is one or more of trimethylolpropane, styrene and methacrylic acid.
And optimally, in the weaving step, the number ratio of the warp and the weft is controlled to be 1: 1.
In the step of re-crosslinking, raising the temperature to 90-100 ℃, and carrying out heat preservation reaction for 3-4 hours; the added cross-linking agent is one or more of trimethylolpropane, styrene and methacrylic acid.
Preferably, in the acid leaching step, the used acidic solution is one or more of a 5% hydrochloric acid solution, a 5% nitric acid solution and a 5% sulfurous acid solution; the added flame retardant is one or more of diammonium phosphate, ammonium polyphosphate and triphenyl phosphate, the temperature is raised to 30-40 ℃, and the reaction time is 1 h.
In the coating step, the mass ratio of the added epoxy resin to the added nano silicon dioxide is 1: 0.02-1: 0.04.
Preferably, in the finishing step, the sprayed antioxidant is one or more of butylated hydroxyanisole, dibutyl hydroxy toluene and tert-butyl hydroquinone.
As optimization, the leather material prepared by the preparation method of the soft and wear-resistant artificial leather comprises the following raw materials in parts by weight: 50-70 parts of epoxy resin, 100-150 parts of cotton/polyurethane blended fiber and 5-10 parts of nano silicon dioxide.
Example 1: the first soft and wear-resistant artificial leather:
the process flow for preparing the soft and wear-resistant artificial leather comprises the following steps: fiber blending, flash explosion, fiber separation, crosslinking, weaving, repeated crosslinking, acid leaching, coating and finishing.
The preparation method of the soft and wear-resistant artificial leather is characterized by comprising the following specific steps of:
(1) blending: carrying out wet co-spinning on cotton fibers with the diameter of 15 microns and polyurethane fibers with the diameter of 20 microns according to the mass ratio of 1:1, and taking out;
(2) a fiber dividing step: washing the blend fiber by using ethanol, then soaking the blend fiber in distilled water for 1h, putting the soaked blend fiber into a flash explosion tank for steam flash explosion operation, collecting the flash exploded blend fiber after the operation is finished, washing the blend fiber for 10min by using a fiber separating rinsing machine, and washing the blend fiber by using clear water; setting the water retention rate of the cotton fiber to be 50%, the flash explosion pressure to be 25.0N, the pressure maintaining time to be 10min and the temperature to be 100 ℃;
(3) a crosslinking step: soaking the fiber-separated blended fiber into an ethanol solution, adding ethylenediamine and maleimide, raising the temperature to 60 ℃, stirring while preserving heat for reaction for 1h, taking out, washing with deionized water, and drying;
(4) weaving: weaving the blended fiber obtained in the step (3) and controlling the number ratio of warps and wefts to be 1: 1;
(5) and (3) carrying out secondary crosslinking: putting the woven base cloth into an ethanol solution, adding ethylenediamine and maleimide, raising the temperature to 90 ℃, stirring while preserving heat for reaction for 3 hours, taking out, washing with deionized water, and drying;
(6) acid leaching step: immersing the base cloth obtained in the step (5) into a hydrochloric acid solution with the pH of 5%, stirring, adding ammonium polyphosphate, uniformly stirring, raising the temperature to 30 ℃, reacting for 1h, cooling, taking out, washing with deionized water, and drying;
(7) coating: adding nano silicon dioxide into epoxy resin to enable the mass ratio of the epoxy resin to the nano silicon dioxide to be 1:0.02, after the epoxy resin and the nano silicon dioxide are uniformly dispersed in a dispersion machine, soaking the base cloth obtained in the step (6) into the epoxy resin, standing for 1min, pulling up, and drying to obtain a semi-finished product;
(8) finishing: and (4) spraying butyl hydroxy anisole on the semi-finished product obtained in the step (7), and embossing to obtain a finished product.
As optimization, the leather material prepared by the preparation method of the soft and wear-resistant artificial leather comprises the following raw materials in parts by weight: 50 parts of epoxy resin, 100 parts of cotton/polyurethane blended fiber and 5 parts of nano silicon dioxide.
Example 2: and (2) soft and wear-resistant artificial leather II:
the process flow for preparing the soft and wear-resistant artificial leather comprises the following steps: fiber blending, flash explosion, fiber separation, crosslinking, weaving, repeated crosslinking, acid leaching, coating and finishing.
The preparation method of the soft and wear-resistant artificial leather is characterized by comprising the following specific steps of:
(1) blending: carrying out wet co-spinning on cotton fibers with the diameter of 15 microns and polyurethane fibers with the diameter of 20 microns according to the mass ratio of 1:2, and taking out;
(2) a fiber dividing step: washing the blend fiber by using ethanol, then soaking the blend fiber in distilled water for 2 hours, putting the soaked blend fiber into a flash explosion tank for steam flash explosion operation, collecting the flash exploded blend fiber after the operation is finished, washing the blend fiber for 20 minutes by using a fiber separating rinsing machine, and washing the blend fiber by using clear water; setting the water retention rate of the cotton fiber to be 50%, the flash explosion pressure to be 25.0N, the pressure maintaining time to be 20min and the temperature to be 120 ℃;
(3) a crosslinking step: soaking the fiber-separated blended fiber into an ethanol solution, adding ethylenediamine and maleimide, raising the temperature to 70 ℃, stirring while preserving heat for reaction for 2 hours, taking out, washing with deionized water, and drying;
(4) weaving: weaving the blended fiber obtained in the step (3) and controlling the number ratio of warps and wefts to be 1: 1;
(5) and (3) carrying out secondary crosslinking: putting the woven base cloth into an ethanol solution, adding ethylenediamine and maleimide, raising the temperature to 100 ℃, stirring while keeping the temperature for reaction for 4 hours, taking out, washing with deionized water, and drying;
(6) acid leaching step: immersing the base cloth obtained in the step (5) into a 5% nitric acid solution with the pH value of 5, stirring, adding ammonium polyphosphate, uniformly stirring, raising the temperature to 40 ℃, reacting for 1h, cooling, taking out, washing with deionized water, and drying;
(7) coating: adding nano silicon dioxide into epoxy resin to enable the mass ratio of the epoxy resin to the nano silicon dioxide to be 1:0.04, after the epoxy resin and the nano silicon dioxide are uniformly dispersed in a dispersion machine, soaking the base cloth obtained in the step (6) into the epoxy resin, standing for 1min, pulling up, and drying to obtain a semi-finished product;
(8) finishing: and (4) spraying dibutyl hydroxy toluene on the semi-finished product obtained in the step (7), and embossing to obtain a finished product.
As optimization, the leather material prepared by the preparation method of the soft and wear-resistant artificial leather comprises the following raw materials in parts by weight: 60 parts of epoxy resin, 120 parts of cotton/polyurethane blended fiber and 7 parts of nano silicon dioxide.
Comparative example 1:
the formulation of comparative example 1 was the same as example 1. The artificial leather was produced by the same method as that of example 1 except that the step (2) of splitting was not performed, and the remaining steps were the same as those of example 1.
Comparative example 2:
comparative example 2 was formulated as in example 1. The artificial leather was produced by the same method as that of example 1 except that the re-crosslinking process of step (5) was not carried out, and the remaining steps were the same as those of example 1.
Comparative example 3:
the formulation of comparative example 3 was the same as example 1. The artificial leather was manufactured in the same manner as in example 1 except that the process of preparing epoxy resin containing nano-silica in step (7) was not performed, and the remaining steps were the same as in example 1.
Test example 1:
the artificial leathers prepared in example 1, example 2 and comparative example 2 were compared in tensile properties, and the tensile properties of the artificial leathers were measured on a material testing machine. The test conditions were: the clamp distance of the clamp head is 100mm, the testing speed is 500mm/min, the pre-tension is 0.09cN/dtex, and the test result is as follows:
| example 1 | Example 2 | Comparative example 2 | |
| Tensile Strength/cN/dtex | 12.6 | 12.9 | 8.8 |
As can be seen from the above table, the artificial leathers prepared from the components of example 1 and example 2 showed excellent tensile properties, and the artificial leathers prepared from the components of comparative example 2 showed much worse tensile properties than the components of examples 1 and 2, indicating that the artificial leathers prepared by the present application have improved production rate while ensuring the quality of the artificial leathers.
Test example 2:
the artificial leathers prepared in example 1, example 2 and comparative example 3 were subjected to abrasion resistance comparison, and the prepared artificial leathers were used as abrasives, rubbed 1000 times and 1500 times under a load of 5N, respectively, and then compared in tensile strength, and the results were as follows:
| example 1 | Example 2 | Comparative example 3 | |
| After 1000 times of rubbing | 12.3cN/dtex | 12.2cN/dtex | 7.4cN/dtex |
| After 1500 times of rubbing | 11.6cN/dtex | 11.2cN/dtex | 6.8cN/dtex |
As can be seen from the above table, the tensile strength of the artificial leather is excellent after the artificial leather is rubbed 1000 times and 1500 times respectively in the example 1 and the example 2, and the tensile strength of the artificial leather is much lower in the comparative example 3 than in the components of the example 1 and the example 2, which shows that the bonding degree of the epoxy resin and the base cloth is enhanced and the small protrusions are formed to increase the wear resistance of the artificial leather after the added nano silica is uniformly dispersed in the artificial leather.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the soft and wear-resistant artificial leather is characterized by comprising the following process flows of: fiber blending, flash explosion, fiber separation, crosslinking, weaving, repeated crosslinking, acid leaching, coating and finishing.
2. The preparation method of the soft and wear-resistant artificial leather is characterized by comprising the following specific steps of:
(1) blending: carrying out wet co-spinning on cotton fibers with the diameter of 15 microns and polyurethane fibers with the diameter of 20 microns according to the mass ratio of 1: 1-1: 2, and taking out;
(2) a fiber dividing step: washing the blend fiber by using ethanol, then soaking the blend fiber in distilled water for 1-2 hours, putting the soaked blend fiber into a flash explosion tank for steam flash explosion operation, collecting the flash exploded blend fiber after the operation is finished, washing the blend fiber for 10-20 min by using a fiber separating rinsing machine, and washing the blend fiber by using clear water;
(3) a crosslinking step: soaking the fiber-separated blended fiber into an ethanol solution, adding a cross-linking agent and maleimide, raising the temperature, stirring while carrying out a heat preservation reaction, taking out, washing with deionized water, and drying;
(4) weaving: weaving the blended fiber obtained in the step (3);
(5) and (3) carrying out secondary crosslinking: putting the knitted base cloth into an ethanol solution, adding a cross-linking agent and maleimide, raising the temperature, stirring while carrying out heat preservation reaction, taking out, washing by using deionized water, and drying;
(6) acid leaching step: immersing the base cloth obtained in the step (5) into an acid solution with the pH value of 5-6, stirring, adding a flame retardant, uniformly stirring, raising the temperature, cooling, taking out, washing with deionized water, and drying;
(7) coating: adding nano silicon dioxide into epoxy resin, dispersing the epoxy resin uniformly in a dispersion machine, immersing the base cloth obtained in the step (6) into the epoxy resin, standing for 1min, pulling up, and drying to obtain a semi-finished product;
(8) finishing: spraying an antioxidant on the semi-finished product obtained in the step (7), and embossing to obtain a finished product.
3. The method for preparing soft and wear-resistant artificial leather according to claim 2, wherein in the step of splitting, the water retention rate of the cotton fiber is set to be 50%, the flash explosion pressure is set to be 25.0N, the pressure maintaining time is set to be 10-20 min, and the temperature is set to be 100-120 ℃.
4. The preparation method of the soft and wear-resistant artificial leather as claimed in claim 3, wherein in the crosslinking step, the temperature is raised to 60-70 ℃, the heat preservation reaction is carried out for 1-2 hours, and the added crosslinking agent is one or more of trimethylolpropane, styrene and methacrylic acid.
5. The method for preparing soft and wear-resistant artificial leather as claimed in claim 4, wherein in the weaving step, the number ratio of the warp and weft is controlled to be 1: 1.
6. The preparation method of the soft and wear-resistant artificial leather as claimed in claim 5, wherein in the re-crosslinking step, the temperature is raised to 90-100 ℃, and the heat preservation reaction is carried out for 3-4 hours; the added cross-linking agent is one or more of trimethylolpropane, styrene and methacrylic acid.
7. The method for preparing soft and abrasion-resistant artificial leather according to claim 6, wherein in the acid leaching step, the acid solution is one or more of a 5% hydrochloric acid solution, a 5% nitric acid solution and a 5% sulfurous acid solution; the added flame retardant is one or more of diammonium phosphate, ammonium polyphosphate and triphenyl phosphate; the temperature is raised to 30-40 ℃ in a temperature raising mode, and the reaction time is 1 h.
8. The preparation method of the soft and wear-resistant artificial leather as claimed in claim 7, wherein in the coating step, the mass ratio of the added epoxy resin to the added nano silicon dioxide is 1: 0.02-1: 0.04.
9. The method for preparing soft and wear-resistant artificial leather according to claim 8, wherein in the finishing step, the sprayed antioxidant is one or more of butyl hydroxy anisole, dibutyl hydroxy toluene and tert-butyl hydroquinone.
10. The preparation method of the soft and wear-resistant artificial leather as claimed in claim 9, wherein the leather material prepared by the preparation method of the soft and wear-resistant artificial leather comprises the following raw materials in parts by weight: 50-70 parts of epoxy resin, 100-150 parts of cotton/polyurethane blended fiber and 5-10 parts of nano silicon dioxide.
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