CN115787192A - Preparation method of regenerated cow leather fiber synthetic leather - Google Patents
Preparation method of regenerated cow leather fiber synthetic leather Download PDFInfo
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- CN115787192A CN115787192A CN202211484716.4A CN202211484716A CN115787192A CN 115787192 A CN115787192 A CN 115787192A CN 202211484716 A CN202211484716 A CN 202211484716A CN 115787192 A CN115787192 A CN 115787192A
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention relates to the technical field of leather manufacturing, and provides a preparation method of regenerated cowhide fiber synthetic leather, which solves the problems of resource waste and environmental pollution easily caused by the conventional cowhide leftover material treatment mode. The method comprises the following steps: (1) preparing cow leather fiber: taking cowhide leftover materials as raw materials, and processing the raw materials to obtain cowhide fibers; (2) preparation of modified polyester fiber: synthesizing a functional auxiliary agent with a flame-retardant effect through a series of reactions such as esterification, substitution, ring opening and the like, then extruding and granulating the functional auxiliary agent and polyester chips to obtain functional master batches, and then carrying out melt spinning and stretching on the functional master batches and the polyester chips to obtain modified polyester fibers; (3) fiber mixed opening: mixing the cowhide fiber, the modified polyester fiber and the basalt fiber to form mixed fiber, and opening the mixed fiber by using an opener; (4) forming and laying; (5) hydroentangling and reinforcing; and (6) post-treatment.
Description
Technical Field
The invention relates to the technical field of leather manufacturing, in particular to a preparation method of regenerated cowhide fiber synthetic leather.
Background
Depending on the manner of manufacture, leather can be divided into: genuine leather, artificial leather and synthetic leather. The genuine leather is an original leather peeled from an animal, and is processed by a tannery to be made into a leather material having various characteristics, strength, texture, color and pattern, which is an essential material for modern genuine leather products. The artificial leather is also called as imitation leather, is a plastic product which looks and feels like real leather and can replace the imitation leather, is usually made by taking a fabric as a substrate and coating synthetic resin and various plastic additives, and mainly comprises two types of PVC artificial leather and PU synthetic leather. Synthetic leather is a plastic product which simulates the composition and structure of natural leather and can be used as a substitute material for the natural leather, and is usually prepared by taking impregnated non-woven fabrics as a net layer and a microporous polyurethane layer as a grain surface layer.
The leather has the advantages of plump hand feeling, easy cleaning, natural pores on the surface layer, excellent air permeability, and noble texture, and is the first choice for many high-grade leather products. The dermis is classified by animal category and can be classified into cow hide, sheep hide, pig hide, and other skins. Among them, cow hide is the most important raw hide material resource in the world leather industry, and accounts for about 2/3 of the total production of leather in the world. In the traditional leather making process, a large amount of cowhide leftover materials are generated. The leather scraps are generally piled up and collected and then sent to a garbage yard for incineration treatment, and the treatment mode not only pollutes the environment, but also is a great waste of resources. In view of the above problems, those skilled in the art have made extensive studies and have achieved certain results. For example, patent application No. CN202110823374.3 discloses a production process of cow leather, comprising the following steps: step one, preparing slurry; step two, forming by a papermaking method; step three, drying and cutting edges; and step four, buffing treatment, namely buffing the cow leather by using a buffing machine, and finally winding and packaging. The method comprises the steps of crushing leftover materials of the cowhide, preparing the leftover materials into slurry, then attaching a cowhide powder block to a mesh cloth through a papermaking process, carrying out high-pressure spunlace compounding, and finally carrying out buffing treatment to obtain the regenerated cowhide leather, so that the effects of reducing environmental pollution and comprehensively utilizing wastes are achieved.
Disclosure of Invention
Therefore, aiming at the above content, the invention provides a preparation method of regenerated cowhide fiber synthetic leather, which solves the problems that a large amount of cowhide leftover materials are generated in the traditional leather making process, a scientific and reasonable treatment method is not available, and resource waste and environmental pollution are easily caused.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a preparation method of regenerated cow leather fiber synthetic leather comprises the following steps:
(1) Preparing cow leather fiber:
taking cowhide leftover materials as raw materials, and processing to obtain cowhide fibers;
(2) Preparing modified polyester fiber:
adding 2-hydroxyethyl benzoate and phosphorus pentoxide into a reaction kettle according to a molar ratio of 2.4-2.8;
dissolving long-chain alkyl tertiary amine in tetrahydrofuran, then dropwise adding epoxy chloropropane, and carrying out nucleophilic substitution reaction to obtain an intermediate B, wherein the reaction temperature is 60-80 ℃, and the reaction time is 2-4 h;
adding the intermediate A and the intermediate B into a reaction kettle, and carrying out ring-opening reaction to obtain an intermediate C, wherein the reaction temperature is 30-50 ℃, and the reaction time is 30-60 min;
dissolving the intermediate C and 2-diphenyl isocyanate in a dimethylformamide solvent, heating to 55-65 ℃, and reacting for 3-8 h to obtain a functional auxiliary agent;
feeding the functional additive and the polyester chips into a double-screw extruder according to the mass ratio of 5-15;
performing melt spinning on the functional master batches and the polyester chips and stretching to obtain the modified polyester fiber, wherein the temperature of melt spun yarns is 265-295 ℃, the winding speed of the spun yarns is 1200-2000 m/min, and the stretching ratio is 2-4;
(3) Fiber mixing and opening:
mixing the cow leather fibers, the modified polyester fibers and the basalt fibers to form mixed fibers, and opening the mixed fibers by using an opener;
(4) Web formation and laying
Performing air laying on the opened mixed fiber raw material, and then layering each fiber net layer in a cross lapping mode;
(5) Hydroentangling reinforcement
Carrying out spunlace reinforcement on the fiber web obtained in the step to enable fibers in the fiber web to be displaced, interpenetrated, entangled and cohered to form a plurality of entanglement points, wherein the spunlace reinforcement process sequentially comprises a first front spunlace, a second back spunlace, a third front spunlace, a fourth front spunlace and a fifth back spunlace;
(6) Post-treatment
And drying and cutting the spunlaced and reinforced fiber web to obtain the regenerated cowhide fiber synthetic leather.
The further improvement is that: the structural formula of the long-chain alkyl tertiary amine is shown as the formula I:
wherein R is 1 Is C 7 ～C 15 Linear or branched alkylene of (2), R 2 、R 3 Each independently represents a methyl group or an ethyl group.
The further improvement is that: the molar ratio of the long-chain alkyl tertiary amine to the epoxy chloropropane is 1.5-2.5.
The further improvement is that: the mass ratio of the intermediate C to the 2-biphenyl isocyanate is 1.
The further improvement is that: and carrying out melt spinning on the functional master batch and the polyester chip according to the mass ratio of 20-40.
The further improvement is that: the mixed fiber comprises the following components in percentage by mass: 72-80% of cow leather fiber, 18-25% of modified polyester fiber and 1-5% of basalt fiber.
The further improvement is that: in the step (5), the pressure of the first front spunlace is 5-8 MPa, the pressure of the second back spunlace is 5-8 MPa, the pressure of the third front spunlace is 12-16 MPa, the pressure of the fourth front spunlace is 25-30 MPa, and the pressure of the fifth back spunlace is 28-32 MPa.
By adopting the technical scheme, the invention has the beneficial effects that:
according to the invention, the regenerated cowhide fiber synthetic leather prepared by processing and treating the cowhide leftover materials serving as one of the raw materials not only realizes the recycling and greening of leather wastes, but also improves the added value of cowhide fibers; and the product produced by the preparation process has excellent comprehensive performance, and has good flame retardance and antibacterial property. Specifically, the regenerated cowhide fiber synthetic leather is prepared by taking cowhide fiber, modified polyester fiber and basalt fiber as raw materials, uniformly mixing the cowhide fiber, the modified polyester fiber and the basalt fiber to form mixed fiber, and sequentially performing opening, web formation, lapping, spunlace reinforcement, drying and cutting. The polyester fiber has excellent mechanical properties, belongs to thermoplastic fiber, and can play a role in supporting a framework and improve the dimensional stability of the regenerated cowhide fiber synthetic leather when added into a formula system. However, polyester fibers have poor flame retardance, are molten and shrunk when being close to flame, are firstly heated and melted and then are combusted when being combusted or being heated, and drops are accompanied with flames in the combustion process, so that surrounding inflammable matters are easily ignited. Aiming at the problem, the invention firstly synthesizes the functional auxiliary agent with flame retardant effect, then the functional auxiliary agent and the polyester chip are extruded and granulated to obtain the functional master batch, and then the functional master batch and the polyester chip are melt spun to obtain the modified polyester fiber with excellent flame retardant effect. The traditional flame retardant mainly comprises a halogen flame retardant and a phosphorus flame retardant, wherein the halogen flame retardant can generate a large amount of smoke dust and toxic hydrogen halide gas during thermal cracking and combustion, and the phosphorus flame retardant has the problem of formaldehyde release during use. The functional assistant of the invention belongs to an environment-friendly flame retardant, does not contain halogen and can not release formaldehyde.
The benzoic acid-2-hydroxyethyl ester and phosphorus pentoxide undergo esterification reaction and hydrolysis reaction to obtain phosphate (namely an intermediate A), which is mainly a mixture of monoester phosphate and diester phosphate, the molecular structure of the phosphate mainly contains a benzoic acid ester functional group, and the phosphate has a structure similar to that of a polyester chip, so that the compatibility of a functional auxiliary agent and the polyester chip in the preparation process of the functional master batch can be improved, other auxiliary agents do not need to be added, and the flame retardant effect of the modified polyester fiber is further improved. The long-chain alkyl tertiary amine and epoxy chloropropane are subjected to nucleophilic substitution reaction to synthesize the quaternary ammonium salt containing the epoxy group (namely the intermediate B). The intermediate A and the intermediate B are subjected to ring-opening reaction to obtain an intermediate C containing hydroxyl functional groups, and finally, the intermediate C and 2-diphenyl isocyanate are subjected to nucleophilic addition reaction to introduce the biphenyl structure of the 2-diphenyl isocyanate into a molecular structure, and the biphenyl structure has good char forming performance and can effectively block heat exchange and smoke release, so that the functional auxiliary agent is endowed with an excellent flame retardant effect. The quaternary ammonium salt group chain segment in the functional additive can be adsorbed on the surface of microorganism, so that the permeability of the cell wall of the microorganism is changed, the membrane structure is destroyed, the activity of enzyme or protein is inhibited, the metabolism is hindered, and the killing effect is achieved, so that the modified polyester fiber obtained by processing has good flame retardance and antibacterial property.
Detailed Description
The following detailed description will be given with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.
Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.
Example 1
A preparation method of regenerated cow leather fiber synthetic leather comprises the following steps:
(1) Preparing cow leather fiber:
the method is characterized in that cowhide leftover materials are used as raw materials, and cowhide fibers are obtained through treatment, the process is a known technology, and a preparation method disclosed in the patent number CN201110146644.8 can be specifically referred;
(2) Preparing modified polyester fibers:
adding 2-hydroxyethyl benzoate and phosphorus pentoxide into a reaction kettle according to a molar ratio of 2.4, heating to 64 ℃, keeping the temperature for 6h, then adding deionized water with the mass of 8% of the phosphorus pentoxide into the reaction kettle, heating to 80 ℃, and keeping the temperature for 3h to obtain an intermediate A, wherein the 2-hydroxyethyl benzoate is a product obtained by esterification reaction of benzoic acid and ethylene glycol, and the preparation method is known, and the general knowledge can be referred to the article published by Wang Nay (esterification reaction of Wang Nax. Ethylene glycol and benzoic acid [ J ]. Bao Chicken academy of sciences (Nature edition), 2000,20 (1): 36-38);
dissolving N, N-dimethyl N-octylamine in tetrahydrofuran, then dropwise adding epoxy chloropropane, wherein the molar ratio of the N, N-dimethyl N-octylamine to the epoxy chloropropane is 1.5, performing nucleophilic substitution reaction to obtain an intermediate B, wherein the reaction temperature is 60 ℃, and the reaction time is 4h;
adding the intermediate A and the intermediate B into a reaction kettle, and carrying out ring-opening reaction to obtain an intermediate C, wherein the reaction temperature is 30 ℃, and the reaction time is 60min;
dissolving an intermediate C and 2-biphenyl isocyanate in a dimethylformamide solvent, wherein the mass ratio of the intermediate C to the 2-biphenyl isocyanate is 1;
feeding the functional additive and the polyester chips into a double-screw extruder according to the mass ratio of 5;
carrying out melt spinning on the functional master batches and the polyester chips according to the mass ratio of 40;
(3) Mixing and opening fibers:
mixing cow leather fibers, modified polyester fibers and basalt fibers to form mixed fibers, and opening the mixed fibers by using an opener, wherein the mixed fibers respectively comprise the following components in percentage by mass: 72% of cow leather fiber, 23% of modified polyester fiber and 5% of basalt fiber;
(4) Web formation and laying
Performing air laying on the opened mixed fiber raw material, and then layering each fiber net layer in a cross lapping mode;
(5) Hydroentangling reinforcement
Carrying out spunlace reinforcement on the fiber web obtained in the step so that fibers in the fiber web are displaced, interpenetrated, entangled and cohered to form a plurality of entanglement points, wherein the spunlace reinforcement process sequentially comprises a first front spunlace, a second back spunlace, a third front spunlace, a fourth front spunlace and a fifth back spunlace, wherein the pressure of the first front spunlace is 5MPa, the pressure of the second back spunlace is 5MPa, the pressure of the third front spunlace is 12MPa, the pressure of the fourth front spunlace is 25MPa, and the pressure of the fifth back spunlace is 28MPa;
(6) Post-treatment
And drying and cutting the spunlaced and reinforced fiber web to obtain the regenerated cowhide fiber synthetic leather.
The antibacterial performance test of the regenerated cowhide fiber synthetic leather prepared in the embodiment shows that the test strains are staphylococcus aureus (ATCC 6538) and escherichia coli (ATCC 25922): the bacteriostasis rate to staphylococcus aureus is 98.9 percent, and the bacteriostasis rate to colibacillus is 98.6 percent.
The flame retardant property test of the regenerated cowhide fiber synthetic leather prepared by the embodiment is carried out according to the QB/T2729-2005 method, and the test result shows that the burning speed of the sample is 14.4mm/min.
Example 2
A preparation method of regenerated cow leather fiber synthetic leather comprises the following steps:
(1) Preparing cow leather fiber:
taking cowhide leftover materials as raw materials, and processing the raw materials to obtain cowhide fibers;
(2) Preparing modified polyester fibers:
adding 2-hydroxyethyl benzoate and phosphorus pentoxide into a reaction kettle according to a molar ratio of 2.6;
dissolving dodecyl dimethyl tertiary amine in tetrahydrofuran, then dropwise adding epoxy chloropropane, wherein the molar ratio of the dodecyl dimethyl tertiary amine to the epoxy chloropropane is 1:2, performing nucleophilic substitution reaction to obtain an intermediate B, wherein the reaction temperature is 70 ℃, and the reaction time is 3h;
adding the intermediate A and the intermediate B into a reaction kettle, and carrying out ring opening reaction to obtain an intermediate C, wherein the reaction temperature is 40 ℃, and the reaction time is 50min;
dissolving an intermediate C and 2-biphenyl isocyanate in a dimethylformamide solvent, wherein the mass ratio of the intermediate C to the 2-biphenyl isocyanate is 1;
feeding the functional additive and the polyester chips into a double-screw extruder according to the mass ratio of 10;
carrying out melt spinning on the functional master batch and the polyester chips according to the mass ratio of 30;
(3) Fiber mixing and opening:
mixing cowhide fiber, modified polyester fiber and basalt fiber to form mixed fiber, and opening the mixed fiber by using an opener, wherein the mixed fiber comprises the following components in parts by mass: 76% of cow leather fiber, 21% of modified polyester fiber and 3% of basalt fiber;
(4) Web formation and laying
Performing air laying on the opened mixed fiber raw material, and then layering each fiber net layer in a cross lapping mode;
(5) Hydroentangling reinforcement
Carrying out spunlace reinforcement on the fiber web obtained in the step so that fibers in the fiber web are displaced, interpenetrated, entangled and cohered to form a plurality of entanglement points, wherein the spunlace reinforcement process sequentially comprises a first front spunlace, a second back spunlace, a third front spunlace, a fourth front spunlace and a fifth back spunlace, wherein the pressure of the first front spunlace is 6MPa, the pressure of the second back spunlace is 6MPa, the pressure of the third front spunlace is 14MPa, the pressure of the fourth front spunlace is 28MPa, and the pressure of the fifth back spunlace is 30MPa;
(6) Post-treatment
And drying and cutting the spunlaced and reinforced fiber web to obtain the regenerated cowhide fiber synthetic leather.
The antibacterial performance test of the regenerated cowhide fiber synthetic leather prepared by the embodiment shows that: the bacteriostasis rate to staphylococcus aureus is 99.3 percent, and the bacteriostasis rate to escherichia coli is 99.4 percent.
The flame retardant property test is carried out on the regenerated cowhide fiber synthetic leather prepared by the embodiment, and the test result is as follows: the burning rate of the sample was 13.2mm/min.
Example 3
A preparation method of regenerated cow leather fiber synthetic leather comprises the following steps:
(1) Preparing cow leather fiber:
taking cowhide leftover materials as raw materials, and processing to obtain cowhide fibers;
(2) Preparing modified polyester fiber:
adding 2-hydroxyethyl benzoate and phosphorus pentoxide into a reaction kettle according to a molar ratio of 2.8;
dissolving hexadecyl dimethyl tertiary amine in tetrahydrofuran, then dropwise adding epoxy chloropropane, wherein the molar ratio of the hexadecyl dimethyl tertiary amine to the epoxy chloropropane is 1:2.5, performing nucleophilic substitution reaction to obtain an intermediate B, wherein the reaction temperature is 80 ℃, and the reaction time is 2h;
adding the intermediate A and the intermediate B into a reaction kettle, and carrying out ring opening reaction to obtain an intermediate C, wherein the reaction temperature is 50 ℃ and the reaction time is 30min;
dissolving an intermediate C and 2-biphenyl isocyanate in a dimethylformamide solvent, wherein the mass ratio of the intermediate C to the 2-biphenyl isocyanate is 1;
feeding the functional additive and the polyester chips into a double-screw extruder according to the mass ratio of 15;
carrying out melt spinning on the functional master batches and the polyester chips according to the mass ratio of 20;
(3) Mixing and opening fibers:
mixing cowhide fiber, modified polyester fiber and basalt fiber to form mixed fiber, and opening the mixed fiber by using an opener, wherein the mixed fiber comprises the following components in parts by mass: 80% of cow leather fiber, 19% of modified polyester fiber and 1% of basalt fiber;
(4) Web formation and laying
Performing air laying on the opened mixed fiber raw material, and then layering each fiber net layer in a cross lapping mode;
(5) Hydroentangling reinforcement
And carrying out spunlace reinforcement on the fiber web obtained in the step to enable the fibers in the fiber web to be displaced, interpenetrated, entangled and cohered to form a plurality of entanglement points, wherein the spunlace reinforcement process sequentially comprises a first front spunlace, a second back spunlace, a third front spunlace, a fourth front spunlace and a fifth back spunlace, wherein the pressure of the first front spunlace is 8MPa, the pressure of the second back spunlace is 8MPa, the pressure of the third front spunlace is 16MPa, the pressure of the fourth front spunlace is 30MPa, and the pressure of the fifth back spunlace is 32MPa.
(6) Post-treatment
And drying and cutting the spunlaced and reinforced fiber web to obtain the regenerated cowhide fiber synthetic leather.
The antibacterial performance test is carried out on the regenerated cowhide fiber synthetic leather prepared by the embodiment, and the test result shows that: the bacteriostasis rate to staphylococcus aureus is 99.6 percent, and the bacteriostasis rate to escherichia coli is 99.2 percent.
The flame retardant performance of the regenerated cowhide fiber synthetic leather prepared in the embodiment is tested, and the test result is as follows: the burning rate of the sample was 13.6mm/min.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (7)
1. A preparation method of regenerated cow leather fiber synthetic leather is characterized by comprising the following steps: the method comprises the following steps:
(1) Preparing cow leather fiber:
taking cowhide leftover materials as raw materials, and processing the raw materials to obtain cowhide fibers;
(2) Preparing modified polyester fibers:
adding 2-hydroxyethyl benzoate and phosphorus pentoxide into a reaction kettle according to a molar ratio of 2.4-2.8, heating to 64-72 ℃, preserving heat for 4-6 h, then adding deionized water into the reaction kettle, heating to 80-90 ℃, preserving heat for 1-3 h, and obtaining an intermediate A;
dissolving long-chain alkyl tertiary amine in tetrahydrofuran, then dropwise adding epoxy chloropropane, and carrying out nucleophilic substitution reaction to obtain an intermediate B, wherein the reaction temperature is 60-80 ℃, and the reaction time is 2-4 h;
adding the intermediate A and the intermediate B into a reaction kettle, and carrying out ring-opening reaction to obtain an intermediate C, wherein the reaction temperature is 30-50 ℃, and the reaction time is 30-60 min;
dissolving the intermediate C and 2-diphenyl isocyanate in a dimethylformamide solvent, heating to 55-65 ℃, and reacting for 3-8 h to obtain a functional auxiliary agent;
feeding the functional additive and the polyester chips into a double-screw extruder according to the mass ratio of 5-15;
carrying out melt spinning on the functional master batch and the polyester chips and stretching to obtain modified polyester fiber;
(3) Fiber mixing and opening:
mixing the cowhide fiber, the modified polyester fiber and the basalt fiber to form mixed fiber, and opening the mixed fiber by using an opener;
(4) Web forming and laying:
performing air laying on the opened mixed fiber raw material, and then layering each fiber net layer in a cross lapping mode;
(5) And (3) spunlacing reinforcement:
carrying out spunlace reinforcement on the fiber web obtained in the step to enable fibers in the fiber web to be displaced, interpenetrated, entangled and cohered to form a plurality of entanglement points, wherein the spunlace reinforcement process sequentially comprises a first front spunlace, a second back spunlace, a third front spunlace, a fourth front spunlace and a fifth back spunlace;
(6) And (3) post-treatment:
and drying and cutting the spunlaced and reinforced fiber web to obtain the regenerated cowhide fiber synthetic leather.
2. The method for preparing the regenerated cowhide fiber synthetic leather according to claim 1, wherein the method comprises the following steps: the structural formula of the long-chain alkyl tertiary amine is shown as the formula I:
wherein R is 1 Is C 7 ～C 15 Linear or branched alkylene of R 2 、R 3 Each independently represents a methyl group or an ethyl group.
3. The method for preparing the regenerated cowhide fiber synthetic leather according to claim 1, wherein the method comprises the following steps: the molar ratio of the long-chain alkyl tertiary amine to the epichlorohydrin is 1.5-2.5.
4. The preparation method of the regenerated cowhide fiber synthetic leather according to claim 1, characterized in that: the mass ratio of the intermediate C to the 2-isocyanic acid biphenyl ester is 1.6-0.9.
5. The preparation method of the regenerated cowhide fiber synthetic leather according to claim 1, characterized in that: and carrying out melt spinning on the functional master batch and the polyester chip according to the mass ratio of 20-40.
6. The method for preparing the regenerated cowhide fiber synthetic leather according to claim 1, wherein the method comprises the following steps: the mixed fiber comprises the following components in percentage by mass: 72-80% of cow leather fiber, 18-25% of modified polyester fiber and 1-5% of basalt fiber.
7. The preparation method of the regenerated cowhide fiber synthetic leather according to claim 1, characterized in that: in the step (5), the pressure of the first front spunlace is 5-8 MPa, the pressure of the second back spunlace is 5-8 MPa, the pressure of the third front spunlace is 12-16 MPa, the pressure of the fourth front spunlace is 25-30 MPa, and the pressure of the fifth back spunlace is 28-32 MPa.
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| JPH11117181A (en) * | 1997-10-09 | 1999-04-27 | Hoshin Jitsugyo Kofun Yugenkoshi | Production of synthetic leather |
| JP2009209489A (en) * | 2008-03-05 | 2009-09-17 | Seiren Co Ltd | Flame-retardant synthetic leather |
| CN105755845A (en) * | 2016-04-29 | 2016-07-13 | 石家庄百分百塑材制造有限公司 | Dermal fiber reclaimed leather for floor leather base layer and manufacturing method thereof |
| CN108315874A (en) * | 2018-04-09 | 2018-07-24 | 浙江思凯域新材料有限公司 | Recycled Kraft fiber synthetic leather and preparation method thereof |
| CN114561746A (en) * | 2022-01-07 | 2022-05-31 | 成都众信塑胶有限责任公司 | Method for manufacturing animal fiber composite full-layer leather |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11117181A (en) * | 1997-10-09 | 1999-04-27 | Hoshin Jitsugyo Kofun Yugenkoshi | Production of synthetic leather |
| JP2009209489A (en) * | 2008-03-05 | 2009-09-17 | Seiren Co Ltd | Flame-retardant synthetic leather |
| CN105755845A (en) * | 2016-04-29 | 2016-07-13 | 石家庄百分百塑材制造有限公司 | Dermal fiber reclaimed leather for floor leather base layer and manufacturing method thereof |
| CN108315874A (en) * | 2018-04-09 | 2018-07-24 | 浙江思凯域新材料有限公司 | Recycled Kraft fiber synthetic leather and preparation method thereof |
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