CN111455681B - Preparation method of degradable artificial leather based on agricultural and forestry waste - Google Patents
Preparation method of degradable artificial leather based on agricultural and forestry waste Download PDFInfo
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- CN111455681B CN111455681B CN202010259954.XA CN202010259954A CN111455681B CN 111455681 B CN111455681 B CN 111455681B CN 202010259954 A CN202010259954 A CN 202010259954A CN 111455681 B CN111455681 B CN 111455681B
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 65
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000010985 leather Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 238000012805 post-processing Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 22
- 229920006025 bioresin Polymers 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 238000004537 pulping Methods 0.000 claims description 13
- 239000002023 wood Substances 0.000 claims description 12
- 239000010902 straw Substances 0.000 claims description 11
- 238000010411 cooking Methods 0.000 claims description 9
- 238000004049 embossing Methods 0.000 claims description 9
- 239000012190 activator Substances 0.000 claims description 8
- 238000009960 carding Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002562 thickening agent Substances 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 150000002191 fatty alcohols Chemical class 0.000 claims description 6
- 239000011268 mixed slurry Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- -1 pentaerythritol fatty acid ester Chemical class 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
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- 238000004043 dyeing Methods 0.000 claims description 3
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- 238000003756 stirring Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 235000012424 soybean oil Nutrition 0.000 description 2
- 239000003549 soybean oil Substances 0.000 description 2
- QSJXEFYPDANLFS-UHFFFAOYSA-N Diacetyl Chemical group CC(=O)C(C)=O QSJXEFYPDANLFS-UHFFFAOYSA-N 0.000 description 1
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- 238000012512 characterization method Methods 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
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- 125000005456 glyceride group Chemical group 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
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- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—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 by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/042—Acrylic polymers
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
- D01C1/00—Treatment of vegetable material
- D01C1/02—Treatment of vegetable material by chemical methods to obtain bast fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- 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
- D06N3/0011—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 non-woven fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- 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
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2201/00—Chemical constitution of the fibres, threads or yarns
- D06N2201/04—Vegetal fibres
- D06N2201/042—Cellulose fibres, e.g. cotton
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- D06N2201/00—Chemical constitution of the fibres, threads or yarns
- D06N2201/04—Vegetal fibres
- D06N2201/042—Cellulose fibres, e.g. cotton
- D06N2201/047—Wood fibres
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- D06N2209/00—Properties of the materials
- D06N2209/10—Properties of the materials having mechanical properties
- D06N2209/103—Resistant to mechanical forces, e.g. shock, impact, puncture, flexion, shear, compression, tear
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- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1607—Degradability
- D06N2209/1614—Biodegradable
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- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
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- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
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Abstract
The invention provides a preparation method of degradable artificial leather based on agricultural and forestry waste, which specifically comprises the following steps: the method comprises the steps of manufacturing fiber raw materials, manufacturing synthetic leather base materials, manufacturing synthetic leather, post-processing the synthetic leather and the like. The manufactured artificial leather has the advantages of high strength and tearing resistance, has almost the same performance as the leather or the artificial leather on the market, has the biodegradation rate of more than 95 percent, can be reused as a raw material after being recycled, has the advantages of degradability, recyclability and the like, and solves the environmental protection problems such as environmental protection, degradation, regeneration and the like which cannot be achieved by the artificial leather, and the problems of low recovery rate and non-degradability of the traditional leather or the artificial leather.
Description
Technical Field
The invention relates to a preparation method of artificial leather, in particular to a preparation method of degradable artificial leather based on agricultural and forestry waste.
Background
In the early days, materials for manufacturing leather are all taken from animal skins, and animal leather products have good physical properties such as elasticity, wear resistance and air permeability, but the animal skins are scarce in resources, difficult to produce on a large scale and expensive, and cannot be generally owned by general consumer masses. In order to alleviate the situation, the artificial leather serving as a substitute material is operated, the production cost of the artificial leather is low, the product is elegant and attractive, and the artificial leather has higher simulation degree, so that the artificial leather is popular.
However, with the improvement of the living standard of people, the attention to the safety and environmental protection of the product is greatly improved. The synthetic polymer materials are used as raw materials for the artificial leather produced in the current market, so that a large amount of waste is produced in the production process, toxic gas and waste water are discharged, and the environment is seriously polluted. Meanwhile, the generated waste is difficult to degrade in the natural environment for a long time, which is a potential hidden trouble for the environment. With the recent increasing of propaganda force to animals and environment protection in China and the forbidding of production and management of animal products, people are called for to reduce the use of environmentally harmful products.
The publication number is: chinese patent application CN109054222a discloses a clean ecological degradable PVC decorative imitation leather made from ecological PVC slurry; the ecological slurry is prepared from the following components: PVC resin powder, vinyl chloride-vinyl acetate resin, diacetyl epoxy soybean oil glyceride, polycaprolactone-based polyurethane elastomer, foaming agent, epoxy soybean oil, organic modified clay, lubricant, silicone master batch and stabilizer. The artificial leather prepared by the treatment process has the advantages of no toxicity, environmental protection, low temperature resistance, wear resistance, scratch resistance, good softness, easy maintenance, partial biodegradation, texture, full color, moisture absorption, ventilation, smoothness, comfort, antibacterial, deodorization and good migration resistance. However, the artificial leather is only partially degraded, and the pure chemical synthesis method is adopted to produce the artificial leather, and the degradable base material is not used as a support, so that the tear resistance is poor, and the high biodegradation rate cannot be achieved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of degradable artificial leather based on agricultural and forestry waste, which fully utilizes the agricultural and forestry waste and natural biological base materials, and obtains the artificial leather with high strength and high degradation rate by coating degradable resin, and harmful substances are not generated during degradation, so that the artificial leather is environment-friendly, healthy and recyclable.
In order to achieve the technical scheme, the invention provides a preparation method of degradable artificial leather based on agricultural and forestry waste, which comprises the following steps:
s1, manufacturing a fiber raw material: the agricultural and forestry waste is prepared by mixing crop straws and wood, steaming by a chemical method, adding a steaming auxiliary agent, pulping by a pulping machine, and drying to obtain natural-color slurry;
s2, manufacturing a synthetic leather base material: the prepared natural color sizing agent is subjected to coarse opening, fine opening, carding, lapping and molding, and is sent to a hydroentangling machine for hydroentangling reinforcement and shaping to prepare the synthetic leather base material;
s3, manufacturing synthetic leather: soaking a synthetic leather substrate in a bio-based resin impregnating solution uniformly by adopting an impregnating method, and then taking out the substrate for drying to obtain leather raw leather;
s4, post-processing treatment of the synthetic leather: and dyeing, embossing and kneading the prepared raw leather to obtain a finished product.
Preferably, the step S1 specifically includes the following steps:
s11, selecting crop straws and wood which are agricultural and forestry waste, wherein the crop straws are 60-80 parts by weight and the wood is 20-40 parts by weight, uniformly mixing, placing the mixture in a cooking pot, and adding sodium dithionite solution with the mass concentration of 1% as a cooking auxiliary agent for cooking;
s12, screening the steamed mixed slurry by a screening machine, and conveying the screened mixed slurry into a pulping machine for pulping treatment, wherein the pulping degree of the slurry is controlled to be 30+/-2 DEG SR;
s13, placing the pulped slurry in an oven for drying to obtain natural-color slurry for standby.
Preferably, the step S2 specifically includes the following steps:
s21, placing the natural-color slurry in a coarse opener for coarse opening, and then placing the natural-color slurry in a fine opener for fine opening to uniformly spread the natural-color slurry;
s22, placing the uniformly spread unbleached pulp into a carding machine for carding, and then using a lapping machine for lapping and forming;
s23, conveying the base material after net laying molding into a hydro-entangling machine for hydro-entangling reinforcement, and then drying and shaping to obtain the synthetic leather base material, wherein the ration of the base material is controlled to be 150+/-5 g/m 2 。
Preferably, the bio-based resin impregnation liquid in step S3 is prepared by the following method: the modified acrylic resin is prepared by mixing, by mass, 80-100 parts of acrylic resin, 2-4 parts of thickener polyethylene glycol, 1-3 parts of activator fatty alcohol polyoxyethylene ether and 1-2 parts of softener pentaerythritol fatty acid ester.
Preferably, in the step S3, hot air drying is adopted, the drying temperature is 135-165 ℃, and the final coating weight after the bio-based resin impregnating solution is dried is controlled to be 50+/-5 g/m 2 。
Preferably, the embossing in the step S5 is one of flat embossing and roller embossing.
The preparation method of degradable artificial leather based on agricultural and forestry waste provided by the invention has the beneficial effects that:
the invention provides a preparation method of degradable artificial leather based on agricultural and forestry waste,
1. the raw materials used for the artificial leather manufactured by the invention are natural biological base materials: agricultural and forestry waste, including crop straw and wood, has rich output and can be recycled infinitely; the bio-based resin coated in the leather preparation process also belongs to the degradable category, and can be automatically degraded in natural environment.
2. The artificial leather manufactured by the method has the advantages of high strength and tearing resistance, has almost the same performance as leather or artificial leather on the market, can be reused as raw materials after being recycled, has the advantages of degradability, recycling and the like, and solves the environmental protection problems of environmental protection, degradation, regeneration and the like which cannot be achieved by the artificial leather, and the problems of low recovery rate and non-degradability of the traditional leather or artificial leather.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present invention.
The detection and characterization method of the artificial leather prepared in the specific embodiment of the invention is as follows:
the testing method comprises the following steps:
quantitative determination of: thickness measurement with reference to GB/T-451.2-2005 standard
Thickness measurement was performed with reference to GB-4689.4-84 standard.
Tensile strength: the tensile strength was determined with reference to QB/T-3812.5-1999 standard.
Tearing force: the tear force was determined with reference to QB/T3812.6-1999 standard.
Biodegradation rate: the biodegradation rate was expressed according to the GB/T19277 standard by measuring the ratio of the final carbon dioxide release to its theoretical maximum release.
Specific examples of the method of the present invention are given below.
Example 1
The preparation method of the degradable artificial leather based on the agricultural and forestry waste specifically comprises the following steps:
s1, manufacturing a fiber raw material:
s11, selecting crop straws and wood which are agricultural and forestry waste, wherein the crop straws and the wood are 70 parts by weight, and the wood is 30 parts by weight, uniformly mixing, then placing the mixture into a cooking pot, and adding sodium dithionite solution with the mass concentration of 1% as a cooking auxiliary agent for cooking;
s12, screening the steamed mixed slurry by a screening machine, and conveying the screened mixed slurry into a pulping machine for pulping treatment, wherein the pulping degree of the slurry is controlled to be 30+/-2 DEG SR;
s13, placing the pulped slurry in an oven for drying to obtain natural-color slurry for standby;
s2, manufacturing a synthetic leather base material:
s21, placing the natural-color slurry in a coarse opener for coarse opening, and then placing the natural-color slurry in a fine opener for fine opening to uniformly spread the natural-color slurry;
s22, placing the uniformly spread unbleached pulp into a carding machine for carding, and then using a lapping machine for lapping and forming;
s23, conveying the base material after net laying molding into a hydro-entangling machine for hydro-entangling reinforcement, and then drying and shaping to obtain the synthetic leather base material, wherein the ration of the base material is controlled to be 150+/-5 g/m 2 ；
S3, manufacturing synthetic leather: the method comprises the steps of adopting an impregnation method, and placing a synthetic leather substrate into a bio-based resin impregnation liquid for uniform impregnation, wherein the bio-based resin impregnation liquid is prepared by the following steps: 90 parts of acrylic resin3 parts of thickener polyethylene glycol, 2 parts of activator fatty alcohol polyoxyethylene ether, 2 parts of softener pentaerythritol fatty acid ester, mixing and stirring uniformly to obtain the product, taking out a base material, drying the base material, adopting hot air for drying at 155+/-5 ℃, and controlling the final coating weight of the biobased resin impregnating solution after drying to 50+/-5 g/m 2 Obtaining leather raw skin;
s4, post-processing treatment of the synthetic leather: and (5) dyeing the prepared raw leather, embossing the raw leather by a flat plate, and rubbing the raw leather to obtain a finished product.
Example 2
The preparation method of degradable artificial leather based on agricultural and forestry waste basically has the same steps as those of the embodiment 1, except that the bio-based resin impregnating solution in the step S2 is prepared by the following method: the weight portions of the components are 80 portions of acrylic resin, 2 portions of thickener polyethylene glycol, 1 portion of activator fatty alcohol polyoxyethylene ether, 1 portion of softener pentaerythritol fatty acid ester, and the rest technical characteristics are the same as those of the example 1.
Example 3
The preparation method of degradable artificial leather based on agricultural and forestry waste basically has the same steps as those of the embodiment 1, except that the bio-based resin impregnating solution in the step S2 is prepared by the following method: 100 parts of acrylic resin, 4 parts of thickener polyethylene glycol, 3 parts of activator fatty alcohol polyoxyethylene ether, 2 parts of softener pentaerythritol fatty acid ester and the balance of technical characteristics are the same as those of the example 1.
Example 4
The preparation method of degradable artificial leather based on agricultural and forestry waste basically has the same steps as those of the embodiment 1, except that the bio-based resin impregnating solution in the step S2 is prepared by the following method: 90 parts of acrylic resin, 4 parts of thickener polyethylene glycol, 2 parts of activator fatty alcohol polyoxyethylene ether, 1 part of softener pentaerythritol fatty acid ester and the balance of technical characteristics are the same as those of the example 1.
Example 5
The preparation method of the degradable artificial leather based on the agricultural and forestry waste basically has the same steps as those of the embodiment 1, and is characterized in that 60 parts of crop straws and 40 parts of wood are mixed uniformly in the step S1 and then placed in a digester, and the rest technical characteristics are the same as those of the embodiment 1.
Example 6
The preparation method of the degradable artificial leather based on the agricultural and forestry waste basically has the same steps as those of the embodiment 1, and is characterized in that 80 parts of crop straws and 20 parts of wood are mixed uniformly in the step S1 and then placed in a digester, and the rest technical characteristics are the same as those of the embodiment 1.
Comparative example 1
The thickness, tensile strength, tear resistance and biodegradation rate of the commercially available artificial leather of Kasen brand (currently commercially available artificial leather with better quality) from the company of Kasen industry, zhejiang, were measured.
Comparative example 2
The preparation method of degradable artificial leather based on agricultural and forestry waste basically has the same steps as those of the embodiment 1, except that the bio-based resin impregnating solution in the step S2 is prepared by the following method: 90 parts of acrylic resin, and stirring after adding water, and no thickener, activator and softener are added, and the other technical characteristics are the same as those of the example 1.
The thickness, tensile strength, tear resistance and biodegradation rate of examples 1 to 6 and comparative example 1 and comparative example 2 were measured, and specific data are shown in table 1:
TABLE 1
As can be seen from the data in Table 1, the comparison between examples 1-6 and comparative example 1 shows that the artificial leather prepared by the method provided by the invention is prepared by adopting the degradable bio-based raw material as the base material and the degradable bio-based resin as the auxiliary material, and has basically the same strength as the existing market, thereby not only meeting the requirements of the tensile strength and the tear resistance of the artificial leather, but also solving the environmental protection problems of the artificial leather such as environmental protection, degradation, regeneration and the like which cannot be achieved by the artificial leather, wherein the biodegradation rate of the prepared artificial leather exceeds more than 95%.
As can be seen from the comparison of the data in example 1 and comparative example 2, the formulation of the bio-based resin impregnating solution has a great influence on the tensile and tear strength of the final product, and if the impregnating solution prepared without adding additives such as a thickener, an activator, a softener and the like is impregnated, the tensile and tear strength of the final product is greatly reduced.
The foregoing is a preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, so that the equivalents and modifications can be made without departing from the spirit of the disclosure.
Claims (2)
1. The preparation method of the degradable artificial leather based on the agricultural and forestry waste is characterized by comprising the following steps of:
s1, manufacturing a fiber raw material: the agricultural and forestry waste is prepared by mixing crop straw and wood, steaming by a chemical method, adding a steaming auxiliary agent, pulping by a pulping machine, and drying to obtain natural-color slurry, and specifically comprises the following steps:
s11, selecting crop straws and wood which are agricultural and forestry waste, wherein the crop straws are 60-80 parts by weight and the wood is 20-40 parts by weight, uniformly mixing, placing the mixture in a cooking pot, and adding sodium dithionite solution with the mass concentration of 1% as a cooking auxiliary agent for cooking;
s12, screening the steamed mixed slurry by a screening machine, and conveying the screened mixed slurry into a pulping machine for pulping treatment, wherein the pulping degree of the slurry is controlled to be 30+/-2 DEG SR;
s13, placing the pulped slurry in an oven for drying to obtain natural-color slurry for standby;
s2, manufacturing a synthetic leather base material: the prepared natural color sizing agent is subjected to coarse opening, fine opening, carding, lapping and molding, and is sent to a hydroentangling machine for hydroentangling reinforcement and shaping after lapping and molding to prepare the synthetic leather base material, which comprises the following steps:
s21, placing the natural-color slurry in a coarse opener for coarse opening, and then placing the natural-color slurry in a fine opener for fine opening to uniformly spread the natural-color slurry;
s22, placing the uniformly spread unbleached pulp into a carding machine for carding, and then using a lapping machine for lapping and forming;
s23, conveying the base material after net laying molding into a hydro-entangling machine for hydro-entangling reinforcement, and then drying and shaping to obtain the synthetic leather base material, wherein the ration of the base material is controlled to be 150+/-5 g/m 2 ；
S3, manufacturing synthetic leather: soaking synthetic leather substrate in biobased resin soaking solution uniformly, taking out the substrate, drying with hot air at 135-165 deg.C, and controlling final coating weight of 50+ -5 g/m 2 The leather raw skin is obtained, and the bio-based resin impregnating solution is prepared by the following steps: 80-100 parts of acrylic resin, 2-4 parts of thickener polyethylene glycol, 1-3 parts of activator fatty alcohol polyoxyethylene ether and 1-2 parts of softener pentaerythritol fatty acid ester, and uniformly stirring after mixing;
s4, post-processing treatment of the synthetic leather: and dyeing, embossing and kneading the prepared raw leather to obtain a finished product.
2. The method for preparing degradable artificial leather based on agricultural and forestry waste according to claim 1, wherein: the embossing in the step S4 adopts one of flat embossing and roller embossing.
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| AT141128B (en) * | 1932-12-16 | 1935-03-25 | Johann Froehlich Fa | Process for the aftertreatment of synthetic leather panels made from a mixture of rag and cellulose as well as latex as a binding agent, which is precipitated on the fiber with an acid salt. |
| GB435728A (en) * | 1933-04-01 | 1935-09-26 | Du Pont | Improvements in or relating to the impregnation of felted cellulosic fibrous materials |
| CN100594269C (en) * | 2008-08-18 | 2010-03-17 | 福建南纺股份有限公司 | Needle punching viscose composite clothing leather foundation cloth manufacturing method |
| CN101435162A (en) * | 2008-12-29 | 2009-05-20 | 郑州枫林无纺科技有限公司 | Formula of foam dyeing system and foam dyeing method of base cloth for multifunctional water stabbed superfine fiber leather |
| PT3385421T (en) * | 2010-05-25 | 2022-01-19 | Ananas Anam Uk Ltd | Natural nonwoven materials |
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