CN116427181B - High-added-value coffee yarn synthetic leather and production method thereof - Google Patents

High-added-value coffee yarn synthetic leather and production method thereof Download PDF

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Publication number
CN116427181B
CN116427181B CN202310464760.7A CN202310464760A CN116427181B CN 116427181 B CN116427181 B CN 116427181B CN 202310464760 A CN202310464760 A CN 202310464760A CN 116427181 B CN116427181 B CN 116427181B
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coffee
synthetic leather
coating
resin
impregnation
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CN116427181A (en
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苏加明
丘冰方
陈欢欢
李柳燕
何秋梅
毛琳
柯博元
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Anta China Co Ltd
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Anta China Co Ltd
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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
    • 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
    • D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0034—Polyamide fibres
    • 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
    • D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0036—Polyester fibres
    • 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
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • 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
    • 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
    • D06N3/007—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
    • 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
    • D06N3/12—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
    • 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
    • D06N3/12—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
    • D06N3/121—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 with polyesters, polycarbonates, alkyds
    • D06N3/123—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 with polyesters, polycarbonates, alkyds with polyesters
    • 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
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/121—Permeability to gases, adsorption
    • D06N2209/123—Breathable
    • D—TEXTILES; PAPER
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    • 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
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather
    • 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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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention belongs to the field of synthetic leather, and discloses a high-added-value coffee yarn synthetic leather and a production method thereof, wherein non-woven fabrics containing coffee short fibers are used as a substrate; the non-woven fabric substrate is sequentially subjected to impregnation material rolling, pre-solidification and coating, and then is solidified in water to obtain a semi-finished product, the impregnation material is fluorine-free and adopts hydrolysis-resistant impregnation resin, the coating process adopts polyester polyether blending resin, wood flour is added, and the solidified semi-finished product is subjected to water washing and is heated and dried to obtain the coffee yarn synthetic leather. According to the invention, the non-woven fabric containing the coffee short fibers is used as a substrate, and fluorine-free resin with proper modulus is selected for matching, and the foam cells of the PU coating are increased by adding the wood powder in the formula, so that the air permeability of the PU coating is better. According to the invention, the machine process is adjusted, and the synthetic leather with high physical properties such as ventilation, good hand feeling and the like is developed through combining the wet process flow with the coffee carbon fiber base cloth, and the coffee yarn synthetic leather has good environmental protection and high added value.

Description

High-added-value coffee yarn synthetic leather and production method thereof
Technical Field
The invention belongs to the technical field of synthetic leather, and particularly relates to coffee yarn synthetic leather with high added value and a production method thereof.
Background
Natural leather is widely used for the production of daily necessities and industrial goods due to its excellent natural properties, but as the demand for leather by humans is multiplied, a limited number of natural leather has not been able to meet the demand. To solve the contradiction, scientists begin to research and develop artificial leather and synthetic leather to make up for the shortages of natural leather. The earliest synthetic leather uses synthetic fiber non-woven fabrics such as terylene, chinlon and the like as a base, the middle is reinforced by fabric, and is immersed in Polyurethane (PU) solution similar to the composition of natural leather collagen fiber, the polyurethane solution is solidified in water, the solvent is replaced by water to form tiny holes, and a tough and elastic microporous layer is formed from the surface to the inside, so that the synthetic leather becomes a surface layer and is integrated with the base.
The present synthetic leather is generally prepared by taking impregnated non-woven fabrics as a reticular layer and taking a microporous polyurethane layer as a grain surface layer, has quite similar front and back surfaces as leather and certain air permeability, is more similar to natural leather than common artificial leather, and can be applied to products such as textile clothing, shoes, bags, suitcases, decorations and the like. Today, the safety and the health care are more and more concerned, people put forward higher requirements on textile articles and ornaments, not only meet new requirements of comfort and fashion, but also are more close to the green, environment-friendly and low-carbon era theme.
Disclosure of Invention
In view of the above, the invention provides the coffee yarn synthetic leather with high added value and the production method thereof, and the environment-friendly synthetic leather with good hand feeling and ventilation and higher functional added value can be produced by the process method.
The invention provides a production method of coffee yarn synthetic leather with high added value, which comprises the following steps:
taking non-woven fabric containing coffee short fibers as a substrate;
Sequentially carrying out impregnation material rolling, pre-solidification and coating on the non-woven fabric substrate, and then solidifying in water to obtain a semi-finished product, wherein the impregnation material is fluorine-free and adopts hydrolysis-resistant impregnation resin, and the coating process adopts polyester polyether blending resin and wood powder is added;
And washing the coagulated semi-finished product with water, and heating and drying to obtain the coffee yarn synthetic leather.
Preferably, the non-woven fabric substrate comprises coffee short fibers, nylon and recycled polyester, and the mass ratio of the coffee short fibers in the substrate is 15-20%.
Preferably, the impregnation material is obtained by stirring and mixing hydrolysis-resistant impregnation resin and a first solvent, and the room temperature viscosity of the impregnation material is controlled to be 80-200cps.
Preferably, the slurry of the coating is fluorine-free and is obtained by stirring and mixing polyester polyether blend resin, wood powder and a second solvent, and the mixed slurry is stirred for 30-35 minutes at the stirring speed of 1000-1500r/min at normal temperature.
Preferably, the weight ratio of the polyester polyether blend resin to the wood powder in the slurry in the coating process is 100:1-5, and the room temperature viscosity of the slurry is 10000-12000cps.
Preferably, the first solvent and the second solvent are dimethylformamide, and the color paste is optionally added into the slurry of the impregnating material and the coating.
Preferably, the water solidification adopts a three-layer solidification mode, and the feeding speed is 10-12m/min.
Preferably, the thickness of the solidified semi-finished product is controlled to be 1.35-1.40mm, a plurality of groups of washing tanks are arranged in the washing process, and the final washing temperature is controlled to be 60-80 ℃.
Preferably, the heating and drying comprises the steps of blanching by a blanching roller at 100-120 ℃, and then drying at 140-160 ℃.
The invention provides coffee yarn synthetic leather obtained by the production method, wherein the thickness is 1.1-1.2mm, and/or the softness test value is 1.9-2.5.
The coffee carbon fiber is prepared by calcining the coffee grounds left after coffee drinking, grinding the crystals into nano powder, and adding the nano powder into the polyester fiber. Coffee is one of daily drinks, and residues after coffee preparation have some residual value effects, such as peculiar smell absorption, dehumidification and sweat guiding, and recycling. Some enterprises apply nano technology to daily waste coffee grounds, and combine nano silver particles and water-absorbing polymer compounds at high temperature and activation, so as to develop functional fibers (called coffee yarns for short) taking terylene, chinlon, viscose and the like as carriers. Wherein, the coffee grounds are calcined at more than 1000 ℃ to lead the crystal phase and the pores to be in the optimal state, the latest nanotechnology is used for micronization, the powder is ground into 100-300 nanometers, and then the powder is processed into master batches suitable for fiber production by a special process, the spinning and drafting processes which are suitable for research are carried out, and the spinnability of the product in a post processing factory is ensured. Finally, special spinneret plates and the like can be designed to solve the processing problems in key production processes such as drying, spinning, drafting and the like.
The coffee yarn has the following functions of 1, environmental protection, namely, the carbon footprint is reduced, the carbon emission is reduced by 48% compared with bamboo charcoal, and the carbon emission is reduced by 85% compared with coconut charcoal. 2. The porous adsorption effect of the coffee grounds effectively controls the body surface moisture, thereby playing a role in inhibiting bacterial reproduction, and the odor ammonia released during bacterial reproduction is also greatly reduced, so that the coffee carbon can also effectively deodorize. 3. The temperature rise and heat preservation performance is that the temperature rise of the coffee carbon fiber is higher than that of the common PET fiber under the irradiation of light, so that the natural and warm comfort can be enjoyed. The coffee carbon fiber has good adsorption and air permeability, and how to combine the coffee carbon fiber with the coffee carbon fiber better through the PU wet process is a main difficulty of the invention.
Compared with the prior art, the invention adopts the non-woven fabric base fabric containing the coffee short fibers, and sequentially passes through impregnation material rolling, pre-solidification and coating, then solidifies in water to obtain a semi-finished product, and then carries out washing and heating drying to obtain the coffee yarn synthetic leather, wherein the impregnation material is fluorine-free and adopts hydrolysis-resistant impregnation resin, and the coating process adopts polyester polyether blending resin and wood flour is added. According to the invention, the non-woven fabric containing the coffee short fibers is used as a substrate, and fluorine-free resin with proper modulus is selected for matching, and the foam cells of the PU coating are increased by adding the wood powder in the formula, so that the air permeability of the PU coating is better. According to the invention, the machine process is adjusted, and the synthetic leather with high physical properties such as ventilation, good hand feeling and the like is developed through combining the wet process flow with the coffee carbon fiber base cloth, and the coffee yarn synthetic leather has good environmental protection, high added value and is beneficial to application.
Drawings
FIG. 1 is a schematic flow chart of a production device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a production device according to a comparative example of the present invention;
FIG. 3 is a photograph of the cell structure of the synthetic leather produced in example 1 of the present invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The invention provides a production method of coffee yarn synthetic leather with high added value, which comprises the following steps:
taking non-woven fabric containing coffee short fibers as a substrate;
Sequentially carrying out impregnation material rolling, pre-solidification and coating on the non-woven fabric substrate, and then solidifying in water to obtain a semi-finished product, wherein the impregnation material is fluorine-free and adopts hydrolysis-resistant impregnation resin, and the coating process adopts polyester polyether blending resin and wood powder is added;
And washing the coagulated semi-finished product with water, and heating and drying to obtain the coffee yarn synthetic leather.
The process method can produce the environment-friendly synthetic leather with good hand feeling and ventilation and has high added value.
Referring to fig. 1, fig. 1 is a schematic flow chart of a production device according to an embodiment of the invention. According to the embodiment of the invention, the commercial coffee yarn short fiber (mainly purchased from the Wolkava chemical fiber company) is used as the core part of the synthetic leather base fabric, the coffee yarn-containing non-woven fabric base is produced by adding a certain proportion of coffee yarn short fiber, nylon and polyester, and the synthetic leather with high added value is produced by the two-step wet process flow of the coffee yarn base fabric and PU.
The non-woven fabric substrate provided by the embodiment of the invention is selected from non-woven fabrics containing coffee short fibers, and nylon with a certain proportion is added into the non-woven fabrics in consideration of the problem of comfort of hands. In a preferred embodiment of the present invention, the nonwoven fabric substrate component comprises coffee staple fibers, nylon and recycled polyester, and the nonwoven fabric may be selected from commercially available or prepared as a synthetic leather substrate. Preferably, the mass ratio of the coffee short fiber in the substrate is 15-20%, the nylon (chinlon) ratio is 25-30%, and the recovered terylene ratio is preferably 50-55%.
And, the nonwoven substrate may have a thickness of 0.7 to 0.95 mm and a grammage (weight per square meter) of generally 200to 250 grams. In some embodiments of the application, the nonwoven substrate is controlled to have a thickness of 0.7-0.8 millimeters, a grammage (weight per square meter) of 200-220 grams, preferably 205-215 grams, a burst of 18kgf/CM 2, a tensile strength of >300N/3CM, a weft direction of >300N/3CM, an elongation at break of 40-90%, a weft direction of 60-120%, preferably an elongation at break of 50-70%, a weft direction of 80-100%. In other embodiments, the nonwoven substrate has a thickness of 0.85 to 0.95 millimeters, a grammage (weight per square meter) of 225 to 245 grams, preferably 230 to 240 grams, a burst of 20kgf/CM 2, a tensile strength of >350N/3CM, a weft direction of >350N/3CM, an elongation at break of 40 to 90%, a weft direction of 60to 120%, preferably an elongation at break of 50to 60%, and a weft direction of 80to 90%.
In the embodiment of the invention, the non-woven fabric substrate is unreeled and then impregnated and rolled (impregnated for short), namely, the non-woven fabric containing the coffee short fibers is firstly subjected to cloth storage frame, the speed is preferably 10-12m/min, and then is subjected to an impregnation tank with the impregnated material, wherein the pressure of an impregnated oil pressing roller is controlled, and the pressure can be controlled to be 5-5.5Kg. In the embodiment of the invention, hydrolysis-resistant impregnating resin, preferably DMI (1, 3-dimethyl-2-imidazolidinone)/BDO (1, 4-butanediol) polyurethane polyol, is selected and used, and does not contain fluorine compounds. Specifically, the solid content of the material can be 30%, the percentage modulus is 90MPa, the tensile strength is more than 20MPa, the elongation is more than or equal to 300%, and the viscosity is 100000-120000cps/25 ℃. The resin has higher speed when the DMF solution is solidified, and the cells are larger, so that the air permeability of the impregnation material is better.
In a preferred embodiment of the present invention, the impregnation material is obtained by stirring and mixing a hydrolysis-resistant impregnation resin and a first solvent, and the first solvent is preferably Dimethylformamide (DMF). The impregnating material can also comprise a tearing-resistant additive, a nonionic surfactant, a hydrolysis-resistant additive, a leveling agent, a color paste and the like, wherein the tearing-resistant additive mainly aims at improving the bonding strength between non-woven fabrics and the integral tearing strength of finished leather, and can be commercially available products such as a tearing-resistant additive XCW-08WH (purchased from Xuchuan chemical Co., ltd.). The nonionic surfactant is preferably S-7 (available from Shanghai polymer materials Co., ltd.) and mainly comprises polyether and silicone oil, and has no fluoride ion and certain effect on regulating cells and hand feeling. The hydrolysis-resistant auxiliary agent is preferably SI-121 (purchased from Sanchiku Co., ltd.) and mainly comprises propylene polycarbosilane modified polymer, and can prevent bubble generation and improve hydrolysis resistance when used for impregnation. The main component of the leveling agent is organic silicon, and the leveling agent is added into the impregnating material, so that the dispersibility of color paste can be improved, and spots can be prevented, for example, a commercial product HS-1868 (purchased from Minglong chemical Co., ltd.). The color paste is a low toxicity pigment with viscosity of 6000-8000 cps/25deg.C.
When the preferred embodiment of the application is specifically configured, the impregnating resin, the dimethylformamide, the tearing-resistant auxiliary agent, the nonionic surfactant, the hydrolysis-resistant auxiliary agent, the leveling agent and the color paste are added according to the weight ratio of 100:300-380:15-17:0.5-1:1-2:1-2:15-20. The impregnation resin has a high solidification speed, and the cells are large, so that the problem is solved by adjusting the viscosity of the impregnation material in order to ensure the hand feeling. In some examples, the different tests show that when the added parts of the dimethylformamide are 300-380 parts, the softness of the hand feeling can meet the requirements. Through test comparison, when the addition amount of the anti-tearing auxiliary agent exceeds 18 parts, the risk of the adhesive exists, and when the anti-tearing auxiliary agent is added by 15-17 parts, the tearing strength meets the requirement and the risk of the adhesive does not exist. Preferably, the main ingredient mixed impregnation liquid is stirred at a stirring speed of 1000-1500r/min at normal temperature for 15-20 minutes until the resin, the color paste and the hydrolysis resistance auxiliary agent are completely dissolved, and the room temperature viscosity is controlled to be 80-200cps (in some embodiments, 80-120cps, preferably 90-110cps, or 140-200cps, preferably 150-170 cps).
After the impregnation is finished, the sugar degree can be 30-32% (the sugar degree is the concentration of DMF in DMF aqueous solution, the sugar degree is obtained by measuring the obtained data through an Abbe refractometer, and the pressure of a pre-solidified oil press roll is also controlled to be 5-5.5Kg. Then, the embodiment of the invention passes through a six-wheel ironing device (the ironing temperature is controlled to be 50 ℃), and finally passes through a coating table device provided with a coating knife.
For the selection of polyurethane resin in the coating process, polyester polyether blend type resin is selected in the embodiment of the invention, and the polyester polyether blend type resin has the advantages of high solid content, excellent leather rebound resilience, high peel strength and no fluorine compound in the resin. Specifically, the solid content is preferably 35-40%, the percentage modulus is 50MPa, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, the viscosity is 160000-180000cps/25 ℃, and the product is commercially available. The resin has fine cells and high peel strength, and the invention mainly adjusts the cells in the coating formula in order to better match the air permeability effect of the base fabric.
The embodiment of the invention carries out configuration of front-side coating sizing agent (fabric for short), wherein, polyester polyether blend type resin, dimethylformamide, nonionic active agent, hydrolysis resistance auxiliary agent and color paste are added according to the weight ratio of 100:40:0.5-1:0.5-1:1-2, dimethylformamide is taken as solvent, and other additives can be the same as the impregnating material. The nonionic surfactant is added into the fabric, so that the uniformity of the whole cells of the coating can be adjusted, and the water washing effect is improved. The hydrolysis resistance auxiliary agent is added into the fabric, so that the integral hydrolysis resistance can be improved. The formula is tested to have high peel strength, finer cells and air permeability which are not in accordance with the expected effect, and in order to solve the problem, the cells are enlarged by adding wood powder as a filler into the formula. The wood powder has large specific surface area, small density and low cost, the number of the wood powder is preferably controlled to be 200-300 meshes, and the wood powder cannot be added too much, so that insufficient peeling strength is easily caused. Through adding different parts of wood powder, the addition amount of 1-5 parts, preferably 3 parts, is finally determined, and the requirements can be met.
Further, the mixed fabric is stirred at a high speed of 1000-1500r/min at normal temperature for 30-35 minutes until the polyurethane, the filler, the color paste and the hydrolysis resistance auxiliary agent are completely dissolved, the time of stirring the fabric at the high speed is strictly controlled between 30-35 minutes, the too short time of stirring the slurry is likely to be insufficient, and the too long time can cause the material temperature to be too high, so that the material is dead. Stirring to uniformity, reducing stirring speed to 300+ -50 r/min, vacuum defoaming for 90min, and controlling viscosity to 10000cps-12000cps (temperature 32 deg.C), preferably 11000cps. In the process of coating slurry, the thickness of the coating can be controlled by adjusting the clearance of a scraper, the clearance of the coating is controlled between 205+/-5 wires, and the coating weight is 1.3+/-0.05 kg/y. After blanking, the surface condition of the coating is observed, and the abnormal situation is treated in time.
After finishing coating, if the coating is solidified in water in a single-layer solidification tank, the solidification speed is too high, and as wood powder is added into the formula, the bubbles are larger and peeling is affected, the invention prefers that the solidification in water adopts a three-layer solidification mode, and the feeding speed is 10-12m/min. In the preferred embodiment of the invention, the coated surface layer enters a three-fold solidification tank (shown in figure 1) with the length of 30 meters, is solidified in water for a long time, and the water replaces DMF to realize the foaming of the wet coating, the solidification sugar degree can be 18-21%, and the temperature is 30+/-2 ℃. According to the embodiment of the invention, the solidification time of the solidification tank is increased by the solidification of the three-fold solidification tank, so that the slurry is solidified more fully, and the cells are finer, thus the combination treatment of the coating cells, the formula and the production process is integrated, and the produced product meets the requirements of physical properties, hand feeling and the like.
After the synthetic leather semi-finished product obtained by the embodiment of the invention is discharged from the coagulation tank, the surface condition is observed, the thickness and the width are measured, the thickness is preferably controlled to be 1.35-1.40mm, and the width is preferably controlled to be 1.47-1.49 m. Then the fabric enters a plurality of groups of washing tanks to wash DMFA in BASE fabric (Base), generally 15 groups of washing tanks are arranged, the washing sugar degree of the first six groups can be controlled to be 20-10%, the washing sugar degree of the middle six groups is controlled to be 10-0%, the washing sugar degree of the last three groups is controlled to be 0%, and the washing temperature of the last three groups is controlled to be 70 ℃ plus or minus 5.
In the specific embodiment of the invention, the heat drying of the bass after the water outlet washing tank preferably comprises the steps of pre-ironing the bass by eight rounds (the temperature is 110+/-10 ℃) of ironing rollers (heating rollers), and drying the pre-ironed bass by using a drying oven, wherein the drying oven sequentially comprises the drying oven temperature of a first group of drying oven at 150 ℃, the drying oven temperature of a second group to four groups of drying oven at 160 ℃, and the drying oven temperature of a fifth group of drying oven at 140 ℃ to completely dry. According to the embodiment of the invention, the synthetic leather can be cooled and rolled after being dried, the thickness of the synthetic leather product is 1.1-1.2mm, and the breadth is 145-147cm.
The embodiment of the invention provides the coffee yarn synthetic leather obtained by the production method, wherein the thickness is 1.1-1.2mm, and/or the softness test value is 1.9-2.5.
According to the implementation steps, the embodiment of the invention can be used for manufacturing the coffee yarn synthetic leather (also called coffee grounds synthetic leather and the like) in a consistent operation mode. The produced bass finished product can be peeled off by three centimeters, can reach 120N/3cm, has softness test value of 1.9-2.5, has fluorine content compounded with environmental protection requirement, has good adsorption and ventilation effects, and has a certain effect on deodorization.
In order to better understand the technical content of the present invention, the following provides specific examples to further illustrate the present invention. In the following examples, 2 nonwoven fabrics of different specifications (all produced by Fujian south spinning sanitary materials Co., ltd., wherein 18% of coffee yarn staple fiber, 30% of nylon, 52% of recycled polyester from Wo Kaisi chemical fiber were added) were selected:
(1) The thickness of the non-woven fabric is controlled to be 0.7-0.8 mm, the gram weight (weight per square meter) is 205-215 g, the blasting is 18kgf/CM 2, the tensile strength warp direction is >300N/3CM, the weft direction is >300N/3CM, the elongation at break warp direction is 50-70% and the weft direction is 80-100%, the thickness of the non-woven fabric is 0.85-0.95 mm, and the gram weight (weight per square meter) is 230-240 g. The explosion is 20kgf/CM 2, the tensile strength warp direction is more than 350N/3CM, the weft direction is more than 350N/3CM, the elongation at break warp direction is 50-60%, and the weft direction is 80-90%.
Hydrolysis-resistant impregnating resin DMI/BDO polyurethane polyol, and does not contain fluorine compounds, wherein the solid content is 30%, the percentage modulus is 90MPa, the tensile strength is more than 20MPa, the elongation is more than or equal to 300%, and the viscosity is 100000-120000cps/25 ℃;
The polyester polyether blend resin contains no fluorine compound, the solid content is 35%, the percentage modulus is 50MPa, the tensile strength is more than 45MPa, the elongation is more than or equal to 500%, and the viscosity is 160000-180000cps/25 ℃.
The wood flour is controlled to be 200-300 meshes, the tear-resistant additive XCW-08WH is purchased from Asahi Sichuan chemical, the nonionic surfactant S-7 is purchased from Shanghai daily high polymer material Co., ltd, the hydrolysis-resistant additive SI-121 is purchased from Sanchi chemical, the leveling agent HS-1868 is purchased from Minglong chemical Co., ltd, and the viscosity range of the color paste is 6000-8000cps/25 ℃ and blue.
Example 1
(1) Using non-woven fabrics with the specification of 0.7-0.8 mm, passing through a cloth storage rack at the front, and the speed of 10m/min, then the mixture passes through an impregnation tank with impregnation materials, and the pressure of an impregnation oil press roll is controlled to be 5-5.5Kg. After impregnation, the sugar degree is 30-32% through pre-solidification liquid, the pressure of a pre-solidification oil press roller is controlled to be 5-5.5Kg, the pre-solidification oil press roller is subjected to six-round ironing device (the ironing temperature is controlled to be 50 ℃), and finally the pre-solidification oil press roller is subjected to coating by a coating table device provided with a coating knife, and meanwhile, fabrics prepared according to the method are coated on non-woven fabrics along a scraper. The coating gap is controlled between 205+/-5 wires, and the coating weight is 1.3+/-0.05 kg/y.
The preparation of the impregnation material comprises the steps of adding hydrolysis-resistant impregnation resin, dimethylformamide, a tearing-resistant auxiliary agent, a nonionic surfactant, a hydrolysis-resistant auxiliary agent, a leveling agent and a color paste according to the weight ratio of 100:300:15:1:1:1:20, stirring the mixed impregnation liquid at the stirring speed of 1000r/min for 15-20 minutes at normal temperature until the mixed impregnation liquid is completely dissolved, and controlling the viscosity to 140-200cps.
The preparation of the fabric comprises the steps of adding polyester polyether blend type resin, dimethyl formamide, a nonionic activator, a hydrolysis resistance auxiliary agent, color paste and wood powder according to the weight ratio of 100:40:1:0.5:2:3, stirring the fabric at normal temperature at a stirring speed of 1500r/min for 30-35 minutes until the fabric is completely dissolved, stirring until the slurry is uniform, reducing the stirring speed to 300+/-50 r/min, performing vacuum defoaming for 90 minutes, and controlling the viscosity to 10000cps-12000cps (the temperature is 32 ℃).
(2) The coated surface layer enters a three-fold solidification tank (the water solidification length reaches 84 meters, the solidification time is 7 minutes, and the solidification speed is 12 meters/minute) with the length of 30 meters, the solidification sugar degree is 18-21%, and the temperature is 30+/-2 ℃.
(3) After the semi-finished product of the synthetic leather comes out of the coagulation tank, the thickness is controlled to be 1.35-1.40mm, and the breadth is controlled to be 1.47-1.49 m. Then the water enters a water washing tank (15 groups), the water washing sugar degree of the first six groups is controlled to be 20-10%, the water washing sugar degree of the middle six groups is controlled to be 10-0%, the water washing sugar degree of the last three groups is controlled to be 0%, and the water washing temperature of the last three groups is controlled to be 70 ℃ plus or minus 5.
(4) The bass after water washing tank is pre-heated by eight-wheel (110+ -10 ℃) ironing rollers, and the pre-heated bass is dried by a drying oven, wherein the drying oven sequentially comprises a first group of drying ovens with the temperature of 150 ℃, a second group of drying ovens with the temperature of 160 ℃ to four groups of drying ovens with the temperature of 140 ℃ to completely dry. The thickness of the rolled paper after drying is 1.1-1.2mm, and the breadth is 145-147cm.
(5) The produced coffee grounds synthetic leather is tested to be stripped by a three-centimeter opposite-sticking method to reach 120N/3cm, and the softness value is tested to be 2.0-2.5 by a softness tester.
Example 2
(1) Using non-woven fabrics with the specification of 0.85-0.95 mm, passing through a cloth storage rack at the front, and the speed of 10m/min, then the mixture passes through an impregnation tank with impregnation materials, and the pressure of an impregnation oil press roll is controlled to be 5-5.5Kg. After impregnation, the sugar degree is 30-32% through pre-solidification liquid, the pressure of a pre-solidification oil press roller is controlled to be 5-5.5Kg, the pre-solidification oil press roller is subjected to six-round ironing device (the ironing temperature is controlled to be 50 ℃), and finally the pre-solidification oil press roller is subjected to coating by a coating table device provided with a coating knife, and meanwhile, fabrics prepared according to the method are coated on non-woven fabrics along a scraper. The coating gap is controlled between 205+/-5 wires, and the coating weight is 1.3+/-0.05 kg/y.
The preparation of the impregnation material comprises the steps of adding hydrolysis-resistant impregnation resin, dimethylformamide, a tearing-resistant auxiliary agent, a nonionic surfactant, a hydrolysis-resistant auxiliary agent, a leveling agent and a color paste according to the weight ratio of 100:380:15:1:1:1:20, and stirring the mixed impregnation liquid at the stirring speed of 1000r/min for 15-20 minutes at normal temperature to completely dissolve. The non-woven fabric with thicker thickness specification is selected, and the added parts of the dimethylformamide are properly adjusted, so that the viscosity of the impregnation material is reduced, and the viscosity is controlled to be 80-120cps, thereby ensuring the whole hand feeling.
The preparation of the fabric comprises the steps of adding polyester polyether blend type resin, dimethyl formamide, a nonionic activator, a hydrolysis resistance auxiliary agent, color paste and wood powder according to the weight ratio of 100:40:1:0.5:2:3, stirring the fabric at normal temperature at a stirring speed of 1500r/min for 30-35 minutes until the fabric is completely dissolved, stirring until the slurry is uniform, reducing the stirring speed to 300+/-50 r/min, performing vacuum defoaming for 90 minutes, and controlling the viscosity to 10000cps-12000cps (the temperature is 32 ℃).
(2) The coated surface layer enters a three-fold solidification tank (the water solidification length reaches 84 meters, the solidification time is 8.4 minutes, and the solidification speed is 10 meters/minute) with the length of 30 meters, the solidification sugar degree is 18-21%, and the temperature is 30+/-2 ℃.
(3) After the semi-finished product of the synthetic leather comes out of the coagulation tank, the thickness is controlled to be 1.35-1.40mm, and the breadth is controlled to be 1.47-1.49 m. Then the water enters a water washing tank (15 groups), the water washing sugar degree of the first six groups is controlled to be 20-10%, the water washing sugar degree of the middle six groups is controlled to be 10-0%, the water washing sugar degree of the last three groups is controlled to be 0%, and the water washing temperature of the last three groups is controlled to be 70 ℃ plus or minus 5.
(4) The bass after water washing tank is pre-heated by eight-wheel (110+ -10 ℃) ironing rollers, and the pre-heated bass is dried by a drying oven, wherein the drying oven sequentially comprises a first group of drying ovens with the temperature of 150 ℃, a second group of drying ovens with the temperature of 160 ℃ to four groups of drying ovens with the temperature of 140 ℃ to completely dry. The thickness of the rolled paper after drying is 1.1-1.2mm, and the breadth is 145-147cm.
(5) The produced coffee grounds synthetic leather is tested to be stripped by three centimeters, the thickness reaches 115N/3cm, and the softness test value is between 1.9 and 2.3.
Comparative example
The process was carried out according to the procedure described in FIG. 2, the process conditions being substantially the same as in example 1, except that the resin was a polyester-type coating resin + a water repellent agent, more containing fluoride, and that the resin was coagulated in water using a single-layer coagulation tank for 30m in water coagulation length for 2.5 min at a coagulation rate of 12 m/min.
In the process of fig. 2, the single layer is solidified during solidification, the solidification speed is high, the cells are coarse, the peeling data of the three cm pair is 80N/3cm, the cell layer structure is coarse, the overall hand feeling and air permeability are improved, but in order to ensure the peeling strength, the overall process formula is synthesized, and the process conditions of fig. 1 are selected to be more in accordance with the expected test results.
By observing the cell layer structure with a magnifying glass, example 1 has a blue cell structure as shown in fig. 3, the cell distribution is more uniform, the dense layer is thinner, and a certain effect is achieved in terms of air permeability.
As can be seen from the above examples, the base fabric of the present invention comprises a recyclable coffee grounds staple fiber component, and a fluorine-free resin with a suitable modulus is selected for matching, and the formula is added with wood flour to enlarge the cells of the PU coating, so that the air permeability is better. The invention adjusts the machine process, combines the wet process flow with the coffee carbon fiber base cloth, and the synthetic leather produced by the base cloth has the characteristics of good air permeability, good rebound resilience, environmental protection, high adsorptivity, deodorization and the like, and is beneficial to application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The production method of the coffee yarn synthetic leather is characterized by comprising the following steps of:
the non-woven fabric containing the coffee short fibers is used as a base, the base comprises the coffee short fibers, nylon and recovered terylene, and the mass ratio of the coffee short fibers in the base is 15-20%;
Sequentially carrying out impregnation material rolling, pre-solidification and coating on the substrate, and then solidifying in water to obtain a semi-finished product, wherein the impregnation material is fluorine-free and adopts hydrolysis-resistant impregnation resin, the coating process adopts polyester polyether blending type resin, and wood powder is added, and the weight ratio of the polyester polyether blending type resin to the wood powder in the slurry in the coating process is 100:1-5;
And washing the coagulated semi-finished product with water, and heating and drying to obtain the coffee yarn synthetic leather.
2. The method according to claim 1, wherein the impregnation material is obtained by mixing a hydrolysis-resistant impregnation resin and a first solvent with stirring, and the viscosity of the impregnation material at room temperature is controlled to be 80-200cps.
3. The production method according to claim 2, wherein the slurry of the coating layer is fluorine-free and is obtained by stirring and mixing a polyester polyether blended resin, wood flour and a second solvent, and the mixed slurry is stirred at a stirring speed of 1000-1500r/min for 30-35 minutes at normal temperature.
4. A method of manufacture according to claim 3 wherein the coating process slurry has a room temperature viscosity of 10000-12000cps.
5. The method according to claim 3, wherein the first solvent and the second solvent are dimethylformamide, and the impregnating material and the coating layer are each added with a color paste.
6. The method according to any one of claims 1 to 5, wherein the in-water solidification adopts a three-layer solidification method, and the feeding speed is 10 to 12m/min.
7. The production method according to claim 6, wherein the thickness of the solidified semi-finished product is controlled to be 1.35-1.40mm, a plurality of groups of washing tanks are arranged in the washing process, and the final washing temperature is controlled to be 60-80 ℃.
8. The method according to claim 7, wherein the heat drying comprises blanching with a blanching roller at 100-120 ℃, followed by drying at 140-160 ℃.
9. A synthetic leather of coffee yarn obtained by the production process according to any one of claims 1 to 8, having a thickness of 1.1 to 1.2mm and/or a softness test value of between 1.9 and 2.5.
CN202310464760.7A 2023-04-26 2023-04-26 High-added-value coffee yarn synthetic leather and production method thereof Active CN116427181B (en)

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KR20230018190A (en) * 2021-07-29 2023-02-07 티케이지에코머티리얼 주식회사 Manufacturing method of synthetic leather to recycle the coffee leftover

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