CN117071297A - Ecological environment-friendly bio-based TPU furniture leather and preparation method thereof - Google Patents

Ecological environment-friendly bio-based TPU furniture leather and preparation method thereof Download PDF

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Publication number
CN117071297A
CN117071297A CN202311071596.XA CN202311071596A CN117071297A CN 117071297 A CN117071297 A CN 117071297A CN 202311071596 A CN202311071596 A CN 202311071596A CN 117071297 A CN117071297 A CN 117071297A
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Prior art keywords
tpu
surface layer
parts
layer
agent
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Chinese (zh)
Inventor
严雪峰
洪斌
彭文彬
付鹏飞
周少峰
陈永
陈倩
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Zhejiang Hexin New Material Co ltd
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Zhejiang Hexin New Material Co ltd
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Priority to CN202311071596.XA priority Critical patent/CN117071297A/en
Publication of CN117071297A publication Critical patent/CN117071297A/en
Pending legal-status Critical Current

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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, 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
    • D06N3/00Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12Artificial 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
    • D06N3/14Artificial 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 polyurethanes
    • D06N3/145Artificial 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 polyurethanes two or more layers of polyurethanes
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, 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
    • D06N3/00Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011Artificial 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
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, 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
    • D06N3/00Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015Artificial 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
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, 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
    • D06N3/00Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043Artificial 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
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, 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
    • D06N3/00Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056Artificial 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
    • D06N3/0059Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, 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
    • D06N2211/00Specially adapted uses
    • D06N2211/12Decorative or sun protection articles
    • D06N2211/28Artificial leather
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62Manufacturing 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)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses ecological environment-friendly bio-based TPU furniture leather and a preparation method thereof, wherein the preparation method comprises the following steps: uniformly mixing TPU particles, filler and foaming agent of a foaming layer in a single screw extruder, carrying out melt extrusion at 145-190 ℃, and carrying out roller coating on a bottom coating layer to obtain the foaming layer; step (2), putting the surface layer TPU particles, the filler, the halogen-free flame retardant, the ultraviolet-resistant additive, the organosilicon wear-resistant handfeel agent and the color master batch into an internal mixer, uniformly mixing, calendaring at 240 ℃ through a calendar to obtain a surface layer, and laminating and compounding with a foaming layer; and (3) uniformly mixing the aqueous polyurethane, the cross-linking agent, the leveling agent, the defoaming agent, the aqueous flame retardant, the ultraviolet-resistant additive and the color paste to obtain aqueous PU slurry, coating the aqueous PU slurry on a surface layer, and drying at 150 ℃ to form a surface layer to obtain the TPU furniture leather. The preparation process is simple, and the produced bio-based TPU furniture leather is environment-friendly, has renewable material sources and meets the requirement of sustainable development.

Description

Ecological environment-friendly bio-based TPU furniture leather and preparation method thereof
Technical Field
The invention belongs to the technical field of synthetic leather production, and particularly relates to ecological environment-friendly bio-based TPU furniture leather and a preparation method thereof.
Background
With the continuous advancement of sustainable economy, the country is increasingly paying attention to environmental protection and recycling of resources, and the use of non-renewable resources such as petroleum by using bio-based materials is becoming a trend. The bio-based material has good characteristics of green, low carbon, environmental friendliness, reproducibility and biodegradability.
The TPU thermoplastic polyurethane elastomer is an environment-friendly high polymer material with excellent performance, and the film material prepared from the TPU thermoplastic polyurethane has excellent wear resistance, oil resistance, low temperature resistance, hydrolysis resistance, corrosion resistance, and better elasticity and strength. When used as a furniture cloth base film, the film has the characteristics of no toxicity, no formaldehyde, low volatility, no heavy metal, no plasticizer, no sulfide and the like. The present invention has been made in view of this object.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the ecological environment-friendly bio-based TPU furniture leather and the preparation method thereof, the preparation process is simple, the produced bio-based TPU furniture leather is environment-friendly, the material sources are renewable, and the requirements of sustainable development are met.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides ecological environment-friendly bio-based TPU furniture leather which comprises a surface layer, a foaming layer and a bottom cloth layer which are sequentially attached from outside to inside,
the surface layer is prepared from the following components in parts by weight: 100 parts of waterborne polyurethane, 1-10 parts of cross-linking agent, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-10 parts of waterborne flame retardant, 0.1-5 parts of ultraviolet resistant additive and 0-10 parts of color paste;
the surface layer is prepared from the following components in parts by weight: 100 parts of surface layer TPU particles, 5-40 parts of filler, 1-30 parts of halogen-free flame retardant, 0.1-10 parts of ultraviolet resistant additive, 0.1-10 parts of organosilicon wear-resistant handfeel agent and 0-10 parts of color master batch;
the foaming layer is prepared from the following components in parts by weight: 50-100 parts of foaming layer TPU particles, 0-30 parts of filler and 0.01-5 parts of foaming agent.
In the technical scheme, the base fabric layer is a non-woven fabric base fabric, and the non-woven fabric base fabric is formed by mixing and processing biological fibers and biological Polyester (PTT) fibers;
the non-woven fabric base cloth is subjected to flame-retardant and antibacterial treatment after being manufactured, and the specific process is as follows: and (3) dipping the non-woven fabric base cloth into the flame-retardant antibacterial resin slurry, taking out, rolling to dry, repeating the steps twice, and drying and shaping to obtain the non-woven fabric base cloth coated with the water-based flame-retardant antibacterial resin.
In the technical scheme, the thickness of the non-woven fabric base cloth coated with the water-based flame-retardant antibacterial resin is more than 1.5mm, and the rolling allowance is 10-300%.
In the technical scheme, the surface layer TPU particles are aliphatic polyether TPU with 30-70wt% of biological base content and 60-100A of Shore hardness;
the foaming layer TPU particles are bio-based TPU with the bio-based content of 40-70% and the Shore hardness of 60-90A;
the defoaming agent is an organosilicon defoaming agent;
the cross-linking agent is a water-dispersible polyisocyanate cross-linking agent;
the leveling agent is an organosilicon modified polyether type water-based leveling agent.
The invention also provides a preparation method of the ecological environment-friendly bio-based TPU furniture leather, which comprises the following steps:
uniformly mixing the TPU particles, the filler and the foaming agent of the foaming layer in a single screw extruder, carrying out melt extrusion at 145-190 ℃, and carrying out roller coating on the base cloth layer to obtain the foaming layer;
step (2), putting the surface layer TPU particles, the filler, the halogen-free flame retardant, the ultraviolet-resistant additive, the organosilicon wear-resistant handfeel agent and the masterbatch into an internal mixer, uniformly mixing, and calendaring at 240 ℃ through a calendar to obtain the surface layer, and laminating and compounding the surface layer with the foaming layer in the step (1);
and (3) uniformly mixing the aqueous polyurethane, the cross-linking agent, the flatting agent, the defoamer, the aqueous flame retardant, the ultraviolet-resistant additive and the color paste to obtain aqueous PU slurry, coating the aqueous PU slurry on the surface layer in the step (2), and drying at 150 ℃ to form the surface layer to obtain the TPU furniture leather.
In the technical scheme, the method further comprises a step (4), and the TPU furniture leather prepared in the step (3) is subjected to post-treatment of printing, embossing or pattern suction to obtain a textured product.
In the technical scheme, the thickness of the surface layer is 0.01-0.1mm, the thickness of the surface layer is 0.1-2mm, and the thickness of the foaming layer is 0.5-5mm.
In the above technical scheme, in the step (3), the coating thickness of the aqueous PU slurry is controlled to be about 0.1mm, and the ventilation effect of the TPU furniture leather is controlled by controlling the coating thickness.
In the above technical solution, the foamed layer TPU particles in step (1) and the surface layer TPU particles in step (2) are subjected to a dehumidification drying treatment before being mixed with other components, so that the water content thereof is
And (2) after being mixed with other components, the mixture is dried at the temperature of 80-120 ℃ for 1-3 hours, so that the surface of furniture leather can be prevented from foaming, and quality problems are caused.
In the technical scheme, the TPU furniture leather prepared in the step (3) is annealed at 80-110 ℃ for 24h for shaping.
The invention has the beneficial effects that:
1. the base fabric layer of the bio-based TPU furniture leather disclosed by the invention is made of bio-based renewable materials, the foaming layer and the surface layer are free of solvent in the whole process, only the surface layer adopts aqueous polyurethane, solvent water is used, and the base fabric is a bio-based non-woven fabric, so that the bio-based TPU furniture leather is an environment-friendly product meeting sustainable development.
2. The preparation of the bio-based TPU furniture leather is carried out from bottom to top, the foaming layer is prepared by an extrusion process and coated on the base cloth, the surface layer is prepared by a calendaring process and is compositely pressed on the foaming layer, and finally, the surface treatment is directly carried out on the surface layer, so that the preparation process is simple.
3. The base fabric layer takes biological fibers, plants and the like as raw materials, and the material sources are renewable and meet the requirement of sustainable development.
4. The invention does not use plasticizer in the production process, and can be recycled through physical and chemical thermal cracking, catalytic cracking and the like.
5. The ventilation effect of the surface layer of the bio-based TPU furniture leather is controlled by controlling the coating thickness, the pressing composite pressure of the calendaring film and the foaming layer is controlled to be 0.8-1.5MPa, and the structure of the foam holes is influenced if the pressure is too large.
Detailed Description
The invention will be further described with reference to specific examples for better illustrating the objects, technical solutions and advantages of the invention. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims.
The invention provides ecological environment-friendly bio-based TPU furniture leather which comprises a surface layer, a foaming layer and a bottom cloth layer which are sequentially attached from outside to inside, wherein the surface layer, the surface layer and the foaming layer are shown in the following table 1 in parts by weight.
TABLE 1 surface layer, foam layer composition Table
Wherein the surface layer TPU particles are aliphatic and polyether type TPU with 30-70% of bio-based content and 60-100A of Shore hardness. The physical properties of the surface layer are high, and the TPU particles of the surface layer and the auxiliary agent cooperate to achieve high physical properties.
The foaming layer TPU particles are a bio-based TPU with the bio-based content of 40-70 percent and the Shore hardness of 60-90A,for example:ECO 12T85. The foamed layer needs to take into account its bondability, so such TPU is selected.
The filler is one or more than two of extinction powder, aluminum hydroxide, aluminum oxide, magnesium hydroxide, zinc borate, aluminum silicate, magnesium carbonate, glass beads, white carbon black, organic silicon resin micropowder, silicon dioxide, calcium carbonate or magnesium oxide.
The defoamer is a silicone defoamer, for example: BYK-023, BYK-055, BYK-077, BYK-072, SC 129, etc.
The crosslinking agent is a water-dispersible polyisocyanate crosslinking agent.
The leveling agent is an organosilicon modified polyether type water-based leveling agent, such as: BYK-346, BYK-348, etc.
The halogen-free flame retardant can be selected from flame retardants such as FR-813 and the like, and is slightly soluble or insoluble in water.
The aqueous flame retardant can be selected from MT-2153 and the like, and is easy to stir and disperse.
The ultraviolet resistant additive can be UV-431, 329, 531, etc.
The organosilicon wear-resistant handfeel agent can be selected from organosilicon wear-resistant handfeel agents such as Silok 51H, C-4801 and the like.
The color paste is a bio-based color paste prepared from nonionic bio-based polyether dispersant DP220 and the like.
The color master batch is a bio-based degradable PBAT color master batch, can be added in a surface layer or a foaming layer, and the dosage is determined according to the thickness of the product, the coloring strength of the pigment and the required chromaticity.
The aqueous polyurethane is a polyether type aqueous polyurethane resin with the aliphatic solid content of 30-40%.
The foaming agent can be TPU foaming agent such as Y-230D, HYDROCEROL.
In addition, the base fabric layer is non-woven fabric base fabric, is formed by mixing and processing biological fibers and biological Polyester (PTT) fibers, and has renewable raw material sources. The biological fiber is extracted from trees, hemp, coconut shells, bamboo, casein, silk and the like; the bio-based Polyester (PTT) fiber is prepared by taking green plants as raw materials and performing microbial fermentation and spinning.
Impregnating the base fabric: the non-woven fabric base cloth is subjected to flame-retardant and antibacterial treatment, and the specific process is as follows: and (3) immersing the non-woven fabric base cloth in the flame-retardant antibacterial resin slurry, taking out, rolling to dry, repeating twice, and drying and shaping to obtain the non-woven fabric base cloth coated with the water-based flame-retardant antibacterial resin, wherein the thickness of the non-woven fabric base cloth is more than 1.5mm, and the rolling residual rate is controlled to be 10-300%.
The flame retardant in the flame-retardant antibacterial resin slurry is a bio-based intumescent flame retardant, the resin is bio-based waterborne polyurethane modified resin, and a certain amount of bio-based mildew-proof antibacterial agent is added into the slurry. The bio-based aqueous polyurethane modified resin is bio-based isocyanate and is prepared by polycondensation reaction of bio-based polyol and silicon-containing modified polyether polyol.
The bio-based intumescent flame retardant can be lignin, starch, cellulose, chitosan, cyclodextrin and other bio-based char forming agents.
The raw materials of the bio-based mildew-proof antibacterial agent are chitosan, nisin, cinnamon essential oil, clove essential oil, citric acid, epsilon-polylysine, lysozyme and the like.
The invention also provides a preparation method of the ecological environment-friendly bio-based TPU furniture leather, which comprises the following steps:
and (1) preparing a base fabric layer, and preparing the base fabric layer according to the method.
And (2) uniformly mixing TPU particles, filler and foaming agent in a single screw extruder, carrying out melt extrusion at 145-190 ℃, and carrying out roller coating on the bottom coating layer to obtain the foaming layer. The thickness range is 0.5-5mm.
And (3) putting TPU particles, a filler, a halogen-free flame retardant, a light-resistant and ultraviolet-resistant additive, an organosilicon wear-resistant handfeel agent and masterbatch into an internal mixer, uniformly mixing, calendaring at 240 ℃ through a calendar to obtain a surface layer with the thickness range of 0.1-2mm, and laminating and compounding the surface layer with the foaming layer in the step (2).
And (4) uniformly mixing the aqueous polyurethane, the cross-linking agent, the flatting agent, the defoamer, the aqueous flame retardant, the ultraviolet-resistant additive and the color paste to obtain aqueous PU slurry, uniformly mixing the aqueous PU slurry, coating the aqueous PU slurry on a surface layer of the synthetic leather, controlling the thickness to be about 0.1mm, and drying at 150 ℃ to form a surface layer.
And (5) carrying out post-treatment such as printing, embossing or pattern suction on the bio-based TPU furniture leather to obtain a plump textured product.
And (6) carrying out physical property test on the prepared bio-based TPU furniture leather to evaluate whether the product requirement is met.
The bio-based TPU furniture leather is prepared by the preparation method of the invention, and the finished product is subjected to performance test, and the test results are shown in Table 2.
Table 2 results of bio-based TPU furniture leather performance test
Test item Test results
Folding endurance More than or equal to 50000 times
Wear resistance Not less than 1000 turns
Tear load ≥20
Stain resistant No oil shrinkage, dry cloth wiping and no trace
Hydrolysis resistance Preferably, it is
Tensile load N-3cm ≥250
Peel load N/3cm ≥100
UV/ultraviolet resistance Grade 3 or more
Flame retardancy ≤100mm/min
VOC Single substance<1ug/m 3 Total content of<5ug/m 3
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. Ecological environment-friendly bio-based TPU furniture leather comprises a surface layer, a foaming layer and a bottom cloth layer which are sequentially attached from outside to inside, and is characterized in that:
the surface layer is prepared from the following components in parts by weight: 100 parts of waterborne polyurethane, 1-10 parts of cross-linking agent, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-10 parts of waterborne flame retardant, 0.1-5 parts of ultraviolet resistant additive and 0-10 parts of color paste;
the surface layer is prepared from the following components in parts by weight: 100 parts of surface layer TPU particles, 5-40 parts of filler, 1-30 parts of halogen-free flame retardant, 0.1-10 parts of ultraviolet resistant additive, 0.1-10 parts of organosilicon wear-resistant handfeel agent and 0-10 parts of color master batch;
the foaming layer is prepared from the following components in parts by weight: 50-100 parts of foaming layer TPU particles, 0-30 parts of filler and 0.01-5 parts of foaming agent.
2. The TPU furniture leather according to claim 1, characterized by: the base fabric layer is a non-woven fabric base fabric, and the non-woven fabric base fabric is formed by mixing and processing biological fibers and PTT fibers;
the non-woven fabric base cloth is subjected to flame-retardant and antibacterial treatment after being manufactured, and the specific process is as follows: and (3) dipping the non-woven fabric base cloth into the flame-retardant antibacterial resin slurry, taking out, rolling to dry, repeating the steps twice, and drying and shaping to obtain the non-woven fabric base cloth coated with the water-based flame-retardant antibacterial resin.
3. The TPU furniture leather according to claim 2, characterized by: the thickness of the non-woven fabric base cloth coated with the water-based flame-retardant antibacterial resin is more than 1.5mm, and the rolling surplus rate is 10-300%.
4. The TPU furniture leather according to claim 1, characterized by: the surface layer TPU particles are aliphatic polyether type TPU with 30-70wt% of bio-based content and 60-100A of Shore hardness;
the foaming layer TPU particles are bio-based TPU with the bio-based content of 40-70% and the Shore hardness of 60-90A;
the defoaming agent is an organosilicon defoaming agent;
the cross-linking agent is a water-dispersible polyisocyanate cross-linking agent;
the leveling agent is an organosilicon modified polyether type water-based leveling agent.
5. A process for the preparation of TPU furniture leather as defined in any one of claims 1 to 4, characterized in that: the method comprises the following steps:
uniformly mixing the TPU particles, the filler and the foaming agent of the foaming layer in a single screw extruder, carrying out melt extrusion at 145-190 ℃, and carrying out roller coating on the base cloth layer to obtain the foaming layer;
step (2), putting the surface layer TPU particles, the filler, the halogen-free flame retardant, the ultraviolet-resistant additive, the organosilicon wear-resistant handfeel agent and the masterbatch into an internal mixer, uniformly mixing, and calendaring at 240 ℃ through a calendar to obtain the surface layer, and laminating and compounding the surface layer with the foaming layer in the step (1);
and (3) uniformly mixing the aqueous polyurethane, the cross-linking agent, the flatting agent, the defoamer, the aqueous flame retardant, the ultraviolet-resistant additive and the color paste to obtain aqueous PU slurry, coating the aqueous PU slurry on the surface layer in the step (2), and drying at 150 ℃ to form the surface layer to obtain the TPU furniture leather.
6. The method of manufacturing according to claim 5, wherein: the method further comprises a step (4) of carrying out post-treatment of printing, embossing or pattern suction on the TPU furniture leather prepared in the step (3) to obtain a product with patterns.
7. The method of manufacturing according to claim 5, wherein: the thickness of the surface layer is 0.01-0.1mm, the thickness of the surface layer is 0.1-2mm, and the thickness of the foaming layer is 0.5-5mm.
8. The method of manufacturing according to claim 5, wherein: in the step (3), the coating thickness of the aqueous PU slurry is controlled to be about 0.1mm, and the ventilation effect of the TPU furniture leather is controlled by controlling the coating thickness.
9. The method of manufacturing according to claim 5, wherein: the TPU granules of the foaming layer in the step (1) and the TPU granules of the surface layer in the step (2) are subjected to dehumidification drying treatment before being mixed with other components, so that the water content of the TPU granules is less than 0.05%, and are subjected to drying treatment after being mixed with other components, wherein the temperature is 80-120 ℃ and the time is 1-3h.
10. The method of manufacturing according to claim 5, wherein: and (3) annealing the TPU furniture leather prepared in the step (3) at 80-110 ℃ for 24h for shaping.
CN202311071596.XA 2023-08-24 2023-08-24 Ecological environment-friendly bio-based TPU furniture leather and preparation method thereof Pending CN117071297A (en)

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