CN116676788A - Preparation method of bio-based synthetic leather capable of absorbing lines - Google Patents
Preparation method of bio-based synthetic leather capable of absorbing lines Download PDFInfo
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- CN116676788A CN116676788A CN202310686651.XA CN202310686651A CN116676788A CN 116676788 A CN116676788 A CN 116676788A CN 202310686651 A CN202310686651 A CN 202310686651A CN 116676788 A CN116676788 A CN 116676788A
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002002 slurry Substances 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 49
- 239000010410 layer Substances 0.000 claims abstract description 40
- 238000001035 drying Methods 0.000 claims abstract description 39
- 239000004744 fabric Substances 0.000 claims abstract description 27
- 239000002344 surface layer Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000011265 semifinished product Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000010985 leather Substances 0.000 claims abstract description 11
- 235000007119 Ananas comosus Nutrition 0.000 claims abstract description 8
- 238000005485 electric heating Methods 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 244000099147 Ananas comosus Species 0.000 claims abstract 2
- 238000003756 stirring Methods 0.000 claims description 51
- 239000003795 chemical substances by application Substances 0.000 claims description 47
- 239000002562 thickening agent Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 230000000630 rising effect Effects 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 238000007790 scraping Methods 0.000 claims description 9
- 229920006025 bioresin Polymers 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 7
- 210000004207 dermis Anatomy 0.000 abstract description 2
- 239000012752 auxiliary agent Substances 0.000 description 9
- 241000234671 Ananas Species 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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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
- D06N3/007—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
- D06N3/0079—Suction, vacuum treatment
-
- 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
-
- 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
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
-
- 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
- D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
- D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
-
- 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
- D06N2201/00—Chemical constitution of the fibres, threads or yarns
- D06N2201/04—Vegetal fibres
- D06N2201/042—Cellulose fibres, e.g. cotton
- D06N2201/045—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
-
- 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
- D06N2213/00—Others characteristics
- D06N2213/03—Fibrous web coated on one side with at least two layers of the same polymer type, e.g. two coatings of polyolefin
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to a preparation method of bio-based synthetic leather capable of absorbing lines, which comprises the steps of selecting base cloth containing pineapple fibers, coating wet-process water-based bio-based slurry on the base cloth, drying and forming the base cloth through a drying oven to obtain water-based bio-based bass, selecting flat release paper, coating prepared dry-process water-based surface layer slurry on the release paper, coating prepared dry-process water-based middle layer slurry on a dried surface layer film, coating prepared dry-process water-based bottom layer slurry on the dried middle layer film, bonding the water-based bio-based bass on the dry-process water-based bottom layer through a bonding wheel, and drying and curing the dry-process water-based surface layer slurry through a third drying oven; stripping the release paper from the synthetic leather to obtain a water-based bio-based synthetic leather semi-finished product; preheating a synthetic leather semi-finished product through a baking oven; baking the surface of the leather by an electric heating tube heating cover to soften the surface of the water-based bio-based synthetic leather, immediately adsorbing the surface with a vacuum wheel, demolding and cooling; the wheel is used for sucking flowers to form patterns, so that the product has adjustable grain depth, full hand feeling and strong dermis feel.
Description
Technical Field
The invention relates to the field of synthetic leather, in particular to a preparation method of bio-based synthetic leather capable of absorbing lines.
Background
In the artificial leather industry, the existing common bio-based artificial leather is generally manufactured by taking release paper as a mold, coating a bio-based material on the release paper, drying the release paper to form a film, and then attaching and processing a bio-based fabric with a bio-based surface layer film through an adhesive. The products produced by this process have several disadvantages: 1. the production process of the release paper and the dry process veneering process of the release paper are influenced, patterns with deeper lines and thicker crazy cannot be produced, and the patterns of the product are single; 2. the biological base coating cannot be too thick under the influence of the dry process, so that the product has insufficient handfeel and weak leather feel.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a preparation method of a bio-based synthetic leather capable of absorbing patterns, which can absorb patterns through a wheel, and the product has adjustable pattern depth, full hand feeling and strong dermis feel.
The invention solves the technical problems by adopting the technical scheme that: the preparation method of the bio-based synthetic leather capable of absorbing lines comprises the following steps:
step one: selection of a bio-based fabric:
the biological base cloth is selected from the base cloth containing pineapple fibers; the toughness of the base cloth containing the pineapple fiber is stronger than that of the traditional cotton fiber, the fabric is stiff and smooth and is not wrinkled, the hand feeling is soft and thin, the surface of the pineapple fiber is very rough, and longitudinal gaps and holes are formed, so that the base cloth can be better coated with a biological base, the whole adhesion is firm, and printing can be better carried out;
step two: preparing wet aqueous bio-based slurry: calculated by weight parts
Mixing 100 parts of water-based bio-based resin and 5-10 parts of bio-based filler, stirring at a low speed by using a dispersing machine, and sequentially adding 0.3-0.5 part of dispersing agent, 0.5-1 part of anti-cracking agent, 1-3 parts of thickening agent, 2-5 parts of foam stabilizer and 0.2-0.5 part of curing agent while stirring; the addition of the auxiliary agents in sequence can ensure that each auxiliary agent has enough mixing time, so that the mixing is more uniform and the mixing effect is better;
step three, producing the wet-process water-based bio-based bass by weight parts
Coating the slurry prepared in the second step on a selected bio-base fabric by using a direct coating production line, and drying and forming by using an oven to obtain a water-based bio-base bass; the water-based bio-based bass has good folding resistance, higher stripping performance and excellent environmental protection performance;
step four: preparing dry aqueous surface layer slurry: calculated by weight parts
100 parts of aqueous dry resin are stirred by a dispersing machine, and are added in sequence while stirring: 0.8-1.5 parts of leveling agent, 1-2 parts of handfeel agent, 0.8-1.5 parts of thickening agent, 0.5-0.8 part of curing agent and 3-10 parts of water-based color paste;
step five: preparing dry aqueous middle-layer slurry: calculated by weight parts
Stirring 100 parts of aqueous dry resin by using a dispersing machine, and sequentially adding 0.5-1 part of flatting agent, 1-2 parts of thickening agent, 0.2-0.5 part of curing agent and 3-8 parts of aqueous color paste while stirring;
step six: preparing dry aqueous bottom layer slurry: calculated by weight parts
Stirring 100 parts of water-based dry primer resin by using a dispersing machine, and sequentially adding 0.3-0.8 part of flatting agent, 1-3 parts of thickening agent and 3-6 parts of curing agent while stirring;
step seven: dry aqueous bio-based overlay production:
using a dry line to produce, selecting a flat release paper, coating the dry aqueous surface layer slurry prepared in the fourth step on the release paper, and drying the release paper through a first oven to form a film; coating and scraping the dry aqueous middle-layer slurry prepared in the step five on the dried surface-layer coating film, and drying the surface-layer coating film through a second oven to form a film; coating the dry aqueous bottom layer slurry prepared in the step six on the dried middle layer coating film, bonding the aqueous bio-base prepared in the step three on the dry aqueous bottom layer through a bonding wheel, and drying and curing through a third drying oven; stripping the release paper from the synthetic leather to obtain a water-based bio-based synthetic leather semi-finished product;
step eight: processing the rear section suction lines:
selecting a proper vacuum wheel on a rear-stage vacuum grain sucking machine for further processing the water-based bio-based synthetic leather semi-finished product prepared in the step seven; preheating a synthetic leather semi-finished product through a baking oven; and then baking the surface of the leather by an electric heating tube heating cover, so that the water-based bio-based synthetic leather surface is immediately adsorbed with a vacuum wheel after being softened, and the leather surface can present the texture of the used wheel after demoulding and cooling, thus the water-based bio-based synthetic leather with three-dimensional texture and full hand feeling is prepared.
In order to further improve, the rotating speed in the second step is controlled to be 300-700rpm, the stirring time is 60-90 minutes, and the viscosity is controlled to be 8000-10000cps.
Further perfecting, in the third step, the slurry prepared in the second step is coated on a selected bio-based substrate by a direct coating production line, and the feeding amount is controlled to be 500-800g/m.
Further perfecting, controlling the temperature of the oven in the third step to be 100-170 ℃, and heating in a gradient rising mode.
Further perfecting, controlling the rotation speed of the dispersing machine in the fourth step at 200-500rpm, stirring for 30-60 minutes, and controlling the viscosity at 3000-5000cps.
Further perfecting, controlling the rotating speed of the dispersing machine in the fifth step at 300-800rpm, stirring for 50-80 minutes, and controlling the viscosity at 4000-6000cps.
Further perfecting, controlling the rotating speed of the dispersing machine in the step six at 500-900rpm, stirring for 30-40 minutes, and controlling the viscosity at 10000-15000cps.
Further perfecting, wherein in the step seven, when the dry aqueous surface layer slurry prepared in the step four is coated on release paper, the feeding amount is controlled to be 80-100g/m; the temperature of the first oven is controlled to be 90-130 ℃ when the first oven is dried to form a film, and the temperature is raised in a gradient rising mode; when the dry aqueous middle layer sizing agent prepared in the step five is coated and scraped on the dried surface layer coating, the feeding amount is controlled to be 110-130g/m; the temperature of the second oven is controlled to be 90-140 ℃ when the second oven is dried to form a film, and the temperature is raised in a gradient rising mode; when the dry aqueous bottom layer slurry prepared in the step six is coated and scraped on the dried middle layer leather film, the feeding amount is controlled to be 100-120g/m; the temperature of the third oven is controlled between 110 ℃ and 140 ℃ during drying and solidification, and the temperature is raised in a gradient rising mode.
Further perfecting, controlling the preheating temperature of the oven in the step eight to be 150-170 ℃ and heating in a gradient rising mode; the temperature of the electric heating tube heating cover is controlled to be 180-210 ℃ when the surface is baked, the water-based bio-based synthetic leather surface is immediately adsorbed on a vacuum wheel after being softened, and the vacuum degree is controlled to be-0.05-0.07 Mpa.
The beneficial effects of the invention are as follows: the texture of the prepared synthetic leather is three-dimensional and full in hand feeling, so that the skin feel and the meat feel are good, the texture depth of the existing synthetic leather is only 0-0.05mm, the texture can be formed by sucking flowers through wheels, the depth of the printing texture can be 0.1-0.3mm, the texture depth of the product is adjustable, the physical property is good, and the synthetic leather is similar to that of natural leather, and meanwhile, the synthetic leather is more environment-friendly.
Detailed Description
The invention is further described below:
example 1
A preparation method of a bio-based synthetic leather capable of absorbing lines comprises the following steps:
1. selection of a bio-based fabric:
the biological base cloth is selected from the base cloth containing pineapple fibers;
2. preparing wet aqueous bio-based slurry:
100 parts of water-based bio-based resin, 5 parts of bio-based filler, 0.3 part of dispersing agent, 0.5 part of anti-cracking agent, 1 part of thickening agent, 2 parts of foam stabilizer and 0.2 part of curing agent; stirring at low speed with a dispersing machine, controlling the rotating speed at 300rpm, sequentially adding all auxiliary agents while stirring, stirring for 60 minutes, and setting the viscosity at 8000cps;
3. production of wet aqueous bio-based bass:
coating the prepared slurry on a selected bio-base fabric by using a direct coating production line, controlling the feeding amount to be 500g/m, drying and forming by using an oven to obtain a water-based bio-base, and controlling the temperature to be 100 ℃ and rising in a gradient manner;
4. preparing dry aqueous surface layer slurry:
100 parts of aqueous dry resin, 0.8 part of flatting agent, 1 part of handfeel agent, 0.8 part of thickening agent, 0.5 part of curing agent and 3 parts of aqueous color paste; stirring with a dispersing machine at 200rpm, sequentially adding all additives while stirring for 30 min, and controlling viscosity to 3000cps;
5. preparing dry aqueous middle-layer slurry:
100 parts of aqueous dry resin, 0.5 part of flatting agent, 1 part of thickening agent, 0.2 part of curing agent and 3 parts of aqueous color paste; stirring with a dispersing machine, controlling the rotating speed at 300rpm, sequentially adding all auxiliary agents while stirring for 50 minutes, and controlling the viscosity at 4000cps;
6. preparing dry aqueous bottom layer slurry:
100 parts of water-based dry primer resin, 0.3 part of flatting agent, 1 part of thickening agent and 3 parts of curing agent; stirring with a dispersing machine at 500rpm, sequentially adding all additives while stirring for 30 min, and viscosity 10000cps;
7. dry aqueous bio-based overlay production:
using a dry line to produce, selecting a flat release paper, coating and scraping the dry aqueous surface layer slurry prepared in the fourth step on the release paper, controlling the feeding amount to be 80g/m, drying the release paper through a first oven to form a film, and raising the temperature to 90 ℃ in a gradient manner; coating and scraping the dry aqueous middle-layer slurry prepared in the step five on the dried surface coating, controlling the feeding amount to be 110g/m, drying the surface coating by a second oven to form a film, and raising the temperature to 90 ℃ in a gradient manner; coating the dry aqueous bottom layer slurry prepared in the step six on the dried middle layer coating, controlling the feeding amount to be 100g/m, bonding the prepared aqueous bio-base on the dry aqueous bottom layer through a bonding wheel, drying and curing through a third drying oven, and raising the temperature to 110 ℃ in a gradient manner; stripping the release paper from the synthetic leather to obtain a water-based bio-based synthetic leather semi-finished product;
8. processing the rear section suction lines:
the water-based bio-based synthetic leather semi-finished product prepared in the step seven is further processed by selecting a vacuum wheel with the grain depth of 0.1mm on a rear-stage vacuum grain sucking machine; preheating a semi-finished product of the synthetic leather through an oven, and controlling the temperature to be 150 ℃ and rising in a gradient manner; and then baking the surface by an electric heating tube heating cover, controlling the temperature at 180 ℃, enabling the water-based bio-based synthetic leather surface to be immediately adsorbed with a vacuum wheel after softening, controlling the vacuum degree at-0.05 Mpa, and enabling the leather surface to present the texture of the used wheel after demoulding and cooling to prepare the water-based bio-based synthetic leather with three-dimensional texture and full hand feeling.
Example 2
A preparation method of a bio-based synthetic leather capable of absorbing lines comprises the following steps:
1. selection of a bio-based fabric:
the biological base cloth is selected from the base cloth containing pineapple fibers;
2. preparing wet aqueous bio-based slurry:
100 parts of water-based bio-based resin, 7 parts of bio-based filler, 0.4 part of dispersing agent, 0.7 part of anti-cracking agent, 2 parts of thickening agent, 3 parts of foam stabilizer and 0.3 part of curing agent; stirring at low speed with a dispersing machine, controlling the rotating speed at 500rpm, sequentially adding all auxiliary agents while stirring, and stirring for 75 minutes, wherein the viscosity is 9000cps;
3. production of wet aqueous bio-based bass:
coating the prepared slurry on a selected bio-base fabric by using a direct coating production line, controlling the feeding amount to be 650g/m, drying and forming by using an oven to obtain a water-based bio-base, and controlling the temperature to be 135 ℃ and rising in a gradient manner;
4. preparing dry aqueous surface layer slurry:
100 parts of aqueous dry resin, 1.1 parts of flatting agent, 1.5 parts of handfeel agent, 1.1 parts of thickener, 0.6 part of curing agent and 6 parts of aqueous color paste; stirring with a dispersing machine, controlling the rotating speed at 350rpm, sequentially adding all auxiliary agents while stirring, stirring for 45 minutes, and controlling the viscosity at 4000cps;
5. preparing dry aqueous middle-layer slurry:
100 parts of aqueous dry resin, 0.7 part of flatting agent, 1.5 parts of thickening agent, 0.3 part of curing agent and 5 parts of aqueous color paste; stirring with a dispersing machine, controlling the rotating speed at 550rpm, sequentially adding all auxiliary agents while stirring, and stirring for 65 minutes, wherein the viscosity is 5000cps;
6. preparing dry aqueous bottom layer slurry:
100 parts of water-based dry primer resin, 0.5 part of flatting agent, 2 parts of thickening agent and 4 parts of curing agent; stirring with a dispersing machine at 700rpm, sequentially adding all additives while stirring for 35 min, and viscosity of 12000cps;
7. dry aqueous bio-based overlay production:
using a dry line to produce, selecting a flat release paper, coating and scraping the dry aqueous surface layer slurry prepared in the fourth step on the release paper, controlling the feeding amount to be 90g/m, drying the release paper through a first oven to form a film, and raising the temperature to 110 ℃ in a gradient manner; coating and scraping the dry aqueous middle-layer slurry prepared in the step five on the dried surface coating, controlling the feeding amount to be 120g/m, drying the surface coating by a second oven to form a film, and raising the temperature to 115 ℃ in a gradient manner; coating the dry aqueous bottom layer slurry prepared in the step six on the dried middle layer coating, controlling the feeding amount to be 110g/m, bonding the prepared aqueous bio-base on the dry aqueous bottom layer through a bonding wheel, drying and curing through a third drying oven, and raising the temperature to 125 ℃ in a gradient manner; stripping the release paper from the synthetic leather to obtain a water-based bio-based synthetic leather semi-finished product;
8. processing the rear section suction lines:
the water-based bio-based synthetic leather semi-finished product prepared in the step seven is further processed by selecting a vacuum wheel with the grain depth of 0.15mm on a rear-stage vacuum grain sucking machine; preheating a synthetic leather semi-finished product through an oven, and controlling the temperature to be 160 ℃ and rising in a gradient manner; and then baking the surface by an electric heating tube heating cover, wherein the temperature is controlled at 195 ℃, the surface of the water-based bio-based synthetic leather is immediately adsorbed by a vacuum wheel after being softened, the vacuum degree is controlled at 0.06Mpa, and the surface of the leather can present the texture of the used wheel after demoulding and cooling, so that the water-based bio-based synthetic leather with three-dimensional texture and full hand feeling is prepared.
Example 3
A preparation method of a bio-based synthetic leather capable of absorbing lines comprises the following steps:
1. selection of a bio-based fabric:
the biological base cloth is selected from the base cloth containing pineapple fibers;
2. preparing wet aqueous bio-based slurry:
100 parts of water-based bio-based resin, 10 parts of bio-based filler, 0.5 part of dispersing agent, 1 part of anti-cracking agent, 3 parts of thickening agent, 5 parts of foam stabilizer and 0.5 part of curing agent; stirring at low speed with a dispersing machine, controlling the rotating speed at 300-700rpm, sequentially adding all auxiliary agents while stirring, stirring for 90 minutes, and controlling the viscosity at 10000cps;
3. production of wet aqueous bio-based bass:
coating the prepared slurry on a selected bio-base fabric by using a direct coating production line, controlling the feeding amount to be 800g/m, drying and forming by using an oven to obtain a water-based bio-base, and controlling the temperature to be 170 ℃ and rising in a gradient manner;
4. preparing dry aqueous surface layer slurry:
100 parts of aqueous dry resin, 1.5 parts of flatting agent, 2 parts of handfeel agent, 1.5 parts of thickening agent, 0.8 part of curing agent and 10 parts of aqueous color paste; stirring with a dispersing machine at 500rpm, sequentially adding all additives while stirring for 60 min, and viscosity of 5000cps;
5. preparing dry aqueous middle-layer slurry:
100 parts of aqueous dry resin, 1 part of flatting agent, 2 parts of thickening agent, 0.5 part of curing agent and 8 parts of aqueous color paste; stirring with a dispersing machine at 800rpm, sequentially adding all additives while stirring for 80 min, and controlling viscosity to 6000cps;
6. preparing dry aqueous bottom layer slurry:
100 parts of water-based dry primer resin, 0.8 part of flatting agent, 3 parts of thickening agent and 6 parts of curing agent; stirring with a dispersing machine, controlling the rotating speed at 900rpm, sequentially adding all auxiliary agents while stirring, stirring for 40 minutes, and controlling the viscosity at 15000cps;
7. dry aqueous bio-based overlay production:
using a dry line to produce, selecting a flat release paper, coating and scraping the dry aqueous surface layer slurry prepared in the fourth step on the release paper, controlling the feeding amount to be 100g/m, drying the release paper through a first oven to form a film, and raising the temperature to 130 ℃ in a gradient manner; coating and scraping the dry aqueous middle-layer slurry prepared in the step five on the dried surface coating, controlling the feeding amount to be 130g/m, drying the surface coating by a second oven to form a film, and raising the temperature to 140 ℃ in a gradient manner; coating and scraping the dry aqueous bottom layer slurry prepared in the step six on the dried middle layer coating, controlling the feeding amount to be 120g/m, bonding the aqueous bio-base prepared in advance on the dry aqueous bottom layer through a bonding wheel, drying and curing through a third drying oven, and raising the temperature to 140 ℃ in a gradient manner; stripping the release paper from the synthetic leather to obtain a water-based bio-based synthetic leather semi-finished product;
8. processing the rear section suction lines:
the water-based bio-based synthetic leather semi-finished product prepared in the step seven is further processed by selecting a vacuum wheel with the grain depth of 0.2mm on a rear-stage vacuum grain sucking machine; preheating a semi-finished product of the synthetic leather by an oven, and controlling the temperature to be 170 ℃ and rising in a gradient manner; and then baking the surface by an electric heating tube heating cover, wherein the temperature is controlled at 210 ℃, the water-based bio-based synthetic leather surface is immediately adsorbed by a vacuum wheel after being softened, the vacuum degree is controlled at 0.07Mpa, and the leather surface can present the texture of the used wheel after demoulding and cooling, so that the water-based bio-based synthetic leather with three-dimensional texture and full hand feeling is prepared.
The physical properties are shown in the following table:
the synthetic leather prepared by the preparation method has three-dimensional texture, full hand feeling, adjustable texture depth of the product and good physical property, and can meet the use requirement of the synthetic leather.
While the invention has been described with reference to a preferred embodiment, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the invention.
Claims (7)
1. A preparation method of a bio-based synthetic leather capable of absorbing lines is characterized by comprising the following steps: the method comprises the following steps:
step one: selection of a bio-based fabric:
the biological base cloth is selected from the base cloth containing pineapple fibers;
step two: preparing wet aqueous bio-based slurry:
mixing 100 parts of water-based bio-based resin and 5-10 parts of bio-based filler, stirring at a low speed by using a dispersing machine, and sequentially adding 0.3-0.5 part of dispersing agent, 0.5-1 part of anti-cracking agent, 1-3 parts of thickening agent, 2-5 parts of foam stabilizer and 0.2-0.5 part of curing agent while stirring;
step three, wet-process water-based bio-based bass production:
coating the slurry prepared in the second step on a selected bio-base fabric by using a direct coating production line, and drying and forming by using an oven to obtain a water-based bio-base bass;
step four: preparing dry aqueous surface layer slurry:
100 parts of aqueous dry resin are stirred by a dispersing machine, and are added in sequence while stirring: 0.8-1.5 parts of leveling agent, 1-2 parts of handfeel agent, 0.8-1.5 parts of thickening agent, 0.5-0.8 part of curing agent and 3-10 parts of water-based color paste;
step five: preparing dry aqueous middle-layer slurry:
stirring 100 parts of aqueous dry resin by using a dispersing machine, and sequentially adding 0.5-1 part of flatting agent, 1-2 parts of thickening agent, 0.2-0.5 part of curing agent and 3-8 parts of aqueous color paste while stirring;
step six: preparing dry aqueous bottom layer slurry:
stirring 100 parts of water-based dry primer resin by using a dispersing machine, and sequentially adding 0.3-0.8 part of flatting agent, 1-3 parts of thickening agent and 3-6 parts of curing agent while stirring;
step seven: dry aqueous bio-based overlay production:
using a dry line to produce, selecting a flat release paper, coating the dry aqueous surface layer slurry prepared in the fourth step on the release paper, and drying the release paper through a first oven to form a film; coating and scraping the dry aqueous middle-layer slurry prepared in the step five on the dried surface-layer coating film, and drying the surface-layer coating film through a second oven to form a film; coating the dry aqueous bottom layer slurry prepared in the step six on the dried middle layer coating film, bonding the aqueous bio-base prepared in the step three on the dry aqueous bottom layer through a bonding wheel, and drying and curing through a third drying oven; stripping the release paper from the synthetic leather to obtain a water-based bio-based synthetic leather semi-finished product;
step eight: processing the rear section suction lines:
preheating the water-based bio-based synthetic leather semi-finished product prepared in the step seven through an oven; and then baking the surface of the leather by an electric heating tube heating cover, so that the water-based bio-based synthetic leather surface is immediately adsorbed by a vacuum wheel after being softened, and demolding and cooling are performed.
2. The method for preparing the bio-based synthetic leather capable of absorbing lines according to claim 1, wherein the method comprises the following steps: in the third step, the temperature of the oven is controlled to be 100-170 ℃, and the temperature is raised in a gradient rising mode.
3. The method for preparing the bio-based synthetic leather capable of absorbing lines according to claim 1, wherein the method comprises the following steps: the rotation speed of the dispersing machine in the fourth step is controlled to be 200-500rpm, the stirring time is 30-60 minutes, and the viscosity is 3000-5000cps.
4. The method for preparing the bio-based synthetic leather capable of absorbing lines according to claim 1, wherein the method comprises the following steps: the rotating speed of the dispersing machine in the fifth step is controlled to be 300-800rpm, the stirring time is 50-80 minutes, and the viscosity is 4000-6000cps.
5. The method for preparing the bio-based synthetic leather capable of absorbing lines according to claim 1, wherein the method comprises the following steps: the rotating speed of the dispersing machine in the step six is controlled to be 500-900rpm, the stirring time is 30-40 minutes, and the viscosity is 10000-15000cps.
6. The method for preparing the bio-based synthetic leather capable of absorbing lines according to claim 1, wherein the method comprises the following steps: in the seventh step, when the dry aqueous surface layer slurry prepared in the fourth step is coated and scraped on release paper, the feeding amount is controlled to be 80-100g/m; the temperature of the first oven is controlled to be 90-130 ℃ when the first oven is dried to form a film, and the temperature is raised in a gradient rising mode; when the dry aqueous middle layer sizing agent prepared in the step five is coated and scraped on the dried surface layer coating, the feeding amount is controlled to be 110-130g/m; the temperature of the second oven is controlled to be 90-140 ℃ when the second oven is dried to form a film, and the temperature is raised in a gradient rising mode; when the dry aqueous bottom layer slurry prepared in the step six is coated and scraped on the dried middle layer leather film, the feeding amount is controlled to be 100-120g/m; the temperature of the third oven is controlled between 110 ℃ and 140 ℃ during drying and solidification, and the temperature is raised in a gradient rising mode.
7. The method for preparing the bio-based synthetic leather capable of absorbing lines according to claim 1, wherein the method comprises the following steps: the preheating temperature of the baking oven in the step eight is controlled to be 150-170 ℃, and the heating is carried out in a gradient rising mode; the temperature of the electric heating tube heating cover is controlled to be 180-210 ℃ when the surface is baked, the water-based bio-based synthetic leather surface is immediately adsorbed on a vacuum wheel after being softened, and the vacuum degree is controlled to be-0.05-0.07 Mpa.
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