CN114369961B - Preparation method of recyclable double-sided luggage leather - Google Patents
Preparation method of recyclable double-sided luggage leather Download PDFInfo
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- CN114369961B CN114369961B CN202210061810.2A CN202210061810A CN114369961B CN 114369961 B CN114369961 B CN 114369961B CN 202210061810 A CN202210061810 A CN 202210061810A CN 114369961 B CN114369961 B CN 114369961B
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- 239000010985 leather Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000010410 layer Substances 0.000 claims abstract description 63
- 238000005187 foaming Methods 0.000 claims abstract description 47
- 239000004744 fabric Substances 0.000 claims abstract description 33
- 239000004814 polyurethane Substances 0.000 claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 239000003973 paint Substances 0.000 claims abstract description 18
- 239000002344 surface layer Substances 0.000 claims abstract description 18
- 239000011265 semifinished product Substances 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 14
- 229920002635 polyurethane Polymers 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 8
- 238000013329 compounding Methods 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 44
- 229920005749 polyurethane resin Polymers 0.000 claims description 13
- 239000002562 thickening agent Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 7
- 239000004088 foaming agent Substances 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 21
- 239000002699 waste material Substances 0.000 abstract description 9
- 239000011850 water-based material Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 40
- 238000005299 abrasion Methods 0.000 description 14
- 239000000047 product Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000008199 coating composition Substances 0.000 description 5
- 241000219495 Betulaceae Species 0.000 description 4
- 241000566512 Orthodes Species 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- WDJUZGPOPHTGOT-UHFFFAOYSA-N 3-[3-[5-[5-(4,5-dihydroxy-6-methyloxan-2-yl)oxy-4-hydroxy-6-methyloxan-2-yl]oxy-4-hydroxy-6-methyloxan-2-yl]oxy-14-hydroxy-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2h-furan-5-one Chemical compound C1C(O)C(O)C(C)OC1OC1C(C)OC(OC2C(OC(OC3CC4C(C5C(C6(CCC(C6(C)CC5)C=5COC(=O)C=5)O)CC4)(C)CC3)CC2O)C)CC1O WDJUZGPOPHTGOT-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- 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
- D06N3/14—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 polyurethanes
- D06N3/145—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 polyurethanes two or more layers of polyurethanes
-
- 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
- D06N3/005—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 obtained by blowing or swelling agent
-
- 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
-
- 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
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1685—Wear resistance
-
- 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
-
- 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
Abstract
The application belongs to the technical field of luggage leather, and particularly relates to a preparation method of recyclable double-sided luggage leather, which comprises the following steps: (1) Coating the recyclable base cloth layer with aqueous polyurethane slurry subjected to mechanical foaming, solidifying, washing with water, and drying to obtain an aqueous base foaming layer; (2) Coating water-based paint on release paper, drying to form a water-based surface layer which is attached to the surface of the bass foaming layer, and separating the water-based surface layer from the release paper to obtain a water-based dry PU semi-finished product; (3) And compounding the water-based dry PU semi-finished product with the TPU layer to obtain the recyclable double-sided luggage leather. According to the preparation method of the recyclable double-sided luggage leather, the base foaming layer is prepared on the recyclable base cloth layer, and after the luggage leather is abandoned, the base cloth layer can be reused for manufacturing base cloth or other materials after being recycled, so that resource waste and environmental influence are avoided; the water-based surface layer and the bass foaming layer are both made of water-based materials, so that the environment is protected; and the TPU layer is compounded outside the base cloth layer to obtain double-sided luggage leather, so that the leather has better hand feeling.
Description
Technical Field
The application belongs to the technical field of luggage leather, and particularly relates to a preparation method of recyclable double-sided luggage leather.
Background
Along with the rapid development of the economy in China, the living standard of people is continuously improved, the updating period of products is relatively shortened, the number of waste products with resource waste is rapidly increased, and if the waste products cannot be subjected to harmless treatment, the waste products are directly discarded as waste, so that great pollution is caused to the environment, and the life health of people can be influenced even under the serious condition.
The luggage leather comprises hard luggage leather and soft luggage leather, and the hard luggage leather is smooth and fine in grain surface, good in glossiness and stiff and smooth in leather body, and is mainly used for manufacturing suitcases, traveling cases and the like; soft luggage leather is usually clear in grain surface, soft in leather body, high in fullness and strong in leather feel, and is widely used for making soft bags, handbags and the like. The case and bag that adopts case and bag leather preparation is whole all unable recycle that obtains after abandoning not only is huge extravagant to the resource, also can cause very big influence to the environment.
Therefore, it is necessary to replace part of the materials in the existing luggage leather with recyclable materials, so that the recyclability of the waste luggage leather is improved, and the pollution to the environment is reduced.
Disclosure of Invention
In order to solve the problems, the application discloses a preparation method of recyclable double-sided luggage leather, wherein a base foaming layer is prepared on a recyclable base cloth layer, and after the luggage leather is abandoned, the base cloth layer can be reused for preparing base cloth or other materials after being recycled, so that resource waste and environmental influence are avoided; the water-based surface layer and the bass foaming layer are both made of water-based materials, so that the environment is protected; and the TPU layer is compounded outside the base cloth layer to obtain double-sided luggage leather, so that the leather has good hand feeling.
The application provides a preparation method of recyclable double-sided luggage leather, which adopts the following technical scheme:
the preparation method of the recyclable double-sided luggage leather comprises the following steps:
(1) Coating the recyclable base cloth layer with aqueous polyurethane slurry subjected to mechanical foaming, solidifying, washing with water, and drying to obtain an aqueous base foaming layer;
(2) Coating water-based paint on release paper, drying to form a water-based surface layer which is attached to the surface of the bass foaming layer, and separating the water-based surface layer from the release paper to obtain a water-based dry PU semi-finished product;
(3) And compounding the water-based dry PU semi-finished product with the TPU layer to obtain the recyclable double-sided luggage leather.
The recyclable material is used as the base cloth layer, and the base cloth can be reused for manufacturing the base cloth or other materials after being recycled after the luggage leather is abandoned, so that the resources are saved, and the environment is prevented from being polluted. The base foaming layer and the surface layer are both made of water-based materials, so that no VOC is emitted, and the environment is protected. The TPU layer is compounded on the outer side of the base cloth layer to obtain the double-sided luggage leather, and the double-sided luggage leather has good hand feeling, good sagging feeling and high stiffness.
Preferably, the aqueous foaming material in the step (1) comprises the following components in parts by weight:
100 parts of aqueous polyurethane resin
0-50 parts of filler
4-6 parts of foaming agent
0.1-0.5 part of thickener
0.1 to 0.3 part of leveling agent
0.5-3 parts of color paste.
The filler is added into the aqueous foaming material, so that the cost is reduced, the stiffness of the foaming layer is improved, and the aqueous wet slurry with the viscosity of 13000+/-2000 CPS in winter and 13000+/-1000 CPS in summer can be prepared according to the formula.
Preferably, the filler is one or two of kaolin and calcium carbonate.
Preferably, the water-based paint in the step (2) comprises the following components in parts by weight:
100 parts of aqueous polyurethane resin
0.2 to 0.4 part of leveling agent
0.1 to 0.3 part of defoaming agent
0.5-1 part of thickener
Color paste 5-12 parts
1.5-2.5 parts of wear-resistant agent.
The addition of the wear-resistant agent in the water-based paint is beneficial to increasing the wear resistance of the water-based surface layer and reducing the possibility of scratch and abrasion of the surface layer, and the water-based dry slurry with the winter viscosity of 2000+/-500 CPS and the summer viscosity of 2500+/-500 CPS can be prepared according to the formula.
Preferably, the antiwear agent is a mixture of DY-9238B and HX-7025.
The inventor finds that the mixture of DY-9238B and HX-7025 is used as an anti-wear agent to be added into the water-based paint in the experimental process, and the prepared water-based surface layer has better wear resistance.
Preferably, the mass ratio of DY-9238B to HX-7025 is 1:0.8-1.2.
The inventors found during experiments that the quality of both was better than the abrasion resistance obtained in the above range.
Preferably, the recyclable base fabric layer in the step (1) is one of leather base fabric, knitted fabric, woven fabric and non-woven fabric.
Preferably, the step (1) specifically includes: mechanically foaming the water-based Bayesian foaming material to 1.5-1.7 times of the original volume, coating the foaming material on a recyclable base cloth layer, and performing solidification, water washing and drying at 140-150 ℃ to obtain the water-based Bayesian foaming layer;
the step (2) specifically comprises the following steps: the water-based paint is coated on release paper, is bonded with the surface of the water-based bass foaming layer after being dried at 80-110 ℃, is solidified at 130-140 ℃, and is separated from the release paper to obtain a water-based dry PU semi-finished product.
Preferably, the TPU layer is prepared using WHT-8170RV TPU.
Preferably, the TPU layer is obtained by adhering to a semi-finished product after extrusion through an extruder.
The application has the following beneficial effects:
(1) According to the preparation method of the recyclable double-sided luggage leather, the base foaming layer is prepared on the recyclable base cloth layer, and after the luggage leather is abandoned, the base cloth layer can be reused for manufacturing base cloth or other materials after being recycled, so that resource waste and environmental influence are avoided; the water-based surface layer and the bass foaming layer are both made of water-based materials, so that the environment is protected; and the TPU layer is compounded outside the base cloth layer to obtain double-sided luggage leather, so that the leather has better hand feeling.
(2) The wear-resistant agent is added into the water-based paint for preparing the water-based surface layer to improve the wear resistance of the surface layer, and the inventor finds that the mixture of DY9238B and HX-7025 is used as the wear-resistant agent to be added into the water-based paint, so that the prepared water-based surface layer has better wear resistance.
Drawings
The application will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the structure of the recyclable double-sided luggage leather of the present application;
in the figure: 1. a base cloth layer; 2. a bass foam layer; 3. a water-based top layer; a tpu layer.
Detailed Description
The present application will now be described in further detail with reference to examples.
As shown in fig. 1, the recyclable double-sided luggage leather comprises a TPU layer 4, a base cloth layer 1, a bass foaming layer 2 and a water-based surface layer 3 which are sequentially arranged.
The foaming agent used in each of the examples and comparative examples is a commercially available general polyurethane foaming agent; the thickener is a commercially available general-purpose thickener for aqueous polyurethane resin; the leveling agent is a leveling agent for the commercial general aqueous polyurethane resin; the defoaming agent is a commercially available general-purpose defoaming agent for aqueous polyurethane; the aqueous polyurethane resin in the aqueous foaming material is Huada chemical DG-6115; the water-based paint is prepared from water-based polyurethane which is a mixture of JF-PDY-850H and JF-PDY-846HY of Zhenjiang Huafeng synthetic resin Co., ltd, and the mass ratio of the two is 1:1.
Example 1
The water-based foaming material comprises the following components: 100 parts of aqueous polyurethane resin, 4 parts of foaming agent, 0.1 part of thickener, 0.1 part of flatting agent and 0.5 part of color paste.
The water-based paint comprises the following components: 100 parts of aqueous polyurethane resin, 0.2 part of flatting agent, 0.1 part of defoaming agent, 0.5 part of thickener, 5 parts of color paste and 1.5 parts of wear-resistant agent, wherein the wear-resistant agent is a mixture of DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin), and the mass ratio of the two is 1:0.8.
Preparation of recyclable double-sided luggage leather:
(1) Mechanically foaming the water-based bass foaming material to 1.5-1.7 times of the original volume (injecting a small amount of air at a mixing head to form bubbles in a polymer), coating the water-based bass foaming material on a recyclable base cloth layer (non-woven fabric), and performing solidification, water washing and drying at 140-150 ℃ to obtain a water-based bass foaming layer;
(2) Coating the water-based paint on release paper, drying at 80-110 ℃, attaching the release paper to the surface of the water-based bass foaming layer, curing at 130-140 ℃, and separating the release paper to obtain a water-based dry PU semi-finished product;
(3) And (3) extruding WHT-8170RV TPU particles through a double-screw extruder, and compositing the extruded WHT-8170RV TPU particles with a water-based dry PU semi-finished product to obtain the recyclable double-sided luggage leather.
Example 2
The water-based foaming material comprises the following components: 100 parts of aqueous polyurethane resin, 50 parts of kaolin, 6 parts of foaming agent, 0.5 part of thickener, 0.3 part of flatting agent and 3 parts of color paste.
The water-based paint comprises the following components: 100 parts of aqueous polyurethane resin, 0.4 part of flatting agent, 0.3 part of defoaming agent, 1 part of thickener, 12 parts of color paste and 2.5 parts of wear-resistant agent, wherein the wear-resistant agent is a mixture of DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin), and the mass ratio of the two is 1:1.2.
Preparation of recyclable double-sided luggage leather:
(1) Mechanically foaming the water-based bass foaming material to 1.5-1.7 times of the original volume (injecting a small amount of air at a mixing head to form bubbles in a polymer), coating the water-based bass foaming material on a recyclable base cloth layer (knitted fabric), and performing solidification, water washing and drying at 140-150 ℃ to obtain the water-based bass foaming layer;
(2) Coating the water-based paint on release paper, drying at 80-110 ℃, attaching the release paper to the surface of the water-based bass foaming layer, curing at 130-140 ℃, and separating the release paper to obtain a water-based dry PU semi-finished product;
(3) And (3) extruding WHT-8170RV TPU particles through a double-screw extruder, and compositing the extruded WHT-8170RV TPU particles with a water-based dry PU semi-finished product to obtain the recyclable double-sided luggage leather.
Example 3
The water-based foaming material comprises the following components: 100 parts of aqueous polyurethane resin, 25 parts of kaolin, 5 parts of foaming agent, 0.3 part of thickener, 0.2 part of flatting agent and 1.75 parts of color paste.
The water-based paint comprises the following components: 100 parts of aqueous polyurethane resin, 0.3 part of flatting agent, 0.2 part of defoaming agent, 0.75 part of thickening agent, 8.5 parts of color paste and 2 parts of wear-resistant agent, wherein the wear-resistant agent is a mixture of DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin) in a mass ratio of 1:1.
Preparation of recyclable double-sided luggage leather:
(1) Mechanically foaming the water-based bass foaming material to 1.5-1.7 times of the original volume (injecting a small amount of air at a mixing head to form bubbles in a polymer), coating the water-based bass foaming material on a recyclable base cloth layer (leather base cloth), and performing solidification, water washing and drying at 140-150 ℃ to obtain the water-based bass foaming layer;
(2) Coating the water-based paint on release paper, drying at 80-110 ℃, attaching the release paper to the surface of the water-based bass foaming layer, curing at 130-140 ℃, and separating the release paper to obtain a water-based dry PU semi-finished product;
(3) And (3) extruding WHT-8170RV TPU particles through a double-screw extruder, and compositing the extruded WHT-8170RV TPU particles with a water-based dry PU semi-finished product to obtain the recyclable double-sided luggage leather.
Comparative example 1 is substantially the same as example 3 except that the abrasion resistant agent used in the aqueous coating composition of comparative example 1 is all DY-9238B (Shanghai De tone).
Comparative example 2 is essentially the same as example 3 except that the abrasion resistant agent used in the aqueous coating of comparative example 2 is all HX-7025 (macroxin, guangzhou).
Comparative example 3 is substantially the same as example 3 except that the mass ratio of DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin) in the abrasion resistant agent used in the aqueous coating composition of comparative example 3 is 1:0.4.
Comparative example 4 is substantially the same as example 3 except that the mass ratio of DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin) in the abrasion resistant agent used in the aqueous coating composition of comparative example 4 is 1:1.6.
Comparative example 5 is essentially the same as example 3 except that the abrasion resistant agent used in the aqueous coating of comparative example 5 is all LA-3051 (alder, guangzhou).
Comparative example 6 is essentially the same as example 3 except that the abrasion resistant agent used in the aqueous coating of comparative example 6 is DPKS480 (Toguan Kogyo Co., ltd.).
Comparative example 7 is substantially the same as example 3 except that the abrasion resistant agent used in the aqueous coating of comparative example 7 is DY-9238B (Shanghai De Ying) and LA-3051 (Orthode Guangzhou) in a mass ratio of 1:1.
Comparative example 8 is substantially the same as example 3 except that the abrasion resistant agent used in the aqueous coating composition of comparative example 8 is DY-9238B (Shanghai Deyin) and DPKS480 (Dongguan Kogyo Co., ltd.) in a mass ratio of 1:1.
Comparative example 9 is essentially the same as example 3 except that the abrasion resistant agent used in the aqueous coating of comparative example 9 is HX-7025 (Guangzhou Hongxin) and LA-3051 (Guangzhou Orthode) in a mass ratio of 1:1.
Comparative example 10 is essentially the same as example 3 except that the abrasion resistant agent used in the aqueous coating of comparative example 10 is HX-7025 (Hongxin, guangzhou) and DPKS480 (Dongguan Kogyo sound technology Co., ltd.) in a mass ratio of 1:1.
Comparative example 11 is substantially the same as example 3 except that the abrasion resistant agent used in the aqueous coating composition of comparative example 11 was LA-3051 (alder, guangzhou) and DPKS480 (cyclic space sound technology limited) in a mass ratio of 1:1.
The luggage leather prepared in examples 1-3 and comparative examples 1-11 was subjected to performance test, and the test results are shown in Table 1.
TABLE 1
| Tensile Strength | Tear strength | 5N hardness rod | Martin del wear-resistant | Hand feel | |
| Example 1 | ＞200N | ＞25N | No scratch | 15 ten thousand times | Qualified product |
| Example 2 | ＞200N | ＞25N | No scratch | More than 20 ten thousand times | Qualified product |
| Example 3 | ＞200N | ＞25N | No scratch | More than 20 ten thousand times | Qualified product |
| Comparative example 1 | ＞200N | ＞25N | Slight scratch | More than 11 ten thousand times | Failure to pass |
| Comparative example 2 | ＞200N | ＞25N | Slight scratch | More than 10 ten thousand times | Failure to pass |
| Comparative example 3 | ＞200N | ＞25N | Slight scratch | More than 12 ten thousand times | Failure to pass |
| Comparative example 4 | ＞200N | ＞25N | Slight scratch | More than 14 ten thousand times | Failure to pass |
| Comparative example 5 | ＞200N | ＞25N | Leather surface damage | > 5000 times | Failure to pass |
| Comparative example 6 | ＞200N | ＞25N | Leather surface damage | > 5000 times | Failure to pass |
| Comparative example 7 | ＞200N | ＞25N | Obvious scratch | More than 8 ten thousand times | Failure to pass |
| Comparative example 8 | ＞200N | ＞25N | Obvious scratch | > 9 ten thousand times | Failure to pass |
| Comparative example 9 | ＞200N | ＞25N | Obvious scratch | > 9 ten thousand times | Failure to pass |
| Comparative example 10 | ＞200N | ＞25N | Obvious scratch | More than 8 ten thousand times | Failure to pass |
| Comparative example 11 | ＞200N | ＞25N | Leather surface damage | > 8000 times | Failure to pass |
As can be seen from Table 1, the luggage leather prepared in examples 1-3 has good wear resistance and qualified hand feeling. The mixture of DY-9238B and HX-7025 with the mass ratio limited by the application is used as the wear-resistant agent to help improve the wear resistance and the hand feeling of luggage leather.
Comparative examples 1 and 2 used only DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin) as wear-resistant agents, respectively, and had slight scratches on the surface after the 5N hardness bar test, and the number of wear-resistant tests was reduced. The DY-9238B (Shanghai Deyin) and HX-7025 (Guangzhou Hongxin) are compounded to form the wear-resisting agent, so that the wear-resisting agent has a certain synergistic effect, and is beneficial to improving the wear resistance of the surface layer.
The use of less HX-7025 (Hongxin, guangzhou) and less DY-9238B (Shanghai Deyin) in comparative examples 3 and 4, respectively, resulted in a slight decrease in abrasion resistance, indicating that better synergy can be achieved when the amounts of the two are comparable in the aqueous coating system of the present application, with either too much or too little being detrimental to synergy.
Comparative examples 5 and 6 used LA-3051 (alder, guangzhou) and DPKS480 (eastern guan, national institute of technology, inc.) as wear-resistant agents, respectively, and had significantly poorer wear resistance and unacceptable hand, which may be due to poor compatibility with aqueous polyurethane systems.
Comparative examples 7-10 were formulated with DY-9238B (Shanghai De tone) or HX-7025 (Guangzhou Hongxin) and LA-3051 (Guangzhou Orthode) or DPKS480 (Dongguan Kogyo technology Co., ltd.) to obtain wear-resistant agents, respectively, which failed to wear-resistant effects and hand feel, indicating that both LA-3051 (Guangzhou Orthode) and DPKS480 (Dongguan Kogyo technology Co., ltd.) were unfavorable for improving wear resistance and hand feel in the aqueous coating system of the present application.
Comparative example 11 was formulated with LA-3051 (alder, guangzhou) and DPKS480 (eastern guangzhu sound technology limited) to obtain an antiwear agent, and the prepared luggage leather had unacceptable wear resistance and feel, probably due to poor compatibility with aqueous polyurethane systems.
The present embodiment is merely illustrative of the present application, and the present application is not limited thereto, and a worker can make various changes and modifications without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of claims.
Claims (7)
1. A preparation method of recyclable double-sided luggage leather is characterized by comprising the following steps of: the method comprises the following steps:
(1) Coating the recyclable base cloth layer with aqueous polyurethane slurry subjected to mechanical foaming, solidifying, washing with water, and drying to obtain an aqueous base foaming layer;
(2) Coating water-based paint on release paper, drying to form a water-based surface layer which is attached to the surface of the water-based bass foaming layer, and separating the water-based surface layer from the release paper to obtain a water-based dry PU semi-finished product;
(3) Compounding the water-based dry PU semi-finished product with the TPU layer to obtain recyclable double-sided luggage leather;
the water-based paint in the step (2) comprises the following components in parts by weight:
100 parts of aqueous polyurethane resin
0.2 to 0.4 part of leveling agent
0.1 to 0.3 part of defoaming agent
0.5-1 part of thickener
Color paste 5-12 parts
1.5 to 2.5 parts of wear-resistant agent
The wear-resistant agent is a mixture of DY-9238B and HX-7025;
the mass ratio of DY-9238B to HX-7025 is 1:0.8-1.2.
2. The method for producing recyclable double-sided luggage leather as claimed in claim 1, wherein: the aqueous polyurethane slurry in the step (1) comprises the following components in parts by weight:
100 parts of aqueous polyurethane resin
0-50 parts of filler
4-6 parts of foaming agent
0.1-0.5 part of thickener
0.1 to 0.3 part of leveling agent
0.5-3 parts of color paste.
3. The method for producing recyclable double-sided luggage leather as claimed in claim 2, wherein: the filler is one or two of kaolin and calcium carbonate.
4. The method for producing recyclable double-sided luggage leather as claimed in claim 1, wherein: the recyclable base cloth layer in the step (1) is one of knitted fabric, woven fabric and non-woven fabric.
5. The method for producing recyclable double-sided luggage leather as claimed in claim 1, wherein: the step (1) specifically comprises the following steps: mechanically foaming the aqueous polyurethane slurry to 1.5-1.7 times of the original volume, coating the aqueous polyurethane slurry on a recyclable base cloth layer, and performing solidification, water washing and drying at 140-150 ℃ to obtain an aqueous base foaming layer;
the step (2) specifically comprises the following steps: the water-based paint is coated on release paper, is bonded with the surface of the water-based bass foaming layer after being dried at 80-110 ℃, is solidified at 130-140 ℃, and is separated from the release paper to obtain a water-based dry PU semi-finished product.
6. The method for producing recyclable double-sided luggage leather as claimed in claim 1, wherein: the TPU layer is prepared by adopting WHT-8170RV TPU.
7. The method for producing recyclable double-sided luggage leather as claimed in claim 1, wherein: the TPU layer is obtained by adhering to a semi-finished product after extrusion by an extruder.
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