CN106868880B - Water-based polyurethane imitated microfiber and manufacturing method thereof - Google Patents
Water-based polyurethane imitated microfiber and manufacturing method thereof Download PDFInfo
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- CN106868880B CN106868880B CN201710229614.0A CN201710229614A CN106868880B CN 106868880 B CN106868880 B CN 106868880B CN 201710229614 A CN201710229614 A CN 201710229614A CN 106868880 B CN106868880 B CN 106868880B
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- microfiber
- polyurethane
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 76
- 239000004814 polyurethane Substances 0.000 title claims abstract description 76
- 229920001410 Microfiber Polymers 0.000 title claims abstract description 35
- 239000003658 microfiber Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000004744 fabric Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000005498 polishing Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 15
- 238000005470 impregnation Methods 0.000 claims abstract description 13
- 238000005054 agglomeration Methods 0.000 claims abstract description 6
- 230000002776 aggregation Effects 0.000 claims abstract description 6
- 230000015271 coagulation Effects 0.000 claims abstract description 6
- 238000005345 coagulation Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 18
- 239000002585 base Substances 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 239000002562 thickening agent Substances 0.000 claims description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000008399 tap water Substances 0.000 claims description 9
- 235000020679 tap water Nutrition 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 3
- 230000001112 coagulating effect Effects 0.000 abstract description 19
- 239000002904 solvent Substances 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 6
- 229920005749 polyurethane resin Polymers 0.000 abstract description 5
- 239000002932 luster Substances 0.000 abstract description 4
- 239000003960 organic solvent Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract description 3
- 239000002759 woven fabric Substances 0.000 description 33
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002649 leather substitute Substances 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000207208 Aquifex Species 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001599 direct drying Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000004064 recycling Methods 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
-
- 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
- D06N3/0006—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 woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention provides a waterborne polyurethane imitated microfiber and a manufacturing method thereof, and the waterborne polyurethane imitated microfiber comprises the following steps: 1) impregnation treatment of base cloth: placing the base fabric in aqueous polyurethane impregnating resin for soaking treatment; 2) and (3) agglomeration: placing the mixture in a coagulating liquid for coagulation treatment; 3) washing, drying and shaping; 4) grinding the skin: and (5) polishing the surface to obtain the waterborne polyurethane microfiber imitation. The water-based polyurethane resin slurry is adopted, so that the imitated microfiber does not contain any organic solvent in the preparation and use processes, the problem of solvent residue pollution of solvent-based wet-process imitated microfiber in the prior art is solved, and clean production is realized; the water-based polyurethane wet-process imitated microfiber obtained by the invention has the advantages of compact and compact structure, high tearing strength, flexible hand feeling, bright metal luster, high brightness and strong third dimension, and can solve the problems that the water-based dry-process imitated microfiber is difficult to control the hand feeling, low in production efficiency and high in cost.
Description
Technical Field
The invention relates to the technical field of imitated microfiber, in particular to a waterborne polyurethane imitated microfiber and a manufacturing method thereof.
Background
At present, synthetic leather is applied to various fields in people's lives, and the variety is various. The imitated microfiber is a product developed in the synthetic leather industry in recent years and has the advantages of light weight, tear resistance, heat resistance, toughness, good cold resistance, high tensile strength and the like. At present, the imitated microfiber is still manufactured by a solvent type polyurethane wet method and a water-based polyurethane dry method, wherein DMF (dimethyl formamide) in the solvent type polyurethane is replaced by water by a wet method process, so that a coating has continuous air holes, and a certain thickness is achieved to increase the stereoscopic effect. However, a large amount of DMF is used in the coating slurry, and the solvent cannot be completely recovered by water washing and replacement, so that not only is the solvent residue harmful to the health of consumers, but also the investment cost and a large amount of energy consumption are required for recovering the solvent. The dry method for manufacturing the waterborne polyurethane is a direct drying method after impregnation is finished, and the problems of difficult control of hand feeling and production efficiency are solved. The waterborne polyurethane resin takes water as a dispersion medium, is environment-friendly and nontoxic, is a substitute of solvent type polyurethane resin, and carries out great policy and fund support on the preparation of synthetic leather by waterborne polyurethane in partial areas of China. In recent years, the research on the preparation of the waterborne polyurethane synthetic leather has been greatly advanced, but the research on the imitated microfiber is still under the progress of the traditional manufacturing process and the semi-waterborne process, and particularly, the research on achieving the hand feeling of the microfiber or the real leather and the ecological environmental protection needs to be further developed.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide a water-based polyurethane microfiber-like material and a manufacturing method thereof, which are used for solving the problems in the prior art that solvent residues exist in a solvent-based wet microfiber-like material, the recycling cost is high, the hand feeling of the water-based dry microfiber-like material is difficult to control, the production efficiency is low, and the cost is high.
In order to achieve the above objects and other related objects, the present invention provides a method for manufacturing a water-based polyurethane microfiber-like material, comprising the steps of: 1) impregnation treatment of base cloth: placing the base cloth in aqueous polyurethane impregnating resin for soaking treatment, and then extruding the excess impregnating resin by a pressing roller; 2) and (3) agglomeration: placing the base cloth treated in the step 1) in a solidification solution for coagulation treatment, and extruding redundant solidification solution by a pressing roller; 3) washing and drying: washing the base cloth treated in the step 2) with water to remove residual solidification liquid on the base cloth, and then drying and shaping; 4) grinding the skin: polishing the surface of the base fabric treated in the step 3) to obtain the waterborne polyurethane imitated microfiber.
Preferably, the aqueous polyurethane impregnating resin comprises aqueous polyurethane, an aqueous thickening agent and water. The impregnation treatment agent which takes the environment-friendly water-based polyurethane as the main component ensures that the imitated microfiber does not contain any organic solvent in the preparation and use processes.
Preferably, the aqueous polyurethane is an aliphatic polyurethane or an aromatic polyurethane, the solid content of which is 30%.
Preferably, the aqueous thickener is an associative polyurethane thickener or an alkali-swellable acrylic thickener.
Preferably, the viscosity of the aqueous polyurethane impregnating resin is 1500-3500cps, and the pH value is 6-8.
Preferably, the solidification solution in the step 2) comprises the following raw materials in parts by weight: 5-15 parts of demulsifying crosslinking agent and 80-95 parts of water.
Preferably, the demulsifying crosslinking agent is selected from one or more of carbonic acid, lactic acid, citric acid, phosphoric acid, calcium chloride, sodium chloride, ferric sulfate, ferric chloride and aluminum chloride.
Preferably, the coating amount of the impregnating resin on the base fabric treated by the step 1) is 500-1000 g/m2。
Preferably, the drying temperature in the step 3) is 120-160 ℃, and the drying time is 3-5 min.
Preferably, the base cloth is double-sided fluff woven cloth, and the lengths of the fluff on the front side and the fluff on the back side are 2-2.5 mm.
To achieve the above and other related objects, the present invention provides an aqueous polyurethane microfiber-like material prepared by the method for preparing an aqueous polyurethane microfiber-like material as described above.
As described above, the aqueous polyurethane microfiber-like material and the method for manufacturing the same according to the present invention have the following advantageous effects: according to the invention, the aqueous polyurethane wet process is adopted, the woven fabric is subjected to impregnation treatment of the aqueous polyurethane impregnating resin, the aqueous polyurethane impregnating resin is better wrapped on the woven fabric through condensation, and then the woven fabric is washed, dried and ground to obtain the aqueous polyurethane microfiber-like fabric, so that the operation is simple and the production efficiency is high; the aqueous polyurethane resin slurry is adopted, so that the imitated microfiber does not contain any organic solvent in the preparation and use processes, the problem of solvent residue pollution of solvent type wet-process imitated microfiber in the prior art is solved, and clean production is realized; the water-based polyurethane wet-process imitated microfiber obtained by the water-based polyurethane wet-process has the advantages of fine and compact structure, high tearing strength, flexible hand feeling, bright metal luster, high brightness and strong three-dimensional sense, completely meets the requirements of the existing market on imitated microfiber products, and can solve the problems that the water-based dry-process imitated microfiber is difficult to control the hand feeling, low in production efficiency and high in cost.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
The following examples further illustrate the method for producing the aqueous polyurethane microfiber-like material and the aqueous polyurethane microfiber-like material of the present invention using a double-faced pile woven fabric as a base fabric and aqueous polyurethane of the Nature science and technology, Inc., of Fertilizer science and technology, as a raw material for preparing an impregnated resin:
example 1
A method for manufacturing a waterborne polyurethane microfiber comprises the following steps:
1. preparing materials:
(1) impregnated resin
10kg of waterborne polyurethane KTL770 (aliphatic resin, Limited liability company of Tianshui science and technology, Hefei science) with a solid content of 30% is added into 10kg of tap water, and a waterborne thickener 3220 (Shenzhen Hichuan chemical industry) is added, and the mixture is stirred uniformly at a high speed, the viscosity is adjusted to 3500cps, and the pH value is 7.
(2) Preparing a coagulating liquid
10kg of phosphoric acid and 40kg of tap water were mixed and stirred to completely dissolve the phosphoric acid in the water.
2. Preparing the waterborne polyurethane imitated microfiber:
(1) impregnation treatment: placing the double-sided fluff woven fabric into an impregnation tank filled with waterborne polyurethane impregnating resinPerforming soaking treatment, and extruding excessive impregnating resin by a rolling roller to make the coating amount of the impregnating resin on the woven fabric be 500g/m2(ii) a The pressing roller is also beneficial to extruding the impregnated resin into the woven fabric when extruding the redundant impregnated resin, and the extrusion gap of the pressing roller is set according to the thickness of the woven fabric and the coating amount of the surface of the woven fabric;
(3) and (3) agglomeration: placing the woven fabric treated in the step 1) into a coagulating liquid in a coagulating tank for coagulation treatment, wherein the coagulating liquid can enable the waterborne polyurethane to be demulsified and crosslinked into a film, so that the waterborne polyurethane impregnated resin can be better wrapped on the woven fabric, and then squeezing out the redundant coagulating liquid through a press roller;
(4) washing and drying: placing the woven fabric treated in the step 2) into a washing tank for washing to remove residual coagulating liquid on the woven fabric, drying in a drying oven at 120 ℃ for 5min, and shaping;
(5) grinding the skin: and (3) polishing the surface of the woven fabric treated in the step (3) by using a skin-polishing machine to enable the surface to have stronger velvet feeling, wherein the mesh number of the selected abrasive paper in the skin-polishing machine is 120 meshes, and the water-based polyurethane microfiber can be obtained after the skin-polishing treatment.
Example 2
A method for manufacturing a waterborne polyurethane microfiber comprises the following steps:
1. preparing materials:
(1) impregnated resin
12kg of waterborne polyurethane KTL775 (Aquifex scientific and technical Limited liability company, Hefei-Cofei-Tegaku, aromatic resin) with a solid content of 30% was added into 8kg of tap water, and a waterborne thickener RHEOLATE208 was added, and the mixture was stirred at a high speed uniformly, the viscosity was adjusted to 2500cps, and the pH was 6.
(2) Preparing a coagulating liquid
20kg of calcium chloride and 80kg of tap water were mixed and stirred to completely dissolve the calcium chloride in the water.
2. Preparing the waterborne polyurethane imitated microfiber:
(1) impregnation treatment: placing the double-sided fluff woven fabric into an impregnation tank containing waterborne polyurethane impregnating resin for soaking treatment, and then introducingExtruding the excess impregnating resin by a rolling roller to ensure that the coating amount of the impregnating resin on the woven fabric is 800g/m2(ii) a The pressing roller is also beneficial to extruding the impregnated resin into the woven fabric when extruding the redundant impregnated resin, and the extrusion gap of the pressing roller is set according to the thickness of the woven fabric and the coating amount of the surface of the woven fabric;
(3) and (3) agglomeration: placing the woven fabric treated in the step 1) into a coagulating liquid in a coagulating tank for coagulation treatment, wherein the coagulating liquid can enable the waterborne polyurethane to be demulsified and crosslinked into a film, so that the waterborne polyurethane impregnated resin can be better wrapped on the woven fabric, and then squeezing out the redundant coagulating liquid through a press roller;
(4) washing and drying: placing the woven fabric treated in the step 2) into a washing tank for washing to remove residual coagulating liquid on the woven fabric, drying in an oven at 140 ℃ for 4min, and shaping;
(5) grinding the skin: and (3) polishing the surface of the woven fabric treated in the step (3) by using a skin-polishing machine to enable the surface to have stronger velvet feeling, wherein the mesh number of the selected abrasive paper in the skin-polishing machine is 120 meshes, and the water-based polyurethane microfiber can be obtained after the skin-polishing treatment.
Example 3
A method for manufacturing a waterborne polyurethane microfiber comprises the following steps:
1. preparing materials:
(1) impregnated resin
30kg of waterborne polyurethane KTL776 (aromatic resin, Provisions Nature science and technology Limited, Hefei Ke) with the solid content of 30% is added into 5kg of tap water, and the waterborne thickener 3220 (Shenzhen Hichuan chemical industry) is added and stirred uniformly at high speed, the viscosity is adjusted to 1500cps, and the pH value is 8.
(2) Preparing a coagulating liquid
3kg of lactic acid, 6kg of citric acid and 91kg of tap water were mixed and stirred to completely dissolve phosphoric acid in water.
2. Preparing the waterborne polyurethane imitated microfiber:
(1) impregnation treatment: placing the double-sided fluff woven fabric into an impregnation tank containing waterborne polyurethane impregnating resin for impregnation treatment, and then bindingThe press roller extrudes the redundant impregnated resin to ensure that the coating amount of the impregnated resin on the woven cloth is 1000g/m2(ii) a The pressing roller is also beneficial to extruding the impregnated resin into the woven fabric when extruding the redundant impregnated resin, and the extrusion gap of the pressing roller is set according to the thickness of the woven fabric and the coating amount of the surface of the woven fabric;
(3) and (3) agglomeration: placing the woven fabric treated in the step 1) into a coagulating liquid in a coagulating tank for coagulation treatment, wherein the coagulating liquid can enable the waterborne polyurethane to be demulsified and crosslinked into a film, so that the waterborne polyurethane impregnated resin can be better wrapped on the woven fabric, and then squeezing out the redundant coagulating liquid through a press roller;
(4) washing and drying: placing the woven fabric treated in the step 2) into a washing tank for washing to remove residual coagulating liquid on the woven fabric, drying in a drying oven at 160 ℃ for 3min, and shaping;
(5) grinding the skin: and (3) polishing the surface of the woven fabric treated in the step (3) by using a skin-polishing machine to enable the surface to have stronger velvet feeling, wherein the mesh number of the selected abrasive paper in the skin-polishing machine is 120 meshes, and the water-based polyurethane microfiber can be obtained after the skin-polishing treatment.
And (3) detection results:
the aqueous polyurethane microfiber-like material prepared by the method of the present invention was tested for flexibility in hand, structural compactness, metallic luster, brightness, and three-dimensional property, and the results are shown in table 1:
TABLE 1 Performance parameter test results
As can be seen from Table 1, the waterborne polyurethane microfiber-like product prepared by the method for preparing the waterborne polyurethane microfiber-like product has the advantages of compact and compact structure, high tearing strength, flexible hand feeling, bright metal luster, high brightness and strong stereoscopic impression, completely meets the requirements of the existing market for microfiber-like products, and can solve the problems that the waterborne dry microfiber-like product is difficult to control the hand feeling, the production efficiency is low and the cost is high. In addition, the aqueous polyurethane resin slurry is adopted, so that the imitated microfiber does not contain any organic solvent in the preparation and use processes, the problem of solvent residue pollution of solvent-based wet-process imitated microfiber in the prior art is solved, and clean production is realized.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. The method for manufacturing the waterborne polyurethane microfiber is characterized by comprising the following steps of:
1) impregnation treatment of base cloth: placing the base cloth in aqueous polyurethane impregnating resin for soaking treatment, and then extruding the excess impregnating resin by a pressing roller;
2) and (3) agglomeration: placing the base cloth treated in the step 1) in a solidification solution for coagulation treatment, and extruding redundant solidification solution by a pressing roller;
3) washing and drying: washing the base cloth treated in the step 2) with water to remove residual solidification liquid on the base cloth, and then drying and shaping;
4) grinding the skin: polishing the surface of the base fabric treated in the step 3) to obtain the waterborne polyurethane imitated microfiber;
wherein the aqueous polyurethane impregnating resin is selected from:
adding 10kg of waterborne polyurethane KTL770 with the solid content of 30% into 10kg of tap water, adding a waterborne thickener 3220, uniformly stirring at a high speed, adjusting the viscosity to 3500cps, and adjusting the pH value to 7 to prepare waterborne polyurethane impregnated resin;
or adding 12kg of waterborne polyurethane KTL775 with the solid content of 30% into 8kg of tap water, adding a waterborne thickener RHEOLATE208, stirring uniformly at a high speed, adjusting the viscosity to 2500cps, and adjusting the pH value to 6 to prepare the waterborne polyurethane impregnated resin;
or adding 30kg of aqueous polyurethane KTL776 with a solid content of 30% into 5kg of tap water, adding aqueous thickener 3220, stirring at high speed, adjusting the viscosity to 1500cps, and adjusting the pH value to 8.
2. The method for producing the aqueous polyurethane microfiber-like material of claim 1, wherein: the solidification liquid in the step 2) comprises the following raw materials in parts by weight: 5-15 parts of demulsifying crosslinking agent and 80-95 parts of water.
3. The method for producing the aqueous polyurethane microfiber-like material according to claim 2, wherein: the demulsifying crosslinking agent is selected from one or more of carbonic acid, lactic acid, citric acid, phosphoric acid, calcium chloride, sodium chloride, ferric sulfate, ferric chloride and aluminum chloride.
4. The method for producing the aqueous polyurethane microfiber-like material of claim 1, wherein: the coating amount of the impregnating resin on the base fabric treated by the step 1) is 500-1000 g/m2。
5. The method for producing the aqueous polyurethane microfiber-like material of claim 1, wherein: the drying temperature in the step 3) is 120-160 ℃, and the drying time is 3-5 min.
6. A water-based polyurethane microfiber-like material produced by the method according to any one of claims 1 to 5.
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| CN107401060B (en) * | 2017-07-05 | 2020-08-04 | 兰州科天新材料股份有限公司 | Preparation method of water-based bass with compression-resistant high-resilience performance |
| CN108625186A (en) * | 2018-04-10 | 2018-10-09 | 合肥科天水性科技有限责任公司 | A kind of method of wet method impregnation processing regenerated bark base material |
| CN108823679A (en) * | 2018-06-22 | 2018-11-16 | 兰州科天水性高分子材料有限公司 | A kind of preparation method of aqueous wet process woven fabric bass |
| CN111501359A (en) * | 2019-01-31 | 2020-08-07 | 宁波加利得仿生材料有限公司 | Solvent-free aqueous environment-friendly polishing leather and manufacturing method and manufacturing equipment thereof |
| CN111455687B (en) * | 2020-04-15 | 2022-09-16 | 杭州传化精细化工有限公司 | Impregnation processing technology of water-based microfiber synthetic leather |
| CN113417151B (en) * | 2021-07-08 | 2023-01-03 | 江苏聚杰微纤科技集团股份有限公司 | Environment-friendly PU artificial leather with oily-like cellular structure and preparation method thereof |
| CN115821601A (en) * | 2022-12-20 | 2023-03-21 | 万桦（常州）新材料科技有限公司 | Colorless-migration water-based imitated microfiber artificial leather and preparation method thereof |
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