CN112195661A - Preparation method of polyurethane synthetic leather for sports shoes with remarkable three-dimensional effect - Google Patents
Preparation method of polyurethane synthetic leather for sports shoes with remarkable three-dimensional effect Download PDFInfo
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- CN112195661A CN112195661A CN202011059978.7A CN202011059978A CN112195661A CN 112195661 A CN112195661 A CN 112195661A CN 202011059978 A CN202011059978 A CN 202011059978A CN 112195661 A CN112195661 A CN 112195661A
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 54
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 52
- 230000000694 effects Effects 0.000 title claims abstract description 23
- 239000002649 leather substitute Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 47
- 238000004049 embossing Methods 0.000 claims abstract description 43
- 239000004744 fabric Substances 0.000 claims abstract description 40
- 238000005187 foaming Methods 0.000 claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010985 leather Substances 0.000 claims description 33
- 239000002562 thickening agent Substances 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 15
- 238000010409 ironing Methods 0.000 claims description 13
- 238000005470 impregnation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000643 oven drying Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000003490 calendering Methods 0.000 abstract description 4
- 239000012798 spherical particle Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000005422 blasting Methods 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LVNGJLRDBYCPGB-LDLOPFEMSA-N (R)-1,2-distearoylphosphatidylethanolamine Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[NH3+])OC(=O)CCCCCCCCCCCCCCCCC LVNGJLRDBYCPGB-LDLOPFEMSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013012 foaming technology Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011850 water-based material 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
- D06N3/12—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
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Abstract
The invention discloses a preparation method of polyurethane synthetic leather for sports shoes with obvious three-dimensional effect, which sequentially comprises the following steps: 1. impregnating the base fabric with aqueous polyurethane slurry; 2. pretreating the impregnated base fabric with a calcium nitrate solution; 3. coating aqueous polyurethane foaming slurry on the surface of the base fabric after calendaring; 4. when the pulp is dried to a surface film forming state and is not completely dried, the pulp is directly transferred to an embossing roller by a guide roller to be embossed, and the pulp is dried to be completely dried and then cured. The invention selects the waterborne polyurethane which has relatively low molecular weight and is microscopically formed by accumulating spherical particles as the foaming slurry, and the waterborne foaming layer is embossed at low temperature through post-treatment, so that the product has strong concave-convex stereoscopic impression, and can be directly applied to the sports shoe uppers.
Description
Technical Field
The invention belongs to the technical field of synthetic leather, and particularly relates to polyurethane synthetic leather for sports shoes with a remarkable three-dimensional effect and a preparation method thereof.
Background
At present, synthetic leather is applied to various fields in people's lives, and the variety is various. The sports shoe leather is an important branch of the synthetic leather industry, and has the advantages of high stripping, abrasion resistance, good weather resistance and the like. At present, the three-dimensional effect of the leather of the sports shoes is mainly finished by dry veneering and then post-processing embossing or is subjected to air pressing one by one after being punched by downstream customers, the embossing effect of the leather of the sports shoes cannot be expected, and the leather of the sports shoes has complicated steps, consumes time and labor and is unstable in process. The Chinese patent application No. 201611140003.0 has the patent name of 'waterborne polyurethane decorative leather and a manufacturing method thereof', the provided method comprises the steps of wet process bass production, dry process direct coating, high temperature embossing and the like, the steps of the product produced by the preparation method are complicated, and because the product produced by the bass production and the dry process direct coating needs to be completely dried by an oven, the resin is completely cured and glued, and the leather surface has certain temperature resistance and pressure resistance, the embossing effect is not ideal.
Disclosure of Invention
The invention aims to provide polyurethane synthetic leather for sports shoes with remarkable three-dimensional effect and a preparation method thereof, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the polyurethane synthetic leather for the sneakers with the obvious three-dimensional effect sequentially comprises the following steps of: 1. ironing the base cloth and then impregnating the base cloth with the aqueous polyurethane slurry; 2. after the impregnation base cloth is extruded, the impregnation base cloth is pretreated by a calcium nitrate solution; 3. The pretreated base fabric is subjected to ironing, press polishing and primary oven drying in sequence, and then the waterborne polyurethane foaming slurry is blade-coated; 4. And when the slurry enters a middle drying oven to be dried until the surface of the slurry is formed into a film and is not completely dried, obtaining semi-finished leather, transferring the semi-finished leather to an embossing roller through a transfer guide roller to carry out low-temperature embossing treatment, and delivering the semi-finished leather to a final drying oven to be dried completely and then cured.
In the step 1, the aqueous polyurethane slurry comprises the following components in parts by weight:
80-110 parts of waterborne Polyurethane (PU),
2-4 parts of a cross-linking agent,
0.4 to 0.8 portion of aqueous thickening agent,
the impregnation speed is 10m/min, and the liquid carrying rate of the impregnated base fabric is 8-20%;
in the step 2, the concentration of the calcium nitrate solution is 5% -10%, the temperature of the pretreatment tank is 80 +/-5 ℃, the pretreatment vehicle speed is 10 +/-1 m/min, and the pretreatment material consumption is 70-90 g/m;
in a further scheme, in the step 3, the ironing is six-roller heating ironing, the ironing temperature is 130-:
the waterborne polyurethane foaming slurry is foamed by a foaming machine and then coated on base cloth, the foaming multiplying power is 2.2-4.2 times, and the coating amount is 600-1200 g/m;
further, in the step 4, the temperature of the middle drying oven is 80 +/-5 ℃, 90 +/-5 ℃, 100 +/-5 ℃, 110 +/-5 ℃, the air blasting is respectively 10 +/-5 Hz, 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled to be 10 +/-1 m/min, the length of the drying oven is 15m, the transfer guide roller is a preheating roller, the temperature of the preheating roller is 110 +/-5 ℃, the embossing roller is a hexagonal gradual-change roller, the temperature of the embossing roller is 120 +/-10 ℃, the embossing roller is laminated to be 50% -70% of the thickness of the semi-finished leather, and the embossing speed is 10 +/-1 m/min; the temperature of the final oven is 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, the coating speed is controlled to be 10 +/-1 m/min, the total air blast is 35 +/-5 Hz, and the length of the oven is 30 m.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention innovates the process flow, the traditional synthetic leather embossing needs the wet method bass production, the dry method veneering and the final embossing treatment, each step needs drying and rolling, the process is complicated, the time and the labor are consumed, and the cost is increased. The invention abandons the traditional method, adopts the water-based foaming technology, carries out low-temperature embossing treatment in an incomplete drying state after the wet foaming slurry is formed into a film, has obvious three-dimensional effect of the obtained product, has simple production process, and shortens the production period and the cost.
(2) The invention innovates the selection of the foaming slurry, the microstructure shows that the water-based material film-forming is formed by stacking spherical particles, and the intermolecular acting force plays a great role in the film structure, so the invention preferably selects the water-based foaming slurry with lower molecular weight as the raw material of the product, the embossing effect of the product obtained after foaming is obvious, and the product can not rebound after curing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the present invention, and of course, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
The types and suppliers of reagents used in this example were as follows:
the base fabric is a polyester non-woven fabric of Zhejiang Haining Hongyuan non-woven fabric industry Co., Ltd, the aqueous polyurethane in the impregnation of the aqueous polyurethane slurry is specifically a Starer fine coating Co., Ltd EX-RU-13-926, the aqueous thickening agent is Van Hua chemical group Co., Ltd U605, the cross-linking agent is Pic chemical BYK-4501, and the embossing roller is a hexagonal gradual change roller of Kunshan fortune Co., Ltd;
the waterborne polyurethane emulsion is prepared from EX-RU-45-124, light calcium carbonate as a filler, A3 foaming agent, ByK-346 as a flatting agent, ByK-1166 as an anti-sticking agent, and DSPE 0027 as a waterborne color paste.
Example 1
A preparation method of polyurethane synthetic leather for sports shoes with obvious three-dimensional effect comprises the following steps:
1. selecting 1.05mm polyester-polyester needle-punched non-woven fabric as base fabric, ironing the base fabric, impregnating the base fabric with aqueous polyurethane slurry, weighing 80 parts of aqueous polyurethane slurry, 2 parts of cross-linking agent and 0.4 part of aqueous thickening agent, uniformly stirring to obtain aqueous polyurethane slurry, wherein the liquid carrying rate of the base fabric impregnated with the slurry is 8%;
2. after the impregnation base cloth is extruded, pretreating with 5% calcium nitrate solution, wherein the consumption of pretreatment materials is 70 g/m;
3. the pretreated base cloth is sequentially ironed at 130 ℃, calendered at 120 ℃ and 2.2MPa and then enters a primary oven for drying, the temperature of the primary oven is 90 +/-5 ℃, 95 +/-5 ℃ and 100 +/-5 ℃, the air blast is respectively 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled at 10 +/-1 m/min, and the length of the oven is 10 m;
4. weighing 30 parts of aqueous polyurethane emulsion, 10 parts of filler, 1 part of foaming agent, 0.5 part of flatting agent, 2 parts of aqueous color paste, 2 parts of anti-sticking agent and 0.4 part of thickening agent, preparing aqueous polyurethane foaming slurry, putting raw materials except the thickening agent in the slurry formula into a container according to the formula proportion, uniformly stirring by using a dispersion mixer, filtering, and adding the thickening agent to adjust the viscosity. And (3) coating the waterborne polyurethane foaming slurry on the pretreated base cloth in the step 3 through a foaming machine. The coating amount of the waterborne polyurethane foaming slurry is 600 g/m; the expansion ratio was about 2.2 times. The temperature of the middle baking oven is 80 +/-5 ℃, 90 +/-5 ℃, 100 +/-5 ℃ and 110 +/-5 ℃, the air blasting is respectively 10 +/-5 Hz, 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled at 10 +/-1 m/min, and the length of the baking oven is 15 m;
5. and when the slurry enters and exits the middle oven and is dried to form a film on the surface and is not completely dried, obtaining semi-finished leather, transferring the semi-finished leather to an embossing roller through a transfer guide roller for embossing treatment, and delivering the semi-finished leather to a final oven and curing after the semi-finished leather is completely dried. The transfer guide roller is a preheating roller, the temperature of the preheating roller is 110 +/-5 ℃, the embossing roller is a hexagonal tapered roller, the temperature of the embossing roller is 140 +/-10 ℃, the embossing roller is laminated to be 50% of the thickness of the semi-finished leather, and the embossing speed is 10 +/-1 m/min. The temperature of the final oven is 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, the coating speed is controlled to be 10 +/-1 m/min, the total air blast is 35 +/-5 Hz, and the length of the oven is 30 m. The obtained product has obvious embossing effect, does not rebound after curing, and the physical properties of the product meet the relevant standards of sports shoe leather.
Example 2
A preparation method of polyurethane synthetic leather for sports shoes with obvious three-dimensional effect comprises the following steps:
1. selecting 0.95mm polyester-polyester needle-punched non-woven fabric as base fabric, ironing the base fabric, impregnating the base fabric with aqueous polyurethane slurry, weighing 110 parts of aqueous polyurethane slurry, 4 parts of cross-linking agent and 0.8 part of aqueous thickening agent, uniformly stirring to obtain aqueous polyurethane slurry, wherein the liquid carrying rate of the base fabric impregnated with the slurry is 10%;
2. after the impregnation base cloth is extruded, pretreating by using a 7% calcium nitrate solution, wherein the consumption of pretreatment materials is 90 g/m;
3. the pretreated base cloth is sequentially ironed at 130 ℃, calendered at 120 ℃ and 3.2MPa and then enters a primary oven for drying, the temperature of the primary oven is 90 +/-5 ℃, 95 +/-5 ℃ and 100 +/-5 ℃, the blast air is respectively 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled at 10 +/-1 m/min, and the length of the oven is 10 m;
4. weighing 50 parts of aqueous polyurethane emulsion, 15 parts of filler, 2 parts of foaming agent, 0.8 part of flatting agent, 6 parts of aqueous color paste, 3 parts of anti-sticking agent and 0.8 part of thickening agent, preparing aqueous polyurethane foaming slurry, putting raw materials except the thickening agent in the slurry formula into a container according to the formula proportion, uniformly stirring by using a dispersion mixer, filtering, and adding the thickening agent to adjust the viscosity. And (3) coating the waterborne polyurethane foaming slurry on the pretreated base cloth in the step 3 through a foaming machine. The coating amount of the waterborne polyurethane foaming slurry is 800 g/m; the expansion ratio was about 2.8 times. The temperature of the middle baking oven is 80 +/-5 ℃, 90 +/-5 ℃, 100 +/-5 ℃ and 110 +/-5 ℃, the air blasting is respectively 10 +/-5 Hz, 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled at 10 +/-1 m/min, and the length of the baking oven is 15 m;
5. and when the slurry enters and exits the middle oven and is dried to form a film on the surface and is not completely dried, obtaining semi-finished leather, transferring the semi-finished leather to an embossing roller through a transfer guide roller for embossing treatment, and delivering the semi-finished leather to a final oven and curing after the semi-finished leather is completely dried. The transfer guide roller is a preheating roller, the temperature of the preheating roller is 110 +/-5 ℃, the embossing roller is a hexagonal tapered roller, the temperature of the embossing roller is 140 +/-10 ℃, the embossing roller is laminated to be 60% of the thickness of the semi-finished leather, and the embossing speed is 10 +/-1 m/min. The temperature of the final oven is 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, the coating speed is controlled to be 10 +/-1 m/min, the total air blast is 35 +/-5 Hz, and the length of the oven is 30 m. The obtained product has obvious embossing effect, does not rebound after curing, and the physical properties of the product meet the relevant standards of sports shoe leather.
Example 3
A preparation method of polyurethane synthetic leather for sports shoes with obvious three-dimensional effect comprises the following steps:
1. selecting 0.95mm polyester-polyester needle-punched non-woven fabric as base fabric, ironing the base fabric, impregnating the base fabric with aqueous polyurethane slurry, weighing 80 parts of aqueous polyurethane slurry, 3 parts of cross-linking agent and 0.6 part of aqueous thickening agent, uniformly stirring to obtain aqueous polyurethane slurry, wherein the liquid carrying rate of the base fabric impregnated with the slurry is 20%;
2. after the impregnation base cloth is extruded, pretreating with 10% calcium nitrate solution, wherein the consumption of pretreatment materials is 90 g/m;
3. the pretreated base cloth is sequentially ironed at 130 ℃, calendered at 120 ℃ and 2.2MPa and then enters a primary oven for drying, the temperature of the primary oven is 90 +/-5 ℃, 95 +/-5 ℃ and 100 +/-5 ℃, the air blast is respectively 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled at 10 +/-1 m/min, and the length of the oven is 10 m;
4. weighing 60 parts of aqueous polyurethane emulsion, 20 parts of filler, 3 parts of foaming agent, 1.2 parts of flatting agent, 8 parts of aqueous color paste, 5 parts of anti-sticking agent and 1.8 parts of thickening agent, preparing aqueous polyurethane foaming slurry, putting raw materials except the thickening agent in the slurry formula into a container according to the formula proportion, uniformly stirring by using a dispersion mixer, filtering, and adding the thickening agent to adjust the viscosity. And (3) coating the waterborne polyurethane foaming slurry on the pretreated base cloth in the step 3 through a foaming machine. The coating amount of the waterborne polyurethane foaming slurry is 1200 g/m; the expansion ratio was about 3.8 times. The temperature of the middle baking oven is 80 +/-5 ℃, 90 +/-5 ℃, 100 +/-5 ℃ and 110 +/-5 ℃, the air blasting is respectively 10 +/-5 Hz, 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz, the coating speed is controlled at 10 +/-1 m/min, and the length of the baking oven is 15 m;
5. and when the slurry enters and exits the middle oven and is dried to form a film on the surface and is not completely dried, obtaining semi-finished leather, transferring the semi-finished leather to an embossing roller through a transfer guide roller for embossing treatment, and delivering the semi-finished leather to a final oven and curing after the semi-finished leather is completely dried. The transfer guide roller is a preheating roller, the temperature of the preheating roller is 110 +/-5 ℃, the embossing roller is a hexagonal tapered roller, the temperature of the embossing roller is 140 +/-10 ℃, the embossing roller is laminated to be 60% of the thickness of the semi-finished leather, and the embossing speed is 10 +/-1 m/min. The temperature of the final oven is 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, the coating speed is controlled to be 10 +/-1 m/min, the total air blast is 35 +/-5 Hz, and the length of the oven is 30 m. The obtained product has obvious embossing effect, does not rebound after curing, and the physical properties of the product meet the relevant standards of sports shoe leather.
Table 1 results of performance tests of the finished products obtained in the examples
Claims (6)
1. A preparation method of polyurethane synthetic leather for sports shoes with obvious three-dimensional effect is characterized by comprising the following steps:
the method sequentially comprises the following steps: (1) ironing the base cloth and then impregnating the base cloth with the aqueous polyurethane slurry; (2) after the impregnation base cloth is extruded, a calcium nitrate solution is used for pretreatment; (3) the pretreated base fabric is subjected to ironing, press polishing and primary oven drying in sequence, and then the waterborne polyurethane foaming slurry is blade-coated; (4) and when the slurry enters a middle drying oven and is dried to form a film on the surface and is not completely dried, obtaining semi-finished leather, transmitting the semi-finished leather to an embossing roller through a transmission guide roller for low-temperature embossing treatment, and sending the semi-finished leather to a final drying oven and curing after the semi-finished leather is completely dried.
2. The preparation method of the polyurethane synthetic leather for the sports shoes with the obvious stereoscopic effect according to claim 1 is characterized by comprising the following steps of: the base fabric is a needle-punched non-woven fabric, the thickness of the base fabric is 0.6-1.2mm, and the aqueous polyurethane slurry is prepared by mixing the following components in parts by weight:
80-110 parts of waterborne Polyurethane (PU),
2-4 parts of a cross-linking agent,
0.4 to 0.8 portion of aqueous thickening agent,
the impregnation speed is 10m/min, and the liquid carrying rate of the impregnated base fabric is 8-20%.
3. The preparation method of the polyurethane synthetic leather for the sports shoes with the obvious stereoscopic effect according to claim 1 is characterized by comprising the following steps of: the concentration of the calcium nitrate solution is 5% -10%, the temperature of the pretreatment tank is 80 +/-5 ℃, the pretreatment vehicle speed is 10 +/-1 m/min, and the pretreatment material consumption is 70-90 g/square meter.
4. The preparation method of the polyurethane synthetic leather for the sports shoes with the obvious stereoscopic effect according to claim 1 is characterized by comprising the following steps of: the ironing is implemented by six-roller heating ironing, the ironing temperature is 130-:
preparing aqueous polyurethane foaming slurry, putting raw materials except the thickening agent in a slurry formula into a container according to the formula proportion, uniformly stirring by using a dispersing stirrer, filtering, and adding the thickening agent to adjust the viscosity; the aqueous polyurethane foaming slurry is foamed by a foaming machine and then coated on base cloth, the foaming multiplying power is 2.2-4.2 times, and the coating amount is 600-1200 g/m.
5. The preparation method of the polyurethane synthetic leather for the sports shoes with the obvious stereoscopic effect according to claim 1 is characterized by comprising the following steps of: the temperature of the middle drying oven is 80 +/-5 ℃, 90 +/-5 ℃, 100 +/-5 ℃ and 110 +/-5 ℃, the blast air is 10 +/-5 Hz, 15 +/-5 Hz, 20 +/-5 Hz and 20 +/-5 Hz respectively, the coating speed is controlled to be 10 +/-1 m/min, the length of the drying oven is 15m, the transfer guide roller is a preheating roller, the temperature of the preheating roller is 110 +/-5 ℃, the embossing roller is a hexagonal tapered roller, the temperature of the embossing roller is 120 +/-10 ℃, the embossing roller is laminated to be 50-70% of the thickness of the semi-finished leather, and the embossing speed is 10 +/-1 m/min.
6. The preparation method of the polyurethane synthetic leather for the sports shoes with the obvious stereoscopic effect according to claim 1 is characterized by comprising the following steps of: the temperature of the final oven is 120 +/-5 ℃, 130 +/-5 ℃ and 130 +/-5 ℃, the coating speed is controlled to be 10 +/-1 m/min, the total air blast is 35 +/-5 Hz, and the length of the oven is 30 m.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Application publication date: 20210108 |