CN115613369B - Heat-resistant polyurethane vamp coating, heat-resistant polyurethane coating vamp and preparation method thereof - Google Patents
Heat-resistant polyurethane vamp coating, heat-resistant polyurethane coating vamp and preparation method thereof Download PDFInfo
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- CN115613369B CN115613369B CN202211286838.2A CN202211286838A CN115613369B CN 115613369 B CN115613369 B CN 115613369B CN 202211286838 A CN202211286838 A CN 202211286838A CN 115613369 B CN115613369 B CN 115613369B
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 60
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 59
- 239000011527 polyurethane coating Substances 0.000 title claims abstract description 48
- 238000000576 coating method Methods 0.000 title claims abstract description 45
- 239000011248 coating agent Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000007639 printing Methods 0.000 claims abstract description 57
- 238000007731 hot pressing Methods 0.000 claims abstract description 37
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 31
- 238000007650 screen-printing Methods 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 42
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 21
- 238000000465 moulding Methods 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 11
- 239000000080 wetting agent Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 238000007603 infrared drying Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 15
- 230000008569 process Effects 0.000 description 12
- 238000004132 cross linking Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000012948 isocyanate Substances 0.000 description 7
- 150000002513 isocyanates Chemical class 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 230000009257 reactivity Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 229920001228 polyisocyanate Polymers 0.000 description 3
- 239000005056 polyisocyanate Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- PXAJQJMDEXJWFB-UHFFFAOYSA-N acetone oxime Chemical compound CC(C)=NO PXAJQJMDEXJWFB-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910002011 hydrophilic fumed silica Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- -1 polydimethylsiloxane Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical group 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
- 238000004383 yellowing 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
-
- 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
- D06N2203/00—Macromolecular materials of the coating layers
- D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06N2203/068—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
- D06N2211/00—Specially adapted uses
- D06N2211/10—Clothing
- D06N2211/106—Footwear
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The invention relates to a hot-pressing-resistant polyurethane vamp coating, which comprises the following components in percentage by mass: 70-85% of aqueous polyurethane, 5-10% of end-capping cross-linking agent, 4-8% of fumed silica and 5-15% of aqueous auxiliary agent. A polyurethane coating vamp with hot pressing resistance and a preparation method thereof comprise the following steps: pretreatment, primary printing, secondary printing and hot press forming. The polyurethane coating is firmly adhered to the whole vamp material and forms a polyurethane plane, the multi-screen printing is performed on the polyurethane coating formed by the whole vamp, and the preset part presents a pattern with a certain thickness. The coating film formed at the same time is tougher and has the property of being not easy to deform at high temperature.
Description
Technical Field
The invention relates to the field of shoe preparation, in particular to a hot-pressing-resistant polyurethane vamp coating, a hot-pressing-resistant polyurethane coating vamp and a preparation method thereof.
Background
At present, in the preparation of shoes, the aqueous PU slurry is often used for pre-treating the shoe materials, and then a TPU hot pressing process is adopted for forming, so that the strength, the toughness, the wear resistance, the water resistance and the like of the vamp can be increased by TPU hot pressing. However, in the production process, due to the self-properties of the slurry, the hot pressing temperature exceeds 150 ℃ and the hot pressing deformation of the slurry coating is easy to occur, and the conditions of melting of the coating, deformation of the coating or hardening of the coating can occur. Meanwhile, the polyurethane coating pattern is printed on the screen surface, and as the polyurethane coating is a convex part with a certain thickness, the edge of the coating is often stripped and broken in the subsequent use process, and the polyurethane coating is detached from the screen surface.
Disclosure of Invention
In view of the foregoing, the present application provides hot-press resistant polyurethane vamp coatings, hot-press resistant polyurethane coated vamps and methods of making the same. The heat-resistant polyurethane vamp paint can be used at 165 ℃ and 20Kg/cm 2 After 180s under the pressure of (2) the coating will not deform and meltOr too hard, the coating thickness remains above 90%. The vamp is soft, has high bending resistance and is not easy to fall off.
The invention provides a hot-press-resistant polyurethane coating, which comprises the following components in percentage by mass: 70-85% of aqueous polyurethane, 5-10% of end-capping cross-linking agent, 4-8% of fumed silica and 5-15% of aqueous auxiliary agent.
Compared with the prior art, the heat-pressure-resistant polyurethane coating provided by the technical scheme contains the end-capping cross-linking agent, the reaction activity and the thermal stability of the polyurethane coating at high temperature are improved by adding the end-capping cross-linking agent, and the cross-linking of the polyurethane coating at high temperature is promoted, so that the formed coating film is tougher and has the property of being difficult to deform at high temperature.
In certain embodiments, the aqueous adjuvant comprises the following components in parts by mass: 1-5 parts of water wetting agent, 1-5 parts of water defoaming agent and 1-5 parts of leveling agent.
The second aspect of the invention provides a printing method of a heat-resistant polyurethane coating vamp, comprising the following steps:
pretreatment: adding 5-10wt% of deblocking agent into the hot-pressing-resistant polyurethane coating to obtain working slurry;
first printing: printing working slurry on the mesh cloth by using the whole panel and drying;
and (3) secondary printing: carrying out multiple screen printing on a preset part of the dried first printing coating by using a screen, and drying after each screen printing;
hot press molding: and hot-pressing the vamp subjected to the secondary printing and drying to obtain the vamp with the thickness of the heat-resistant polyurethane coating at the preset part of 0.7-1.2 mm.
In research and development, the prior art directly prints polyurethane patterns on screen cloth by using a screen plate, and as the screen cloth material and polyurethane have larger difference, the edges of the raised heat-resistant polyurethane coating can be caused to form large-angle water drop angles, and the edges are easy to tear in the later use process.
Compared with the prior art, the printing method of the heat-resistant polyurethane coating vamp provided by the technical scheme combines full-face plate and screen printing, the full-face plate is adopted to ensure that polyurethane coating is firmly adhered to the whole vamp material and forms a polyurethane plane, the multi-screen printing is performed on the polyurethane coating formed by the full-face plate, and the preset part presents a pattern with a certain thickness, so that the connection between the protruded polyurethane pattern and the vamp is firmer. Meanwhile, the coating contains the end-capping cross-linking agent, and the addition of the end-capping cross-linking agent improves the reactivity and the thermal stability of the polyurethane coating at high temperature, promotes the cross-linking of the polyurethane coating at the final hot-press forming step, so that the formed coating film is tougher and has the property of being difficult to deform at high temperature.
In some embodiments, the first printing step, the drying is performed by using a running table dryer, the set temperature of the dryer is 50-80 ℃, and the moving speed of the dryer is 100-200mm/s.
In some embodiments, the secondary printing step is performed by infrared drying at 60-70deg.C at a drying rate of 80M/min or more.
In certain embodiments, the secondary printing step, the mesh size of the screen is 60 mesh.
In some embodiments, the hot press molding step is performed at a hot press temperature of 160-165℃and a pressure of 15-20Kg/cm 2 。
In certain embodiments, the operating time of the first printing, the second printing and the hot press forming is controlled to be 2-4 hours.
In a third aspect, the present invention provides a heat resistant polyurethane coated upper made by the method of the second aspect of the present invention.
Compared with the prior art, the heat-resistant polyurethane coating vamp provided by the technical scheme is prepared by adopting the process of combining the whole surface plate and the screen printing, the whole surface plate is adopted to ensure that the polyurethane coating is firmly adhered on the whole vamp material and forms a polyurethane plane, the multi-screen printing is to carry out screen printing on the polyurethane coating formed by the whole surface plate, and the preset part presents a pattern with a certain thickness, so that the preset pattern is more firmly connected with the vamp. Meanwhile, the coating contains the end-capping cross-linking agent, and the addition of the end-capping cross-linking agent improves the reactivity and the thermal stability of the polyurethane coating at high temperature, promotes the cross-linking of the polyurethane coating at the final hot-press forming step, so that the formed coating film is tougher and has the property of being difficult to deform at high temperature.
In some embodiments, the number of bends of the hot-press resistant polyurethane coated vamp is greater than or equal to 50000.
The foregoing summary is merely an overview of the present application, and is provided to enable one of ordinary skill in the art to make and use the present application and to enable one of ordinary skill in the art to make and use the present application.
Detailed Description
In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in detail with reference to specific embodiments.
In order to describe the possible application scenarios, technical principles, practical embodiments, and the like of the present application in detail, the following description is made with reference to the specific embodiments listed below. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples and are not intended to limit the scope of protection of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in the embodiments may be combined in any manner to form a corresponding implementable technical solution.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains; the use of related terms herein is for the description of specific embodiments only and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a representation for describing a logical relationship between objects, which means that there may be three relationships, e.g., a and/or B, representing: there are three cases, a, B, and both a and B. In addition, the character "/" herein generally indicates that the front-to-back associated object is an "or" logical relationship.
In this application, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.
Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this application is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.
As in the understanding of the "examination guideline," the expressions "greater than", "less than", "exceeding", and the like are understood to exclude the present number in this application; the expressions "above", "below", "within" and the like are understood to include this number. Furthermore, in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of groups", "a plurality of" and the like, unless specifically defined otherwise.
In the application, the blocking cross-linking agent is a blocked water-dispersible polyisocyanate curing agent, and the blocked water-dispersible polyisocyanate curing agent can be matched with a matched deblocking agent under the condition of high temperature to obtain the polyisocyanate curing agent. The NCO groups of the isocyanate curing agent are generally blocked by phenol, methanol, ethanol, acetone oxime, caprolactam, sodium bisulphite and the like, so that the blocked isocyanate curing agent is obtained, and the NCO groups are unblocked after the deblocking agent is added under the heating condition.
In this application, the deblocking agent is a polyol, preferably propylene glycol.
In this embodiment, the isocyanate curing agent preferably contains a cyclic or branched isocyanate. Because the cyclic structural units or the branching is high, the polyurethane can form a cross-linking density structure with higher degree, and the effect of heat and pressure resistance is further enhanced. Under the action of high temperature, the blocked isocyanate deblocking agent is matched with the deblocking agent, NCO groups are deblocked and are connected with polyurethane hydroxyl groups to form high-density crosslinking reaction, so that the effect of heat pressure resistance is enhanced.
The formation of the working paste, as well as the curing initiation time, can be controlled by the use of a blocked isocyanate curing agent in the present application. The production problems that the working slurry forms a cured high-density crosslinking structure during printing, the printing effect is affected, the screen printing plate is blocked and the like due to the fact that the isocyanate curing agent is directly added in the batching process are solved.
The invention provides a hot-press-resistant polyurethane coating, which comprises the following components in percentage by mass: 70-85% of aqueous polyurethane, 5-10% of end-capping cross-linking agent, 4-8% of fumed silica and 5-15% of aqueous auxiliary agent.
Compared with the prior art, the heat-pressure-resistant polyurethane coating provided by the technical scheme contains the end-capping cross-linking agent, the reaction activity and the thermal stability of the polyurethane coating at high temperature are improved by adding the end-capping cross-linking agent, and the cross-linking of the polyurethane coating at high temperature is promoted, so that the formed coating film is tougher and has the property of being difficult to deform at high temperature.
In certain embodiments, the mass ratio of the aqueous polyurethane to the blocked cross-linking agent is from 70 to 80:4-5. In research and development, the hot-pressing resistance can be improved along with the increase of the end-capping cross-linking agent, but after the addition amount of the end-capping cross-linking agent reaches a certain value, the hot-pressing resistance is not obviously improved, and the effective construction time of the working solution is shortened. Thus, the amount of blocked crosslinker added is controlled.
In certain embodiments, the mass ratio of the aqueous polyurethane to fumed silica is from 70 to 80:4 to 6. The silicon dioxide is added for modification, so that the temperature resistance of the coating can be improved, and the surface of the prepared coating is better in dryness, softer and improved in bending resistance. Too much silica is added to cause hardening of the coating film, so that the amount thereof is controlled.
In certain embodiments, the aqueous adjuvant comprises the following components in parts by mass: 1-5 parts of water wetting agent, 1-5 parts of water defoaming agent and 1-5 parts of leveling agent.
The second aspect of the invention provides a printing method of a heat-resistant polyurethane coating vamp, comprising the following steps:
pretreatment: adding 5-10wt% of deblocking agent into the hot-pressing-resistant polyurethane coating to obtain working slurry;
first printing: printing working slurry on the mesh cloth by using the whole panel and drying;
and (3) secondary printing: carrying out multiple screen printing on a preset part of the dried first printing coating by using a screen, and drying after each screen printing;
hot press molding: and (3) hot-pressing the vamp subjected to the secondary printing to obtain the vamp with the thickness of the heat-resistant polyurethane coating at the preset part of 0.7-1.2 mm.
The inventor finds in the study that the prior art directly prints polyurethane patterns on the mesh cloth by using the screen plate, and the large-angle water drop angle appears at the edge of the raised heat-resistant polyurethane coating due to the large material difference between the mesh cloth and polyurethane, so that the edge is easy to tear in the later use process.
Compared with the prior art, the printing method of the heat-resistant polyurethane coating vamp provided by the technical scheme combines full-face plate and screen printing, and the full-face plate is adopted to ensure that the polyurethane coating is firmly adhered to the whole vamp material and forms a polyurethane plane; and the multi-screen printing is to perform screen printing on a polyurethane coating formed by the whole screen, so that a preset part presents a pattern with a certain thickness. The process enables the polyurethane coating to be connected with the vamp more firmly. Meanwhile, the coating contains the end-capping cross-linking agent, and the addition of the end-capping cross-linking agent improves the reactivity and the thermal stability of the polyurethane coating at high temperature, promotes the cross-linking of the polyurethane coating at the final hot-press forming step, so that the formed coating film is tougher, is formed quickly, and has the property of being difficult to deform at high temperature.
In some embodiments, the first printing step, the drying is performed by using a running table dryer, the set temperature of the dryer is 50-80 ℃, and the moving speed of the dryer is 100-200mm/s.
In some embodiments, the secondary printing step is performed by infrared drying at 60-70deg.C at a drying rate of 80M/min or more.
The first printing and the second printing adopt a relatively low-temperature drying mode below 80 ℃, so that the heat-resistant polyurethane printed each time is not solidified, but a relatively stable coating film is formed, and the polyurethane covered by the next working procedure can be overlapped on the surface of the polyurethane and can reach a certain thickness.
In certain embodiments, the secondary printing step, the mesh size of the screen is 60 mesh. The number of screens is selected in relation to the viscosity of the working fluid and the molecular weight of its components contained therein.
In some embodiments, the hot press molding step is performed at a hot press temperature of 160-165℃and a pressure of 15-20Kg/cm 2 Can realize high-temperature rapid hot press molding. In the prior art, due to the property of slurry, the hot pressing temperature can only reach 130 ℃ and the hot pressing pressure is 5Kg/cm 2 In the following, this results in a relatively long hot press molding time for the upper, with the polyurethane coating being susceptible to deformation.
In certain embodiments, the operating time of the first printing, the second printing and the hot press forming is controlled to be 2-4 hours. Since the working fluid is added to the deblocking agent, it is necessary to control the operation time.
In a third aspect, the present invention provides a heat resistant polyurethane coated upper made by the method of the second aspect of the present invention.
Compared with the prior art, the heat-resistant polyurethane coating vamp provided by the technical scheme is prepared by adopting the process of combining the whole surface plate and the screen printing, the whole surface plate is adopted to ensure that the polyurethane coating is firmly adhered on the whole vamp material and forms a polyurethane plane, the multi-screen printing is to carry out screen printing on the polyurethane coating formed by the whole surface plate, and the preset part presents a pattern with a certain thickness, so that the preset pattern is more firmly connected with the vamp. Meanwhile, the coating contains the end-capping cross-linking agent, and the addition of the end-capping cross-linking agent improves the reactivity and the thermal stability of the polyurethane coating at high temperature, promotes the cross-linking of the polyurethane coating at the final hot-press forming step, so that the formed coating film is tougher and has the property of being difficult to deform at high temperature.
In some embodiments, the number of bends of the hot-press resistant polyurethane coated vamp is greater than or equal to 50000. Because the process uses the combination of the whole surface plate and the screen printing, the stress of the local bending area can be effectively decomposed and transferred to the whole vamp area, and the breakage caused by overlarge local stress is avoided.
Finally, it should be noted that, although the foregoing embodiments have been described in the text of the present application, the scope of the patent protection of the present application is not limited thereby. All technical schemes generated by replacing or modifying equivalent structures or equivalent processes based on the essential idea of the application and by directly or indirectly implementing the technical schemes of the embodiments in other related technical fields and the like are included in the patent protection scope of the application.
In the embodiment, the selected modified aqueous polyurethane is kechuang 1554, and the resin is prepared by modifying the aqueous polyurethane in the traditional shoe slurry.
In this embodiment, the blocking crosslinking agent Imprafix 2794 is used as a crosslinking agent for improving the reactivity and thermal stability (yellowing), and can be simultaneously added when preparing a slurry by deblocking reaction at high temperature.
In the embodiment, the selected aqueous wetting agent is BYK-346, the chemical component of the aqueous wetting agent is polyether modified polydimethylsiloxane solution, and the aqueous wetting agent is an organosilicon surfactant for an aqueous system, so that the surface tension is reduced strongly, and the wetting performance of a substrate is improved obviously.
In the embodiment, the water-based defoamer is digao 825, which is an organosilicon defoamer, does not contain VOC, has good defoaming performance, and does not affect the transparency.
In the embodiment, the silica is selected from Desoxhlet company model A200 with specific surface area of 200+ -25 m 2 And/g, the primary particle size is 12nm, and the silica is hydrophilic fumed silica, and has the characteristics of good dispersibility, good thickening effect, high transparency, good weather resistance and the like.
In this embodiment, the screen printing plate needs to be cleaned after each printing step is completed.
In this embodiment, the preparation of the hot-pressing resistant polyurethane vamp coating comprises the following steps: adding aqueous polyurethane, a blocking cross-linking agent, fumed silica and an aqueous auxiliary agent into a dispersing cylinder according to a proportion, and dispersing by a high-speed dispersing machine; and (5) carrying out post-grinding on the dispersed slurry by a three-roller grinder, and then sub-packaging and discharging.
In the embodiment, the aqueous auxiliary agent is prepared from the following components in parts by mass: 5 parts by mass of an aqueous wetting agent, 5 parts by mass of an aqueous defoaming agent and 5 parts by mass of a leveling agent.
Example 1:
coating configuration: adding 80% of modified waterborne polyurethane (Korskier 1554), 5% of end-capped cross-linking agent (Imprafix 2794), 5% of fumed silica (Desoxhlet A200) and 10% of waterborne auxiliary agent (5 parts by mass of waterborne wetting agent, 5 parts by mass of waterborne defoaming agent and 5 parts by mass of leveling agent) into a dispersing cylinder according to a proportion, and dispersing by using a high-speed dispersing machine; the dispersed slurry is subjected to post-grinding by a three-roller grinder and then split charging and discharging are carried out, so that the hot-pressing-resistant polyurethane vamp coating is obtained;
pretreatment: adding 5wt% of a propylene glycol deblocking agent into the hot-pressing resistant polyurethane vamp coating, and uniformly stirring to obtain working slurry;
first printing: printing paste on the mesh cloth by adopting the whole panel, and drying; the drying is carried out by adopting a running table dryer for drying, the set temperature of the dryer is 70 ℃, and the movement speed of the dryer is 200mm/s
And (3) secondary printing: 5 screen printing is carried out on a preset position by adopting a screen, and each screen printing is dried; the drying adopts infrared drying, the drying temperature is 60-70 ℃, and the drying speed is more than or equal to 80M/min;
hot press molding: hot-pressing the vamp after the secondary printing and drying at 165 ℃ under 20Kg/cm 2 The upper of example 1 was obtained by hot pressing for 45 s.
Example 2:
coating configuration: adding 75% of aqueous polyurethane (Korskier 1554), 10% of end-capped cross-linking agent (Imprafix 2794), 5% of fumed silica (Desoxhlet A200) and 10% of aqueous auxiliary agent (5 parts by mass of aqueous wetting agent, 5 parts by mass of aqueous defoaming agent and 5 parts by mass of leveling agent) into a dispersing cylinder according to a proportion, and dispersing by using a high-speed dispersing machine; the dispersed slurry is subjected to post-grinding by a three-roller grinder and then split charging and discharging are carried out, so that the hot-pressing-resistant polyurethane vamp coating is obtained
Pretreatment: adding 10wt% of a propylene glycol deblocking agent into the hot-pressing resistant polyurethane vamp coating, and uniformly stirring to obtain working slurry;
first printing: printing paste on the mesh cloth by adopting the whole panel, and drying; the drying is carried out by adopting a running table dryer for drying, the set temperature of the dryer is 70 ℃, and the movement speed of the dryer is 200mm/s
And (3) secondary printing: 5 screen printing is carried out on a preset position by adopting a screen, and each screen printing is dried; the drying adopts infrared drying, the drying temperature is 60-70 ℃, and the drying speed is more than or equal to 80M/min;
hot press molding: hot-pressing the vamp after the secondary printing and drying at 165 ℃ under 20Kg/cm 2 The upper of example 2 was obtained by hot pressing for 45 s.
Example 3
Coating configuration: adding 80% of aqueous polyurethane (40% of Korskier 1554 and 40% of Heben 339A), 5% of end-capped cross-linking agent (Imprafix 2794), 5% of fumed silica (Desoxhlet A200) and 10% of aqueous auxiliary agent (5 parts by mass of aqueous wetting agent, 5 parts by mass of aqueous defoaming agent and 5 parts by mass of leveling agent) into a dispersing cylinder according to a proportion, and dispersing by using a high-speed dispersing machine; the dispersed slurry is subjected to post-grinding by a three-roller grinder and then split charging and discharging are carried out, so that the hot-pressing-resistant polyurethane vamp coating is obtained
Pretreatment: adding 5wt% of a propylene glycol deblocking agent into the hot-pressing resistant polyurethane vamp coating, and uniformly stirring to obtain working slurry;
first printing: printing paste on the mesh cloth by adopting the whole panel, and drying; the drying is carried out by adopting a running table dryer for drying, the set temperature of the dryer is 70 ℃, and the movement speed of the dryer is 200mm/s
And (3) secondary printing: 5 screen printing is carried out on a preset position by adopting a screen, and each screen printing is dried; the drying adopts infrared drying, the drying temperature is 60-70 ℃, and the drying speed is more than or equal to 80M/min;
hot press molding: hot-pressing the vamp after the secondary printing and drying at 165 ℃ under 20Kg/cm 2 The upper of example 3 was obtained by hot pressing for 45 s.
Example 4
Coating configuration: adding 80% of aqueous polyurethane (Heben 339A), 5% of end-capped cross-linking agent (Imprafix 2794), 5% of fumed silica (Desoxhlet A200) and 10% of aqueous auxiliary agent (5 parts by mass of aqueous wetting agent, 5 parts by mass of aqueous defoaming agent and 5 parts by mass of leveling agent) into a dispersing cylinder according to a proportion, and dispersing by using a high-speed dispersing machine; the dispersed slurry is subjected to post-grinding by a three-roller grinder and then split charging and discharging are carried out, so that the hot-pressing-resistant polyurethane vamp coating is obtained
Pretreatment: adding 5wt% of a propylene glycol deblocking agent into the hot-pressing resistant polyurethane vamp coating, and uniformly stirring to obtain working slurry;
first printing: printing paste on the mesh cloth by adopting the whole panel, and drying; the drying is carried out by adopting a running table dryer for drying, the set temperature of the dryer is 70 ℃, and the movement speed of the dryer is 200mm/s
And (3) secondary printing: 5 screen printing is carried out on a preset position by adopting a screen, and each screen printing is dried; the drying adopts infrared drying, the drying temperature is 60-70 ℃, and the drying speed is more than or equal to 80M/min;
hot press molding: hot-pressing the vamp after the secondary printing and drying at 165 ℃ under 20Kg/cm 2 The upper of example 4 was obtained by hot pressing for 45 s.
The hot-press resistant polyurethane vamp coatings and vamps prepared in examples 1-4 were subjected to performance tests, test items and test results are shown in table 1 below:
table 1 examples 1-4 test results table
(Heat and pressure resistance test description, comparison of thickness before and after the hot pressing step.)
It can be seen from examples 1 to 4 that the kind of aqueous polyurethane and the amount of the end-capping cross-linking agent added affect the heat and pressure resistance of the coated upper and the working fluid working time. In this embodiment, the aqueous polyurethane is preferably a modified aqueous polyurethane of kechuang 1554, the blocking cross-linking agent is Imprafix 2794, and the mass ratio of the aqueous polyurethane to the blocking cross-linking agent is preferably 80:5.
Claims (8)
1. The preparation method of the polyurethane coated vamp with the hot-pressing resistance is characterized by comprising the following steps of: pretreatment: adding 5-10wt% of deblocking agent into the heat-resistant polyurethane vamp coating, and uniformly stirring to obtain working slurry;
first printing: printing working slurry on the mesh cloth by using the whole panel and drying;
and (3) secondary printing: carrying out multiple screen printing on a preset part of the dried first printing coating by using a screen, and drying after each screen printing;
hot press molding: carrying out hot pressing on the vamp subjected to the secondary printing to obtain a vamp with the thickness of the preset part of the heat-resistant polyurethane coating of 0.7-1.2 mm;
the hot-pressing-resistant polyurethane vamp coating comprises the following components in percentage by mass: 70-85% of waterborne polyurethane, 5-10% of end-capping cross-linking agent, 4-8% of fumed silica and 5-15% of waterborne auxiliary agent; the aqueous polyurethane is kesi 1554, and the end-capping cross-linking agent is Imprafix 2794; the aqueous auxiliary agent comprises the following components in parts by mass: 1-5 parts of water wetting agent, 1-5 parts of water defoaming agent and 1-5 parts of leveling agent.
2. The method according to claim 1, wherein the first printing step is drying by using a treadmill dryer, the dryer is set to a temperature of 50-80 ℃ and the movement speed of the dryer is 100-200mm/s.
3. The method according to claim 1, wherein the secondary printing step is performed by infrared drying at 60-70deg.C at a drying speed of 80M/min or more.
4. The method of claim 1, wherein the secondary printing step, the screen mesh is 60 mesh.
5. The method according to claim 1, wherein the hot press molding step has a hot press temperature of 160 ℃ to 165 ℃ and a pressure of 15 Kg/cm to 20Kg/cm 2 。
6. The method according to claim 1, wherein the operation time of the first printing, the second printing and the thermo-compression molding steps is controlled to be 2-4 hours in total.
7. A hot-press resistant polyurethane coated upper, characterized in that it is produced by the method according to any one of claims 1 to 6.
8. The vamp of claim 7, wherein the heat and pressure resistant polyurethane coated vamp is folded more than or equal to 50000 times.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5552496A (en) * | 1992-08-27 | 1996-09-03 | Herberts Gesellschaft Mit Beschrankter Haftung | Aqueous polyurethane resin dispersion, processes for its preparation, and its use in aqueous coating compositions |
| CN111849326A (en) * | 2020-06-30 | 2020-10-30 | 湖南松井新材料股份有限公司 | Dual-curing water-based paint and preparation method and construction process thereof |
| WO2021110087A1 (en) * | 2019-12-05 | 2021-06-10 | 广东盈通新材料有限公司 | Latent mono-component polyurethane hot melt glue, preparation method therefor and glue film |
| CN114164681A (en) * | 2021-12-10 | 2022-03-11 | 福建华峰新材料有限公司 | Coating with 3D (three-dimensional) embossment effect, application and fabric thereof |
| CN114230764A (en) * | 2021-12-20 | 2022-03-25 | 嘉宝莉化工集团股份有限公司 | Water-based closed polyisocyanate curing agent and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8507616B2 (en) * | 2010-06-29 | 2013-08-13 | Illinois Tool Works Inc. | Halo-free heat transfer label with pigmented adhesive |
-
2022
- 2022-10-20 CN CN202211286838.2A patent/CN115613369B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5552496A (en) * | 1992-08-27 | 1996-09-03 | Herberts Gesellschaft Mit Beschrankter Haftung | Aqueous polyurethane resin dispersion, processes for its preparation, and its use in aqueous coating compositions |
| WO2021110087A1 (en) * | 2019-12-05 | 2021-06-10 | 广东盈通新材料有限公司 | Latent mono-component polyurethane hot melt glue, preparation method therefor and glue film |
| CN111849326A (en) * | 2020-06-30 | 2020-10-30 | 湖南松井新材料股份有限公司 | Dual-curing water-based paint and preparation method and construction process thereof |
| CN114164681A (en) * | 2021-12-10 | 2022-03-11 | 福建华峰新材料有限公司 | Coating with 3D (three-dimensional) embossment effect, application and fabric thereof |
| CN114230764A (en) * | 2021-12-20 | 2022-03-25 | 嘉宝莉化工集团股份有限公司 | Water-based closed polyisocyanate curing agent and preparation method and application thereof |
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