Matte golden oil, coating, sneaker and preparation method of sneaker

Abstract

The invention relates to matte golden oil, a coating, sports shoes and a preparation method of the matte golden oil. The matte golden oil is prepared from the following components in percentage by weight: 57.7 to 72.2 percent of self-extinction waterborne polyurethane, 20 to 30 percent of hot-melt waterborne polyurethane, 1 to 2 percent of coalescing agent and 2 to 3 percent of extinction powder. Compared with the prior art, the matte golden oil contains self-extinction waterborne polyurethane and hot-melt waterborne polyurethane and has a smooth surface, a good matte effect (glossiness is smaller than or equal to 10 GU) and bending resistance (bending resistance is larger than or equal to 50000 times). And roughing treatment is not needed before the coating is bonded with the shoe sole, only heating is needed before bonding, the hot-melt waterborne polyurethane in the golden oil is directly bonded with the shoe sole after being activated, and the coating and the shoe sole have good adhesion (the adhesive force is larger than or equal to 2.5 N / mm).

Description

Technical Field

[0001] The present application relates to the field of footwear manufacturing, and in particular to a matte gold oil, a coating, a sports shoe and a preparation method thereof. Background Art

[0002] Matte footwear has been popular in the fashion industry in recent years due to its low-key gloss. Traditional matte coatings rely on physical matting agents (such as silica, alumina) or chemical matting resins to achieve low gloss (≤10GU) by scattering light through the surface micro-rough structure. However, the matting agent has poor interface bonding with the resin matrix of the coating itself, which can easily cause stress concentration, increase the brittleness of the coating, and reduce the flexural resistance. In addition, if the matting agent is not evenly applied, there is a risk of particle agglomeration.

[0003] In addition, the traditional method of preparing matte shoes is to use matte gold oil to fully coat the surface of the shoe body, and then glue the shoe body and the sole. However, due to the low polarity of the surface of the traditional matte coating, if you want to fit it with the sole, you need to roughen the coating on the bottom edge of the shoe body before you can stick it to the sole, otherwise it will easily cause the embarrassing situation of the shoe body and the sole separating. This operation affects production efficiency, and the roughening of the edge may cause problems such as missed or over-applying, resulting in glue separation or cracks.

[0004] At the same time, the roughening process generates a large amount of dust and waste abrasives, which requires a complex recycling system and is not in line with the trend of green manufacturing. It is also easy to cause deformation or strength loss of thin-walled or flexible substrates (such as TPU and microfiber). Summary of the invention

[0005] In view of the above problems, the present application provides a matte gold oil, coating, sports shoes and a preparation method thereof. The gold oil and coating contain hot-melt water-based polyurethane, the coating does not need to be roughened, the shoe body and the sole are bonded without glue, and the shoe body coating is directly bonded to the sole after being heated.

[0006] The present application first provides a matte gold oil, which includes the following components in percentage by mass: 57.7-72.2wt% of self-matting waterborne polyurethane, 20-30wt% of hot-melt waterborne polyurethane, 1-2wt% of film-forming aid dodecanol ester and 2-3wt% of matting powder.

[0007] Different from the existing technology, the matte gold oil contains self-matting water-based polyurethane and hot-melt water-based polyurethane, with a smooth surface, good matte effect (gloss ≦ 10GU) and bending resistance (bending resistance ≧ 50,000 times). And the coating does not need to be roughened before bonding with the sole, only needs to be heated before bonding. The hot-melt water-based polyurethane in the gold oil is directly bonded to the sole after activation, and the coating has good adhesion to the sole (adhesion ≧ 2.5N / mm).

[0008] Furthermore, the film-forming aid is dodecyl alcohol ester. Dodecyl alcohol ester as an aid can reduce the film-forming temperature of hot-melt waterborne polyurethane, so that the matte gold oil can be dried and formed at a temperature lower than the hot-melt temperature of the hot-melt waterborne polyurethane. The film-forming temperature of the matte gold oil is 20-30°C. This temperature is lower than the hot-melt temperature of the hot-melt waterborne polyurethane, which is 60-80°C.

[0009] Furthermore, the matte gold oil also includes the following components: 0.1-0.3wt% pH regulator, 0.4%-0.5wt% silicone defoamer, 1wt% polyurethane thickener, 0.3-0.5wt% water-based leveling agent and 3-5wt% water-based slow-drying solvent.

[0010] Furthermore, the aqueous slow-drying solvent is propylene glycol.

[0011] The second aspect of the present application provides a matte coating, which is printed using the matte gold ink described in the first aspect of the present application.

[0012] Different from the existing technology, the matte coating contains self-matting water-based polyurethane and hot-melt water-based polyurethane, with a smooth surface, good matte effect (gloss ≦ 10GU) and bending resistance (bending resistance ≧ 50,000 times). And the coating does not need to be roughened before bonding with the sole, only needs to be heated before bonding. The hot-melt water-based polyurethane in the gold oil is directly bonded to the sole after activation, and the shoe body and the sole have good adhesion (adhesion ≧ 2.5N / mm).

[0013] The third aspect of the application provides a matte sports shoe, which uses the matte gold oil described in the first aspect of the application to perform matte printing on the shoe body.

[0014] Different from the prior art, the sports shoes using the matte gold oil have a smooth surface, good matte effect (glossiness ≦10GU) and bending resistance (bending resistance ≧50,000 times), and the shoe body and the sole have good adhesion (adhesion ≧2.5N / mm).

[0015] A fourth aspect of the present application provides a method for preparing matte sports shoes, the method comprising the following steps:

[0016] Preparation of matte coating: printing matte gold oil on the water-based polyurethane base of the shoe body fabric, and forming a matte coating after drying;

[0017] Bonding: The matte coating on the bottom edge of the shoe body is activated by heat at 60-80° C. and then bonded to the upper surface of the sole to obtain the sports shoes with the matte coating.

[0018] Different from the prior art, the sports shoes using the matte gold oil have a smooth surface, good matte effect (glossiness ≦10GU) and bending resistance (bending resistance ≧50,000 times). In addition, in the preparation process of sports shoes, the coating does not need to be roughened before bonding with the sole, but only needs to be heated before bonding. The hot-melt water-based polyurethane in the gold oil is directly bonded to the sole after activation, and the shoe body and the sole have good adhesion (adhesion ≧2.5N / mm).

[0019] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the written contents of the specification, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the specific implementation methods of the present application are explained below. DETAILED DESCRIPTION

[0020] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments.

[0021] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description in conjunction with the specific embodiments listed. 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 cannot be used to limit the scope of protection of the present application.

[0022] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0023] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0024] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0025] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0026] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0027] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0028] The present application first provides a matte gold oil, which includes the following components in percentage by mass: 57.7-72.2wt% of self-matting waterborne polyurethane, 20-30wt% of hot-melt waterborne polyurethane, 1-2wt% of film-forming aid dodecanol ester and 2-3wt% of matting powder.

[0029] Although the self-matting water-based polyurethane resin has a certain degree of self-matting properties, the coating surface formed has a special smooth surface effect and low surface tension. After the coating is dried, there are no active groups on the surface to connect the glue, so the glue cannot bond.

[0030] The matting agent has poor interface bonding with the resin matrix of the coating itself, which can easily cause stress concentration, resulting in increased brittleness of the coating and decreased flexural resistance. Therefore, the content of the matting agent should be controlled at 2-3wt%.

[0031] Different from the existing technology, the matte gold oil contains self-matting water-based polyurethane and hot-melt water-based polyurethane, with a smooth surface, good matte effect (gloss ≦ 10GU) and bending resistance (bending resistance ≧ 50,000 times). And the coating does not need to be roughened before bonding with the sole, only needs to be heated before bonding. The hot-melt water-based polyurethane in the gold oil is directly bonded to the sole after activation, and the coating has good adhesion to the sole (adhesion ≧ 2.5N / mm).

[0032] Furthermore, the film-forming aid is dodecyl alcohol ester. Dodecyl alcohol ester as an aid can reduce the film-forming temperature of hot-melt waterborne polyurethane, so that the matte gold oil can be dried and formed at a temperature lower than the hot-melt temperature of the hot-melt waterborne polyurethane. The film-forming temperature of the matte gold oil is 20-30°C. This temperature is lower than the hot-melt temperature of the hot-melt waterborne polyurethane, which is 60-80°C.

[0033] Furthermore, the matte gold oil also includes the following components: 0.1-0.3wt% pH regulator, 0.4%-0.5wt% silicone defoamer, 1wt% polyurethane thickener, 0.3-0.5wt% water-based leveling agent and 3-5wt% water-based slow-drying solvent.

[0034] Furthermore, the aqueous slow-drying solvent is propylene glycol.

[0035] The second aspect of the present application provides a matte coating, which is printed using the matte gold ink described in the first aspect of the present application.

[0036] Different from the existing technology, the matte coating contains self-matting water-based polyurethane and hot-melt water-based polyurethane, with a smooth surface, good matte effect (gloss ≦ 10GU) and bending resistance (bending resistance ≧ 50,000 times). And the coating does not need to be roughened before bonding with the sole, only needs to be heated before bonding. The hot-melt water-based polyurethane in the gold oil is directly bonded to the sole after activation, and the shoe body and the sole have good adhesion (adhesion ≧ 2.5N / mm).

[0037] Furthermore, the matte coating has a bending resistance of ≧50,000 times.

[0038] Furthermore, the adhesion of the matte coating is ≥2.5 N / mm. The adhesion between the matte coating and the sole is ≥2.5 N / mm, and the shoe body and the sole are not likely to be separated from each other.

[0039] Furthermore, the adhesion of the matte coating is ≧4.5 N / mm.

[0040] Furthermore, the glossiness of the matte coating is ≦10GU.

[0041] The third aspect of the present application provides a matte sports shoe, wherein the matte gold oil described in the first aspect of the present application is used to perform matte printing on the shoe body.

[0042] Different from the prior art, the sports shoes using the matte gold oil have a smooth surface, good matte effect (glossiness ≦10GU) and bending resistance (bending resistance ≧50,000 times), and the shoe body and the sole have good adhesion (adhesion ≧2.5N / mm).

[0043] A fourth aspect of the present application provides a method for preparing matte sports shoes, the method comprising the following steps:

[0044] Preparation of matte coating: printing matte gold oil on the water-based polyurethane base of the shoe body fabric, and forming a matte coating after drying;

[0045] Bonding: The matte coating on the bottom edge of the shoe body is activated by heat at 60-80° C. and then bonded to the upper surface of the sole to obtain the sports shoes with the matte coating.

[0046] Different from the prior art, the sports shoes using the matte gold oil have a smooth surface, good matte effect (glossiness ≦10GU) and bending resistance (bending resistance ≧50,000 times). In addition, in the preparation process of sports shoes, the coating does not need to be roughened before bonding with the sole, but only needs to be heated before bonding. The hot-melt water-based polyurethane in the gold oil is directly bonded to the sole after activation, and the shoe body and the sole have good adhesion (adhesion ≧2.5N / mm).

[0047] Furthermore, the sole is a polyurethane sole.

[0048] Furthermore, the drying temperature of the matte coating is controlled below 50°C.

[0049] Furthermore, the polyurethane sole is baked at 60-80°C and then immediately bonded to the matte coating. After the matte coating is bonded to the sole, it is activated by heat conduction, and the hot-melt water-based polyurethane is then adhered to the sole. This process allows the matte coating to be hot-melted and adhesive only after being bonded to the sole. Since water-based polyurethane cannot tolerate high temperatures, this process also avoids direct baking of the matte coating, which may cause deformation or blistering.

[0050] In this embodiment, the self-matting waterborne polyurethane is DSM R1010, the hot-melt waterborne polyurethane is Covestro U54, the pH adjuster is Dow Chemical Company's AMP-95, the silicone defoamer is Digo TEGO 825, the film-forming aid is Dow Chemical Company's dodecanol ester, the PU thickener is Lamberti PS166, the water-based leveling agent is BYK BYK3565, the matting powder is Degussa TS-100, and the water-based slow-drying solvent is Dow Chemical Company's propylene glycol.

[0051] Example 1: Matte gold oil and matte coating

[0052] 72.2wt% of self-matting water-based polyurethane, 20wt% of hot-melt water-based polyurethane, 0.1wt% of pH regulator, 0.4wt% of silicone defoamer, 1wt% of film-forming aid dodecyl alcohol ester, 1wt% of polyurethane thickener, 0.3wt% of water-based leveling agent, 2wt% of matting powder, and 3wt% of water-based slow-drying solvent are mixed uniformly to obtain matte gold oil.

[0053] Printing base layer: Print water-based polyurethane primer on the shoe body fabric, dry it back and forth in a drying machine at 50℃, repeat printing 7 times to form a base layer.

[0054] Printing ink layer: Print water-based polyurethane ink slurry on the base layer, dry it back and forth in a drying machine at 50°C, repeat printing 3 times to form an ink layer.

[0055] Printing matte coating: Print matte gold oil on the ink layer, dry it back and forth in a drying machine at 50℃, print once to form a matte coating.

[0056] Example 2: Matte gold oil and matte coating

[0057] The difference between Example 2 and Example 1 is that the formula of the matte gold oil in Example 2 is: 68.1wt% self-matting water-based polyurethane, 22% hot-melt water-based polyurethane, 0.3wt% pH regulator, 0.4wt% silicone defoamer, 1.5wt% film-forming aid dodecanol ester, 1wt% polyurethane thickener, 0.4wt% water-based leveling agent, 2.2wt% matting powder, and 4wt% water-based slow-drying solvent.

[0058] Example 3: Matte gold oil and matte coating

[0059] The difference between Example 3 and Example 1 is that the formula of the matte gold oil in Example 3 is: 65.7wt% self-matting water-based polyurethane, 23wt% hot-melt water-based polyurethane, 0.2wt% pH regulator, 0.5wt% silicone defoamer, 1.8wt% film-forming aid dodecanol ester, 1wt% polyurethane thickener, 0.5wt% water-based leveling agent, 2.3wt% matting powder, and 5wt% water-based slow-drying solvent.

[0060] Example 4: Matte gold oil and matte coating

[0061] The difference between Example 4 and Example 1 is that the formula of the matte gold oil in Example 4 is: 64.5wt% self-matting water-based polyurethane, 25wt% hot-melt water-based polyurethane, 0.2wt% pH regulator, 0.4wt% silicone defoamer, 2wt% film-forming aid dodecanol ester, 1wt% polyurethane thickener, 0.4wt% water-based leveling agent, 2.5wt% matting powder, and 4wt% water-based slow-drying solvent.

[0062] Example 5: Matte gold oil and matte coating

[0063] The difference between Example 5 and Example 1 is that the formula of the matte gold oil in Example 5 is: 63.1wt% self-matting water-based polyurethane, 28wt% hot-melt water-based polyurethane, 0.2wt% pH regulator, 0.4wt% silicone defoamer, 1.2wt% film-forming aid dodecanol ester, 1wt% polyurethane thickener, 0.3wt% water-based leveling agent, 2.8wt% matting powder, and 3wt% water-based slow-drying solvent.

[0064] Example 6: Matte gold oil and matte coating

[0065] The difference between Example 6 and Example 1 is that the formula of the matte gold oil in Example 6 is: 57.7wt% self-matting water-based polyurethane, 30wt% hot-melt water-based polyurethane, 0.3wt% pH regulator, 0.5wt% silicone defoamer, 2wt% film-forming aid dodecanol ester, 1wt% polyurethane thickener, 0.5wt% water-based leveling agent, 3wt% matting powder, and 5wt% water-based slow-drying solvent.

[0066] Comparative Example 1: A matte gold oil and a matte coating

[0067] The difference between Comparative Example 1 and Example 1 is that the formula of the matte gold oil in the comparative example is 91.7wt% self-matting water-based polyurethane, 0.3wt% pH regulator, 0.4wt% silicone defoamer, 1wt% film-forming aid dodecyl alcohol ester, 1wt% polyurethane thickener, 0.3wt% water-based leveling agent and 5wt% water-based slow-drying solvent.

[0068] Comparative Example 2

[0069] The difference between Comparative Example 2 and Example 1 is that the formula of the matte gold oil in Comparative Example 2 is: 48.1wt% self-matting water-based polyurethane, 40wt% hot-melt water-based polyurethane, 0.2wt% pH regulator, 0.4wt% silicone defoamer, 1wt% film-forming aid dodecanol ester, 1wt% polyurethane thickener, 0.3wt% water-based leveling agent, 5wt% matting powder, and 4wt% water-based slow-drying solvent, mixed evenly to obtain matte gold oil.

[0070] Comparative Example 3

[0071] The difference between Comparative Example 3 and Example 1 is that the formula of the matte gold oil in Comparative Example 3 is: 66wt% self-matting water-based polyurethane, 26wt% hot-melt water-based polyurethane, 0.2wt% pH adjuster, 0.4wt% silicone defoamer, 1wt% polyurethane thickener, 0.4wt% water-based leveling agent, 2wt% matting powder, 4wt% water-based slow-drying solvent, which are mixed evenly to obtain matte gold oil.

[0072] Comparative Example 4

[0073] The difference between Comparative Example 4 and Example 1 is that the formula of the matte gold oil in Comparative Example 4 is: 60.9wt% of self-matting water-based polyurethane, 27wt% of hot-melt water-based polyurethane, 0.2wt% of pH regulator, 0.5wt% of silicone defoamer, 4wt% of film-forming aid dodecyl alcohol ester, 1wt% of polyurethane thickener, 0.4wt% of water-based leveling agent, 2wt% of matting powder, and 4wt% of water-based slow-drying solvent are mixed uniformly to obtain matte gold oil.

[0074] Performance Testing:

[0075] The matte coatings prepared in the examples and comparative examples were tested for appearance, glossiness, and bending resistance.

[0076] After the PU strip is baked at 60-80°C for 1 minute, the matte coating is immediately laminated and bonded to the PU strip to obtain a bonded coating. The bonded coating is subjected to an adhesion test.

[0077] The results of the above tests are shown in the following table:

[0078] Table 1 Coating performance test table

[0079]

[0080] 1. Appearance inspection method: visual inspection

[0081] 2. Adhesion test method: in accordance with GB / T 5210-2006

[0082] 3. Glossiness test method: in accordance with GB / T 9754-2015

[0083] 4. Bending test method: in accordance with GB / T3903.1-1994

[0084] In Comparative Example 1, due to the absence of hot-melt waterborne polyurethane, the matte coating had insufficient adhesion to the sole, tearing occurred, and the matte coating was separated from the matte connection when the tensile value of the adhesion test reached 1.2 N / mm. In the embodiment and comparative examples 2-4, due to the addition of hot-melt waterborne polyurethane, there was no cracking at the matte surface, but the bonding between the base layer and the fabric surface was separated, but all met the requirement of tensile value ≥ 2.5 N / mm, and even reached ≥ 4.5 N / mm.

[0085] In Comparative Example 2, the content of self-matting waterborne polyurethane is low, while that of hot-melt waterborne polyurethane is high. To ensure glossiness, the content of matting powder is high, resulting in decreased bending resistance. Comparative Example 3 has bright spots on the surface. This is due to the poor film-forming property of hot-melt waterborne polyurethane. The film-forming agent is not added, resulting in incomplete film-forming, which exposes the bottom ink layer. Comparative Example 4 has a non-dry surface due to the excessive content of film-forming agent. This is because the amount of film-forming agent added is too large, which increases the boiling point of the gold oil and makes it impossible to dry at normal drying temperature.

[0086] The matte coating provided by the technical solution contains self-matting waterborne polyurethane and hot-melt waterborne polyurethane, and the matte gold oil contains self-matting waterborne polyurethane and hot-melt waterborne polyurethane, with a smooth surface, good matte effect (gloss ≦ 6GU) and bending resistance (bending resistance ≧ 50,000 times). The coating does not need to be roughened before bonding to the sole, but only needs to be heated before bonding. The hot-melt waterborne polyurethane in the gold oil is directly bonded to the sole after activation, and the coating has good adhesion to the sole (adhesion ≧ 4.5N / mm).

[0087] Finally, it should be noted that although the above embodiments have been described in the text of the specification of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the text of the specification of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A matte gold oil, characterized in that: The matte gold oil comprises the following components: 57.7-72.2wt% of self-matting waterborne polyurethane, 20-30wt% of hot-melt waterborne polyurethane, 1-2wt% of film-forming aid and 2-3wt% of matting powder.

2. The matte gold oil according to claim 1, characterized in that: The film-forming aid is dodecyl alcohol ester.

3. The matte gold oil according to claim 1, characterized in that: The matte gold oil also includes the following components: 0.1-0.3wt% pH regulator, 0.4%-0.5wt% organosilicon defoamer, 1wt% polyurethane thickener, 0.3-0.5wt% water-based leveling agent and 3-5wt% water-based slow-drying solvent.

4. The matte gold oil according to claim 3, characterized in that: The aqueous slow-drying solvent is propylene glycol.

5. A matte coating, characterized in that: The matte coating is printed using the matte gold ink described in claim 1.

6. The matte coating according to claim 5, characterized in that: The matte coating has a bending resistance of ≧50,000 times.

7. The matte coating according to claim 5, characterized in that: The adhesion of the matte coating is ≧2.5 N / mm.

8. The matte coating according to claim 5, characterized in that: The glossiness of the matte coating is ≦10GU.

9. A matte sports shoe, characterized in that: The sports shoes are subjected to matte printing on the shoe body by using the matte gold oil described in claim 1.

10. The method for preparing matte surface sports shoes according to claim 9, characterized in that: The preparation method comprises the following steps: Preparation of matte coating: printing matte gold oil on the water-based polyurethane base of the shoe body fabric, and forming a matte coating after drying; Bonding: The matte coating on the bottom edge of the shoe body is activated by heat at 60-80° C. and then bonded to the upper surface of the sole to obtain the sports shoes with the matte coating.

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