Multi-color zipper and preparation method thereof

Abstract

The invention relates to the field of clothes, in particular to a multi-color zipper and a preparation method thereof. According to the multi-color zipper provided by the invention, at least one of the accessories is made of metal, and the surface of the metal is covered with the paint layer, so that the zipper accessories present different colors from different angles; paint used by the paint layer comprises 8%-15% of mica group mineral powder; the paint is prepared from, by weight, 22%-28% of acrylic resin, 40%-46% of xylene, 5%-9% of ethylene glycol monobutyl ether, 4%-8% of isobutanol and 9%-13% of epoxy hardener. Wherein the mica group mineral powder is mixed powder 1 or mixed powder 2; wherein the mixed powder 1 is mixed powder of mica, rutile and aluminum oxide; the mixed powder 2 is mixed powder of mica, rutile, anatase and tin oxide. According to the invention, the product can show different colors at different angles, the problem of single color is overcome, a liquid medicine oxidation process is not needed for processing, and labor and resources are saved.

Description

Technical Field

[0001] The present invention relates to the field of clothing, and in particular to a multi-color zipper and a preparation method thereof. Background Art

[0002] Zippers are a type of accessory used in clothing. Zippers are essentially composed of a slider, top stop, tape, and chain elements. Metal zippers are one of the three main zipper product categories. Their high strength and striking metallic finish have long been popular in the market, making them the primary choice for outerwear and luggage. However, due to processing limitations, copper is currently the primary material used. Surface coloring of copper, however, is subject to numerous limitations due to the zipper's inherent characteristics. Consequently, a limited number of processes are suitable for metal zipper surface coloring. Consequently, metal zippers have for many years been primarily available in black, white, gold, antique silver, bronze, and rose.

[0003] Conventional metal zipper surface coloring involves chemical cleaning, surface degreasing, water rinsing, oxidation coloring (some teeth may be colored multiple times), and finally water rinsing. The chemical reaction results in a uniform surface color that remains the same from all angles. The oxidation coloring process is lengthy, requires high process control, and results in a monotonous color that can lead to customer fatigue. Summary of the Invention

[0004] In view of this, the present invention provides a multi-color zipper and a method for making the same. The multi-color zipper and method provided by the present invention can make the product display different colors at different angles, overcoming the problem of single color. Moreover, it does not require a chemical oxidation process for processing, saving labor and resources.

[0005] The present invention provides a multi-color zipper, the zipper comprising zipper accessories;

[0006] The zipper accessories include at least one of a slider, a top stop, a bottom stop, and a chain tooth;

[0007] At least one of the zipper accessories is made of metal;

[0008] The surface of the at least one zipper accessory made of metal is covered with a paint layer;

[0009] The zipper accessory covered with the paint layer presents different colors from different angles;

[0010] The different colors displayed from different angles are produced by a continuous layer of paint covering the surface of the zipper accessory.

[0011] Preferably, the metal surface does not need to be subjected to an oxidation process before the paint layer is applied to the surface of the at least one zipper accessory made of metal.

[0012] Preferably, the paint layer comprises, by mass percentage:

[0013]

[0014] in,

[0015] The mica mineral powder is mixed powder 1 or mixed powder 2; wherein, the mixed powder 1 is a mixed powder of mica, rutile and alumina; the mixed powder 2 is a mixed powder of mica, rutile, anatase and tin oxide.

[0016] Preferably, the average particle size of the mica mineral powder is 10 to 60 μm.

[0017] Preferably, in terms of mass percentage, the contents of the components in the mixed powder 1 are as follows:

[0018] Mica: 60% to 80% and not including 80%;

[0019] Rutile: 5% to 25% and excluding 25%;

[0020] Alumina: 5% to 25% and excluding 25%;

[0021] In terms of mass percentage, the contents of the components in the mixed powder 2 are as follows:

[0022] Mica: 60% to 80% and not including 80%;

[0023] Rutile: 5% to 25% and excluding 25%;

[0024] Anatase: 5% to 25% and excluding 25%;

[0025] Alumina: 5% to 25% (excluding 25%).

[0026] Preferably, the acrylic resin

[0027] It is WX-2032;

[0028] The epoxy curing agent is BH-140.

[0029] Preferably, the paint used to form the paint layer is prepared by the following preparation method:

[0030] S101, mixing acrylic resin, xylene, ethylene glycol monobutyl ether, isobutyl alcohol and epoxy curing agent to obtain a mixed solution;

[0031] S102, mixing mica mineral powder with the mixed solution obtained in step S101 to obtain paint.

[0032] The present invention also provides a method for preparing the multi-color zipper described in the above technical solution, comprising the following steps:

[0033] S201, putting the zipper stack into the oven for ironing, so that the zipper tooth tape is in a straight state;

[0034] S202, using paint to color and bake the front side of the zipper elements obtained in step S101, and then using paint to color and bake the back side of the zipper elements;

[0035] S203, separating the two side chain elements of the zipper obtained in step S202, painting the slider of the zipper with paint, and then baking it, and then merging the separated two side chain elements to form the initial assembled shape to obtain the zipper.

[0036] Preferably, in step S201, the ironing temperature is 105-115°C and the ironing time is 5-6 minutes;

[0037] In step S202, the baking temperature is 110-130°C and the baking time is 7-10 minutes;

[0038] In step S203, the baking temperature is 110-130° C. and the baking time is 7-10 minutes.

[0039] Preferably, in step S202, the coloring process includes: soaking the lower part of the paint wheel in the paint in the paint box so that the paint adheres to the surface of the paint wheel, and the zipper above the paint wheel drives the paint wheel to rub against the paint wheel so as to bring the lower paint upward so that the paint adheres to the zipper teeth, and then continuing to color the zipper teeth through the subsequent paint wheel to form surface protection.

[0040] The present invention provides a multi-color zipper and a method for making the same. The multi-color zipper provided by the present invention has at least one component made of metal, and the metal surface is covered with a paint layer, so that the zipper component appears different colors from different angles. The paint layer comprises: 8% to 15% mica mineral powder; 22% to 28% acrylic resin; 40% to 46% xylene; 5% to 9% ethylene glycol monobutyl ether; 4% to 8% isobutyl alcohol; and 9% to 13% epoxy curing agent. The mica mineral powder is mixed powder 1 or mixed powder 2. Mixed powder 1 is a mixed powder of mica, rutile, and aluminum oxide; and mixed powder 2 is a mixed powder of mica, rutile, anatase, and tin oxide. The present invention eliminates the need for a chemical oxidation process, saving labor and resources. Furthermore, the present invention utilizes a specifically formulated paint, resulting in the finished product exhibiting different colors at different angles, a color that cannot be achieved by conventional zipper oxidation coloring, thus overcoming the issues of monotonous color and aesthetic fatigue in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0042] Figure 1 The effect diagram of the present invention is to prepare a uniform paint;

[0043] Figure 2 The effect diagram of the present invention is to prepare a uniform paint;

[0044] Figure 3 The figure is a schematic diagram of the coloring process in the zipper preparation process of the present invention. DETAILED DESCRIPTION

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0046] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0047] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] As used herein, when referring to numerical ranges, unless otherwise specified, the numerical ranges are considered continuous and include the minimum and maximum values of the range, as well as every value between such minimum and maximum values. Furthermore, when a range refers to an integer, every integer between the minimum and maximum values of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges subsumed therein.

[0049] In this document, when referring to a range, if the unit is followed only by the right endpoint, it means that the units of the left and right endpoints are the same. For example, 105-115°C means that the units of both the left endpoint "105" and the right endpoint "115" are °C.

[0050] The present invention provides a multi-color zipper, the zipper comprising zipper accessories;

[0051] The zipper accessories include at least one of a slider, a top stop, a bottom stop, and chain teeth;

[0052] At least one of the zipper accessories is made of metal;

[0053] The surface of the at least one zipper accessory made of metal is covered with a paint layer;

[0054] The zipper accessory covered with the paint layer presents different colors from different angles;

[0055] The different colors displayed from different angles are produced by a continuous layer of paint covering the surface of the zipper accessory.

[0056] In the present invention, before the paint layer is coated on the surface of the at least one zipper accessory made of metal, there is no need to perform an oxidation process on the metal surface.

[0057] In the present invention, preferably, the paint layer comprises, by mass percentage:

[0058]

[0059] in,

[0060] The mica mineral powder is mixed powder 1 or mixed powder 2; wherein mixed powder 1 is a mixed powder of mica, rutile, and aluminum oxide; and mixed powder 2 is a mixed powder of mica, rutile, anatase, and tin oxide. That is, the paint used to form the paint layer of the present invention includes the above components in the above mass percentages.

[0061] In the present invention, the mica mineral powder is mixed powder 1 or mixed powder 2.

[0062] Mixed Powder 1: Mixed powder 1 is a mixed powder of mica, rutile, and alumina. The contents of each component, by mass percentage, are as follows: mica 60% to 80% (excluding 80%), rutile 5% to 25% (excluding 25%), and alumina 5% to 25% (excluding 25%). Wherein, the content of the mica can be specifically 60%, 65%, 70%, 75%, 79%; the content of the rutile can be specifically 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%; the content of the alumina can be specifically 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%.

[0063] About mixed powder 2: The mixed powder 2 is a mixed powder of mica, rutile, anatase and tin oxide. In terms of mass percentage, the content of each component is as follows: mica 60% to 80% and excluding 80%, rutile 5% to 25% and excluding 25%, anatase 5% to 25% and excluding 25%, aluminum oxide 5% to 25% and excluding 25%. Among them, the content of mica can be specifically 60%, 65%, 70%, 75%, 79%; the content of rutile can be specifically 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%; the content of anatase can be specifically 5%, 6%, 7%, 8%, 9%, %, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%; the tin oxide content may specifically be 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%.

[0064] In the present invention, the average particle size of the mica mineral powder is preferably 10 to 60 μm, specifically 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, or 60 μm. Controlling the particle size within this range helps ensure various properties of the painted zipper (such as washability, color detection, color fastness, and corrosion resistance). If the particle size is too small or too large, it will not be conducive to achieving the above properties.

[0065] In the present invention, the content of the mica mineral powder in the paint is 8% to 15%, specifically 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, and more preferably 8%.

[0066] In the present invention, the acrylic resin is preferably WX-2032, which is a water-based acrylic resin. In the present invention, the content of the acrylic resin in the paint is 22% to 28%, specifically 22%, 23%, 24%, 25%, 26%, 27%, 28%, and more preferably 25%.

[0067] In the present invention, the source of the xylene is not particularly limited and can be a commercial product. In the present invention, the content of the xylene in the paint is 40% to 46%, specifically 40%, 41%, 42%, 43%, 44%, 45%, 46%, and more preferably 43%.

[0068] In the present invention, the source of the ethylene glycol monobutyl ether is not particularly limited and can be a commercial product. In the present invention, the content of the ethylene glycol monobutyl ether in the paint is 5% to 9%, specifically 5%, 6%, 7%, 8%, 9%, and more preferably 7%.

[0069] In the present invention, the source of the isobutanol is not particularly limited and can be a commercial product. In the present invention, the content of the isobutanol in the paint is 4% to 8%, specifically 4%, 5%, 6%, 7%, 8%, and more preferably 6%.

[0070] In the present invention, the epoxy curing agent is preferably BH-140. In the present invention, the content of the epoxy curing agent in the paint is 9% to 13%, specifically 9%, 10%, 11%, 12%, 13%, and more preferably 11%.

[0071] In the present invention, preferably, the proportions of the components of the paint layer are as follows:

[0072]

[0073]

[0074] In the present invention, the paint used to form the paint layer is prepared by the following preparation method:

[0075] S101, mixing acrylic resin, xylene, ethylene glycol monobutyl ether, isobutyl alcohol and epoxy curing agent to obtain a mixed solution;

[0076] S102, mixing mica mineral powder with the mixed solution obtained in step S101 to obtain paint.

[0077] Among them, the types and amounts of the acrylic resin, xylene, ethylene glycol monobutyl ether, isobutanol, epoxy curing agent, and mica mineral powder are consistent with those described in the above technical solution and are not repeated here.

[0078] Regarding step S101:

[0079] There is no particular limitation on the method for mixing the acrylic resin, xylene, ethylene glycol monobutyl ether, isobutyl alcohol and epoxy curing agent. The above materials can be uniformly mixed by conventional mixing methods in the art, such as stirring and mixing. Specifically, stirring and mixing can be performed using a high-speed disperser.

[0080] Regarding step S102:

[0081] The mica group mineral powder is a mixed powder. Therefore, different mica group mineral powders are pre-mixed to form a mixed powder. Specifically, the mixed powder can be prepared by adding various mica ores into a disperser and stirring until uniformly mixed. The various mica ores are added in any order. During the mixing process, a small sample can be removed and placed on a transparent glass slide to observe whether the different mica ores are evenly distributed. If not, mixing is continued until uniformly mixed. The uniformly mixed mica group mineral powder can be bottled and sealed for future use. In the present invention, the mica group mineral powder is preferably mixed with the mixed solution obtained in step S101 by adding the mica group mineral powder to the mixed solution obtained in step S101 under stirring conditions, and after addition, stirring and mixing to obtain the paint. The stirring condition can specifically be slow stirring with a stirring rod. After the mica group mineral powder is added, the stirring and mixing is preferably mechanical stirring. During the mixing process, you can take a sample and pour it into a transparent cup to observe whether the mica mineral powder is evenly distributed in the mixture. If the particles are clumped together, stir again. If the mica mineral powder is evenly distributed in the mixture, the paint is ready. Figure 1-2 shown.

[0082] In the present invention, the mica mineral powder is a mixed powder of different minerals, which can make the paint appear in different colors, for example, rutile appears gold, tin oxide appears light yellow, etc. (see Table 1 for details). Adding the above materials to the paint can present different colors. This color changes from dark to light at different angles, overcoming the problems of single color and aesthetic fatigue in the prior art. In addition, the present invention can achieve rich colors by adding specific mica mineral powder, without processing through a liquid oxidation process, saving labor and resources.

[0083] Table 1: Color effects of zippers painted with paints containing different mineral mica powders

[0084]

[0085] The present invention also provides a method for preparing the multi-color zipper described in the above technical solution, comprising the following steps:

[0086] S201, putting the zipper stack into the oven for ironing, so that the zipper tooth tape is in a straight state;

[0087] S202, using paint to color and bake the front side of the zipper elements obtained in step S101, and then using paint to color and bake the back side of the zipper elements;

[0088] S203, separating the two side chain elements of the zipper obtained in step S202, painting the slider of the zipper with paint, and then baking it, and then merging the separated two side chain elements to form the initial assembled shape to obtain the zipper.

[0089] Regarding step S201:

[0090] In the present invention, the zipper is preferably a metal zipper, more preferably a copper zipper. In the present invention, the pressing temperature is preferably 105-115°C, specifically 105°C, 106°C, 107°C, 108°C, 109°C, 110°C, 111°C, 112°C, 113°C, 114°C, or 115°C. The pressing time is preferably 5-6 minutes, specifically 5 minutes or 6 minutes. Without pressing, the zipper will have a certain degree of bend, making subsequent production inconvenient. In the present invention, the pressing process allows the zipper tooth tape to be straight.

[0091] Regarding step S202:

[0092] In the present invention, the coloring process preferably includes: soaking the lower part of the paint wheel in the paint in the paint box so that the paint adheres to the surface of the paint wheel, and the zipper above the paint wheel is driven by friction with the paint wheel to bring the paint upward so that the paint adheres to the zipper teeth, and then the subsequent paint wheel is used to continue to color the zipper teeth to form surface protection (such as Figure 3 As shown). The area of the lower part of the paint wheel immersed in the paint in the paint box is preferably 20% of the area of the paint wheel. The thickness of the paint colored by each paint wheel is 1 to 2 threads (1 thread = 0.01 mm). The number of the subsequent paint wheels can be 1 or more, preferably 1 to 3. A steel sheet is provided on the right side of the paint wheel, and a 2-thread gap is maintained between the steel sheet and the paint wheel (as shown). Figure 3 (as shown) to prevent the paint from being too thick and flowing onto the zipper tape. After the above coloring process, baking is performed. In the present invention, the baking temperature is preferably 110-130°C, specifically 110°C, 115°C, 120°C, 125°C, or 130°C; the baking time is preferably 7-10 minutes, specifically 7 minutes, 8 minutes, 9 minutes, or 10 minutes. The baking process allows the surface paint to adhere to the zipper surface and dry, firmly bonding to the zipper surface to form a paint layer.

[0093] In the present invention, after the front side of the zipper is painted and baked, the back side of the zipper is then painted and baked. The process flow is the same as that for the front side of the zipper and will not be described in detail here. In the present invention, the back side of the zipper can also be painted and baked first, and then the front side of the zipper; this is essentially the same as the above-mentioned technical solution of painting the front side first and then the back side, and also falls within the scope of protection of the present invention.

[0094] Regarding step S203:

[0095] In the present invention, after step S202 is completed, the zipper teeth on both sides are separated (i.e., the zipper teeth are separated on both sides), and the zipper slider is painted with paint. The coloring process preferably includes: the zipper teeth are inverted on the surface of a paint wheel to adhere to the paint; wherein, the thickness of the adhered paint is preferably 1 to 2 threads. The number of times of coloring is preferably 2 to 3 times, specifically 2 times or 3 times. After coloring, baking is performed. The baking temperature is preferably 110 to 130°C, specifically 110°C, 115°C, 120°C, 125°C, 130°C; the baking time is preferably 7 to 10 minutes, specifically 7 minutes, 8 minutes, 9 minutes, 10 minutes; the surface paint is adhered to the zipper surface and dried by baking. After both sides of the zipper are dried and cooled, the zipper teeth on both sides are merged together to form the initial assembly form.

[0096] In the present invention, after step S203, it is preferred to further perform the following steps: evaluating the surface quality of the zipper surface and the tooth head, determining whether the surface quality is acceptable through adhesion testing, and then testing the coloring and adhesion of the zipper by a device. If the zipper is acceptable, it is then fed into the subsequent production process of open and closed zippers for subsequent processing. The subsequent processing will not change the color of the zipper surface.

[0097] The multi-color zipper production method described above is a waterless, multi-color production process for metal zippers. Using a specially formulated paint, the finished product displays different colors at different angles, achieving a unique color palette that cannot be achieved with existing zipper oxidation methods. This overcomes the monotonous color scheme and aesthetic fatigue associated with existing zipper production methods. Furthermore, the present process eliminates the need for a chemical oxidation process, saving labor and resources.

[0098] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0099] Example 1

[0100] 1. Paint formula:

[0101]

[0102] in,

[0103] The composition of the mica mineral powder is as follows: mica 70%, rutile 12%, anatase 12%, and tin oxide 6%.

[0104] The acrylic resin is WX-2032.

[0105] The epoxy curing agent is BH-140.

[0106] 2. Preparation of paint

[0107] S101. Add acrylic resin, xylene, ethylene glycol monobutyl ether, isobutyl alcohol and epoxy curing agent into a high-speed disperser and stir and mix them evenly to obtain a mixed solution.

[0108] S102. Slowly stir the mixed solution obtained in step S101 with a stirring rod, then pour in the weighed mica mineral powder, and mechanically stir for several minutes to mix evenly to obtain paint.

[0109] 3. Preparation of zipper

[0110] S201, putting the copper zippers into an oven for ironing, maintaining the temperature in the oven at 110° C. for 5 minutes, so that the zipper teeth are in a straight state.

[0111] S202. Soak the lower 20% of the paint wheel in paint from the paint box, causing the paint to adhere to the wheel's surface. The zipper above the wheel then rubs against the wheel, pulling the paint upward and adhering to the zipper's teeth. A steel plate is located to the right of the wheel, maintaining a two-wire gap between the steel plate and the wheel to prevent excessive paint from flowing onto the zipper's surface and onto the fabric tape. The above coloring process is repeated to coat the surface with a thickness of one wire. A second paint wheel is then used to repeat the process, coating the surface with a thickness of one wire to form a protective film. The zipper is then placed in an oven and baked at 125°C for 10 minutes. After this process is complete, the reverse side of the zipper undergoes the same coloring and baking process.

[0112] S203. Separate the zipper teeth on both sides and place the zipper teeth upside down on the paint wheel to adhere the paint to a thickness of 1 thread. After painting twice, place the zipper in the oven and bake at 125°C for 10 minutes. After drying both sides of the zipper, cool it down and then join the zipper teeth together to form the initial assembly.

[0113] The zipper surface and the tooth head are inspected to determine the surface effect, and then the equipment is used to test whether the color adhesion is qualified. If qualified, it is injected into the subsequent opening and closing zipper production process for subsequent production and processing to obtain the finished zipper.

[0114] Comparative Example 1

[0115] 1. Paint formula:

[0116] The process was carried out in accordance with Example 1, except that the average particle size of the mica mineral powder used was 80 μm.

[0117] 2. Preparation of paint: same as in Example 1.

[0118] 3. Preparation of zipper

[0119] Following Example 1, the results showed that after step S203, after the zipper cooled, the rear section of the zipper showed precipitation during production due to overly large particles, resulting in the absence of single or multi-color variations. While the front section of the finished zipper had color, after washing and other testing, the mica minerals showed fragmentation. While the rear section of the zipper passed the color precipitation test, it did not achieve the desired effect and failed to meet customer requirements.

[0120] Comparative Example 2

[0121] 1. Paint formula:

[0122] The process was carried out in accordance with Example 1, except that the average particle size of the mica mineral powder used was 5 μm.

[0123] The results showed that when the particles of the product were too small according to the paint formula and put into the disperser, minerals flew up after high-speed dispersion and stirring, resulting in color deviation.

[0124] Product Testing :

[0125] The finished zippers were subjected to various tests. The test results are shown in Table 6.

[0126] (1) Washability test: Wash in a washing machine at 40°C with 17L of water and 68g of detergent for 45 minutes, using five cycles of water. See Table 2 for test results.

[0127] Table 2: Washability test results criteria

[0128]

[0129]

[0130] (2) Color detection: Refer to Table 3 for the determination of the test results.

[0131] Table 3: Color detection result judgment criteria

[0132] grade Phenomenon determination 1 No obvious color difference qualified 2 Slight color difference qualified 3 Obvious color difference Unqualified 4 There is a gap Unqualified 5 Partial color Unqualified

[0133] (3) Color fastness: 20cm of double-sided tape and 20cm of zipper. Press the double-sided tape onto the zipper and then tear it off to see if the double-sided tape has any color. Then carefully observe the percentage of color loss on the tooth surface. The test results are determined in Table 4.

[0134] Table 4: Color fastness grade test result judgment criteria

[0135] grade Phenomenon determination 1 1.0%≤Proportion≤2.5% qualified 2 2.6%≤Proportion≤5% qualified 3 5.1%≤Proportion≤10% Unqualified 4 10.1%≤Proportion≤20% Unqualified 5 20.1%≤Proportion≤100% Unqualified

[0136] (4) Salt spray fastness: 5% concentration, spray inside the box for 24 hours. Refer to Table 5 for the judgment of the test results.

[0137] Table 5: Salt spray fastness test result judgment criteria

[0138] grade Defect area ratio Phenomenon 5 1.0%≤Proportion≤2.5% There are corrosion products or pitting on the surface of the specimen, and one of them is distributed over the entire surface of the specimen. 4 2.6%≤Proportion≤5% There is a thick layer of corrosion products or pitting on the surface of the specimen 3 5.1%≤Proportion≤10% There is a very thick layer of corrosion products or pitting on the surface of the specimen, and there are deep pitting 2 10.1%≤Proportion≤20% The sample showed the phenomenon of base metal corrosion 1 25.1%≤Proportion≤100% The metal matrix of the sample showed severe corrosion

[0139] Table 6: Test results summary

[0140] Test items Comparative Example 1 Comparative Example 2 Example 1 Washing grade Level 3 (Unqualified) Level 4 (pass) Level 5 (pass) Color detection Level 3 (Unqualified) Level 5 (pass) Level 2 (pass) Color fastness Level 4 (Unqualified) Level 5 (failed) Level 2 (pass) Salt spray level Level 5 (pass) Level 5 (pass) Level 5 (pass)

[0141] It can be seen from the test results in Table 6 that Example 1 of the present invention passed all tests and showed excellent comprehensive performance.

[0142] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal description of the claims, or if they include equivalent structural elements that are not substantially different from the literal description of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A multi-color zipper, characterized by: The zipper includes a zipper accessory; The zipper accessories include at least one of a slider, a top stop, a bottom stop, and a chain tooth; At least one of the zipper accessories is made of metal; The surface of the at least one zipper accessory made of metal is covered with a paint layer; The zipper accessory covered with the paint layer presents different colors from different angles; The different colors displayed from different angles are produced by a continuous layer of paint covering the surface of the zipper accessory.

2. The multi-color zipper according to claim 1, characterized in that: Before coating the paint layer on the surface of the at least one zipper accessory made of metal, there is no need to perform an oxidation process on the metal surface.

3. The multi-color zipper according to claim 1 or 2, characterized in that: The paint layer comprises, by mass percentage: in, The mica mineral powder is mixed powder 1 or mixed powder 2; wherein, the mixed powder 1 is a mixed powder of mica, rutile and alumina; the mixed powder 2 is a mixed powder of mica, rutile, anatase and tin oxide.

4. The multi-color zipper according to claim 3, characterized in that: The average particle size of the mica mineral powder is 10 to 60 μm.

5. The multi-color zipper according to claim 3, characterized in that: In terms of mass percentage, the contents of the components in the mixed powder 1 are as follows: Mica: 60% to 80% and not including 80%; Rutile: 5% to 25% and excluding 25%; Alumina: 5% to 25% and excluding 25%; In terms of mass percentage, the contents of the components in the mixed powder 2 are as follows: Mica: 60% to 80% and not including 80%; Rutile: 5% to 25% and excluding 25%; Anatase: 5% to 25% and excluding 25%; Alumina: 5% to 25% (excluding 25%).

6. The multi-color zipper according to claim 3, characterized in that: The acrylic resin is WX-2032; The epoxy curing agent is BH-140.

7. The multi-color zipper according to claim 3, characterized in that: The paint used to form the paint layer is prepared by the following preparation method: S101, mixing acrylic resin, xylene, ethylene glycol monobutyl ether, isobutyl alcohol and epoxy curing agent to obtain a mixed solution; S102, mixing mica mineral powder with the mixed solution obtained in step S101 to obtain paint.

8. A method for preparing a multi-color zipper according to any one of claims 1 to 7, characterized in that: The following steps are involved: S201, putting the zipper stack into the oven for ironing, so that the zipper tooth tape is in a straight state; S202, using paint to color and bake the front side of the zipper elements obtained in step S101, and then using paint to color and bake the back side of the zipper elements; S203, separating the two side chain elements of the zipper obtained in step S202, painting the slider of the zipper with paint, and then baking it, and then merging the separated two side chain elements to form the initial assembled shape to obtain the zipper.

9. The preparation method according to claim 8, characterized in that In step S201, the ironing temperature is 105-115°C and the ironing time is 5-6 minutes; In step S202, the baking temperature is 110-130°C and the baking time is 7-10 minutes; In step S203, the baking temperature is 110-130° C. and the baking time is 7-10 minutes.

10. The preparation method according to claim 8, characterized in that In step S202, the coloring process includes: soaking the lower part of the paint wheel in the paint in the paint box so that the paint adheres to the surface of the paint wheel, and the zipper above the paint wheel drives the paint wheel to rub against the paint wheel so as to bring the paint upward so that the paint adheres to the zipper teeth, and then the subsequent paint wheel continues to color the zipper teeth to form surface protection.

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