Preparation method of a magic hook and the magic hook

Abstract

The present invention relates to the field of magic hooks, and particularly to a preparation method of magic hooks and magic hooks, which comprises the following steps: providing an aqueous polyurethane slurry and a nylon non-woven fabric, using the nylon non-woven fabric as the diaphragm substrate of the hook surface, and the aqueous polyurethane slurry as the hook substrate of the hook surface; providing an intaglio structure and a continuous hot melt adhesive printing coater, wherein grooves for forming the barbs of the magic hook are formed on the intaglio structure, and the grooves are in a multi-column "T" shape or a multi-column inverted triangular cone structure and are arranged in a staggered manner for each column; combining the intaglio structure onto the hot roller of the continuous hot melt adhesive printing coater; coating the hot-melt-treated aqueous polyurethane slurry on the surface of the diaphragm substrate through an intaglio coating process and forming a polyurethane elastic part on the surface of the diaphragm substrate, and the polyurethane elastic part comprises the barbs of the hook surface to obtain the hook surface; making a looped plush structure on the surface of the flexible PET non-woven fabric through a textile method to produce the fuzzy surface, which can be continuously processed and produced, thereby improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of magic hooks, and in particular to a preparation method and a magic hook of a magic hook. Background Art

[0002] A magic hook is a commonly used connecting auxiliary material, which is divided into male and female sides. Among them, the male side is soft and fine velvet loops, and the female side is elastic fibers with barbs. The male side and the female side can be bonded or separated from each other.

[0003] The male side and the female side are buckled with each other to achieve connection; then, under the condition of a certain horizontal pulling force, the elastic barbs on the female side are straightened, and then the barbs on the female side are loosened from the soft and fine velvet loops on the male side and opened, and the male side and the female side are separated; then the barbs on the female side return to their original hooked shape.

[0004] However, most of the currently used magic hooks are made by an injection molding process with polymer and nylon raw materials. The barbs on the female side are made of relatively soft materials, and the female side is ultra-thin and can be used in combination with various hook-and-loop soft surface materials. The magic hooks formed by injection molding have the problems of inability to continuously process and low production efficiency.

[0005] Therefore, there is an urgent need to provide a preparation method and a magic hook other than the injection molding process to solve the problem that the magic hooks formed by injection molding cannot be continuously processed and produced, and improve the production efficiency. Summary of the Invention

[0006] Based on this, in view of the existing problems, it is necessary to provide a preparation method and a magic hook of a magic hook, aiming to solve the problem that the magic hooks formed by injection molding cannot be continuously processed and produced, and improve the production efficiency.

[0007] The first aspect of the present application provides a preparation method of a magic hook, the magic hook includes a hook surface and a plush surface, and the method includes the following steps:

[0008] Provide aqueous polyurethane slurry and nylon non-woven fabric, use the nylon non-woven fabric as the diaphragm substrate of the hook surface, and the aqueous polyurethane slurry as the hook substrate of the hook surface;

[0009] Provide an intaglio structure and a continuous hot melt adhesive printing coater, the intaglio structure is provided with grooves for forming barbs of the magic hook, and the grooves are in a multi-column "T" shape or a multi-column inverted triangular cone structure and are arranged in a staggered manner for each column;

[0010] Combine the intaglio structure onto the hot roller of the continuous hot melt adhesive printing coater;

[0011] The hot-melt treated aqueous polyurethane slurry is applied to the surface of the separator substrate through a gravure coating process, and a polyurethane elastic part including barbs on the hook surface is formed on the surface of the separator substrate to obtain the hook surface;

[0012] A looped plush structure is made on the surface of the flexible PET non-woven fabric by a textile method to produce a fuzzy surface.

[0013] In some embodiments, a groove for forming a hot-melt convex column of the magic hook is further formed on the gravure structure, and the polyurethane elastic part further includes a hot-melt convex column, and the hot-melt convex column is configured to be fixed by hot-melt deformation in the slot to be assembled.

[0014] In some embodiments, the aqueous polyurethane slurry is a hot-meltable aqueous polyurethane emulsion, the hot-meltable aqueous polyurethane emulsion is a milky white translucent liquid with a solid content of 32±5%, a PH value of 6-8, and a viscosity greater than 300 mPa·S.

[0015] In some embodiments, the coating speed in the gravure coating process is 1-2 m / min, the maximum coating speed is 4.5 m / min, and the highest operating temperature is 200°C.

[0016] In some embodiments, the thickness of the nylon non-woven fabric is 0.3-1.5 mm.

[0017] In some embodiments, applying the hot-melt treated aqueous polyurethane slurry to the surface of the separator substrate through the gravure coating process to form a polyurethane elastic part on the surface of the separator substrate includes the following steps:

[0018] The water-soluble polyurethane slurry is taken out of the slurry box by a hot roller combined with a gravure structure;

[0019] Use a doctor blade to scrape off the excess water-soluble polyurethane slurry on the hot roller;

[0020] Under pressure, the water-soluble polyurethane slurry taken out from the hot roller is coated on the surface of the separator substrate;

[0021] The separator substrate and the uncured aqueous polyurethane are subjected to a curing treatment. After the curing is completed, the semi-finished product is peeled off and taken out, and the semi-finished product has a semi-finished hook head initially formed;

[0022] Continue to shape the semi-finished product by continuously heating with hot air, so that the semi-finished hook head bends naturally, and a hook surface is obtained after shaping.

[0023] In some embodiments, the curing temperature used in the step of combining the separator substrate and the uncured aqueous polyurethane for curing treatment is 80-100°C.

[0024] In some embodiments, in the step of continuing to shape the semi-finished product by continuously heating with hot air to make the hook of the semi-finished product bend naturally, it includes:

[0025] Maintain the heating temperature of the continuous hot air heating at 110 - 150 °C, so that the bending angle of the hook of the semi-finished product after shaping is 0 - 45°.

[0026] In some embodiments, the thickness of the matte surface is 0.8 mm - 6.8 mm, the elongation rate is 40% - 80%, and the gram weight is 40 - 100 g / m².

[0027] The second aspect of the present application provides a magic hook, including:

[0028] A hook surface, including a diaphragm substrate and barbs formed on the diaphragm substrate by intaglio coating process. The diaphragm substrate is made of nylon non-woven fabric, and the barbs are made of water-soluble polyurethane;

[0029] A matte surface, the matte surface is a flexible PET non-woven fabric, and a ring-shaped plush structure is formed on the surface of the flexible PET non-woven fabric by a textile method.

[0030] Advantages of the present invention:

[0031] The preparation method of the magic hook of the present invention includes the following steps: providing an aqueous polyurethane slurry and nylon non-woven fabric, using the nylon non-woven fabric as the diaphragm substrate of the hook surface and the aqueous polyurethane slurry as the hook substrate of the hook surface; providing an intaglio structure and a continuous hot melt adhesive printing coater, and grooves for forming barbs of the magic hook are opened on the intaglio structure. The grooves are multi-column "T" type or multi-column inverted triangular cone structures and are arranged in a staggered manner for each column; combining the intaglio structure to the hot roller of the continuous hot melt adhesive printing coater; coating the hot-melt treated aqueous polyurethane slurry on the surface of the diaphragm substrate through intaglio coating process and forming a polyurethane elastic part on the surface of the diaphragm substrate. The polyurethane elastic part includes the barbs of the hook surface to obtain the hook surface; making a ring-shaped plush structure on the surface of the flexible PET non-woven fabric by a textile method to produce the matte surface. The hook surface of the present application adopts the intaglio coating method. Different from the traditional injection molding method, intaglio coating can adapt to size requirements of different widths and lengths, is not single and fixed, and is more flexible. The processing speed and accuracy of intaglio coating are relatively high, the process is mature, and at the same time, the processing and maintenance of the hot roller are relatively simple, the cost is low and it can be reused repeatedly, and it can be processed and produced continuously, improving production efficiency. In addition, the diaphragm substrate is nylon non-woven fabric and the barbs are polyurethane elastomers. The combination of the two can improve the softness of the hook surface, effectively improve the adhesion and durability, and thus a magic hook with high strength and softness can be produced. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiment drawings can be obtained based on these drawings.

[0033] Figure 1 Schematic structural diagram of the hook surface and the fuzzy surface of a magic hook provided by an embodiment of the present application;

[0034] Figure 2 Schematic flow diagram of a preparation method of a magic hook provided by an embodiment of the present application.

[0035] Reference numerals:

[0036] 1. Hook surface; 11. Diaphragm substrate; 12. Hook spines; 13. Heat-meltable convex columns; 2. Fuzzy surface; 21. Ring-shaped plush structure. Detailed embodiments

[0037] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed embodiments of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0039] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly defined and limited, a feature may be in direct contact with a second feature or indirectly in contact with the second feature through an intermediate medium "above" or "below" the second feature. Moreover, a feature "above", "over", and "on top of" the second feature may be directly above or obliquely above the second feature, or merely indicate that the horizontal height of the feature is higher than that of the second feature. A feature "below", "beneath", and "underneath" the second feature may be directly below or obliquely below the second feature, or merely indicate that the horizontal height of the feature is lower than that of the second feature.

[0042] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "above", "below", "left", "right", and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0043] Most of the current magic hooks are made of polymer and nylon materials through an injection molding process. The barbs 12 on the female surface are made of a softer material, and the female surface is ultra-thin and can be used in combination with various hook-and-loop soft surface materials, especially hook-and-loop fabric, that is, the male surface. The injection-molded magic hook has the problems of inability to continuously process and low production efficiency.

[0044] Reference Figure 1-2 , an embodiment of the present application provides a method for preparing a magic hook. The magic hook includes a hook surface 1 and a fleece surface 2, and includes the following steps:

[0045] Provide an aqueous polyurethane slurry and nylon non-woven fabric. Use the nylon non-woven fabric as the diaphragm substrate 11 of the hook surface 1, and the aqueous polyurethane slurry as the hook substrate of the hook surface 1;

[0046] Provide an intaglio structure and a continuous hot melt adhesive printing coater. The intaglio structure is provided with grooves for forming the barbs 12 of the magic hook. The grooves are in a multi-column "T" shape or a multi-column inverted triangular cone structure and are arranged in a staggered manner for each column;

[0047] Combine the gravure structure onto the hot roller of a continuous hot melt adhesive printing coater;

[0048] Apply the hot melt-treated aqueous polyurethane slurry onto the surface of the diaphragm substrate 11 through a gravure coating process and form a polyurethane elastic part on the surface of the diaphragm substrate 11. The polyurethane elastic part includes barbs 12 of the hook surface 1 to obtain the hook surface 1;

[0049] Make a looped plush structure 21 on the surface of the flexible PET non-woven fabric through a textile method to produce and obtain the fuzzy surface 2.

[0050] In this embodiment, the hook surface 1 is prepared by a gravure coating method. Different from the traditional injection molding method, gravure coating can adapt to the dimensional requirements of different widths and lengths, is not single and fixed, and is more flexible. The processing speed and accuracy of gravure coating are relatively high, the process is mature, and at the same time, the processing and maintenance of the hot roller are relatively simple, the cost is low and it can be reused repeatedly, and it can be processed continuously, improving production efficiency. In addition, the diaphragm substrate 11 is a nylon non-woven fabric, and the barbs 12 are polyurethane elastomers. The combination of the two can improve the softness of the hook surface 1, effectively improve the adhesion and durability, and thus a high-strength and soft magic hook can be produced.

[0051] Reference Figure 1-2 , in some embodiments, the gravure structure is also provided with a groove for forming the hot melt convex post 13 of the magic hook. The polyurethane elastic part also includes the hot melt convex post 13. The hot melt convex post 13 is configured to be fixed in the slot on the part to be assembled through hot melt deformation. The hot melt method does not require the addition of any adhesives, solvents, fillers, and does not require additional fasteners; the structure is simple, and it is local heating, and the heating will not cause damage to other parts; the production efficiency is high, multiple hot melt convex posts 13 or the assembly of multiple parts can be hot melted at the same time, which is suitable for mass production with low cost; the hot melt processing process has no vibration, no pollution, no noise, and is environmentally friendly, energy-saving, fast, and efficient.

[0052] In some embodiments, the aqueous polyurethane slurry is a hot meltable aqueous polyurethane emulsion. The hot meltable aqueous polyurethane emulsion is a milky white translucent liquid with a solid content of 32 ± 5%, a PH value of 6 - 8, and a viscosity greater than 300 mPa·S, which can better ensure its own softness, elasticity and service life.

[0053] In some embodiments, the coating speed in the gravure coating process is 1 - 2 m / min, the maximum coating speed is 4.5 m / min, and the highest operating temperature is 200 °C, which can achieve gravure coating more uniformly and stably.

[0054] In some embodiments, the thickness of the nylon non-woven fabric is 0.3 - 1.5 mm, and the thickness is appropriate, which not only ensures good softness but also ensures a relatively low cost.

[0055] Reference Figure 1-2 , in some embodiments, applying the hot-melt treated aqueous polyurethane slurry onto the surface of the separator substrate 11 through a gravure coating process to form a polyurethane elastic part on the surface of the separator substrate 11 includes the following steps:

[0056] Taking out the water-soluble polyurethane slurry from the slurry box by a hot roll combined with a gravure structure; scraping off the excess water-soluble polyurethane slurry on the hot roll with a doctor blade; applying the water-soluble polyurethane slurry taken out on the hot roll onto the surface of the separator substrate 11 under pressure; curing the separator substrate 11 and the uncured aqueous polyurethane, and stripping and taking out the semi-finished product after curing is completed. The semi-finished product has a preliminarily formed semi-finished product hook; continuing to shape the semi-finished product by continuously heating with hot air, so that the semi-finished product hook bends naturally, and a hook surface 1 is obtained after shaping.

[0057] Through the above gravure coating steps, it is possible to ensure that the barbs 12 of the hook surface 1 prepared by gravure coating have relatively good flexibility and quality.

[0058] Furthermore, in some embodiments, the curing temperature adopted in the step of combining the separator substrate 11 and the uncured aqueous polyurethane for curing treatment is 80 - 100 °C to ensure smooth curing.

[0059] Reference Figure 1-2 , in some embodiments, in the step of continuing to shape the semi-finished product by continuously heating with hot air so that the semi-finished product hook bends naturally, it includes: maintaining the heating temperature of the continuous hot air heating at 110 - 150 °C, so that the bending angle of the semi-finished product hook after shaping is 0 - 45 °, and thus a hook surface 1 with excellent bending angle can be obtained.

[0060] In addition, in some embodiments, the thickness of the fuzzy surface 2 is 0.8 mm - 6.8 mm, the elongation rate is 40% - 80%, and the gram weight is 40 - 100 g / m², so as to ensure that the fuzzy surface 2 has good softness.

[0061] Reference Figure 1-2 , based on the above method for preparing the magic hook, an embodiment of the present application further provides a magic hook, which includes a hook surface 1 and a fuzzy surface 2. The hook surface 1 includes a separator substrate 11 and barbs 12 formed on the separator substrate 11 by a gravure coating process. The separator substrate 11 is made of nylon non-woven fabric, and the barbs 12 are made of water-soluble polyurethane; the fuzzy surface 2 is a flexible PET non-woven fabric, and a looped plush structure 21 made by a textile method is formed on the surface of the flexible PET non-woven fabric.

[0062] Furthermore, based on any of the above-described embodiments of the preparation method of the magic hook, the present application also provides a corresponding improved magic hook, and the performance and structure of the specific magic hook will not be elaborated herein.

[0063] Finally, it should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0064] The above embodiments only represent one of the implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A preparation method of a magic hook, the magic hook comprising a hook surface (1) and a fleece surface (2), characterized in that, Comprising the following steps: Providing an aqueous polyurethane slurry and a nylon non-woven fabric, using the nylon non-woven fabric as the diaphragm substrate (11) of the hook surface (1), and using the aqueous polyurethane slurry as the hook part substrate of the hook surface (1); Providing an intaglio structure and a continuous hot melt adhesive printing coater, wherein the intaglio structure is provided with grooves for forming the barbs (12) of the magic hook, and the grooves are in a multi-column "T" shape or a multi-column inverted triangular cone shape and are arranged in a staggered manner for each column; Combining the intaglio structure onto the hot roller of the continuous hot melt adhesive printing coater; Coating the hot melt-treated aqueous polyurethane slurry on the surface of the diaphragm substrate (11) through an intaglio coating process and forming a polyurethane elastic part on the surface of the diaphragm substrate (11), wherein the polyurethane elastic part includes the barbs (12) of the hook surface (1) to obtain the hook surface (1); Making a looped plush structure (21) on the surface of a flexible PET non-woven fabric through a textile method to produce and obtain the fuzzy surface (2); The aqueous polyurethane slurry is a hot meltable aqueous polyurethane emulsion, the hot meltable aqueous polyurethane emulsion is a milky white translucent liquid with a solid content of 32 ± 5%, a PH value of 6 - 8, and a viscosity greater than 300 mPa·S; The coating speed in the intaglio coating process is 1 - 2 m / min, and the maximum operating temperature is 200 °C; Among them, the step of coating the hot melt-treated aqueous polyurethane slurry on the surface of the diaphragm substrate (11) through an intaglio coating process to form a polyurethane elastic part on the surface of the diaphragm substrate (11) includes the following steps: Taking out the water-soluble polyurethane slurry from the slurry box through a hot roller combined with an intaglio structure; Scraping off the excess water-soluble polyurethane slurry on the hot roller using a thickness-fixed scraper; Coating the water-soluble polyurethane slurry taken out from the hot roller onto the surface of the diaphragm substrate (11) under pressure; Curing the diaphragm substrate (11) and the uncured aqueous polyurethane, and stripping and taking out the semi-finished product after curing is completed. The semi-finished product has a semi-finished hook head initially formed; the curing temperature adopted in the step of combining the diaphragm substrate (11) and the uncured aqueous polyurethane for curing treatment is 80 - 100 °C; Continuing to shape the semi-finished product by continuously heating with hot air, making the semi-finished hook head bend naturally, and obtaining the hook surface (1) after shaping; In the step of continuing to shape the semi-finished product by continuously heating with hot air and making the semi-finished hook head bend naturally, it includes: maintaining the heating temperature of the continuous hot air heating at 110 - 150 °C, so that the bending angle of the semi-finished hook head after shaping is 0 - 45 °.

2. The preparation method of the magic hook according to claim 1, characterized in that The intaglio structure is further provided with a mold groove for forming the hot meltable convex posts (13) of the magic hook, the polyurethane elastic part further includes the hot meltable convex posts (13), and the hot meltable convex posts (13) are configured to be fixed in the slots to be assembled through hot melt deformation.

3. The preparation method of the magic hook according to claim 1, characterized in that, The thickness of the nylon non-woven fabric is 0.3 - 1.5 mm.

4. The preparation method of the magic hook according to claim 1, characterized in that The thickness of the fuzzy surface (2) is 0.8 mm - 6.8 mm, the elongation rate is 40% - 80%, and the gram weight is 40 g / m - 100 g / m.

5. A magic hook, characterized in that, Including: The hook surface (1) includes a diaphragm substrate (11) and barbs (12) in the method for preparing the magic hook according to claim 1, the diaphragm substrate (11) is made of nylon non-woven fabric, and the barbs (12) are made of hot-melt water-soluble polyurethane; The loop surface (2) is a flexible PET non-woven fabric, and a looped plush structure (21) made by a textile method is formed on the surface of the flexible PET non-woven fabric.

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