KR20080026901A - How to Hotfix - Google Patents

Abstract

By replacing the UV coating followed by the aluminum deposition process in one process, a hotfix manufacturing method that can reduce the cost and facilitate mass production consists of the following configuration.

Injection molding a plurality of stones using a plastic resin as a material for forming a stone; Spray coating a mixture of mirror ink and amyl on the back side of the stone; Preparing a resin composition comprising a urethane resin, a phenolic resin, EVA, a green oil, and a high elasticity hardener; Combining the resin composition with a hot melt to form an adhesive; Applying said adhesive to the back side of said stone; And drying the adhesive applied to the stone.

Description

Hotfix manufacturing method {METHOD FOR MANUFACTURING HOT FIX}

1 is a cross-sectional view showing a process of injection of a hotfix according to the invention from a mold.

Figure 2a and Figure 2b is a schematic diagram showing a spray coating process of the hotfix manufacturing method according to the present invention.

Figure 3 is a schematic diagram showing the adhesive coating process of the hotfix manufacturing method according to the present invention.

Figure 4 is a schematic diagram showing a drying process of the hotfix manufacturing method according to the present invention.

Figure 5 is a schematic diagram showing the ultrasonic cutting process of the hotfix manufacturing method according to the present invention.

Figure 6 is a plan view of a stone connector injection molded through a mold during the hotfix manufacturing process according to the present invention.

FIG. 7 is a cross-sectional view of a portion of the stone connector of FIG. 6. FIG.

8 is a view schematically showing a rotary spray coating operation in the hotfix manufacturing process according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: Stone forming mold 13: gate

20: stone connector 22: stone

24: gate portion 29: adhesive

30: rotating table 32: rotating shaft

40: Miller Ink Spray Injector 42: Nozzle

45: suction device 50: drying device

60: ultrasonic cutting device

The present invention relates to a method for producing an acrylic hotfix, which is a kind of decoration, and more particularly, to a method for manufacturing a hotfix that can reduce costs by simplifying a manufacturing process and prevent stones from being attached to each other.

A hot fix is an ornament that attaches to clothes, bags, shoes, belts, hats, etc. and gives a three-dimensional decoration to the product. The shape of a hemisphere having an arc or polyhedron structure made of metal, glass, aluminum, etc. Is done.

A method for producing an acrylic hotfix includes a method of plastic injection of a stone, UV coating on the decorative surface of the stone, and then aluminum deposition on the back surface of the stone. However, this method has a high quality of the hotfix, but since the hotfix is manufactured separately through the UV coating process and the aluminum deposition process, the cost of the two-step process is incurred.

In addition, since the UV coating device and aluminum deposition device is a fairly expensive equipment, there is a problem that the burden of facility cost increases.

Moreover, the problem of sticking to each other during the manufacturing process is occurring. When the stones adhered to each other in this way, the phenomenon that the coating layer is separated from the stone occurs. Because of this separation, many hotfix manufacturers were at risk of claims when exporting overseas.

The present invention is to solve the problems of the above-described conventional hotfix manufacturing method, by replacing the conventional UV coating followed by the aluminum deposition process in one process, a hotfix manufacturing method that can reduce costs and facilitate mass production. The purpose is to provide.

Another object of the present invention is to provide a method of manufacturing a hotfix that can solve the problem of sticking stones.

In order to achieve the above object, the present invention provides a hotfix manufacturing method consisting of the following configuration.

Injection molding a plurality of stones using a plastic resin as a material for forming a stone;

Spray coating a mixture of mirror ink and amyl on the back side of the stone;

Preparing a resin composition comprising a urethane resin, a phenolic resin, EVA, a green oil, and a high elasticity hardener;

Combining the resin composition with a hot melt to form an adhesive;

Applying said adhesive to the back side of said stone; And

Hot-roll manufacturing method comprising the step of drying the adhesive applied to the stone.

The present inventors confirmed that, when an appropriate amount of amyl is mixed into the mirror ink used in the printing industry, a hot fix can be produced by spraying on the back side of a stone having various polygonal decorative shapes. Accordingly, it is possible to process a hotfix made of a two-step process, such as UV coating and aluminum deposition in one process.

The mirror ink is a special purpose ink having a mirror effect by including aluminum flakes, and may exhibit a reflective effect such as aluminum foil when printed on the back side. The color is mostly silver, but sometimes red or golden color is used. Mirror ink is mainly acrylic. Mainly applied to injection molding of PC, PVC, etc., it has excellent workability, high gloss and good hiding power. In one preferred embodiment of the present invention, Ultrastar SX-9101 ink of German ECKART is used as the mirror ink.

When amyl is added to such a mirror ink, even in one step of spray coating, it is possible to obtain a hot fix having superior properties such as adhesion and glossiness than the conventional two-step process of UV coating and aluminum deposition.

In the mixture with the mirror ink, amyl performs a drying delay function. As for content of amyl, 3-10 weight% is suitable. If amyl is added below 3%, the drying is too fast, making spray application operation practically difficult. In other words, with no amylose or too little mirror ink alone cannot produce a hot fix by spray coating. On the other hand, when amylose is added in excess of 10%, the ink is not glossy when finished.

Meanwhile, in the case of the hotfix manufactured by spray coating as described above, the composition of the adhesive used for attachment to clothing may be different from that of the conventional art, and thus the quality of the hotfix produced may be improved.

That is, the adhesive used in the present invention is 20-40% by weight of urethane resin, 10-20% by weight of phenolic resin, 30-50% by weight of EVA, 5-13% by weight of high elasticity hardener, copper green oil (methyl salicylate) 1-2 The resin composition comprising% is blended with the hot melt in a ratio of 6: 4 to 8: 2. At this time, it is preferable to mix an appropriate amount of the cyclohexanone.

According to this, the high-elasticity curing agent is added to the resin composition for the adhesive made of urethane resin, phenol, EVA, etc. 5-13% by weight, thereby preventing the manufactured aluminum stones from sticking together. The high elastic hardener acts to harden other components of the adhesive, and BRF is used in a preferred embodiment of the present invention. BRF is a pale yellow translucent liquid and is a material used as an adhesive and curing agent. BRF includes BRF-M or BRF-E. In the case of BRF-M, MC (methylene chloride, Methylene Chloride) is used as a solvent, and NCO (isocyanate) is contained in an amount of 4.8-5.2 wt%. BRF-E uses EA (Ethyl Acetate) as a solvent and adds 6.6-7.0% by weight of NCO.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 5 are diagrams sequentially showing a hotfix manufacturing process according to the present invention.

As shown in FIG. 1, a plurality of stones are simultaneously injection molded using the stone forming mold 10. The stone forming mold 10 has a plurality of stone forming portions 11 formed to produce a plurality of stones at the same time, the stone forming portion 11 is a gate so that the plastic liquid that is the material of the stone can be injected ( 13) to be connected to each other.

As described above, the injection molding manufactured through the mold 10 has a structure in which a plurality of stones 22 are connected to each other by a gate part 24 formed by the gate 13 as shown in FIGS. 6 and 7. Stone connection body 20 ').

The material of the stone 22 uses an acrylic resin. Acrylic resins are polymers from esters such as acrylic acid and methacrylic acid. They are colorless and transparent, and are characterized by being more transparent to light, especially ultraviolet rays than normal glass. Both water resistance and the like have good characteristics. In addition, when used as an acrylic material, it is possible to make a stone having various basic colors when the pigments according to the color is mixed, and then molded by injection using the stone forming mold (1).

After injection molding is completed, a spray coating process is performed as shown in FIGS. 2A and 2B. In FIG. 2A, the spray process is spraying a mixture of mirror ink and amyl, instead of omitting UV coating and aluminum deposition. This spraying process improves brilliance and adhesion far beyond conventional products and eliminates costly UV coating and aluminum deposition, resulting in cost savings and doubled productivity. In addition, since only the spray injector 40 is required, the facility cost is also low. In the spray process, as shown in FIG. 8, the stone connecting body 20 is fixed to the rotating shaft 32 protruding from the rotating table 30, and the rotating shaft 32 and the driving unit are driven using a driving means such as a motor 34. It may be made by spray-spraying, while rotating the stone connector 20. According to such a rotation method, the effect of making a coating uniform is obtained. The thickness of the mirror ink film 27 coated on the stone is made to be approximately 10-20 μm uniformly. On the other hand, Figure 2b is a view schematically illustrating a structure for sucking the blowing ink powder by placing a strong suction device 45 in the rear. According to this, scattered particles can be removed by the suction device 45, so that the stone becomes a clean surface product.

The spray coating is followed by an adhesive application process as shown in FIG. 3. In the adhesive application process, the adhesive 29 having a component to be described in detail below is sprayed onto the bottom surface of the stone 22 to which the mirror ink is applied in the stone connecting body 20.

The adhesive 29 is not a commonly used adhesive, but is specially manufactured so that the stone 22 is completed and a commercialized hotfix can be attached to a material such as fiber in a stable state. That is, the hotfix of the present invention is used to have a water resistance, detergent resistance, solvent resistance and the like to have a sufficient adhesion to the fiber material, such as clothing, and also have a sufficient adhesion performance for washing and the like. Such adhesives, in particular, contain a high-elasticity hardener, so that the stones produced do not stick together when they come into contact.

Specifically, in the present embodiment, the adhesive is made of a mixture of urethane, phenol, EVA, copper oil, high-elastic curing agent, etc., 30% by weight of urethane, 20% by weight of phenol, 40% by weight of EVA, 9% by weight of high-elasticity hardener, copper green Mix 1% by weight of oil, melt it by boiling water using boiling water, or steam, to start the preparation.

Phenol is a tackifier for increasing surface tackiness, and a phenol-formaldehyde-based resin may be used, and ESCO REZ 1203 is preferably used. EVA (Ethylene-Vinyl Acetate) is a material widely used in adhesives and is a copolymer of ethylene and vinyl acetate. Hot melt (VESTAMELT) or polyamide resta (POLYIMIDE RESTA), a material of hot melt (HM), is mixed well with a molten resin composition, and finely ground with an ink roller.

In this case, when using acrylic resin and PVC resin as the material of the stone, only polyamide rester is added as a hot melt material, and when using other materials such as PC, PS, and AS, bestamelt and polyamide rester are added together. .

An adhesive surface is formed on the bottom surface of the stone 22 by spraying the adhesive 29 prepared as described above to the bottom surface of the stone 22 using an adhesive spray gun or the like.

Next, as shown in FIG. 4, the stone connector 20 is dried by an infrared dryer 50 to dry the adhesive 29 applied to the stone 22. The drying process in the infrared dryer 50 takes about 15 seconds to 30 seconds at about 80 ° C. The stone is then placed on a drying stand to dry completely.

In such an adhesive drying process, it is preferable to set the hot air temperature differently according to the constituents of the stone connecting body 20 and the components of the adhesive, and to dry it, in the case of acrylic and PVC resin, about 50-80 ° C., more preferably. Is dried by hot air at about 60 ° C., and resins such as PC, PS, and AS are preferably dried by hot air at about 70-100 ° C., more preferably about 80 ° C. This is because the stone 22 is deformed or the adhesive 29 is not dried well unless it is dried with a proper hot air depending on the material.

After the adhesive drying process is completed, as shown in FIG. 5, the process of manufacturing the hotfix H is performed by separating each stone 22 from the gate part 24 in the stone connecting body 20 using the ultrasonic cutter 60. Is done. The ultrasonic cutter 60 is made to cut and separate only the stone 22 from the stone connecting body 20 by using ultrasonic energy of a strong energy momentarily. The ultrasonic cutter 60 vibrates about 8,000-15,000 times per second, so that only the stone 22 is separated from the overlying gate.

The hotfix H produced by the above method is injection molded of plastic resin such that the stone 22 decoration surface is formed in a polygonal shape and the bottom surface is formed in a plane. This hotfix (H) can be used only one or a plurality can be used as a set to form a specific pattern, the surface of the adhesive 29 is applied to a decorative object such as clothing, bags, etc. to provide a high temperature heat When the adhesive 29 is melted, the adhesive is attached to the decoration object, and then the adhesive 29 is cured, so that the hotfix H is completely attached to the decoration object, thereby beautifully decorating the appearance of the decoration object.

The stone and hotfix produced by the above-described method of the present invention reduce the conventional UV coating and aluminum deposition in one process, thereby greatly reducing cost and further improving productivity.

In addition, facility costs are reduced because the equipment required for both processes, UV coating and deposition, can be simplified. Therefore, it is possible to provide a cheap product by lowering the production cost.

Moreover, according to this invention, there exists an effect that each stone does not stick together by the action of the high elastic hardening | curing agent added to the adhesive agent. Therefore, there is no need for the effort of separating the adhered stones, of course, there is an effect of preventing the peeling of the ink layer applied with the adhesive, in some cases the adhesive when separating the adhered stones.

Claims (4)

Injection molding a plurality of stones using a plastic resin as a material for forming a stone; Spray coating a mixture of mirror ink and amyl on the back side of the stone; Preparing a resin composition comprising a urethane resin, a phenolic resin, EVA, a green oil, and a high elasticity hardener; Combining the resin composition with a hot melt to form an adhesive; Applying said adhesive to the back side of said stone; And Hot-roll manufacturing method comprising the step of drying the adhesive applied to the stone. The method according to claim 1, The method for producing a hotfix, characterized in that 3-10% by weight of amyl is added to the mixture of the mirror ink and amyl. The method according to claim 1 or 2, The adhesive includes 20-40% by weight of a urethane resin, 10-20% by weight of phenol resin, 30-50% by weight of EVA, 5-13% by weight of a high elasticity hardener, and 1-2% of copper green oil (methyl salicylate). It is an adhesive agent which mix | blends the resin composition comprised at a ratio of hot melt with a ratio of 6: 4-8: 2. The method according to claim 3, Hot-rolling manufacturing method characterized in that the high-elasticity curing agent contained in the resin composition is BRF.

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