JP2003306805A - Method for coating metal wire for holding shape of clothing, coating structure and coating material for the wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for coating a metal wire for holding the shape of a clothing, preventing the end part coated layer from deformation, etc., capable of securing sufficient strength and productivity and further without causing an environmental problem on burning treatment, and a coating structure. <P>SOLUTION: This method for coating a metal wire for holding the shape of a clothing comprises (S101) a whole-heating process of heating the whole metal wire, (S102) a whole-coating process of melting and attaching a powdery resin consisting mainly of a powdery thermoplastic resin or a thermoplastic resin on the whole surface area of the metal wire heated as a whole, (S103) an end part-heating process of heating the end parts of the wire, (S104) an end part-coating process of melting and attaching a powdery resin comprising a powdery thermoplastic resin, a powdery thermosetting resin or a thermoplastic resin on the heated end parts, (S106) a finish heating process of heating the whole wire completed with the whole-coating process and end part-coating process and (S107) a rapidly cooling process for rapidly cooling the wire completed with the finish heating process from a prescribed temperature. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a metal wire for clothing shape retention, a coating structure, and a coating material for a metal wire for clothing shape maintenance. More specifically, the present invention relates to a method of coating a metal wire for shape retention which is inserted and sewn into clothing such as a brassiere, a coating structure, and a powdery coating material used therefor.

[0002]

2. Description of the Related Art For example, in order to maintain the shape of a cup portion of a brassiere or body suit, a shape-retaining wire is formed into a substantially arc shape, and this wire is inserted into the edge of the cup and sewn. I often do it.

For example, as described in Japanese Utility Model Publication No. 7-26323, when an iron wire rod is used as the wire rod, the entire surface is coated with a resin in order to improve appearance and prevent rust. A layer is formed. Further, an end coating layer having a rounded tip is formed on the tip of the wire by setting the film thicker than the other portions. The edge covering layer is formed to prevent the wearer from feeling uncomfortable and to prevent the tip from breaking through the clothing.

As a method for forming the above-mentioned end coating layer, a method of laminating and applying a molten resin to the end after forming the entire coating layer, a method of applying a separately molded resin cap, and a method of forming the end of the wire rod There is known a method of inserting the mold into a mold to form an end coating layer on the end.

[0005]

However, it is difficult to form the end coating layer having a uniform thickness by the method of forming the end coating layer by laminating and coating the molten resin on the end portions. In some cases, powder resin is used to form the end coating layer, but the end of the wire is reheated to adhere the powder resin, and the surface of the adhered powder resin is made smooth. Therefore, it is necessary to perform finish heating. For this reason, a problem that a part of the coating layer is repeatedly heated and the surface is damaged or deformed easily occurs. In addition, the problem that the strength and washing resistance of the coating layer are deteriorated tends to occur.

In particular, the end coating layer and the overall coating layer must be integrally laminated, but depending on the resin used, it is difficult to secure the bonding strength between these coating layers. In some cases. Also, in order to perform finish heating, it is necessary to heat the whole while supporting or holding the wire on which the coating layer is formed by various methods, but the end coating layer having a large thickness is deformed or scratched. There was also the problem of being easy.

In the method of applying the separately molded resin cap, the number of steps for manufacturing the resin cap and the work of managing the parts are increased. In addition, since it is necessary to manually perform the deposition work, there is a problem that the number of steps is increased and the manufacturing cost is increased.

In the method of inserting the end portion of the wire into the forming die to form the end cover layer, equipment and a die for performing the end forming step are required. In addition, the number of working steps also increases.

As a coating material for the shape-retaining metal wire, a polyamide resin such as nylon, which is excellent in mechanical strength, chemical resistance and workability, is often adopted. However, since polyamide resin contains nitrogen atoms, it may generate toxic gas when incinerated, which is not preferable in terms of environment.

On the other hand, polyethylene terephthalate resin, which is known as a recycled resin and which is environmentally friendly because it does not generate a toxic gas even when incinerated, has been adopted in various fields. However, the polyethylene terephthalate resin has a strong crystallinity, and if it is repeatedly heated and cooled, it becomes brittle even if crystallization proceeds excessively. For this reason, it cannot be used for the metal wire for shape retention, in which the entire coating layer and the end coating layer have to be formed in an overlapping manner.

The present invention has been conceived under the above-mentioned circumstances, solves the above-mentioned conventional problems, can prevent deformation of the end coating layer, and has sufficient strength and productivity. (EN) A method and a structure for coating a metal wire for shape retention of clothing, which can be secured and does not cause an environmental problem even if it is incinerated.

[0012]

In order to solve the above problems, the present invention takes the following technical means.

The invention described in claim 1 of the present application is a method for coating a metal wire for shape retention of a clothing which is inserted into the clothing to maintain the shape of the clothing, and an overall heating step of heating the entire metal wire. And an entire coating step of melting and adhering a powdery thermoplastic resin or a powdery resin containing a thermoplastic resin as a main component to the entire surface of the metal wire which is entirely heated, and heating the end portion of the wire. An end heating step,
End part coating step of melting and adhering powdery thermoplastic resin, powdery thermosetting resin or powdered resin containing thermosetting resin to the heated end part, the whole covering step and the end part It comprises a finishing heating step of heating the entire wire that has finished the coating step, and a quenching step of rapidly cooling the wire that has finished the finishing heating step from a predetermined temperature.

The material of the metal wire to which the present invention is applied is not particularly limited. Not only ordinary structural carbon steel wire, but also stainless steel wire or alloy wire can be adopted. Moreover, the cross-sectional shape of the metal wire is not particularly limited. Further, the type of clothing in which the shape-retaining metal wire according to the present invention is used is not limited, and a brassiere,
It can be applied to various clothes such as girdles.

The whole heating step is performed in order to melt and adhere the powdery resin to the wire surface in the next whole covering step. The heating temperature is not particularly limited as long as it is a temperature at which the powdery resin can be melted and adhered in a required thickness.

An electrostatic coating method, a fluidized dipping method or the like can be adopted as a method for performing the above-mentioned whole coating step. Further, the particle size of the powdery resin is not particularly limited as long as it can form a coating layer having a required thickness on the surface of the metal wire.

In the overall coating step, a powdery thermoplastic resin or a powdery resin containing a thermoplastic resin as a main component is adopted. The thermoplastic resin is a resin that melts and flows when heated to exhibit plasticity, and in the present invention, a resin that solidifies at room temperature and exhibits mechanical strength and the like is selected. Examples thereof include nylon, polyethylene resin, and polyethylene terephthalate resin. The thermoplastic resin can be repeatedly heated and melted and cooled and cured, and is naturally cured when the temperature is lowered, so that it is easy to handle.

The powdery resin containing the thermoplastic resin as a main component is not limited to one containing a filler, a coloring agent, etc.,
Including those containing a thermosetting resin. The powdery thermosetting resin is a resin that is once in a molten state when heated to a predetermined temperature or higher, but hardens due to a chemical change over time. The cured resin does not become fluid even when heated again. Unsaturated polyester resins, alkyd resins, epoxy resins and the like are known as thermosetting resins, and are often used as adhesives and paints. By blending the powdery thermosetting resin with the powdery thermoplastic resin, the adhesive performance can be significantly improved.

By blending the thermosetting resin with the thermoplastic resin, the thermosetting resin component in the coating layer can be cured and the apparent shape retention strength of the coating layer can be increased. This makes it possible to effectively prevent the coating layer from being deformed and the surface of the coating layer from being damaged when repeatedly heated.

For example, as in the invention described in claim 6, 3 to 25 weight parts of the powdery resin containing the thermoplastic resin as a main component, the powdery thermoplastic resin and the powdery thermosetting resin are contained. % To be added. When the blending amount of the thermosetting resin is 3% by weight or less, sufficient adhesive strength and / or
Or shape retention cannot be obtained. On the other hand, when the entire coating layer is formed using a resin containing 25% by weight or more of a thermosetting resin, the heating time for curing the thermosetting resin becomes long, and it is necessary to uniformly heat the entire wire. Therefore, temperature management becomes complicated. In order to shorten the heating time and improve workability, it is more preferable to set the mixing ratio of the thermosetting resin to 3 to 15% by weight.

In the end heating step, the end of the metal wire is locally heated. The heating temperature may be set to a temperature at which the powder resin adopted in the next end portion coating step can be melted and adhered. Also in the edge coating step, as in the overall coating step, a method such as an electrostatic coating method or a fluidized dipping method can be adopted.

Depending on the resin used, the bonding strength between the overall coating layer and the end coating layer, which are formed in a laminated manner, cannot be obtained, and the problem that these coating layers peel off from each other tends to occur. In addition, the coating layer becomes thicker at the wire end. Therefore, the end coating layer is often deformed or damaged in the finish heating step or the like.

In the present invention, in order to solve the above problems, a powdery thermosetting resin or a powdery resin containing a thermosetting resin can be used for the end coating layer.

The powdery thermosetting resin melts once when heated to a temperature higher than a predetermined temperature, but it is hardened due to a chemical change after that and does not melt even if heated again. Also, the adhesive strength to other resins is high. Therefore, the above problem can be solved by adopting a thermosetting resin for the end coating layer. A thermoplastic resin can be used as long as it is a resin that can secure the above-mentioned bonding strength and the above-mentioned shape retention.

The end coating layer may be formed of not only a thermoplastic resin and a thermosetting resin, but also a resin obtained by mixing a thermosetting resin with another resin. By blending the thermosetting resin with the thermoplastic resin, the bonding strength between the entire coating layer and the end coating layer can be improved. That is, as in the invention described in claim 7, by using a powdery resin obtained by mixing powdery thermoplastic resin with powdery thermosetting resin in an amount of 3% by weight or more, bonding of the end coating layer is achieved. An effect of enhancing strength and shape retention can be expected. In order to secure sufficient shape-retaining property, it is preferable to mix powdery thermosetting resin in an amount of 5% by weight or more. On the other hand, when the blending ratio of the thermosetting resin increases, the time for curing also increases. In addition, it is necessary to sufficiently control the temperature and time. Therefore, in order to improve work efficiency, the mixing ratio of thermosetting resin should be 3% by weight.
It is preferably set to -25% by weight. It is possible to prevent the end coating layer from being deformed or damaged by performing the finishing heating step after the powdery thermosetting resin is cured to some extent. Also, handling becomes easy. Further, it is preferable to select, as the thermosetting resin, a resin whose curing acceleration temperature is lower than the coating processing temperature or the melting temperature of the thermoplastic resin.

The finish heating step is also performed to melt the powdery resin melted and adhered to the surface of the wire again to smooth the surface and to complete the hardening of the thermosetting resin. The heating temperature may be set to a temperature that can smooth the surface of the entire coating layer and increase the degree of curing of the thermosetting resin. On the other hand, in order to prevent crystallization, it is preferable to perform the finishing heating step at a temperature above the melting point and then perform the quenching step described below.

In the present invention, the wire is repeatedly heated to form the overall coating and the end coating. Therefore, a defect may occur in the coating layer that is repeatedly heated. In particular, when a crystalline resin such as polyethylene terephthalate resin is adopted, crystallization excessively progresses, the flexibility of the coating layer decreases, and the coating layer easily peels off from the wire body. The present invention solves the above problem by performing a quenching step.

The rapid cooling step is to rapidly cool the wire on which the entire coating layer and the end coating layer are formed from a predetermined temperature. In order to avoid crystallization, it is necessary to quench at least from a temperature higher than the crystallization temperature region of the resin, and it is preferable to quench from near the melting point.

The above quenching step may be carried out continuously from the finishing step, or may be carried out after re-heating the wire which has finished the finishing step to eliminate crystallization. By performing the above-mentioned rapid cooling step, it became possible to prevent crystallization and form an amorphous coating layer. In particular, when a polyethylene terephthalate resin or a resin containing a polyethylene terephthalate resin as a main component is adopted, a great effect is obtained.

In the present invention, as in the invention described in claim 2, the end heating step and the end coating step can be performed after the whole heating step and the whole coating step.

Further, as in the invention described in claim 3,
The whole heating step and the whole covering step can be performed after the end heating step and the end covering step.
That is, the entire coating can be formed after performing the end coating step. This makes it possible to form a seamless coating layer between the end coating and the overall coating,
The feeling of unity of the wire is improved and the appearance is also greatly improved.

The invention described in claim 4 of the present application includes an intermediate finish heating step of heating the entire wire after the overall coating step.

Since powder resin is used in the present invention, irregularities are likely to occur on the surface of the coating layer after melt adhesion.
If the edge heating step is performed in a state where these irregularities are present and the boundary region is unevenly heated, the surface may not be smoothed in the finishing heating step. By performing the intermediate finishing heating step, the surface can be smoothed before a complicated heat history occurs, and a good-looking coating layer with high surface accuracy can be formed. Further, when the entire coating layer is formed of a powder resin in which a thermosetting resin is mixed with a thermoplastic resin, the shape retention of the entire coating layer is enhanced by performing the intermediate finishing heating step. For this reason, it is possible to prevent the coating layer from being deformed in the subsequent heating step.

The invention according to claim 5 of the present application includes an end finishing heating step of heating the wire end portion after the end coating step.

The thermosetting resin has a characteristic that it is gradually cured from a molten state when heated and maintained at a temperature higher than a predetermined temperature. Therefore, similar to the above intermediate finishing heating step, before performing the overall finishing heating step, the surface of the end coating layer is smoothed and cured to form an end coating layer having high surface accuracy and shape retention. it can.

As the powdery thermoplastic resin, a thermoplastic polyester resin can be adopted. As the thermoplastic polyester resin, it is preferable to adopt a renewable saturated polyester resin such as polyethylene terephthalate resin or polybutylene terephthalate resin.

In the invention described in claim 9 of the present application, as the thermoplastic polyester resin, a powdery resin containing polyethylene terephthalate resin as a main component or a powdery resin containing polyethylene naphthalate resin as a main component is adopted. It was done. Polyethylene terephthalate resin and polyethylene naphthalate resin have mechanical strength, heat resistance,
Excellent water resistance. Moreover, unlike nylon resin, which does not contain a nitrogen component, no toxic gas is generated even when incinerated, and the environment is less harmful. In particular, polyethylene terephthalate resin is inexpensive and easy to adopt. Further, although resins having pure components can be used, resins containing these resins as a main component and a filler, a colorant, and other resins can also be used. For example, a pure polyethylene terephthalate resin can be blended with a reinforcing component that enhances the bonding strength. For example, the bonding strength can be increased by blending a thermoplastic resin having a melting point lower than that of polyethylene terephthalate resin. In addition, a drawdown improver such as styrene-glycidyl metalate may be added to improve the shape retention.

On the other hand, the polyethylene terephthalate resin and the polyethylene naphthalate resin are crystalline resins,
The characteristics change greatly depending on the heat history, and when repeatedly heated and gradually cooled, crystallization excessively progresses and the flexibility is lost.
Further, since it has a low bonding strength, it has never been used for double coating. In particular, in the present invention in which the end coating layer is formed on the end of the wire, since the end heating layer is formed by the conventional method because it includes at least two heating steps of the whole heating step and the end heating step, The coating layer loses flexibility,
When the metal wire is deformed, the coating layer easily peels off from the wire body.

In the present invention, the above problem is solved by performing a quenching step of quenching the wire from a heated state. Crystallization of polyethylene terephthalate resin is 130
Since the temperature greatly progresses in the range of ℃ to 170 ℃, the temperature may be rapidly cooled from near the melting temperature to room temperature so as to shorten the time in this temperature range. For example, it is possible to adopt a method of pouring into cooling water at the same time as the end of the finishing heating step, or blowing air of low temperature.

By rapidly cooling from the molten state, it becomes possible to amorphize the crystallized structure and to soften the coating layer.

As in the tenth aspect of the invention, a recycled resin can be adopted as the thermoplastic polyester resin. In particular, the polyethylene terephthalate resin and the polyethylene naphthalate resin are resins that are widely used in PET bottles and can be recycled.
In addition, recycling of these resins is desired. Regenerated polyethylene terephthalate resin or recycled polyethylene naphthalate resin is a resin whose main component is a recycled component obtained from a PET bottle or the like, and a binder and the like are mixed therein. Sufficient strength can be ensured even if the above-mentioned recycled resin is used. Further, by using a recycled product, it is possible to contribute to the recycling of the resin. It should be noted that it is preferable to use a binder that does not generate a toxic gas when incinerated as a binder or the like that is blended in addition to the polyethylene terephthalate resin and the polyethylene naphthalate resin.

In the invention described in claim 11, a powdered resin containing an unsaturated polyester resin as a main component is adopted as the thermosetting resin. The resin containing an unsaturated polyester resin as a main component is formed by adding a catalyst, a reaction accelerator and the like to the unsaturated polyester resin. Unsaturated polyester resin also does not generate toxic gas when incinerated. Further, the powdery unsaturated polyester resin can be melted and adhered to the end of the wire in the initial stage of heating, and the surface can be smoothed. Therefore, when the thermosetting resin is used, it is preferable to increase the shape retention strength by holding the surface at a temperature for smoothing for a predetermined time and then increasing the temperature to cure the surface.

A twelfth aspect of the present invention is a coating structure for a clothing-retaining metal wire inserted into clothing to maintain the shape of the clothing, wherein a thermoplastic resin is applied to the entire surface of the metal wire. Alternatively, a thermoplastic resin, a thermosetting resin, or a thermosetting resin is formed on at least one end portion of the wire with an entire coating layer formed by melting and adhering a powdery resin containing a thermoplastic resin as a main component. And an end coating layer formed by melting and adhering a powdery resin containing the same.

According to a thirteenth aspect of the present invention, the end coating layer is laminated so as to cover the entire coating layer. That is, the edge coating layer is formed after forming the overall coating layer.

According to a fourteenth aspect of the present invention, the entire coating layer is laminated so as to cover the end coating layer. That is, the overall coating layer is formed after forming the end coating layer. According to the invention of this claim, the boundary between the entire coating layer and the end coating layer is eliminated, and a coated wire having a good appearance can be formed.

According to a fifteenth aspect of the present invention, the powdery resin containing the thermoplastic resin as a main component is mixed with the powdery thermoplastic resin in an amount of 3 to 25% by weight of the powdery thermosetting resin. It has been configured.

The invention according to claim 16 of the present application is constituted by mixing the powdery resin containing the thermosetting resin with a powdery thermoplastic resin in an amount of 3% by weight or more of the powdery thermosetting resin. It was done. In order to improve workability, it is preferable to set the mixing ratio of the powdery thermosetting resin to 3 to 25% by weight.

According to a seventeenth aspect of the present invention, a thermoplastic polyester resin is adopted as the thermoplastic resin.

As the thermoplastic polyester resin, a resin containing a polyethylene terephthalate resin as a main component or a resin containing a polyethylene phthalate resin as a main component can be adopted as in the invention described in claim 18.

In the invention described in claim 19, a recycled resin is adopted as the thermoplastic polyester resin.

According to a twentieth aspect of the invention, a resin containing an unsaturated polyester resin as a main component is adopted as the thermosetting resin.

The invention as set forth in claim 21 of the present application is a coating material for a clothing-maintaining metal wire to be inserted into a clothing to maintain the shape of the clothing, comprising a powdery thermoplastic resin as a main component. And 3% by weight or more of powdery thermosetting resin.

By blending the powdery thermoplastic resin with the powdery thermosetting resin, the bonding strength to the wire surface and other coating layers is significantly increased. Therefore, the joint strength between the coated layers when laminated and coated is also increased. Further, since the thermosetting resin is cured, the shape retention property during the work such as the finishing heating step is improved, and it is possible to effectively prevent the deformation and the surface from being scratched.

When the blending ratio of the powdery thermosetting resin is high, the curing time becomes long and the temperature and time must be controlled. Therefore, as in the invention described in claim 22, the powdery thermosetting resin is contained in an amount of 3% by weight to 25% by weight.
It is preferably blended in a weight percentage.

According to the twenty-third aspect of the present invention, the thermosetting acceleration temperature of the powdery thermosetting resin is lower than the coating processing temperature or melting temperature of the powdery thermosetting resin. It is preferable to adopt it. The thermosetting resin can be cured while the thermoplastic resin retains its shape-retaining property to enhance the shape-retaining property of the coating layer in the subsequent heating step.

According to a twenty-fourth aspect of the present invention, a powdery thermoplastic polyester resin is adopted as the powdery thermoplastic resin, and a powdery thermosetting polyester is used as the powdery thermosetting resin. It uses resin.

In the invention described in claim 25 of the present application, a recycled resin is adopted as the powdery thermoplastic resin.

[0058]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below.

As shown in FIG. 1, the shape-retaining wire 3 is inserted along the lower edge of the cup portion 2 of the brassiere 1.
1 and 2, the present invention is applied to the shape-retaining wire 3 of the brassiere 1, but the present invention is applied to the shape-retaining wire of other clothes such as girdles. You can also do it.

As shown in FIGS. 2 and 7, the shape-retaining wire 3 is formed on a wire main body 4 in which a structural carbon steel wire having a rectangular cross section is formed into a substantially arc shape, and on the entire surface of the wire main body 4. And the end cover layers 6 formed on both ends of the wire body 4 so as to overlap each other.

The overall coating layer 5 is formed by using a polyethylene terephthalate resin recycled by recycling. The end coating layer 6 is also made of recycled polyethylene terephthalate resin containing a thermosetting unsaturated polyester resin.

The recycled polyethylene terephthalate resin is crushed from used PET bottles and the like to remove impurities, and a modified polyester resin, a maleic anhydride modified polyolefin resin or the like is added as a binder and melt-kneaded to form pellets. The pellets are crushed into powder. In the embodiment, the pellet of the recycled polyethylene terephthalate resin is 100 to 250 μm.
What was formed by crushing to the particle size of was used.

The recycled polyethylene terephthalate resin can be formed by adding 3 to 40 parts by weight of the binder to 100 parts by weight of recycled resin. The recycled polyethylene terephthalate resin that can be used is not limited to the above, and recycled polyethylene terephthalate resin that has been recycled by various methods can be used.

The modified polyester resin blended as the binder in the present embodiment is 40% by weight of polyethylene terephthalate resin, 40% by weight of polybutylene terephthalate resin and 20 low molecular weight olefin wax.
It can be formed by mixing with wt%. On the other hand, the maleic anhydride-modified polyolefin resin contains 10 to 40 parts by weight of maleic anhydride in 100 parts by weight of a low molecular weight olefin resin.
It can be formed by kneading parts by weight.

In the present embodiment, the powdery recycled polyethylene terephthalate resin formed as described above is
The surface of the shape-retaining wire is coated by the fluid immersion method.

The resin used for the entire coating layer is not limited to the above-mentioned recycled polyethylene terephthalate resin, and powdered resin formed by crushing virgin polyethylene terephthalate resin can also be used.

The polyethylene terephthalate resin is tough, has excellent heat resistance and weather resistance, and has low water absorption. Moreover, even if incinerated, no toxic gas such as nitrogen gas is generated. Further, since it is a recyclable resin, development of applications for the regenerated resin is desired.

On the other hand, the polyethylene terephthalate resin has a high crystallinity, and if the crystallization proceeds excessively, the flexibility decreases, and the coating layer may peel off from the wire surface when the wire bends. The crystallization is likely to occur when the cooling rate is slow as in the case of natural cooling. Especially 130 ~
If the time in the temperature range of 170 ° C. is long, the crystallization proceeds excessively and the flexibility is greatly reduced. Further, in the present embodiment, since heating and cooling are performed twice or more to form the entire coating layer and the end coating layer, the thermal history of the coating layer formed earlier becomes non-uniform and partial Crystallization is easy to proceed. Therefore, the polyethylene terephthalate resin has not been laminated and coated so far.

Moreover, since the end coating layer 6 has a structure in which it is laminated on the entire coating layer 5, when a conventional thermoplastic resin is used, it is easily deformed due to contact with foreign matter, It was difficult to keep the morphology inside.

According to the present invention, the above-mentioned problems are solved, and the end coating layer 6 is laminated on the entire coating layer 5 using an environment-friendly recycled polyethylene terephthalate resin.

The method for forming the coating structure according to the present invention will be described below with reference to the flowchart.

FIG. 3 shows a flow chart according to the first embodiment of the coating method according to the present invention.

First, as shown in FIG. 5, a structural carbon steel wire is formed into an arc shape, and the wire body 4 is quenched.
The whole heating process of heating the whole is performed (S101). The heating temperature may be set to a temperature at which the powdery resin is melted and adhered to the surface of the wire body 4. In this embodiment,
Heat to 430-480 ° C.

The heated wire body 4 is put into a fluidized dipping tank filled with the powder resin, and a whole coating process is performed (S102). The fluidized dipping tank blows air from below to fluidize the powder resin, and a known device can be used. In the fluid immersion tank, the powdery resin that contacts the wire body 4 is melted to form the entire coating layer 5 that covers the entire surface of the wire body 4. In addition, the wire body 4 and the overall coating layer 5 are cooled to about room temperature during the overall coating step. As a result, as shown in FIG. 6, a shape-retaining wire in which the entire covering layer 5 is formed on the entire surface of the wire body 4 is formed. In this state, the surface of the entire coating layer 5 has irregularities formed by the powdery resin.

Next, an end heating step of reheating both ends of the wire on which the overall coating layer 5 is formed is performed (S10).
3). Since the wire body 4 and the entire coating layer 5 are cooled, it is possible to hold the middle portion of the wire and easily heat only the end portion. The heating temperature is set to a temperature at which the powdery resin of the end coating layer to be subsequently applied can be melted and adhered. In this Embodiment, it heats at 430-480 degreeC similarly to the said whole coating process.

Next, both ends of the wire main body 4 on which the entire coating layer 5 is formed are inserted into a fluidized dipping bath, and powdered resin is welded to the ends to form the end coating layer 6. Is performed (S104).

In the present embodiment, the end coating step (S10
In 4), a powdery resin containing a powdery thermosetting polyester resin is adopted. The powdery thermosetting polyester resin is solid at room temperature and is softened or melted by heating, but curing is accelerated when the temperature exceeds a predetermined temperature. In the embodiment, a powdered recycled polyester terephthalate resin that constitutes the overall coating layer 5 is blended with 7% by weight of a powdered unsaturated polyester resin. By blending the above-mentioned powdery unsaturated polyester resin, it becomes possible to significantly increase the bonding strength to the entire coating layer 5.

After the end coating layer 6 is formed, an end finishing heating step of holding at least the curing temperature of the thermosetting polyester resin for a predetermined time is performed (S105).
In the present embodiment, the wire end is held for 30 to 120 seconds while being heated to 320 to 450 ° C. In the end finishing heating step, the surface of the powdery unsaturated polyester resin is smoothed and cured. In the end finishing step, it is not necessary to completely cure the thermosetting resin component in the end coating layer 6. In the next overall coating step or finishing heating step, it is sufficient to cure the resin to such an extent that deformation or the like is unlikely to occur.

After the end finishing heating step is completed, a finishing heating step of heating the entire wire is performed (S106). The finish heating step is performed in order to improve the surface accuracy by eliminating the irregularities of the overall coating layer 5 and to complete the curing of the end coating layer 6. In the present embodiment, the entire wire is heated to 260 to 300 ° C. and held for 40 to 80 seconds.

In this embodiment, since the unsaturated polyester resin component in the end coating layer 6 is cured to some extent,
Not easily deformed or scratched. Therefore, even if the wire is placed on a belt or the like and the finishing heating step is performed, the end coating layer 6 is not easily deformed. It is also possible to carry out the finishing heating step while holding the end coating layer 6.

Next, a quenching step of quenching the wire which has finished the finishing heating step is performed (S107). The quenching step in the present embodiment is carried out, following the finish heating step, by pouring the wire into water and quenching it to room temperature before the temperature of the wire is lowered. In the present embodiment, since the coating layer containing polyethylene terephthalate resin as the main component is formed, the water resistance is high, and the water is hardly absorbed by the coating layer even when cooled with water. The quenching step may be performed after heating is performed separately from finish heating. Further, in the case of a resin that cannot be water-cooled, the quenching step can be performed by blowing cooled air.

Crystallization of the polyethylene terephthalate resin proceeds in the temperature range of 130 to 170 ° C. For this reason, it is preferable to quickly pass through the above temperature range for cooling. When another resin is used, the temperature range in which the crystallization is promoted is different, and the quenching start temperature is different depending on the resin used.

Upon rapid cooling, crystallization is not promoted and a flexible coating layer is formed. Therefore, even if the wire body bends,
There is no risk of the coating layer peeling off the wire.

After the rapid cooling step, a drying step for drying the wire is performed (S108). In the present embodiment, this is performed by blowing dry air at room temperature.

As shown in FIGS. 8 and 9, in the coating structure formed by the above method, the entire coating layer 5 is formed on the entire surface of the wire body 4, and the end portions are formed at both ends of the wire body 4. The coating layer 6 is formed by laminating on the overall coating layer 5.

FIG. 4 shows a second embodiment of the present invention. The coating structure of the wire in the present embodiment is the same as that in the first embodiment, and the description thereof will be omitted.

In the present embodiment, the whole covering step (S20
After 2), the intermediate finishing heating step (S203) is performed. By performing the intermediate finishing heating step, the unevenness of the entire coating layer 5 can be smoothed and the surface accuracy can be improved. In the present embodiment, the temperature is about 30 to 260 to 320 ° C.
Hold 60 seconds.

Since the polyethylene terephthalate resin is a crystalline resin, the melting point rises or the time until it melts increases as the crystallization progresses. Therefore, by performing the intermediate finish heating step, it is possible to improve the surface accuracy and improve the shape retention of the entire coating layer, and prevent deformation of the entire coating in the edge heating step and the finishing heating step. .

Further, in the present embodiment, as the resin constituting the overall coating layer 5, the recycled polyethylene terephthalate resin of the first embodiment is blended with about 5% by weight of a powdery unsaturated polyester resin. . By blending the powdery unsaturated polyester resin, it is possible to significantly increase the bonding strength of the entire coating layer 5 to the wire body 4. By performing the intermediate finishing step, the powdery unsaturated polyester resin which is a thermosetting resin is cured in the recycled polyethylene terephthalate resin which is a thermoplastic resin. Thereby, even if the recycled polyethylene terephthalate resin is softened, the shape retention property of the entire coating layer 5 is significantly improved.

The thermosetting resin component in the end coating layer 6 does not have to be completely cured in the end finishing heating step, and it is sufficient to ensure shape retention sufficient to hold it in the finishing heating step. It suffices if it can be completely cured in the heating step (S207).

10 to 14 show a third embodiment of the present invention.

As shown in FIGS. 11 and 12, in this embodiment, the end coating layer 16 is first formed on the wire body 14, and then the overall coating layer 15 is formed.

FIG. 10 shows a flowchart of the method for coating the shape-retaining wire according to the present embodiment.

As shown in this figure, first, the wire body 14
An end heating step of heating the end is performed (S301). The heating temperature in the edge heating step is set to 430 to 480 ° C. as in the first embodiment. Since only the end portion is heated, it is difficult to heat it to a uniform temperature, and it is preferable to set the temperature to a temperature slightly higher than when heating the entire wire.

An end coating step of immersing the end of the wire body 14 heated in the end heating step in a fluidized dipping tank filled with powdery resin is performed (S302). Similarly to the above-described embodiment, the resin used in the end coating step is unsaturated polyester resin, or recycled polyethylene terephthalate resin containing 3% by weight of unsaturated polyester resin.
It is possible to use a mixture of the above. Further, after the end coating process is completed, the end finishing heating process may be set to improve the shape retention of the end coating layer before the whole heating process.

After the end coating step is completed, the whole heating step is performed (S303). In the overall heating step, the edge covering layer can be cured to improve shape retention.

Next, a whole coating step is carried out in which the wire heated in the above whole heating step is put into the fluidized immersion tank (S304). In the overall coating step, the powdery resin is melted and adhered to the entire surface of the wire.

Next, an overall finish heating step of heating the entire wire is performed (S305). Also in this embodiment, since the shape retention of the end coating layer is improved, it is possible to prevent the end coating layer from being deformed in the entire finishing heating step. By performing the overall heating step, it is possible to remove the irregularities on the surface of the overall coating layer 15 and improve the surface accuracy, as in the above-described embodiment.

Then, similarly to the above-described embodiment, the rapid cooling step (S306) and the drying step (S307) are performed.

As shown in FIGS. 13 and 14, the shape-retaining wire 13 manufactured by the method according to the third embodiment.
The entire coating layer 15 is formed outside the end coating layer 16. Therefore, unlike the first embodiment, there is no boundary between the end coating layer 16 and the overall coating 15, and the appearance is good.

The present invention is not limited to the above embodiments. In the embodiment, the recycled polyethylene terephthalate resin in which the thermosetting resin is mixed is used for the entire coating layer, but virgin powdered polyethylene terephthalate resin can be used. Further, a colorant, an antibacterial agent, or the like can be added to the resin.

Further, in the present embodiment, the present invention is applied to the shape-retaining wire of the brassiere, but the present invention can also be applied to the shape-retaining wire used for other clothing such as a girdle.

Further, in the embodiment, the end coating layer is formed by the resin in which the unsaturated polyester resin is mixed with the recycled polyethylene terephthalate resin, but the entire coating layer and the end coating layer are formed only by the recycled polyethylene terephthalate resin. You can also do it.

In this embodiment, the powdery polyethylene terephthalate resin is mixed with the powdery unsaturated polyester resin in order to improve the bonding strength and the shape retention.
Other resins may be added as the improver.

By adding a resin having a melting point lower than that of the polyethylene terephthalate resin, for example, a powdery polyethylene resin, a powdery polypropylene resin, a powdery vinyl resin or the like as an improving agent, the bonding performance can be enhanced. On the other hand, in order to improve the shape retention, a drawdown improver such as styrene-glycidyl metalate and various reinforcing agents for enhancing the shape retention can be added.

[Brief description of drawings]

FIG. 1 is an external view of a brassiere into which a metal wire for shape retention according to the present invention is inserted.

FIG. 2 is a front view of a clothing shape retention wire inserted into the brassiere shown in FIG.

FIG. 3 is a flowchart showing a first embodiment of a coating method according to the present invention.

FIG. 4 is a flowchart showing a second embodiment of a coating method according to the present invention.

FIG. 5 is a front view of a metal wire to which the present invention is applied.

6 is a front view showing a state in which an overall coating layer is formed by the coating method of FIG. 3 or FIG.

7 is a front view showing a state in which an end coating layer is formed by the coating method of FIG. 3 or FIG.

8 is a cross-sectional view taken along the line VIII-VIII in FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a flowchart showing a third embodiment of the coating method according to the present invention.

11 is a front view showing a state in which an end coating layer is formed by the coating method shown in FIG.

12 is a front view showing a state in which an overall coating layer is formed by the coating method shown in FIG.

13 is a sectional view taken along line XII-XII in FIG.

14 is a cross-sectional view taken along line XIV-XIV in FIG.

[Explanation of symbols]

S101 Whole heating process S102 Whole coating process S103 Edge heating process S104 Edge coating process S106 Finish heating process S107 Quenching process

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C09D 167/00 C09D 167/00 167/06 167/06 201/00 201/00 F term (reference) 4D075 AE04 BB18Z BB23X BB26Y BB29Y BB93Y CA13 CA44 CA48 DA01 DA34 DB02 DB04 DC38 EA02 EA17 EA19 EB13 EB20 EB33 EB35 EB36 EB39 EB53 EB56 4J038 DB002 DD061 DD071 DD122 DD182 MA02 NA11 NA27 PA19 PB02 PC02

Claims (25)

[Claims] 1. A method of coating a metal wire for shape retention, which is inserted into clothing to maintain the shape of the clothing, comprising: a whole heating step of heating the entire metal wire; The entire coating process of melting and adhering the powdery thermoplastic resin or the powdery resin containing thermoplastic resin as a main component on the entire surface of the wire, the end heating process of heating the end of the wire, and the heating process The end portion coating step of melting and adhering the powdery thermoplastic resin, the powdery thermosetting resin or the powdery resin containing the thermosetting resin to the end portion, and the overall coating step and the end coating step. A coating method for a metal wire for clothing retention, comprising: a finish heating step of heating the finished whole wire; and a quenching step of quenching the wire finished the finish heating step from a predetermined temperature. 2. The method for coating a metal wire for clothing retention according to claim 1, wherein the end heating step and the end coating step are performed after the overall heating step and the overall coating step. 3. The method for coating a metal wire for clothing retention according to claim 1, wherein the whole heating step and the whole covering step are performed after the end heating step and the end covering step. 4. The coating method for a metal wire for clothing retention according to claim 1, further comprising an intermediate finishing heating step of heating the entire wire after the overall coating step. 5. The method for coating a metal wire for clothing retention according to claim 1, further comprising, after the end coating step, an end finishing heating step of heating the wire end. 6. The powdery resin containing the thermoplastic resin as a main component is formed by mixing 3 to 25% by weight of a powdery thermosetting resin. A method for coating a metal wire for shape retention according to item 5. 7. The powdery resin containing the thermosetting resin,
The coating method for a metal wire for clothing retention according to any one of claims 1 to 6, wherein the powdery thermoplastic resin is mixed with 3% by weight or more of a powdery thermosetting resin. 8. The method for coating a metal wire for clothing retention according to claim 1, wherein the powdery thermoplastic resin is a thermoplastic polyester resin. 9. The clothing according to claim 8, wherein the thermoplastic polyester resin is a powdered resin containing a polyethylene terephthalate resin as a main component or a powdered resin containing a polyethylene naphthalate resin as a main component. Forming metal wire coating method. 10. The method of coating a metal wire for shape retention according to claim 8, wherein the thermoplastic polyester resin is a recycled resin. 11. The metal wire for clothing retention according to claim 1, wherein the powdery thermosetting resin is a powdery resin containing an unsaturated polyester resin as a main component. Coating method. 12. A coating structure for a clothing-retaining metal wire, which is inserted into clothing to retain the shape of the clothing, comprising a thermoplastic resin or a thermoplastic resin as a main component over the entire surface of the metal wire. The entire coating layer formed by melting and adhering the powdery resin, and the powdery resin containing the thermoplastic resin, the thermosetting resin, or the thermosetting resin is melted and adhered on at least one end of the wire. A coating structure for a metal wire for shape retention of clothes, comprising: 13. The coating structure for a metal wire for shape retention according to claim 12, wherein the end coating layer is laminated so as to cover the entire coating layer. 14. The coating structure for a metal wire for shape retention according to claim 12, wherein the overall coating layer is laminated so as to cover the end coating layer. 15. The powdery resin containing the thermoplastic resin as a main component is formed by mixing 3 to 25% by weight of the powdery thermosetting resin with the powdery thermoplastic resin. 15. The coating structure for a metal wire for shape retention according to any one of claims 1 to 14. 16. The powdery resin containing the thermosetting resin is formed by mixing powdery thermoplastic resin with powdery thermosetting resin in an amount of 3% by weight or more. 15
5. The coating structure for a metal wire for clothing retention according to any one of 1. 17. The coating structure of a metal wire for clothing retention according to claim 12, wherein the thermoplastic resin is a thermoplastic polyester resin. 18. The coating structure for a metal wire for clothing retention according to claim 17, wherein the thermoplastic polyester resin is a resin containing polyethylene terephthalate resin as a main component or a resin containing polyethylene phthalate resin as a main component. . 19. The coating structure for a clothing shape-retaining metal wire according to claim 17, wherein the thermoplastic polyester resin is a recycled resin. 20. The coating structure for a metal wire for shape retention according to claim 12, wherein the thermosetting resin is a resin containing an unsaturated polyester resin as a main component. 21. A coating material for a shape-preserving metal wire to be inserted into a clothing to maintain the shape of the clothing, comprising a powdery thermoplastic resin as a main component and a powdery thermosetting resin. Metal wire coating material for clothing shape retention, containing 3% by weight or more. 22. The powdery thermosetting resin in an amount of 3% by weight to
The coating material for a metal wire for shape retention according to claim 21, which is blended in an amount of 25% by weight. 23. The thermosetting acceleration temperature of the powdery thermosetting resin is lower than the coating processing temperature or melting temperature of the powdery thermoplastic resin according to claim 21 or 22. Metal wire coating material for shape retention. 24. The powdery thermoplastic resin is a powdery thermoplastic polyester resin, and the powdery thermosetting resin is a powdery thermosetting polyester resin. A coating material for a metal wire for shape retention according to any one of 1. 25. The coating material for a metal wire for shape retention according to any one of claims 21 to 24, wherein the powdery thermoplastic resin is a recycled resin.