WO2016153216A1

WO2016153216A1 - Method for laminating and bonding sponge and leather material at low temperature using hot pressing

Info

Publication number: WO2016153216A1
Application number: PCT/KR2016/002651
Authority: WO
Inventors: 유광윤
Original assignee: 주식회사 유엠에스
Priority date: 2015-03-24
Filing date: 2016-03-16
Publication date: 2016-09-29
Also published as: KR101529459B1

Abstract

The present invention relates to a method for laminating and bonding a sponge and a leather material at a low temperature using hot pressing, comprising: a first process for manufacturing a laminated material of a sponge and a web film by bonding the web film on the sponge; and a second process for bonding leather on the laminated material of the sponge and the web film, which has been obtained in the first process. According to the present invention, the original shape of the leather can be maintained without damage to the quality of the leather by using a low-temperature hot pressing method at room temperature instead of using a heating-furnace pass method. Further, the process can be easily controlled by interposing the web film, which is melted at a relatively low temperature and has a strong adhesive force, between the sponge and the leather and then performing a hot pressing method using a relatively low temperature, such as hot air, instead of directly heating the bonding surface therebetween at a high temperature using a flame. In addition, since the leather is directed upward in the manufactured laminated material of the sponge and the leather, a continuous cutting operation can be easily performed and an automatic cutting process is also possible so that it is possible to remarkably increase a production rate and significantly reduce a quality failure.

Description

Low Temperature Laminating Bonding Method of Sponge and Leather Fabric by Hot Pressing

The present invention relates to a low temperature laminating bonding method of a sponge and a leather fabric using hot pressing, and more particularly, in the bonding of a sponge and a leather fabric through a web film, a laminating bonding method using heat pressing The present invention relates to a method of joining a sponge and a leather fabric, which can maintain the original shape, performance and quality, and at the same time, automatically cut the leather, thereby significantly improving productivity.

In general, laminating refers to a method of bonding raw materials and subsidiary materials using adhesive resin and heat. When manufacturing automobile seats, raw materials such as natural leather or artificial leather are used. Use paper.

Two kinds of laminating bonding methods are used.

That is, the first is a hot melt method, as described in Korean Patent Laid-Open Publication No. 10-1996-0017143, a hot melt adhesive is applied to a sponge and dried, and then pressurized in a heating furnace together with leather to be bonded. That's how.

The hot melt method should be heated and pressurized for about 30 seconds at 140 to 180 ° C. due to the characteristics of the hot melt adhesive. Under such high temperature and pressurized conditions, the leather is hardened, the stiffness is reduced, the elasticity is reduced, and the stiffness is greatly reduced.

In addition, in some technologies, rather than applying hot-melt on a sponge, a leather (cut leather) is placed on the web film in a laminated state and passed through a heating furnace to bond the leather and the sponge by melting the web film. Although the method is also used, this also has to maintain the internal temperature of the furnace high enough to melt the hot melt, there is the same problem that the leather is hardened quality is poor.

Therefore, a low temperature bonding method was introduced to bond the sponge and the leather, and in this way, a heating laminating method performed at room temperature is frequently used.

The heating laminating method is a method of bonding a sponge to leather by pressing a pair of rollers while pressing and melting the surface of the sponge with a flame or the like, and attaching the liquid adhesive produced by the heating to the back of the leather. Republic of Korea Utility Model Registration No. 20-0346633, Republic of Korea Patent No. 10-1276931, Republic of Korea Patent No. 10-1270720)

When the sponge is bonded to the leather by the heating lamination, the cushioning and elasticity of the leather are improved. Therefore, when used in elastic parts such as the seat cushion (bottom) and the seat back (back) of the car seat, the effect of improving wearability and riding comfort Bring it.

However, the method disclosed in the above patents and utility models is a method of supplying a sponge onto the leather (leather cut in the shape of a sheet), but the surface to be bonded is melted by applying heat such as a flame, and then supplied to a roller and bonded to the leather In order to completely bond the leather and the sponge, the surface of the sponge must be melted by applying a high temperature heat such as a flame so that even a skilled worker has a problem in that process control is not easy.

In addition, the conventional flame lamination method is difficult to obtain a uniform product because the thickness of the sponge is severely reduced, and there is a disadvantage of cost increase because a thicker one must be used as the sponge used for the first time, and LPG, etc. There is a problem in that a large amount of cost is required to install a facility such as a duct for collecting and discharging harmful gas generated by melting the sponge.

In addition, since the heating means are disposed below the sponge so that heat such as flame can be effectively transferred to the sponge, the leather is supplied to the lower part of the sponge (see FIG. 2). Since the leather piece is cut in the shape of a sheet, the leather is located at the bottom, so the position of the leather is not visible from above, so it is difficult to perform the cutting work directly. There is a downside to falling.

The present invention has been newly developed in consideration of the above-described prior art situation, and uses a hot pressing method performed at room temperature without using a heating furnace passing method using a hot-melt method in bonding leather and sponge. The quality of the leather is kept intact and the shape of the leather is maintained, while the sponge and the joint surface of the leather are heated at a high temperature without using a flame or the like, and the web film is melted at a relatively low temperature and has a strong adhesive force therebetween. It is easy to control the process by using a heat compression method using a relatively low temperature such as, and direct cutting operation because the leather is directed upward in the bonded fabric of the manufactured sponge and leather (especially, the leather piece cut into sheet shape). Is easy to carry out, and the automatic cutting process is also possible, which can dramatically increase the production speed. The proposed technology.

The present invention to achieve the above object

A process of simultaneously supplying a web film and a sponge fabric to a pair of rollers, and bonding the web film to the roller by applying heat to the bonding surface of the sponge fabric by using a heating means. A first step of bonding the film and the sponge fabric; And

While supplying the bonding fabric of the web film and the sponge fabric obtained by the first step to the pair of rollers in a state where the web film is directed upward, the leather is supplied to the upper portion of the bonding fabric of the web film and sponge fabric Supplying a release film to the upper portion of the leather to bond the leather on top of the bonding fabric of the web film and sponge fabric, the bonding of the web film and sponge fabric before the bonding fabric of the web film and sponge fabric is in contact with the leather A second step of bonding the leather to the upper part of the bonding fabric of the web film and the sponge fabric by applying heat to the fabric using indirect heating means to supply the web film in a molten state;

It provides a laminating bonding method of the sponge and leather fabric using a hot pressing, characterized in that configured to include.

In a preferred embodiment according to the invention, the leather is a leather piece (piece) or roll of artificial leather made of natural leather or artificial leather, the sponge is a general urethane sponge, filter foam, lamination foam (lamination foam), Non-lamination foams and the like can be used.

In a preferred embodiment according to the present invention, in the case of using the laminate foam as the sponge, the second process may be performed directly without bonding the web film in the first process.

In addition, in a preferred embodiment according to the present invention, the indirect heating means may use a hot air fan or an infrared (IR) heater.

In addition, in a preferred embodiment according to the present invention, the indirect heating means is characterized in that to apply heat so that the temperature supplied to the web film is 120 ~ 180 ℃.

In addition, in a preferred embodiment according to the present invention, after the second process is added an automatic cutting process for cutting the rim in the form of the actual product in the bonded fabric of the web film and the sponge fabric and the final fabric bonded the leather It can be included as.

Features and advantages of the low temperature laminating bonding method of the sponge and leather fabric using the hot pressing according to the present invention are as follows.

1. First, in the bonding of leather and sponge, hot pressing is performed at room temperature without using a method of applying hot-melt and passing through a heating furnace or passing a heating furnace while laminating web films. By using the method, the leather is not subjected to a high temperature environment and the original performance can be maintained without causing quality damage such as hardening or weakening of the leather.

2. In addition, the hot pressing method using a relatively low temperature, such as hot air, may be carried out by interposing a web film having a strong adhesive force between the sponge and the leather by melting it at a relatively low temperature without directly heating it to a high temperature using a flame or the like. The advantage is that it is easy to control.

3. The sponge and leather are laminated at a relatively low temperature using indirect heat such as hot air, rather than melting the sponge by using a high temperature such as a flame to form a slime component. Therefore, there is no need to use a thick one as a sponge used for the first time, so there is no problem of cost increase, and since it does not use fuel such as LPG to generate sparks, it is not necessary to have a facility for this, and that the sponge melts. Therefore, there is an advantage that a facility such as a duct for collecting and discharging harmful gas when the sponge melts is not required.

4. In addition, since the leather is facing upward in the fabric of the fabric of the sponge and the leather (particularly, the leather piece cut into sheet shape), the cutting operation can be performed immediately after the bonding. When added, automatic cutting is also possible, which can dramatically increase production speed.

1 is a view showing the lamination bonding of leather and sponge by a heating furnace bonding method according to the conventional method.

2 is a view showing a laminating bonding method of leather and sponge according to the conventional method.

Figure 3a is a view showing a first step of laminating a sponge fabric and a web film in the laminating bonding method of leather and sponge according to an embodiment of the present invention.

3B is a view showing a second step of laminating and bonding the bonding fabric and leather of the web film and sponge fabric in the laminating bonding method of leather and sponge according to an embodiment of the present invention.

4 is a view showing that the automatic cutting process is added after the second step in the laminating bonding method of leather and sponge according to an embodiment of the present invention.

The present invention will be described in more detail with reference to the drawings as follows.

As shown in FIG. 1, the conventional method applies a hot-melt 11 on a sponge 10 by means of a furnace bonding method and places a leather (eg, a piece of leather cut into sheet shapes) 12 thereon. ) Is laminated and passed through the heating furnace 13, in which case the leather is cured under high temperature conditions in the heating furnace, the elasticity is lowered and becomes stiff, thereby degrading the merchandise.

The conventional method of FIG. 2 is a method of joining at room temperature by pressurizing by passing a roller along with the back of the leather 21 in a state in which the sponge 20 is heated and melted, using a heating means 22 such as a flame ( 20) is a method of bonding the leather 21 placed on the release film 23 at the bottom of the melted state. In this method, a pair of rollers 24-24 are used in which heat from the flame is normally transferred upward, and the heating means 22 is disposed near the sponge 20, preferably under the sponge, and the leather is placed on the release paper. 1, 24-2) to bond the sponge with the leather. As such, in the conventional method, since the surface of the sponge must be sufficiently dissolved to form a liquid adhesive, the heating temperature of the heating means must be very high. Therefore, a direct heating method such as a flame is usually used. Use

In addition, in the conventional method, the sponge is usually supplied upward and the leather is supplied downward. Accordingly, the spliced fabric obtained by joining the sponge and the leather has a sponge on the upper side and a leather on the lower side, making it difficult to easily locate the leather on the upper side. do. Therefore, in order to manufacture the final product by cutting into the shape of leather, the joining fabric is turned upside down to make the leather visible, and in that state, the leather is cut into the shape of the actual product. There is a very slow problem.

On the other hand, the Applicant has a technology for heating the upper portion of the sponge fabric by the heating means and injecting the leather (sheet fabric) over the heated sponge fabric through a pre-registered patent (Korean Patent No. 10-1270720). I have suggested. However, the heating means used here was not high because it was located on top of the sponge to heat the sponge from above.

The present invention is the result obtained after endless research and development in order to solve the problems or limitations in the techniques proposed by the present applicant (Korean Patent Nos. 10-1276931 and 10-1270720). The technology was developed to significantly increase the.

Laminating bonding method of the sponge and the leather fabric according to the present invention comprises a two-step process of the first step and the second step, the first step is a step of manufacturing a bonding fabric of the sponge and the web film by bonding the web film to the sponge And the second step is a step of bonding leather to the bonding fabric of the obtained sponge and web film.

Although the present invention consists of a two-step process, both the first process and the second process can be performed continuously, and the production process is very high since the cutting process after the second process can proceed very quickly.

As shown in FIG. 3A, the first process of the present invention is a process of simultaneously supplying and bonding a web film 31 and a sponge 32 fabric to a pair of rollers 30-1 and 30-2. (32) The web film and the sponge fabric are supplied to the rollers 30-1 and 30-2 by applying heat to the bonding surface of the fabric using the heating means 33 to the rollers 30-1 and 30-2 in a state in which the surface is semi-reflected. It is a process of bonding.

In the present invention, the semi-dissolved state is not a dissolved state in which a liquid slime component is produced when a direct heating means such as a flame is used, but relatively low heat is generated by indirect heating means such as a hot air fan. It is a state in which it is dissolved about half as soft as the surface is applied. In such a semi-used state, the thickness of the sponge does not decrease, and when it is bonded together with the web film, the surface of the web film is slightly melted and bonded to the surface of the sponge while maintaining its shape.

In the present invention, the sponge includes not only a general urethane sponge foam but also a filter foam, a lamination foam, a non-lamination foam, and the like.

In this case, in the present invention, when the laminate is used as the sponge, the laminate includes a component capable of generating an adhesive component such as hot-melt on the surface by relatively low temperature indirect heat such as hot air. The process of bonding a web film is abbreviate | omitted, and a 2nd process can be progressed immediately. The lamiform itself has a disadvantage that the cost is about 10% higher than the general sponge foam, but since the first process can be omitted, the production cost of the final product is not increased by simplifying the process.

In FIG. 3A, the web film 31 is supplied at the bottom and the sponge 32 is supplied at the top, but vice versa. When the sponge is supplied to the bottom, the first process and the second process may proceed as a continuous process. At this time, since the web film 31 maintains its shape, a release paper may not be disposed outside the web film 31.

Subsequently, FIG. 3B is a view illustrating a second process of laminating and bonding the bonding fabric of the web film and the sponge fabric and the leather in the laminating bonding method of leather and sponge according to an embodiment of the present invention.

As shown in FIG. 3B, the second process of the present invention comprises a pair of rollers in a state in which the bonding film of the web film and the sponge fabric obtained by the first process is disposed so that the web film 31 faces upward. 36-1 and 36-2, supplying the leather 34 to the upper portion of the bonded fabric of the web film 31 and the sponge 32, and the release film 35 to the upper portion of the leather 34. Supplying a leather 34 to the upper portion of the bonding fabric of the web film 31 and the sponge 32 fabric, the web film and sponge before the bonding fabric of the web film and sponge fabric is in contact with the cut leather Bonding the fabric The heat is applied to the upper portion of the bonding fabric by indirect heating means 37 so that the web film is supplied in a molten state by bonding the leather on the bonding fabric upper portion of the web film and sponge fabric.

The present invention is applied so that the web film is supplied in a molten state by applying heat using an indirect heating means 37 on the bonding fabric of the web film and the sponge fabric before the bonding fabric of the web film and the sponge fabric is in contact with the leather. In this case, it is preferable to use a hot air blower or an infrared ray (IR) heater as the indirect heating means. In this case, when the heat is applied by the indirect heating means, the temperature supplied to the web film is 120 to 180 ° C. It is preferable to apply heat as much as possible. This is because in such a temperature range, the web film 31 of the bonding fabric is sufficiently dissolved to serve as an adhesive and does not affect the sponge 32 and the leather 34. In the case of the infrared (IR) heater, if the temperature is too close to the web film, the temperature may rise so high that it may affect the sponge and the leather.

In the figure, the leather 34 is shown as a cut leather piece in the shape of a product, but may also include a rolled leather fabric.

That is, in the present invention, the leather may use a leather piece made of natural leather or an artificial leather in a roll state, but is not limited thereto, and is not limited thereto, such as a car seat, a car door trim, a home / office leather sofa or chair, Leather suitable for use in leather, such as chairs, bags, handbags, shoes, clothing for medical devices, can be included without limitation.

As shown in FIG. 4, after the second process, the edge of the web is cut in the form of a practical product in the bonding fabric of the web film 31 and the sponge 32 fabric and the final fabric to which the leather 34 is bonded. 39) may further comprise an automatic cutting process for cutting using.

According to the conventional method, since the leather is disposed under the sponge, the cutting work is performed by turning the fabric upside down once by inverting the bonded fabric of the web film and the sponge fabric and the final fabric where the cut leather is bonded. Work was done, which was very cumbersome and slowed down production. When the cutting operation is carried out without turning the final fabric, many products are discarded as scrap because the cutting is not made accurately.

In the present invention, since the cutting operation is continuously performed manually or automatically in a state where the leather is placed upward, the production speed can be significantly increased as compared to the existing method, and the advantage of greatly reducing the possibility of product loss due to cutting defects. There is this.

As the cutter 39 used in the present invention, a laser cutter, a cutter for cutting leather, and the like, which are generally used, may be used. The present invention is not particularly limited thereto.

According to the present invention, by using a low temperature heating crimping method performed at room temperature without using a heating furnace passing method, the quality of the leather is maintained without being impaired, and at the same time, the surface of the sponge and the leather is directly heated using a flame or the like By interposing a web film that melts at a relatively low temperature and has strong adhesion between them without heating, it is possible to use a heat compression method using a relatively low temperature such as hot air, so that the process is easy to control, and a fabric of a sponge and leather is manufactured. Since the leather is directed upward, it is easy to carry out the cutting operation continuously and the automatic cutting process is possible, which can dramatically increase the production speed and greatly reduce the quality defects.

In the above, the present invention has been described in detail with reference to the drawings, but the present invention can be variously modified and changed by those skilled in the art and such modifications and variations will be construed as belonging to the protection scope of the present invention. .

[Description of the code]

10: sponge 11: hot-melt

12: leather 13: furnace

20: sponge 21: leather (cut leather)

22: heating means 23: release film

24-1, 24-2: roller

30-1, 30-2: roller 31: web film

32: sponge 33: heating means

34: leather 35: release film

36-1, 36-2: roller 37: indirect heating means

38-1, 38-2: roller 39: cutter

Claims

A process of simultaneously supplying a web film and a sponge fabric to a pair of rollers, and bonding the web film to the roller by applying heat to the bonding surface of the sponge fabric by using a heating means. A first step of bonding the film and the sponge fabric; And

While supplying the bonding fabric of the web film and the sponge fabric obtained by the first step to the pair of rollers in a state where the web film is directed upward, the leather is supplied to the upper portion of the bonding fabric of the web film and sponge fabric Supplying a release film to the upper portion of the leather to bond the leather on top of the bonding fabric of the web film and sponge fabric, the bonding of the web film and sponge fabric before the bonding fabric of the web film and sponge fabric is in contact with the leather A second step of bonding the leather to the upper part of the bonding fabric of the web film and the sponge fabric by applying heat to the fabric using indirect heating means to supply the web film in a molten state;

Laminating bonding method of the sponge and leather fabric using a hot pressing, characterized in that comprising a.
The method according to claim 1, wherein the leather is a leather piece (piece) or roll of artificial leather made of natural leather or artificial leather, the sponge is urethane sponge, filter foam, lamination foam or non-laminated foam (non-laminated foam) -lamination foam) laminating bonding method of the sponge and leather fabric using a hot pressing.
The laminating bonding method of the sponge and the leather fabric using hot pressing according to claim 1, wherein when the lamination is used as the sponge, the second step is performed immediately without bonding the web film in the first step.
The method according to claim 1, wherein the indirect heating means is a hot air blower or infrared (IR) heater, laminating bonding method of the sponge and leather fabric using the hot pressing.
The method of claim 1, wherein the indirect heating means is applied to heat the temperature so that the temperature supplied to the web film is 120 ~ 180 ℃ laminating bonding method of the sponge and leather fabric using the hot pressing.
The method of claim 1, further comprising an automatic cutting process of cutting the edges in the form of the actual product from the bonding fabric of the web film and the sponge fabric and the final fabric to which the leather is bonded after the second process. Laminating bonding method of sponge and leather fabric using hot pressing.