KR101680457B1 - Indirect heating-type combining method of sponge and leather applied with synthetic resin elastic body combined with web film - Google Patents

Indirect heating-type combining method of sponge and leather applied with synthetic resin elastic body combined with web film Download PDF

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Publication number
KR101680457B1
KR101680457B1 KR1020150040449A KR20150040449A KR101680457B1 KR 101680457 B1 KR101680457 B1 KR 101680457B1 KR 1020150040449 A KR1020150040449 A KR 1020150040449A KR 20150040449 A KR20150040449 A KR 20150040449A KR 101680457 B1 KR101680457 B1 KR 101680457B1
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South Korea
Prior art keywords
sponge
leather
fabric
web film
joining
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KR1020150040449A
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Korean (ko)
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KR20160114264A (en
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오기창
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오기창
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B32B9/025—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch comprising leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/08—Animal particles, e.g. leather

Abstract

The present invention relates to a indirect heating type joining method of a sponge and a leather to which a synthetic rubber elastic body having a web film bonded thereto is applied. More specifically, the present invention relates to a method of joining a sponge and a leather fabric by a direct heating method using a flame lamination method, A method of joining a sponge and a leather by using an indirect heating method in which the sponge is joined to the sponge and then joined by passing through a relatively low-temperature heating chamber.
According to the present invention, in joining the leather and the sponge, the web film is bonded to the sponge without passing through the high-temperature heating method or the high-temperature flame lamination method using the hot-melt method or the like, It is possible to maintain the perfect planar state by preventing the curling phenomenon of the leather by joining the leather by using the indirect heating method which joins the leather, It is possible to produce high quality products and productivity is very high.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indirect heating type joining method of a sponge and a leather to which a synthetic resin-

The present invention relates to a indirect heating type joining method of a sponge and a leather to which a synthetic rubber elastic body having a web film bonded thereto is applied. More specifically, the present invention relates to a method of joining a sponge and a leather fabric by a direct heating method using a flame lamination method, By joining the sponge with the indirect heating method, which passes through a relatively low-temperature heating chamber, the leather is joined to prevent the curling phenomenon of the leather to maintain a perfect planar state. And a method of joining the sponge and the leather that can be maintained.

Generally, leather such as natural leather or artificial leather used for automobile seat is wrinkled due to lifting phenomenon with a seat interior material applied material or riding load due to ride load when the raw material is used as it is. Therefore, the leather used for the automobile seat is not used as it is, but a synthetic resin elastomer such as polyurethane is bonded to the lower surface of the leather.

As a method for bonding leather to synthetic resin elastomer, a method using a hot-melt adhesive and a direct lamination method using a flame or the like are widely used.

As described in Korean Patent Laid-Open No. 10-1996-0017143, the hot melt method is a method in which a hot melt adhesive is applied to a sponge, dried, and pressed together with a leather in a heating furnace. Such a hot melt method is required to be heated and pressurized for about 30 seconds under the condition of 140 to 180 ° C due to the characteristics of the hot melt adhesive. Such hot melt bonding method has a harmful working environment and uses a high temperature pressurizing condition The leather is hardened, the lubrication degree is lowered, the elasticity is lowered, and the product becomes stiff and the merchantability is greatly deteriorated.

Therefore, in recent years, the hot melt method as described above is not used well, and a direct lamination bonding method such as flame lamination is becoming popular.

In this direct lamination bonding method, a sponge is heated by melting a surface of a sponge using a heat source such as a flame, and a liquid adherent liquid generated by the heating is adhered to the back of the leather, (Japanese Utility Model No. 20-0346633, Korean Patent No. 10-1276931, Korean Patent No. 10-1270720, etc.). When the sponge is joined to the leather by such heat lamination, It is widely used in the manufacture of automobile seats because of its improved cushioning and stretchability.

However, in the above method, the sponge is supplied onto the leather, and the surface to be joined is melted by applying heat such as flame, and then supplied to the roller to be joined to the leather (see FIG. 2) Because the sponge surface must be melted by applying high temperature heat such as flame, it is difficult for the skilled person to control the process, and since the surface of the sponge is melted enough to produce mucus component, tension is generated toward the melting surface, The phenomenon (so-called bulky phenomenon) is unavoidable (see Fig. 3). In addition, since a large amount of the sponge is melted due to the high temperature, it is difficult to secure uniformity of the thickness, and the thick sponge material must be used as the initial material in consideration of the reduction in thickness. Therefore, there is a possibility of quality defect in order to be used as high quality leather for automobile even if the problem of cost increase is separately. In order to solve such a problem, conventional horizontal lamination equipment and method have been suggested, It is a technology that is not easy to apply.

The present invention has been developed in consideration of the circumstances of the prior art as described above, and it is an object of the present invention to provide a method for bonding a leather and a sponge without using a high temperature heating method or hot flame laminating method using a hot- By joining the sponge with the indirect heating method, which passes through a relatively low-temperature heating chamber, the leather is joined to prevent the curling phenomenon of the leather to maintain a perfect planar state. The present invention provides a bonding technique of sponge and leather having high productivity and workability because it is possible to produce a high quality product even if it is not an experienced worker because it is easy to maintain and control the process.

In order to achieve the above object,

A first step of joining a web film and a sponge fabric to a roller by simultaneously supplying a web film and a sponge fabric to a roller;

A second step of cutting the joining fabric of the web film and the sponge fabric obtained by the first step into a piece of leather fabric piece, in the same manner as that of the leather fabric piece or in a shape having a smaller rim than the leather fabric piece;

A third step of laminating the web film and the sponge fabric obtained in the second step so as to be located at the center of the leather fabric piece, with the web film facing in the leather direction; And

And a fourth step of putting the laminate of the joining material piece and the leather raw material piece of the web film and the sponge fabric into a heating chamber maintained at an internal temperature of 90 to 140 ° C by using a conveyor and passing the mixture through a roller And a method of joining a sponge and a leather fabric piece.

In a preferred embodiment according to the present invention, the heating means is an indirect heating means.

In a preferred embodiment according to the present invention, the indirect heating means is an infrared heater.

In a preferred embodiment of the present invention, the heating means applies heat so that the temperature of the web film is 90 to 140 ° C.

In addition, in a preferred embodiment of the present invention, the sponge is a synthetic resin-based elastic body including a PE foam and a PVC foam which can be joined to a leather material in addition to a general urethane sponge foam or a filter foam.

Further, in a preferred embodiment of the present invention, the joining material of the web film and the sponge fabric obtained by the first process is used in a roll state without being cut into leather pieces in the second process, And then the fourth step is carried out to join the leather piece to the joining fabric of the rolled web film and the sponge fabric, followed by cutting.

The features and advantages of the indirect heating joining method of the sponge and the leather to which the synthetic resin-based elastic body bonded with the web film according to the present invention is applied are as follows.

1. In the method of applying hot-melt and joining in a heating furnace in bonding leather and sponge, there are problems in that inherent characteristics of leather are damaged at high temperature and quality is deteriorated and harmful gas is generated in hot- In the direct heating type joining method such as conventional flame lamination, when tension is applied in the direction of the heating surface of the sponge, when the leather is joined, it is difficult to obtain a high quality leather product due to the occurrence of curling It does not cause damage to the leather quality and does not use the direct heating method. Therefore, the curling does not occur and it is possible to manufacture a completely flat product.

2. In addition, since the direct heating type joining method such as conventional flame lamination melts one side of the sponge at a high temperature, the thickness of the sponge is largely lost and a homogeneous product can not be manufactured. Therefore, The thickness of the sponge used in the present invention is reduced. Therefore, the thickness of the sponge used for the first time can be reduced and the cost can be reduced.

3. Also, since the heating chamber of relatively low temperature is passed through the conveyor without using the high temperature direct heating method by the flame, the leather and the sponge are bonded together, so that the process control is easy, It can be manufactured semi-automatically, so it is very fast in production speed and easy to work.

1 is a view showing bonding of a leather and a sponge by a hot-melt heat bonding method according to a conventional method.
2 is a view showing bonding of leather and sponge by the flame direct lamination method according to the conventional method.
3 is a photograph of an actual product showing that curling has occurred in a bonded product of leather and sponge manufactured by the conventional flame direct lamination method as shown in FIG.
FIG. 4 is a schematic view illustrating a method of indirectly heating a sponge and a leather according to an embodiment of the present invention, in which a sponge fabric and a web film are laminated and then cut, Fig.
FIG. 5 is a view showing a fourth step of joining a sponge and a leather through an indirect heating chamber in a indirect heating type joining method of a sponge and a leather according to an embodiment of the present invention. FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a view showing bonding of a leather and a sponge by a hot-melt heat bonding method according to a conventional method.

1, the conventional hot-melt heat bonding method comprises applying a hot-melt 101 on a sponge 100 by means of a heat-joining method and applying a leather (e.g., leather piece) 102 Is passed through the heating furnace 103 in the state of being laminated. In this case, the leather is cured at a high temperature in the heating furnace, the stretchability is lowered, and the product becomes stiff, resulting in poor merchantability. Further, there is a problem that the hot-melt dissolves in a high-temperature condition, and noxious gas is emitted to contaminate the environment.

2 is a view showing bonding of leather and sponge by the flame direct lamination method according to the conventional method.

The conventional method shown in FIG. 2 is a method of joining the sponge 120 at room temperature by pressing the sponge 120 by passing the rollers along with the back surface of the leather 121 in a melted state by heating. 120 is melted to form a mucus, and in this state, it is bonded to the leather placed on the lower release film 123. In this method, heating means is disposed near the sponge 120, preferably at the bottom of the sponge, using heat transferred from the flame to the upper direction, and a pair of rollers 124-1, 124 -2) to join the sponge and the leather. As described above, in the conventional method, since the surface of the sponge is sufficiently melted to form a liquid adhesive solution, the heating temperature of the heating means must be very high. Therefore, a direct heating method such as a flame is usually used. Lt; / RTI >

Therefore, in the conventional method, since the tension is concentrated on the melting surface of the sponge, there is a problem that curling occurs in the leather direction when the leather is joined, and the thickness of the sponge is greatly reduced, There is a limit in that it is difficult to produce a product of excellent quality.

3 is a photograph of an actual product showing that curling has occurred in a bonded product of leather and sponge manufactured by the conventional flame direct lamination method as shown in FIG.

As shown in FIG. 3, when curling (a so-called bulky phenomenon) occurs in the leather direction, there is a problem that it is difficult to apply to curved surfaces or folded surfaces required for application characteristics of the leather sheet due to warping in one direction.

The present invention is a technique for solving such curling phenomenon and for producing a perfectly flat leather and sponge bonded product.

FIG. 4 is a schematic view illustrating a method of indirectly heating a sponge and a leather using a synthetic resin-based elastic body to which a web film is bonded according to an embodiment of the present invention. The sponge fabric and the web film are laminated and laminated, 1 is a diagram showing the first to third steps in order. 5 is a view showing a fourth step of indirect heating joining of a sponge and a leather to which a synthetic resin-based elastic body having a web film bonded thereto according to an embodiment of the present invention is bonded by passing through an indirect heating chamber.

4 and 5, a method of joining a sponge and a leather material piece according to the present invention comprises four steps of a first step to a fourth step. In the first step, a web film is bonded to a sponge, And the second step is a step of cutting the joining fabric of the obtained sponge and the web film into a piece of leather raw piece, and the third step is a step of joining the obtained web film and the sponge fabric A step of laminating the fabric piece and the leather fabric piece, and the fourth step is a step of putting the laminated laminate into a heating chamber by using a conveyor and joining the laminate by a roller.

First, in the first step, the web film 202 and the sponge fabric 203 are simultaneously fed to the roller 201 to join them. Preferably, the web film and the sponge fabric are unwound from a roll, And applying heat to the joining surface of the sponge fabric 203 by heating using a heating means 204 to supply the web 201 and the sponge fabric to the roller 201 while heating the surface thereof .

In this case, a method of bonding the web film and the sponge fabric may be a bonding or a laminating method. In particular, in the present invention, the surface is heated by applying heat using the heating means 204 , It means a state in which the surface is softened by relatively low heat applied by an indirect heating means such as an infrared heater, rather than dissolving to such an extent that a liquid mucus component is produced when a direct heating means such as a flame is used do. In the present invention, it is preferable that the heating means applies heat so that the temperature to be supplied to the web film is 90 to 140 ° C. At a temperature lower than the above temperature, the one surface of the sponge is not softened so that the web film is difficult to be bonded. At a temperature higher than the above temperature, the web film is dissolved and adhered to the roller, To be supplied.

When the surface is softened and 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.

Then, the obtained web film and the joining fabric 205 of the sponge fabric are cut in the form of a leather fabric piece. At this time, the rim of the joining fabric 205 of the web film and the sponge fabric may be the same as the leather fabric piece 206, or may be formed in a shape smaller than the leather fabric so as to be easily sewn on the automobile sheet, Cut it into a shape as small as 0.2 ~ 1.0cm.

Then, the web film and the sponge fabric 205 are joined to each other at the center of the leather fabric piece 206. At this time, the web film is laminated so as to be in the leather direction. In FIG. 4, the leather fabric piece is laminated on the lower side and the joining fabric of the web film and the sponge fabric is laminated on the upper side, but they may be stacked on the opposite side.

Subsequently, the laminate of the joining material 205 and the leather material piece 206 of the web film and the sponge fabric is put into the heating chamber 301 by using the conveyor 300 and joined together by indirect heat. The heating chamber 301 has, for example, upper and lower indirect heat generating means 302 therein. Due to the heat generated by the indirect heat generating means, the temperature inside the heating chamber is 90 ° C to 140 ° C, Lt; RTI ID = 0.0 > 125 C < / RTI > When the web film melts in the heating chamber 301 due to such temperature and is pressed once by the roller 303 provided at the outlet side of the heating chamber, the sponge fabric and the leather fabric piece are completely joined.

In the present invention, the leather includes all leather which is generally used as an automobile sheet, such as natural leather, artificial leather, or leather (natural leather, artificial leather) having a ventilation hole.

In addition, the sponge of the present invention includes a general urethane sponge foam or a filter foam, and includes a synthetic resin-based elastic material such as a PE foam or a PVC foam capable of bonding with a leather material in addition to a sponge.

In the present invention, the joining of the joined web of the web film and the sponge fabric joined in the first step is cut in the form of a leather fabric piece, laminated with the leather fabric piece, and then passed through the heating chamber of the fourth process, The joining material of the web film and the sponge fabric obtained by the first process is used in a rolled state without being cut in the form of a leather piece in the second process so that the leather fabric pieces are laminated, The process may be followed by joining the leather piece to the joined web of rolled web film and sponge fabric, followed by cutting in the form of a piece of leather.

According to the present invention, in joining the leather and the sponge, the web film is bonded to the sponge without passing through the high-temperature heating method or the high-temperature flame lamination method using the hot-melt method or the like, It is possible to maintain the perfect planar state by preventing the curling phenomenon of the leather by joining the leather by using the indirect heating method which joins the leather, It is possible to produce high quality products and productivity is very high.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, .

100: Sponge 101: Hot-melt
102: leather 103: heating furnace
120: Sponge 121: Leather
122: Heating means 123: Release film
124-1, 124-2: Rollers
201: roller 202: web film
203: sponge fabric 204: heating means
205: Fabric joining web film and sponge fabric
206: Leather fabric piece
300: Conveyor 301: Heating chamber
302: indirect heat generating means 303: roller

Claims (6)

A step of applying a web film and a sponge fabric to the rollers at the same time, heating the web film to a temperature of 90 to 140 ° C by using an infrared heater on the bonding surface of the sponge fabric so that a sponge fabric A first step of joining together the web film and the sponge fabric so that the surface is softened while maintaining the shape;
A second step of cutting the joined fabric of the web film and the sponge fabric obtained by the first step in the form of a leather fabric piece, the fabric being cut into a shape smaller than the leather fabric piece by 0.2 to 1.0 cm;
A third step of laminating the web film and the sponge fabric obtained in the second step so as to be located at the center of the leather fabric piece, with the web film facing in the leather direction; And
A fourth step of putting the laminate of the joining material piece and the leather material piece of the web film and the sponge fabric into a heating chamber maintained at an internal temperature of 90 to 140 ° C by using a conveyor and passing the mixture through rollers located in the heating chamber ;
Wherein the sponge and the leather fabric piece are joined together.
delete delete delete The method according to claim 1, wherein the sponge is a synthetic resin-based elastic body including a PE foam or a PVC foam capable of bonding with a leather material in addition to a general urethane sponge foam or a filter foam. .
delete
KR1020150040449A 2015-03-24 2015-03-24 Indirect heating-type combining method of sponge and leather applied with synthetic resin elastic body combined with web film KR101680457B1 (en)

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Cited By (2)

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KR101898548B1 (en) 2018-07-12 2018-09-13 주식회사 태광앤코리아 Apparatus for forming patterns into lathers with cushion materials and the pattern lathers using the same
KR101898550B1 (en) 2018-07-12 2018-09-13 주식회사 태광앤코리아 Apparatus and method for bonding between cushion materials and leathers using steam

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KR102575154B1 (en) * 2018-09-07 2023-09-06 현대자동차주식회사 Carbon fiber fabric having improved surface property and impact resistance and method for manufacturing the same
CN111775453A (en) * 2020-06-01 2020-10-16 苏州杜伦复合新材料有限公司 Production process of composite sponge and adhesive film
KR102261261B1 (en) * 2020-06-30 2021-06-08 (주)세계화성 Multi-complex joining method of leather and sponge and leather seat cover with multi-complex manufactured by the method for reducing wrinkle generation

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Publication number Priority date Publication date Assignee Title
KR101898548B1 (en) 2018-07-12 2018-09-13 주식회사 태광앤코리아 Apparatus for forming patterns into lathers with cushion materials and the pattern lathers using the same
KR101898550B1 (en) 2018-07-12 2018-09-13 주식회사 태광앤코리아 Apparatus and method for bonding between cushion materials and leathers using steam

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