KR101942956B1 - Unload torque laminating method for leather seats - Google Patents

Abstract

The present invention provides a no-load laminating method and a leather seat using the same, to manufacture a car seat, a seat for a chair or furniture and a chair for clothing by laminating leather wound in a roll type or leather cut in a predetermined shape according to a pattern on a foam member cut in a predetermined design by a roll or a pattern weak to a load like tension, compression or bending wherein the leather is bonded to one surface of the foam member by using self-weight of the leather. The present invention solves a problem caused by the load applied to the foam member to enhance smoothness of a product, marketability of the leather and productivity through continuous work processes. The laminating method comprises: a foam processing step of adjusting density and thickness of the foam member; a foam member supply step of supplying, onto a conveying belt, the foam member wound in a roll type or cut in a predetermined shape by a pattern in the foam processing step; a step of performing a fluid add-on or covering operation of an adhesive on one surface of the foam member in order to form an adhesive layer with regular thickness; a temporary adhesion step of laminating or combining leather with regular weight onto the adhesive layer formed in the adhesive layer forming step to temporarily bond the leather laminated or combined with the adhesive layer by the self-weight of the leather; a main adhesion step of bonding the leather by melting or curing the adhesive layer while passing a chamber with a predetermined temperature after the temporary adhesion step; and a cooling step of cooling a seat softened by being heated after the main adhesion step.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a laminating method,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of laminating no-load and a leather sheet using the same, and more particularly, to a leather sheet which is rolled up in a rolled form to a foam member cut in a predetermined shape by a roll or pattern vulnerable to tensile, A chair for a car seat, a chair or a furniture seat is manufactured by stacking leather cut into a certain shape by a pattern and attaching it to one surface of the foam member by using the weight of the leather, The present invention relates to an advantageous no-load laminating method and a leather sheet using the same, which improves the smoothness of a product and improves the merchantability of the leather while improving the productivity through continuous work.

In general, laminating refers to laminating the same kind or different kind of paper, film, or fabric using adhesive resin or heat, and there are two methods of bonding sponge to the back of natural leather.

First, the hot melt is applied to a sponge by a hot melt method as disclosed in Japanese Patent Application Laid-Open No. 1996-0017143, dried and bonded together with cut natural leather in a heating furnace.

In the hot melt method, due to the characteristics of the hot melt adhesive, it is necessary to pressurize for 20-30 seconds at a temperature of 140-180 DEG C, and since the natural leather is hardened by the high temperature pressing condition, But only to a limited extent. In addition, there is a disadvantage that the productivity is lowered and the cost is increased due to complicated processes such as application of hot melt adhesive and heating and pressing.

The second is that when the surface of the sponge is melted with the gas flame by the flame laminating method as in the registered trademark application No. 0346633, the liquid adheres to the surface, and when a pair of rollers is pressed on the back of the fabric or artificial leather, the sponge is adhered. In order to improve the yield of the raw material, the leather company should cut each shape and then perform the laminating process to bond with the sponge.

However, there is no method for selectively attaching only natural leather cut to a sponge in a roll state, and if the one side of the sponge is melted, a sponge melted in the leather-free portion adheres to the roller,

Therefore, in the past, when sponge cut in the same shape as natural leather is overlapped and only the edges are sewn, the leather and sponge are separated from each other due to the difference in the recovery ratio, and quality problems such as wrinkles and skin flaking occur.

Furthermore, in the case of using natural leather for ventilation sheets, the sponge blocks the ventilation holes formed in the natural leather for the ventilation sheet as described above, thus significantly deteriorating the function of the ventilation sheet.

In order to solve such a problem, Korean Patent Registration No. 1315316 has been proposed. The above-mentioned Korean Patent No. 1315316 discloses a natural leather laminating method for a ventilating sheet and a natural leather ventilating sheet using the same, which comprises a filter foam 1 continuously fed in a roll state as shown in FIG. 1, A release sheet 7 arranged on the table 6 in a longitudinal direction on the table 6 and a natural leather 2 for a ventilation sheet formed in a matrix form in which a plurality of ventilation holes are formed in rows and rows in advance, (3) for melting the one side surface of the filter foam (1) to give tackiness, and first and second rollers (3, 4) for intermeshing rotation to adhere the filter foam (1) 4) (5).

On the upper side of the table 6, there are provided a plurality of pairs of the natural leather 2 for the ventilating sheets, which are set in advance by setting the release rolls so that the release liner 7 is long in the longitudinal direction and spaced on the release liner 7, A plurality of sheets of natural leather 2 for a ventilation sheet are automatically transported by being separated from the release paper 7 by the rotation of the rollers in a state in which one end is fitted in the first and second rollers 4 and 5 of the first and second rollers 4 and 5 .

The above-mentioned Korean Patent No. 1315316 discloses a natural leather laminating method for a ventilation sheet and a natural leather ventilation sheet using the same. In addition, there is a problem that the open cell structure is broken by heating the surface of the filter foam, Is fed through a plurality of feed rollers and is supplied in a state in which a load such as tension and bending is applied. As a result, the filter foam or the leather is deformed upon cooling after the filter foam is attached so that the length of one side is formed to be long or short, .

Korea Shinan Practical Registration No. 0346633 Korean Patent Publication No. 1996-0017143 Korean Patent No. 1315316

The present invention has been made in view of such conventional problems, and it is an object of the present invention to provide a method of cutting a predetermined shape by a leather or a pattern wound in a roll form on a foam member cut in a certain shape by a roll or pattern vulnerable to tension, compression, And the leather is attached to one surface of the foam member by using the weight of the leather so as to manufacture an automobile or a furniture sheet, thereby solving the problems caused by the air permeability and the load applied to the foam member, To provide a method of laminating no-load leather sheet having advantages such as improved productivity and productivity through continuous work, and a leather sheet using the same.

It is an object of the present invention to provide a method for laminating a leather sheet, comprising: a foam processing step of adjusting the density and thickness of a foam member; A foam member feeding step of feeding a foam member wound on a conveying belt in a roll form by the foam forming step or cut in a predetermined shape by a pattern; Forming a bonding layer having a predetermined thickness by applying a fluid add-on or adhesive to one surface of the foam member; And an adhesion step of laminating or laminating a leather having a predetermined weight on the adhesive layer formed by performing the step of forming the adhesive layer, and adhering the leather by self weight of the leather; An adhesive bonding step of bonding the leather by melting or curing the adhesive layer while passing the chamber having a constant temperature after the bonding step; And a cooling step of cooling the softened sheet by receiving heat after the main bonding step.

And the temperature of the chamber is 20 to 40 ° C.

Wherein the adhesive has a viscosity of 1,000 to 20,000 cP and a coating thickness of 10 to 100 mu m.

Wherein the main bonding step comprises supplying air having a moisture content in the range of 50 to 90% to the chamber, absorbing the moisture, and reacting the absorbed moisture with the adhesive to adhere the leather to the leather sheet. .

The leather sheet is characterized in that it is produced by the above production method.

According to the present invention, a leather or a pattern cut into a predetermined shape by a roll or a pattern wound on a foam member cut in a predetermined shape by a roll or a pattern vulnerable to a load such as tension, compression, By attaching to the surface of the foam member by using the weight of the leather, it is possible to manufacture automobile or furniture sheet and clothes, thereby solving the problem caused by the air permeability and load applied to the foam member, thereby improving the smoothness of the product and improving the merchantability of the leather And it is advantageous and useful invention such as improvement of productivity through continuous work at the same time.

1 is a manufacturing process diagram showing a no-load laminating method to which the technique of the present invention is applied.
Fig. 2 is a manufacturing process diagram showing the manufacturing method of another embodiment in the no-load laminating method of the present invention. Fig.
Figs. 3 to 4 are views showing a manufacturing process showing a manufacturing method of another embodiment in the no-load laminating method of the present invention. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a manufacturing process diagram showing a no-load laminating method to which the technique of the present invention is applied. A foam member supplying step (S200) of supplying a foam member (10) wound on a roll form by the foam forming step (S100) or cut into a predetermined shape by a pattern onto a conveying belt (20); An adhesive applying step (S300) of forming an adhesive layer (30) having a predetermined thickness by applying an adhesive to one surface of the foam member (10); And a step of applying an adhesive (S300) for forming the adhesive layer (30), the leather (40) having a predetermined weight is laminated or formed on the adhesive layer (30) Adhering step S400; (S500) of bonding the leather by melting or curing the adhesive layer (30) while passing through the chamber (50) having a constant temperature after the adhesion step (S400); And a cooling step (S600) for cooling the softened sheet by receiving heat after the main adhesion step (S500).

In more detail, the foam member supply step (S200) may be performed in order to prevent the foam member (10) from being cut to a predetermined shape by a roll state or a pattern, A conveyor must be installed which can be fitted with a winder and which supplies a section of lengthwise length. During the subsequent bonding step, lapping step, and curing step, including the foam feeding step, the moving speed of the product is kept constant.

The foam member 10 is made of a material such as polyester or polyether having excellent adhesiveness, durability and air permeability, foamed by reaction with diisocyanate or the like, or polyether polyol or polyether polyol and polymer polyol Is foamed together with an isocyanate to form a network having an open cell structure.

The foam member 10 having the above-described structure is wound in a roll form by the foaming step S100 by performing a foaming step S100 for adjusting the density and thickness through a block foaming or a sheet foaming operation, A foam member feeding step (S200) is performed in which the foam member 10 cut in a predetermined shape by a pattern is placed on the conveying belt 20 so as to be movable.

At this time, if the foam member 10 is pulled by being conveyed by the frictional force between the foam member 10 and the conveyance belt 20, deformation occurs after completion of the product, so that any physical force is applied to the foam member 10 to move Not even.

It is preferable that the conveying belt 20 is made of a synthetic resin material having excellent heat resistance, while the foam member 10 is placed on the conveying belt 20 and conveyed. This is because the surface should not be deformed or sagged when passing through the chamber 50.

An adhesive applying step (S300) of forming an adhesive layer (30) having a predetermined thickness by applying an adhesive to one side of the foam member (10) in a traveling direction by transporting the foam member (10) .

The adhesive preferably has a viscosity of 1,000 to 20,000 cP and a coating thickness of 10 to 100 μm. The reason for this is that if the viscosity of the adhesive is 1,000 cP or less, it is difficult to apply an accurate amount of the adhesive resin in the process of applying the adhesive resin to one side of the foam member in terms of mechanical property, and there is a high possibility that the adhesive is leaked into the foam member . If the viscosity of the adhesive is 20,000 cP or more, similarly, it is difficult to apply the correct amount of application in the process of applying the adhesive resin to one side of the foam member, and since the foam member is separated from the conveyance belt and adhered to the adhesive roller due to viscosity of the adhesive, to be. If the coating thickness of the adhesive is less than 10 mu m, it is difficult to obtain an adhesive force. If the coating thickness of the adhesive is 100 mu m or more, the curing speed becomes too long or the softness of the finished product may be adversely affected.

The adhesive layer 30 may be formed by a method in which when the foam member 10 passes between the support roller 70 and the coating roller 80 spaced apart from each other by silicon or synthetic resin at a predetermined interval, An adhesive is supplied between the coating roller 80 and the knife roller 90 installed horizontally and an adhesive is applied to the surface of the coating roller 80 by a spaced distance between the coating roller 80 and the knife roller 90, The adhesive agent on the surface of the roller 80 is applied to the surface of the foam member 10 passing between the support roller 70 and the coating roller 80 and coated thereon.

Although the present invention has been described for the sake of convenience of explanation, it is not limited to the knife roller 90, and those skilled in the art will understand that a structure capable of supplying an adhesive within a range not changing the gist of the present invention It is possible to use variously to change.

On the other hand, a thermoplastic adhesive, a thermosetting adhesive, a moisture-curing adhesive and the like can be used as the adhesive. Urethane and acrylic adhesives can be used as thermosetting adhesives, hot melts and the like as thermoplastic adhesives, and PUR as a moisture curing adhesive.

When the adhesive agent is applied to the surface of the foam member 10 as described above, the adhesive agent is exposed to the air during the conveyance of the foam member 10 by the conveyance belt 20, so that curing takes place in a constant state, (Step S400), and then the leather is cut into a predetermined shape by laminating the leather or the pattern cut to a predetermined shape by the pattern.

In the adhesion state, the adhesive is cured in a fixed form, but the adhesion is performed due to the weight of the leather 40 (40a) placed on the upper part. At this time, the adhesion is carried out by the foam member (10) The leather 40 or 40a may be made of any one of natural leather and artificial leather. The leather 40 may be formed of a plurality of through holes formed at regular intervals in the leather. It is possible.

On the other hand, the supply form of the leather may be a roll-wound leather as shown in FIG. 1, or a leather cut to a certain size by a pattern as shown in FIG. 2 of the accompanying drawings.

The laminate passes through the chamber 50 in the state where the lamination is completed in the order of the foam member 10, the adhesive layer 30, and the leather 40, 40a. 1 and 2, the chamber 50 is heated to a temperature of 20 to 40 DEG C to completely cure the adhesive layer 30 to form a chamber (not shown) for adhering the leather 40 and 40a 50) may be used (see this adhesion step S500).

3, the water supply device 60 is connected to the chamber 50a so as to form a temperature in the range of 20 to 40 DEG C and a humidity of 50 to 90% Can be used.

The reason why the air contains moisture is that the leather 40 absorbs the moisture of the humidity and the leather 40 is adhered to the leather 40 by reacting with moisture absorbed by the type of the adhesive 40. Further, This is because the leather 40 can be prevented from being deformed by the temperature.

FIG. 4 is a manufacturing process diagram showing a manufacturing method of another embodiment of the no-load laminating method of the present invention. As shown in FIG. 2, leather cut to a certain size can be used, The foam member 10a cut to a predetermined size or shape for the foam member 10 may be used.

The present invention as described above is characterized in that a leather 40 wound in a roll shape or a leather 40a cut in a predetermined shape is laminated on a foam member 10 having an open cell structure, And is attached to one surface of the foam member 10 to manufacture an automobile or furniture sheet, thereby improving the ventability and the merchantability of the leather, and improving the productivity through continuous work.

10, 10a: Foam member 20: Feed belt
30: adhesive layer 40, 40a: leather
50, 50a: chamber 60: water supply device
70: Support roller 80: Coating roller
90: Knife roller S100: Foaming step
S200: Foam member supply step S300: Adhesive application step
S400: adhesion step S500: adhesion step

Claims (5)

In the laminating method,
A foam processing step of adjusting the density and thickness of the foam member; A foam member feeding step of feeding a foam member wound on a conveying belt in a roll form by the foam forming step or cut in a predetermined shape by a pattern; An adhesive layer forming step of forming an adhesive layer having a constant thickness by applying a fluid add-on or adhesive to one surface of the foam member; And an adhesion step of laminating or laminating a leather having a predetermined weight on the adhesive layer formed by performing the adhesive layer forming step and attaching the leather by self weight of the leather; An adhesive bonding step of bonding the leather by melting or curing the adhesive layer while passing the chamber having a constant temperature after the bonding step; And a cooling step of cooling the softened sheet by receiving heat after the main bonding step,
A temperature in the range of 20 to 40 DEG C is formed in the chamber and a moisture supply device is connected to the chamber to form air having a humidity of 50 to 90% so that the leather adsorbs moisture of the humidity and reacts with the adsorbed moisture Characterized in that the leather is bonded and the deformation of the leather is prevented by the temperature. delete The method according to claim 1,
Wherein the adhesive has a viscosity of 1,000 to 20,000 cP and a coating thickness of 10 to 100 mu m. delete A leather sheet characterized by being produced by the method of any one of claims 1 to 3.

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