JP2002001213A - Method for applying hot melt adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain desired adhesion-fixing by using a small amount of an adhesive in order to solve problems of health detriment caused by chemical substances which are used as the adhesive for building materials and used in clothes and to reduce production material costs. SOLUTION: An adhesive particles suspending atmosphere in which innumerable hot melt adhesive particles are suspending is formed, the application surface of an application base material being transferred in an application line is made to face the lower surface of the atmosphere, and the innumerable hot melt adhesive particles are stuck to the application surface of the base material. In the application line in which the hot melt adhesive is applied on the application surface between layers of a humor absorbent, the atmosphere is formed above the application surface of the base material being transferred in the application line to face the application surface, and the innumerable hot melt adhesive particles are stuck to the application surface of a layer constituting the humor absorbent which is the application base material to attain adhesion- fixing by innumerable point-like adhesive points in place of the meshes of hot melt adhesive filaments.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a hot-melt adhesive to an application surface of an application substrate being transferred on an application line. In the production of a liquid absorbent core layer, a liquid-permeable thin layer and a liquid-impermeable backsheet, and further, if necessary, a bodily fluid absorber (for example, a disposable diaper, a napkin) having an additional thin layer between the layers. The present invention also relates to a method for applying a hot-melt adhesive in an application line for applying a hot-melt adhesive to an application surface between respective layers of the body fluid absorber as an application substrate.

[0002]

2. Description of the Related Art A coating surface of a coating substrate having a large area (for example,
In applying the hot melt adhesive to the application surface of the decorative sheet for building materials, a direct application by a coater application device or a spiral spray application method is applied. Japanese Patent Publication No. 2510495 "Disposable Waste Storage Garment" has a liquid absorbing core layer, a liquid-permeable thin layer and a liquid-impermeable backsheet, and, if necessary, an additional thin layer between the layers. In manufacturing a body fluid absorber, it is disclosed that the respective layers of the body fluid absorber, which is a coating substrate, are bonded and fixed with a mesh network of filaments of a hot melt adhesive.

[0003]

Heretofore, in order to meet the demand for more secure bonding and fixing, a strong bonding and fixing has been made using an excessive amount of adhesive. In recent years, at the time of occupancy of a new building, there have been problems of health impairment due to chemical substances used in building materials and health impairment caused by chemical substances used in clothes and underwear. Further, in order to reduce the manufacturing cost, it is desired to achieve a desired adhesive fixation with a smaller amount of adhesive. Therefore, the present invention
An object of the present invention is to reduce the amount of hot-melt adhesive to be used and to achieve the desired purpose of adhesive-fixing by bonding and fixing a smaller amount of the filament compared to the mesh network of filaments of the hot-melt adhesive. .

[0004]

According to a first aspect of the present invention, there is provided an adhesive particle floating atmosphere in which a granular hot melt adhesive is innumerably floated, and the coating is performed on a lower surface of the adhesive particle floating atmosphere while transferring a coating line. A hot melt adhesive application method is provided, wherein the application surfaces of a substrate are opposed to each other, and countless granular hot melt adhesives are attached to the application surface of the application substrate.

[0005] The second invention of the present application is a coating line for applying a hot-melt adhesive to a coating surface between each layer of a bodily fluid absorber. It is formed so as to face above the application surface of the application substrate during transfer, and countless granular hot melt adhesives are attached to the application surface of the layer constituting the body fluid absorber which is the application substrate, and the hot melt adhesive Provided is a hot melt adhesive applying method, characterized in that the filaments are fixed by an infinite number of point-like bonding points in place of a mesh network of filaments.

According to a third aspect of the present invention, there is provided a hot-melt adhesive applying method for applying a hot-melt adhesive above an application surface of an application substrate being transferred in an application line, wherein a brush body having hard bristles is rotationally driven. Then, the cylindrical surface of the brush body is positioned at the opening of the hot melt adhesive supply hole, the hot melt adhesive is applied to the tip of the hard bristles of the brush body, and the hot melt adhesive is applied. Vibration is caused at the tip of the hard bristles of the above, the hot melt adhesive applied to the tip of the hard bristles of the cylindrical brush body is separated from the hard bristles of the brush body, and the coating substrate is applied during the transfer of the application line. An adhesive granule floating atmosphere in which the granular hot melt adhesive floats innumerably above the surface, and the granular hot melt adhesive floats the adhesive granule floating atmosphere on the application surface of the application substrate during the transfer of the application line Can be attached A method of applying a hot melt adhesive in a coating line, characterized in that a granular hot melt adhesive is attached to an application surface of an application base material in an infinite number of points and adhered and fixed in innumerable points of adhesion points. provide.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A space is provided above a coating surface of a coating substrate (a layer constituting a bodily fluid absorber) which is being transferred on a coating line, and a cylindrical brush body having hard bristles planted thereon is surrounded by a peripheral surface. A part of the hot melt adhesive is supplied to the opening of the hot melt adhesive supply hole. Is applied. By bringing the protruding piece into contact with the peripheral surface of the rotating cylindrical brush body, that is, the tip of the hard bristles, vibration is applied to the tips of the hard bristles of the cylindrical brush body coated with hot melt adhesive at the tips of the hard bristles. Cause. As a result, the hot melt adhesive applied to the tip of the hard bristles of the cylindrical brush body is separated from the hard bristles of the brush body, and the granular hot melt adhesive is floated in the space below the cylindrical brush body and adhered. Form an atmosphere in which the particles are suspended. The lower surface of the adhesive particle floating atmosphere is
Since the coating surface of the coating substrate (the layer constituting the body fluid absorber) is applied, the granular hot melt adhesive that has floated down the adhesive particle floating atmosphere and has dropped downward adheres to the coating surface of the coating substrate. As a result, the granular hot melt adhesive is attached to the application surface of the application substrate in countless points. Each layer of the bodily fluid absorber, for example,
The liquid-absorbing core layer and the liquid-impermeable backsheet are adhered and fixed at countless points.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on embodiments of the present invention shown in the drawings. FIG. 1 shows a case where the first invention of the present application is applied in applying a hot-melt adhesive to a surface to which a decorative sheet for building material is applied in manufacturing a building material, and the back surface 1a of the decorative sheet for building material 1 which is an applied base material is innumerable. Is applied to form the hot melt adhesive applied surface B1.

FIG. 2 shows the means for forming the granular hot-melt adhesive application surface B1 of FIG. 1. The adhesive hot-grain floating in which the granular hot-melt adhesive innumerably floats above the application line 2 during the building material manufacturing process. An atmosphere A is formed.

The decorative sheet for building material 1 supplied from the supply roll 3 of the decorative sheet for building material 1 moves on the upper surface of the coating line 2 while the sheet back surface 1a faces the lower surface of the adhesive particle floating atmosphere A. proceed. A myriad of granular hot-melt adhesives are adhered to the application surface (sheet back surface 1a) of the application base material to form a granular hot-melt adhesive application surface B1. Thereafter, the decorative sheet for building material 1 is sent to the building material transport line 5 with the granular hot melt adhesive applied surface B1 facing the upper surface of the building material 4 of the building material transport line 5.

In the building material transport line 5, the pressing device 6 affixes the granular hot melt adhesive application surface B1 of the building material decorative sheet 1 of the building material 4 being transferred on the upper surface of the building material transport line 5 to complete the decorative building material. .

FIG. 3 shows a liquid absorbent core layer 11 and a liquid-permeable thin layer constituting the body fluid absorber 10 when the body fluid absorber 10 is manufactured.
12 and the liquid-impermeable back sheet 13 and, if necessary, additional thin layers (tissue layers) 14 and 15 between the above-mentioned layers. Innumerable granular hot-melt adhesives P are attached to the adhesive-applied surfaces between the respective layers to be adhered to form the granular hot-melt-adhesive-applied surface B2.

FIG. 4 shows a means for forming the granular hot-melt adhesive application surface B2 of FIG.
Are formed so as to face the application surface 10a of the application substrate being transferred, and a myriad of granular hot-melt adhesives P are attached to the application surface 10a of the layer constituting the bodily fluid absorber 10, and the granular hot-melt adhesive is applied. This forms the application surface B2. In FIG. 4, the tissue 1 supplied from the tissue supply roll 17 is shown.
4 and the liquid-absorbing core layer 11 are bonded and fixed at an infinite number of point-like bonding points by the pressing roll 18 via the granular hot-melt adhesive application surface B2. .

FIGS. 5 and 6 show the adhesive particle floating atmosphere A.
A first embodiment of the forming means is shown, and a space is provided above the coating surface 10a of the coating base material being transferred through the coating line 16, and the hard bristle is formed.
The brush body 20A with the implanted 21 is driven to rotate, the peripheral surface of the brush body 20a is positioned at the opening of the supply hole 22 for the hot melt adhesive, and the hot melt adhesive is applied to the tip of the hard bristles 21 of the brush body. Vibration is generated at the tip of the hard bristles 21 of the tubular brush body 20a that has been applied and applied with the hot melt adhesive. Prong 23
Is fixed to the lower end of the support 24, and the projecting piece 23 and the cylindrical brush body 20 are fixed.
The hard hair 21 is vibrated by contact with the tip of the hard hair 21 of a. The hot melt adhesive applied to the tip of the hard bristles of the cylindrical brush body is separated from the cylindrical brush body 20a by the vibration of the hard bristles 21 of the brush body, and the coating line is applied to the coating surface of the coating base material being transferred. An adhesive particle floating atmosphere A in which the granular hot melt adhesive is innumerably floating upward is formed.

FIG. 7 and FIG. 8 show the adhesive particle floating atmosphere A.
A second embodiment of the forming means is shown, in which the brush body is replaced with a cylindrical brush body 20a, and an infinite belt brush body 20 in which hard bristles 21 are implanted.
b. A pressurized air nozzle 25 is provided instead of the projecting piece 23,
The hard bristles 21 are vibrated by applying the pressurized air K to the hard bristles 21 of the rotating infinite belt brush body 20b.

By adding a cover 27 and a suction device 26,
The scattering of the floating adhesive particles can be prevented.

[0017]

According to the present invention, it is possible to achieve a desired adhesive fixation with a smaller amount of adhesive, to reduce the problem of health impairment caused by the adhesive, and to reduce the manufacturing cost. ,

[Brief description of the drawings]

FIG. 1 shows a decorative sheet for building material having a surface coated with a granular hot melt adhesive applied thereto, wherein FIG. 1A is a longitudinal sectional view and FIG.

FIG. 2 is an explanatory view of means for forming a granular hot melt adhesive applied surface on a decorative sheet for building material.

FIGS. 3A and 3B show a body fluid absorber on which a granular hot melt adhesive applied surface is formed, wherein FIG. 3A is a longitudinal sectional view and FIG. 3B is a partially enlarged plan view of the granular hot melt adhesive applied surface.

FIG. 4 is an explanatory view of a means for forming a granular hot melt adhesive applied surface on a body fluid absorber.

FIG. 5 is a longitudinal sectional view showing a first embodiment of a means for forming an adhesive particle floating atmosphere.

FIG. 6 is a plan view of the same.

FIG. 7 is a longitudinal sectional view showing a second embodiment of a means for forming an atmosphere of floating adhesive particles.

FIG. 8 is a plan view of the same. A Adhesive granule floating atmosphere B Granular hot-melt adhesive coated surface P Granular hot-melt adhesive Decorative sheet for building materials 2 Coating line 10 Body fluid absorber 16 Coating line Brush body 21 Protrusion 25 Pressurized air nozzle

Claims (3)

[Claims] 1. An adhesive particle floating atmosphere in which a particulate hot melt adhesive is innumerably floating is formed, and a coating surface of a coating base material being transferred through a coating line is opposed to a lower surface of the adhesive particle floating atmosphere, A hot-melt adhesive application method, comprising attaching a myriad of granular hot-melt adhesives to an application surface of an application substrate. 2. A substrate for application in the production of a liquid absorbing core layer, a liquid-permeable thin layer, a liquid-impermeable backsheet, and, if necessary, an additional thin layer between the layers. In an application line for applying a hot-melt adhesive to an application surface between the respective layers of the body fluid absorber, an adhesive particle floating atmosphere in which the granular hot-melt adhesive is innumerably floated is applied to the application base material being transferred through the application line. An innumerable granular hot-melt adhesive is applied to the coating surface of the layer constituting the body fluid absorber, which is a coating substrate, and formed in such a manner as to face the upper side of the surface. A hot melt adhesive applying method, wherein the hot melt adhesive is adhered and fixed at the point-like adhesive points. 3. A hot-melt adhesive applying method for applying a hot-melt adhesive above an application surface of an application substrate being transferred on an application line, wherein a brush body having hard bristles is rotated and driven to apply the hot-melt adhesive. Position the peripheral surface of the brush body at the opening of the adhesive supply hole, apply hot-melt adhesive to the tip of the hard bristles of the brush body, and apply the hard bristles of the cylindrical brush body coated with the hot-melt adhesive. Causing vibration at the tip,
The hot melt adhesive applied to the tip of the hard bristle of the cylindrical brush body is separated from the hard bristle of the brush body, and countless granular hot melt adhesives are applied above the coating surface of the base material being transferred on the coating line. An adhesive particle floating atmosphere is formed, and a granular hot melt adhesive that floats the adhesive particle floating atmosphere is attached to the coating surface of the coating substrate being transported through the coating line, thereby forming the coating surface of the coating substrate. A hot melt adhesive application method in an application line, wherein a number of points of a granular hot melt adhesive are adhered to each other, and are adhered and fixed at an infinite number of points of adhesion.