JP6178291B2 - Filter manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a filter, and more particularly to a method for manufacturing a filter attached to a ventilation fan, a range hood, or the like.

  Conventionally, in filters such as ventilation fans and range hoods, filters that can easily display the filter replacement time by displaying figures and characters on the surface of the filter to know how dirty the filter is are known. .

  For example, Japanese Patent No. 4082648 (Patent Document 1) discloses a filter in which a non-woven fabric is coated with a character-like or character-like adhesive material that indicates the replacement time. It is disclosed that a release paper is attached on an adhesive applied to a nonwoven fabric, and that the release paper is peeled off at the time of use.

  On the other hand, Japanese Patent No. 3703811 (Patent Document 2) discloses a method for manufacturing a filter that displays the replacement time. The nonwoven fabric sheet is printed by printing the letter or design adhesive on the release paper with a relief roll, drying the adhesive in the drying zone, and then laminating the release paper and the nonwoven fabric sheet with a laminating roll. A process of transferring an adhesive to the sheet is disclosed.

Japanese Patent No. 4082648 Japanese Patent No. 3703811

  As described above, the conventional filter manufacturing method prints the adhesive on the release paper, dries the adhesive on the release paper in the drying zone, and then laminates the release paper on which the adhesive is printed and the nonwoven sheet. By doing so, the adhesive was transferred to the nonwoven fabric sheet.

  In the conventional filter manufacturing method, it is necessary to once laminate an adhesive for instructing the filter replacement time on the release paper, and to provide a drying zone for drying the adhesive, which greatly increases the size of the equipment.

  Therefore, in order to reduce the size of the equipment, an attempt was made to use a hot melt adhesive as an adhesive and omit the drying zone. The hot melt adhesive is an adhesive mainly composed of a thermoplastic resin that is solid at normal temperature and liquid at high temperature, and is solidified and bonded in a short time by cooling.

  Specifically, after a hot melt adhesive was deposited on the convex portion of the relief roll, an attempt was made to transfer the hot melt to release paper. At this time, a releasable film was formed on the surface of the convex portion of the relief roll, and the release paper was subjected to silicone processing that exhibited releasability.

  However, in the method of transferring the hot melt adhesive to the release paper, the release paper release property is higher than the release property of the convex portion of the relief roll, so the hot melt adhesive adhered on the convex portion is peeled off well. It could not be transferred to paper, and the hot melt adhesive remained on the protrusions.

  On the other hand, if the releasability of the release paper is lower than the releasability of the convex part of the relief roll, it is possible to transfer all the hot melt adhesive on the convex part to the release paper. However, when the release paper is peeled off during use of the filter by reducing the release property of the release paper, the adhesive of the hot melt adhesive may remain on the release paper. Thus, it is difficult to adjust the releasability between the release paper and the convex portion of the relief roll, and it is difficult to transfer the hot melt adhesive attached to the convex portion of the relief roll to the release paper.

  The present invention has been made to solve the above-described problems, and its object is to provide a method for manufacturing a filter that can reduce the size of equipment while using a conventional nonwoven fabric or release paper. The purpose is to do.

  For this purpose, the filter manufacturing method according to the present invention comprises a step of preparing a relief printing roll having a predetermined projection pattern, which is rotationally driven, and a pressing roller rotating in contact with the relief printing roll, The hot melt adhesive adhered on the convex pattern of the relief printing roll is applied to the nonwoven fabric by passing the nonwoven fabric constituting the filter between the relief printing roll and the pressing roller. And the step of transferring to

  Preferably, the method includes a step of overlaying a release paper on the non-woven hot melt adhesive so as to cover the hot melt adhesive.

  Preferably, a hot melt adhesive is adhered on the convex pattern of the relief roll via an adhesion roller.

  Preferably, the convex pattern includes a display element that displays the replacement time.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the filter which can reduce an installation can be provided, utilizing the conventional nonwoven fabric and release paper.

It is sectional drawing of the filter in embodiment of this invention. 1 is a schematic diagram showing a filter manufacturing apparatus in an embodiment of the present invention. It is an outline figure showing a manufacturing method of a filter in other embodiments of the present invention. It is a flowchart which shows the manufacturing method of the filter in embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  First, prior to the description of the filter manufacturing method, an outline of the filter will be described.

  1C and 1D are sectional views of a filter showing a state before use and a use state, respectively. Referring to FIG. 1C, the filter 1 includes a nonwoven fabric 2, a hot melt adhesive 5 directly transferred to the nonwoven fabric 2, and a release paper 3 superimposed on the hot melt adhesive 5.

  The nonwoven fabric 2 can use the well-known nonwoven fabric used for a normal filter without a restriction | limiting in particular, and has a rectangular shape fundamentally. The nonwoven fabric 2 is for filtering air and adheres dirt to the surface by use.

  As the hot melt adhesive 5, for example, an acrylic one is used and transferred onto the nonwoven fabric 2. The transfer method will be described later. The hot melt adhesive 5 is an attachment portion to a ventilation fan, a range hood, or the like, and includes a display element that displays a replacement time. As the display element, for example, a character, a design, or the like is used.

  As the release paper 3, for example, a film having a silicone component that exhibits releasability on the surface is used. The release paper 3 is laminated and bonded onto the hot melt adhesive 5 transferred to the nonwoven fabric 2. At the time of use, the release paper 3 is removed, but at this time, the adhesion of the hot melt adhesive 5 does not remain on the release paper 3.

  Prior to use of the filter 1, as shown in FIG. 1C, the release paper 3 is superimposed on the hot melt adhesive 5. On the other hand, when attaching the filter 1 to a ventilation fan or the like, the release paper 3 is removed as shown in FIG.

  In use, the gas does not pass through the portion of the display element formed of the hot melt adhesive 5. On the other hand, the portion where the hot melt adhesive 5 has not been transferred absorbs dirt and gradually changes color. For this reason, when dirt or the like is accumulated, a message character that displays the filter replacement time rises.

  When the display element is lifted, the user removes the filter 1 from the ventilation fan or the like, removes only the release paper 3 from the new filter 1 in FIG. 1C, and attaches it to the ventilation fan or the like. At this time, the adhesive of the hot melt adhesive 5 does not remain on the release paper 3.

  Next, an outline of a filter manufacturing apparatus according to an embodiment of the present invention will be described.

  Referring to FIG. 2, the filter manufacturing apparatus includes at least a predetermined convex pattern 131, a rotationally driven relief printing roll 13, and a pressing roller 14 that rotates in contact with the relief printing roll 13. Prepare. The relief roll 13 and the pressing roller 14 pass the nonwoven fabric 2 between them.

  Further, as a member for attaching the hot melt adhesive 5 onto the convex pattern 131 of the relief printing roll 13, an adhesion roller 12 that contacts the relief printing roll 13 may be provided. Further, the fixing roll 11 may be in contact with the adhesion roller 12.

  The solid hot-melt adhesive 5a is placed on the fixed roll 11 and the adhesion roller 12, and is dissolved by heating.

  Or you may use the hot-melt supply machine 20 as shown in FIG. Specifically, a solid hot melt adhesive is dissolved in a tank 21 of a hot melt supply machine 20, and the hot melt adhesive 5 is placed on the fixing roll 11 and the adhesion roller 12 by a nozzle 23 connected via a hose 22. It is also possible to supply By using the hot melt feeder 20, the hot melt adhesive 5 can be easily used in large quantities. The hot melt feeder 20 can be used without any particular limitation on what is normally used.

  Further, the melted hot melt adhesive 5 adheres to the surface of the adhesion roller 12 that is rotationally driven. Since the adhesion roller 12 and the relief roll 13 are in contact with each other and driven to rotate, the hot melt adhesive 5 adheres on the convex pattern 131. Further, the hot melt adhesive 5 is transferred to the nonwoven fabric 2 that passes between the relief roll 13 and the pressing roller 14.

  Here, the relief roll 13 will be described. The relief roll 13 has a metal base plate 132 and a convex pattern 131. The convex pattern 131 is formed by sticking a silicone-containing resin on the surface of the metal base plate 132 by a known method. Since the convex pattern 131 has a release film formed on the surface thereof, the hot melt adhesive 5 attached to the convex pattern 131 can be easily transferred to the nonwoven fabric 2. Since the hot melt adhesive 5 is transferred directly from the convex pattern 131 to the nonwoven fabric 2, it is not necessary to consider the releasability of the convex pattern 131.

  The convex pattern 131 can have any shape, for example, a character, a figure, or the like that constitutes a display element that displays the replacement time. Since the convex pattern 131 is not integrally formed with the metal base plate 132, it can be formed in an arbitrary shape according to the use of the filter.

  Furthermore, the filter manufacturing apparatus may include a first roller 15 and a second roller 16 that rotate while contacting each other. The first roller 15 and the second roller 16 overlap the release paper 3 on the hot melt adhesive 5 so as to cover the hot melt adhesive 5 transferred onto the nonwoven fabric 2.

  A manufacturing process of the filter according to the embodiment of the present invention will be described.

  With reference to FIGS. 1-4, the relief printing roll 13 and the press roller 14 are prepared first (process P1). The relief roll 13 is driven to rotate, and the pressing roller 14 rotates in contact with the relief roll 13.

  Next, a hot melt adhesive is deposited on the convex pattern 131 of the relief roll 13 (process P2).

  Specifically, first, the hot melt adhesive 5 is adhered on the adhesion roller 12 (process P21). More specifically, the fixed roll 11 and the adhesion roller 12 are brought into contact with each other, and the solid hot melt adhesive 5a is placed between them. The fixed roll 11 is fixed so as not to rotate, and the adhesion roller 12 rotates in the direction of the arrow. When the fixing roll 11 and the adhesion roller 12 are heated, the solid hot-melt adhesive 5a is melted due to its characteristics. Thereby, the melted hot melt adhesive 5 flows down from the gap between the fixed roll 11 and the adhesion roller 12 and adheres to the outer peripheral surface of the adhesion roller 12.

  Furthermore, the hot melt adhesive 5 is adhered on the convex pattern 131 of the relief roll 13 (process P22). Since the adhesion roller 12 and the relief roll 13 are in contact with each other and are rotationally driven, the hot melt adhesive 5 can be adhered onto the convex pattern 131 of the relief roll 13 via the adhesion roller 12.

  Subsequent to the process P2 (process P22), the nonwoven fabric 2 is passed between the relief roll 13 and the pressing roller 14, and the hot melt adhesive 5 adhered on the convex pattern 131 of the relief roll 13 is transferred onto the nonwoven fabric 2 ( Step P3).

  Specifically, first, the nonwoven fabric 2 constituting the filter 1 shown in FIG. 1A is unwound along the arrow direction shown in FIG. 2 and supplied between the relief roll 13 and the pressing roller 14. . The hot melt adhesive 5 adhering to the convex pattern 131 of the letterpress roll 13 is transferred to the back surface of the nonwoven fabric 2 by the rotation of the letterpress roll 13 and the pressing roller 14 as shown in FIG. . Since the convex pattern 131 is formed of a silicone-containing resin, it is excellent in releasability, and the hot melt adhesive 5 attached to the convex pattern 131 is transferred to the nonwoven fabric 2.

  Finally, the release paper 3 is overlaid on the hot melt adhesive 5 of the nonwoven fabric 2 so as to cover the hot melt adhesive 5 (process P4).

  The nonwoven fabric 2 and the release paper 3 to which the hot melt adhesive 5 shown in FIG. 1B is transferred are unwound along the directions of the arrows, and the pair of the first roller 15 and the second roller 16 are unrolled. Supplied in between. Furthermore, the release paper 3 passes through a pair of first roller 15 and second roller 16 that rotate while being in contact with each other, so that the release paper 3 has a non-woven fabric 2 having a hot melt adhesive 5 as shown in FIG. In between, it is laminated with the release paper 3 and bonded together. As the release paper 3, a film having a silicone component exhibiting releasability on the surface is used, but the hot melt adhesive 5 of the convex pattern 131 has already been transferred to the nonwoven fabric 2 in the process P3. Therefore, it is not necessary to be aware of the relationship between the release property of the convex pattern 131 and the release property of the release paper 3.

  In the embodiment of the present invention, unlike the conventional manufacturing method, it is not necessary to provide an adhesive drying step, so that the equipment can be downsized. Moreover, the nonwoven fabric 2 and the release paper 3 can be the same as the conventional one or a known one, and it is not necessary to adjust the releasability of the release paper 3.

  In the above embodiment, the filter 1 has the nonwoven fabric 2, the hot melt adhesive 5, and the release paper 3. However, like the filter 1a, the filter 1 is on the hot melt adhesive 5 directly transferred to the nonwoven fabric 2. The release paper 3 may not be superimposed.

  Moreover, in the said embodiment, although the roller 12 for adhesion was used as a method of attaching the hot-melt-adhesive agent 5 on the convex part pattern 131 of the letterpress roll 13, it is not restricted to this, Directly on the convex part pattern 131 Hot melt adhesive 5 may be applied.

  In addition, as a method of covering the release paper 3 on the nonwoven fabric 2 having the hot melt adhesive 5, the first roller 15 and the second roller 16 that rotate while abutting each other are used. Or by other methods.

  Furthermore, in the said embodiment, the process P3 which transfers the hot-melt-adhesive 5 on the nonwoven fabric 2, and the process P4 which overlaps the release paper 3 on the nonwoven fabric 2 which has the hot-melt-adhesive 5 were made into the continuous process. However, the present invention is not limited to this, and it may be wound up once in step P3 and separately bonded to the release paper 3 in step P4.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  DESCRIPTION OF SYMBOLS 1 Filter, 2 nonwoven fabric, 3 release paper, 5 hot melt adhesive, 11 fixed roll, 12 adhesion roller, 13 letterpress roll, 14 press roller, 15 1st roller, 16 2nd roller, 20 hot melt supply machine , 21 tank, 22 nozzles, 23 heads, 131 convex pattern.

Claims (4)

A step of preparing a relief roll that has a predetermined convex pattern and is driven to rotate, and a pressing roller that rotates in contact with the relief roll, and
Attaching a hot melt adhesive on the convex pattern;
Transferring the hot melt adhesive adhered on the convex pattern of the relief roll onto the nonwoven fabric by passing the nonwoven fabric constituting the filter between the relief roll and the pressing roller. The manufacturing method of the filter.   The method for producing a filter according to claim 1, wherein release paper is superimposed on the hot melt adhesive of the nonwoven fabric so as to cover the hot melt adhesive.   The manufacturing method of the filter of Claim 1 or 2 which makes the said hot-melt-adhesive adhere on the said convex part pattern of the said letterpress roll via the roller for adhesion.   The said convex part pattern is a manufacturing method of the filter in any one of Claims 1-3 containing the display element which displays replacement | exchange time.

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