JP7296284B2 - Method for manufacturing sponge with tape, and apparatus for manufacturing sponge with tape - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a taped sponge manufacturing method and a taped sponge manufacturing apparatus.

The following method has been disclosed as a method of attaching a double-sided tape to an article.
For example, Patent Literature 1 discloses a method of attaching a double-sided adhesive tape to a foamed plastic sheet with a press roll.
Further, Patent Document 2 discloses a method of supplying a belt-shaped adhesive tape toward a work placed and held, and affixing the adhesive tape to the surface of the work by bringing an application roller into contact with the surface of the supplied adhesive tape. disclosed.

JP-A-63-224928 JP-A-2004-221469

However, when the above-described method is used to attach the double-sided tape to the sponge sheet, there are the following problems. That is, since the surface of the sponge sheet is uneven, air bubbles remain when the double-sided tape is applied.
The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a taped sponge in which air entrainment is suppressed. The present disclosure can be implemented as the following forms.

[1] A method for producing a sponge with tape, wherein a double-sided tape is attached to one side of a continuously conveyed sponge sheet, comprising:
When the double-sided tape is attached to the sponge sheet, one surface of the double-sided tape is pressed by an edge of a plate-shaped elastic body, and a part of the other surface of the double-sided tape is pressed against the one surface of the sponge sheet. A method for manufacturing a sponge with tape, wherein the double-sided tape is attached to one side of the sponge sheet while compressing and deforming the portion of the sponge sheet that is in contact with the double-sided tape in the thickness direction of the sponge sheet. .

The method for producing a taped sponge according to the present disclosure provides a taped sponge in which air entrainment is suppressed.

FIG. 1 is a schematic side view of an example of a manufacturing apparatus used in a method for manufacturing a sponge with tape. FIG. 2 is a schematic perspective view of an example of a manufacturing apparatus used in the method of manufacturing a sponge with tape. FIG. 3 is a schematic plan view of an example of a manufacturing apparatus used in the method of manufacturing a sponge with tape. FIG. 4 is a side view schematically showing a state in which the double-sided tape is attached.

A preferred example of the present disclosure will now be presented.
[2] The manufacturing method of the sponge with tape according to [1], wherein the elastic body is curved when pressing the one surface of the double-sided tape with the elastic body.

[3] The method for producing a sponge with tape according to [1] or [2], wherein the pressing force of the elastic body is variable.

[4] The method for producing a sponge with tape according to any one of [1] to [3], wherein the elastic body is a leaf spring.

[5] The elastic body is installed so as to intersect the conveying direction of the sponge sheet,
[1] to [4], wherein the elastic body traverses the sponge sheet, and the side end of the elastic body extends to an outer position beyond the side end of the sponge sheet; A method for producing a sponge with tape according to any one of items 1 to 3.

[6] An apparatus for manufacturing a sponge with tape,
a conveying unit that continuously conveys the sponge sheet;
a double-sided tape supply unit that supplies the double-sided tape so that the double-sided tape faces the sponge sheet;
An attachment unit for attaching the double-sided tape to one side of the sponge sheet,
One surface of the double-sided tape is pressed to the attaching portion, and a part of the other surface of the double-sided tape is pressed against and brought into contact with the one surface of the sponge sheet, and the double-sided tape of the sponge sheet is in contact. a plate-like elastic body for attaching the double-sided tape to the one side of the sponge sheet while compressing and deforming the portion that has been pressed in the thickness direction of the sponge sheet,
An apparatus for manufacturing a sponge with tape, wherein the edge of the elastic body presses the one surface of the double-sided tape.

The present disclosure will be described in detail below. Note that the notation indicating the range of "x to y" includes x and y unless otherwise specified.

1. Tape-attached sponge manufacturing method and manufacturing apparatus The tape-attached sponge 1 manufacturing method of the present embodiment is a manufacturing method in which a double-sided tape 5 is attached to one side 3A of a continuously conveyed sponge sheet 3 . The sponge sheet 3 is strip-shaped.
When attaching the double-sided tape 5 to the sponge sheet 3, the double-sided tape 5 is attached to one side 3A of the sponge sheet 3 as follows. That is, the edge 7A of the plate-like elastic body 7 presses the one side 5A of the double-sided tape 5, and the part 5C of the other side 5B of the double-sided tape 5 is pressed against the one side 3A of the sponge sheet 3 and brought into contact. The double-sided tape 5 is attached to one side 3A of the sponge sheet 3 while compressing and deforming the portion 3B of the sponge sheet 3 in contact with the double-sided tape 5 in the thickness direction of the sponge sheet 3. - 特許庁

Here, an example of a suitable manufacturing apparatus 11 for realizing the manufacturing method described above will be described. The manufacturing apparatus 11 includes a conveying section 13 , a double-sided tape supplying section 15 and an attaching section 17 .
The transport unit 13 continuously transports the sponge sheet 3 . In FIG. 1, the sponge sheet 3 is conveyed from left to right. The conveying unit 13 is not particularly limited. As the transport unit 13, for example, a transport belt (belt conveyor) is exemplified. The conveying belt is driven by a driving mechanism such as an electric motor. A conveying speed is not particularly limited. A conveying speed of, for example, 6 m/min or more and 8 m/min or less is preferably adopted.
The double-sided tape supply unit 15 supplies the double-sided tape 5 to the sponge sheet 3 so that the double-sided tape 5 faces the sponge sheet 3 . The double-sided tape 5 is strip-shaped and has adhesive layers 18 on both sides of a substrate 16 . On one side 5A of the double-sided tape 5, the adhesive layer 18 is covered with a release paper 19. As shown in FIG. On the other surface 5B of the double-sided tape 5, the adhesive layer 18 is exposed. In the double-sided tape supplying section 15, the double-sided tape 5 is wound into a roll. The double-sided tape supply unit 15 supplies the double-sided tape 5 so that the adhesive layer 18 on the other side 5B of the double-sided tape 5 faces the one side 3A of the sponge sheet 3 .

The sticking part 17 sticks the double-sided tape 5 on one side 3A of the sponge sheet 3. - 特許庁The sticking portion 17 includes a plate-like elastic body 7 . As the elastic body 7, a leaf spring (for example, a leaf spring (heat-treated product) made of spring steel having a thickness of 0.3 mm or more and 0.5 mm or less) is preferable. The shape of the elastic body 7 is not particularly limited. The edge 7A of the elastic body 7 is preferably straight. It is preferable that the edge 7A is straight and crosses (for example, perpendicular to) the conveying direction of the sponge sheet 3 (arrow direction in FIG. 3), and the edge 7A presses the one surface 5A of the double-sided tape 5. In this case, the elastic body 7 comes into contact with the double-sided tape 5 in a straight line, and a uniform pressure is applied to the sponge sheet 3 in the width direction. .
In addition, in the manufacturing apparatus 11, it is preferable that the edge 7A is configured to be observable from the outside so that the edge 7A can be visually confirmed.

A rear portion 7B of the elastic body 7 opposite to the edge 7A is fixed by a holding portion 21 . By controlling the length of the rear portion 7B of the elastic body 7 held by the holding portion 21, the projection length 7D of the elastic body 7 can be adjusted. Further, by changing the relative positional relationship between the holding portion 21 and the sponge sheet 3, the curved state of the elastic body 7 can be changed. The elastic force of the elastic body 7 is controlled by at least one of adjusting the length of protrusion of the elastic body 7 and adjusting the relative positional relationship between the holding portion 21 and the sponge sheet 3 , so that the elastic body 7 is attached to the double-sided tape 5 . The pressure (pressing force) that presses the one surface 5A of the can be easily controlled. The pressing force can also be changed by changing the elastic body 7 itself, for example, by changing the material of the leaf spring and the thickness of the leaf spring.

In this embodiment, the width of the double-sided tape 5 and the width of the sponge sheet 3 are substantially the same. In FIG. 3, the double-sided tape 5 and the sponge sheet 3 are vertically overlapped, and the side edge 5D of the double-sided tape 5 and the side edge 3D of the sponge sheet 3 are also overlapped. The width of the elastic body 7 is larger than the width of the double-sided tape 5 and the width of the sponge sheet 3 . The elastic body 7 crosses the double-sided tape 5 and the sponge sheet 3 , and the side end 7C of the elastic body 7 extends beyond the side end 3D of the sponge sheet 3 to an outside position.

The material of the sponge sheet 3 is not particularly limited. Materials include ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), hydrin rubber (CO, ECO, etc.), silicone rubber, urethane rubber, styrene-butadiene rubber (SBR), natural rubber (NR), isoprene rubber (IR ), chloroprene rubber (CR), and the like. Preferred are ethylene propylene diene rubber, nitrile rubber and hydrin rubber. These can be used singly or in combination of two or more.
The width of the sponge sheet 3 is not particularly limited. The width of the sponge sheet 3 is appropriately changed according to the application, but is preferably 100 mm or more and 200 mm or less, for example.

The 25% compressive load of the sponge sheet 3 is not particularly limited. When the double-sided tape 5 is attached, the 25% compression load is preferably 30 kPa or more and 100 kPa or less, preferably 40 kPa, from the viewpoint of flattening the unevenness of the surface (one side 3A) of the sponge sheet 3 and effectively suppressing air entrainment. 85 kPa or less is more preferable.
The method for measuring the 25% compression load is as follows.
[1] Cut (punch) into a sample size (30 mm×30 mm).
[2] Measure the thickness at three points with a thickness gauge (Tekclock PG-20) and take the average.
[3] Compress with an autograph (load speed: 10 mm/min).
[4] Read the load at 25% compression.
[5] Divide the load of [4] by 900 mm ² to obtain the value.

The specific gravity of the sponge sheet 3 is not particularly limited. When attaching the double-sided tape 5, the specific gravity is preferably 0.15 or more and 0.8 or less from the viewpoint of flattening the unevenness of the surface (one side 3A) of the sponge sheet 3 and effectively suppressing air entrainment. 0.25 or more and 0.6 or less is more preferable.

The hardness of the sponge sheet 3 is not particularly limited. When the double-sided tape 5 is attached, the surface (one side 3A) of the sponge sheet 3 is flattened to have unevenness, and from the viewpoint of effectively suppressing air entrainment, the hardness is ASCER on the Asker C scale (JIS K 7312). C15 or more and ASCER C40 or less are preferable, and ASCER C20 or more and ASCER C35 or less are more preferable.

2. Functions and Effects of the Present Embodiment The conveying section 13 continuously conveys the sponge sheet 3 . The double-sided tape supply unit 15 supplies the double-sided tape 5 onto the sponge sheet 3 . The one surface 5A of the double-sided tape 5 is pressed by the edge 7A of the plate-like elastic body 7, and the part 5C of the other surface 5B of the double-sided tape 5 is pressed against the one surface 3A of the sponge sheet 3 and brought into contact. The double-sided tape 5 is attached to one side 3A of the sponge sheet 3 while compressing and deforming the portion 3B of the sponge sheet 3 in contact with the double-sided tape 5 in the thickness direction of the sponge sheet 3.例文帳に追加Since the portion 3B with which the double-sided tape 5 is in contact is compressed and deformed in the thickness direction of the sponge sheet 3 at the time of sticking, the unevenness of the surface of the sponge sheet 3 at this portion 3B on one side 3A of the sponge sheet 3 is reduced and air is not trapped. The double-sided tape 5 is attached to the . Therefore, in this manufacturing method, the sponge with tape 1 in which air entrainment is suppressed is continuously manufactured.

Further, since the edge 7A is in linear contact with the double-sided tape 5, a sufficient pressing force can be applied to the double-sided tape 5 even if the elastic force generated by bending the plate-like elastic body 7 is not so high. can be done. Therefore, this manufacturing method is highly effective in suppressing air entrainment. By the way, when a pasting roller is used as in the past, when the double-sided tape 5 is pressed by the pasting roller, the double-sided tape 5 deforms along the outer surface of the pasting roller, and the contact area between the pasting roller and the double-sided tape 5 is reduced. It's getting bigger. For this reason, in order to suppress air entrapment, it is necessary to apply a high pressure to the bonding roller, which increases the cost of manufacturing equipment and causes various problems caused by high pressure, such as the sponge sheet 3 meandering. there was a problem. On the other hand, in this embodiment, since the plate-like elastic body 7 is used, it is simple and effective in suppressing air entrapment.

Further, in this embodiment, when the elastic body 7 presses the one surface 5A of the double-sided tape 5, the elastic body 7 is curved, that is, the elastic body 7 is flexed. In this embodiment, since the elastic force generated by bending the elastic body 7 is used as the pressing force, there is no need for a device for applying pressure to the joining roller, which is advantageous in terms of cost.

Moreover, in this embodiment, the pressing force can be easily controlled by controlling the elastic force of the elastic body 7 . Therefore, it is possible to adjust the pressing force appropriately according to the property of the sponge sheet 3, and obtain an excellent effect of suppressing air entrainment.

Further, in the present embodiment, by visually observing the state of the vicinity of the edge 7A of the elastic body 7, the degree of compression of the sponge sheet 3 can be confirmed. Therefore, when the hardness of the sponge sheet 3 changes, it is easy to adjust the pressing force appropriately while checking the degree of compression. When a pasting roller is used as in the conventional art, when the double-sided tape 5 is pressed by the pasting roller, a high pressure is applied to the top of the pasting roller. Confirmation is difficult, and adjustment to an appropriate pressing force is difficult.

In addition, in the present embodiment, the elastic body 7 is installed so as to intersect the direction in which the sponge sheet 3 is conveyed, the elastic body 7 crosses the sponge sheet 3, and the side ends 7C of the elastic body 7 extends to an outside position beyond the side edge 3D of the sponge sheet 3. As shown in FIG. Therefore, as shown in FIG. 4, the degree of compression of the sponge sheet 3 can be visually checked from the side. Therefore, when the hardness of the sponge sheet 3 changes, it is easy to adjust the pressing force appropriately while checking the degree of compression.

The present invention is not limited to the embodiments detailed above, and various modifications and changes are possible within the scope of the claims of the present invention.

REFERENCE SIGNS LIST 1 : sponge with tape 3 : sponge sheet 3A : one side 3B : portion 3D : side end 5 : double-sided tape 5A : one side 5B : other side 5C : part 7 : elastic body 7A : edge 7B : rear 7C : side end 7D...Protrusion length 11...Manufacturing device 13...Conveyor part 15...Double-sided tape supply part 16...Base material 17...Applying part 18...Adhesive layer 19...Release paper 21...Holding part

Claims (6)

A method for manufacturing a sponge with tape, wherein a double-sided tape is attached to one side of a continuously conveyed sponge sheet, comprising:
When the double-sided tape is attached to the sponge sheet, one surface of the double-sided tape is pressed by an edge of a plate-shaped elastic body, and a part of the other surface of the double-sided tape is pressed against the one surface of the sponge sheet. A method for manufacturing a sponge with tape, wherein the double-sided tape is attached to one side of the sponge sheet while compressing and deforming the portion of the sponge sheet that is in contact with the double-sided tape in the thickness direction of the sponge sheet. . 2. The method of manufacturing a sponge with tape according to claim 1, wherein the elastic body is curved when pressing the one surface of the double-sided tape with the elastic body. 3. The method of manufacturing a sponge with tape according to claim 1, wherein the pressing force of said elastic body is variable. The method for producing a sponge with tape according to any one of claims 1 to 3, wherein the elastic body is a leaf spring. The elastic body is installed so as to intersect the conveying direction of the sponge sheet,
5. The elastic body traverses the sponge sheet, and the side end of the elastic body extends to an outer position beyond the side end of the sponge sheet. 2. A method for producing a taped sponge according to item 1. An apparatus for manufacturing a taped sponge,
a conveying unit that continuously conveys the sponge sheet;
a double-sided tape supply unit that supplies the double-sided tape so that the double-sided tape faces the sponge sheet;
An attachment unit for attaching the double-sided tape to one side of the sponge sheet,
One surface of the double-sided tape is pressed to the attaching portion, and a part of the other surface of the double-sided tape is pressed against and brought into contact with the one surface of the sponge sheet, and the double-sided tape of the sponge sheet is in contact. a plate-like elastic body for attaching the double-sided tape to the one side of the sponge sheet while compressing and deforming the portion that has been pressed in the thickness direction of the sponge sheet,
An apparatus for manufacturing a sponge with tape, wherein the edge of the elastic body presses the one surface of the double-sided tape.

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