JPH07150122A - Joining tape and laminate structure of foam - Google Patents

Abstract

PURPOSE:To obtain a joining tape whereby the firm bonding and lamination of foamed sheets can be accomplished because the pressuresensitive adhesive layer exhibits initial tack to the foamed sheet to be bonded, and the hot melt adhesive layer fuses with another foamed sheet to be laminated by forming the above pressure-sensitive adhesive layer on one surface of a support and forming the above hot melt adhesive layer on the other surface of the support. CONSTITUTION:As the support, a film of a synthetic resin, cellophane or the like, woven or nonwoven fabric such as victoria lawn or the like is used. It is suitable that the tensile strength of the support is 5-30kg/cm<2>, that the 'metsuke' of the nonwoven fabric is 20-200g/m<2>, and that the opening rate of the knit is 30-70%. As the pressure-sensitive adhesive, an adhesive based on an acrylic resin or a rubbery polymer and containing a tackifying resin is used. As the hot melt adhesive, one having an activation temperature of 70-150 deg.C is suitable. It requires that the total thickness of the support, the pressure-sensitive adhesive layer and the hot melt adhesive layer should be 1mm or below. Fig. shows an example of the objective tape prepared by coating one surface of a nonwoven polyester fiber fabric 11 with a two-pack solvent-based acrylic pressure-sensitive adhesive layer 12 and coating the other surface of the fabric with a hot melt film 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can provide a thick foam by connecting synthetic resin foam sheets to each other and laminating another foam sheet or the like on the connecting portion. The present invention relates to a laminated structure of a relay tape and a foam for adhering the adherend to another adherend.

[0002]

2. Description of the Related Art A synthetic resin foam sheet made of a polyolefin resin such as polyethylene, polypropylene, polybutene, ethylene vinyl acetate copolymer or vinyl chloride resin is used for various purposes due to its excellent cushioning properties and heat insulation properties. Has been done. In order to manufacture a thick foam such as a bathroom mat using the above foam sheet, it is necessary to stack a number of thin foam sheets and bond or laminate them by heat fusion or an adhesive. It is being appreciated.

The foamed sheet is manufactured as a long piece having a fixed length. However, when the end portion of the foamed sheet appears during the secondary processing, the start point of the next new foamed sheet for continuous secondary processing. Processing is continued by connecting to the section by a relay.
Conventionally, for intermediate splicing, as shown in FIG. 4, the end portions of the foamed sheets 4 and 4 are overlapped and a single-sided adhesive tape 5 such as a cloth tape or a kraft tape is attached and joined, or
As shown in Fig. 6, the ends of the foamed sheets 4, 4 are butted against each other and the one-sided adhesive tape 5 is attached, and as shown in Fig. 6, the butted faces of the ends of the foamed sheets 4, 4 are heat-sealed. It is performed by joining. 6 is a heat-sealing part.

[0004]

When the ends of the foamed sheets are overlapped with each other and a single-sided adhesive tape is adhered to the foamed sheet and the foamed sheet is superposed on another foamed sheet, this portion is bulged. It cannot be part and must be discarded as scrap.

Further, when a single-sided adhesive tape is adhered to and joined to the abutting portion of the ends of the foamed sheet, the one-sided adhesive tape is subjected to a peeling treatment such as silicon on the surface opposite to the adhesive surface. Therefore, even if another foamed sheet is laminated on this, this portion cannot be heat-sealed to the foamed sheet and cannot be adhered by an adhesive, so that the lamination strength becomes low. Therefore, this part must be discarded as scrap. Further, when the ends of the foamed sheets are butted against each other and heat-sealed, a gap is created at the butted surfaces, swelling is likely to occur, and the joining area is small, so that high joining strength cannot be obtained.

A double-sided pressure-sensitive adhesive tape may be used as a relay tape for laminating thin foamed sheets to form a thick foam, but the double-sided pressure-sensitive adhesive tape has adhesiveness on both sides at room temperature. Therefore, there is a problem in that the foamed sheet is cut while being touched by a guide roll or the like while being transferred to the laminating apparatus or the tension is abnormal due to the adhesive force.

The present invention solves the above-mentioned problems of the prior art, and the splicing portion is not discarded as scrap, and another foaming sheet or the like is laminated on the splicing portion to swell the splicing portion even as a thick foam. It is also an object of the present invention to provide a laminated structure of an intermediate joint tape and a foam, which is capable of adhering a foamed sheet which has been jointed together with other adherends to another adherend to have high lamination strength. .

[0008]

According to a first aspect of the present invention, there is provided a pressure-sensitive adhesive layer on one surface of a base material and a hot-melt type adhesive layer on the other surface of the base material. It is characterized by that.

The tape for filling of the present invention according to claim 2 is
The intermediate transfer tape according to claim 1, wherein the base material is made of a woven fabric or a non-woven fabric, and the fibers constituting the base material are arranged at intervals so that a large number of openings communicate with the front and back of the base material. It is characterized by being formed.

According to a third aspect of the present invention, there is provided an intermediate relay tape,
A uniaxially stretched synthetic resin film is split along the stretching direction, and the fibers are arranged side by side in the longitudinal and lateral directions with a space between them, and the intersections of the fibers are joined to connect the front and back surfaces of the base material. The pressure-sensitive adhesive layer is provided on one surface of the nonwoven fabric in which the openings are formed, and the net-like hot-melt adhesive layer is provided on the other surface of the nonwoven fabric. It is characterized in that the pressure-sensitive adhesive layer is adhered at the openings formed between the fibers of the non-woven fabric.

According to the fourth aspect of the present invention, there is provided a laminated structure of the foam according to the first aspect to the third aspect, from at least one side of the abutting portion formed by abutting the end faces of two synthetic resin foam sheets. It is characterized in that the pressure-sensitive adhesive layer of the intermediate transfer tape is intermediately bonded by being bonded, and the hot-melt adhesive layer of the intermediate transfer tape is bonded to another foam sheet or an adherend. is there.

As a base material that can be used for the intermediate tape of the present invention, a synthetic resin such as polyester, polypropylene, polyamide, vinylon or the like, a film such as cellophane, or the above synthetic resin fiber, natural fiber, glass fiber or the like is formed into a twisted yarn. Woven cloth such as a gauze cloth alternately woven, a non-woven fabric in which single fibers are laminated and the intersections of the fibers are heat-sealed or bound with a binder, and a non-woven fabric is compressed into a paper shape. To be

Further, a synthetic resin film such as polyethylene or polypropylene is uniaxially stretched, and fibers formed by splitting the film along the stretching direction are arranged in parallel at appropriate intervals. It is particularly preferable that the weft-orthogonal non-woven fabric, which is laminated in the direction and in which the intersections of the fibers are bonded, is thin and has a high strength, and has a mesh shape in which a large number of openings are formed between the fibers.

Examples of such a cross-orientation non-woven fabric include those manufactured by Nisseki Plastics Co., Ltd., trade names: Nisseki Warif, Sekisui Sof Co.

The tensile strength of the base material is 5 to 30 kg / cm.
^{About 2} is preferable. In the case of non-woven fabric, the basis weight is 2
It is preferably 0 to 200 g / m ² in terms of thickness, strength and the like. In addition, the woven fabric, the non-orthogonal cross-woven fabric, and the like have a mesh shape in which a large number of openings communicating with the front and back of the base material are formed by providing a space between the fibers. The opening ratio of the opening is preferably 30 to 70%. This is because the pressure-sensitive adhesive layer and the hot-melt type pressure-sensitive adhesive can be bonded to each other through the opening, so that the entire laminated body can be firmly bonded.

Since the above-mentioned cross-latitude orthogonal nonwoven fabric has a mesh shape, it is difficult to directly apply the pressure-sensitive adhesive layer on this one surface by using a roll coater or the like. Therefore, it is preferable to use a transfer method in which a pressure-sensitive adhesive layer separately formed by applying a pressure-sensitive adhesive to the surface of the release paper is dried and attached to the non-woven fabric surface. According to the transfer method, the pressure-sensitive adhesive layer is also formed as a continuous surface in the openings between the fibers of the nonwoven fabric.

The pressure-sensitive adhesive layer is based on an acrylic resin or a rubber-based polymer, and a tackifying resin or the like is added to the pressure-sensitive adhesive layer, which is generally used for adhesive tapes. Is selected according to the material of the foam sheet. For example, Sekisui Chemical Co., Ltd., trade name: Esdyne # 7853, Soken Chemical Industry Co., Ltd., trade name: S
K-dyne 1717 and 1720, and rubber-based pressure-sensitive adhesives manufactured by each company.

The hot melt adhesive layer may be made of polyolefin, polyamide, polyester, polyurethane or the like. These are formed in advance in a film shape, or a fibrous shape made of a three-dimensional network such as a spider web or a non-woven fabric is attached to the base material and the pressure-sensitive adhesive layer, or in a molten state. It can be laminated on the base material by applying it in a dot form.

When a mesh-like one having the above-mentioned three-dimensional structure is used as the hot-melt type adhesive layer, hot air or heat rays (infrared rays, far infrared rays) are used when the hot-melt type adhesive layer is heated and melted and bonded to the film. Etc.) is easily transmitted, and therefore not only the surface of the mesh-shaped adhesive layer but also the entire inner layer portion thereof is simultaneously activated by receiving heat. Moreover, since such an adhesive layer has a larger surface area than that of the film-shaped one, the heat receiving area is large, and the thermal activation of the entire adhesive layer is performed in an extremely short time. As a result, the time required for producing the intermediate relay tape of the present invention can be shortened and the tape can be efficiently produced.

The activation temperature of the hot-melt type adhesive layer is preferably 70 to 150 ° C. so that the foamed sheet can be heat-sealed while having strength. This allows the adhesive to be melted by the heat received when passing through the heating zone of the laminating device such as a laminator without sticking to the guide roll due to the heat of the guide roll or the like during in-line work, and sufficient adhesive force can be obtained. To be

The total thickness of the substrate, the pressure-sensitive adhesive layer and the hot-melt type adhesive layer is preferably 1 mm or less. If it exceeds 1 mm, the intermediate joint portion becomes conspicuous, and if another material is laminated on this portion, the thickness of that portion becomes large and rises.

The intermediate tape of the present invention can be used as a conventional pressure-sensitive adhesive tape in a temperature range below the softening point of the hot-melt adhesive layer, but it is laminated to form a thick foam. It is particularly suitable for use in connecting and laminating resin foam sheets. As the material of the foamed sheet, a material made of polyolefin resin, resin such as vinyl chloride, rubber or the like can be used.

The polyolefin resin is a polymer or copolymer of olefinic hydrocarbons, such as low density polyethylene, linear low density polyethylene, polypropylene, polybutene, ethylene-propylene copolymer,
Examples thereof include ethylene-vinyl acetate copolymers, ethylene-ethyl acrylate copolymers, ethylene-acrylic acid amide copolymers, ethylene-methyl acrylate copolymers, and the like, or a mixture of two or more thereof.

To produce the tape for splicing of the present invention, a hot melt type adhesive is extruded in a film form in a predetermined amount using an extruder, or the hot melt adhesive is made into a fibrous form, which is then spider web. A mesh-shaped or non-woven fabric-like material is attached to one surface of the base material by using a pressure-sensitive adhesive or an adhesive, or by heat fusion. next,
For example, the pressure-sensitive adhesive layer separately formed on the surface of the release paper is attached to the other surface of the above base material, and the product is obtained by winding the release paper together with the release paper.

The hot-melt type adhesive is formed by extruding the film once into a film shape or by adhering the mesh-shaped one to a base material as described above, or by laminating directly on the base material surface while melt-extruding. Good. In addition, after the pressure-sensitive adhesive layer provided on the surface of the release paper is attached to the base material together with the release paper, the hot melt adhesive layer may be provided on the other surface of the base material by the above method.

As shown in FIG. 3, for example, the relay tape according to any one of claims 1 to 3 has two foam sheets 22.
And 23 are joined together with the pressure-sensitive adhesive layer 12 of the tape 1a for relaying, from both sides of the butted part where the end faces are butted.
The hot-melt adhesive layer 13a on the other surface of the intermediate tape 1a is melted and heat-fused to the adherend 3 such as an iron plate or wood, and the other parts of the foam sheets 22 and 23 are It can also be stuck and fixed with a pressure sensitive adhesive or a hot melt adhesive.

The above-mentioned tape for splicing can be used even if the foamed sheet is a non-foamed sheet. In the case of the usage as shown in FIG. 3, this tape for splicing is not only for the splicing but for the product. It can be used as a part.

[0028]

The tape for interconnecting the present invention according to claim 1 exhibits sufficient initial adhesive force to the foamed sheet bonded by the pressure-sensitive adhesive layer provided on one surface of the base material, and has the base material. The tensile strength prevents cutting between the joined foam sheets. The hot melt type adhesive layer provided on the other surface of the base material is heat-bonded to the foamed sheet laminated on the layer to firmly bond and laminate.

According to a second aspect of the present invention, there is provided a tape for relaying,
The pressure-sensitive adhesive layer on the front surface and the hot-melt type adhesive layer on the back surface are adhered to each other through a large number of openings communicating with the front and back surfaces of the base material to form a strong laminated structure.

According to a third aspect of the present invention, there is provided an intermediate relay tape,
The pressure-sensitive adhesive layer and the hot-melt adhesive layer are adhered to each other in a large number of openings of the base material to form a strong laminated structure,
Since the hot-melt adhesive layer has a mesh shape, infrared rays, far-infrared rays, hot air and the like are easily transmitted, and the entire inner layer portion thereof is simultaneously activated by receiving heat. Moreover, since such an adhesive layer has a larger surface area than that of the film-shaped one, the heat receiving area is large, and the thermal activation of the entire adhesive layer is performed in an extremely short time. As a result, the production speed of the product can be increased and the product can be efficiently produced.

According to a fourth aspect of the present invention, there is provided a laminated structure of a foam, wherein a hot-melt adhesive for the intermediate tape is applied to at least one surface of a foam sheet joined by using the intermediate tape according to any one of the first to third aspects. Since other foamed sheets or adherends are laminated by utilizing it, the intermediate tape itself has excellent laminating strength when adhered to other foamed sheets or adherends, and there is no swelling on the surface. It can also be a thick foam.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the tape for splicing of the present invention will now be described with reference to the drawings. (Embodiment 1) FIG. 1 is a cross-sectional view showing an embodiment of the tape for splicing of the present invention according to claim 1, wherein one side of a nonwoven fabric 11 made of polyester fiber having a basis weight of 30 g / m ² is a solvent-based two-component Acrylic pressure-sensitive adhesive layer 12 (Sekisui Chemical Co., Ltd. product name: Esdyne # 7853) has a solid content of 120 g / m ^2.
Is coated and dried so that the other surface of the film is hot-melt type film 13 (manufactured by Hirodyne Industry Co., Ltd., trade name: Hirodyne 7550, melt index 38 g / 10 min /
190 ° C, softening point (R & B method) 116 ° C, specific gravity 0.95
0) is provided by extrusion coating at 50 g / m ² and is slit to a width of 50 mm.

Example 2 A non-woven fabric (manufactured by Nisseki Plastic Co., Ltd.) in which fibers formed by dividing a uniaxially stretched high-density polyethylene film as a base material in the stretching direction are cross-bonded in the longitudinal and transverse directions. Product Name: Nisseki Wallif ST
The same pressure-sensitive adhesive layer as that used in Example 1 was provided on one surface having a basis weight of 23 g / m ² and a thickness of 0.13 mm) by a transfer method, and formed on the other surface in a three-dimensional cobweb shape. A polyamide hot melt resin (manufactured by Daicel Corp., product name: Daiamide Span # 1000, basis weight 25 g / m ² ) is laminated on the pressure-sensitive adhesive layer through the gaps between the fibers of the non-woven fabric and slit into a width of 50 mm. (Not shown).

(Example 3) In place of the base non-woven fabric of Example 2, sufu (manufactured by Ando Co., trade name: kansai 60x60,
The same tape as in Example 2 except that a width of 50 mm was used (not shown).

(Embodiment 4) FIG. 2 is a sectional view showing an embodiment of the laminated structure of the foam according to claim 4. The end faces of two crosslinked polyethylene foam sheets 22 and 23, 24 and 25, 26 and 27 having a thickness of 5 mm are butted against each other, and the pressure-sensitive adhesive layer 12 of the intermediate tape of Example 2 is provided on both surfaces of the butted parts. Is adhered, the hot-melt adhesive layer 13 of the intermediate joint portion and the other intermediate foamed foam sheet are heat-sealed, and the outermost layer has a seamless foam sheet 21.
Is heat-sealed to the hot-melt adhesive layer 13, and the overlapping surfaces of the foamed sheets 21 and 22 and 21 and 23 are also heat-sealed and laminated.

The laminated structure of this thick foam 2 has a good appearance because the intermediate joint cannot be seen from the outside and the intermediate joint does not rise, and the overlapping portion of the intermediate tape and the foam sheet does not separate. It had a strong lamination strength.

(Embodiment 5) FIG. 3 is a cross-sectional view showing another embodiment of the laminated structure of the foam according to claim 4, which is a butt portion where the end faces of two foam sheets 22 and 23 are butted. Bonding from both sides with pressure-sensitive adhesive layers 12 and 12 of the tapes 1a and 1b for splicing, the hot-melt adhesive layer 13a on the other surface of the tape 1a for splicing is melted and attached to the wood 3 by heat fusion. It is a thing. The foamed sheets 22 and 23 other than the portion to which the intermediate tape 1a is attached are laminated on the wood 3 with a rubber solvent adhesive. The obtained laminated structure is based on the intermediate tape 1a and the foam sheets 22 and 2.
The entire surface of 3 was firmly adhered to the wood 3.

(Embodiment 6) FIG. 4 is a cross-sectional view showing another embodiment of the laminated structure of the foam according to claim 4, having a thickness of 4 m.
The cross-linking tape 10 of the second embodiment is bonded by the pressure-sensitive adhesive layer 12 to one surface of the abutting portion where the end faces of the two m crosslinked polyethylene foam sheets 41 and 42 are butted against each other. Further, the foamed sheets 41 and 42 which are spliced together are bonded to one side of the folded plate roofing material 5 made of an iron plate by the hot melt adhesive 13 of the splicing tape 10.

The foam sheets 41 and 42 other than the portion where the intermediate tape 10 is attached are adhered to the folding roof material 5 by a rubber hot-melt type adhesive applied in advance. The laminated structure of the foam 4 and the folded sheet roofing material 5 has a good appearance because the splicing tape 10 is not visible from the outside and the splicing portion does not rise, and the adhesion between the splicing tape 10 and the folded sheet roofing material 5 is further improved. Was solid.

(Comparative Example 1) Adhesive tape in which an acrylic pressure-sensitive adhesive layer is provided on one side of kraft paper and the other side is subjected to silicone release treatment (trade name: Sekisui Chemical Co., Ltd .: craft tape # 500, width 50 mm ) Was used (not shown).

(Comparative Example 2) Double-sided pressure-sensitive adhesive tape (manufactured by Sekisui Chemical Co., Ltd .: product name: Double Tack Tape # 57) having a nonwoven fabric as a base material and acrylic adhesive layers provided on both sides.
0, width 50 mm) was used.

Performance Evaluation Workability Two foam sheets (crosslinked polyethylene foam manufactured by Sekisui Chemical Co., Ltd., trade name: Softlon S3005, expansion ratio 3
0 times, thickness 5 mm) Ends are butted and the pressure sensitive adhesive layer of the intermediate transfer tape of Examples 1, 2 and 3 and Comparative Examples 1 and 2 is attached to one surface of the butted part. Examined. (1) The presence or absence of winding around the guide roll of the laminator was observed. (2) The presence or absence of peeling / cutting of the intermediate portion due to the tension of the laminator was observed. (3) A laminate obtained by laminating the hot-melt adhesive surface of the relay tape and the foam sheet at a speed of 10 m / min in a state where the thickness of the heat fusion-bonded portion is 180 ° C. and the thickness is compressed to ½. By using, the presence or absence of opening of the end portions of the foam sheets of the intermediate joint portion, and the heat fusion state of the hot-melt adhesive layer of the intermediate joint tape and the laminated foam sheet were observed.

Tensile Strength Two ends of the foamed sheet of the same crosslinked polyethylene as above are butted against each other, and 50 mm from both sides of this butted part.
Adhesive tape having a width was attached and joined, cut into a strip having a width of 50 mm, and the foamed sheet was pulled by hand from both sides of the joined portion. ◯: The foamed sheet was cut at a portion other than the joint portion Δ: The adhesive tape on one side was peeled off ×: The adhesive tape on both sides was peeled off

Heat fusible property Regarding the one obtained by bonding the hot melt adhesive surface of the intermediate tape to the foam sheet under the condition (3), the bonded surface is slowly peeled by hand to remove the broken state of the foam sheet. Examined. ◯: 50% or more of the bonded area is broken X: Less than 50% of the bonded area is broken Table 1 shows the above results.

[0045]

[Table 1]

As is clear from Table 1, all of the examples are excellent in workability by the laminator and lamination strength with the foamed sheet by the hot melt adhesive. In particular, in the case of Example 2, the heat bonding work between the hot melt adhesive and the non-woven fabric substrate could be performed very quickly in the production. On the other hand, in the case of Comparative Example 1, the back surface of the kraft tape was subjected to silicone release treatment, so that this part could not be heat-sealed with the foamed sheet, resulting in poor stacking. Therefore, it often happened that it was wound around the roll of the laminator and the tension received at that time cuts the intermediate joint.

[0047]

EFFECTS OF THE INVENTION The relay tape of the present invention is constructed as described above, and the relay tape according to claim 1 has a pressure-sensitive adhesive layer provided on one side of the base material for the foam sheet to be joined. The hot-melt adhesive layer provided on the other surface of the base material exhibits a high initial adhesive force and is heat-fused with the foamed sheet laminated on the layer to firmly bond and laminate. Further, the relay portion can be effectively used without being discarded as scrap.

According to the second aspect of the present invention, the pressure-sensitive adhesive layer on the front surface and the hot-melt type adhesive layer on the back surface are adhered to each other at a large number of openings communicating with the front and back of the substrate to make the tape strong. A laminated structure is obtained.

According to the relay tape of claim 3,
At the openings formed between the fibers of the base material, the pressure-sensitive adhesive layer and the hot-melt adhesive layer are adhered to each other to form a strong laminated structure, and the hot-melt adhesive layer has a mesh-like structure. When it receives heat for dressing, it melts quickly, and the product manufacturing speed can be increased, enabling efficient manufacturing. Further, the relay portion can be effectively used without being discarded as scrap.

Further, according to the laminated structure of the foam according to claim 4, a hot-melt type of the relay tape is formed on at least one surface of the foam sheet joined by using the relay tape according to any one of claims 1 to 3. Since other foamed sheets or adherends are laminated by using an adhesive, the intermediate tape itself has excellent laminating strength when adhered to other foamed sheets or adherends, and also on the surface. It can also be a thick foam that does not rise. Further, the intermediate joint portion can be effectively used without being discarded as scrap.

[0051]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a relay tape of the present invention.

FIG. 2 is a cross-sectional view showing an example of a laminated structure of the foam of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the laminated structure of the foam of the present invention.

FIG. 4 is a sectional view showing still another embodiment of the laminated structure of the foam of the present invention.

FIG. 5 is a cross-sectional view showing an example of a conventional intermediate connection state.

FIG. 6 is a cross-sectional view showing another example of a conventional relay state.

FIG. 7 is a cross-sectional view showing still another example of a conventional relay connection state.

[Explanation of symbols]

1, 1a, 1b, 10: Tape for relaying 2: Thick foam sheet 3: Wood 4,6,21,22,23,24: 25,26,27,
41, 42: Foamed sheet 5: Folded plate roofing material 7: Single-sided adhesive tape 8: Heat-sealed part 11: Nonwoven fabric 12: Pressure-sensitive adhesive layer 13, 13a: Hot melt adhesive

Claims (4)

[Claims] 1. A tape for relaying, wherein a pressure-sensitive adhesive layer is provided on one surface of a substrate and a hot-melt type adhesive layer is provided on the other surface. 2. The base material is made of woven cloth or non-woven cloth, and the fibers constituting the base material are arranged at intervals to form a large number of openings communicating with the front and back of the base material. The relay tape according to claim 1, which is characterized in that. 3. A base material by arranging fibers formed by dividing a uniaxially stretched synthetic resin film into a film along the stretching direction in a longitudinal direction and a transverse direction at intervals and joining the intersecting portions of the fibers. The pressure-sensitive adhesive layer is provided on one surface of the non-woven fabric in which a large number of openings communicating with the front and back sides of the non-woven fabric are formed, and a net-like hot-melt adhesive layer is provided on the other surface of the non-woven fabric. An adhesive tape, wherein the adhesive layer and the pressure-sensitive adhesive layer are adhered to each other at the openings formed between the fibers of the non-woven fabric. 4. The pressure-sensitive adhesive layer of the intermediate tape according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive layer is bonded to at least one surface of a butt portion formed by abutting end surfaces of two synthetic resin foam sheets. And a foamed sheet or an adherend is adhered to the hot-melt adhesive layer of the above-mentioned tape for relaying.