JP2001181584A - Double-sided adhesive tape and method for producing the same - Google Patents

Abstract

(57) [Problem] To provide a double-sided adhesive tape having both the advantages of a substrate-less type and a general type and having no release paper to be discarded after use. SOLUTION: A base material (10) serving as a core of a tape, an adhesive layer (3) in contact with the base material, and a release agent layer (1a, 1b, 1c, 1d, 1e, 2a, 2b, 2c,
2d, 2e), and the contact surfaces of the pressure-sensitive adhesive layer and the release agent layer are alternately arranged on the substrate surface so as to form vertical stripes along the longitudinal direction, and face the pressure-sensitive adhesive layer contact surface on one surface. The other surface has a release agent layer contact surface, and the other surface has a pressure-sensitive adhesive layer contact surface facing the release agent layer contact surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided adhesive tape, and more particularly to a double-sided adhesive tape that does not use a release paper wound in a roll shape and a method of manufacturing the same.

[0002]

2. Description of the Related Art For example, a double-sided adhesive tape used for laminating two sheets of paper at a processing site of a factory generally has a structure in which only an adhesive is sandwiched between release papers. "Less type" or "general type" in which an adhesive is provided on both sides of a thin supporting substrate. FIG. 7 is a cross-sectional view of a double-sided adhesive tape of a substrate-less type cut along a plane perpendicular to the longitudinal direction. FIG. 8 is a cross-sectional view of a general type double-sided adhesive tape cut along a plane perpendicular to the longitudinal direction.

The substrate-less type shown in FIG. 7 is different from the general type shown in FIG. 8 in that the supporting substrate 5 is not inserted between the two adhesive layers 4 and 4. In the substrate-less type, for example, a pressure-sensitive adhesive 4 is applied to one of the release agents 6a using a converter or the like.
Release agent 7a provided on release paper 6 coated with
Is applied to the pressure-sensitive adhesive layer 4. In this case, there is no significant difference from general label production, and the production itself is easy. However, in any of the above-mentioned types, waste paper increases because two sheets of release paper 6 and 7 are discarded.

Therefore, in order to reduce costs, a double-sided adhesive tape of a type called a separatorless (non-separator, linerless, etc.) which does not require a release paper has come to be used. Of these, the substrate-less type must be manufactured so that the adhesive strength between each release paper and the adhesive is provided so that the adhesive remains on one release paper. Although the force design is important, it is only necessary to make the roll such that the one with the lighter peeling force is outside the winding, and there is relatively little problem in the manufacturing.

[0005]

The conventional substrate-less type is a so-called "solid glue" because only the pressure-sensitive adhesive serves as a double-sided tape. It is often used because it can be easily dried during production. In addition, although there is an advantage that the cost can be reduced because there is no supporting base material, there are disadvantages that it is difficult to peel off after sticking, and that sticking itself is difficult due to easy deformation.

[0006] In other general types, similarly, an adhesive is applied to a release paper to make the base material to be attached thin, and once wound up to form a roll, and the adhesive is similarly applied to the release paper in the next step. It is made by applying and pasting the rolls. Non-separator and linerless can also be manufactured in a general type in the same manner as described above.

[0007] Since the general type is closer to the "double-sided tape" in the original sense than the substrateless type, if the supporting substrate is selected, it can be replaced even if the adhesive strength is strong.
It has the advantage of being applicable to various adherends, but on the other hand, although thin, there is a supporting substrate coated on both sides with an adhesive, so there is a disadvantage that it wastes a lot in terms of resource saving and cost There is.

[0008] Since these double-sided adhesive tapes all use release paper, the release paper remains as dust after sticking. Even if it is a non-separator, the dust after use is not eliminated only by halving. The object of the present invention is to solve such a problem and eliminate the disadvantage that dust (discarded release paper that is discarded) after pasting, which is common to the conventional example, is eliminated. And a method for producing the same.

[0009]

The present invention solves the above-mentioned problems by the following means. In addition,
In order to facilitate understanding, description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto. That is, the invention of claim 1 is a double-sided adhesive tape wound in a roll shape, wherein the base material (1
0), an adhesive layer (3) arranged in contact with the substrate (10), and a release agent layer (1a, 1b, 1c, 1d, 1e, 2a, 2b,
2c, 2d, 2e), the contact surface of the pressure-sensitive adhesive layer (3) with the substrate (10) and the release agent layer (1a, 1b,
1c, 1d, 1e, 2a, 2b, 2c, 2d, 2e) are alternately arranged so that the contact surfaces of the base material (10) with the base material (10) form vertical stripes along the longitudinal direction of the tape. There is a release agent layer contact surface on the other surface at a position facing the pressure-sensitive adhesive layer contact surface on one surface, and the other surface at a position facing the release agent layer contact surface on one surface of the base material (10). Characterized in that the double-sided adhesive tape has an adhesive layer contact surface.

According to a second aspect of the present invention, in the double-sided adhesive tape according to the first aspect, the width of the contact surface of the pressure-sensitive adhesive layer is larger than the width of the contact surface of the release agent layer opposed across the base material (10). A double-sided adhesive tape characterized by being substantially equal or less.

[0011] The invention of claim 3 is claim 1 or claim 2.
In the double-sided adhesive tape described in 1 above, adhesion between a base material (10) of the tape wound adjacently inside and outside and a release agent layer (eg 11a) inside and an adhesive layer (eg 13a) outside are arranged. (13a) between the pressure-sensitive adhesive layer (for example, 14a) and the pressure-sensitive adhesive layer (for example, 14a) at the portion where the pressure-sensitive adhesive layer (for example, 14a) is disposed inside and the release agent layer (for example, 12a) is disposed on the outside.
And 14a, 14a and 13b, 13b and 14b, 14b and 13c, 13c and 14c, 14c and 13d, 13d and 1
4d, 14d and 13e, and between 13e and 14e), separation bands (s, s) for facilitating separation between the pressure-sensitive adhesive layers.
.. S) are provided.

[0012] The invention of claim 4 provides a substrate (1) having no releasability.
On one surface of the base material (1), a release agent is applied at predetermined intervals so as to form vertical stripes along the longitudinal direction of the tape.
0) On the other surface, a release agent is applied to a portion of the one surface opposite to the portion where the release agent is not applied, and then an adhesive is applied to substantially one of the entire surfaces and wound into a roll. This is a method for producing a double-sided adhesive tape.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, a double-sided adhesive tape (hereinafter, referred to as a tape) without using a release paper according to the present invention will be described below.
Will be described in more detail with reference to the drawings and the like. FIG.
It is an explanatory view showing the structure of one embodiment of the present invention. In FIG. 1, a vertical plane including the tape winding axis (for example, FIG. 2)
FIG. 3 is a cross-sectional view showing an upper half of a section taken along a plane including the yz axes of FIG. However, it is shown in a state of use in which at least one or more outer windings of the tape are fed out. FIG.
FIG. 2 is a perspective view showing the embodiment of FIG. 1 in a state similar to FIG. 1. FIG. 3 is an enlarged plan view showing an end portion of the embodiment of FIG.

The double-sided tape of this embodiment is made of a base material 10
And release agent layers 1 (1a, 1b, 1c, 1d, 1e), 2
(2a, 2b, 2c, 2d, 2e) and an adhesive layer 3 and the like. The base material 10 serves as a support base material for the tape. Paper such as high-quality paper, coated paper, synthetic paper, or paper laminated with a resin film is preferably used, but cellophane, stretched polypropylene, polyethylene terephthalate, etc. Or a resin film of stretched polystyrene, polyvinyl chloride, or the like. Usually, the thickness of the substrate 10 is preferably about 20 to 200 μm.

The release agent layers 1 and 2 are composed of a pressure-sensitive adhesive layer 3 and a base material 10.
It is a layer that can be peeled off from. These release agent layers 1 and 2
The base material 10 is made of U containing silicone acrylate as a main component.
V-cured resin or silicone-based release agent, polybutadiene-based release agent, styrene-butadiene copolymer-based release agent,
A resin containing an alkyd-silicone copolymer-based release agent or the like is formed to a thickness of about 1.5 to 15 μm by offset printing, letterpress printing, or by coating.

The pressure-sensitive adhesive layer 3 is a layer for attaching the tape to an adherend. The adhesive layer 3 is preferably made of an acrylic adhesive, a natural rubber adhesive, a synthetic rubber adhesive, a silicone rubber adhesive, or the like. The coating amount and coating thickness of the pressure-sensitive adhesive layer 3 are not particularly limited, but are preferably
The coating amount is 0.1 to 50 g / m ² and the coating thickness is 0.1
５０50 μm. It is preferable that the pressure-sensitive adhesive does not use water as a main solvent.

As shown in FIG. 1 to FIG.
Stripe release agent layers 1a, 1b, 1c, 1d, 1e having a predetermined width are formed on one surface of the substrate 10 having substantially no releasability so as to form vertical stripes along the longitudinal direction of the tape. The release agent layers 2a, 2b, 2c, 2d, and 2e are provided on the other surface of the base material 10 on the other surface where there is no release agent layer,
The adhesive is applied to substantially the entire surface on one of the surfaces, and then wound into a roll. Before and after that, if necessary, the final shape of the tape may be finished to a narrow width with a slitter or the like.

FIG. 4 shows the roll produced by this method when the adhesive-coated surface is wound inward. FIG.
FIG. 2 is a sectional view showing only the upper side of the winding core of such a roll according to FIG. 1. In the case of FIG. 4, one round from the first part where the tape is peeled is not double-sided tape. Conversely, if the adhesive-coated surface is wound outside, it is not shown. Does not become double-sided tape.

Since the pressure-sensitive adhesive layer 3 is thin, it is deformed by winding up, regardless of whether it is applied to the front surface or the back surface.
Since each release agent layer is actually extremely thin, it is filled in the gap between the substrates 10 facing each other inside and outside the overlapped tape, as shown in FIG. Thus, the release agent layers 1a, 1b, 1
c, 1d, 1e and release agent layers 2a, 2b, 2c, 2d, 2
Since the positional relationship of e is shifted so as not to oppose each other when wound in a roll shape, the release agent layers 1a, 2a, 1b, 2
b, 1c, 2c, 1d, 2d, 1e, 2e are pressure-sensitive adhesive layers 3
The shape is arranged in a zigzag with the intervening.

FIG. 5 shows a state in which the end of the tape is peeled off from the state shown in FIG.
It is sectional drawing shown with the roll-shaped part (part separated in the lower part in the figure) still wound. The length L ₃ of the portion (the portion shown by the dotted line in FIGS. 4 and 5) that the pressure-sensitive adhesive layer 3 has sufficient adhesion to the base material and should be separated by peeling is determined by the pressure-sensitive adhesive layer 3 if the cross-section of sufficiently small than the length L ₄ which is in contact to the substrate 10, only peeling off the tape from the end, the shown by the dotted line portion is pulled apart easily. Actually, the release agent layer is extremely thin, and the thickness of the pressure-sensitive adhesive layer 3 is larger than that of the release agent layer. However, the tape is sufficiently thin so that the tape can be easily peeled off and cleanly peeled off.

The separated pressure-sensitive adhesive layer is divided into a separated substrate side and a rolled-up substrate side, and separate pressure-sensitive adhesive layers 3a, 3b, 3c, 3d, 3e, and a pressure-sensitive adhesive layer 4a,
4b, 4c, 4d, and 4e. In addition, in the case of FIG. 1 to FIG. 5, the width of the release agent layer and the pressure-sensitive adhesive layer are equal except for both side ends, and both side ends are set to １ ／ of the width. If the width is larger than the pressure-sensitive adhesive layer, the resistance (mainly, the force for separating the pressure-sensitive adhesive layer) when the film is unwound from the roll can be reduced. However, if the difference between the widths is too large, the area occupied by the pressure-sensitive adhesive layer with respect to the whole becomes small, and the adhesive strength of the tape becomes weak.

If the tape manufactured in the state shown in FIG. 1 cannot be torn cleanly at the portion where the adhesive layer 3 is to be separated, a separation band may be provided at an appropriate position in the adhesive layer 3. . FIG. 6 is a cross-sectional view showing such an embodiment according to FIG. As shown in FIG. 6, the pressure-sensitive adhesive layers 13a, 14a, 13b, 14b,... 13 between the base materials 10 facing each other inside and outside of the wound tape.
The separation bands s, s... s provided on the e and 14e are arranged at the boundaries between all the contact surfaces of the release agent layer and the contact surfaces of the pressure-sensitive adhesive layers along the stripe pattern of the tape.

The tape can be finished in the same manner as in the embodiment shown in FIGS. 1 and 2 except that a strip-shaped release agent layer 11 having a predetermined width is formed on one surface of the base material 10.
a, 11b, 11c, 11d, 11e,
In the other side of the base material, the base 1
The release agent layers 12a, 12b, 12c, 12d, and 12e are provided so that the portions facing each other with 0
Thereafter, the pressure-sensitive adhesive layers 13a, 13
13e, 14e may be divided by separation bands s, s,... S along the vertical stripes so as to facilitate separation.

The individual pressure-sensitive adhesive layers 13a, 14a, 13b, 14b, 13c, 14 divided by the separation bands s, s,.
After applying c, 13d, 14d, 13e, and 14e to one of the surfaces of the base material 10, the base material 10 is wound into a roll, and when the tape is peeled off, the pressure-sensitive adhesive layers 13a, 1
3b, 13c, 13d, and 13e are inside the base material 10,
The adhesive layers 14a, 14b, 14c, 14d, 14e
It adheres to the outside of the substrate 10.

According to this embodiment, even when the tape is wound, the pressure-sensitive adhesive layers are sufficiently separated by the separation bands s, s... S, so that the separation bands are not filled by the winding pressure. , To facilitate the feeding of the tape.

(Other Embodiments) The present invention is not limited to the above-described embodiments, and various modifications or changes are possible, and these are also within the equivalent scope of the present invention. (1) For example, for storage of a tape wound in a roll shape, terminal treatment at the beginning and end of winding may be appropriately performed, or a core and an outer protective tape may be added.

(2) Further, the separation zone for separating the adjacent pressure-sensitive adhesive layers between the base materials is not a gap,
It may be filled with a suitable filler. In that case, when the pressure-sensitive adhesive layer is applied to one or the other surface of the base material by printing, at the same time, an appropriate sealing agent may be buried by being imprinted at a position corresponding to the separation band. .

This filler can be formed by printing or coating a UV ink or a synthetic resin such as a vinyl acetate resin, an acrylic resin, or a polyurethane resin. The thickness of the separation zone in this case is not particularly limited, but is usually 3 to 20 μm, preferably 5 to 10 μm.
It is about.

[0029]

As described above, according to the present invention,
There are various effects as follows. (1) The contact surfaces of the pressure-sensitive adhesive layer and the release agent layer that are arranged in contact with the base material are alternately arranged so as to form vertical stripes along the longitudinal direction of the base material. Since the agent layer contact surface is arranged so as to face the other release agent layer contact surface, it is possible to obtain a double-sided adhesive tape having no discarded portion such as release paper simply by sequentially peeling off from the roll wound with the tape. .

(2) By setting the width of the contact surface of the pressure-sensitive adhesive layer to be approximately equal to or less than the width of the contact surface of the release agent layer opposite to the substrate, as described above,
When the tape is sequentially peeled off from the roll, it can be neatly peeled off without resistance.

(3) It is easy to separate adjacent pressure-sensitive adhesive layers between the release agent layer and the pressure-sensitive adhesive layer disposed adjacent to each of the front and back surfaces of the base material with the double-sided adhesive tape wound up. Is provided, the above-described peeling is more easily performed, and the above-described effect can be more reliably exerted.

(4) On one surface of the non-peelable substrate,
A release agent is applied at intervals of a predetermined width so as to form a vertical stripe pattern along the longitudinal direction of the base material, and the other surface of the base material is peeled to a portion of the one surface opposite to the portion where the release agent is not applied. A double-sided adhesive tape of the present invention can be easily and specifically manufactured by applying a pressure-sensitive adhesive, applying an adhesive on substantially one of the surfaces, and winding the resultant into a roll.

[Brief description of the drawings]

FIG. 1 is an explanatory view (cross-sectional view) illustrating a structure according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the embodiment of FIG. 1 in use.

FIG. 3 is an enlarged plan view showing an end of the embodiment of FIG. 1;

FIG. 4 is a cross-sectional view showing a case where the pressure-sensitive adhesive applied surface is wound inward according to FIG.

FIG. 5 is a sectional view showing a state in which an end of the tape is peeled off from the state of FIG. 1;

FIG. 6 is a cross-sectional view showing an embodiment in which a separation band is provided on an adhesive layer.

FIG. 7 is a cross-sectional view showing an example of a conventional substrate-less type double-sided adhesive tape.

FIG. 8 is a sectional view showing an example of a conventional general type double-sided adhesive tape.

[Explanation of symbols]

1a, 1b, 1c, 1d, 1e, 2a, 2b, 2c, 2
d, 2e, 11a, 11b, 11c, 11d, 11e,
12a, 12b, 12c, 12d, 12e Release agent layer 3, 4, 13 Adhesive layer 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3
i, 3j, 13a, 13b, 13c, 13d, 13e,
13f, 13g, 13h, 13i, 13j Independent adhesive layer 5 Supporting base material 6, 7 Release paper 10 Base material s Separator

Claims (4)

[Claims] 1. A double-sided adhesive tape wound in a roll, comprising: a base material serving as a core of the tape; an adhesive layer arranged in contact with the base material; And a contact surface of the pressure-sensitive adhesive layer to the base material and a contact surface of the release agent layer to the base material are alternately arranged so as to form vertical stripes along the longitudinal direction of the tape, There is a release agent layer contact surface on the other surface at a position facing the pressure-sensitive adhesive layer contact surface on one surface of the substrate, and the other surface at a position facing the release agent layer contact surface on one surface of the substrate. A double-sided adhesive tape characterized by having an adhesive layer contact surface. 2. The double-sided adhesive tape according to claim 1, wherein the width of the pressure-sensitive adhesive layer contact surface is substantially equal to or less than the width of the release agent layer contact surface opposed to the substrate. A double-sided adhesive tape, characterized in that: 3. The double-sided adhesive tape according to claim 1, wherein a release agent layer is disposed inside and a pressure-sensitive adhesive layer is disposed outside between the base materials of the tape wound adjacently inside and outside. Between the pressure-sensitive adhesive layer and the pressure-sensitive adhesive layer in which the pressure-sensitive adhesive layer is disposed inside and the release agent layer is disposed outside, a separation band is provided to facilitate separation between the pressure-sensitive adhesive layers. And double-sided adhesive tape. 4. A release agent is applied to one surface of a non-peelable base material at a predetermined width interval so as to form vertical stripes along the longitudinal direction of the tape. A double-sided adhesive tape characterized in that after applying a release agent to a portion of the surface opposite to the portion where the release agent is not applied, an adhesive is applied to substantially one of the entire surfaces and wound into a roll. Production method.