JP5255871B2 - Peelable adhesive tape - Google Patents

Description

  The present invention relates to a peelable pressure-sensitive adhesive tape in which a tape base material having rubber elasticity is stretched by applying a tensile load and peeled off from a surface to be applied, and more specifically, peeling that can be peeled off more safely. It relates to possible adhesive tapes.

  There is an adhesive tape (stretchable release tape) that can be peeled off as one of the attaching methods without damaging the wall surface like a thumbtack when attaching a poster. For example, as shown in Patent Document 1, a peelable pressure-sensitive adhesive tape is made of a pressure-sensitive adhesive tape in which a pressure-sensitive adhesive is applied to the surface of a tape base material made of foamed resin or a rubber-based highly elastic sheet, and is interposed between a wall surface and a poster. Used.

  When removing this type of adhesive tape, the gripping area provided at the end of the tape is grasped by hand and pulled outward, so that the adhesive area gradually increases as the tape base material extends and deforms. Decreases and finally peels off the wall. According to this, not only the adhesive residue on the wall surface can be removed cleanly, but also the used tape can be easily collected.

JP 2004-339353 A

However, the conventional peelable adhesive tape has the following problems. That is, since the conventional peelable adhesive tape has a grip portion only at one end in the extending direction of the adhesive tape, when the grip portion is gripped and pulled, the fixed end side without the grip portion is finally peeled off. At the same time, it sometimes flew toward the grip portion due to elastic restoring force.

In particular, the fixing means such as hooks, in the case of using the peelable adhesive tape of this type, during removal, with momentum peelable adhesive tape is peeled off, such as hard base plate for mounting the hook Sometimes it flew toward the finger and could hurt the finger.

  Therefore, the present invention has been made to solve the above-mentioned problems, and its purpose is to prevent the tape from flying toward the finger when it is peeled off, and can be removed safely. Is to provide an adhesive tape.

In order to achieve the above-described object, the present invention has several features described below. The invention according to claim 1 pulls I Oh with adhesive tape obtained by forming an adhesive layer on one side or both sides of the tape base, to the adhesive tape by applying a tensile load its pulling direction with elasticity In the peelable pressure-sensitive adhesive tape that is extended and peeled off from the surface to be bonded, both ends of the pressure-sensitive adhesive tape in the stretching direction are gripped by a hand when being peeled , and each has a gripping portion to which a tensile load is applied in the direction of separation. The tape base material is provided with a slit between each of the gripping portions, starting from one side perpendicular to the stretching direction of the adhesive tape and ending at the other side. The adhesive tape is provided and is divided into two through the slit when the tape base material is stretched through the grip portion .

The invention according to claim 2 is characterized in that, in the above-mentioned claim 1, the slit has a linear shape inclined at a predetermined angle with respect to the extending direction.

The invention according to claim 3 is characterized in that, in the above-mentioned claim 1, the slit is provided with at least one bent portion between the start end and the end.

The invention according to claim 4 is an adhesive tape in which an adhesive layer is formed on one or both sides of an elastic tape base material, and the adhesive tape is stretched in the tensile direction by applying a tensile load. In the peelable adhesive tape that is peeled off from the adherend surface, gripping portions are provided at both ends in the stretching direction of the adhesive tape so as to be gripped by a hand when being peeled and to be applied with a tensile load in the direction of separation. In addition, the tape base material includes a first slit between one of the sides perpendicular to the extending direction of the adhesive tape and the other side of the adhesive tape, and the adhesive tape. a second slit directed lateral sides from the other sides perpendicular to the extending direction of the one of which is formed alternately at one side edge and the other side of said at predetermined intervals, the adhesive -Loop, by the tape base material through the grasping portion is stretched, is characterized by being stretched in a zigzag through the first slit and the second slit.

  The invention according to claim 5 is the above-mentioned claim 4, when the length of the first slit is L1, the length of the second slit is L2, and the length of the adhesive tape in the width direction is W. The length L1 of the first slit is L1> W / 2, and the length L2 of the second slit is L2> W / 2.

According to the first aspect of the present invention, the gripping portions are provided at both ends in the stretching direction, and further provided with slits that divide the adhesive tape in the stretching direction between the gripping portions, without changing the holding force, It can be easily peeled off with a small force.

In addition , the slit is formed so that one side that is orthogonal to the direction of stretching of the adhesive tape starts and the other side ends. The adhesive tape separates along the slit and can be peeled off with a smaller force. Further, since the tape is divided along the slit, the end of the tape does not fly to the finger.

According to the second and third aspects of the present invention, the stretching force can be effectively concentrated on the slit by forming the slit into an oblique linear shape or providing at least one bent portion. Can be peeled off.

According to invention of Claim 4, a slit is the 1st slit which goes to the other side side from one side orthogonal to the extending direction of the adhesive tape, and the other orthogonal to the extending direction of the adhesive tape. Since the first slit and the second slit are alternately formed on both sides with a predetermined interval, the gripping portions at both ends are formed. By pulling, the stretching force propagates in order from the slit on the gripping part side to the inner slit, so that it can be peeled off with a small force.

According to the fifth aspect of the present invention, when the length of the first slit is L1, the length of the second slit is L2, and the length in the width direction of the adhesive tape is W, the length L1 of the first slit. Is L1> W / 2, and the length L2 of the second slit is L2> W / 2, so that the end portion of the first slit and the end portion of the second slit overlap each other. When this occurs, the stretching force propagates alternately to the first slit and the second slit.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a peelable pressure-sensitive adhesive tape according to an embodiment of the present invention, FIG. 2 is a central longitudinal sectional view of the peelable pressure-sensitive adhesive tape, and FIG. 3 is a peelable pressure-sensitive adhesive tape. FIG.

  As shown in FIG. 1, this peelable pressure-sensitive adhesive tape 1 is composed of a double-sided pressure-sensitive adhesive tape in which pressure-sensitive adhesive layers 3 and 3 are formed on both surfaces of a tape base material 2 having an appropriate rubber elasticity, and its stretching direction (longitudinal) At both ends of (direction), grip portions 4 and 4 that are gripped by hands are provided.

  In addition, although the separator (not shown) which protects the adhesive layers 3 and 3 is provided in both surfaces of the peelable adhesive tape 1, in this invention, since the structure of a separator may be arbitrary, the illustration The description is omitted.

  The tape base material 2 is preferably a synthetic resin that is easily stretched and peeled and has appropriate rubber elasticity. In this example, the tape base material 2 is composed of a foamed sheet of a crosslinked polyolefin resin crosslinked with a metallocene catalyst. The material may be arbitrarily selected according to the specification as long as it has appropriate rubber elasticity having releasability. The configuration of the foam sheet may be either open cells or closed cells.

  In this example, the tape base material 2 is formed by forming both ends of a rectangular sheet having a predetermined thickness into a semicircular convex shape, but the shape of the tape base material 2 is arbitrary such as a rectangular shape, an elliptical shape, a triangular shape, etc. It is.

  The pressure-sensitive adhesive layers 3 and 3 are highly retainable, and are coated with a pressure-sensitive adhesive that can be synchronized with the cross-linked polyolefin resin of the tape substrate 2. In this example, the pressure-sensitive adhesive is formed by uniformly applying a SBS block copolymer polymer directly on the surface of the tape base 2 with a predetermined thickness. In this example, the pressure-sensitive adhesive layers 3 and 3 are formed to have a thickness of 0.1 mm.

  In this example, the PSA is based on an SBS block copolymer polymer, and an adhesive component such as α-pinene resin or C5C9 petroleum resin, naphthenic oil or the like is added to the matrix, and an antioxidant or ultraviolet absorber. Various additives such as are blended.

  More preferably, an isocyanate resin is further added to the pressure-sensitive adhesive. According to this, since it is strongly associated with the surface treatment of the tape substrate, the interfacial strength is further increased and the anchoring property can be improved.

  More preferably, the adhesive contains a predetermined amount of silica beads. In this example, since the pressure-sensitive adhesive is solvent-based, silica beads having solvent resistance are used. Of these, hydrophobic silica beads are more preferable because they have good dispersibility in the solvent-based pressure-sensitive adhesive material.

The gripping portions 4 and 4 are made by bonding non-adhesive synthetic resin films to both ends of the tape substrate 2 in the extending direction, and are formed symmetrically with each other. In this example, the grip portions 4 is made of those formed by bonding a polyester film on the surface of the pressure-sensitive adhesive layers 3, 3 may be a non-tacky to manually grasped, for example, the tape substrate 2 You may form without apply | coating the adhesive layers 3 and 3 to both ends .

  As shown in FIGS. 1 and 3 (a1) again, the tape base material 2 is provided with slits 5 for dividing the adhesive tape along the stretching direction when the adhesive tape is removed. The slit 5 is provided obliquely with respect to the extending direction from one end to the other end in the width direction of the tape substrate 2.

  The slit 5 consists of a through groove penetrating in the thickness direction of the tape base material 2, but the tape base 2 and the adhesive layers 3, 3 are not used and are attached to the wall surface when the tape base is used. The material 2 is not separated.

  According to this, since the tape base material 2 is not separated from the slit 5 at the time of sticking to the wall surface, the sticking method and the feeling of use (such as load resistance) of the peelable adhesive tape 1 are slit. There is no particular difference from the type without.

  When peeling off, as shown in FIG. 3 (a2), the grip portions 4 and 4 are gripped by hand and pulled in a direction to separate them from each other. Is concentrated on the slit 5 and the tape base material 2 is gradually separated from both ends (side edges) of the slit 5, and finally the tape base material 2 is separated into two parts and peeled off. Can do. Furthermore, the cut tape end portion does not fly toward the finger.

  In this example, the slit 5 is formed obliquely from one end to the other end in the width direction. In addition, as shown in FIGS. 3 (b1) and 3 (b2), the slit 5 is provided between the start end and the end end of the slit 5. The bent portion 51 may be provided and the slit 5 may be bent (in this example, V-shaped).

  According to this, the time until peeling can be shortened, and the peeling force can be further reduced and peeling can be easily performed. In this example, the slit 5 has a bent portion 51 formed in a single V shape, but may be formed in a W shape by providing a plurality of bent portions 51, and further, a bent portion. 51 may be curved to form a U-shape. Such an embodiment is also included in the present invention.

  As yet another aspect, as shown in FIG. 3 (c1), the slit 6 has a first slit 6a formed from one end portion (left end portion in this example) in the width direction of the tape base material 2 toward the center. And the 2nd slit 6b formed toward the center from the other edge part (right edge part in this example) may be alternately formed along the longitudinal direction (stretching direction) of the tape base material 2.

  When the length of the first slit is L1, the length of the second slit is L2, and the length in the width direction of the adhesive tape is W, the length L1 of the first slit is L1> W / 2. The slit length L2 is preferably L2> W / 2.

  According to this, as shown in FIG. 3 (c2), since the end of the first slit 6a and the end of the second slit 6b overlap each other, the gripping portions 4 and 4 are gripped by hand, When it is pulled to the center, it is gradually extended from both ends toward the center while alternately propagating to the first slit 6a and the second slit 6b, and can be peeled off with a small force.

  It should be noted that this type of double-tab-type peelable adhesive tape provided with two gripping portions 4 and 4 is fixed so that each gripping portion 4 and 4 protrudes from a part of the attached object at the time of removal. Thus, it is easy to grip the grip portions 4 and 4 at the time of removal.

Various modifications are also included in the present invention as long as the adhesive tape 1 can be peeled off and has grips 4 and 4 at both ends, and the grips 4 and 4 are separated and removed from each other. It is.

  In this example, the slit 5 is composed of continuous cuts, but may be cuts formed intermittently, such as perforations, and a part of the tape base material 2 is divided and separated in a stretched state. If it is such a weak part, the shape of the slit 5 can be arbitrarily changed according to a specification.

The perspective view of the adhesive tape which can peel according to one Embodiment of this invention. The side view of the adhesive tape which can peel the same. The front view of the Example and various modifications of the peelable adhesive tape of this invention, and the schematic diagram of the extended state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adhesive tape which can be peeled 2 Tape base material 3 Adhesive layer 4 Grip part 5 Slit W Wall surface

Claims (5)

I Oh adhesive tape comprising an adhesive layer formed on one side or both sides of the tape base material having elasticity, the adhesive tape by applying a tensile load is stretched in its tensile direction peeled from the attachment surface In the peelable adhesive tape
At both ends of the adhesive tape in the stretching direction, gripping portions are provided that are gripped by hand when being peeled off and can be applied with a tensile load in a direction away from each other,
The tape base material is provided with a slit between each gripping part, starting from one side perpendicular to the stretching direction of the adhesive tape and ending at the other side,
The said adhesive tape is divided into two through the said slit, when the said tape base material is extended through the said holding part, The peelable adhesive tape characterized by the above-mentioned . The slit is peelable pressure-sensitive adhesive tape according to claim 1, characterized in that to the upper Symbol stretching direction is a predetermined angle inclined straight. The slit is peelable pressure-sensitive adhesive tape according to claim 1, characterized in that the bent portion of the at least one location is provided between the beginning and the end. An adhesive tape in which an adhesive layer is formed on one or both sides of an elastic tape base material, and when the tensile load is applied, the adhesive tape is stretched in the tensile direction and peeled off from the adherend surface. In the peelable adhesive tape
At both ends of the adhesive tape in the stretching direction, gripping portions are provided that are gripped by hand when being peeled off and can be applied with a tensile load in a direction away from each other,
In the tape base material, between each gripping part, a first slit heading from one side perpendicular to the stretching direction of the adhesive tape to the other side, and perpendicular to the stretching direction of the adhesive tape a second slit toward the other one side edge side of the side of the can are formed alternately on one side edge and the other side of the at a predetermined interval,
The adhesive tape is stretched in a zigzag manner through the first slit and the second slit when the tape base material is stretched through the grip portion, and is a peelable adhesive tape characterized by .   When the length of the first slit is L1, the length of the second slit is L2, and the length in the width direction of the adhesive tape is W, the length L1 of the first slit is L1> W / 2. 5. The peelable adhesive tape according to claim 4, wherein the length L2 of the second slit is L2> W / 2.

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