JPH0676113U - Plastic tape - Google Patents

Abstract

(57) [Summary] [Object] To provide a multipurpose tape which has appropriate rigidity, flexibility and toughness, and is easily bent or curved to be attached to an adherend. [Structure] The plastic 10 is provided with a kerf 14 extending in a predetermined direction on one surface 13 orthogonal to the thickness direction of a band-shaped body 12 made of polyolefin foamed plastic as a base material.
It is a plastic tape having an adhesive layer 16 formed on the surface 15 opposite to the one surface. At the time of use, the cut groove is directed outward, and the band-shaped body is bent so as to form a surface intersecting the cut groove, and the band-shaped body is attached to the adherend.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a plastic tape, and more particularly to an adhesive plastic tape which has appropriate rigidity, flexibility and toughness and is lightweight and versatile. The plastic tape according to the present invention can be used for various purposes, and in particular, it is attached to a bent part of a box wall such as a corrugated box or a plastic box to reinforce or repair the strength of the box. It is a convenient tape to use.

[0002]

[Prior art]

 Although various types of adhesive tapes have been commercially available, most tapes have an adhesive layer formed on a band-shaped body made of thin paper, fiber cloth, or plastic film. It was done.

[0003]

[Problems to be solved by the device]

 These conventional tapes have inherent weaknesses in strength, such as almost no rigidity, easy tearing, and easy abrasion due to low abrasion resistance, due to the material of the strip used. Therefore, when the conventional tape is attached to the adherend to repair or reinforce the adherend, it is necessary to stack the tape in multiple layers. I was dissatisfied with the fact that the strength of the adherend did not increase as expected, despite the reinforcement. In addition, since the tape is thin, it adheres to a place other than the desired place or has a wavy shape, resulting in a poor appearance and difficulty in sticking.

The problems of the conventional tape will be described below by taking a box such as a cardboard box as an example. The corrugated ball box or the plastic box is light and easy to handle, but has a drawback that it does not have sufficient strength and is easily crushed or broken. Therefore, when stacking boxes on top of each other or stacking other objects on top of the boxes, tape should be attached to the corners and box wall folds to reinforce the strength. There is a need. Also, since the bent part of the box wall frequently comes into contact with or collides with other objects, it is easily damaged and often breaks or frays. Often repaired.

However, the conventional reinforcement or repair with an adhesive tape cannot provide satisfactory reinforcement and repair results because the strength of the tape is basically insufficient. In addition, it was difficult to apply a tape that looked good, and it was often clunky. The above description has been made by taking the case of reinforcing and repairing the bent portion of the box wall of the box as an example. However, not only as an adhesive tape for reinforcement or repair, it also has appropriate rigidity, flexibility and toughness. There has been a demand for an adhesive tape that can be easily bent or bent and can be used for various purposes. Among various uses, there are also uses such as sticking to the surface according to the shape of an object as a guide plate, reinforcing the cutting edge of corrugated cardboard or thin plywood, and curing. .

In view of the above circumstances, an object of the present invention is to provide a multipurpose object which has appropriate rigidity, flexibility and toughness, and which can be easily bent or curved to be attached to an adherend. It is to provide an adhesive tape.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, a plastic tape according to the present invention is provided with a kerf on one surface orthogonal to the thickness direction of a plastic-based strip, and on the surface opposite to the one surface. A plastic tape with an adhesive layer formed on top of it, with the kerf facing outwards and the band-shaped body folded to form a surface that intersects with the kerf and attached to the adherend. It is characterized by having done.

The plastic tape according to the present invention can be used in various applications by bending a band-shaped body provided with an adhesive layer and adhering it to an adherend. For example, a cardboard box Or it is the best tape to repair and reinforce the bent part of the box wall of the plastic box.

In the present invention, various plastics can be used as the base material. The thickness of the strip can be determined according to the usage of the plastic tape, taking into account the required mechanical strength and the depth of the kerf, but it is generally 0.1 to 5.0 mm. It The shape of the kerf is not particularly limited, and various shapes such as a kerf cut with a sharp thin blade, a V-shaped kerf, and a U-shaped kerf can be adopted. The direction and spacing of the kerfs can be arbitrarily determined according to the application of the plastic tape. For example, it is also possible to form kerfs in a lattice shape, align with any kerfs, and bend along the longitudinal direction or at a right angle to the longitudinal direction. It is also possible to provide a large number of kerfs in one direction at narrow intervals, and make the kerfs outward to form a curved shape of the plastic tape. The depth of the kerf may be a depth suitable for bending, and it depends on the material of the band-shaped body, but is generally about 40 to 60% of the thickness of the band-shaped body. As the adhesive, a resin-based adhesive that is usually used, for example, a synthetic rubber-based adhesive is used. Also, in order to protect the adhesive layer, a release paper is preferably attached on the adhesive layer.

Further, according to another aspect of the present invention, there is provided a plastic tape in which a substantially V-shaped groove is provided on one surface orthogonal to a thickness direction of a band-shaped body having a plastic base material, and the one surface is provided. A plastic tape with an adhesive layer formed on top of it, with the groove facing inward and the band-shaped body bent to form a surface that intersects with the groove, and the tape was adhered to the adherend. Is characterized by.

In the plastic tape of the present invention, the substantially V-shaped groove is a groove having a cross-sectional shape that spreads outward toward the outside, and is not necessarily V-shaped, but is U-shaped. Although the grooves may be close to each other, a V-shaped groove is preferable from the viewpoint of adhesiveness to the adherend. In the case of a V-shaped groove, the angle α sandwiched by the side walls of the groove (see Fig. 4 (b)) should be 180 ° minus the external angle of the adherend to which the plastic tape is attached. It is desirable to make it easy to fit the adherend. Other configurations are basically the same as the requirements for the plastic tape described above, except that the groove has a substantially V-shape and the adhesive layer is formed on the groove-side surface of the strip. It is the same.

A preferred embodiment of the above-mentioned plastic tape of the present invention is characterized in that the base material plastic is a foam. By forming a strip with an appropriate thickness using a plastic having an appropriate expansion ratio as a base material, the obtained strip can have required rigidity, flexibility and toughness that does not easily tear. is there. The preferred foamed plastic used in this preferred embodiment is a polyolefin-based foamed plastic having an appropriate expansion ratio. The polyolefin foamed plastic to be used is not particularly limited in its type, and is a plastic foamed from a plain polyolefin resin material or a material containing a plurality of kinds of polyolefin resin blended. Preference is given to expanded plastics formed from ethylene-propylene copolymers alone or in mixtures with an ethylene content of 1 to 15% by weight. A suitable expansion ratio is 1.5 to 5 times. This is because when the expansion ratio is in this range, the foamed plastic tape of the present invention has the required mechanical strength and flexibility required for the purpose, is lightweight, and easily fits on the adherend.

[0013]

[Action]

 According to the first aspect of the present invention, a tape having appropriate rigidity, flexibility and toughness can be realized by using plastic as the base material of the band-shaped body, and the kerf is formed on the surface of the band-shaped body. However, by bending the cut groove outward, the relatively rigid plastic tape can be easily bent. According to the second aspect of the present invention, a relatively V-shaped groove is formed on the surface of the band-shaped body, and the substantially V-shaped groove is bent inward, so that the relatively rigid plastic tape can be easily bent. Since the groove faces inward, there is no crack from the bottom of the groove and the appearance is beautiful. According to the third aspect of the present invention, by using the foamed plastic as the base material of the plastic tape, it is possible to realize a plastic tape having required rigidity, flexibility and toughness that does not easily tear.

[0014]

【Example】

Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings. Embodiment 1 FIG. 1 is a perspective view showing the constitution of one embodiment of the plastic tape according to the present invention, and FIG. 2 is a diagram showing an example of using the plastic tape having the constitution shown in FIG. 2A is a perspective view, and FIG. 2B is an enlarged cross-sectional view of the plastic tape taken along line XX of FIG. 2A. FIG. 3 is a diagram showing another example of using the plastic tape. The strip 12 of the plastic tape 10 shown in FIG. 1 is formed from a polypropylene foam plastic, specifically, an ethylene-propylene copolymer having an ethylene content of 1 to 15% by weight. Examples of the ethylene-propylene copolymer include, for example, 40 parts by weight of a propylene-ethylene block copolymer (ethylene content 11% by weight, MI 0.8 g / 10 minutes) and a propylene-ethylene random copolymer (ethylene content 2 0.3% by weight, MI 10.0 g / 10 minutes) 60 parts by weight. The band-shaped body 12 is manufactured by melting and mixing the above-mentioned compounded resin in an extruder at a temperature of 175 to 188 ° C., while introducing carbon dioxide gas into the atmosphere from the T die at the tip of the extruder. It is extruded and foamed, and then formed into a band shape by a forming roll.

In this example, as the band-shaped body 12, a non-crosslinked low-foaming polypropylene sheet (trade name: F-cell) manufactured and sold by Furukawa Electric Co., Ltd. was cut into a band having a width of 50 mm and used. Various foaming ratios and thicknesses were used as listed below. Expansion ratio (times) Thickness (mm) Example 1 1.7 1.5 Example 2 1.7 2.5 Example 3 3.5 3.8 Example 4 4.0 3.75 Example 5 3.5 3.8

As shown in FIG. 1, in the above-mentioned strip 12, the cut grooves 14 are formed in the vertical and horizontal directions on the surface 13 orthogonal to the thickness direction of the strip 12. The depth of the kerf 14 is about ½ of the thickness of the strip 12 and its width is very narrow, which is like a kerf cut with a thin sharp knife edge. The interval between the cut grooves 14 can be arbitrarily determined according to the application. In this embodiment, a plurality of kerfs 14 are provided in parallel in the width direction at intervals of about 7 mm, and one kerf 14 is provided in the center of the strip 12 in the longitudinal direction. The cut grooves 14 do not necessarily have to be provided in a vertical and horizontal lattice pattern, and only one cut groove may be provided along the longitudinal direction of the strip 12 depending on the application, and a large number of cut grooves may be provided only in the horizontal direction. The groove 14 may be provided. An adhesive layer 16 is formed on the surface 15 of the strip 12 opposite to the kerf 14 side. The adhesive is an ordinary one, and for example, a commercially available chloroprene rubber adhesive can be used. Further, in order to protect the adhesive layer 16, the release paper 18 is attached on the adhesive layer 16 so that it can be easily peeled off. When using, the release paper 18 is peeled off to expose the adhesive layer 16. Then, the plastic tape 10 is attached to the adherend.

The plastic tape 10 of this embodiment can be used for various purposes. For example, FIG. 2A shows an example in which the box wall bent portion A of a rectangular parallelepiped cardboard box is reinforced or repaired using the plastic tape 10. In use, the plastic tape 10 is folded along the kerf 14 as shown in FIG. 2 (b) and so as to form two surfaces that intersect at 90 ° with the kerf 14 outward and then The release paper 18 is peeled off, and the plastic tape 10 is pressure-bonded to the bent portion A of the box wall via the adhesive layer 16.

FIG. 3A shows an example in which a plastic tape 19 cut in the shape of an arrow is attached to a cylinder B to provide a guide in the traveling direction, and FIG. 3B shows a case where a kerf 14 is formed in the longitudinal direction. It is sectional drawing of the example which cured the cutting edge C of the thin plywood board or corrugated paper using two plastic tapes 20 provided at intervals. In FIG. 3 (b), 16 indicates an adhesive layer. Alternatively, the plastic tape 10 of the present embodiment may be applied to the uneven surface according to the surface shape, and the plastic tape 10 of the present embodiment may be used as a protective tape for temporarily protecting the surface. it can. Although not shown, for example, the plastic tape 10 according to the present embodiment is used as a protective tape that is attached to an edge of an object when the object is transported to protect the edge. When used for such purposes, it is desirable to form the adhesive layer 16 with an adhesive that allows the plastic tape to be easily peeled off later. Further, although not shown, prepare a plastic tape according to the present invention having a large number of cut grooves 14 in the longitudinal direction, and put a plurality of such tapes on the outer peripheral surface of a cylindrical corrugated cardboard box. It can also be attached parallel to the height of the box to reinforce the cardboard box.

Since the plastic tape 10 is formed of the strip 12 made of polyolefin foamed plastic as a base material, it has rigidity, flexibility and toughness, and is lightweight, water resistant and chemical resistant. Optimal as a reinforcing material or repair material. The plastic tape 10 has an advantage that it can be freely attached to the surface of an object having a complicated shape by providing the cut groove 14 according to the shape, not limited to the above example.

Embodiment 2 FIG. 4 (a) is a partially cutaway perspective view showing the construction of another embodiment of the plastic tape according to the present invention, and FIG. 4 (b) is the arrow Y of the plastic tape of FIG. 4 (a). It is a sectional view of -Y. 5A and 5B are views showing an example of use of the plastic tape having the structure shown in FIG. 4, in which FIG. 5A is a perspective view and FIG. It is an expanded sectional view of a plastic tape. The plastic tape 30 of the present embodiment is different from that of the first embodiment except that a V-shaped groove 34 is provided and an adhesive layer 36 is formed on the surface on which the V-shaped groove 34 is provided. Same as 1.

In this embodiment, as shown in FIGS. 4 (a) and 4 (b), the V-shaped groove 34 is formed between the side walls of the groove formed on the surface 33 orthogonal to the thickness direction of the strip 32. It is a V-shaped groove with an angle α of about 90 °. Its depth is about 1/2 of the thickness of the strip 32. One V-shaped groove 34 is provided along the longitudinal direction of the strip 32. The V-shaped grooves 34 can be provided in the form of vertical and horizontal lattices as in the first embodiment. The adhesive layer 36 is formed on the surface 33 of the band-shaped body 30 on the side where the V-shaped groove 34 is engraved. In this embodiment, the adhesive layer 36 is not formed on the groove side wall surface of the V-shaped groove 34, but it may be formed on the groove side wall surface. Further, a release paper 38 is attached on the adhesive layer 36 so that it can be easily peeled off. When used, the release paper 38 is peeled off to expose the adhesive layer 36 and attach it to an adherend. .

The plastic tape 30 of the second embodiment can also be used for various purposes, like the plastic tape 10 of the first embodiment. For example, the plastic tape 30 is used to reinforce or repair the box wall bent portion A of the corrugated cardboard box as shown in FIG. In use, as shown in FIG. 5 (b), it is necessary to form two flat surfaces along the V-shaped groove 34, with the V-shaped groove 34 facing inward and intersecting at 90 °. Bend the tic tape 30. Then, the release paper 38 is peeled off, and the plastic tape 30 is pressure-bonded to the bent portion A of the box wall via the adhesive layer 36. The plastic tape 30 is not limited to this example, and by forming a number of V-shaped grooves 34 in the vertical and horizontal directions according to the shape of the adherend, the plastic tape 30 can be freely adhered to the surface of an object having a complicated shape. Have advantages.

Since the plastic tape 30 uses the band-shaped body 32 made of polyolefin foamed plastic as a base material, it has rigidity, flexibility and toughness required as a reinforcing material or a repair material, and has a narrow angle Since the 90 ° V-shaped groove 34 is provided in the strip 32, the strip 32 can be easily bent so as to form a 90 ° intersecting surface. Further, since it is bent with the V-shaped groove 34 inward, no cracks occur at the groove bottom, and the appearance is beautiful, making it more suitable as a reinforcing material or repair material.

[0024]

[Effect of device]

 The plastic tape of the present invention is formed by forming a kerf on a plastic-based band, bending the band so that the kerf faces outward, and forming a surface intersecting the kerf. Since it is attached to an adhesive body, it has rigidity, flexibility and toughness as well as is lightweight, has water resistance and chemical resistance, and realizes an adhesive plastic tape that can be used for multiple purposes. In another embodiment of the plastic tape of the present invention, a substantially V-shaped groove is formed in place of the kerf, and the band is folded so that the groove faces inward and the intersecting surface is formed along the groove. Since it is bent and adhered to the adherend, cracks do not grow from the grooves and the appearance is beautiful. In a plastic tape according to still another aspect of the present invention, an adhesive tape having required rigidity, flexibility and toughness that does not tear easily is realized by using foamed plastic as the base material of the band. INDUSTRIAL APPLICABILITY The plastic tape according to the present invention can be used for various purposes because it is possible to form a kerf in the belt-shaped body in a direction and at an interval such that the belt-shaped body can be bent or curved freely into an arbitrary shape. For example, it is most suitable as a tape for reinforcing and repairing cardboard boxes or plastic boxes. .

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of a plastic tape according to the present invention.

FIG. 2 (a) is a perspective view showing an example in which a box wall bent portion of a cardboard box is reinforced or repaired using a plastic tape, and FIG. 2 (b) is an arrow view of FIG. 2 (a). It is an expanded sectional view of the plastic tape in XX.

3 (a) and 3 (b) are views showing various uses of the plastic tape according to the present invention.

FIG. 4 (a) is a partially cutaway perspective view showing the configuration of another embodiment of the plastic tape according to the present invention, FIG. 4 (b).
FIG. 4 is a sectional view taken along the line YY of FIG.

5 (a) is a perspective view showing an example in which a box wall bent portion of a corrugated cardboard box is reinforced or repaired by using another embodiment of the plastic tape shown in FIG. 4, FIG. 5 (b). Figure 5
It is an expanded sectional view of the plastic tape in arrow ZZ of (a).

[Explanation of symbols]

10 One Example of the Plastic Tape According to the Present Invention 12 Belt 13 Surfaces orthogonal to the thickness direction of the belt 14 Grooves 15 Surfaces opposite to the grooves 16 Adhesive layer 18 Release paper 20 Cutting grooves 2 in the longitudinal direction A plastic tape according to the present invention containing a book 30 Another embodiment of the plastic tape according to the present invention 32 Strips 33 Surfaces orthogonal to the thickness direction of the strips 34 V-shaped grooves 36 Adhesive layer 38 Release paper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Tomizuka 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A strip (1) made of plastic as a base material.
2) A groove (1) is formed on one surface (13) orthogonal to the thickness direction.
4) A plastic tape provided with an adhesive layer (16) on the surface (15) opposite to the one surface, the cutting groove being directed outward and intersecting along the cutting groove. A plastic tape characterized in that a band-shaped body is bent so as to form a surface and is attached to an adherend. 2. A strip-shaped body (3
2) A substantially V-shaped groove (34) is provided on one surface (33) orthogonal to the thickness direction, and an adhesive layer (36) is provided on the one surface.
A plastic tape in which a groove is formed, the groove is directed inward, the band-shaped body is bent to form a surface intersecting with the groove, and the band-shaped body is adhered to an adherend. tape. 3. The plastic tape according to claim 1 or 2, wherein the base plastic is a foam.