WO2022102330A1

WO2022102330A1 - Binding tape

Info

Publication number: WO2022102330A1
Application number: PCT/JP2021/037978
Authority: WO
Inventors: 洋亮楯; 佳明山本; 大輔吉村
Original assignee: デンカ株式会社
Priority date: 2020-11-12
Filing date: 2021-10-14
Publication date: 2022-05-19
Also published as: TW202227268A; JPWO2022102330A1

Abstract

[Problem] To provide a binding tape that has flexibility for allowing electric wires to be bent, and has high abrasion resistance, while having excellent binding workability. [Solution] This binding tape has: a base material layer comprising a nonwoven fabric that includes fibers (A) containing a thermoplastic elastomer, and a resin layer laminated on one surface of the nonwoven fabric; and an adhesive layer. The basis weight of the nonwoven fabric is preferably 20-350 g/m2. The lamination amount of the resin layer is preferably 20-350 g/m2. The tensile break strength of the binding tape in the longitudinal direction is preferably 20 N/10 mm or more.

Description

Bundling tape

The present invention relates to a binding tape.

In the wiring of automobiles and the like, electric wires bundled in a predetermined shape with a binding tape are used. The tape for bundling electric wires and the like is required to have excellent wear resistance from the viewpoint of preventing the electric wires from coming into contact with surrounding walls and interior materials and being damaged. Further, in recent years, with the spread of electric vehicles, the diameter of electric wires after binding has increased, but from the viewpoint of design freedom, it is required to be bent even when the binding tape is wound.
So far, as a tape having high wear resistance, for example, a binding tape using polyethylene terephthalate (PET) knitted fabric as a base material, a binding tape having a base material in which a non-woven fabric having a specific thickness and a resin film are bonded, and the like. Have been proposed (for example, Patent Documents 1, 2, etc.). However, since such a binding tape does not stretch in the longitudinal direction, there is a problem that the flexibility of the electric wires after binding is poor.

As a binding tape having flexibility to bend electric wires after binding, for example, Patent Document 3 describes an adhesive with a film base material containing an aromatic vinyl-based elastomer, a styrene-based copolymer, and a styrene-based resin. Adhesive tapes with an agent layer have been proposed. Further, Patent Document 4 proposes a protective tube made of a thermoplastic resin and in which a sheet having a 100% tensile modulus of 50 MPa or less is wound in the circumferential direction.

Japanese Unexamined Patent Publication No. 2010-154634 Japanese Unexamined Patent Publication No. 2009-137296 Japanese Unexamined Patent Publication No. 2008-143976 Japanese Unexamined Patent Publication No. 2018-152983

In recent years, it has been required to have a higher degree of wear resistance in wiring applications such as automobiles. That is, in the scrape wear test, a binding tape capable of achieving 100 or more wear times is required. However, the conventional binding tape has a problem that the above wear test cannot be cleared.
Further, the binding tape binds the object while pulling the tape in the longitudinal direction during the binding operation, but if the tape is stretched too much, it becomes difficult to fix the object and the workability is lowered. Therefore, there is a demand for a binding tape that can achieve both flexibility and binding workability.
Therefore, an object of the present invention is to provide a binding tape having high wear resistance, flexibility to bend electric wires, and excellent binding workability.

As a result of diligent studies on the above problems, the inventors of the present application have described above if it is a non-woven fabric containing a fiber containing a thermoplastic elastomer component, a base material layer including a resin layer, and a binding tape having an adhesive layer. We have found that all the problems can be solved, and have completed the present invention.
That is, the present invention has the following aspects.
[1] A binding tape having a base material layer including a non-woven fabric containing a fiber (A) containing a thermoplastic elastomer, a resin layer laminated on one surface of the non-woven fabric, and an adhesive layer.
[2] The binding tape according to [1], wherein the nonwoven fabric has a basis weight of 20 to 350 g / m ² .
[3] The binding tape according to [1] or [2], wherein the laminated amount of the resin layer is 20 to 350 g / m ² .
[4] The item according to any one of [1] to [3], wherein the thermoplastic elastomer comprises at least one selected from an olefin-based thermoplastic elastomer, a urethane-based thermoplastic elastomer, and a styrene-based thermoplastic elastomer. The described binding tape.
[5] The binding tape according to any one of [1] to [4], wherein the resin layer contains at least one resin selected from polyvinyl chloride and an ethylene-vinyl acetate copolymer.
[6] The binding tape according to any one of [1] to [5], wherein the nonwoven fabric has a fused portion.
[7] The fused portion is provided on the other surface on which the resin layer of the nonwoven fabric is not laminated, and the ratio of the total area of the fused portions is the total area of the other surface of the nonwoven fabric. On the other hand, the binding tape according to [6], which is 20 to 80%.
[8] The binding tape according to any one of [1] to [7], wherein the tensile breaking strength in the longitudinal direction of the binding tape is 20 N / 10 mm or more.
[9] The binding tape according to any one of [1] to [8], which is used for binding electric wires and the like.

According to the present invention, it is possible to provide a binding tape having high wear resistance, flexibility to bend electric wires, and excellent binding workability.

It is sectional drawing which shows one aspect of the binding tape of this invention. It is a laser micrograph which shows one aspect of the nonwoven fabric of the binding tape of this invention. In the Example, it is explanatory drawing which shows the measuring method of the three-point bending load for evaluating the flexibility of a binding tape. It is explanatory drawing explaining the shape of the No. 3 dumbbell for making the test piece for tensile strength measurement.

Hereinafter, the present invention will be described in detail, but the present invention is not limited to the following aspects.
[Binding tape]
The binding tape according to the present invention is a binding tape having a nonwoven fabric containing a fiber (A) containing a thermoplastic elastomer, a base material layer including a resin layer laminated on one surface of the nonwoven fabric, and an adhesive layer. It is characterized by being. The binding tape according to the present invention having such a configuration has good flexibility and can bend electric wires after binding. In addition, it is possible to prevent the tape from being stretched too much during the bundling work and the workability from being deteriorated. It also has excellent wear resistance. That is, the binding tape according to the present invention can be worn 100 times or more in the scrape wear test.

FIG. 1 is a cross-sectional view showing one aspect of the binding tape of the present invention. The binding tape 100 has a structure in which the non-woven fabric 10, the resin layer 20, and the adhesive layer 30 are laminated in this order. Further, the nonwoven fabric 10 is composed of fibers containing fibers (A) containing a thermoplastic elastomer. The binding tape 100 according to the present invention having such a configuration has high wear resistance, flexibility to bend electric wires, and is also excellent in binding workability.

(Base layer)
The base material layer in the binding tape according to the present invention includes a nonwoven fabric containing fibers (A) containing a thermoplastic elastomer and a resin layer laminated on one surface of the nonwoven fabric.

<Non-woven fabric>
The non-woven fabric contains a fiber (A) containing a thermoplastic elastomer. Thermoplastic elastomer means an elastomer that softens by heating and exhibits fluidity, has the property of returning to a rubber-like state when cooled, and exhibits rubber elasticity at room temperature. When the nonwoven fabric contains the fiber (A) containing the thermoplastic elastomer, the flexibility of the binding tape is improved. Further, it becomes easy to adjust the tensile breaking strength in the length direction of the binding tape to 20 N / 10 mm or more. As used herein, the "longitudinal direction of the binding tape" means the direction in which the tape is pulled out in the binding tape in a rolled state. On the other hand, the direction orthogonal to the longitudinal direction is described as "width direction". In the present specification, the longitudinal direction of the binding tape may be described as "MD direction", and the "width direction" may be described as "TD direction".

<Fiber (A)>
As used herein, the term "fiber (A) containing a thermoplastic elastomer" means that at least a thermoplastic elastomer component is contained in the components constituting the fiber (A). The nonwoven fabric according to the present invention is composed of a fiber containing a fiber (A) containing a thermoplastic elastomer.
As the thermoplastic elastomer contained in the fiber (A), for example, one having a tensile strength of 2 to 40 MPa measured according to the standard of JIS K7311-1995 is preferable. Examples of such thermoplastic elastomers include olefin-based thermoplastic elastomers (TPOs), urethane-based thermoplastic elastomers (TPUs), styrene-based thermoplastic elastomers (TPS), ester-based thermoplastic elastomers, and polyamide-based thermoplastic elastomers (TPS). TPAE) and the like. These thermoplastic elastomers may be used alone or in combination of two or more. The specific method for measuring the tensile strength of the thermoplastic elastomer is as follows.
(Measuring method of tensile strength of thermoplastic elastomer)
The tensile strength is measured according to the JIS K7311-1995 standard. Specifically, a thermoplastic elastomer resin is injection-molded to prepare a flat plate-shaped sample having a size of 100 mm square and a thickness of 2 mm. This sample is punched out with a No. 3 dumbbell (see Fig. 4) specified by JIS K6251 as a test piece, and the test piece is sandwiched and fixed to the chuck part of the tensile tester so that the distance between the chucks is 70 mm. .. The distance between the marked lines is 20 mm, the test piece is pulled at a test speed of 300 mm / min, the load until the test piece breaks is measured, and the value obtained by dividing the maximum value by the cross-sectional area is taken as the tensile strength. In the explanatory diagram of the No. 3 dumbbell in FIG. 4, the numbers shown mean the dimensions (unit: mm).

Examples of the olefin-based thermoplastic elastomer (TPO) include ethylene propylene diene rubber-dispersed polypropylene (PP + EPDM).
Examples of the urethane-based thermoplastic elastomer (TPU) include polyester-based TPU and polyether-based TPU.
Examples of the styrene-based thermoplastic elastomer (TPS) include styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene-styrene block copolymer (SBS), and styrene-ethylene-propylene-styrene block. Polymers (SEPS), styrene-isoprene-styrene block copolymers (SIS) and the like can be mentioned.
Examples of the ester-based thermoplastic elastomer include polyether ester-polyester block copolymer (TPC-EE), polyether ester block copolymer (TPC-ET), polyester block copolymer (TPC-ES), and the like. Can be mentioned.
Examples of the polyamide-based thermoplastic elastomer (TPAE) include polyamide-polyester ester-polyester block copolymer (TPA-EE), polyamide-polyester block copolymer (TPA-ES), and polyamide-polyester ester block. Examples thereof include a polymer (TPA-ET).
Of these, from the viewpoint of easily achieving both flexibility and tensile strength, the thermoplastic elastomer contained in the fiber (A) is an olefin-based thermoplastic elastomer (TPO), a urethane-based thermoplastic elastomer (TPU), or a styrene-based heat. A plastic elastomer (TPS) is preferable, and a urethane-based thermoplastic elastomer (TPU) is more preferable. Further, as the urethane-based thermoplastic elastomer, polyester-based TPU is more preferable.

When the fiber (A) contains a component (other components) other than the thermoplastic elastomer, the ratio of the thermoplastic elastomer to the component (100% by mass) constituting the fiber (A) is determined from the viewpoint of flexibility. It is preferably 80 to 99% by mass, more preferably 90 to 99% by mass, and particularly preferably 95 to 99% by mass. In one preferred embodiment, the fiber (A) may be a fiber consisting only of a thermoplastic elastomer. That is, the proportion of the thermoplastic elastomer component in the components constituting the fiber (A) may be 100% by mass.
The other components in the fiber (A) are not particularly limited, and examples thereof include polyolefins such as polyethylene and polypropylene, polyester and the like. These other components may be used alone or in combination of two or more. When the fiber (A) contains other components, it is preferable to contain polyolefin because the strength of the nonwoven fabric is likely to be improved.

The fiber diameter of the fiber (A) is preferably 1 to 40 μm, more preferably 5 to 30 μm, from the viewpoint of easily achieving both strength and flexibility of the nonwoven fabric. The fiber diameter refers to a value calculated from the average value obtained by measuring the diameter of 10 arbitrary fibers (A) using a laser microscope.

The non-woven fabric may contain fibers (other fibers) other than the fibers (A). When the nonwoven fabric contains other fibers, the ratio of the fibers (A) to the total mass of the fibers constituting the nonwoven fabric is preferably 80% by mass or more, more preferably 90% by mass or more. When the ratio of the fiber (A) to the total mass of the fibers constituting the non-woven fabric is within the above range, the flexibility tends to be good. In one preferred embodiment, the nonwoven fabric may be composed of only the fibers (A).
Other fibers contained in the non-woven fabric are not particularly limited, and examples thereof include polyolefin fibers such as polyethylene and polypropylene, aramid fibers, glass fibers, cellulose fibers, nylon fibers, vinylon fibers, polyester fibers, and rayon fibers. These other fibers may be used alone or in combination of two or more. In one embodiment, the nonwoven fabric may be a mixed fiber of the fiber (A) and a polyolefin fiber as another fiber.
The other fibers preferably have a fiber diameter similar to that of the fiber (A). That is, the fiber diameter is preferably 1 to 40 μm, more preferably 5 to 30 μm. The fiber diameter of the other fibers can be determined by the same method as that of the fiber (A).

The nonwoven fabric may have a fused portion. The fused portion is formed as a recessed portion on the surface of the nonwoven fabric by joining the fibers constituting the nonwoven fabric to each other. The fused portion may be formed by mechanical treatment or may be formed by embossing. In one aspect of the present invention, the fused portion is preferably formed by heat-sealing fibers constituting the nonwoven fabric by heat embossing. By having such a fused portion, the stress relaxation in the horizontal direction acting at the time of wear becomes large, and the wear resistance is more likely to be improved. In addition, it becomes easy to prevent the binding tape from being stretched too much during the binding work and the workability from being deteriorated.
Further, it is preferable that the fused portion is provided on the "surface on the side where the resin layer is not laminated" (hereinafter, referred to as "the other surface of the nonwoven fabric") of the nonwoven fabric. That is, in one preferred embodiment, the resin layer may be laminated on one surface of the nonwoven fabric, and the fused portion may be provided on the other surface of the nonwoven fabric.
The fused portion formed on the other surface of the nonwoven fabric may be of one type or two or more types. Here, "two or more types of fused portions" means that two or more types of fused portions having different shapes are provided, and two or more types of fused portions having different sizes (areas) are provided. , Or a mixture of them.

The shape of the fused portion is not particularly limited as long as it has the effect of the present invention, and is, for example, a circular shape (a perfect circle or an elliptical shape), a rhombus shape (a rhombus or a similar shape (however, not including a square)). Shapes such as a quadrangle (rectangle, square, trapezoid, etc., including rounded quadrangle) can be mentioned. Of these, from the viewpoint of easily improving the wear resistance and the binding workability of the binding tape, it is preferably circular or square, and particularly preferably square.
The area of the fused portion is preferably 0.5 to 4.0 mm ² and more preferably 0.8 to 3.8 mm ² from the viewpoint of easily improving wear resistance and bundling workability. It is particularly preferably 1.2 to 3.5 mm ² .
The fused portions may be randomly arranged on the other surface of the nonwoven fabric, and may be arranged linearly or in a grid pattern. Of these, it is preferable that they are arranged in a grid pattern from the viewpoint that wear resistance is more likely to be improved.
When the nonwoven fabric includes a fused portion, the ratio of the total area of the fused portions provided on the nonwoven fabric is preferably 20 to 80%, preferably 50 to 75% of the total area of the other surface of the nonwoven fabric. % Is more preferable. When the total area of the fused portions is within the above range, wear resistance and bundling workability are more likely to be improved.

When the nonwoven fabric has a fused portion, it is preferably formed by heat-sealing fibers constituting the nonwoven fabric by heat embossing as described above. That is, it is preferable that the convex portion for forming the fused portion of the present invention is formed by sandwiching the non-woven fabric between the heat embossed roll formed on the surface and the flat roll and applying pressure.
The temperature at the time of heat embossing is, for example, preferably 100 to 150 ° C, more preferably 100 to 130 ° C.

As the non-woven fabric, for example, a non-woven fabric produced by the spunbond method, a non-woven fabric produced by the spunlace method, a non-woven fabric produced by the melt blow method, or the like can be used. Further, the nonwoven fabric may be a single layer or a laminated nonwoven fabric composed of a plurality of layers. Further, in the case of a laminated nonwoven fabric, the nonwoven fabrics produced by a plurality of methods may be laminated. Of these, from the viewpoint of mechanical strength, it is preferable to use a non-woven fabric (spun-bonded non-woven fabric) produced by the spunbond method.
The basis weight of the nonwoven fabric is preferably 20 to 350 g / m ² , more preferably 30 to 320 g / m ² , and even more preferably 50 to 300 g / m ² . When the basis weight of the non-woven fabric is within the above range, the abrasion resistance is likely to be improved while suppressing the increase in the tape weight. The porosity is preferably 40 to 90%.
The apparent density is preferably 0.1 to 0.5 g / cm ³ , more preferably 0.2 to 0.45 g / cm ³ . When the apparent density of the non-woven fabric is within the above range, the flexibility of the bound product tends to be good while maintaining high wear resistance.

FIG. 2 is a laser micrograph showing an example of the fused portion 1 provided on the surface of the nonwoven fabric 10 of the binding tape 100. In FIG. 2, the square fused portion 1 is provided on the surface of the nonwoven fabric 10 (the other surface) in a grid pattern.

<Resin layer>
The resin layer is laminated on one surface of the nonwoven fabric. In one embodiment, the resin layer is preferably laminated directly on one surface of the nonwoven fabric.
When the base material layer contains the non-woven fabric and the resin layer, the wear resistance of the binding tape is improved. In addition, it is possible to prevent the binding tape from being stretched too much during the binding operation and the workability from being deteriorated.
The resin constituting the resin layer is not particularly limited as long as it has the effect of the present invention. From the viewpoint of improving wear resistance more easily, it is selected from polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polyvinyl alcohol (PVA), and a copolymer of ethylene and vinyl acetate (EVA). It preferably contains at least one resin, more preferably at least one resin selected from PVC and EVA. In addition, these PVC, PP, PE, PVA and EVA may contain a small amount of additives and comonomer as long as the effect of the present invention is not impaired.

As the PVC, for example, one having an average degree of polymerization of 500 to 3000 is preferable, one having an average degree of polymerization of 700 to 2000 is more preferable, and one having an average degree of polymerization of 800 to 1500 is particularly preferable. The average degree of polymerization means a value calculated by JIS-K6720-2 by dissolving 200 mg of a resin in 50 mL of nitrobenzene, measuring the specific viscosity of this polymer solution in a constant temperature bath at 30 ° C. using an Ubbelohde viscometer. do.
The PVC may contain a plasticizer from the viewpoint of flexibility.
Examples of the plasticizer include phthalic acid-based plasticizers, isophthalic acid-based plasticizers, terephthalic acid-based plasticizers, adipic acid-based plasticizers and their polyester-based plasticizers, phosphoric acid-based plasticizers, trimellitic acid-based plasticizers, and epoxys. A system plasticizer or the like can be used.
Specific examples of the plasticizer include diisononyl phthalate (DINP), diheptyl phthalate (DHP), di-2-ethylhexyl phthalate (DOP), di-n-octyl phthalate (n-DOP), and diisodecyl phthalate (n-DOP). DIDP), di-2-ethylhexyl isophthalate (DOIP), di-2-ethylhexyl terephthalate (DOTP), benzylbutylphthalate (BBP), tri-2-ethylhexyl trimellitic acid (TOTM), di-2-adipate Ethylhexyl (DOA), tricresyl phosphate (TCP), benzyloctyl adipate (BOA), adipic acid-propylene glycol polyester, adipic acid-butylene glycol polyester, phthalic acid-propylene glycol polyester, diphenyl cresil phosphate (DPCP) ), Diisodecyl adipic acid, epoxidized soybean oil, epoxidized flaxseed oil, chlorinated paraffin and the like. These may be used alone or in combination of two or more. Among the above-mentioned plasticizers, DINP, which is inexpensive and has a high plasticizing effect, is more preferable.
When the PVC contains a plasticizer, the content thereof is preferably 40 to 70 parts by mass, more preferably 50 to 65 parts by mass, still more preferably 57 to 65 parts by mass with respect to 100 parts by mass of the polyvinyl chloride resin.
Inorganic fillers, modifiers, other additives and the like can be added to PVC, if necessary, as long as the effects of the present invention are not impaired. Examples of other additives include colorants, stabilizers, antioxidants, ultraviolet absorbers, lubricants and the like. These blending amounts are arbitrary.

Examples of PP include resins having isotactical or syndiotactic crystalline properties. Further, PP may be a copolymer of a small amount of comonomer. Such PP may have a melting point in the range of 155 to 175 ° C., preferably 160 to 170 ° C. by differential scanning calorimetry (DSC), for example.

As the PVA, for example, PVA having a saponification degree of 70 to 90 mol% is preferable.
Further, the EVA preferably has an ethylene content in the range of 5 to 99%, preferably 10 to 98%, from the viewpoint of wear resistance and bundling workability.

Examples of PE include low density polyethylene (LDPE) and high density polyethylene (HDPE). Examples of the LDPE include those having a density of 0.91 g / cm ³ or more and less than 0.95 g / cm ³ , preferably 0.93 to 0.94 g / cm ³ . Examples of HDPE include those having a density of 0.95 g / cm ³ or more and 0.97 g / cm ³ or less, preferably 0.95 to 0.96 g / cm ³ . Further, the melting point measured by differential scanning calorimetry (DSC) may be in the range of 110 to 140 ° C, preferably 120 to 135 ° C.

The resin layer may be formed by impregnating or coating the non-woven fabric with the above-mentioned resin, or may be a film or sheet containing the above-mentioned resin laminated on the non-woven fabric.
When the resin layer is a layer formed by impregnating or coating a non-woven fabric with the above-mentioned resin, as a method for forming the resin layer, for example, a method of applying with a gravure coater, a comma coater, a die coater or the like is used. Can be mentioned.
On the other hand, when a film or sheet containing the above-mentioned resin is laminated on a nonwoven fabric to form a resin layer, the film or sheet may be, for example, a film or sheet obtained by extrusion film formation by a sheet extruder. preferable.

The amount of the resin layer laminated is preferably 20 to 350 g / m ² , more preferably 30 to 320 g / m ² , and even more preferably 50 to 300 g / m ² . When the amount of the resin layer laminated is within the above range, the wear resistance is likely to be improved. In addition, it is easier to achieve both flexibility and binding workability.
In one embodiment, the substrate layer may be composed of only a non-woven fabric and a resin layer.

The thickness of the base material layer is preferably 300 to 1200 μm, more preferably 300 to 600 μm. When the thickness of the base material layer is within the above range, wear resistance and flexibility tend to be good. The thickness of the base material layer is measured at three points using a dial gauge specified in JIS B7503, and means the average value thereof.

The base material layer may include a layer (intermediate layer) other than the above-mentioned non-woven fabric and resin layer. When the intermediate layer is provided, it may be provided between the nonwoven fabric and the resin layer, or on the surface of the resin layer on the side where the nonwoven fabric is not laminated.

(Adhesive layer)
In the binding tape according to the present invention, the adhesive layer is provided on at least one surface of the base material layer. Further, it is particularly preferable that the adhesive layer is directly laminated on the resin layer.
The adhesive layer is preferably composed of an adhesive. The pressure-sensitive adhesive is not particularly limited as long as it has the effect of the present invention, and a pressure-sensitive adhesive conventionally used for a binding tape can be appropriately used. Specifically, as the pressure-sensitive adhesive, for example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, or the like can be used.

As the acrylic pressure-sensitive adhesive, for example, one containing an acrylic polymer as a main component can be used.
Examples of the acrylic polymer include polymers of (meth) acrylic acid alkyl esters and carboxy group-containing unsaturated monomers. In addition, "(meth) acrylic acid" means acrylic acid and methacrylic acid.
Examples of the (meth) acrylic acid alkyl ester include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, n-butyl acrylate, and n-butyl methacrylate. Isobutyl acrylate, isobutyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-octyl acrylate, n-octyl methacrylate, isooctyl acrylate, Examples thereof include isooctyl methacrylate, n-nonyl acrylate, n-nonyl methacrylate, isononyl acrylate, and isononyl methacrylate. These may be used alone or in combination of two or more.

The carboxy group-containing unsaturated monomer is not particularly limited as long as it is copolymerizable with the above-mentioned (meth) acrylic acid alkyl ester, as long as it has the effect of the present invention, and is, for example, acrylic acid, methacrylic acid, and the like. Itaconic acid, fumaric acid, maleic acid and the like can be used. These may be used alone or in combination of two or more.

The acrylic polymer may be a copolymer containing a (meth) acrylic acid alkyl ester as exemplified above or a monomer other than the carboxy group-containing unsaturated monomer.
Examples of other monomers include hydroxyl group-containing monomers such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and hydroxyhexyl (meth) acrylate; (meth) acrylamide, acryloylmorpholine, and (meth). Nitrogen-containing (meth) acrylates such as acrylonitrile; examples thereof include vinyl acetate, styrene, vinylitene chloride, vinyl propionate and the like. These may be used alone or in combination of two or more.

In one embodiment of the present invention, when an acrylic pressure-sensitive adhesive is used as the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer, a phenomenon in which a low molecular weight component contained in the acrylic pressure-sensitive adhesive permeates the non-woven fabric of the base material layer (through-through). ), It is preferable that the acrylic polymer is crosslinked.
Examples of the method for cross-linking the acrylic polymer include a method of irradiating with active energy rays (ultraviolet rays, electron beams, etc.), a method of adding an arbitrary cross-linking agent, and the like.
Examples of the optional cross-linking agent include an epoxy-based cross-linking agent, a polyfunctional isocyanate-based cross-linking agent, a melamine resin-based cross-linking agent, a metal salt-based cross-linking agent, a metal chelate-based cross-linking agent, an amino resin-based cross-linking agent, and a peroxide-based cross-linking agent. Agents and the like can be mentioned. These may be used alone or in combination of two or more.

As the rubber-based pressure-sensitive adhesive, for example, at least one rubber component selected from natural rubber (NR) and synthetic rubber is selected from the group consisting of a rosin-based resin, a terpene-based resin, a petroleum-based resin, and the like. Examples thereof include those appropriately blended with one tackifier. Examples of the synthetic rubber include styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), and hydrogenated additives (SIPS, SEBS) of the styrene-based block copolymer. At least one selected from the group consisting of styrene-butadiene rubber (SBR), polyisoprene rubber (IR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (IIR) and the like can be mentioned. Of these, from the viewpoint of easily achieving both high adhesive strength and prevention of back adhesive residue, a combination of natural rubber (NR) and at least one synthetic rubber selected from SBR, CR and IIR is preferable, and natural rubber (natural rubber ( A combination of NR) and SBR is particularly preferred.

Examples of the silicone-based adhesive include those obtained by appropriately blending silicone rubber with silicone resin, silicone oil, or the like.

Examples of the urethane-based pressure-sensitive adhesive include polyols such as polyether-based polyols and polyester-based polyols, and tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), xylylene diisocyanate (XDI) and the like. Examples thereof include those obtained by reacting with polyisocyanate.

The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer may contain any additive in the above-mentioned pressure-sensitive adhesive.
Additives include, for example, softeners, tackifiers, surface lubricants, leveling agents, antioxidants, corrosion inhibitors, light stabilizers, UV absorbers, heat stabilizers, polymerization inhibitors, silane coupling agents. , Lubricants, inorganic or organic fillers, metal powders, pigments and the like. These may be used alone or in combination of two or more.

Examples of the tackifier include petroleum-based resins such as aliphatic copolymers, aromatic copolymers, aliphatic / aromatic copolymers and alicyclic copolymers, and kumaron-inden resins. , Terpene-based resin, terpene phenol-based resin, rosin-based resin such as polymerized rosin, (alkyl) phenol-based resin, xylene-based resin, hydrogenated products thereof and the like. These may be used alone or in combination of two or more.

In one aspect of the present invention, it is preferable to use a rubber-based pressure-sensitive adhesive as the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer from the viewpoint of high adhesive strength and prevention of backside adhesive residue.
The amount of the adhesive layer laminated is preferably 10 to 100 g / m ² , more preferably 20 to 80 g / m ² , and particularly preferably 20 to 60 g / m ² . When the amount of the adhesive layer laminated is within the above range, the wear resistance and the flexibility tend to be better.
Further, the adhesive layer may be composed of a plurality of layers. When the adhesive layer is composed of a plurality of layers, it is preferable that the total amount of the adhesive layers laminated is adjusted to be within the above range.

In one embodiment, the binding tape of the present invention preferably has a total thickness of 200 to 1300 μm, more preferably 240 to 1100 μm, and even more preferably 250 to 650 μm. The binding tape of the present invention having the above-described configuration tends to have good flexibility and good binding workability even when the total thickness is in the range of 200 to 1300 μm.
Further, in one embodiment, the total laminated amount of the binding tape (total laminated amount of the base material layer and the adhesive layer) is preferably 100 to 500 g / m ² from the viewpoint of more easily achieving both flexibility and high wear resistance. , 200-460 g / m ² is more preferred, and 250-450 g / m ² is particularly preferred.

The binding tape according to the present invention preferably has a tensile breaking strength of the tape in the MD direction of 20 N / 10 mm or more. When the tensile breaking strength of the binding tape in the MD direction is 20 N / 10 mm or more, the flexibility of the binding tape becomes better and the electric wires after binding are easily bent. In addition, it becomes easy to prevent the tape from being stretched too much during the binding work and the workability from being deteriorated. In addition, it becomes easy to obtain a binding tape having excellent wear resistance.
The tensile breaking strength of the binding tape in the MD direction is preferably 20 N / 10 mm or more and 70 N / 10 mm or less, more preferably 22 N / 10 mm or more and 60 N / 10 mm or less, and 24 N / 10 mm or more and 50 N / 10 mm or less. Is even more preferable. When the tensile breaking strength of the binding tape in the MD direction is 70 N / 10 mm or less, it becomes easier to prevent the binding tape from being stretched too much during the binding operation and the workability from being deteriorated. In this specification, the tensile breaking strength of the binding tape in the MD direction refers to a value measured according to 8 of JIS Z0237 (2000). Specifically, it refers to the value measured by the following method.
<Measurement method of tensile breaking strength of binding tape in MD direction>
A test piece of binding tape (width (length in the TD direction) 19 mm, length (length in the MD direction) 200 mm, thickness 0.2 to 1.3 mm) in an environment of room temperature 23 ° C. and relative humidity 50% RH. ) Is sandwiched and fixed in the chuck portion of the tensile tester so that the distance between the chucks is 100 mm. After that, the test piece is pulled at a speed of 300 mm / min, the load until the test piece breaks is measured, and the maximum value thereof is taken as the tensile breaking strength.

The tensile breaking strength of the binding tape in the TD direction is not particularly limited. From the viewpoint of easily preventing the tape from breaking due to bending of the bound electric wire, the tensile breaking strength of the bound tape in the TD direction may be 5 to 70 N / 10 mm or 10 to 50 N / 10 mm.

In one embodiment, the binding tape according to the present invention preferably has a scrap wear resistance of 100 times or more, and more preferably 1000 times or more, as measured according to ISO 6722. The scrap wear frequency specifically refers to a value measured by the following method.
<Measuring method of scrap wear resistance>
One layer of binding tape having a width of 19 mm and a length of 50 mm is attached in the longitudinal direction of a steel rod having a diameter of 10 mm. Next, a piano wire having a diameter of 0.45 mm is brought into contact with the base material layer side of the binding tape, and a load of 7 N is applied to reciprocate the piano wire at a speed of 60 times / minute over a distance of 15.5 mm in the longitudinal direction. At this time, the piano wire scrapes the binding tape, and the number of round trips until the binding tape penetrates is defined as the number of scrap wear resistance.

Further, in one embodiment, the binding tape according to the present invention has a tensile elastic modulus of 0 in the MD direction and the TD direction of the binding tape measured according to the measurement conditions of the tensile strength and the elongation in JIS Z0237 (2008). It is preferably 8.08 to 1.5 MPa, more preferably 0.08 to 0.92 MPa, and particularly preferably 0.08 to 0.7 MPa. When the tensile elastic modulus in the MD direction and the TD direction of the binding tape is 0.08 MPa or more, it becomes easy to achieve high wear resistance and good binding workability. When the tensile elastic modulus in the MD direction and the TD direction of the binding tape is 1.5 MPa or less, it becomes easy to obtain a binding tape having excellent flexibility. The tensile elastic modulus of the binding tape specifically refers to a value measured by the following method.
<Measurement method of tensile elastic modulus in MD direction and TD direction of binding tape>
A binding tape test piece having a width of 19 mm and a length of 200 mm is sandwiched and fixed in the chuck portion of the tensile tester so that the distance between the chucks is 100 mm. The test piece is pulled at a speed of 300 mm / min in an environment of room temperature of 23 ° C. and relative humidity of 50% RH, and tensile stress and strain are measured. The value calculated by linear regression for the ratio of the tensile stress to the strain between 5 and 10% of the strain is taken as the tensile elastic modulus. In the measurement of the binding tape in the MD direction, the "width" of the test piece means the length in the TD direction, and the "length" means the length in the MD direction. Further, in the measurement of the binding tape in the TD direction, the "width" of the test piece means the length in the MD direction, and the "length" means the length in the TD direction.

In one embodiment, the ratio of the tensile modulus in the TD direction of the binding tape to the tensile modulus in the MD direction (the tensile modulus in the TD direction of the tape / the tensile modulus in the MD direction of the tape, hereinafter simply "TD /". "MD") is preferably 0.8 to 1.3, more preferably 0.9 to 1.2. When the ratio of the tensile elastic modulus of the binding tape is within the above range, the flexibility and the binding workability tend to be better.

[Manufacturing method of binding tape]
As a method for producing the binding tape according to the present invention, for example, a nonwoven fabric is formed by a spunbond method or a melt blow method using a fiber containing a fiber (A) containing a thermoplastic elastomer. Alternatively, a non-woven fabric composed of fibers containing the fiber (A) is prepared. When the nonwoven fabric includes a fused portion, a step of forming the fused portion by, for example, heat embossing may be included on the other surface of the nonwoven fabric.
Next, a resin film is formed by a sheet extrusion method, and a resin is laminated on the nonwoven fabric by a thermal laminating method on one surface of the nonwoven fabric to form a base material layer containing the nonwoven fabric and the resin layer. Then, the binding tape is manufactured by a method of directly applying the above-mentioned adhesive to the base material layer to form the pressure-sensitive adhesive layer, a method of transferring the pressure-sensitive adhesive once applied to another sheet to the base material layer, or the like. can do. When the base material layer is composed of a non-woven fabric and a resin layer, it is preferable that the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer is formed by directly applying the pressure-sensitive adhesive onto the resin layer.
Examples of the method of applying the adhesive to the base material layer or another sheet include a roll coating method, a spray coating method, a gravure coating method, a reverse coating method, a rod coating method, a bar coating method, a die coating method, a kiss coating method, and a reverse method. Examples include the kiss coat method and the air knife coat method.

[Use]
As described above, the binding tape of the present invention has high wear resistance, flexibility to bend electric wires, and is also excellent in binding workability. Therefore, it can be suitably used as a binding tape for electric wires and the like in automobiles in fields where these performances are required. As a matter of course, the use of the binding tape of the present embodiment is not limited to the binding use of electric wires and the like of automobiles.

Another more preferred embodiment of the binding tape of the present invention is a substrate layer comprising a nonwoven fabric made of fibers (A) containing a thermoplastic elastomer, a resin layer directly laminated on one surface of the nonwoven fabric, and an adhesive layer. A binding tape having a texture of 30 g / m ² or more and a laminated amount of the resin layer of 30 g / m ² or more. The thermoplastic elastomer preferably contains at least one selected from TPO, TPS, and TPU. Further, a fused portion may be provided on the other surface of the nonwoven fabric.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following description.

[Example 1]
(Creation of base material layer)
A sheet on one side of a urethane non-woven fabric (trade name: "Espancione (registered trademark)", manufactured by KB Salen Co., Ltd.) with a fiber diameter of 20 μm, a grain size of 100 g / m ² , and an apparent density of 0.33 g / m ³ . A PVC film extruded and formed by an extruder (T-die width 500 mm, φ40 mm extruder, manufactured by Tanabe Kikai Plastic Co., Ltd.) was laminated by a thermal laminating method to form a resin layer, and a base material layer was obtained. .. The laminated amount of the resin layer was 130 g / m ² . As the PVC constituting the resin layer, the PVC having the following composition was used.
(Composition of PVC resin)
PVC (homopolymer of vinyl chloride, average degree of polymerization 1300, product name: "TH-1300", manufactured by Taiyo PVC Co., Ltd.) 100 parts by mass, while DINP (manufactured by Jay Plus Co., Ltd.) 58 parts by mass, epoxidation Soybean oil (product name: "Chemisizer SNE-50", manufactured by Sanwa Synthetic Chemical Co., Ltd.) 2 parts by mass, Ca-Zn-Mg-based composite stabilizer (product name: "OW-5200", Sakai Chemical Industry Co., Ltd.) ), 2 parts by mass of calcium carbonate (product name: "Calcies (registered trademark) P", manufactured by Kamishima Chemical Industry Co., Ltd.) 28 parts by mass.

(Creation of binding tape)
Natural rubber latex (product name: "HA LATEX", manufactured by Reditex Co., Ltd.) 10 parts by mass (solid content), styrene-butadiene rubber latex (product name: "T-093A", manufactured by JSR Co., Ltd.) 40 parts by mass (Solid content), petroleum resin emulsion tackifier (product name: "AP-1100-NT", manufactured by Arakawa Chemical Industry Co., Ltd.) 50 parts by mass (solid content) are mixed to form a rubber adhesive emulsion. Prepared. Next, by the comma coater method, an adhesive layer was formed on the resin layer of the base material layer (that is, the surface on the side on which the non-woven fabric was not laminated) to obtain a binding tape. The laminated amount of the adhesive layer was 40 g / m ² . The total laminated amount of the obtained binding tape was 270 g / m ² , and the total thickness was 440 μm. Further, the tensile breaking strength of the binding tape in the MD direction was measured by the following method. The tensile breaking strength of the binding tape of Example 1 in the MD direction was 29 N / 10 mm.
(Tension breaking strength of binding tape in MD direction)
Under an environment of room temperature of 23 ° C. and relative humidity of 50% RH, the obtained binding tape was cut out with a width (length in the TD direction) of 19 mm and a length (length in the MD direction) of 200 mm to prepare a test piece. .. Next, after fixing the test piece by sandwiching it between the chucks of the tensile tester so that the distance between the chucks is 100 mm, the test piece is pulled at a speed of 300 mm / min, and the load until the test piece breaks is measured. The maximum value was taken as the tensile breaking strength.
In addition, the wear resistance, flexibility, binding workability, and tensile elastic modulus of the obtained binding tape were evaluated according to the following procedure. The results are shown in Table 1.

<Evaluation of wear resistance>
One layer of binding tape having a width of 19 mm and a length of 50 mm was attached in the longitudinal direction of a steel rod having a diameter of 10 mm. A piano wire with a diameter of 0.45 mm is brought into contact with the non-woven fabric side of the binding tape, a load of 7 N is applied under the conditions of 23 ° C. and a humidity of 50% RH, and the binding tape is 15.5 mm in the longitudinal direction at a speed of 60 times / minute. The distance was reciprocated. At this time, the piano wire scraped the binding tape, and the number of round trips until the binding tape penetrated was defined as the number of scrap wear resistance. In addition, the wear resistance was evaluated according to the following evaluation criteria, and B or higher was regarded as acceptable (has high wear resistance). In addition, in the following evaluation criteria, the binding tape of A evaluation (the number of times of scrap wear resistance is 1000 times or more) has the wear resistance of class D in the European automobile standard LV312.
(Evaluation criteria)
A: The scrap wear resistance is 1000 times or more.
B: The scrap wear resistance is 100 times or more and less than 1000 times.
C: The scrap wear resistance is less than 100 times.

<Evaluation of flexibility>
The three-point bending load of the test piece was measured according to JIS K7171 (2016) (ISO 178: 2010). Specifically, as shown in FIG. 3, seven thin-walled electric wires 200 (product name: "AVS050", manufactured by Sumitomo Wiring Systems Co., Ltd.) for automobiles having a diameter of 1 mm cut to a length of 300 mm are tied with a binding tape 100. A test piece X was prepared by winding in half a wrap. Next, a pushing jig connected to the load cell 400 was applied to the central portion of the test piece X supported by the support bases 300 arranged at 100 mm intervals, and the test piece X was pushed until the displacement amount became 30 mm, and the maximum load at that time was measured. The bending load was measured under the following measurement conditions. In addition, the flexibility was evaluated according to the following evaluation criteria, and B or higher was regarded as acceptable (excellent in flexibility).
(Measurement condition)
Measurement environment: temperature 23 ° C, humidity 50% RH
Test speed: 100 mm / min
(Evaluation criteria)
A: The 3-point bending load is less than 4.0N.
B: The 3-point bending load is 4.0 N or more and less than 5.0 N.
C: 3-point bending load is 5.0N or more.

<Evaluation of binding workability>
Prepare a roll-shaped binding tape wound 15 m on a 1.3-inch paper tube with a width of 19 mm, and bind seven thin-walled electric wires 200 for automobiles (product name: "AVS050", manufactured by Sumitomo Wiring Systems Co., Ltd.) with a diameter of 1 mm. The work of half-wrapping with tape was performed to evaluate the binding workability. In addition, the binding workability was evaluated according to the following evaluation criteria, and B or higher was regarded as acceptable (good binding workability).
(Evaluation criteria)
A: The binding tape did not stretch during the binding operation, and it was easy to bind the object.
B: The binding tape stretched a little during the binding work, but the object could be bound.
C: The binding tape stretched during the binding operation, making it difficult to bind the object.

<Tension elastic modulus in MD direction and TD direction of binding tape>
A binding tape test piece having a width of 19 mm and a length of 200 mm was prepared, sandwiched between chucks of a tensile tester so that the distance between chucks was 100 mm, and fixed. The test piece was pulled at a speed of 300 mm / min in an environment of room temperature of 23 ° C. and relative humidity of 50% RH, and tensile stress and strain were measured. The ratio of the tensile stress to the strain between 5 and 10% of the strain was calculated by linear regression and used as the tensile elastic modulus. In the measurement of the binding tape in the MD direction, the "width" of the test piece means the length in the TD direction, and the "length" means the length in the MD direction. Further, in the measurement of the binding tape in the TD direction, the "width" of the test piece means the length in the MD direction, and the "length" means the length in the TD direction.

[Examples 2 to 10]
A binding tape was prepared in the same manner as in Example 1 except that the configurations of the nonwoven fabric and the resin layer were as shown in Table 1. Further, for the binding tape of each example, the tensile breaking strength in the MD direction was measured by the same method as in Example 1. Further, the wear resistance, flexibility, binding workability, and tensile elastic modulus of the binding tape were evaluated by the same method as in Example 1. The results are shown in Table 1.

[Example 11]
A urethane non-woven fabric (trade name: "Espancione", manufactured by KB Salen Co., Ltd.) with a fiber diameter of 20 μm, a basis weight of 100 g / m ² , and an apparent density of 0.33 g / m ³ is embossed on the surface of the fused part. Formed. The shape of the fused portion was square, and its area was 2.8 mm ² . The fused portions were formed in a grid pattern on the surface of the nonwoven fabric. The total area of the fused portion with respect to the surface area of the nonwoven fabric (total area of the surface provided with the fused portion) was 69%.
Next, a resin layer was formed on the surface of the non-woven fabric on the side where the fused portion was not provided by the same method as in Example 1 to obtain a base material layer. The resin layer was made of the same PVC resin as in Example 1, and the laminated amount was 130 g / m ² . Then, an adhesive layer was formed in the same manner as in Example 1 to obtain a binding tape. The pressure-sensitive adhesive used was the same rubber-based pressure-sensitive adhesive as in Example 1, and the laminated amount of the pressure-sensitive adhesive layer was 40 g / m ² . The total laminated amount of the obtained binding tape was 270 g / m ² , and the total thickness was 440 μm. Further, the tensile breaking strength of the binding tape in the MD direction was measured by the same method as in Example 1. Further, the wear resistance, flexibility, binding workability, and tensile elastic modulus of the obtained binding tape were evaluated by the same method as in Example 1. The results are shown in Table 1.

[Comparative Example 1]
A binding tape was prepared by the same method as in Example 1 except that polyethylene terephthalate fibers were used as the fibers constituting the non-woven fabric. The tensile breaking strength of the obtained binding tape in the MD direction was measured by the same method as in Example 1. Further, the wear resistance, flexibility, binding workability, and tensile elastic modulus of the obtained binding tape were evaluated by the same method as in Example 1. The results are shown in Table 1.

[Comparative Example 2]
A binding tape was prepared in the same manner as in Example 1 except that the resin layer was not provided. The tensile breaking strength of the obtained binding tape in the MD direction was measured by the same method as in Example 1. Further, the wear resistance, flexibility, binding workability and tensile elastic modulus of the obtained binding tape were evaluated by the same method as in Example 1. The results are shown in Table 1.

In Table 1, "NR / SBR" means natural rubber (NR) and synthetic rubber (styrene-butadiene rubber (SBR)). As the pressure-sensitive adhesives (NR / SBR) of Examples 2 to 11 and Comparative Examples 1 and 2, the same pressure-sensitive adhesives used in Example 1 were used.
Further, in Table 1, "PET" means a polyethylene terephthalate fiber (fiber diameter 10 μm).
The same PVC resin as in Example 1 was used for "PVC" in Examples 2 to 9, 11 and Comparative Example 1. Further, as "TPO" of Example 8, "TPS" of Example 9, and "EVA" of Example 10, those having the following compositions were used.
(TPO)
A fiber having a fiber diameter of 20 μm, made of ethylene propylene diene rubber-dispersed polypropylene (TPO, trade name: “EXCELINK (registered trademark) 1300B”, manufactured by JSR Co., Ltd.), which is an olefin-based thermoplastic elastomer.
(TPS)
A fiber having a fiber diameter of 10 μm, which is a styrene-based thermoplastic elastomer styrene-ethylene-butylene-styrene block copolymer (SEBS) (TPS, trade name: "Tough Tech (registered trademark) H1043", manufactured by Asahi Kasei Corporation). ..
(EVA)
EVA resin with an ethylene content of 18% (Product name: "Denka EVA Tex (registered trademark)", manufactured by Denka Co., Ltd.).

As shown in Table 1, the binding tapes of Examples 1 to 11 satisfying the configuration of the present invention have high wear resistance, flexibility to bend electric wires, and good binding workability. there were. Furthermore, it was found that the binding tapes of Examples 3, 5 and 7 also had excellent wear resistance corresponding to Class D of the European automobile standard LV312. On the other hand, the binding tape of Comparative Example 1 provided with the non-woven fabric composed of the fiber (A) containing the thermoplastic elastomer had good wear resistance and binding workability, but had low flexibility. Further, although the binding tape of Comparative Example 2 in which the base material layer does not contain the resin layer had good flexibility, the tape stretched too much during the binding operation, and it was difficult to bind the object. The wear resistance was also low. From the above results, it was confirmed that the binding tape of the present invention has high wear resistance, flexibility to bend electric wires, and is also excellent in binding workability.

1: Fused part 10: Non-woven fabric 20: Resin layer 30: Adhesive layer 40: Base material layer 100: Bundling tape 200: Electric wire 300: Support base 400: Load cell

Claims

A binding tape having a base material layer including a non-woven fabric containing a fiber (A) containing a thermoplastic elastomer, a resin layer laminated on one surface of the non-woven fabric, and an adhesive layer.
The binding tape according to claim 1, wherein the nonwoven fabric has a basis weight of 20 to 350 g / m 2 .
The binding tape according to claim 1 or 2, wherein the laminated amount of the resin layer is 20 to 350 g / m 2 .
The binding tape according to any one of claims 1 to 3, wherein the thermoplastic elastomer comprises at least one selected from an olefin-based thermoplastic elastomer, a urethane-based thermoplastic elastomer, and a styrene-based thermoplastic elastomer.
The binding tape according to any one of claims 1 to 4, wherein the resin layer contains at least one resin selected from polyvinyl chloride and an ethylene-vinyl acetate copolymer.
The binding tape according to any one of claims 1 to 5, wherein the nonwoven fabric has a fused portion.
The fused portion is provided on the other surface on which the resin layer of the nonwoven fabric is not laminated, and the ratio of the total area of the fused portions is relative to the total area of the other surface of the nonwoven fabric. The binding tape according to claim 6, which is 20 to 80%.
The binding tape according to any one of claims 1 to 7, wherein the tensile breaking strength in the longitudinal direction of the binding tape is 20 N / 10 mm or more.
The binding tape according to any one of claims 1 to 8, which is used for binding electric wires and the like.