JP5902582B2 - Binding tape - Google Patents

Description

  The present invention relates to a binding tape for binding electric wires, wirings, and the like.

  Conventionally, when bundling various electric wires such as electric wires for automobiles (wire harnesses for automobiles, etc.) and cables such as power line cables and communication cables, from the viewpoint of heat resistance and weather resistance, Adhesive tapes mainly composed of polyvinyl chloride are widely known. However, the adhesive tape whose substrate is made of polyvinyl chloride has a problem in flame retardancy and the like.

  Thus, for example, in Patent Document 1, an adhesive layer is provided on one side of a base material made of a nonwoven fabric having small through holes provided on the entire surface in order to provide an inexpensive adhesive tape for binding a wire harness that is excellent in flame retardancy and the like. An adhesive tape is disclosed in which a resin layer is provided on the surface of the substrate opposite to the surface on which the adhesive layer is provided, and a release agent layer is further provided thereon.

Japanese Patent Laid-Open No. 11-335637

  However, in the above-described prior art, a normal adhesive layer is provided on one side, and the adhesive layer sticks to a cable or the like, so that workability is poor. Once an adhesive tape has been attached to a cable, etc., it must be removed and aligned again.However, it is troublesome to remove the adhesive layer, and repeating the same operation is troublesome. The Even when there is silica paper so that it does not stick to the adhesive layer, it takes time to peel off the silica paper when binding, and the workability becomes poor. Further, when the wire harness is passed through the hole of the vehicle body, it is possible to assume friction with the hole, and the tape that binds these needs to have wear resistance.

The present invention has been made in view of the above problems, it is an object of the present invention is to provide an excellent binding tape to work and wear resistance.

In order to solve the above problems, a cushioning material layer made of polypropylene foam or polyurethane foam , a film layer on one surface of the cushioning material layer, and a self-adhesive adhesive on the other surface of the cushioning material layer comprising a material layer, and the film layer, Ri laminate der stretched film and non-oriented film, binding tape in which the unstretched film is disposed on the buffer material layer side is provided.
According to this, the bundling tape excellent in wear resistance can be provided by sandwiching the non-stretched film between the stretched film and the cushioning material and positioning the stretched film on the exterior surface .

As described above, according to the present invention, it is possible to provide excellent binding tape to work and wear resistance.

Sectional drawing of the binding tape which concerns on this invention.

The present invention is described in detail below.
The film layer in the present invention can be used without particular limitation as long as the material is a stretchable resin. For example, polyethylene, polyamide, polypropylene, polyethylene terephthalate, or the like can be used as the material for the film layer. Moreover, it produces by well-known manufacturing methods, such as a T-die method and an inflation method.

  The film layer is a laminate of a stretched film and an unstretched film. In addition, since a stretched film does not have directionality, a biaxially stretched film is preferable. Thereby, since it is excellent in tensile strength and tearing strength, and a soft touch can be obtained, a film layer having high wear resistance and easy conformability can be obtained.

  The lamination method is not particularly limited, and is a known method such as wet lamination (using a water-based adhesive or water-dispersed adhesive), dry lamination (solvent-based adhesive or reactive adhesive), hot melt lamination ( A laminating method using an adhesive such as a hot melt adhesive) or an extrusion laminating method may be used.

  The film layer is a laminate in which a stretched polypropylene film and an unstretched film are dry-laminated, and the unstretched film is preferably disposed on the buffer material layer side. According to this, abrasion resistance becomes favorable by positioning a stretched film in an exterior surface. Moreover, it becomes what was excellent in the workability | operativity at the time of binding by pinching an unstretched film between a stretched film and a buffer material.

  The buffer material layer is a sheet-like material that is formed into a foamed or porous shape by finely dispersing bubbles in a synthetic resin. The synthetic resin used as the raw material is not particularly limited, and examples thereof include polyolefin (mainly polyethylene (PE) and polypropylene (PP)), polyurethane (PUR), and polystyrene (PS). The buffer material is preferably a polypropylene foam or a polyurethane foam. This is because mass production is possible and cost merit is obtained.

  The buffer material layer is composed of a known sheet-like foam. For example, when the synthetic resin is polyethylene, the polyethylene pellets are provided with a foaming agent and a crosslinking agent, and if necessary, a polyfunctional monomer, a colorant and / or a filler. After the mixture is formed into a predetermined shape, crosslinking is carried out by heating at a temperature below the decomposition temperature of the foaming agent or irradiation of the foaming agent, and then heating above the decomposition temperature of the foaming agent to foam. can get. Or you may perform the said bridge | crosslinking and foaming simultaneously, and obtain a foam.

  The expansion ratio of the sheet-like foam obtained as described above is in the range of 2 to 100 times, preferably 10 to 30 times. About thickness, 0.5-6 mm, Preferably it is 1.5-3.0 mm, More preferably, the range of 2-3 mm is preferable. If the expansion ratio is less than 2 times or the thickness is less than 0.5 mm, the foam layer is thin and inferior in cushioning properties, and workability and handling properties are deteriorated. When the expansion ratio exceeds 100 times or the thickness exceeds 6 mm, the winding diameter becomes thick and the workability is inferior. Moreover, moldability and mass productivity are reduced.

  As for the cell structure of the sheet-like foam, open cells are preferred, and a foam that has been blended and adjusted to become open cells immediately after foam molding, or a sheet of closed cell structure immediately after foam molding is crushed with a calender roll or the like. Then, it may be an open cell. Since it is open-celled, it becomes easy to compress, and it is excellent in winding property and workability.

  Adhesive layer is made of natural rubber latex as base resin, tackifier, terpene resin, rosin ester resin, petroleum resin (aliphatic or aromatic) as tackifier (tackifier), etc. It is made of a pressure-sensitive adhesive composed of a phenolic antioxidant as an antioxidant and an organic solvent such as toluene as a solvent.

  The pressure-sensitive adhesive has self-adhesiveness. Self-adhesive means that two adhesive layers of the same material are overlapped and pressed lightly to give the appearance that the two same materials are adhered, have an appropriate peeling force, and have some shearing force. This is a phenomenon that cannot be separated by a certain force.

  The pressure-sensitive adhesive is stirred for about 30 minutes each in the forward / reverse direction at a speed of about 4500 rotations / minute after charging the adhesion assistant in the homomixer tank. Thereafter, a predetermined amount of natural rubber latex is blended to obtain an adhesive.

  The binding tape according to the present invention includes the buffer material layer, the film layer on one surface of the buffer material layer, and the pressure-sensitive adhesive layer having self-adhesiveness on the other surface of the buffer material layer. It is a binding tape. That is, it consists of three layers: a film layer, a buffer material layer, and an adhesive layer. When folded to bind cables and the like with the adhesive layer on the inside, the outermost layer is the film layer, the intermediate layer is the buffer material layer, and the innermost layer. It is a binding tape that becomes an adhesive layer. According to this, in addition to flame retardancy, a binding tape excellent in workability and wear resistance can be provided.

  FIG. 1 is a cross-sectional view of a binding tape 1 according to an embodiment of the present invention. The binding tape 1 includes a buffer material layer 3 in an intermediate layer, a film layer 2 on one surface (upper surface) of the buffer material layer 3, and an adhesive layer 4 on the other surface (lower surface).

  In addition, the buffer material layer 3 and the film layer 2 are produced by well-known manufacturing methods, such as various lamination construction methods. Specifically, there are an adhesive lamination method, a flame welding method and the like. Thereafter, a pressure-sensitive adhesive to be the pressure-sensitive adhesive layer 4 is applied to the buffer material layer 3 side using a known laminator or applicator, but is not particularly limited.

  In addition, it is preferable that a polyolefin-type emulsion is included as an additive of an adhesive. A polyolefin-based emulsion is obtained by dispersing polyolefin resin particles in water using an emulsifier or a dispersant. Use of the aqueous dispersion is more preferable because the thickness of the pressure-sensitive adhesive layer can be reduced and the flexible sheet-like foam can be easily followed.

  Polyolefin-based emulsions are produced by various known methods. For example, it may be produced by emulsion polymerization in the presence of an emulsifier in an aqueous medium, or may be produced by stirring and mixing a molten resin and an aqueous medium in the presence of a shearing force. Specific examples of commercially available polyolefin emulsions include, for example, Chemipearls A100, V100, V200, V300, W100, W200, S100, S650, S75N, etc. manufactured by Mitsui Chemicals, Hitech S3121, S8512 manufactured by Toho Chemical Co., Ltd. Can be mentioned.

  When the cable 1 or the like is bundled, the binding tape 1 has the film layer 2 as the outermost layer, particularly the stretched film layer, as the outermost layer, so that the wear resistance and the scrape wear property are improved. Further, since the buffer layer is provided in the intermediate layer, the wear resistance and tape wear resistance are improved by the cushioning property of the foam. Further, since the innermost layer in contact with the cable or the like is provided with an adhesive layer having self-adhesiveness, the workability is excellent without sticking to the cable or the like. That is, even if the binding tape 1 of this embodiment is wound around a cable or the like and then the cable is assembled to a vehicle or the like, the binding tape can be freely displaced like a sheath with respect to the cable. There is no loss of workability.

Hereinafter, examples and comparative examples shown in Table 1 will be described in more detail.
<Example 1>
The film layer is a laminate (PP (OPP # 50 / DL / CPP # 50) film (manufactured by Toppan Printing Co., Ltd.)) obtained by DL (dry lamination) of OPP (biaxially oriented polypropylene) and CPP (unstretched polypropylene). Each of the thicknesses is 50 μm The sheet-like foam of the buffer layer is a polypropylene foam (Microfoam (registered trademark), MF 090 3/32, manufactured by Pregis) having a thickness of 2.4 mm. The pressure-sensitive adhesive layer is a self-adhesive pressure-sensitive adhesive (Clonel, PC100 3 / 32〃 PP-SC, manufactured by INOAC).
Based on the evaluation method described later, flame retardancy was x (impossible), tape wear was ◎ (excellent), and scrape wear was ◎ (excellent). Although the evaluation for flame retardancy was not good, the results were generally good for other evaluation items. Moreover, it was confirmed that the workability was excellent because the tapes could be bonded together without sticking to the cable.

<Example 2>
The film layer is a laminate obtained by dry laminating (DL) two sheets of PET (polyethylene terephthalate, stretched PET # 25 / DL / unstretched PET # 25, Toppan Printing Co., Ltd.). Each thickness is 25 μm. The buffer material layer and the pressure-sensitive adhesive layer are the same as those in Example 1.
Flame retardancy was x (impossible), tape wear was ◎ (excellent), and scrape wear was ◎ (excellent). Although the evaluation for flame retardancy was not good, the results were generally good for other evaluation items. Moreover, it was confirmed that the workability was excellent because the tapes could be bonded together without sticking to the cable.

<Example 3>
The sheet-like foam of the buffer material layer is a flame retardant polyurethane foam (ESH-4, thickness: 3.0 mm, manufactured by INOAC) having a thickness of 3/32 inches. The film layer and the pressure-sensitive adhesive layer are the same as those in Example 1.
Flame retardancy was ◎ (excellent), tape wear was ◎ (excellent), scrape wear was ◎ (excellent), and workability was ○ (good). In all evaluation items, good results were obtained. Moreover, it was confirmed that the workability was excellent because the tapes could be bonded together without sticking to the cable.

<Example 4>
The film layer is a laminate obtained by dry laminating two sheets of PET (polyethylene terephthalate, stretched PET # 25 / DL / unstretched PET # 25, Toppan Printing Co., Ltd.). Each thickness is 25 μm. The buffer material layer and the pressure-sensitive adhesive layer are the same as those in Example 3.
Flame retardancy was ◎ (excellent), tape wear was ◎ (excellent), and scrape wear was ◎ (excellent). In all evaluation items, good results were obtained. Moreover, it was confirmed that the workability was excellent because the tapes could be bonded together without sticking to the cable.

<Comparative Example 1>
Generally, it is a vinyl tape (vinyl tape, HF-117-A, Kyowa Co., Ltd.) used for binding cables and the like.
Flame retardancy was ◎ (excellent), tape wear was ○ (good), and scrape wear was x (impossible). It is inferior to workability. In the case of vinyl tape, once it has been stuck to an inappropriate place, it has to be stuck again, which may take time and effort.

<Comparative Example 2>
It is generally called a soft tape (Eptosea, manufactured by Nitto Denko Corporation) in which a double-sided tape is bonded to one side of urethane (ECS).
Flame retardancy was x (impossible), tape wear was x (impossible), and scrape wear was x (impossible). In order to use soft tape, it was necessary to remove the release paper, which took time. In addition, reattachment in the case of sticking to an inappropriate place is more complicated than vinyl tape and may take time and effort.

<Comparative Example 3>
It is a twist tube (twist tube, manufactured by Eastfield) in which PET is wrapped around the surface of the nonwoven fabric. (Specifically, refer to JP 2009-254076, paragraph 30).
Flame retardancy was ◎ (excellent), tape wear was ○ (good), and scrape wear was x (impossible).

<Comparative example 4>
The surface is a non-woven fabric, and a polypropylene foam (Microfoam (registered trademark), MF 090 3/32 mm, manufactured by Pregis) is bonded to the lower layer, and a self-adhesive pressure-sensitive adhesive (Clonel, PC030 1 / 16 "NW-2, manufactured by Inoac Corporation).
Flame retardancy was x (impossible), tape wear was x (impossible), and scrape wear was x (impossible).

<Contrast of Examples and Comparative Examples>
When comparing the example and the comparative example, the example clearly has superior wear resistance which is essential when passing through the hole of the vehicle body. In Examples 1 and 2, the evaluation of flame retardancy is not good, but since the wear resistance is excellent, it can be used in places other than the place where the temperature is high, such as around the engine.

<Evaluation method>
The flame retardancy test is based on FMVSS 302 (Federal Motor Vehicle safety Standards No. 302).
In addition, the code | symbol "x" in a table | surface means the case where it does not self-extinguish: Combustion speed between rating lines of 100 mm / min or more, When self-extinguishing: Combustion distance 50 mm or more, or combustion time 60 seconds or more. The symbol “◎” means that the self-extinguishing is not performed: the burning speed between the evaluation lines is 100 mm / min or less, and the self-extinguishing is: the burning distance is within 50 mm and the burning time is within 60 seconds.
Tape wear is based on JIS C3406 / ISO 6722 (low voltage electric wire for automobiles).
The symbol “x” in the table means that the minimum wear resistance value is 200 mm or less. The symbol “◯” means that the minimum wear resistance value is 200 mm or more and 500 mm or less, and the symbol “◎” means that the minimum wear resistance value is 500 mm or more.
The scrape wear test is based on ISO 6722 (high heat resistant electric wire for automobiles). The symbol “x” in the table means 400 times or less, and the symbol “◎” in the table means 1000 times or more.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible.

DESCRIPTION OF SYMBOLS 1 Binding tape 2 Film layer 3 Buffer material layer 4 Adhesive layer

Claims (2)

A cushioning material layer made of polypropylene foam ,
A film layer on one surface of the buffer layer;
A pressure-sensitive adhesive layer having self-adhesiveness on the other surface of the buffer material layer;
With
The film layer, Ri laminate der stretched film and non-oriented film, the unstretched film is disposed on the buffer material layer side,
Binding tape. A cushioning material layer made of polyurethane foam ,
A film layer on one surface of the buffer layer;
A pressure-sensitive adhesive layer having self-adhesiveness on the other surface of the buffer material layer;
With
The film layer, Ri laminate der stretched film and non-oriented film, the unstretched film is disposed on the buffer material layer side,
Binding tape.