JP2018016721A - Binding tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binding tape which is used for binding wiring such as a communication cable or various wires such as an automobile wire (such as an automobile wire harness) and is high in peel strength of which a layer of a surface hardly peels even at high temperature.SOLUTION: A binding tape has a constitution having a buffer material layer 11A consisting of an olefin resin expanded material, a protective layer 21A consisting of an olefin resin or an olefin thermoplastic elastomer directly laminated on a surface of the buffer material layer 11A and an adhesive layer 31A having a self adhesiveness laminated on another surface of the buffer material layer 21A, and layers and binds the adhesive layer 31A each other by folding cables or the like with setting the adhesive layer 31A as inside and sandwiching from outside.SELECTED DRAWING: Figure 1

Description

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

Conventionally, a binding tape has been used for binding various wires such as wiring of communication cables and the like, and electric wires for automobiles (wire harnesses for automobiles, etc.).
As a binding tape, a film layer is laminated on one surface of the buffer material layer with a hot melt adhesive and the like, and a pressure-sensitive adhesive layer is applied on the other surface of the buffer material layer to form a three-layer structure. In addition, there is a binding tape that is folded so that a cable or the like is sandwiched with the pressure-sensitive adhesive layer inside, and the pressure-sensitive adhesive layers are overlapped and bonded together (Patent Document 1).

  However, the three-layered binding tape in which the film layer is laminated on one surface of the buffer material layer with a hot melt adhesive or the like, the surface film layer becomes a buffer material when the ambient temperature rises to about 80 ° C. in a bent state. There were cases where the layer partially peeled off.

JP, 2014-31432, A

  The present invention has been made in view of the above points, and an object of the present invention is to provide a binding tape having a high peel strength in which a surface layer hardly peels off even at high temperatures.

  The invention according to claim 1 includes a buffer layer made of an olefin resin foam, a protective layer made of an olefin resin or an olefin thermoplastic elastomer directly laminated on one surface of the buffer layer, and the buffer layer It has a self-adhesive pressure-sensitive adhesive layer laminated on the other surface.

  The invention of claim 2 is characterized in that in claim 1, it has a film layer directly laminated on the surface of the protective layer.

  The invention of claim 3 is characterized in that, in claim 2, the film layer comprises a laminate of a stretched film and an unstretched film, and the stretched film is on the outside.

  According to the present invention, since it has a protective layer made of an olefin resin or an olefin thermoplastic elastomer directly laminated on one surface of the buffer material layer made of an olefin resin foam, the adhesive strength between the protective layer and the buffer material layer is High and the peel strength of the protective layer at high temperatures is high. Moreover, when it has a film layer laminated directly on the surface of the protective layer, the adhesive strength between the buffer layer and the protective layer and the adhesive strength between the protective layer and the film layer are high, and the peel strength of the film layer at high temperature is high. Become.

It is sectional drawing of the binding tape which concerns on 1st Embodiment of this invention. It is sectional drawing of the binding tape which concerns on 2nd Embodiment of this invention.

  The binding tape 10A of the first embodiment shown in FIG. 1 is formed in a tape shape with a predetermined width, and includes a buffer material layer 11A, a protective layer 21A on one surface of the buffer material layer 11A, and the other surface of the buffer material layer 11A. And an adhesive layer 31A.

  The buffer material layer 11A is composed of an olefin resin foam. Examples of the olefin resin foam include polyethylene foam and polypropylene foam.

  The olefin resin foam constituting the buffer layer 11A has an expansion ratio of 5 to 100 times, preferably 10 to 50 times, and a thickness of 0.5 to 6 mm, preferably 0.6 to 4 mm. More preferably, it is 0.7-3 mm. When the expansion ratio is less than 5 times or the thickness is less than 0.5 mm, the buffering property is inferior, the binding property when the binding tape 10 is wound around a cable or the like is inferior, and the workability is deteriorated. On the other hand, if the expansion ratio exceeds 100 times or the thickness exceeds 6 mm, the workability at the time of bundling is deteriorated, or the diameter of the bundling tape 10 when it is wound around a cable or the like becomes too large. It becomes.

  The olefin resin foam constituting the buffer material layer 11A preferably has an open cell structure. With the open cell structure, the buffer material layer 11A is easily compressed and deformed, and the workability when the binding tape 10A is wound around a cable or the like is improved. The open cell structure can be either an open cell by blending, or a foam formed with a closed cell structure can be crushed with a calender roll or the like to break (rupture) the closed cell to have an open cell structure. But you can.

  The protective layer 21A is made of an olefin resin or an olefin thermoplastic elastomer that is directly laminated on one surface of the buffer material layer 11A without using an adhesive such as a hot melt adhesive. The direct lamination of the protective layer 21A can be performed by a known direct lamination or single lamination in extrusion lamination. Direct lamination or extrusion lamination (single lamination) of the protective layer 21A is performed on an olefin resin foam sheet unwound from a roll around which the olefin resin foam sheet constituting the buffer material layer 11A is wound. It is carried out by extruding an olefin resin or olefin thermoplastic elastomer from an extruder and unwinding it through a cooling roll.

  Adhesion of the olefin resin or olefin thermoplastic elastomer to the buffer material layer 11A is performed by adhesion when the olefin resin or olefin thermoplastic elastomer directly laminated on the buffer material layer 11A is cured. Yes. By forming the protective layer 21A from an olefin-based resin or an olefin-based thermoplastic elastomer laminated directly on one surface of the buffer material layer 11A, the adhesive strength between the protective layer 21A and the buffer material layer 11A is increased. The peel strength of the protective layer 21A at a high temperature is increased.

Examples of the olefin resin constituting the protective layer 21A include polypropylene and polyethylene.
The olefinic thermoplastic elastomer constituting the protective layer 21A has a hard segment made of polyolefin such as polypropylene (PP) or polyethylene (PE), and a soft component made of a rubber component such as ethylene-propylene rubber (EPM, EPDM). It is a thermoplastic elastomer and has elasticity at room temperature.

  The thickness of the protective layer 21A is preferably 60 to 300 μm, more preferably 100 to 200 μm. When the thickness is less than 60 μm, it is too thin to obtain a function as a protective layer. On the other hand, if it exceeds 300 μm, it is too thick and it becomes difficult to wind the binding tape 10A around a cable or the like during the binding operation.

  The pressure-sensitive adhesive layer 31A is composed of a self-adhesive pressure-sensitive adhesive. Self-adhesive refers to the property of exhibiting adhesiveness for the same adhesive and not exhibiting adhesiveness for different partners. In the case of a pressure-sensitive adhesive having self-adhesiveness, the same pressure-sensitive adhesives are stacked and lightly pressed to adhere to each other, and an appropriate peeling force is required for peeling. The self-adhesive pressure-sensitive adhesive is constituted by blending a natural rubber latex with an adhesion assistant. Adhesion aids include terpene resins, rosin ester resins, petroleum resins (fatty acids, fragrances), etc. as tackifiers (tackifiers), phenolic antioxidants as antioxidants, and solvents And organic solvents such as toluene.

  The pressure-sensitive adhesive preferably contains a polyolefin emulsion as an additive. A polyolefin-based emulsion is obtained by dispersing polyolefin resin particles in water using an emulsifier and a dispersant. By using the aqueous dispersion, the thickness of the pressure-sensitive adhesive layer 31A can be reduced, the flexibility of the binding tape 10A can be increased, and the binding workability can be improved. The polyolefin emulsion may be produced by various known production methods or may be a commercially available product. Known production methods include, for example, emulsion polymerization in the presence of an emulsifier in an aqueous medium, and stirring and mixing a molten resin and an aqueous medium in the presence of a shearing force.

  The production of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 31A is carried out by charging the pressure-sensitive adhesive and the like into the homomixer tank, and then performing forward rotation and reverse rotation for about 30 minutes at a rotation speed of about 4500 rotations / minute, Thereafter, a predetermined amount of natural rubber latex is blended. Although the adhesion thickness (thickness of an adhesive layer) with respect to the said buffer material layer 11A of the said adhesive is not specifically limited, About 10-50 micrometers is preferable.

  The binding tape 10A is manufactured by directly laminating the protective layer 21A on one surface of the buffer material layer 11A by direct lamination or extrusion lamination (single laminate), and then applying the adhesive on the other surface of the buffer material layer 11A. The pressure-sensitive adhesive layer 31A can be formed by coating using a known laminator or applicator.

  The binding tape 10B according to the second embodiment shown in FIG. 2 has a tape shape with a predetermined width, and includes a buffer layer 11B, a protective layer 21B on one side of the buffer layer 11B, and a film layer on the surface of the protective layer 21B. 210B and the pressure-sensitive adhesive layer 31B on the other surface of the buffer material layer 11B.

  The buffer material layer 11B is made of an olefin resin foam and has the same material and thickness as the buffer material layer 11A of the first embodiment.

  The protective layer 21B is made of an olefin-based resin or an olefin-based thermoplastic elastomer that is directly laminated on one surface of the buffer material layer 11B without using an adhesive such as a hot-melt adhesive. The direct lamination of the protective layer 21B is performed by sandwich lamination in a known extrusion laminate. An extrusion laminate (sandwich laminate) of the protective layer 21B includes an olefin resin foam sheet unwound from a roll around which the olefin resin foam sheet constituting the buffer material layer 11B is wound, and the film layer 210B. An olefin resin or an olefin thermoplastic elastomer is extruded from an extruder between the film and a film wound with a roll on which the film constituting the olefin resin is wound, and the olefin resin between the sheet of the olefin resin foam and the film Alternatively, it is carried out by unwinding through a cooling roll with the olefinic thermoplastic elastomer sandwiched therebetween.

  The adhesion of the olefinic resin or olefinic thermoplastic elastomer constituting the protective layer 21B to the buffer material layer 11B and the adhesion between the protective layer 21B and the film layer 210B are the olefinic resin constituting the protective layer 21B or This is done by the adhesiveness when the olefinic thermoplastic elastomer is cured.

  By forming the protective layer 21B from an olefin resin or an olefin thermoplastic elastomer directly laminated on one surface of the buffer material layer 11B, the adhesive strength between the protective layer 21B and the buffer material layer 11A is increased. The peel strength of the protective layer 21B at a high temperature is increased.

  The olefin resin and olefin thermoplastic elastomer constituting the protective layer 21B are the same as the olefin resin and olefin thermoplastic elastomer constituting the protective layer 21A of the second embodiment.

  Since the protective layer 21B has the film layer 210B on the surface, it is preferable to make the thickness thinner than the protective layer 21A of the first embodiment so as not to impair the flexibility of the binding tape 10B during the binding operation. . Specifically, the thickness of the protective layer 21B is preferably 10 to 50 μm, more preferably 12 to 40 μm. When the thickness is less than 10 μm, it is too thin to obtain a function as a protective layer. On the other hand, if it exceeds 50 μm, it is too thick and it becomes difficult to wind the binding tape 10B around a cable or the like during the binding operation.

  The film layer 210B is directly laminated on the surface of the protective layer 21B without using an adhesive such as a hot melt adhesive. The olefin resin or olefin thermoplastic elastomer constituting the protective layer 21B is directly laminated on the buffer material layer 11B, and the film layer is formed on the olefin resin or olefin thermoplastic elastomer constituting the protective layer 21B. With the configuration in which 210B is directly laminated, the adhesive strength of the protective layer 21B to the buffer material layer 11A and the adhesive strength of the film layer 210B to the protective layer 21B are increased, thereby the film layer 210B at a high temperature. The peel strength of is increased.

  The material of the film layer 210B is not particularly limited, and examples thereof include polyethylene, polypropylene, polyamide, and polyethylene terephthalate. The film constituting the film layer 210B is manufactured by a known film forming method such as a T-die method or a ring die method (inflation method).

  The film layer 210B is preferably a laminate of a stretched film and an unstretched film. By using a laminate of a stretched film and an unstretched film, a film layer having excellent tensile strength and tear strength and a soft feel can be obtained, and wear resistance is high. Moreover, it is preferable to make a stretched film outside and an unstretched film inside (protective layer 21B side). Thereby, the outer wear resistance is improved and the bundling workability is improved. The stretched film is more preferably a biaxially stretched film from the viewpoint of improving strength and wear resistance.

  The method for laminating the stretched film and the non-stretched film is not limited, and wet lamination (using a water-based adhesive or water-dispersed adhesive), dry lamination (solvent-based adhesive or reactive adhesive), hot melt lamination ( It may be a laminate using an adhesive such as a hot melt adhesive) or an extrusion laminate.

  The pressure-sensitive adhesive layer 31B is composed of a self-adhesive pressure-sensitive adhesive, and is the same as the pressure-sensitive adhesive layer 31A of the first embodiment.

  The binding tape 10B is manufactured by directly laminating the protective layer 21B and the film layer 210B on one surface of the buffer material layer 11B by extrusion lamination (sandwich laminate), and then on the other surface of the buffer material layer 11B. The adhesive can be applied by using a known laminator or applicator to form the pressure-sensitive adhesive layer 31B.

  The binding tapes 10A and 10B can be used for connecting cables such as communication cables and various electric wires such as automobile wires (automobile wire harnesses) with the adhesive layers 31A and 31B inside. Folded so as to be sandwiched from the outside, the pressure-sensitive adhesive layers 31A and 31B are overlapped and lightly pressed.

  The binding tapes 10A and 10B have good wear resistance due to the outer protective layer 21A or the film layer 210B on the surface of the protective layer 21B, and the cushioning layers 11A and 11B serving as intermediate layers bind together. The cable and the like are protected and the bundling workability is improved. Further, since the pressure-sensitive adhesive layers 31A and 31B which are the innermost surfaces in contact with the cables and the like have self-adhesive properties, they do not stick to the cables or the like at the time of bundling work and the bundling work is easy, and after bundling Since the adhesive layers 31A and 31B are not adhered to the cable or the like, the binding tapes 10A and 10B can be shifted on the cable in the binding state, and the binding position can be adjusted.

  Further, in the binding tape 10A of the first embodiment, the protective layer 21A on the outer surface is directly laminated (direct laminated or extrusion laminated) on the buffer material layer 11A, so that the protective layer 21A and the buffer material layer 11A The adhesive strength is high, and the peel strength of the protective layer 21A at high temperatures is high.

  In the binding tape 10B of the second embodiment, the protective layer 21B is directly laminated (extruded laminate) on the buffer material layer 11A, and the film layer 210B is directly laminated (extruded laminate) on the surface of the protective layer 21B. Therefore, the adhesive strength between the buffer material layer 11B and the protective layer 21B and the adhesive strength between the protective layer 21B and the film layer 210B are high, and the peel strength of the film layer 210B at high temperatures is high.

Example 1
Example 1 is an example of the first embodiment having no film layer on the surface of the protective layer. The protective layer has PP (polypropylene resin), deflection temperature under load: about 110 ° C. (JIS K6921-2), and a thickness of 150 μm. The buffer material layer is made of PP (polypropylene foam), open cells, expansion ratio 20 times, thickness 1.8 mm, product number: FOLEC LZ-2000, manufactured by Inoac Corporation. The pressure-sensitive adhesive layer is a self-adhesive pressure-sensitive adhesive (product number: Inotac, manufactured by Inoac Corporation), and has a thickness of 20 μm.

Example 2
Example 2 is an example of the first embodiment having no film layer on the surface of the protective layer. The protective layer has TPO (olefin-based thermoplastic elastomer), deflection temperature under load: about 100 ° C. (JIS K6921-2), and a thickness of 150 μm. The buffer material layer and the pressure-sensitive adhesive layer are the same as in Example 1.

Example 3
Example 3 is an example of the second embodiment having a film layer directly laminated on the surface (outer surface) of the protective layer. The protective layer has PP (polypropylene resin), deflection temperature under load: about 110 ° C. (JIS K6921-2), and a thickness of 15 μm. The film layer is a laminate (OPP # 50 / DL / CPP # 50) film (manufactured by Toppan Printing Co., Ltd.) obtained by dry laminating (DL) OPP (biaxially oriented polypropylene) and CPP (unstretched polypropylene), and has a thickness of 100 μm. CPP (unstretched polypropylene) was used as the buffer material layer side. The buffer material layer and the pressure-sensitive adhesive layer are the same as in Example 1.

Example 4
Example 4 is an example of the second embodiment having a film layer directly laminated on the surface (outer surface) of the protective layer. In the example in which the buffer material layer is PE (polyethylene foam), open cells, expansion ratio is 30 times, thickness is 2.0 mm, product number: PE Lite LH3002, manufactured by Inoac Corporation, and other configurations are the same as in Example 3. is there.

Example 5
Example 5 is an example of the second embodiment having a film layer directly laminated on the surface (outer surface) of the protective layer. The film layer is a laminate (stretched PET # 25 / DL / CPP # 50) film (manufactured by Toppan Printing Co., Ltd.), thickness obtained by dry laminating (DL) stretched PET (biaxially stretched polyethylene terephthalate) and CPP (unstretched polypropylene). The thickness was 75 μm, and CPP (unstretched polypropylene) was the buffer material layer side. Other configurations are the same as those of the third embodiment.

Comparative example 1
Comparative Example 1 uses an olefinic hot-melt adhesive (HM-1) as a protective layer of Example 3 and a softening point of about 96 ° C. (JAI-7 (ring ball method)). This is an example in which the same laminate film as in Example 3 was laminated and adhered to one surface of the buffer material layer with a thickness of 35 μm. Other configurations are the same as those of the third embodiment.

Comparative example 2
Comparative Example 2 uses the modified olefinic hot melt adhesive (HM-2), softening point: about 157 ° C. (JAI-7 (ring ball method)) as the protective layer of Comparative Example 1, and the modified olefinic hot melt adhesive. This is an example in which the same laminate film as in Example 3 was laminated and adhered after coating the agent on one surface of the buffer material layer with a thickness of 35 μm. Other configurations are the same as those in Example 3 and Comparative Example 1.

  About Examples 1-5 and Comparative Examples 1 and 2, tape abrasion, heat-resistant laminating property, and heat-resistant peel strength were measured. The measurement results are shown in Table 1. In the overall evaluation of Table 1, the overall evaluation was “［” when all the results were [◯], and the overall evaluation was [×] when there was at least “×”.

  Tape wear is JASO D608-92, heat-resistant low-voltage electric wire for automobiles 5.12. (1) It measured based on the abrasion tape method. The evaluation was “◯” when the measurement result was 3000 mm or more, and “X” when the measurement result was less than 3000 mm.

  The heat-resistant laminating property was measured by folding the binding tape of each example and each comparative example 180 degrees with the adhesive layer inside, and self-adhering the adhesive layers by overlapping them, and then a paper tube having a diameter of 3 inches. After 120 hours had passed under an atmosphere of 80 ° C., it was confirmed whether or not there was any peeling between the buffer material layer and the protective layer. The evaluation was “◯” when there was no peeling, and [×] when there was peeling.

  The heat-resistant peel strength was prepared by preparing three test pieces with a width of 25 mm and a length of 125 mm (N = 3), using an T-type peel test device at an ambient temperature of 80 ° C., a test speed of 300 mm / min, and a gripping tool distance of 100 mm. As the (peeling allowance: 25 mm), the peeling load by the average value of the test force was measured. The evaluation was “◯” when 1N or more and “X” when less than 1N.

In Examples 1 to 5, the tape wear, the heat-resistant laminating property, and the heat-resistant peel strength were all “◯”, the overall evaluation was “◎”, and the peel strength at a high temperature was high.
On the other hand, in Comparative Examples 1 and 2, both the heat-resistant laminating property and the heat-resistant peel strength were evaluated as “x”, and the peel strength at a high temperature was inferior to those of Examples 1 to 5.

  Thus, according to the present invention, a binding tape having a high peel strength of the surface layer at a high temperature can be obtained.

10A, 10B Bundling tape 11A, 11B Buffer material layer 21A, 21B Protective layer 210B Film layer 31A, 31B Adhesive layer

Claims (3)

  A buffer layer made of an olefin resin foam, a protective layer made of an olefin resin or an olefin thermoplastic elastomer directly laminated on one surface of the buffer material layer, and a self layer laminated on the other surface of the buffer material layer A binding tape comprising an adhesive layer having adhesiveness.   The binding tape according to claim 1, further comprising a film layer directly laminated on a surface of the protective layer.   The binding tape according to claim 2, wherein the film layer is composed of a laminate of a stretched film and an unstretched film, and the stretched film is on the outside.

Images