JP2019031613A - Adhesive tape, wire harness, and terminal treatment method for adhesive tape - Google Patents

Abstract

To provide an adhesive tape capable of enhancing detachability of a terminal part without using an adhesive layer and a heterogeneous material; and to provide a wire harness, and a terminal treatment method for the adhesive tape.SOLUTION: An adhesive tape 1 includes a core, and a tape part 20 wound in a roll shape around the core, and having a substrate 21 and an adhesive layer 22 provided on one surface of the substrate 21. In the tape part 20, the adhesive layer 22 in a terminal part EP which is a region having a prescribed length from a terminal E at an outermost circumferential side, and wound in a roll shape, has an embossment structure having irregularities, and the adhesive layer 22 in a non-terminal part NEP which is a region exceeding the prescribed length, has an embossment structure not having irregularities.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an adhesive tape, a wire harness, and a terminal processing method for an adhesive tape.

  2. Description of the Related Art Conventionally, an adhesive tape that is wound around an electric wire or the like has been known for the purpose of bundling a linear body such as a plurality of electric wires or insulating a joint portion of an electric wire (for example, see Patent Documents 1 to 3). The adhesive tape generally includes a core and a tape portion wound around the core in a roll shape, and the tape portion includes a base material and an adhesive layer provided on one surface of the base material.

  In such an adhesive tape, it is preferable that the terminal portion which is wound in a roll shape and becomes the outermost peripheral side in the tape portion has high identification (easy to find) and high peelability (easy to peel). Therefore, a terminal processing method for processing the terminal portion of the tape portion has been proposed (see, for example, Patent Document 4). In the terminal processing method described in Patent Document 4, a hot-melt type material is heated and applied to the adhesive layer of the terminal part, and then the terminal part is cooled to inactivate the adhesive layer. Further, Patent Document 4 also includes a terminal treatment method in which the adhesive layer is inactivated by directly spraying and adhering powder onto the adhesive layer, or by applying a solution to volatilize a chemical change or a volatile solvent. Proposed. Furthermore, Patent Document 4 also proposes a terminal treatment method in which the adhesive in the adhesive layer is chemically changed with heat or ultraviolet rays to make the adhesive layer an inactive layer.

Japanese Utility Model Publication No. 4-40740 Japanese Utility Model Publication No. 4-25834 Japanese Utility Model Publication No. 5-44525 JP 2001-270649 A

  However, in the terminal treatment method described in Patent Document 4, since the adhesive layer is inactive using a substance different from the adhesive layer, an adverse effect when the foreign substance comes into contact with the electric wire or the like (for example, the wire coating portion No consideration is given to the possibility of early deterioration.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a pressure-sensitive adhesive tape capable of improving the peelability of the terminal portion without using a substance different from the pressure-sensitive adhesive layer. It is providing the terminal processing method of a wire harness and an adhesive tape.

  The pressure-sensitive adhesive tape of the present invention is a pressure-sensitive adhesive tape comprising a core and a tape portion wound around the core in a roll shape and having a base material and a pressure-sensitive adhesive layer provided on one side of the base material. The tape part has an embossed structure in which the adhesive layer of the terminal part, which is an area from the terminal that is wound in a roll shape to the outermost peripheral side to a predetermined length, has an unevenness, and exceeds the predetermined length The non-terminal adhesive layer is a non-embossed structure having no irregularities.

  According to this adhesive tape, the adhesive layer of the terminal part, which is an area from the terminal to a predetermined length, has an embossed structure with irregularities, and the non-terminal part, which is an area exceeding the predetermined length, has no irregularities. It has a structure. For this reason, in a terminal part, a convex part contributes to adhesion and a crevice becomes difficult to contribute to adhesion in an adhesion layer, and can reduce adhesive power. Therefore, the peelability of the terminal portion can be enhanced without using a substance different from the adhesive layer.

  Moreover, the adhesive tape of this invention WHEREIN: It is preferable that the said base material has the embossing structure in which the said terminal part has an unevenness | corrugation, and the said non-terminal part has a non-embossing structure which does not have an unevenness | corrugation.

  According to this pressure-sensitive adhesive tape, since the terminal portion has an embossed structure even with respect to the base material, irregularities can be confirmed even when viewed from the base material side, the terminal portion can be easily found, and the terminal portion can be easily identified. be able to.

  Moreover, the adhesive tape of this invention WHEREIN: It is preferable that the area of the convex part which occupies the area for the adhesive layer of the said terminal part is 10% or less.

  According to this adhesive tape, since the area of the convex portion occupying the area of the terminal portion is 10% or less, the terminal portion can exhibit the same peelability as when the adhesive layer in the entire terminal portion is made inactive. it can.

  Moreover, the wire harness of this invention is equipped with an electric wire and the said tape part of the adhesive tape as described in any one of the above which is wound around the said electric wire, It is characterized by the above-mentioned.

  According to this wire harness, since the wire harness is provided with the tape portion of the above-mentioned adhesive tape wound around the wire, the wire harness is manufactured using the adhesive tape with improved peelability, The manufacturing time can be shortened and the cost can be reduced.

  Moreover, the terminal processing method of the adhesive tape of this invention was equipped with the tape part which has a core and the adhesive layer provided in the single-sided surface of the said base material wound by roll shape with respect to the said core. A terminal treatment method for an adhesive tape, wherein a winding step for winding the tape portion around the core, and a cutter is operated on the tape portion wound around the core for a predetermined length by the winding step. The cutting step of cutting the tape portion, and in conjunction with the operation of the cutter in the cutting step, by operating a mold having irregularities, from the cutting portion by the cutter of the tape portion to a predetermined length And a terminal processing step of processing the terminal portion, which is a region, into an embossed structure having irregularities.

  According to this terminal processing method of the adhesive tape, in order to process the terminal part into an embossed structure by operating a mold having irregularities in conjunction with the operation of the cutter, the terminal part formed when cutting the adhesive tape On the other hand, terminal processing can be performed simultaneously with disconnection. Therefore, when manufacturing an adhesive tape, the terminal part which improved peelability can be formed, without using a substance different from an adhesive layer.

  ADVANTAGE OF THE INVENTION According to this invention, the adhesive tape, the wire harness, and the terminal processing method of an adhesive tape which can be made easy to peel without using a substance different from an adhesive layer can be provided.

It is a perspective view of the wire harness containing the tape part of the adhesive tape which concerns on embodiment of this invention. It is a side view which shows the adhesive tape which concerns on embodiment of this invention. It is a partial expanded sectional view of the adhesive tape shown in FIG. It is a figure which shows the terminal processing method of the adhesive tape which concerns on this embodiment.

  Hereinafter, the present invention will be described according to preferred embodiments. Note that the present invention is not limited to the embodiments described below, and can be appropriately changed without departing from the spirit of the present invention. Further, in the embodiment described below, there is a part where illustration or description of a part of the configuration is omitted, but details of the omitted technology are within a range in which there is no contradiction with the contents described below. Needless to say, a known or well-known technique is appropriately applied.

  FIG. 1 is a perspective view of a wire harness including a tape portion of an adhesive tape according to an embodiment of the present invention. The wire harness WH includes, for example, a plurality of electric wires W and a tape portion 20 of an adhesive tape (see reference numeral 1 in FIG. 2) described later, and has a structure in which the plurality of electric wires W are bundled by the tape portion 20. . The tape part 20 has the adhesion layer (refer code | symbol 22 of FIG. 3) mentioned later, and is holding | maintaining the some electric wire W bundled using the adhesive force of an adhesion layer.

  FIG. 2 is a side view showing the adhesive tape according to the embodiment of the present invention, and FIG. 3 is a partially enlarged sectional view of the adhesive tape shown in FIG. In addition, in FIG. 2, the state which peeled partially the adhesive tape from the terminal side is shown.

  As shown in FIG. 2, the adhesive tape 1 includes a core 10 and a tape portion 20 wound around the core 10 in a roll shape. The core 10 is a core material for winding the tape portion 20. As shown in FIG. 3, the tape unit 20 includes a base material 21 and an adhesive layer 22 provided on one side of the base material 21. The tape portion 20 is wound around the core 10 so that the adhesive layer 22 is on the inside and the base material 21 is on the outside.

  Further, in the present embodiment, the tape unit 20 has a predetermined process applied to the terminal unit EP. The terminal portion EP is an area from the terminal E that is wound in a roll shape and becomes the outermost periphery to a predetermined length. On the other hand, the non-terminal portion NEP refers to an area exceeding a predetermined length from the terminal E. In the present embodiment, the terminal portion EP has an embossed structure in which the adhesive layer 22 has irregularities. For example, as shown in FIG. 3, when the surface of the adhesive layer 22 of the non-terminal portion NEP is the reference surface S1, the terminal portion EP has a recess 22a formed so as to be pushed from the reference surface S1 in the longitudinal direction. Is formed. On the other hand, the non-terminal portion NEP has a non-embossed structure in which the adhesive layer 22 does not have irregularities. In the example shown in FIG. 3, the predetermined length is the length from the terminal E to the part P1 farthest from the terminal E in the recess 22a.

  Thus, in this embodiment, since the some recessed part 22a is intermittently formed in the adhesion layer 22, as for the terminal part EP of the tape part 20, the recessed part 22a becomes difficult to contact the base material 21 inside 1 circumference. That is, in the terminal part EP, since the recessed part 22a becomes difficult to contribute to adhesion | attachment and the convex part 22b contributes to adhesion | attachment, the peelability of the terminal part EP can be improved. Moreover, since the peelability can be improved simply by pressing the adhesive layer 22 of the terminal portion EP from the reference plane S1 to form the recess 22a, it is not necessary to use a foreign substance such as a hot-melt type material for the adhesive layer 22. . On the other hand, since the non-terminal portion NEP does not have an embossed structure, it is possible to maintain the adhesive force in a portion other than the terminal portion EP.

  In addition, in the example shown in FIG. 3, although the recessed part 22a is formed as a groove | channel continuous in the width direction of the tape part 20, it is not restricted to this in particular. For example, the recess 22 a may be formed in a zigzag or checkered pattern when the tape unit 20 is viewed in plan, or may be formed as a groove continuous in the longitudinal direction of the tape unit 20.

  In addition, the terminal portion EP has not only irregularities on the adhesive layer 22 but also irregularities on the substrate 21 side. In this embodiment, the base material 21 has the protrusion part P which protrudes from the reference plane S2 in the terminal part EP. If demonstrating it concretely, the base material 21 will become the convex part 21a which the site | part corresponding to the recessed part 22a of the adhesion layer 22 protrudes from the reference plane S2 in the terminal part EP. On the other hand, the base material 21 is a concave portion 21b in which a portion corresponding to the convex portion 22b does not protrude from the reference surface S2. Thereby, since the site | part which protrudes intermittently in the base-material 21 side of the terminal part EP is formed, the discriminability of the terminal part EP will improve. The base material 21 has a non-embossed structure similar to the adhesive layer 22 in the non-terminal portion NEP.

  Next, the terminal processing method of the adhesive tape 1 which concerns on this embodiment is demonstrated. FIG. 4 is a diagram illustrating a terminal processing method for the adhesive tape 1 according to the present embodiment.

  As shown in FIG. 4, in this embodiment, the tape part 20 is wound up by the core 10 (winding process). The core 10 is rotated together with the tape part 20 that has been wound by a plurality of touch rolls 30 to wind the tape part 20 that is supplied.

  If the tape part 20 is wound by the core 10 for a predetermined length, the tape part 20 is cut by operating the cutter 40 with respect to the tape part 20 (cutting step). Further, in conjunction with the operation of the cutter 40, the embossing mold 50 having irregularities is also operated (terminal processing step). Thereby, terminal part EP which is a field from cutting part CP (namely, terminal E) by cutter 40 to predetermined length among tape parts 20 is processed into embossed structure.

  Therefore, in this embodiment, terminal processing can be performed simultaneously with cutting | disconnection with respect to the terminal part EP formed when cut | disconnecting the adhesive tape 1. FIG.

  A core 10 ′ for manufacturing the next adhesive tape 1 is prepared on the side of the tape part 20 cut by the cutter 40 that is not embossed, and the next core 10 is prepared after the terminal processing step. 'Is set on the plurality of touch rolls 30.

  Next, examples and comparative examples will be described. In the adhesive tapes shown in Examples 1 to 10 and Comparative Examples 1 and 2, a vinyl chloride film was used as the base material, and a rubber-based adhesive was used as the adhesive layer.

  About Examples 1-10, the adhesive tape terminal-processed with the terminal processing method shown in FIG. 4 was manufactured. At this time, a predetermined length from the terminal serving as the terminal portion was 10 mm, and 19 mm from the terminal (that is, the non-terminal portion was 9 mm) was used as a sample. In addition, about the embossing metal mold, different ones in Examples 1 to 10 were used, and the ratio of the adhesive contact area in the terminal portion (in FIG. 3, the area of the convex portion 22b relative to the area of the terminal portion EP) was changed. .

  For Comparative Example 1, an embossing mold was removed from the terminal processing configuration shown in FIG. 4, and an adhesive tape was obtained without performing terminal processing. Of this adhesive tape, 19 mm from the end was used as a sample. In addition, since the terminal process is not performed in the comparative example 1, the ratio of the adhesion contact area in a terminal part will be 100%.

  About the comparative example 2, what stuck the colored PP (polypropylene) film in the part 10mm from the terminal of the adhesive tape was employ | adopted, and 19 mm from the terminal was made into the sample. In Comparative Example 2, since the portion 10 mm from the terminal is covered with the PP film, the ratio of the adhesive contact area in the terminal part is 0%.

  With respect to the adhesive tapes according to Examples 1 to 10 and Comparative Examples 1 and 2 as described above, the peelability and the distinguishability were evaluated.

  For peelability, measure the time required to peel off the terminal portions of the ten adhesive tapes, and if it takes 60 seconds or more, it is “1”, and if it takes 45 seconds or more but less than 60 seconds, it is “2”. The case where it took 30 seconds or more and less than 45 seconds was set as “3”, the case where it took 15 seconds or more and less than 30 seconds was set as “4”, and the case where it took less than 15 seconds was set as “5”.

  For discriminability, measure the time required to find the terminal part of 10 adhesive tapes, and if it takes 30 seconds or more, it is “1”, if it takes 25 seconds or more and less than 30 seconds, it is “2”. The case where it took 20 seconds or more and less than 25 seconds was set as “3”, the case where it took 15 seconds or more and less than 20 seconds was set as “4”, and the case where it took less than 15 seconds was set as “5”.

Table 1 shows the results of peelability and distinguishability.

  As shown in Table 1, it was found that peelability and discriminability were improved in all of Examples 1 to 10. Furthermore, as shown in Examples 9 and 10, when the ratio of the adhesive contact area is 10% or less, the peelability equivalent to that when a colored PP film is attached (that is, the ratio of the adhesive contact area is 0%) and It was found that discrimination could be achieved.

  Thus, according to the adhesive tape 1 which concerns on this embodiment, the adhesive layer 22 of the terminal part EP which is an area | region from the terminal E to predetermined length becomes the embossed structure which has an unevenness | corrugation, and exceeds predetermined length The non-terminal portion NEP which is a region has a non-embossed structure having no unevenness. For this reason, in terminal part EP, convex part 22b contributes to adhesion, and crevice 22a becomes difficult to contribute to adhesion in adhesion layer 22, and can reduce adhesive power. Therefore, the peelability of the terminal portion EP can be improved without using a substance different from the adhesive layer 22.

  Moreover, since the terminal part EP also has an embossed structure with respect to the base material 21, irregularities can be confirmed even when viewed from the base material 21 side, the terminal part EP can be easily found, and the terminal part EP is improved in distinguishability. be able to.

  Moreover, since the area of the convex part 22b occupying the area of the terminal part EP is 10% or less, the terminal part EP can exhibit the peelability equivalent to the case where the adhesive layer 22 in the entire terminal part EP is made inactive. .

  Moreover, according to the wire harness WH which concerns on this embodiment, in order to provide the electric wire W and the tape part 20 of the adhesive tape 1 wound around the electric wire W, the adhesive tape 1 which improved peelability is used. Thus, the wire harness WH is manufactured, and the manufacturing time can be shortened and the cost can be reduced.

  Moreover, according to the terminal processing method of the adhesive tape 1 which concerns on this embodiment, in order to process the terminal part EP to an emboss structure by operating the embossing metal mold | die 50 which has an unevenness | corrugation in response to the operation | movement of the cutter 40, an adhesive tape Terminal processing can be performed simultaneously with the cutting on the terminal portion EP formed when cutting 1. Therefore, when manufacturing the adhesive tape 1, the terminal part EP which improved peelability can be formed, without using a different substance from the adhesive layer 22. FIG.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, in this embodiment, the pressure-sensitive adhesive tape 1 has the concave portion 22a in the pressure-sensitive adhesive layer 22 and has the protruding portion P in the base material 21. However, the present invention is not limited to this. There may be.

  Moreover, in the adhesive tape 1 which concerns on this embodiment, although the recessed part 22a is intermittently provided with two or more, not only this but only one may be provided. Furthermore, although the terminal E of the tape part 20 is the convex part 22b, the concave part 22a may be sufficient. In addition, it can be said that the convex portion 22b is preferable because dust or the like hardly adheres from the terminal E of the tape portion 20.

  In addition, in this embodiment, the terminal portion EP has a concave portion 22a formed by pressing the adhesive layer 22 toward the base material 21 side. That is, the convex portion 22b is flush with the reference plane S1. However, the present invention is not limited to this, and a convex portion 22b that protrudes from the reference surface S1 may be formed in the adhesive layer 22 by the base material 21 being pushed into the adhesive layer 22 side. In addition, the protrusion 22b may protrude from the reference surface S1, and the recess 22a may be recessed from the reference surface S1. The same applies to the base 21 with respect to the reference plane S2.

  In the present embodiment, the positions of the concave portions 22a of the adhesive layer 22 and the convex portions 21b of the substrate 21 correspond to each other. Furthermore, the positions of the convex portions 22b of the adhesive layer 22 and the concave portions 21a of the base material 21 correspond to each other. However, the present invention is not limited to this and may be non-compliant.

  Furthermore, the base material 21 and the adhesive layer 22 are not limited to the embossed structure formed by the embossing mold 50. For example, the base material 21 and the adhesive layer 22 are partially scraped within the thickness range to provide an embossed structure. It may be said. Furthermore, the same substance may be partially laminated on the adhesive layer 22 to form an embossed structure.

1: Adhesive tape 10: Core 20: Tape part 21: Base material 21a: Convex part 21b: Concave part 22: Adhesive layer 22a: Concave part 40: Cutter 50: Embossing die (die)
CP: cutting part E: terminal EP: terminal part NEP: non-terminal part W: electric wire WH: wire harness

Claims (5)

An adhesive tape comprising a core and a tape portion wound in a roll shape with respect to the core, and having a base material and an adhesive layer provided on one side of the base material,
The tape part has an embossed structure in which the adhesive layer of the terminal part, which is an area from the terminal that is wound in a roll shape to the outermost peripheral side to a predetermined length, has an unevenness, and in an area that exceeds the predetermined length A pressure-sensitive adhesive tape characterized in that a non-end portion of the pressure-sensitive adhesive layer has a non-embossed structure having no irregularities. The pressure-sensitive adhesive tape according to claim 1, wherein the base material has an embossed structure in which the terminal portion has unevenness, and the non-terminal portion has a non-embossed structure in which unevenness does not exist. The pressure-sensitive adhesive tape according to claim 1 or 2, wherein the pressure-sensitive adhesive layer of the terminal portion has an area of a convex portion occupying the area of 10% or less. Electric wires,
The said tape part of the adhesive tape of any one of Claims 1-3 wound around the said electric wire,
A wire harness comprising: A terminal treatment method for an adhesive tape comprising a core and a tape portion wound in a roll shape with respect to the core and having a base material and an adhesive layer provided on one side of the base material,
A winding step of winding the tape portion around the core;
A cutting step of cutting the tape portion by operating a cutter on the tape portion wound on the core by a predetermined length by the winding step;
By interlocking with the operation of the cutter in the cutting step, by operating a die having irregularities, the terminal portion that is an area from the cutting portion by the cutter to a predetermined length in the tape portion has irregularities. A terminal processing step for processing the embossed structure;
The terminal processing method of the adhesive tape characterized by having.