JP5939865B2 - Electric wire with terminal - Google Patents

Description

  The present invention relates to an electric wire with a terminal. More specifically, the present invention relates to a terminal-attached electric wire in which a corrosion-proof material is provided around the connection portion between the electric wire conductor and the crimp terminal.

  In recent years, from the viewpoint of improving fuel efficiency by reducing the weight of vehicles, examples of using aluminum for covered electric wires constituting a wire harness are increasing. And as a terminal metal fitting connected to such a covered electric wire, generally copper or a copper alloy excellent in electric characteristics is used. However, if the material of the conductor of the covered electric wire is different from that of the terminal fitting, corrosion tends to occur at the contact portion between the conductor and the terminal fitting. Therefore, an anticorrosive material that can prevent corrosion of the contact portion is required.

  For this reason, as such an anticorrosive material, one having a thermoplastic polyamide resin as a main component and satisfying predetermined values for tensile shear strength, elongation rate and water absorption rate has been disclosed (for example, see Patent Document 1). In patent document 1, corrosion of a conductor and a terminal metal fitting is prevented by apply | coating this anticorrosive material to the connection part of the conductor of a covered electric wire with a terminal, and a terminal metal fitting.

JP 2011-103266 A

  However, in the covered electric wire with a terminal of patent document 1, the coating film of an anticorrosion material is formed by apply | coating the anticorrosion material which consists of a thermoplastic polyamide resin thinly to the connection part of a conductor and a terminal metal fitting. Therefore, the thickness of the anticorrosion material is not uniform, and as a result, there is a problem that the anticorrosion performance is not stable.

  The present invention has been made in view of the problems of such conventional techniques. And the objective of this invention is providing the electric wire with a terminal which can prevent the corrosion in the connection part of an electric wire and a crimp terminal over a long period of time.

  The electric wire with a terminal concerning the 1st mode of the present invention is provided with an electric wire which has a wire covering material which covers a conductor and the conductor, and a crimp terminal connected to the conductor of the electric wire. Furthermore, the anticorrosion material integrally molded around the connection portion between the conductor and the crimp terminal, and the periphery of the wire covering material adjacent to the connection portion, the connection portion between the conductor and the crimp terminal, and the anticorrosion material Provided with a primer. And the said anticorrosion material has thermoplastic elastomer as a main component, Furthermore, the peeling adhesive strength of the said anticorrosion material and the terminal material of the said crimp terminal is 0.2 N / mm or more, The said anticorrosion material and the said electric wire coating | covering material The peel adhesion strength is 0.5 N / mm or more.

  The electric wire with terminal according to the second aspect of the present invention is the electric wire with terminal according to the first aspect, wherein the conductor is made of aluminum or an aluminum alloy, and the terminal material of the crimp terminal is copper, copper alloy, stainless steel , Tin-plated copper, tin-plated copper alloy, tin-plated stainless steel, and the wire covering material is made of at least one of polyethylene, polypropylene, ethylene copolymer and propylene copolymer. Become.

  The terminal-attached electric wire according to a third aspect of the present invention is the electric wire with a terminal according to the first aspect, wherein the primer is mainly composed of at least one of an olefin resin, an amine compound, a silane coupling material, and an epoxy-based component. And

  The wire harness which concerns on the 4th aspect of this invention contains the electric wire with a terminal of the said 1st aspect.

  The method of manufacturing a terminal-attached electric wire according to a fifth aspect of the present invention includes a step of connecting a conductor and an electric wire having an electric wire covering material covering the conductor, a crimp terminal connected to the conductor of the electric wire, and the conductor. A step of applying a primer to the connection portion with the crimp terminal, an anticorrosive material is injected around the connection portion between the conductor coated with the primer and the crimp terminal, and around the wire coating material adjacent to the connection portion. And forming by molding. And the said anticorrosion material has thermoplastic elastomer as a main component, Furthermore, the peeling adhesive strength of the said anticorrosion material and the terminal material of the said crimp terminal is 0.2 N / mm or more, The said anticorrosion material and the said electric wire coating | covering material The peel adhesion strength is 0.5 N / mm or more.

  In the electric wire with a terminal of the present invention, it is possible to prevent the causative substance from entering from the contact interface between the anticorrosive material, the crimp terminal, and the electric wire covering material. Therefore, even when the conductor of the electric wire and the crimp terminal are made of different metal materials, corrosion at the connection portion between the conductor and the crimp terminal can be prevented over a long period of time. Furthermore, a primer is provided between the connection portion between the conductor of the electric wire and the crimp terminal and the anticorrosive material. Therefore, the adhesion between the crimp terminal and the anticorrosive material can be further improved, and the entry of the causative substance can be further prevented.

  Moreover, since the electric wire with a terminal of this invention forms the anticorrosion material by injection molding, the shape and thickness of an anticorrosion material are stabilized. As a result, it is possible to ensure sufficient strength even if the thickness of the anticorrosive material is thin. Furthermore, since the thickness of the anticorrosive material can be reduced, the electric wire with terminal of the present invention can be inserted into a connector housing of a conventional size, and there is no need to change the design of the connector housing.

FIG. 1 shows a terminal-attached electric wire according to an embodiment of the present invention. Fig.1 (a) is a perspective view which shows the said electric wire with a terminal, FIG.1 (b) is a side view which shows a part of the said electric wire with a terminal. FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 2A is a cross-sectional view showing a state where the primer covers the entire periphery of the connection portion between the conductor of the electric wire and the crimp terminal, and FIG. 2B shows a state where the primer covers a part of the connection portion. FIG. FIG. 3 is a schematic view showing a state before connecting the electric wire to the crimp terminal in the electric wire with terminal according to the embodiment of the present invention. FIG. 4 is a schematic diagram illustrating a state where the electric wire is connected to the crimp terminal in the electric wire with terminal according to the embodiment of the present invention. FIG. 5 is a perspective view showing a state in which the primer is applied to the connection portion between the conductor of the electric wire and the crimp terminal in the electric wire with terminal according to the embodiment of the present invention. FIG. 6 is a perspective view showing the wire harness according to the embodiment of the present invention. FIG. 7 is a schematic diagram for explaining a method for evaluating the anticorrosion performance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the dimension ratio of drawing is exaggerated on account of description, and may differ from an actual ratio.

[Wire with terminal]
As shown in FIGS. 1 to 4, the electric wire with terminal 1 of the present embodiment includes an electric wire 10 having a conductor 11 and an electric wire covering material 12 covering the conductor 11, and a crimp terminal 20 connected to the conductor 11 of the electric wire 10. Prepare. Furthermore, the terminal-attached electric wire 1 includes an anticorrosion material 30 integrally formed around the connection portion between the conductor 11 and the crimp terminal 20 and around the electric wire covering material 12 adjacent to the connection portion. A primer 31 is provided between the connection portion between the conductor 11 and the crimp terminal 20 and the anticorrosion material 30.

  The crimp terminal 20 in the terminal-attached electric wire 1 is of a female type, and has an electrical connection portion 21 connected to a counterpart terminal (not shown) at the front thereof. The electrical connecting portion 21 incorporates a spring piece that engages with the counterpart terminal, and has a box-like shape. Furthermore, at the rear part of the crimp terminal 20, there is an electric wire connecting part 22 that is connected by crimping to the terminal part of the electric wire 10 via the connecting part 23.

  The electric wire connecting portion 22 includes a conductor crimping portion 24 located on the front side and a covering material crimping portion 25 located on the rear side.

  The front conductor crimping portion 24 is in direct contact with the conductor 11 exposed by removing the wire covering material 12 at the end of the electric wire 10, and has a bottom plate portion 26 and a pair of conductor crimping pieces 27. The pair of conductor crimping pieces 27 extends upward from both side edges of the bottom plate portion 26 and is bent inward so as to wrap around the conductor 11 of the electric wire 10 so that the conductor 11 is in close contact with the upper surface of the bottom plate portion 26. Clamp it so that By the bottom plate portion 26 and the pair of conductor crimping pieces 27, the conductor crimping portion 24 is formed in a substantially U shape in a sectional view.

  The rear covering material crimping portion 25 is in direct contact with the wire covering material 12 at the terminal portion of the electric wire 10 and has a bottom plate portion 28 and a pair of covering material crimping pieces 29. The pair of covering material crimping pieces 29 extends upward from both side edges of the bottom plate portion 28 and is bent inward so as to wrap the portion with the wire covering material 12 at the terminal portion of the electric wire 10. The covering material 12 is crimped so as to be in close contact with the upper surface of the bottom plate portion 28. By the bottom plate portion 28 and the pair of covering material crimping pieces 29, the covering material crimping portion 25 is formed in a substantially U shape in a sectional view. Here, the bottom plate portion 26 of the conductor crimping portion 24 to the bottom plate portion 28 of the covering material crimping portion 25 are continuously formed as a common bottom plate portion.

  In this embodiment, as shown in FIG.3 and FIG.4, the terminal part of the electric wire 10 is inserted in the electric wire connection part 22 of the crimp terminal 20 of the said structure. As a result, the conductor 11 of the electric wire 10 is placed on the upper surface of the bottom plate portion 26 of the conductor crimping portion 24, and the portion of the electric wire 10 with the electric wire covering material 12 attached to the upper surface of the bottom plate portion 28 of the covering material crimping portion 25. Place. And the conductor crimping | compression-bonding part 24 and the coating | covering material crimping part 25 are deformed by pressing the electric wire connection part 22 and the terminal part of the electric wire 10. FIG. That is, the pair of conductor crimping pieces 27 of the conductor crimping portion 24 are bent inward so as to wrap the conductor 11, so that the conductor 11 is crimped so as to be in close contact with the upper surface of the bottom plate portion 26. Further, the pair of covering material crimping pieces 29 of the covering material crimping portion 25 is bent inward so as to wrap the portion with the wire covering material 12 so that the wire covering material 12 is in close contact with the upper surface of the bottom plate portion 28. Clamp it so that By doing so, the crimp terminal 20 and the electric wire 10 can be crimped and connected.

  And in this embodiment, as shown in FIG. 1, the circumference | surroundings of the conductor 11 covered by the connection part 23, the electric wire connection part 22, the electric wire connection part 22, and the electric wire coating | covering material 12 are coat | covered with the anticorrosion material 30. That is, the anticorrosion material 30 covers the boundary between the conductor crimping portion 24 and the tip of the conductor 11 of the electric wire 10 up to a part of the connecting portion 23, and also covers the boundary between the coating material crimping portion 25 and the wire coating material 12. It covers even part of the wire covering material 12 across the bridge. And the anticorrosion material 30 is formed in the terminal connection part of the electric wire 10 by integrally molding the material which adhere | attaches both the crimp terminal 20 and the electric wire coating | covering material 12. FIG. As described above, the conductor 11 and the wire covering material 12 covered with the wire connecting portion 22 are completely covered with the anticorrosive material 30, thereby ensuring the anticorrosion performance at the contact portion between the conductor 11 and the wire connecting portion 22. Can be secured. As shown in FIG. 2, the anticorrosion material 30 is formed in a substantially rectangular cross section, and has a size that can be mounted together with the electrical connection portion 21 in a terminal housing portion of a connector housing described later.

  Here, it is preferable that the anticorrosion material 30 has a thermoplastic elastomer as a main component. By using such a material as the anticorrosion material 30, the anticorrosion material 30 can be in close contact with the crimp terminal 20 and the wire coating material 12. Therefore, it is possible to prevent chloride ions and moisture that cause corrosion from entering the contact interface between the anticorrosive material 30, the crimp terminal 20 and the wire coating material 12. As a result, corrosion at the connecting portion between the wire connecting portion 22 and the conductor 11 of the crimp terminal 20 can be effectively prevented. In the present specification, the main component means a component of 50% by weight or more of the entire anticorrosive material.

  Specifically, it is preferable to use a thermoplastic olefin-based elastomer as the thermoplastic elastomer constituting the anticorrosion material 30.

  Furthermore, in order to prevent the entry of chloride ions and moisture as corrosion-causing substances, the anti-corrosion material 30 and the terminal material of the crimp terminal 20 have a peel adhesion strength of 0.2 N / mm or more. The peel adhesion strength with the material 12 needs to be 0.5 N / mm or more. Here, “peeling adhesive strength” in the present specification is determined by the measurement method defined in Japanese Industrial Standard JIS K6854-3 (Adhesive—Peeling peel strength test method—Part 3: T-type peel). Value. The above-mentioned material is used as a main component as the anticorrosion material 30, and the terminal material of the crimp terminal 20 and the peel adhesion strength between the wire coating material 12 and the anticorrosion material 30 are equal to or higher than the above values. High adhesion at the contact interface between the material 12 and the anticorrosion material 30 is obtained. As a result, it is possible to sufficiently ensure the sealing property at the contact interface, and to prevent the entry of the corrosion-causing substance.

  The upper limit of the peel adhesive strength between the anticorrosive material 30 and the terminal material of the crimp terminal 20 and the peel adhesive strength between the anticorrosive material 30 and the wire covering material 12 are not particularly limited. However, when the strength of the terminal material of the crimp terminal 20 is lower than the peel adhesion strength between the anticorrosive material 30 and the terminal material of the crimp terminal 20, the crimp terminal 20 may be damaged. Therefore, it is preferable that the peel adhesion strength between the anticorrosion material 30 and the terminal material of the crimp terminal 20 is lower than the strength of the terminal material of the crimp terminal 20. Similarly, when the strength of the wire covering material 12 is lower than the peel adhesion strength between the anticorrosive material 30 and the wire covering material 12, the wire covering material 12 may be damaged and the conductor 11 may be exposed. Therefore, the peel adhesion strength between the anticorrosion material 30 and the wire coating material 12 is preferably lower than the strength of the wire coating material 12.

  Here, although the metal with high electroconductivity can be used as the material of the conductor 11 of the electric wire 10, for example, copper, copper alloy, aluminum, aluminum alloy, etc. can be used. However, it is preferable to use lightweight aluminum or aluminum alloy as the conductor 11 from the viewpoint of reducing the weight of the wire harness in recent years.

  Moreover, as a material of the electric wire coating | covering material 12 which covers the conductor 11, although resin which can ensure electrical insulation can be used, for example, olefin resin can be used. Specifically, at least one of polyethylene, polypropylene, ethylene copolymer, and propylene copolymer can be the main component. Among these, the wire covering material 12 is preferably made of polypropylene. Since polypropylene has a high adhesive force with the thermoplastic elastomer, the adhesive force at the contact interface between the wire covering material 12 and the anticorrosive material 30 can be increased. In addition, the main component here means the component of 50 weight% or more of the whole wire coating material.

  Furthermore, as the material (terminal material) of the crimp terminal 20, a metal having high conductivity can be used. For example, copper, copper alloy, stainless steel, tin-plated copper, tin-plated copper alloy, and tin-plating At least one of the stainless steel made can be used. Moreover, at least one of gold-plated copper, copper alloy, and stainless steel may be used, and at least one of silver-plated copper, copper alloy, and stainless steel may be used. Among these, it is preferable to use copper, copper alloy and stainless steel whose surface is plated with tin (Sn). Since the thermoplastic elastomer has a high adhesive strength with tin, the adhesive strength of the contact interface between the crimp terminal 20 and the anticorrosive material 30 can be increased.

  And the electric wire 1 with a terminal of this embodiment is provided with the primer 31 between the connection part of the conductor 11 and the crimp terminal 20, and the anticorrosive 30 as shown in FIG.2 and FIG.5. . By providing the primer 31, the adhesiveness between the conductor crimping portion 24 in the crimp terminal 20 and the conductor 11 of the electric wire 10 and the anticorrosion material 30 can be improved.

  As shown in FIGS. 2 and 5, the primer 31 is applied so as to cover the entire periphery of the conductor crimping portion 24 and the bottom plate portion 26 of the crimp terminal 20 and the tip of the conductor 11 exposed on the front side of the conductor crimping portion 24. be able to. Furthermore, you may apply | coat so that the conductor 11 exposed between the conductor crimping | compression-bonding part 24 and the covering material crimping part 25 may be covered. The primer 31 may be applied so as to cover the entire periphery of the covering material crimping portion 25 of the crimp terminal 20.

  Any material can be used as the material of the primer 31 as long as it improves the adhesion between the crimp terminal 20 and the anticorrosion material 30. For example, at least an olefin resin, an amine compound, a silane coupling material, and an epoxy-based component can be used. It is preferable that one is a main component. These materials have high adhesive strength with copper, copper alloy, stainless steel, tin-plated copper, tin-plated copper alloy, and tin-plated stainless steel that can be used as the terminal material of the crimp terminal 20. Furthermore, the adhesive force with the thermoplastic elastomer which can be used as the anticorrosion material 30 is also high. Therefore, by using the primer 31, the adhesion between the crimp terminal 20 and the anticorrosion material 30 is further improved, the corrosion-causing substance is prevented from entering, and corrosion at the connection portion between the conductor and the crimp terminal is prevented for a long period. be able to. Here, the main component means a component of 50% by weight or more of the whole primer.

  Here, as shown in FIG. 2, the thickness t of the anticorrosion material 30 when integrally formed around the connection portion between the conductor 11 and the crimp terminal 20 and around the wire covering material 12 adjacent to the connection portion. Is preferably at least 0.01 mm. When sufficient sealing performance between the crimp terminal 20 and the wire covering material 12 and the anticorrosion material 30 can be ensured, the thickness of the anticorrosion material 30 may be less than 0.01 mm. However, when the thickness t of the thinnest portion of the anticorrosion material 30 is 0.01 mm or more, sufficient strength can be secured against the internal pressure inside the anticorrosion material 30. Therefore, it is possible to suppress the entry of the causative substance over a long period of time and prevent corrosion at the connection portion between the conductor 11 and the crimp terminal 20.

  Thus, in the electric wire with a terminal according to the present embodiment, the anticorrosion material is integrally formed around the connection portion between the conductor and the crimp terminal and around the wire covering material adjacent to the connection portion. In addition, a primer is provided between the connection portion between the conductor and the crimp terminal and the anticorrosive material. Further, the anticorrosive material contains a thermoplastic elastomer as a main component. Further, the peel adhesion strength between the anticorrosion material and the terminal material of the crimp terminal is 0.2 N / mm or more, and the peel adhesion strength between the corrosion protection material and the wire coating material is 0.5 N / mm or more. Thereby, even if it is a case where the conductor and crimp terminal of an electric wire consist of a dissimilar metal material, these corrosion can be suppressed. That is, since it is possible to prevent the corrosion-causing substance from entering from the contact interface between the anticorrosive material, the crimp terminal, and the wire coating material, corrosion at the connection portion between the conductor and the crimp terminal can be prevented over a long period of time.

[Method of manufacturing electric wire with terminal]
Next, the manufacturing method of the electric wire with a terminal of this embodiment is explained. First, as shown in FIGS. 3 and 4, the terminal-attached electric wire 1 inserts the terminal portion of the electric wire 10 into the electric wire connecting portion 22 of the crimp terminal 20. As a result, the conductor 11 of the electric wire 10 is placed on the upper surface of the bottom plate portion 26 of the conductor crimping portion 24, and the portion of the electric wire 10 with the electric wire covering material 12 attached to the upper surface of the bottom plate portion 28 of the covering material crimping portion 25. Place. Then, the conductor 11 is crimped so as to be in close contact with the upper surface of the bottom plate portion 26 by bending the pair of conductor crimping pieces 27 of the conductor crimping portion 24 inward. Further, by bending the pair of covering material crimping pieces 29 of the covering material crimping portion 25 inward, the wire coating material 12 is crimped so as to be in close contact with the upper surface of the bottom plate portion 28. Thereby, the crimp terminal 20 and the electric wire 10 can be connected.

  Next, the connection portion between the crimp terminal 20 and the electric wire 10 is placed on a mold. Thereafter, a primer is introduced into the mold, and the primer is applied to the surface of the conductor crimping portion 24, the covering material crimping portion 25, and the conductor 11 in the crimp terminal 20. At this time, the primer can be discharged and applied using a nozzle or the like. Further, before placing the connection portion of the crimp terminal 20 and the electric wire 10 on the mold, a primer may be applied to the surface of the conductor crimp portion 24, the covering material crimping portion 25, or the conductor 11 using a brush or the like. good.

  And after apply | coating a primer, the inside of a metal mold | die is filled with the resin of the anticorrosion material fuse | melted by heating, The resin of the anticorrosion material fuse | melted is solidified by cooling a metal mold | die. And the electric wire with a terminal by which the connection part of the crimp terminal 20 and the electric wire 10 was coat | covered with the anticorrosion material 30 can be obtained by taking out from a metal mold | die. That is, the anticorrosion material 30 can be formed by placing the connecting portion between the crimp terminal 20 and the electric wire 10 on a mold and performing injection molding.

  Thus, the electric wire with a terminal of this embodiment forms the anticorrosive material by injection molding. Therefore, since the shape and thickness of the anticorrosion material are stabilized, it is possible to ensure sufficient strength even if the thickness of the anticorrosion material is thin. Further, since the thickness of the anticorrosive material can be reduced, it is not necessary to change the pitch dimension of the connector housing described later, and therefore the electric wire with terminal of the present embodiment can be inserted into a conventional connector housing. . Therefore, it is not necessary to change the design of the connector housing for the electric wire with terminal of the present embodiment.

[Wire Harness]
The wire harness of this embodiment includes the above-described electric wire with a terminal. Specifically, the wire harness 2 of this embodiment is provided with the connector housing 40 and the above-mentioned electric wire 1 with a terminal as shown in FIG.

  A plurality of mating terminal mounting portions (not shown) to which mating terminals (not shown) are mounted are provided on the surface side of the connector housing 40. A plurality of terminal accommodating portions 41 are provided on the back side of the connector housing 40. In each terminal accommodating part 41, the crimp terminal 20 and the anticorrosion material 30 in the electric wire 1 with a terminal are each mounted | worn. The crimp terminal 20 is attached to the connector housing 40, and the electric wire 10 is pulled out from the back side of the connector housing 40.

  As described above, since the thickness of the anticorrosion material 30 in the terminal-attached electric wire 1 of this embodiment can be reduced, it is not necessary to change the pitch dimension of the connector housing 40 specially. Therefore, the terminal-attached electric wire of the present embodiment can be inserted into a conventional connector housing, and there is no need to change the design of the connector housing specially for the terminal-attached electric wire.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited to these Examples.

[Example]
In Examples 1-1 to 1-3 and 2-1 to 2-3, first, the materials shown in Table 1 and Table 2 were prepared as the materials for the anticorrosive and the primer. Further, as the electric wires, conductors made of aluminum and electric wire covering materials made of polypropylene (PP) were prepared. Furthermore, what used tin-plated copper as a terminal material was prepared as a crimp terminal.

  Next, the electric wire and the crimp terminal were connected, and then the connection portion between the crimp terminal 20 and the electric wire 10 was placed on the mold. Furthermore, the primer was applied to the entire periphery of the conductor crimping portion and the bottom plate portion of the crimping terminal and solidified. Then, the material of the anticorrosive material of each Example which was heated and melted inside the mold is filled, and the material of the melted anticorrosive material is solidified by cooling the mold. And the electric wire with a terminal of each Example was obtained by taking out from a metal mold | die. Tables 1 and 2 also show the peel adhesion strength between the anticorrosion material used in each example and the terminal material (tin) of the crimp terminal, and the peel adhesion strength between the anticorrosion material and the wire coating material (PP). .

[Comparative example]
In Comparative Examples 1-1 to 1-4 and 2-1 to 2-4, except that the materials shown in Table 1 and Table 2 were used as the material of the anticorrosive material, terminals of each comparative example were attached. I got an electric wire.

[An endurance test]
The terminal-attached electric wires obtained in the above examples and comparative examples were heated in air at 120 ° C. for 120 hours.

[Anti-corrosion performance evaluation]
In each of the examples and comparative examples, the initial terminal-attached wire before the durability test and the terminal-attached wire after the durability test are immersed in water 51 filled in a container 50 as shown in FIG. I let you. Thereafter, air was introduced at a pressure of 200 kPa for 30 seconds from the end of the electric wire with terminal opposite to the side where the crimp terminal was connected. At that time, the case where no leakage of bubbles was recognized from the crimp terminal, the anticorrosive material and the electric wire was indicated as “◯”, and the case where leakage was recognized was indicated as “X”. The results of the anticorrosion performance evaluation are also shown in Tables 1 and 2.

  As shown in Table 1 and Table 2, since the terminal-attached electric wires of the examples according to the present embodiment were free from air bubble leakage even after the initial and endurance tests, It can be seen that the adhesion to the anticorrosive material is high and the anticorrosion performance is excellent.

  On the other hand, in the electric wire with a terminal of the comparative example, air bubbles leaked from the contact interface between the anticorrosive material and the crimp terminal. That is, since the electric wire with a terminal of these comparative examples has a peel adhesion strength between the anticorrosive material and the terminal material (Sn) of the crimp terminal of less than 0.2 N / mm, the adhesion between the anticorrosive material and the crimp terminal is low. Insufficient and presumed that leakage occurred.

  Although the present invention has been described with reference to the examples and comparative examples, the present invention is not limited to these, and various modifications can be made within the scope of the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Electric wire with a terminal 2 Wire harness 10 Electric wire 11 Conductor 12 Electric wire coating material 20 Crimp terminal 30 Corrosion prevention material 31 Primer

Claims (5)

An electric wire having a conductor and an electric wire covering material covering the conductor;
A crimp terminal connected to the conductor of the wire;
An anticorrosion material integrally molded around the connection portion between the conductor and the crimp terminal, and around the wire covering material adjacent to the connection portion,
A connection portion between the conductor and the crimp terminal, a primer provided between the anticorrosive material,
With
The anticorrosive material is mainly composed of a thermoplastic elastomer, and further, a peel adhesion strength between the anticorrosive material and the terminal material of the crimp terminal is 0.2 N / mm or more, and the anticorrosive material and the wire coating material A terminal-attached electric wire having a peel adhesion strength of 0.5 N / mm or more. The conductor is made of aluminum or an aluminum alloy,
The terminal material of the crimp terminal comprises at least one of copper, copper alloy, stainless steel, tin-plated copper, tin-plated copper alloy, tin-plated stainless steel,
The said electric wire coating | covering material consists of at least one of polyethylene, a polypropylene, an ethylene copolymer, and a propylene copolymer, The electric wire with a terminal of Claim 1 characterized by the above-mentioned.   The electric wire with a terminal according to claim 1 or 2, wherein the primer contains at least one of an olefin resin, an amine compound, a silane coupling material, and an epoxy component as a main component. The wire harness characterized by including the electric wire with a terminal as described in any one of Claims 1 thru | or 3 . Connecting an electric wire having a conductor and a wire covering material covering the conductor, and a crimp terminal connected to the conductor of the electric wire;
Applying a primer to the connecting portion between the conductor and the crimp terminal;
Forming an anticorrosive material by injection molding around the connection portion between the conductor coated with the primer and the crimp terminal, and around the wire covering material adjacent to the connection portion;
Have
The anticorrosive material is mainly composed of a thermoplastic elastomer, and further, a peel adhesion strength between the anticorrosive material and the terminal material of the crimp terminal is 0.2 N / mm or more, and the anticorrosive material and the wire coating material A method for producing a terminal-attached electric wire, wherein the peel adhesive strength is 0.5 N / mm or more.

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