JP2019015525A - Temperature detector - Google Patents

Abstract

To provide a temperature detector arranged in a heating device with a high temperature zone, such as a water heater and a warming device with a low temperature zone, such as an electric blanket, a carpet, and a seat heater for a vehicle, the temperature detector which is hardly subjected to a change in resistance value due to bending or vibration and is used for detecting an abnormal heat generation or a temperature rise of a detection object without malfunction and cutting off a circuit of the detection object.SOLUTION: The temperature detector includes one or more metal covered wires 3A each having a fiber bundle 1A made of a resin shrinkable or melting at a predetermined temperature and a metal layer 2 provided on an outer periphery of the fiber bundle 1A and an insulating covering layer 4 covering the one or more metal covered wires 3A, thereby solving the problem mentioned above. The metal layer 2 is preferably a plating layer or a vapor deposition layer, and the insulating coating layer 4 is preferably selected from an extruded resin layer, a tape wound layer, a film laminate layer, and a baked coating layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a temperature detector, and more specifically, a heating device such as a water heater, a heating device such as an electric blanket, a carpet, a vehicle seat heater, a battery, a solar panel, etc. The present invention relates to a temperature detector that can be used to detect a temperature rise and shut off a circuit.

  A metal wire that melts at a predetermined temperature is known as a thermal fuse. However, the conventional thermal fuse uses a low melting point metal material whose melting temperature is about 220 ° C. as a lower limit. Therefore, in order to obtain a metal wire that melts at a temperature lower than that, metal materials containing harmful substances such as lead and cadmium, metal materials containing many expensive materials such as indium and silver, and being vulnerable to oxidation containing many zinc A metal material or a low-strength metal material containing a large amount of bismuth must be used, and there is a problem that it is difficult to put a long linear or belt-shaped thermal fuse into practical use.

  In addition, there is a problem that a thermal fuse constituted by a conductive resin in which a conductive powder such as metal powder or carbon powder is filled in a resin, a conductive paint containing a conductive polymer, or the like has low strength and is easily broken.

  In order to solve such a problem, Patent Document 1 proposes a long linear temperature detector capable of detecting a temperature at a low temperature. This linear temperature detector has a detection line composed of a conductive polymer and a fiber bundle, the fiber bundle is composed of thermoplastic fibers, and the conductive polymer is continuously present in the length direction in the fiber bundle. Impregnated. This linear temperature detector is described as being capable of lowering the temperature because the detection temperature is determined by the melting point (or softening point) of the resin constituting the thermoplastic fiber. Further, it is described that a conductive polymer is impregnated into a thermoplastic fiber to obtain conductivity, so that it is not fragile and can be elongated.

JP2015-133319A

  However, since the linear temperature detector described in Patent Document 1 has a structure in which a thermoplastic polymer is impregnated with a conductive polymer, the conductive polymer easily peels from the thermoplastic fiber when bent, and as a result, The resistance value of the linear temperature detector is likely to vary, and the resistance value may fluctuate due to bending / vibration during use, causing malfunctions, and unexpected detection of the object may be interrupted. It was.

  An object of the present invention is to be preferably disposed in a heating device such as a water heater having a high temperature range, a heating device such as an electric blanket, a carpet, an in-vehicle seat heater, a battery, a solar panel, or the like having a low temperature range. Therefore, it is difficult to change the resistance value due to bending or vibration, and the temperature detection body used to detect abnormal heat generation or temperature rise of the detection target without malfunction and shut off the circuit provided for the detection target. Is to provide.

  (1) The temperature detector according to the present invention includes one or two or more metal-coated wires each having a fiber bundle made of a resin that contracts or melts at a predetermined temperature and a metal layer provided on the outer periphery of the fiber bundle. And an insulating coating layer covering the one or more metal-coated wires.

  According to this invention, since the fiber bundle is made of resin that shrinks or melts at a predetermined temperature, the fiber bundle shrinks or melts, and the metal layer provided on the outer periphery of the fiber bundle breaks or cuts. As a result, since the resistance value in the longitudinal direction of the metal-coated wire changes, it can function as a detector at a predetermined temperature. In particular, since a metal layer is provided on the outer periphery of the fiber bundle that is not easily affected by bending or vibration, the resistance value hardly changes due to breakage of the metal layer even when bending or vibration is applied, and the detection target is abnormal. Heat generation and temperature rise can be detected without malfunction, and the circuit provided for the detection target can be shut off. The insulating coating layer functions as a protective layer or the like, and can be applied to various types of detection objects.

  In the temperature detector according to the present invention, the metal layer is preferably a plating layer or a vapor deposition layer. According to this invention, since the metal layer is a plating layer or a vapor deposition layer, the metal layer is integrated with the fiber bundle, and even if bending or vibration is applied, the resistance value hardly changes due to breakage of the metal layer or the like.

  In the temperature detector according to the present invention, the insulating coating layer is preferably any one selected from an extruded resin layer, a tape winding layer, a film laminate layer, and a baking film layer. According to this invention, since it is protected by each insulating coating layer, the temperature detector can be laid by being wound or attached to a detection object of various shapes.

  In the temperature detection body according to the present invention, it is preferable that the fiber bundle is a fiber bundle obtained by bundling crystalline resin fiber yarns. According to this invention, by constituting the fiber bundle with fiber yarns of crystalline resin, shrinkage at a predetermined temperature is likely to occur, and the metal layer provided on the outer periphery of the fiber bundle can be easily broken. .

  In the temperature detector according to the present invention, the resin is low density polyethylene, high density polyethylene, polypropylene, polyethylene terephthalate, nylon 6, nylon 66, nylon 12, polyacetal, polybutylene terephthalate, polyphenylene sulfide, polytetrafluoroethylene, poly It is preferably selected from chlorotrifluoroethylene.

  (2) A temperature detector according to the present invention includes a metal-coated tape having a tape made of a resin that shrinks or melts at a predetermined temperature, and a metal layer provided on one or both sides of the tape, and the metal-coated tape. And an insulating coating layer covering one side or both sides.

  According to this invention, since the tape is made of a resin that shrinks or melts at a predetermined temperature, the tape shrinks or melts, and the metal layer provided on one or both sides of the tape breaks or cuts. As a result, since the resistance value in the longitudinal direction of the metal-coated tape changes, it can function as a detector at a predetermined temperature. In particular, since the metal layer is provided on a thin tape that is not easily affected by bending or vibration, even if bending or vibration is applied, the resistance value does not easily change due to breakage of the metal layer, etc. It is possible to detect an increase in temperature and temperature without malfunction and shut off a circuit provided in the detection target. The insulating coating layer functions as a protective layer or the like, and can be applied to various types of detection objects.

  The temperature detector according to the present invention further includes an insulating core, the metal-coated tape is wound around an outer periphery of the insulating core, and the insulating coating layer is provided to cover the outer periphery of the metal-coated tape. It has been. According to this invention, it can be set as the temperature detection body of the aspect provided with the insulating core material.

  According to the present invention, the heating device such as a water heater having a high temperature range, an electric blanket having a low temperature range, a carpet, a heating device such as a vehicle seat heater, a battery, a solar panel, and the like are preferably disposed. Therefore, it is difficult to change the resistance value due to bending or vibration, and the temperature detection body used to detect abnormal heat generation or temperature rise of the detection target without malfunction and shut off the circuit provided for the detection target. Can be provided.

It is a cross-sectional schematic diagram which shows an example of the temperature detection body which has a metal-coated wire. It is a cross-sectional schematic diagram which shows an example of the temperature detection body which has a 2 or more metal-coated wire. It is a schematic diagram which shows an example of the temperature detection body which provided the tape winding layer on the metal-coated wire. It is a schematic diagram which shows an example of the temperature detection body which provided the film laminate layer on the metal-coated wire. It is a cross-sectional schematic diagram which shows an example of the temperature detection body which has a metal coating tape. It is a schematic diagram which shows the example which wound the metal coating tape around the insulating core material, (A) is an example of a wound melting form, (B) is the form of the temperature detection body which provided the insulating coating layer. It is a schematic diagram which shows an example which laid the temperature detection body in the detection target object.

  An embodiment of a temperature detector according to the present invention will be described with reference to the drawings. The present invention includes inventions having the same technical idea as the embodiments and drawings described below, and the technical scope of the present invention is limited only to the description of the embodiments and the drawings. It is not something.

[Temperature detector]
As a temperature detector according to the present invention, a temperature detector 10 having a metal-coated wire 3A as shown in FIGS. 1 to 4 and a temperature detector 20 having a metal-coated tape 3B as shown in FIGS. And are included. The temperature detection body 10 having the metal-coated wire 3A has one or two or more fiber bundles 1A made of a resin that contracts or melts at a predetermined temperature and a metal layer 2 provided on the outer periphery of the fiber bundle 1A. It has a metal-coated wire 3A and an insulating coating layer 4 that covers the one or more metal-coated wires 3A. On the other hand, the temperature detector 20 having the metal-coated tape 3B includes a metal-coated tape 3B having a tape 1B made of a resin that contracts or melts at a predetermined temperature and a metal layer 2 provided on one or both surfaces of the tape 1B. And an insulating coating layer 4 covering one side or both sides of the metal-coated tape 3B.

  Since the temperature detectors 10 and 20 are made of a resin in which the fiber bundle 1A or the tape 1B contracts or melts at a predetermined temperature, the fiber bundle 1A or the tape 1B contracts or melts and the outer periphery of the fiber bundle 1A. Alternatively, the metal layer 2 provided on one side or both sides of the tape 1B is broken or cut. As a result, since the resistance value in the longitudinal direction of the metal-coated wire 3A or the metal-coated tape 3B changes, it can function as a detector at a predetermined temperature. In particular, since the metal layer 2 is provided on the fiber bundle 1 or the thin tape 1B that is not easily affected by bending or vibration, even if bending or vibration is applied, the resistance value is hardly changed due to breakage of the metal layer 2, for example. The abnormal heat generation and temperature rise of the detection target object 50 as shown in FIG. 7 can be detected without malfunction, and the heat generation circuit provided in the detection target object 50 can be shut off.

  Each component will be described in detail. Below, since the component of the temperature detection body 10 which has the metal covering wire 3A and the temperature detection body 20 which has the metal coating tape 3B is common, they are demonstrated collectively.

(Fiber bundle, tape)
The fiber bundle 1A and the tape 1B are made of a resin that contracts or melts at a predetermined temperature. An example of the resin is a thermoplastic resin. The thermoplastic resin includes a crystalline resin and an amorphous resin, and any thermoplastic resin can be arbitrarily selected and used as long as it shrinks or melts at a predetermined temperature and exhibits the effects of the present invention. . Examples of the resin include polyolefin-based, polyamide-based, polyester-based, and fluororesin-based resins, and specifically, polyethylene, polypropylene, polyethylene terephthalate, polyamide, polyacetal, polybutyterephthalate, fluorine, and the like. Can be mentioned.

  Of the crystalline resin and the amorphous resin, a crystalline resin in which crystals having regularly arranged molecular chains are present and a glass transition point and a melting point are present is more preferable. By constituting the fiber bundle 1A and the tape 1B with a crystalline resin, shrinkage at a predetermined temperature is likely to occur, and the metal layer 2 provided on the fiber bundle 1A and the tape 1B can be easily broken or cut. . Crystalline resins include low density polyethylene (melting point 95-130 ° C), high density polyethylene (melting point 120-140 ° C), polypropylene (melting point 168 ° C), polyethylene terephthalate (melting point about 255 ° C), nylon 6 (polyamide, melting point) 225 ° C.), nylon 66 (polyamide, melting point 265 ° C.), nylon 12 (polyamide, melting point 176 ° C.), polyacetal (acetal resin, melting point 181 ° C.), polybutylene terephthalate (melting point 232-267 ° C.), polyphenylene sulfide (melting point 290) ° C), polytetrafluoroethylene (melting point: about 327 ° C), polychlorotrifluoroethylene (melting point: 220 ° C), and the like.

  The resin may contain an anti-aging agent or the like as necessary. The fiber bundle 1A and the tape 1B made of a resin containing an anti-aging agent or the like can prevent thermal deterioration in an environment in which the fiber bundle 1A and the tape 1B are used for a long time in a high temperature environment below the detection temperature. Examples of the antiaging agent include phenol, hydroquinone, amine, phosphorus, and benzimidazole.

  The fiber bundle 1A is a linear fiber assembly in which several dozen single yarns (single fibers) are used as one yarn (fiber bundle). The fiber bundle 1A may be non-twisted in which the fibers are aligned, or may be a twisted fiber. Examples of fiber bundles include spun yarns (short fiber yarns) twisted with staples (short fibers) and multifilaments (long fiber yarns) twisted with filaments (long fiber yarns). From the viewpoint of tensile strength, multifilaments Is preferably used. The total fineness of the fiber bundle 1A is arbitrarily set according to the allowable current in the usage application of the temperature detector according to the present invention, but is preferably in the range of 200 to 10,000 dtex. The fineness (single fineness) of the single fiber to be used is not particularly limited, but is preferably in the range of 0.5 to 30 dtex, for example. The fineness (dtex) is the mass of a 10000 m yarn expressed in grams, and the fineness (D) is the mass of a 9000 m yarn expressed in grams.

  “Shrinkage” means that the resin softens and shrinks at a predetermined temperature. In order for the metal layer 2 to be broken or cut by the shrinkage of the resin, the shrinkage rate (length after shrinkage / length before shrinkage). Is preferably shrinkage of 5% or more. Examples of the shrinkable resin include the crystalline resins described above. The term “melting” means that the resin is softened and flows at a predetermined temperature. In order for the metal layer 2 to be broken or cut by melting the resin, it is about 5 to 60 g / 10 min. It is preferable to flow.

(Metal layer)
The metal layer 2 is provided on the surface of the fiber bundle 1A and one side or both sides of the tape 1B. As a material of the metal layer 2, copper, silver, tin, nickel, or alloys thereof are preferable. The thickness of the metal layer 2 is preferably designed to be a thickness that can be broken or cut by shrinkage or melting of the resin, and can be arbitrarily determined according to the material / thickness of the fiber bundle 1A, the material / thickness of the tape 1B, etc. For example, it is preferably selected from a range of about 0.1 to 5 μm. By setting the thickness within this range, the fiber bundle 1A and the tape 1B contract or melt at a predetermined temperature, and the metal layer 2 is broken or cut, so that the conductivity in the longitudinal direction is easily cut off. If the thickness of the metal layer 2 is less than 0.1 μm, the metal layer 2 is too thin and may be broken or cut only by vibration or bending applied to the temperature detectors 10 and 20, and is likely to be somewhat unstable. On the other hand, if the thickness of the metal layer 2 exceeds 5 μm, the metal layer 2 can be easily broken or cut even when the predetermined temperature is applied to the fiber bundle 1A or the tape 1B and the constituent resin contracts or melts. May be difficult. A preferred thickness is 1 to 2 μm.

  The metal layer 2 is preferably a plating layer or a vapor deposition layer. The metal layer 2 formed of a plating layer or a vapor deposition layer is integrated with the fiber bundle 1A and the tape 1B, and even if bending or vibration is applied, the resistance value hardly changes due to the fracture of the metal layer 2 or the like. The plating layer may be formed by electroless plating, or may be formed thicker by electrolytic plating after being formed by electroless plating. In electroless plating, for example, a metal layer having a thickness of about 0.1 to 1 μm is easy to form. However, since the deposition rate is slower than that of electrolytic plating (also referred to as electroplating), the thickness is, for example, 1 μm or more. It may take some time to do. In such a case, the metal layer 2 formed by electroless plating can be further thickened by electrolytic plating.

  The electroless plating solution and reducing means used for electroless plating are not particularly limited, and various conventionally known plating solutions and means may be applied. For example, a known electroless plating copper plating solution, electroless silver plating solution, electroless tin plating solution, electroless nickel plating solution or the like can be used. Moreover, the electroplating solution and plating conditions used for electroplating are not particularly limited, and various conventionally known plating solutions and conditions may be applied. For example, a known electrolytic plating copper plating solution, electrolytic silver plating solution, electrolytic tin plating solution, electrolytic nickel plating solution or the like can be used. Before performing electroless plating, the surface of the fiber bundle 1A or tape 1B may be optionally subjected to surface treatment such as plasma treatment or supercritical fluid treatment for improving the adhesion to the fiber bundle 1A or tape 1B. Good.

  Electroless plating can be performed by continuously running the fiber bundle 1A and the tape 1B in an electroless plating solution set to predetermined plating conditions. Electroplating can be performed by supplying power while continuously running the fiber bundle 1A and the tape 1B after electroless plating in an electrolytic plating solution set to predetermined plating conditions. Since such means are known, the description thereof is omitted here. In addition, surface treatments such as plasma treatment and supercritical fluid treatment are performed by a plasma irradiation apparatus or a supercritical fluid treatment apparatus before electroless plating, and thereafter, electroless plating is performed.

  Even when the metal layer 2 is a vapor deposition layer, the metal layer 2 may be further thickened by electrolytic plating after being deposited on the surface of the fiber bundle 1A or the tape 1B by vapor deposition means. Moreover, after forming into a film with the vapor deposition means on the surface of the fiber bundle 1A or the tape 1B, electroless plating may be performed, and then the electroplating may be performed to thicken the metal layer 2. The means for forming the vapor deposition layer is not particularly limited, and any conventionally known means for forming a vapor deposition layer on the fiber bundle 1A or tape 1B made of resin can be arbitrarily applied. The thickness of the metal layer 2 formed by vapor deposition is often thinner than the layer of the metal layer 2 formed by electroless plating, and is, for example, about 0.05 μm to 0.5 μm. Therefore, when the metal layer 2 is formed by vapor deposition, electroless plating or electrolytic plating is preferably performed thereafter to form the metal layer 2 having the above thickness. Note that the tape 1B may be a tape or a sheet having a predetermined width after being plated or deposited on a wide film or sheet.

(Metal-coated wire, metal-coated tape)
As described above, the metal-coated wire 3A is configured by providing the metal layer 2 on the surface of the fiber bundle 1A. The temperature detectors 10A, 10C, and 10D shown in FIGS. 1, 3, and 4 are configured by one metal-coated wire 3A. The temperature detector 10B shown in FIG. 2 is composed of two or more metal-coated wires 3A. When the temperature detection body 10B is configured by two or more metal-coated wires 3A, the two or more metal-coated wires 3A are configured by being aligned or twisted. “Aligning” means aligning a plurality of metal-coated wires 3A in parallel without twisting, and “twisting” means twisting a plurality of metal-coated wires 3A, for example, a single yarn twist , Arbitrary twist forms such as twin-twist twist, triple-twist twist (or higher twist), and the like can be given. The “plurality” is arbitrarily designed according to the intended use and is not particularly limited, but is preferably about 2 to 7, for example.

  As described above, the metal-coated tape 3B is configured by providing the metal layer 2 on the surface of the tape 1B. In the temperature detectors 20A and 20B shown in FIG. 5 and FIG. 6, the metal layer 2 is provided on one side, but may be provided on both sides. In addition, from the viewpoint of easy manufacture, the metal layer 2 is preferably provided on the entire surface (one side or both sides) to be provided, but is provided in the longitudinal direction in one or more strips having an arbitrary width. It may be provided in the longitudinal direction so that the width changes regularly or irregularly.

  Since the metal-coated wire 3A and the metal-coated tape 3B are made of a resin in which the fiber bundle 1A or the tape 1B contracts or melts at a predetermined temperature, the fiber bundle 1A or the tape 1B contracts or melts to produce the fiber bundle 1A. Or the metal layer 2 provided on the tape 1B is broken or cut. As a result, the resistance value in the longitudinal direction of the metal-coated wire 3A and the metal-coated tape 3B changes, and can function as a detector at a predetermined temperature. In particular, since the metal layer 2 is provided on the fiber bundle 1A and the thin tape 1B that are not easily affected by bending and vibration, even if bending or vibration is applied, the resistance value hardly changes due to the breakage of the metal layer 2 or the like. Abnormal heat generation and temperature rise of the target object 50 can be detected without malfunction, and a circuit provided in the detection target object 50 can be shut off.

(Insulation coating layer)
In the temperature detector 10 having the metal-coated wire 3A as shown in FIGS. 1 to 4, the insulating coating layer 4 is provided so as to cover one or two or more metal-coated wires 3A. Moreover, in the temperature detection body 20 which has the metal coating tape 3B as shown in FIG.5 and FIG.6, it is provided so that one side or both surfaces of the metal coating tape 3B may be covered. The insulating coating layer 4 protects the metal-coated wire 3A and the metal-coated tape 3B, and acts so as to be laid on a detection object 50 having various shapes as the temperature detection bodies 10 and 20, as shown in FIG. The constituent resin of the insulating coating layer 4 can be selected and used as a resin suitable for the forming means, and is not particularly limited, and examples thereof include a vinyl chloride resin, a polyolefin resin, and a fluorine resin. . Although the thickness of the insulating coating layer 4 is not particularly limited as long as it is a thickness suitable for the forming means, for example, it can be within a range of 0.01 to 1 mm. By covering the metal-coated wire 3A and the metal-coated tape 3B with such an insulating coating layer 4, the whole can be made into an integral structure. For example, various temperature detectors 10 and 20 with a protective insulating coating layer can be used. It is available in the usage form.

  Examples of the form of the insulating coating layer 4 include an extruded resin layer, a baking film layer, a tape winding layer, and a film laminate layer as described below. 1, 2, and 6 (B) may be any one selected from these. FIG. 3 is an example of a tape winding layer, and FIGS. 4 and 5 are examples of a film laminate layer. In addition, the code | symbol 4 of an insulation coating layer is used suitably for a tape and a laminate film.

  The extruded resin layer is a layer obtained by melting and extruding a resin with an extrusion apparatus, and the baking film layer is a layer provided by repeatedly applying and drying with a resin paint. As these constituent resins, known resins can be arbitrarily selected and used according to each method, and examples thereof include polyvinyl chloride resin (PVC), polyurethane resin, polyester resin, and fluorine resin. . Also, ethylene-tetrafluoroethylene copolymer (ETFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), fluorinated resin copolymer (perfluoroalkoxy fluororesin: PFA), polyetheretherketone (PEEK), polyethylene terephthalate (PET), polyamide (PA) and the like. The extruded resin layer and the baking film layer may be a single layer or a laminate. In the case of a laminated form, the same or different resin layers may be provided. The thickness of the extruded resin layer and the baked film layer is not particularly limited regardless of whether it is a single layer or a laminated layer. Usually, the extruded resin layer is preferably 50 μm or more, and the baked film layer is preferably 10 μm or more. .

  As shown in FIG. 3, one or two or more tapes 4 are used for the tape winding layer. When two or more tapes 4 are used, it is preferable to provide an adhesive layer 4b on at least one tape 4, and the tapes are preferably bonded and fixed by the adhesive layer 4b. For example, the first tape 4 provided with the adhesive layer 4b is provided by horizontal winding or vertical attachment with the adhesive layer 4b side facing away from the metal-coated wire 3A side, Another tape 4 can be horizontally wound or vertically attached, and the two tapes can be bonded to form a tape winding layer. The tape winding means can be various means and is not limited to the above winding means. The material of the tape is not particularly limited, but polyethylene naphthalate (PEN), polyimide (PI), polyphenylene sulfide (PPS), ethylene-tetrafluoroethylene copolymer (ETFE), tetrafluoroethylene-hexafluoropropylene copolymer Examples thereof include a polymer (FEP), a fluorinated resin copolymer (perfluoroalkoxy fluororesin: PFA), polyether ether ketone (PEEK), polyethylene terephthalate (PET), and polyamide (PA). The thickness of the tape is usually in the range of about 4 μm or more and 25 μm or less, and the width of the tape is usually in the range of about 2 mm or more and 20 mm or less. When two or more tapes are used, the thickness and width of each tape may be the same or different. In addition, the adhesive layer 4b provided in a tape can mention the adhesive which solidifies with a heat | fever or ionizing radiation. The adhesive that is bonded and solidified by heat is a heat-fusible material, and examples thereof include heat-bonding adhesives such as polyester, acrylic, and epoxy. Examples of the adhesive that is solidified by ionizing radiation (for example, ultraviolet rays) include acrylic and epoxy ionizing radiation adhesives.

  The film laminate layer is a layer that can be bonded by heat sealing, and can be bonded by sandwiching the metal-coated wire 3A between two laminate films 4 as shown in FIG. Further, as shown in FIG. 5, the metal-coated tape 3B can be sandwiched between two laminated films and bonded together. These laminate films 4 have a film substrate 4a and an adhesive layer 4b. Examples of the film substrate 4a include polyethylene naphthalate (PEN), polyimide (PI), polyphenylene sulfide (PPS), ethylene-tetrafluoroethylene copolymer (ETFE), and tetrafluoroethylene-hexafluoropropylene copolymer. Examples thereof include a polymer (FEP), a fluorinated resin copolymer (perfluoroalkoxy fluororesin: PFA), polyether ether ketone (PEEK), polyethylene terephthalate (PET), and polyamide (PA). Examples of the adhesive layer 4b include polyester-based, acrylic-based, and epoxy-based heat-bonding adhesive materials. The adhesive layer 4b is provided on one surface of the film substrate 4a with a predetermined thickness depending on the type of adhesive. The thickness of the adhesive layer 4b is not particularly limited as long as it is sufficient to attach and solidify the two laminated films 4 and is, for example, in the range of about 1 μm or more and 10 μm or less. The adhesive layer 4b is usually provided on the entire surface of the laminate film to be formed. If the cost is not taken into consideration, it can be provided on a part of the laminate film.

  The resin constituting the adhesive layer 4b is preferably composed of a resin that contracts or melts at a predetermined temperature, similar to the fiber bundle 1A and the tape 1B described above. When the resin material of the adhesive layer 4b is a thermoplastic resin that shrinks or melts at the same or similar temperature as the fiber bundle 1A or the tape 1B, when a predetermined temperature is applied, the thermoplastic resin shrinks. Alternatively, the metal layer 2 sandwiched between the fiber bundle 1A or tape 1B and the adhesive layer 4b is broken or cut by melting. As a result, since the resistance value in the longitudinal direction of the metal-coated wire 3A or the metal-coated tape 3B changes, it can function as a detector at a predetermined temperature. Preferred examples of the adhesive layer 4b include polyethylene terephthalate (melting point: about 255 ° C.), polybutylene terephthalate (melting point: 232 to 267 ° C.), and the like.

(Temperature detector)
As illustrated in FIG. 7, the temperature detection bodies 10 and 20 are laid around the detection target object 50 so as to be wound around. The temperature detectors 10 and 20 can detect an abnormality due to an increase in resistance value based on breakage or cutting of the metal layer 2 due to abnormal heat generation or temperature rise of the detection object 50. In addition, as an electric current applied to the temperature detection bodies 10 and 20, it is preferable that it is about 1-3A. FIG. 7 shows an example in which a hot water heater is used as the detection object 50. Reference numerals 51 and 52 are heat exchangers, reference numeral 53 is a burner, reference numeral 54 is a fan, reference numeral 55 is a controller board, and reference numeral 56 is an outer case. is there.

  Since the temperature detectors 10 and 20 have the metal layer 2, there are no problems such as variations in resistance values caused by peeling of the conductive polymer, changes in resistance at the time of bending, and unexpected conduction interruptions as in the prior art. There is an advantage. Further, since it is composed of the metal-coated wire 3A and the metal-coated tape 3B, it is resistant to bending, impact, vibration, etc., and the minimum bending radius is smaller than that in the case of the above-mentioned Patent Document 1, and disconnection or breakage is hardly caused by bending. There is also an advantage. Further, since the metal layer 2 is formed by plating or vapor deposition, the close contact between the fiber bundle 1A made of resin and the metal layer 2 is good, and as a result, when the resin contracts or melts and the resin moves, The metal layer 2 is easily broken or cut.

(Application examples)
As an application example, as shown in FIG. 6, a temperature detection body 20 </ b> B having an insulating core material 5 may be used. The example of FIG. 8 further includes an insulating core 5, and the metal-coated tape 1 </ b> B is wound around the outer periphery of the insulating core 5, and the insulating coating layer 4 is provided so as to cover the outer periphery of the metal-coated tape 1 </ b> B. ing. In this example, the overall strength can be increased by using the insulating core material 5 having a high strength.

  Examples of the material for the insulating core material 5 include high density polyethylene, low density polyethylene, linear low density polyethylene, ultrahigh molecular weight polyethylene, polypropylene, vinylidene fluoride, ethylene-tetrafluoroethylene copolymer, polyamide 12, and polyamide. 11, polyamide 6, polyamide 66, polybutylene terephthalate, polyethylene terephthalate, polyacetal, polyvinyl alcohol copolymer, polyvinylidene chloride, polyvinyl chloride, polyacrylonitrile, polyketone, polyurethane, polyphenylene sulfide, PEEK, polyethylene naphthalate, polylactic acid, Examples include polycaprolactone. The insulating core material 5 is preferably a monofilament. A monofilament is a thread composed of a single long fiber (filament).

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

[Example 1]
As the fiber bundle 1A, a polypropylene resin fiber having a total fineness of 1000 dtex and a single fiber diameter of 20 μm (trade name: Simtex, melting point: 180 ° C., manufactured by Ube Eximo Co., Ltd.) was used. An electroless copper plating layer having a thickness of about 1 μm was formed on the fiber bundle 1A by electroless plating to obtain a metal-coated wire 3A. The outer periphery was covered with PFA as an insulating coating layer 4 to a thickness of 0.15 mm by extrusion. Thus, the temperature detector 10 having the form shown in FIG. 1 was produced.

[Example 2]
Seven metal-coated wires 3A of Example 1 were twisted, and further, PFA was covered as an insulating coating layer 4 on the outer periphery thereof by an extrusion method to a thickness of 0.15 mm. Thus, the temperature detector 10 having the form shown in FIG. 2 was produced.

[Example 3]
The temperature detector of Example 3 was the same as Example 1 except that the fiber bundle 1A was changed from polypropylene resin fiber to polyarylate resin fiber (manufactured by Kuraray Co., Ltd., trade name: Vectran, melting point: 250 ° C.). 10 was produced.

[Example 4]
The temperature detector of Example 4 was the same as Example 1 except that the fiber bundle 1A was changed from polypropylene resin fiber to polyester resin fiber (trade name: Tetron, melting point: 250 ° C., manufactured by Toray DuPont Co., Ltd.). 10 was produced.

[Example 5]
The fiber bundle 1A was changed to a polypropylene resin fiber having a total fineness of 4000 dtex and a single fiber diameter of 20 μm (trade name: Simtex, melting point: 180 ° C., manufactured by Ube Eximo Co., Ltd.). Otherwise, the temperature detector 10 of Example 5 was produced in the same manner as Example 1.

[Example 6]
A polyester resin tape with aluminum (aluminum thickness: 10 μm, film thickness: 25 μm, manufactured by Daido Processing Co., Ltd.) is used as the metal-coated tape 3B, and a tape made of polyester resin is used as the insulating coating layer 4 on the outer periphery of the metal-coated tape 3B. Were bonded from both sides. Thus, the temperature detector 20 of Example 6 shown in FIG. 5 was produced.

[Example 7]
As the insulating core material 5, a 1100 dtex filament made of polyarylate resin (manufactured by Kuraray Co., Ltd., trade name: Vectran) was used. The temperature detection body 20 obtained in Example 6 was taped on this insulating core material 5 at a pitch twice the width to obtain the temperature detection body 20 of Example 7 shown in FIG.

[Measurement]
The measurement measured the surface temperature of the heating device and the resistance value of the temperature detector when the temperature of the temperature detector of Examples 1 to 7 was raised in the heating device in which a part of the temperature detector was brought into close contact. The resistance value was measured for a plurality of samples (n = 10) when a tester was connected to both ends of the temperature detector and the temperature of the heating device was raised in that state.

[result]
In the temperature detectors of Examples 1, 2, and 5, there was no change up to 180 ° C., but at 210 ° C., the resistance values of all the samples were over-measured and there was no conduction. In the temperature detector of Example 3, there was no change up to 180 ° C., but when it exceeded 180 ° C., the resistance value of some samples exceeded measurement, and the resistance value of all samples exceeded measurement at 270 ° C. . In the temperature detector of Example 4, there was no change up to 250 ° C., but at 270 ° C., the resistance values of all the samples exceeded the measurement. In the temperature detectors of Examples 6 and 7, there was no change up to 250 ° C., but at 270 ° C., the resistance values of all the samples exceeded the measurement. Then, although the temperature detection body of Examples 1-7 was cooled to room temperature, it was a state with no resistance with the resistance value still being over. From these results, it was confirmed that each of the temperature detectors of Examples 1 to 7 changed in resistance value at a temperature corresponding to the constituent resin. This change in resistance value is caused by the resin contraction and the metal layer 2 being broken or cut. Therefore, it was confirmed that the temperature could be detected by the constituent resin of the fiber bundle 1A or the tape 1B of the temperature detector.

1A Fiber bundle 1B Tape 2 Metal layer 3A Metal-coated wire 3B Metal-coated tape 4 Insulating coating layer 4a Film base 4b Adhesive layer 5 Insulating core 10, 20 Temperature detector 10A, 10B, 10C, 10D Temperature detecting body 20A, 20B Temperature detecting body having metal-coated tape 50 Object to be detected (water heater)
51,52 Heat exchanger 53 Burner 54 Fan 55 Controller board 56 Exterior case

Claims (7)

  One or two or more metal-coated wires having a fiber bundle made of a resin that shrinks or melts at a predetermined temperature and a metal layer provided on the outer periphery of the fiber bundle, and the one or more metal-coated wires A temperature sensing element comprising an insulating coating layer covering the wire.   The temperature detector according to claim 1, wherein the metal layer is a plating layer or a vapor deposition layer.   The temperature detector according to claim 1 or 2, wherein the insulating coating layer is any one selected from an extruded resin layer, a tape winding layer, a film laminate layer, and a baking film layer.   The temperature detector according to any one of claims 1 to 3, wherein the fiber bundle is a fiber bundle in which fiber yarns of crystalline resin are bundled.   The resin is selected from low density polyethylene, high density polyethylene, polypropylene, polyethylene terephthalate, nylon 6, nylon 66, nylon 12, polyacetal, polybutylene terephthalate, polyphenylene sulfide, polytetrafluoroethylene, polychlorotrifluoroethylene, Item 5. The temperature detector according to any one of Items 1 to 4.   A metal-coated tape having a tape made of a resin that shrinks or melts at a predetermined temperature and a metal layer provided on one or both surfaces of the tape, and an insulating coating layer that covers one or both surfaces of the metal-coated tape, A temperature detector characterized by that. The insulating core is further provided, the metal-coated tape is wound around an outer periphery of the insulating core, and the insulating coating layer is provided so as to cover the outer periphery of the metal-coated tape. Temperature detector.

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