TWI709980B - Long-acting anti-rodent and anti-termite cable - Google Patents

Abstract

A long-acting anti-rodent and anti-termite cable includes at least one core cable and protective cover. The protective cover mainly includes a cover layer and a multifunctional protective layer. The cover layer has an outer surface and an inner surface opposite to the outer surface. The cover layer is a rigid plastic layer having a Shore D hardness greater than 60, a metal layer or a metal-reinforced rigid plastic layer. The multifunctional protective layer is disposed on the outer surface of the cover layer and contains an organic polysilazane. The protective cover does not contain any toxic substance and has high physical strength for preventing from being bitten by rodents and termites. Therefore, the cable of the present disclosure has a long service life and is safe and reliable in use.

Description

Long-lasting anti-rodent and ant cable

The invention relates to a cable structure, in particular to a long-lasting anti-rodent and ant cable, and its application range includes at least medium and high voltage cables, robot cables, electric cables for electric people and land cables for wind power generation systems.

The existing power cable mainly includes a cable core and a coating layer covering the cable core. The coating layer is generally formed of plastic, rubber or thermoplastic elastomer, which is difficult to resist the bite of rodents (such as mice) and termites. For power cables located outdoors (such as buried in the ground), the coating is more likely to be damaged by rodents and termites. Once the coating is damaged, the inner cable core will be exposed directly; in this way, it is easy A short-circuit accident occurs, resulting in a sudden power outage, which may cause major safety accidents and economic losses in severe cases.

In order to prevent the cable coating from being damaged by gnawing, a common protective measure is to add repellents and/or insecticides to the coating or coat the surface of the coating, so that the coating is harmful to mice, termites, etc. Taste, smell, or other characteristics (such as stickiness) that creatures hate or fear. Although such protective measures can reduce the damage to cables by harmful organisms such as mice and termites, its impact on the outdoor environment, such as high temperature, humidity, ultraviolet light, acid rain erosion, dust friction, etc., cannot provide long-term effective protection. , And these effects will cause the cable’s anti-rat and ant effect to be reduced.

Therefore, how to solve the problems existing in the existing cable structure to complete a cable with both normal use and anti-rodent and ant functions is actually one of the focuses of attention by those skilled in the art.

The technical problem to be solved by the present invention is to provide a long-term rodent-proof and ant-proof cable suitable for outdoor use and capable of ensuring safe and stable power transmission in view of the deficiencies of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a long-term rodent-proof and ant-proof cable, which includes at least one cable core and a coating layer covering at least one of the cable cores. The covering layer includes an inner covering layer and a first multifunctional protective layer, the inner covering layer has an outer surface and an inner surface opposite to each other, and the first multifunctional protective layer is disposed on the inner covering layer The outer surface; wherein the inner covering layer is a hard plastic layer with a hardness (Shore D) greater than 60, a metal layer or a metal-reinforced hard plastic layer, and the first multifunctional protective layer contains organopolysilicon nitrogen alkyl.

In an embodiment of the present invention, the inner covering layer is a rigid plastic layer, which is formed of medium-density polyethylene, high-hardness special polyolefin copolymer, nylon or semi-rigid polyvinyl chloride.

In an embodiment of the present invention, the inner covering layer is a metal layer, which is formed by wrapping a metal tape; wherein, the metal tape has a thickness between 400 N/mm ² and 800 N/mm ² The tensile strength and the hardness (HV) between 100 and 240.

In an embodiment of the present invention, the inner covering layer is a metal-reinforced hard plastic layer, which is a combination of a hard plastic layer and a metal layer; wherein, the hard plastic layer is medium density polyethylene, high It is made of special hardness polyolefin copolymer, nylon or semi-rigid polyvinyl chloride. The metal layer is wrapped by a metal belt, and the metal belt has a range of 400 N/mm ² to 800 N/mm ² Tensile strength between 100 and 240 and hardness (HV) between 100 and 240.

In an embodiment of the present invention, the hard plastic layer is disposed on the inner side of the metal layer.

In an embodiment of the present invention, the metal layer is disposed inside the hard plastic layer.

In an embodiment of the present invention, the content of the organopolysilazane in the first multifunctional protective layer is 1-40% by weight.

In an embodiment of the present invention, the first multifunctional protective layer further contains 35 to 79 weight percent of base resin, 5 to 10 weight percent of fluoropolymer, and 10 to 20 weight percent of inorganic filler.

In an embodiment of the present invention, in the first multifunctional protective layer, the base resin is acrylic resin, epoxy resin or a combination thereof, and the fluoropolymer is Teflon The inorganic filler includes 5 to 10 weight percent of talc and 5 to 10 weight percent of silicon dioxide.

In an embodiment of the present invention, the long-lasting rodent-proof cable further includes a second multifunctional protective layer, which is disposed on the inner surface of the inner covering layer and contains organopolysilazane.

In an embodiment of the present invention, the content of the organopolysilazane in the second multifunctional protective layer is 1-40% by weight.

In an embodiment of the present invention, the second multifunctional protective layer further contains 35 to 79 weight percent of base resin, 5 to 10 weight percent of fluoropolymer, and 10 to 20 weight percent of inorganic filler.

In an embodiment of the present invention, in the second multifunctional protective layer, the base resin is acrylic resin, epoxy resin or a combination thereof, and the fluoropolymer is Teflon The inorganic filler includes 5 to 10 weight percent of talc and 5 to 10 weight percent of silicon dioxide.

In an embodiment of the present invention, the long-lasting rodent-proof cable further includes an outer covering layer disposed on an outer surface of the first multifunctional protective layer.

One of the beneficial effects of the present invention is that the long-lasting rodent-proof cable of the present invention can pass through "the coating layer includes an inner covering layer and a first multifunctional protective layer arranged on the outer surface of the inner covering layer, wherein The inner covering layer is a hard plastic layer with a hardness (Shore D) greater than 60, a metal layer or a metal-reinforced hard plastic layer, and the first multifunctional protective layer contains organic polysilazane" technical solution to effectively resist mice and The bite of termites and other harmful organisms, as well as improve the environmental tolerance of cables. Therefore, the service life of the cable can be extended and a safe and stable power supply can be ensured.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

When the cable is used outdoors, it is often bitten by harmful organisms such as mice and termites. Once the cable's insulation coating is bitten through, it will cause a sudden power failure and may even cause a major safety accident. In addition, high temperature, humidity, ultraviolet light exposure, acid rain erosion, dust friction and other environmental impacts will reduce the service life of the cable. Therefore, the present invention provides a long-lasting anti-rodent and ant cable, which can resist the bite of harmful organisms such as rats and termites in a non-toxic and environmentally friendly manner, effectively protect the insulating coating from damage, and has strong environmental tolerance. .

The following are specific examples to illustrate the implementation of the "long-acting anti-rodent and ant cable" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as “first”, “second”, and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

Referring to FIG. 1 and in conjunction with FIGS. 2 to 5, the long-lasting rodent-proof cable Z according to the first embodiment of the present invention includes at least one cable core 1 for transmitting electrical signals and a coating layer 2 covering the cable core 1 The covering layer 2 includes an inner covering layer 21 and a first multifunctional protective layer 22, wherein the inner covering layer 21 has an opposite outer surface 211 and an inner surface 212, and the first multifunctional protective layer 22 is provided in the inner covering Layer 21 on the outer surface 211. When in use, the inner cover layer 21 has high hardness, and can avoid being bitten by harmful organisms such as mice and termites; the first multifunctional protective layer 22 has at least good water and gas resistance, high temperature resistance, chemical resistance, Wear resistance and weather resistance, and can improve the resistance of the cable to the outdoor environment, that is, improve the outdoor environment adaptability of the cable.

In this embodiment, according to different uses, the long-term rodent-proof cable Z may include only one cable core 1, as shown in FIG. 1, or may include three or more cable cores 1, as shown in FIG. When the number of cable cores 1 is three or more, there may be fillers 3 (such as various forms of polyethylene, polypropylene, and polyvinyl chloride recycled materials) between the cable core 1 and the coating layer 2 to keep the cable Structural integrity. Furthermore, the cable core 1 includes a conductor 11 and an insulating layer 12 covering the conductor 11; the conductor 11 may be a plurality of wires with the same diameter (such as copper wires) formed by concentric stranding or bundle stranding. The insulating layer 12 can be formed by extrusion molding using an insulating material. However, these details are only for describing possible embodiments of the cable core 1 and not for limiting the present invention.

The hardness (Shore D) of the inner covering layer 21 is greater than 60, preferably greater than 63, and more preferably greater than 65; the thickness of the inner covering layer 21 may be 0.5 mm to 15 mm. Furthermore, as shown in FIG. 3, the inner covering layer 21 can be a hard plastic layer, which can be formed by extrusion molding; in terms of physical properties, processability and environmental protection, the hard plastic layer is preferably medium density polyethylene (medium density polyethylene, MDPE), high hardness special polyolefin copolymer (Termigon), nylon (such as nylon 6 and nylon 12) or semi-rigid polyvinyl chloride.

In addition, as shown in FIG. 4, the inner covering layer 21 may also be a metal layer. In this embodiment, the metal layer is in the form of a cladding layer, that is, it is formed by spirally winding at least one metal tape (not shown), but it is not limited to this; the metal tape may have a thickness of between 400 N/mm ² Tensile strength between 800 N/mm ² and preferably between 400 N/mm ² and 500 N/mm ² and hardness (HV) between 100 and 240, preferably It is between 100 and 200; as the metal belt forming the metal layer, brass belts (or copper-zinc alloy belts), zinc-copper alloy belts and steel belts can be cited.

In addition, as shown in FIGS. 5 and 6, the inner covering layer 21 can also be a metal-reinforced hard plastic layer. In this embodiment, the metal-reinforced hard plastic layer is a combination of a hard plastic layer 21a and a metal layer 21b, but it is not limited to this; the technical features and implementation methods of the hard plastic layer 21a and the metal layer 21b have been described In the previous paragraph, it will not be repeated here. In practical applications, the position of the hard plastic layer 21a can be closer to the cable core 1 than the position of the metal layer 21b, that is, the hard plastic layer 21a is arranged inside the metal layer 21b, as shown in FIG. 5, or the position of the metal layer 21b can be The position of the hard plastic layer 21a is closer to the cable core 1, that is, the metal layer 21b is arranged inside the hard plastic layer 21a, as shown in FIG. 6. In some embodiments, the metal-reinforced hard plastic layer 21a may be a hard plastic layer containing a metal-reinforced material.

It is worth noting that the first multifunctional protective layer 22 contains organopolysilazane, which has Si-N-Si bonds and Si-O-Si bonds in its molecular structure, so it has excellent protection capabilities and can prevent external moisture. And gas intrusion, and endure harsh weather conditions, chemical corrosion and external wear. The organopolysilazane can be selected from commercially available Durazane ^® series products, preferably Durazane ^® 1500 rapid cure, but not limited thereto. In addition, in the presence of the first multifunctional protective layer 22, the metal layer (ie, the inner cover layer or a part thereof) will not be oxidized and rusted because it is difficult to contact water vapor and air, which can extend the service life of the cable.

Furthermore, the content of the organopolysilazane can be 1-40% by weight; in practical applications, the first multifunctional protective layer 22 can be formed by impregnation or spraying, and the thickness of the first multifunctional protective layer 22 can be 0.005 mm to 2.0 mm; if the thickness of the first multifunctional protective layer 22 is less than 0.005 mm, the aforementioned protective effect is not obvious, and if the thickness of the first multifunctional protective layer 22 exceeds 2.0 mm, the production cost will increase.

In terms of cost, processability and protection capability, the first multifunctional protective layer 22 may further contain 35 to 79 weight percent of base resin, 5 to 10 weight percent of fluoropolymer, and 10 to 20 weight percent of inorganic filler. ; The base resin is acrylic resin, epoxy resin or a combination thereof, the fluoropolymer is Teflon (Teflon), and the inorganic filler includes 5 to 10 weight percent of talc and 5 to 10 weight percent of silicon dioxide . However, these details are only for describing possible implementations of the first multifunctional protective layer 22 and are not intended to limit the present invention.

[Second Embodiment]

Referring to FIG. 1 and in conjunction with FIGS. 7 to 10, the long-term rodent-proof cable Z according to the second embodiment of the present invention includes at least one cable core 1 for transmitting electrical signals and a coating layer 2 covering the cable core 1 , Wherein the covering layer 2 includes an inner covering layer 21, a first multifunctional protective layer 22 and a second multifunctional protective layer 23. The inner covering layer 21 can be a hard plastic layer, a metal layer or a metal-reinforced hard plastic layer, which can effectively resist the bite of harmful organisms such as mice and termites; the first multifunctional protective layer 22 and the second multifunctional protective layer 23 They are respectively arranged on the outer surface 211 and the inner surface 212 of the inner covering layer 21, and both have good water and gas resistance, high temperature resistance, chemical corrosion resistance, abrasion resistance and weather resistance, which can better improve the cable Tolerance to outdoor environments. The technical features and implementation of the cable core 1, the inner covering layer 21 and the first multifunctional protective layer 22 have been described in the first embodiment, so they will not be repeated here.

In this embodiment, the composition of the second multifunctional protective layer 23 is substantially the same as that of the first multifunctional protective layer 22; the second multifunctional protective layer 23 can be formed by impregnation or spraying, and the second multifunctional protective layer The thickness of 23 can be 0.005 mm to 2.0 mm; when the thickness of the second multifunctional protective layer 23 falls within this range, the production cost and the protective ability can be considered. Furthermore, the second multifunctional protective layer 23 contains organopolysilazane, wherein the content of the organopolysilazane can be 1 to 40% by weight; according to actual needs, the second multifunctional protective layer 23 can further contain 35 to 79 weight percent of base resin, 5 to 10 weight percent of fluoropolymer, and 10 to 20 weight percent of inorganic filler; wherein the base resin is acrylic resin, epoxy resin or a combination thereof, and the fluoropolymer is Teflon (Teflon), the inorganic filler includes 5 to 10 weight percent of talc and 5 to 10 weight percent of silicon dioxide. However, these details are only for describing possible implementations of the second multifunctional protective layer 23 and are not intended to limit the present invention. In some embodiments, the first and second multifunctional protective layers 22, 23 may have different compositions.

[Third Embodiment]

Referring to FIG. 1 and in conjunction with FIGS. 11 to 14, the long-lasting anti-rat and ant cable Z of the third embodiment of the present invention includes at least one cable core 1 for transmitting electrical signals and a coating layer 2 covering the cable core 1 , The covering layer 2 mainly includes an inner covering layer 21, a first multifunctional protective layer 22 and an outer covering layer 24. The inner covering layer 21 can be a hard plastic layer, a metal layer, or a metal-reinforced hard plastic layer, which can effectively resist the bite of harmful organisms such as mice and termites; the first multifunctional protective layer 22 is arranged outside the inner covering layer 21 On the surface 211, it has good water and gas resistance, high temperature resistance, chemical corrosion resistance, abrasion resistance and weather resistance, which can improve the resistance of the cable to the outdoor environment; the outer covering layer 24 is set in the first multifunctional protection The outer surface 221 of the layer 22 is used to improve the reliability of the cable. According to actual needs, the long-lasting anti-rodent and ant cable Z may further include a second multifunctional protective layer 23 disposed on the inner surface 212 of the inner covering layer 21. The technical features and implementation of the cable core 1, the inner covering layer 21 and the first and second multifunctional protective layers 22, 23 have been described in the previous embodiments, so they will not be repeated here.

In this embodiment, the material of the outer covering layer 24 can be plastic, rubber or thermoplastic elastomer, and can be formed by extrusion molding; preferably, the water absorption capacity of the inner covering layer 21 is higher than that of the outer covering layer 24. In some embodiments, the outer cover 24 may be polyvinyl chloride (PVC), polyolefins such as low density polyethylene (LDPE) and medium density polyethylene, thermoplastic polyurethane (TPU), ethylene propylene rubber (EPR ) Or chloroprene rubber (CR).

[Beneficial effects of the embodiment]

One of the beneficial effects of the present invention is that the long-lasting rodent-proof cable of the present invention can pass through "the coating layer includes an inner covering layer and a first multifunctional protective layer arranged on the outer surface of the inner covering layer, wherein The inner covering layer is a hard plastic layer with a hardness (Shore D) greater than 60, a metal layer or a metal-reinforced hard plastic layer, and the first multifunctional protective layer contains organic polysilazane" technical solution to effectively resist mice and The bite of termites and other harmful organisms, as well as improve the environmental tolerance of cables. Therefore, it can extend the service life of the cable, which can reach more than 20 years, and ensure a safe and stable power supply.

Furthermore, the multifunctional protective layer contains organopolysilazane, which has Si-N-Si bonds and Si-O-Si bonds in its molecular structure, so it has excellent protection capabilities and can prevent external moisture and gas from intruding , And endure harsh weather conditions, chemical corrosion and external wear.

Furthermore, in the presence of the multifunctional protective layer, the metal layer (ie, the inner cover layer or a part thereof) will not be oxidized and rusted because it is difficult to contact moisture and air, which can extend the service life of the cable.

The content disclosed above is only a preferred and feasible embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

Z: Long-lasting anti-rat and ant cable 1: Cable core 11: Conductor 12: Insulation layer 2: Coating layer 21: inner cover 21a: Hard plastic layer 21b: Metal layer 211: Outer surface 212: inner surface 22: The first multifunctional protective layer 221: outer surface 23: The second multifunctional protective layer 24: Outer cover 3: filler

FIG. 1 is a schematic diagram of one structure of a long-acting anti-rodent and ant cable according to an embodiment of the invention.

Fig. 2 is another structural schematic diagram of the long-lasting rodent-proof cable according to the embodiment of the present invention.

Fig. 3 is an enlarged schematic diagram of part III in Fig. 1 according to the first embodiment of the present invention.

Fig. 4 is another enlarged schematic diagram of part III in Fig. 1 according to the first embodiment of the present invention.

Fig. 5 is another enlarged schematic diagram of part III in Fig. 1 according to the first embodiment of the present invention.

Fig. 6 is another enlarged schematic diagram of part III in Fig. 1 according to the first embodiment of the present invention.

Fig. 7 is an enlarged schematic diagram of part III in Fig. 1 according to the second embodiment of the present invention.

Fig. 8 is another enlarged schematic diagram of part III in Fig. 1 according to the second embodiment of the present invention.

Fig. 9 is another enlarged schematic diagram of part III in Fig. 1 according to the second embodiment of the present invention.

Fig. 10 is another enlarged schematic diagram of part III in Fig. 1 according to the second embodiment of the present invention.

Fig. 11 is an enlarged schematic diagram of part III in Fig. 1 according to the third embodiment of the present invention.

Fig. 12 is another enlarged schematic diagram of part III in Fig. 1 according to the third embodiment of the present invention.

Fig. 13 is another enlarged schematic diagram of part III in Fig. 1 according to the third embodiment of the present invention.

Fig. 14 is another enlarged schematic diagram of part III in Fig. 1 according to the third embodiment of the present invention.

Z: Long-lasting anti-rodent and ant cable

1: Cable core

11: Conductor

12: Insulation layer

2: Coating layer

Claims (10)

A long-lasting anti-rat and ant cable comprising at least one cable core and a coating layer covering at least one of the cable cores, characterized in that the coating layer includes: An inner covering layer having an outer surface and an inner surface opposite to each other, wherein the inner covering layer is a hard plastic layer, a metal layer or a metal-reinforced hard plastic layer with a hardness (Shore D) greater than 60; and A first multifunctional protective layer is arranged on the outer surface of the inner covering layer, wherein the first multifunctional protective layer contains organic polysilazane. As described in the first item of the scope of patent application, the long-lasting rodent-proof cable, wherein the inner covering layer is a hard plastic layer, which is medium density polyethylene (medium density polyethylene), high hardness special polyolefin copolymer (Termigon ), nylon or semi-rigid polyvinyl chloride. The long-lasting anti-rodent and ant cable according to item 1 of the scope of patent application, wherein the inner covering layer is a metal layer, which is formed by wrapping a metal tape; wherein, the metal tape has a thickness of between 400 N/ The tensile strength between mm ² and 800 N/mm ² (tensile strength) and the hardness (HV) between 100 and 240. The long-lasting anti-rodent and ant cable according to item 1 of the patent application, wherein the inner covering layer is a metal-reinforced hard plastic layer, which is a combination of a hard plastic layer and a metal layer; wherein, the The rigid plastic layer is formed of medium density polyethylene, high-hardness special polyolefin copolymer (Termigon), nylon or semi-rigid polyvinyl chloride, and the metal belt has a range of 400 N/mm ² to 800 N /mm ² between tensile strength (tensile strength) and hardness between 100 to 240 (HV). The long-lasting rodent-proof and ant-proof cable according to item 4 of the scope of patent application, wherein the hard plastic layer is arranged on the inner side of the metal layer. The long-lasting rodent-proof cable according to item 4 of the scope of patent application, wherein the metal layer is arranged on the inner side of the hard plastic layer. According to the long-acting anti-rodent and ant cable according to item 1 of the scope of patent application, the content of the organopolysilazane in the first multifunctional protective layer is 1 to 40 weight percent. The long-lasting anti-rodent and ant cable according to item 7 of the scope of the patent application, wherein the first multifunctional protective layer further contains 35 to 79 weight percent of base resin, 5 to 10 weight percent of fluoropolymer, and 10 to 20 weight percent of inorganic filler. The long-lasting rodent-proof cable according to item 8 of the scope of patent application, wherein, in the first multifunctional protective layer, the substrate resin is acrylic resin, epoxy resin or a combination thereof, and the containing The fluoropolymer is Teflon, and the inorganic filler includes 5 to 10 weight percent of talc and 5 to 10 weight percent of silicon dioxide. The long-acting rodent-proof cable as described in item 7 of the scope of the patent application further includes a second multifunctional protective layer disposed on the inner surface of the inner covering layer, and the second multifunctional protective layer The protective layer has the same composition as the first multifunctional protective layer.

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