JP2007005054A - Pad for cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To aim at reduction of a volume of a pad filled in a cable overall to reduce the weight and cost of the cable. <P>SOLUTION: Plastic resin is used as a base material of the pad 5 for the cable filled in a space between a plurality of twisted core wires 4, and the purpose is realized by forming wrinkles on the base material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cable inclusion, and more particularly to a cable inclusion that can be reduced in weight and cost. Moreover, this invention relates to the inclusion for cables which can aim at weight reduction and can consider an environment.

  In transporting the cable, the cable drum is wound around the cable drum and transported by transporting the cable drum. For this reason, if 100% plastic inclusions are used for inclusions used in conventional cables, the amount of inclusions used per unit length of the cable will be very large, so the weight per unit length of the cable Becomes larger. Therefore, the weight is reduced by using wood for the cable drum. However, since there is a limit to the weight reduction, the weight reduction of the cable itself is desired in order to reduce the cable transport cost.

  In addition, if 100% plastic inclusions are used for the inclusions used in conventional cables, the amount of inclusions used per unit length of the cable becomes very large. It becomes larger and the work efficiency when laying the cable is poor.

  Therefore, it has been proposed to reduce the amount of inclusions used to reduce the weight of the cable (see, for example, Patent Documents 1 and 2).

  The invention described in Patent Document 1 has a configuration in which light specific gravity wood chips are used for a part or all of the filler of the resin composition constituting the interposition. And from this structure, the specific gravity is small and the electrical cable intervention is obtained.

In the invention described in Patent Document 2, a composition obtained by blending 30 to 200 parts by weight of an inorganic filler with respect to 100 parts by weight of a plastic recycled material is stretched to form a sheet, and then slit and folded to form a string. It has the structure formed in. And from this structure, the inclusion for cable which can aim at weight reduction, the improvement of work environment, and the improvement of recyclability is obtained.
JP-A-9-274815 (pages 2 to 3) Japanese Patent Laid-Open No. 2003-313152 (pages 2 and 3, FIGS. 1 and 3)

  However, the electrical cable intervention according to the invention described in Patent Document 1 uses wood chips as a filler compounded in the base resin, but in the future, wood is used as a raw material for the wood chips. Has the problem of depleting timber resources.

  Since the cable inclusions 24 according to the invention described in Patent Document 2 are drawn and manufactured to reduce the weight, there is a problem that the manufacturing cost tends to be high. Moreover, since the inclusion 24 for cables according to the invention described in Patent Document 2 contains an inorganic filler in the base resin, the inorganic filler can be removed from the inclusion 24 for the cable when the cable is recycled. There is a problem that this removal becomes a bottleneck in net recycling.

  An object of the present invention is to provide an inclusion for a cable that can reduce the amount of inclusions used in the entire cable to reduce the weight of the cable and reduce the cost. Another object of the present invention is to provide a cable inclusion capable of reducing the weight of the cable inclusion and considering the environment.

  The cable inclusion according to claim 1 is a cable inclusion in which a plurality of insulated wire cores are twisted and interposed in a gap between the respective wire cores, and a plastic resin is used as a base material of the inclusions. It is characterized by a structure formed with a ridge. With this configuration, an inclusion for a cable having many gaps inside can be obtained.

  The cable inclusion according to claim 2 is a cable inclusion in which a plurality of insulated wire cores are twisted and interposed in a gap between the respective wire cores, a plastic resin is used as a base material of the inclusions, and the base material is It is characterized by being formed by spinning. With this configuration, an inclusion for a cable having many gaps inside can be obtained.

  The inclusion for cable according to claim 3, wherein the plastic resin is composed of one or more of polyethylene (PE), polyethylene terephthalate (PET), and recycled polyethylene terephthalate (regenerated PET). It is characterized by.

  The cable inclusion according to claim 4 is characterized in that the plastic resin is formed by blending a filler.

  The inclusion for cable according to claim 5 is characterized in that the filler is composed of one or more of lignin, cellulose, and hemicellulose.

  The cable inclusion according to claim 6 is a cable inclusion in which a plurality of insulated wire cores are twisted and interposed in a gap between the respective wire cores, and a tree component for 100 parts by weight of plastic resin as a base material of the inclusions 1 to 200 parts by weight of a filler is blended. Here, the reason why the amount of the filler is 1 to 200 parts by weight with respect to 100 parts by weight of the plastic resin is that if the amount is less than 1 part by weight, the inclusion 25 is not sufficiently lightened, and 200 parts by weight. This is because the extrudability of the inclusions 25 deteriorates if the amount exceeds.

  The cable inclusion according to claim 7 is characterized in that the filler is composed of one or more of lignin, cellulose, and hemicellulose.

  According to invention of Claim 1, while being able to reduce in weight, the inclusion for cables which can aim at reduction of cost can be obtained.

  According to the second aspect of the present invention, it is possible to obtain a cable inclusion that can be reduced in weight and can be reduced in cost.

  Furthermore, according to the invention described in claim 3, it is possible to obtain an inclusion for a cable that can be reduced in weight and can be reduced in cost. In addition, according to the invention described in claim 3, since the recyclable material such as recycled PET is used for the plastic resin of the inclusion base material, the environment can be considered. Cable inclusions can be obtained.

  According to invention of Claim 4, while being able to reduce in weight, the inclusion for cables which can aim at reduction of cost can be obtained.

  According to the fifth aspect of the present invention, it is possible to obtain an inclusion for a cable that can be reduced in weight and can be reduced in cost. According to the invention described in claim 5, since lignin is recycled and used as the filler, it is possible to consider the environment and to reduce the manufacturing cost because lignin is an inexpensive material. A cable inclusion can be obtained.

  According to invention of Claim 6, while being able to reduce in weight, the inclusion for cables which can aim at reduction of cost can be obtained.

  According to the seventh aspect of the invention, it is possible to obtain a cable inclusion that can be reduced in weight and can be reduced in cost. Further, according to the invention described in claim 7, since lignin is recycled and used as a filler, it is possible to consider the environment and to reduce the manufacturing cost because lignin is an inexpensive material. A cable inclusion can be obtained.

  According to the present invention, in a cable inclusion that is formed by twisting a plurality of insulated wire cores and interposed in a gap between the respective wire cores, a plastic resin is used as a base material of the inclusions, and the base material is provided with ridges. Realized.

  Hereinafter, the embodiment of the cable inclusion according to the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of a cable using cable inclusions according to an embodiment of the first invention. FIG. 2 is an enlarged view of a part of the cable shown in FIG. 1, and FIG. 3 is a view showing the concept of the tape used for the cable inclusion shown in FIG.

  FIG. 1 shows a cable according to an embodiment of the first invention. The cable 1 includes an insulated wire core 4 including a conductor 2 made of annealed copper wire and an insulator 3 coated on the conductor 2. For the insulator 3, a general-purpose resin such as polyvinyl chloride or polyethylene is used.

  Inclusions 5 are provided on the insulator 3. Inclusions 5 are added to fill gaps between the insulated wire cores 4 generated when two or more insulated wire cores 4 are twisted together, so that the cross section of the cable 1 becomes substantially circular. It is a thing and is given a bag. A presser winding tape 6 is wound from above the inclusion 5, and a sheath 7 formed of polyvinyl chloride, polyethylene or the like is covered on the presser winding tape 6.

  This inclusion 5 is made of, as a base material, a general-purpose thermoplastic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), or recycled and recycled polyethylene terephthalate (recycled PET). ) Or the like, and the plastic resin does not contain a filler such as an inorganic filler or a wood chip. When recyclable materials such as recycled PET are used for this plastic resin, the environment can be further considered because these materials are excellent in recyclability. Further, the plastic resin can be easily recycled because the filler 5 such as an inorganic filler or a wood chip which becomes a neck in recycling is not blended in the inclusion 5.

  Moreover, the inclusion 5 is provided with wrinkles. This wrinkle is applied by passing a tape through a die, and is applied in either of the steps of extruding the base material plastic resin into a tape shape or manufacturing a cable. Here, it is preferable that the wrinkles be applied when manufacturing the cable. This is because when the wrinkle is applied during extrusion molding into a tape shape, the inclusion 5 may be wound up in a coil shape, so that the applied wrinkle may return to its original state.

  In this way, the reason why the inclusions 5 are provided with the wrinkles is that the gaps increase in the inclusions 5 due to the wrinkles, so that the bulkiness of the inclusions 5 increases, and the increased bulkiness of the inclusions 5 can be reduced. Because. The inclusion 5 provided with the wrinkles will be described in detail with reference to FIGS.

  FIG. 2 shows an enlarged view of a part of the cable 1 shown in FIG. FIG. 3 shows a conceptual diagram of a tape used for the inclusion 5 of the cable 1.

  In FIG. 2, the inclusion 5 is in a state of being interposed so as to fill a gap generated when the insulated wire cores 4 are twisted together. As shown in FIG. 2, the inclusion 5 is in a state in which a plurality of tapes having a structure having ridges on the front and back surfaces are overlapped. As described above, since the flanges are provided on the front and back surfaces of the tape constituting the inclusion 5, a gap A is generated at a position where the tape and the insulating core 4 come into contact with each other or a position where the tapes overlap each other. Yes.

  In FIG. 2, the gap A is indicated by hatching, but this is indicated by hatching for convenience, and the gap A indicates a space. The gap A is a space formed by overlapping a plurality of tape-like inclusions 5 with ridges on the front and back surfaces and contacting the ridge portions of the tape. In addition, a gap A is also generated at the contact portion between the tape-shaped inclusion 5 and the insulated wire core 4 that has been subjected to wrinkles due to the contact between the wrinkled portion of the tape and the insulated wire core 4. Yes.

  In addition, the wrinkles of the inclusions 5 are given to the tape used for the inclusions in either of the steps of extruding the plastic resin of the base material into a tape shape or manufacturing the cable. Therefore, wrinkles will not disappear due to changes over time or the restoring force of the tape. If wrinkles are applied after the tape is formed, the wrinkles applied to the tape may be stretched due to the passage of time or the restoring force of the tape caused by the tape being stretched. In this way, by adding wrinkles to the inclusions, the tape is not stretched, or the wrinkles of the tape do not stretch even if time elapses, and the cable 1 is filled with the gap between the tapes maintained. be able to.

  Further, it is desirable that the ridges of the inclusions 5 are provided in a direction substantially perpendicular to the insertion direction of the inclusions 5 (longitudinal direction of the tape). By comprising in this way, since the wrinkles of the inclusion 5 become bulky inside the cable 1, the amount of the inclusion 5 filled in the cable 1 can be reduced.

  The inclusions 5 thus provided with wrinkles are twisted and filled simultaneously with a plurality of insulated wire cores using, for example, a known interposed tape focusing jig. In the present embodiment, a plurality of the tape-like inclusions 5 are overlapped and filled. Then, the press-wound tape 6 and the sheath 7 are sequentially formed around the periphery by a known method, so that the cable 1 filled with the tape-like inclusions 5 having ridges is formed. Here, after the inclusion is filled in the twisting step of the insulated wire core, in the step of rounding the entire subsequent cable, the entire cable 1 is squeezed so that the external force applied to rounding The inclusions 5 are appropriately bent inside the cable 1 so that the inclusions 5 fill the gaps between the plurality of insulated wire cores.

Table 1 shows a comparison of the mass used per unit length between the cable using the inclusion according to the embodiment of the first invention configured as described above and the cable using the conventional inclusion. Has been. Here, as the conventional inclusions, a resin composition is stretched into a sheet shape, and then slit and folded to form a string.

  Table 1 shows the inclusion use mass ratio of inclusions according to the embodiment of the first invention when the inclusion use mass per unit length of the cable using conventional inclusions is 100. ing. According to Table 1, the cable according to the embodiment of the first invention is lighter than a cable using a conventional inclusion. The reason why the weight of the cable is reduced in this way is because the inclusions provided with wrinkles are used. That is, the inclusions to which wrinkles are imparted increase the bulkiness of the inclusions because many gaps are formed inside the inclusions by the wrinkles, and the increased inclusions become lighter.

  The cable using the inclusions according to the embodiment of the first invention uses the inclusions provided with wrinkles, so that the weight can be reduced and the cost can be reduced. In addition, the cable using the inclusion according to this example, when a recyclable material such as recycled PET is used for the plastic resin of the inclusion, since these materials are excellent in recyclability, the environment is reduced. It becomes a more preferable cable in consideration.

  Furthermore, the cable using the inclusion according to this embodiment can be easily recycled because the filler such as an inorganic filler or a wood chip which becomes a neck when the inclusion is recycled is not blended. it can.

  In the cable according to the embodiment of the first invention, the cable using the inclusion having two insulated wire cores in which the conductor is covered with the insulator has been described. However, the present invention is not limited to this. Even if there are three or more insulated wire cores, the same effect as the cable according to the embodiment of the first invention can be obtained.

  Next, another embodiment of the cable inclusion used in the cable 1 according to the embodiment of the first invention will be described.

  A cable inclusion according to another embodiment of the first invention is configured such that a filler is blended with the plastic resin used for the cable inclusion 5 according to the embodiment. As the filler, tree components such as lignin, cellulose and hemicellulose, wood such as wood chips, and inorganic materials such as calcium carbonate and magnesium carbonate are used. Since these fillers have a density lower than that of the plastic resin, when the filler is added to the plastic resin of the inclusion 5, the effect that the inclusion 5 is further lightened can be obtained. Especially, the filler which consists of a tree component is a more preferable filler because it is not only effective in reducing the weight of the inclusion 5 but also excellent in recyclability.

  Here, tree components such as lignin, cellulose, and hemicellulose will be described in detail. Lignin is an amorphous polymer substance that exists as a vascular cell wall component of a tree or woody plant, and its molecular structure is a complex condensation of phenylpropane-based structural units. Cellulose is also referred to as fibrin, and is the main component constituting the woody and epidermal cells of the plant body. Moreover, hemicellulose is a polysaccharide which is present in a plant body along with cellulose, and is abundant in wood pulp. Thus, the density of the tree component is small because it is woody or plant. Therefore, the inclusion 5 having a configuration in which a tree component filler is blended with the plastic resin can be further reduced in weight. Among these tree components, lignin is produced as a by-product in the paper manufacturing industry, and most of it is disposed of, so it can be purchased inexpensively. Therefore, when lignin is used as the plastic resin filler, not only the inclusion 5 is lightened, but also the cost can be reduced, which is more effective for environmental considerations, especially for depletion of wood resources. is there.

  As described above, the cable using the inclusion according to another embodiment of the first invention is further reduced in weight and cost since the filler having a low density is mixed with the plastic resin of the inclusion. Can be further reduced.

  Next, an embodiment of a cable using the cable inclusion according to the second invention different from the cable inclusion according to the embodiment of the first invention will be described with reference to FIGS.

  FIG. 4 shows a perspective view of a cable using the cable inclusion according to the embodiment of the second invention, and FIG. 5 shows a cross-sectional view of the cable. 6 is a diagram conceptually showing the yarn used for the cable inclusion according to this embodiment, and FIG. 7 is a sectional view of the yarn shown in FIG. 6 in the XX direction. .

  4 and 5, reference numeral 11 denotes a cable according to an embodiment of the second invention. Since the configuration of the cable 11 is the same as that of the cable 1 shown in FIG. 1 except for the inclusion 5, the same reference numerals are used for the same configuration, and the description of the configuration is omitted.

  Inclusions 15 of the cable 11 are added to fill gaps between the insulated wire cores 4 generated when two or more insulated wire cores 4 are twisted together, and the cross section of the cable is made to be substantially circular. Is. The inclusion 15 is made of a base material such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or polyvinyl chloride (PVC), or recycled and recycled polyethylene terephthalate (regenerated PET). The plastic resin is used, and the plastic resin is not mixed with a filler such as an inorganic filler or a wood chip. In the case where recyclable materials such as recycled PET are used as the plastic resin, the environment can be further considered because these materials are excellent in recyclability. Further, the plastic resin can be easily recycled because the filler 5 such as an inorganic filler or a wood chip which becomes a neck in recycling is not blended in the inclusion 5.

  Further, the inclusion 15 is obtained by kneading the plastic resin of the base material with an extruder and extruding it into a fiber shape, and forming the obtained fiber into a string from a thread obtained by a known spinning method. Is formed.

  FIG. 6 shows this thread 50. FIG. 7 shows a cross-sectional view of the yarn 50 shown in FIG. 6 in the XX direction. The yarn 50 shown in FIG. 7 is made by twisting four fibers 52, and a gap 60 is formed between the fibers 52. The inclusion 15 that uses the thread 50 in which the gap is formed in the form of a string becomes lighter under the same volume as the inclusion 15 that uses a conventional tape in the form of a string. That is, when the yarn 50 having a gap formed in the inclusion 15 is used, the amount of the inclusion 15 in the gap is used, so that the inclusion 15 becomes lighter. In the embodiment of the present invention, the inclusion using the yarn 50 in which the four fibers 52 are twisted has been described. However, the present invention is not limited to this, and the twisting is performed with two or more fibers 52. If the yarn is made, the same effect as that of the embodiment of the second invention can be obtained.

  A comparison between the cable using the inclusions according to the embodiment of the second invention configured as described above and the mass using the inclusions per unit length (per unit volume) of the cable using the conventional inclusions is provided. It is shown in Table 2.

Here, as the conventional inclusions, a resin composition is stretched into a sheet shape, and then slit and folded to form a string.

  Table 2 shows the inclusion use mass ratio of inclusions according to the example of the second invention when the inclusion use mass per unit length of the cable using conventional inclusions is 100. ing. According to Table 2, the cable using the inclusion according to the embodiment of the second invention is lighter than the cable using the conventional inclusion. The reason why the cable using the inclusions according to this embodiment can be reduced in weight is to use a thread formed by twisting fibers in the inclusions in a string shape. Yarn made by twisting this fiber has a gap between the fibers inside the yarn, so the volume of inclusions in the gap can be reduced and the inclusions can be lightened. .

  As described above, the cable using the inclusion according to the embodiment of the second invention is used in the form of a string formed by twisting a fiber into the inclusion, and thus the weight is reduced and the cost is reduced. Can be achieved. In addition, the cable using the inclusion according to the embodiment of the second invention, when a recyclable material such as recycled PET is used for the plastic resin of the inclusion, these materials are excellent in recyclability. It is preferable in consideration of the environment. Furthermore, the cable using the inclusions according to this embodiment can be easily recycled because it does not contain fillers such as inorganic fillers and wood chips that become a neck when recycling inclusions. Can do.

  In the cable according to the embodiment of the second invention, the cable using the inclusion having the two insulated wire cores in which the conductor is covered with the insulator has been described, but the present invention is not limited to this. Even if there are three or more insulated wire cores, the same effect as the cable according to the embodiment of the second invention can be obtained.

  Next, another embodiment of the inclusion used in the cable 11 according to the embodiment of the second invention will be described.

  A cable inclusion according to another embodiment of the second invention is configured such that a filler is blended with the plastic resin used for the cable inclusion 15 according to the embodiment. As the filler, tree components such as lignin, cellulose and hemicellulose, wood such as wood chips, and inorganic materials such as calcium carbonate and magnesium carbonate are used. Since these fillers have a density lower than that of the plastic resin, when the filler is added to the plastic resin of the inclusion 15, the effect that the inclusion 15 is further lightened can be obtained. Among these, a filler made of a tree component is a more preferable filler because it is effective in reducing the weight of the inclusions 15 and is excellent in recyclability.

  Here, tree components such as lignin, cellulose, and hemicellulose will be described in detail. Lignin is an amorphous polymer substance that exists as a vascular cell wall component of a tree or woody plant, and its molecular structure is a complex condensation of phenylpropane-based structural units. Cellulose is also referred to as fibrin, and is the main component constituting the woody and epidermal cells of the plant body. Moreover, hemicellulose is a polysaccharide which is present in a plant body along with cellulose, and is abundant in wood pulp. Thus, the density of the tree component is small because it is woody or plant. Therefore, the inclusion 15 having a configuration in which a filler of a tree component is blended with the plastic resin can be further reduced in weight. Among these tree components, lignin is produced as a by-product in the paper manufacturing industry, and most of it is disposed of, so it can be purchased inexpensively. Therefore, when lignin is used as the plastic resin filler, not only the inclusions 15 become lighter, but also the cost can be reduced, which is more effective for environmental considerations, especially for depletion of wood resources. is there.

  As described above, the cable using the inclusion according to another embodiment of the second invention is further reduced in weight and cost since the filler having a low density is mixed with the plastic resin of the inclusion. Can be further reduced.

  Next, an embodiment of the cable using the cable inclusion according to the third invention different from the cable inclusion according to the embodiment of the second invention will be described with reference to FIG.

  FIG. 8 shows a cross-sectional view of a cable using the cable inclusion according to the embodiment of the third invention.

  In FIG. 8, reference numeral 21 denotes a cable using the cable inclusion according to the embodiment of the third invention. Since the configuration of the cable 21 is the same as that of the cable 1 shown in FIG. 1 except for the inclusions 5, the same reference numerals are used for the same configurations, and the description of the configurations is omitted.

  The inclusion 25 of the cable 21 is configured by blending a tree component filler with a plastic resin as a base material. Base plastic resins include general-purpose thermoplastic resins such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polyvinyl chloride (PVC), and recycled and recycled polyethylene terephthalate (recycled PET). The plastic resin is used. Among these, materials using a recyclable material such as recycled PET as the plastic resin as the base material of the inclusion 25 are preferable in consideration of the environment because they are excellent in recyclability.

  Moreover, tree components, such as lignin, a cellulose, and a hemicellulose, are used for a filler. Lignin is an amorphous polymer substance that exists as a vascular cell wall component of a tree or woody plant, and its molecular structure is a complex condensation of phenylpropane-based structural units. Cellulose is also referred to as fibrin, and is the main component constituting the woody and epidermal cells of the plant body. Moreover, hemicellulose is a polysaccharide which is present in a plant body along with cellulose, and is abundant in wood pulp. As described above, since the density of the tree component is small, if it is blended as a filler in the plastic resin of the inclusion 25, is it equivalent to the conventionally used inorganic filler in reducing the weight of the inclusion 25? More effects can be obtained. Among them, lignin is produced as a by-product in the paper manufacturing industry and the like, most of which is disposed of and can be purchased at low cost. For this reason, when the lignin is recycled and used for the inclusion 25, not only the inclusion 25 becomes light, but also the cost can be reduced, and it is more effective for environmental considerations, particularly for depletion of wood resources. .

  And the filler which consists of this tree component is mix | blended with a base material 1-200 weight part with respect to 100 weight part of plastic resins which are the base material of the inclusion 25. FIG.

  Here, the reason why the amount of the filler is 1 to 200 parts by weight with respect to 100 parts by weight of the plastic resin is that if the amount is less than 1 part by weight, the inclusion 25 is not sufficiently lightened, and 200 parts by weight. This is because the extrudability of the inclusions 25 deteriorates if the amount exceeds.

Table 3 specifically shows this as an example.

  Table 3 shows the compositions of inclusions shown in the first to fourth examples and comparative examples 1 to 2 and the evaluation results of the inclusions.

  The inclusions of the first to fourth examples and the comparative examples 1 to 2 shown in Table 3 are composed of the compositions shown below.

[First embodiment]
In the inclusion of the first embodiment, polyethylene (manufactured by Nippon Polyethylene Co., Ltd., trade name: Novatec LD LF440) is used as the plastic resin of the inclusion base material. Product) is composed of a composition containing 1%.

[Second Embodiment]
In the inclusion of the second example, polyethylene (manufactured by Nippon Polyethylene Co., Ltd., trade name: Novatec LD LF440) is used as the plastic resin of the base material of the inclusion. Product) is composed of a composition containing 200%.

[Third embodiment]
In the inclusion of the third embodiment, recycled PET (manufactured by Nippon Polyethylene Co., Ltd., trade name: Novatec LD LF440) is used as the plastic resin of the inclusion base material, and lignin (100 parts by weight of recycled PET) (Recycled product) is composed of a composition containing 50%.

[Fourth embodiment]
The inclusion of the fourth embodiment is a one-to-one blend of polyethylene (manufactured by Nippon Polyethylene Co., Ltd., trade name: Novatec LD LF440) and recycled PET (recycled product) in the plastic resin of the inclusion base material. And 50% lignin (recycled product) is blended with 100 parts by weight of the plastic resin of the base material.

[Comparative Example 1]
In the inclusion of Comparative Example 1, polyethylene (manufactured by Nippon Polyethylene Co., Ltd., trade name: Novatec LD LF440) is used as the plastic resin of the base material of the inclusion, and lignin (recycled product) with respect to 100 parts by weight of this polyethylene. Is composed of a composition containing 250%.

[Comparative Example 2]
The inclusions in Comparative Example 2 are composed of a composition consisting only of polyethylene (made by Nippon Polyethylene Co., Ltd., trade name: Novatec LD LF440), which is a plastic resin as a base material for inclusions.

  The inclusions of the first to fourth examples and the comparative examples 1 to 2 having such a composition are kneaded and extruded by an extruder, for example, and formed into a film by inflation. , Molded as inclusions. The molded inclusions were evaluated from the viewpoints of environmental considerations, light weight, and extrusion moldability. Table 3 shows the evaluation results. Here, the viewpoint of environmental consideration is based on whether or not the recyclability of resources is excellent, and a higher evaluation can be obtained by using more recycled materials. Moreover, the viewpoint of lightness is evaluated based on whether or not the weight of inclusions can be reduced, and the higher the amount of lignin that contributes to weight reduction, the higher evaluation can be obtained. Furthermore, the viewpoint of extrudability is evaluated by whether or not extrusion molding can be easily performed, and a higher evaluation can be obtained as the amount of lignin is smaller.

  According to the evaluation results shown in Table 3, the evaluation was “◎” from the viewpoint of environmental considerations in the second example, the third example, the fourth example 4, and the comparison. Example 1. This is because, in the second example, lignin is mixed in a large amount of 200 parts by weight, and in comparative example 1, lignin is mixed in a large amount of 250 parts by weight, so that a large amount of lignin can be recycled into inclusions. It is because it is excellent in recyclability. In the third embodiment, since 50 parts by weight of lignin and 100 parts by weight of recycled PET are blended, it is possible to recycle lignin in inclusions and use recycled PET that has been recycled. It is because it is excellent in recyclability. Further, in the fourth embodiment, since 50 parts by weight of lignin and 50 parts by weight of recycled PET are blended, it is possible to recycle lignin in inclusions and use recycled PET that has been recycled. It is because it is excellent in recyclability. The evaluation was “◯” in the first example. Because 1 part by weight of lignin is blended in the first embodiment, the environment is considered because lignin can be recycled and used in inclusions. The evaluation is “x” in Comparative Example 2. This is because in Comparative Example 2, neither lignin nor recycled PET is blended, so that the environment cannot be considered.

  In addition, in the light weight viewpoint, the evaluation was “軽 量” in the second example and the comparative example 1. This is because, in the second example, lignin is 200 parts by weight, and in Comparative Example 1 lignin is 250 parts by weight and a large amount of lignin having a low density is blended, so that the inclusions are lightened. It is. The evaluation was “◯” in the first example, the third example, and the fourth example. This is because inclusions can be lightened because lignin having a low density is blended in the first, third, and fourth embodiments. The evaluation is “x” in Comparative Example 2. This is because Comparative Example 2 does not contain lignin having a low density, and thus the inclusions cannot be reduced in weight.

  Furthermore, it was the first example and the comparative example 2 that were evaluated as “◎” from the viewpoint of extrusion moldability. This is because the lignin of the filler blended in the plastic resin of the base material is 1 part by weight in the first example and not in the comparative example 2, so that the extrudability of the resin is not impaired. This is because the moldability is excellent. The evaluation was “◯” in the second example, the third example, and the fourth example. This is because even if lignin is blended in the second embodiment, the third embodiment, and the fourth embodiment, the resin can be extruded. The evaluation is “X” in Comparative Example 1. This is because it is difficult to extrude the resin because Comparative Example 1 contains lignin in a larger amount of 250 parts by weight.

  As described above, the cable using the inclusion according to the embodiment of the third invention is blended with a filler made of a tree component such as lignin in the plastic resin of the inclusion. In addition, it is possible to reduce the manufacturing cost of the inclusions and the cables using the inclusions in order to use inexpensive materials.

  In addition, the inclusion according to the embodiment of the third invention is, for example, the form of the inclusion according to the embodiment of the first invention or the form of the inclusion according to the embodiment of the second invention. There is no limitation to this, and a conventional resin composition may be stretched to form a sheet, and then slit and folded to form a string.

Sectional drawing of the cable which concerns on the Example of 1st invention. It is the elements on larger scale of FIG. The conceptual diagram of the tape used for the inclusion of the cable shown by FIG. The perspective view of the cable which concerns on the Example of 2nd invention. Sectional drawing of the cable which concerns on the Example of 2nd invention. The conceptual diagram of the thread | yarn used for the inclusion of the cable shown by FIG. Sectional drawing of the XX direction of the thread | yarn used for the inclusion of the cable shown by FIG. Sectional drawing of the cable which concerns on the Example of 3rd invention.

Explanation of symbols

1,11,21 ......... Cable 2 ... ……………… Conductor 3 ……………………… Insulator 4 ………………………… Insulated wire core 5,15,25 ……… Inclusion 6 ……………………… Presser Wound Tape 7 ……………………… Sheath

Claims (7)

A cable inclusion formed by twisting a plurality of insulated wire cores and interposing a gap between the respective wire cores, using a plastic resin as a base material of the inclusions and providing a ridge on the base material Inclusions. For cable inclusions, in which a plurality of insulated wire cores are twisted and interposed in the gaps between the respective wire cores, a plastic resin is used as the base material of the inclusions, and the base material is spun and formed. Inclusions. The cable according to claim 1 or 2, wherein the plastic resin is composed of one or more of polyethylene (PE), polyethylene terephthalate (PET), and recycled polyethylene terephthalate (regenerated PET). Inclusions. The cable inclusion according to claim 1, wherein the plastic resin is formed by blending a filler. The said inclusion is the inclusion for cables of Claim 4 comprised by any 1 type, or 2 or more types in lignin, a cellulose, and a hemicellulose. In a cable inclusion interposed between a plurality of insulated wire cores by twisting a plurality of insulated wire cores, 1 to 200 parts by weight of a wood component filler is blended with 100 parts by weight of plastic resin in the base material of the inclusions. Cable inclusions characterized by comprising. The cable inclusions according to claim 6, wherein the filler is composed of one or more of lignin, cellulose, and hemicellulose.

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