JP6503311B2 - Method of manufacturing multilayer sheath cable - Google Patents
Method of manufacturing multilayer sheath cable Download PDFInfo
- Publication number
- JP6503311B2 JP6503311B2 JP2016043570A JP2016043570A JP6503311B2 JP 6503311 B2 JP6503311 B2 JP 6503311B2 JP 2016043570 A JP2016043570 A JP 2016043570A JP 2016043570 A JP2016043570 A JP 2016043570A JP 6503311 B2 JP6503311 B2 JP 6503311B2
- Authority
- JP
- Japan
- Prior art keywords
- sheath
- mass
- foamed
- cable
- multilayer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 239000000463 material Substances 0.000 claims description 36
- 239000006260 foam Substances 0.000 claims description 34
- 239000004800 polyvinyl chloride Substances 0.000 claims description 30
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 29
- 239000004020 conductor Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 27
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 24
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 12
- 239000004014 plasticizer Substances 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 19
- 230000002087 whitening effect Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 239000002666 chemical blowing agent Substances 0.000 description 8
- 239000000654 additive Substances 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- -1 phthalic acid ester Chemical class 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000004156 Azodicarbonamide Substances 0.000 description 3
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 3
- 235000019399 azodicarbonamide Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N o-dicarboxybenzene Natural products OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004803 Di-2ethylhexylphthalate Substances 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- ARCGXLSVLAOJQL-UHFFFAOYSA-N anhydrous trimellitic acid Natural products OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000004718 silane crosslinked polyethylene Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Images
Landscapes
- Laminated Bodies (AREA)
- Insulated Conductors (AREA)
- Manufacturing Of Electric Cables (AREA)
Description
本発明は、多層シースが発泡シースを含む複数層構造からなり、絶縁導体に当該多層シースを被覆してなる多層シースケーブルの製造方法に関するものである。 The present invention is made multi-layered sheath from multi-layer structure that includes a foamed sheath, to a method for manufacturing a multilayer Shisukebu Le made by coating the multilayer sheath insulated conductor.
従来から、ケーブルの柔軟性の向上、ケーブルの軽量化、シースの剥離性の向上等を目的として、シースとして例えばポリ塩化ビニル等の発泡体が用いられている。このような発泡シースケーブルの例として、特許文献１には、発泡させたポリ塩化ビニル等からなる発泡シースを導体に被覆してなる発泡シースケーブルが開示されている。 Conventionally, for the purpose of improving the flexibility of the cable, reducing the weight of the cable, improving the releasability of the sheath, etc., a foam such as polyvinyl chloride is used as the sheath. As an example of such a foamed sheath cable, Patent Document 1 discloses a foamed sheath cable formed by covering a conductor with a foamed sheath made of foamed polyvinyl chloride or the like.
図４（ａ）にこの発泡シースケーブルの一例を断面図で示す。図示されるように、この発泡シースケーブルは、２本の導体１を並列してその周囲を発泡シース２で一括被覆して構成されている。また、図４（ｂ）は（ａ）において点線で囲まれた（イ）部を拡大して模式的に示した図である。この発泡シースケーブルでは、発泡シース２の発泡セルにより、シースの軽量化が図れ、ケーブルシースの剥離性が向上することが知られている。また、この発泡シースケーブルでは、擦れ等により容易に発泡セルが露出し、傷がつきやすくなるため、その対策として、発泡シース２が、表皮部２ａの発泡率を深層部２ｂより小さくする構成を有している。 An example of this foamed sheath cable is shown in a cross-sectional view in FIG. 4 (a). As illustrated, this foamed sheath cable is configured such that two conductors 1 are juxtaposed and the periphery thereof is collectively covered with the foamed sheath 2. Moreover, FIG.4 (b) is the figure which expanded the (a) part enclosed with the dotted line in (a), and was shown typically. In this foamed sheath cable, it is known that the foamed cells of the foamed sheath 2 can reduce the weight of the sheath and improve the peelability of the cable sheath. Moreover, in this foamed sheath cable, the foamed cells are easily exposed and easily scratched by rubbing or the like, and as a countermeasure therefor, the foamed sheath 2 has a configuration in which the foaming ratio of the skin portion 2a is smaller than that of the deep layer portion 2b. Have.
しかし、従来の発泡シースケーブルによれば、発泡シースがセル構造体を有しているので、可塑剤等を含有するポリ塩化ビニル混和物（ＰＶＣ混和物）自体の有酸素熱曝露面積が増加することになって、可塑剤の酸化による劣化やポリ塩化ビニルの塩化水素捕捉効率が低下すると考えられる。これによって耐熱性が低下する。また、発泡シースはセル構造体を有するので、変形量が大きくなる。また、寒冷環境下では、セル構造体を起点にして脆性破壊が生じるので、耐寒性が低下する。更に、ケーブル同士の擦れによる白化を完全に抑えることができないので、後述する３本のケーブルを撚り合わせて構成したトリプレックスケーブルに適用することが困難であった。 However, according to the conventional foamed sheath cable, since the foamed sheath has a cell structure, the aerobic heat exposure area of the polyvinyl chloride compound (PVC compound) itself containing a plasticizer and the like is increased. In particular, it is considered that the deterioration due to the oxidation of the plasticizer and the hydrogen chloride capture efficiency of polyvinyl chloride decrease. This reduces the heat resistance. In addition, since the foam sheath has a cell structure, the amount of deformation is large. Further, in a cold environment, since the brittle fracture occurs from the cell structure, cold resistance is lowered. Furthermore, since whitening due to rubbing between the cables can not be completely suppressed, it has been difficult to apply to a triplex cable configured by twisting three cables described later.
従って、本発明の目的は、軽量化及び柔軟性を維持しつつ、耐熱性、耐寒性及び擦れ白化性の改善を実現する多層シースケーブルの製造方法を提供することにある。 Accordingly, an object of the present invention is to provide while maintaining the light weight and flexibility, heat resistance, a method for manufacturing a multilayer Shisukebu le to provide improved cold resistance and rub whitening resistance.
本発明は、上記した目的を実現するため、以下に述べる［１］〜［４］の多層シースケーブルの製造方法を提供する。 The present invention provides a method for manufacturing a multilayer sheath cable of [1] to [ 4 ] described below, in order to achieve the above-mentioned object.
［１］導体に絶縁体を被覆した絶縁導体の外側に複数層からなるシース構造体が設けられている多層シースケーブルの製造方法であって、前記シース構造体が、最外層シースとしての非発泡構造の外層シースと、前記外層シースの内側に設けられた、セル構造体を有する発泡シースとを含み、前記発泡シースの前記セル構造体の形成のために用いる化学発泡剤の平均粒径が０．５μｍ以上１０μｍ以下であり、その化学発泡剤が０．５質量％以上８質量％以下含有されたマスターバッチをポリ塩化ビニル混和物１００質量部に対して０．２質量部以上５質量部以下で添加した発泡シース材料を押出して前記発泡シースを形成する多層シースケーブルの製造方法。
［２］導体に絶縁体を被覆した絶縁導体の外側に複数層からなるシース構造体が設けられている多層シースケーブルの製造方法であって、前記シース構造体が、最外層シースとしての非発泡構造の外層シースと、前記外層シースの内側に設けられた、セル構造体を有する発泡シースと、前記発泡シースの内側に設けられた非発泡構造の内層シースとを含み、前記外層シース、前記発泡シース及び前記内層シースの材料として、可塑剤含有量が１５質量％以上３０質量％以下であり、炭酸カルシウム含有量が５質量％以上３０質量％以下であるポリ塩化ビニル混和物を用いる多層シースケーブルの製造方法。
［３］前記発泡シースの前記セル構造体のセル径が５００μｍ以下である前記［１］又は［２］に記載の多層シースケーブルの製造方法。
［４］前記発泡シースの前記セル構造体による質量減少率が１５％以上３５％以下である前記［１］〜［３］に記載の多層シースケーブルの製造方法。
[1] A manufacturing method of a multilayer sheath cable in which a sheath structure composed of a plurality of layers is provided on the outside of an insulated conductor coated with an insulator on a conductor, wherein the sheath structure is non-foamed as an outermost sheath An outer layer sheath of a structure, and a foam sheath having a cell structure provided inside the outer layer sheath, wherein the average particle size of the chemical foaming agent used for forming the cell structure of the foam sheath is 0 0.2 parts by mass to 5 parts by mass with respect to 100 parts by mass of the polyvinyl chloride mixture, which is a masterbatch containing 0.5 to 10 μm and containing 0.5 to 8% by mass of the chemical foaming agent A method of manufacturing a multilayer sheath cable, wherein the foamed sheath material added in is extruded to form the foamed sheath.
[2] A manufacturing method of a multilayer sheath cable in which a sheath structure comprising a plurality of layers is provided on the outside of an insulated conductor coated with an insulator on a conductor, wherein the sheath structure is non-foamed as an outermost sheath An outer layer sheath having a structure, a foam sheath having a cell structure provided inside the outer layer sheath, and an inner layer sheath having a non-foam structure provided inside the foam sheath , the outer layer sheath, the foam Multilayer sheath cable using polyvinyl chloride compound having a plasticizer content of 15% by mass to 30% by mass and a calcium carbonate content of 5% by mass to 30% by mass as materials of the sheath and the inner layer sheath Manufacturing method.
[3] The method for producing a multilayer sheath cable according to the above [1] or [2], wherein the cell diameter of the cell structure of the foamed sheath is 500 μm or less.
[4] The method for producing a multilayer sheath cable according to the above [1] to [3], wherein a mass reduction rate by the cell structure of the foamed sheath is 15% or more and 35% or less.
本発明によれば、多層シース構造体が、発泡シースを含んでいるので、軽量化及び柔軟性を有し、また、発泡シースよりも外側に外層シースがあるので、擦れによる白化を抑えることができ、また、前述した耐熱性は、外層シースが設けられているので、その低下が抑制され、耐熱試験後に良好な強度残率と伸び残率が得られる。更に、耐寒性は、所定の構造の多層シース構造体を設けたので、その低下が抑制される。 According to the present invention, since the multilayer sheath structure includes the foamed sheath, it has weight reduction and flexibility, and since the outer sheath is outside the foamed sheath, the whitening due to rubbing is suppressed. Further, since the heat resistance described above is provided with the outer layer sheath, the reduction thereof is suppressed, and a good strength residual rate and an elongation residual rate can be obtained after the heat resistance test. Furthermore, since the cold resistance is provided with a multilayer sheath structure having a predetermined structure, the reduction thereof is suppressed.
［実施の形態］
以下、図１〜３を参照しながら本発明の実施の形態を説明する。図１は本発明の第１の実施の形態に係る３層のシース構造体を有する多層シースケーブルの断面を示す図であり、図２は本発明の第２の実施の形態に係る２層のシース構造体を有する多層シースケーブルの断面を示す図であり、図３は本発明の多層シースケーブルを適用したトリプレックスケーブルの断面を示す図である。
Embodiment
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a view showing a cross section of a multilayer sheath cable having a three-layer sheath structure according to a first embodiment of the present invention, and FIG. 2 is a two-layer cable according to a second embodiment of the present invention FIG. 3 is a cross-sectional view of a multilayer sheath cable having a sheath structure, and FIG. 3 is a cross-sectional view of a triplex cable to which the multilayer sheath cable of the present invention is applied.
〔多層シースケーブル〕
図１に示す第１の実施の形態において、３層からなるシース構造体３０を有する多層シースケーブルは、絶縁導体２０と、この絶縁導体２０の外周に被覆される、非発泡構造の外層シース３１、外層シース３１の内側に設けられる発泡シース３２、及び発泡シース３２の内側に設けられる非発泡構造の内層シース３３を備えたシース構造体３０とから構成されている。
一方、図２に示す第２の実施の形態において、２層からなるシース構造体３０を有する多層シースケーブルは、絶縁導体２０と、この絶縁導体２０の外周に被覆される、外層シース３１及び発泡シース３２を備えたシース構造体３０とから構成されている。
なお、本発明の効果を奏する限り、外側シース３１と発泡シース３２の間や、発泡シース３２と内層シース３３の間に他の層を形成することもできる。
[Multilayer sheath cable]
In the first embodiment shown in FIG. 1, a multilayer sheath cable having a sheath structure 30 consisting of three layers comprises an insulated conductor 20 and an outer sheath 31 of non-foamed structure, which is covered on the outer periphery of the insulated conductor 20. The sheath structure 30 is provided with a foam sheath 32 provided inside the outer layer sheath 31 and a non-foam structure inner layer sheath 33 provided inside the foam sheath 32.
On the other hand, in the second embodiment shown in FIG. 2, the multilayer sheath cable having the sheath structure 30 composed of two layers comprises the insulated conductor 20 and the outer sheath 31 and the foam coated on the outer periphery of the insulated conductor 20. And a sheath structure 30 provided with a sheath 32.
Other layers may be formed between the outer sheath 31 and the foam sheath 32 or between the foam sheath 32 and the inner layer sheath 33 as long as the effects of the present invention are exhibited.
（シース構造体３０）
図１及び２の電気絶縁性のシース構造体３０は、外層シース３１と発泡シース３２を備える点で共通する。図１に示すようにシース構造体３０が更に内層シース３３を備えていることが耐熱性及び耐寒性の効果がより優れる点で好ましいが、軽量化及び柔軟性の点では図２に示す実施形態が好ましい。
(Sheath structure 30)
The electrically insulating sheath structure 30 of FIGS. 1 and 2 is common in that the outer layer sheath 31 and the foam sheath 32 are provided. It is preferable that the sheath structure 30 further includes the inner layer sheath 33 as shown in FIG. 1 in that the effects of heat resistance and cold resistance are more excellent, but the embodiment shown in FIG. Is preferred.
＜外層シース３１＞
外層シース３１は、非発泡構造、すなわち、充実構造を有する。外層シース３１の材料としては、ベース樹脂としてポリ塩化ビニル（ＰＶＣ）を用いることが好ましいが、シース材料として使用できる樹脂であれば特に限定されることなく使用できる。外層シース材料の配合例（添加剤を含む）については、製造方法の説明において後述する。外層シース３１の層厚は、例えば０．０５ｍｍ以上０．５μｍ以下であることが好ましい。
<Outer layer sheath 31>
The outer sheath 31 has a non-foamed structure, that is, a solid structure. As a material of the outer layer sheath 31, although polyvinyl chloride (PVC) is preferably used as a base resin, any resin that can be used as a sheath material can be used without particular limitation. Examples of the formulation of the outer layer sheath material (including additives) will be described later in the description of the production method. The layer thickness of the outer sheath 31 is preferably, for example, 0.05 mm or more and 0.5 μm or less.
＜発泡シース３２＞
発泡シース３２は、発泡により形成された多数のセル（空孔）を構造中に含むセル構造体を有する。セル構造体のセル径は、５００μｍ以下であることが好ましく、４５０μｍ以下であることがより好ましい。セル構造体のセル径の下限は特に限定しないが、現状６０μｍ以上である。
<Foamed sheath 32>
The foam sheath 32 has a cell structure including in its structure a large number of cells (voids) formed by foam. The cell diameter of the cell structure is preferably 500 μm or less, more preferably 450 μm or less. The lower limit of the cell diameter of the cell structure is not particularly limited, but is currently 60 μm or more.
また、発泡シース３２は、化学発泡剤が分散されたマスターバッチを添加したシース材料を押出成形することで形成されるが、化学発泡剤が分散されたマスターバッチを添加せずにシース材料が非発泡の構造で押出された際の質量を１００％とした場合の、セル構造体（空孔）の形成による質量減少率が１５％以上３５％以下になっていることが好ましい。 In addition, although the foam sheath 32 is formed by extruding a sheath material to which a masterbatch in which a chemical foaming agent is dispersed is added, the sheath material is not added without adding a masterbatch in which a chemical foaming agent is dispersed. It is preferable that the mass reduction rate by formation of a cell structure (pores) is 15% or more and 35% or less when the mass at the time of extrusion in the foam structure is 100%.
上記マスターバッチ以外の発泡シース３２の材料は、外層シース３１の材料と同様である。外層シース３１の材料と同一材料とすることが望ましい。発泡シース３２の材料に添加するマスターバッチとしては、セル構造体のセル径を５００μｍ以下とし、質量減少率を１５％以上３５％以下にコントロールするため、化学発泡剤の平均粒径が０．５μｍ以上１０μｍ以下からなり、その化学発泡剤が０．５質量％以上８質量％以下含有されたマスターバッチを適用している。マスターバッチの添加量は、ベース樹脂と添加剤を含む樹脂組成物（例えばＰＶＣ混和物）１００質量部に対して０．２質量部以上５質量部以下である。マスターバッチが押出工程で添加されてセル構造体が形成される。マスターバッチは、予めシース材料に添加混合しておいてもよい。発泡シース材料の配合例（添加剤を含む）については、製造方法の説明において後述する。発泡シース３２の層厚は、例えば０．５ｍｍ以上１．５ｍｍ以下であることが好ましい。 The material of the foam sheath 32 other than the master batch is the same as the material of the outer sheath 31. It is desirable to use the same material as the material of the outer sheath 31. As a masterbatch to be added to the material of the foam sheath 32, in order to control the cell diameter of the cell structure to 500 μm or less and control the mass reduction rate to 15% or more and 35% or less, the average particle size of the chemical blowing agent is 0.5 μm The masterbatch which consists of 10 micrometers or less and the chemical foaming agent contained 0.5 mass% or more and 8 mass% or less is applied. The addition amount of the master batch is 0.2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of a resin composition (for example, a PVC mixture) containing a base resin and an additive. The masterbatch is added in the extrusion step to form a cell structure. The masterbatch may be added to and mixed with the sheath material in advance. Examples of the composition of the foamed sheath material (including the additive) will be described later in the description of the production method. The layer thickness of the foam sheath 32 is preferably, for example, 0.5 mm or more and 1.5 mm or less.
＜内層シース３３＞
内層シース３３は、非発泡構造、すなわち、充実構造を有する。内層シース３３の材料は、外層シース３１の材料と同様である。外層シース３１の材料と同一材料とすることが望ましい。内層シース材料の配合例（添加剤を含む）については、製造方法の説明において後述する。内層シース３３の層厚は、例えば０．０５ｍｍ以上０．５μｍ以下であることが好ましい。
<Inner layer sheath 33>
The inner sheath 33 has a non-foamed structure, ie, a solid structure. The material of the inner layer sheath 33 is similar to the material of the outer layer sheath 31. It is desirable to use the same material as the material of the outer sheath 31. Examples of the inner layer sheath material (including additives) will be described later in the description of the production method. The layer thickness of the inner layer sheath 33 is preferably, for example, 0.05 mm or more and 0.5 μm or less.
（絶縁導体２０）
絶縁導体２０は、導体１０と絶縁体１５とを含んでいる。導体１０及び絶縁体１５の材料としては、ケーブルに使用できるものであればよく、特に限定されない。導体径や絶縁体厚さについても特に限定されない。
(Insulated conductor 20)
Insulated conductor 20 includes conductor 10 and insulator 15. The material of the conductor 10 and the insulator 15 is not particularly limited as long as it can be used for a cable. The diameter of the conductor and the thickness of the insulator are not particularly limited.
〔多層シースケーブルの製造方法〕
次に、本発明の多層シースケーブルの製造方法について説明する。
[Method of Manufacturing Multilayer Sheath Cable]
Next, a method of manufacturing the multilayer sheath cable of the present invention will be described.
本発明の多層シースケーブルを製造するにあたっては、導体１０に絶縁体１５（例えばシラン架橋ポリエチレン）を被覆した絶縁導体２０に、２層あるいは３層ヘッドを有する押出機を用いて各層のシース材料（例えばＰＶＣ混和物）を被覆し、シース構造体３０を形成する。発泡シース３２のシース材料には、押出成形時又は押出成形前に、樹脂組成物（例えばＰＶＣ混和物）に化学発泡剤が分散されたマスターバッチが添加される。 In producing the multilayer sheath cable of the present invention, the sheath material of each layer is formed using an extruder having a two-layer or three-layer head on the insulated conductor 20 in which the conductor 10 is coated with the insulator 15 (for example, silane cross-linked polyethylene) For example, the PVC mixture is coated to form a sheath structure 30. To the sheath material of the foam sheath 32, a master batch in which a chemical blowing agent is dispersed in a resin composition (for example, a PVC mixture) is added during or before extrusion.
本実施の形態において好適なシース材料であるＰＶＣ混和物について以下に説明する。また、マスターバッチに添加される化学発泡剤について以下に説明する。 The PVC blend which is a preferable sheath material in the present embodiment will be described below. Also, chemical blowing agents added to the masterbatch are described below.
本実施の形態におけるＰＶＣ混和物としては、ベース樹脂であるＰＶＣに可塑剤及び炭酸カルシウムが添加されたものが好ましい。なお、本発明の効果を奏する限り、シース材料に添加可能なその他の添加剤（例えば、安定剤、難燃剤、老化防止剤、紫外線吸収剤、着色剤、軟化剤、滑剤、加工助剤、架橋助剤）が添加されていてもよい。 As the PVC mixture in the present embodiment, one in which a plasticizer and calcium carbonate are added to PVC as a base resin is preferable. In addition, as long as the effects of the present invention are exhibited, other additives which can be added to the sheath material (for example, a stabilizer, a flame retardant, an antiaging agent, an ultraviolet absorber, a colorant, a softener, a lubricant, a processing aid, a crosslinking agent Auxiliaries may be added.
発泡シース３２のシース材料としては、化学発泡剤が分散されたマスターバッチをＰＶＣ混和物１００質量部に対して０．２質量部以上５質量部以下で添加した発泡シース材料が好適である。マスターバッチの添加量の下限は、ＰＶＣ混和物１００質量部に対して０．５質量部以上であることが好ましく、１質量部以上であることがより好ましい。マスターバッチの添加量の上限は、ＰＶＣ混和物１００質量部に対して４質量部以下であることが好ましく、３質量部以下であることがより好ましい。 As a sheath material of the foam sheath 32, a foam sheath material is preferable in which a masterbatch in which a chemical foaming agent is dispersed is added in an amount of 0.2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the PVC mixture. The lower limit of the addition amount of the master batch is preferably 0.5 parts by mass or more, and more preferably 1 part by mass or more with respect to 100 parts by mass of the PVC mixture. The upper limit of the addition amount of the master batch is preferably 4 parts by mass or less, and more preferably 3 parts by mass or less with respect to 100 parts by mass of the PVC mixture.
（ＰＶＣ）
ＰＶＣの重合度は、コスト、成形性の面から平均重合度が１３００付近のものが好ましい。押出時のフローを良化するため平均重合度が１０００のＰＶＣを用いても良い。
(PVC)
The polymerization degree of PVC is preferably one having an average polymerization degree of about 1300 from the viewpoint of cost and moldability. In order to improve the flow during extrusion, PVC having an average polymerization degree of 1000 may be used.
（可塑剤）
可塑剤は、例えばフタル酸エステル、トリメリット酸エステル、ポリエステルのうちから単独で選択しても良く、併用処方しても良い。また、耐熱性を追求する目的でエポキシ系可塑剤、耐寒性を追究する目的でジカルボン酸エステルを２次可塑剤として用いても良い。コスト、成形性からフタル酸エステルを用いることが好ましく、その中でも供給性の面からフタル酸ビス（２−エチルヘキシル）（ＤＥＨＰ）やフタル酸ジイソノニル（ＤＩＮＰ）がより好ましい。可塑剤は、ＰＶＣ混和物中に１５質量％以上３０質量％以下添加されていることが好ましく、１８質量％以上２８質量％以下添加されていることがより好ましい。
(Plasticizer)
The plasticizer may be selected alone from, for example, phthalic acid ester, trimellitic acid ester, and polyester, or may be co-formulated. Further, an epoxy plasticizer may be used for the purpose of pursuing heat resistance, and a dicarboxylic acid ester may be used as a secondary plasticizer for the purpose of pursuing cold resistance. It is preferable to use phthalic acid ester in view of cost and moldability, and among these, bis (2-ethylhexyl) phthalate (DEHP) and diisononyl phthalate (DINP) are more preferable in view of supplyability. The plasticizer is preferably added in an amount of 15% by mass to 30% by mass in the PVC mixture, and more preferably 18% by mass to 28% by mass.
（炭酸カルシウム）
通常、炭酸カルシウムはＰＶＣの充填剤として添加されるが、本発明の実施形態では、発泡シース３２のセル構造体形成時の発泡径制御のために用いられる。炭酸カルシウムの添加量は５質量％以上３０質量％以下が好ましく、１０質量％以上２５質量％以下がより好ましい。下限は１５質量％以上であることが更に好ましい。炭酸カルシウムの添加量が５質量％未満だとセル構造体の径を均一にコントロールすることが難しく、３１質量％以上だとセル構造体の形成を阻害することがある。炭酸カルシウムは、コストを考慮すると重質炭酸カルシウムを用いることが好ましく、レーザー回折式粒度分布計により測定した平均粒径は０．８μｍ以上３μｍ以下にコントロールされていることが好ましい。また、炭酸カルシウムには、ステアリン酸など脂肪酸による表面処理がなされていることが、ケーブルの擦れによる白化を抑制する観点から好ましい。
(Calcium carbonate)
In general, calcium carbonate is added as a filler for PVC, but in the embodiment of the present invention, calcium carbonate is used to control the diameter of the foamed sheath 32 when forming the cell structure. 5 mass% or more and 30 mass% or less are preferable, and, as for the addition amount of calcium carbonate, 10 mass% or more and 25 mass% or less are more preferable. The lower limit is more preferably 15% by mass or more. If the amount of calcium carbonate added is less than 5% by mass, it is difficult to uniformly control the diameter of the cell structure, and if 31% by mass or more, formation of the cell structure may be inhibited. In view of cost, it is preferable to use calcium carbonate as heavy calcium carbonate, and it is preferable that the average particle diameter measured by a laser diffraction type particle size distribution meter is controlled to 0.8 μm or more and 3 μm or less. Further, calcium carbonate is preferably subjected to surface treatment with fatty acid such as stearic acid from the viewpoint of suppressing whitening due to rubbing of the cable.
（化学発泡剤）
化学発泡剤としては、例えばアゾジカルボンアミド（ＡＤＣＡ）が好適である。レーザー回折式粒度分布計により測定した化学発泡剤の平均粒径は０．５μｍ以上１０μｍ以下からなることが好ましく、０．５μｍ以上５μｍ以下にコントロールされていることがより好ましい。平均粒径が０．５μｍ未満だと、材料自体のコストが高くなり、１１μｍ以上だとセル径が５００μｍ以下のセル構造体が得られないためである。マスターバッチ中の化学発泡剤の添加量は０．５質量％以上８質量％以下が好ましく、０．５質量％以上６質量％以下がより好ましい。
(Chemical blowing agent)
As a chemical blowing agent, azodicarbonamide (ADCA) is suitable, for example. The average particle size of the chemical blowing agent measured by a laser diffraction type particle size distribution analyzer is preferably 0.5 μm to 10 μm, and more preferably 0.5 μm to 5 μm. If the average particle size is less than 0.5 μm, the cost of the material itself is high, and if it is 11 μm or more, a cell structure having a cell diameter of 500 μm or less can not be obtained. 0.5 mass% or more and 8 mass% or less are preferable, and, as for the addition amount of the chemical blowing agent in a masterbatch, 0.5 mass% or more and 6 mass% or less are more preferable.
〔トリプレックスケーブル〕
図３に示すトリプレックスケーブルは、本発明の実施の形態に係る上記の多層シースケーブル３本を撚り合わせて構成したものである。本発明の実施の形態に係る多層シースケーブルは擦れ白化性に優れるため、トリプレックスケーブルとして使用しても擦れ白化が抑制される。なお、トリプレックスケーブルに限らず、２本又は４本以上のケーブルを撚り合せた多芯ケーブルにおいても同様の効果を有する。
[Triplex cable]
The triplex cable shown in FIG. 3 is formed by twisting three multilayer sheath cables according to the embodiment of the present invention. Since the multilayer sheath cable according to the embodiment of the present invention is excellent in rubbing whitening property, rubbing whitening is suppressed even when used as a triplex cable. In addition, not only a triplex cable but the multicore cable which twisted two or four or more cables together has the same effect.
以下、本発明の多層シースケーブルの実施例１〜１０、及び比較例１〜５を説明する。 Hereinafter, Examples 1 to 10 of the multilayer sheath cable of the present invention and Comparative Examples 1 to 5 will be described.
シース構造体３０の各層のシース材料として表１に記載の配合のＰＶＣ混和物を準備した。ＰＶＣ混和物は、表１記載の各種材料を計量した後、１００Ｌヘンシェルミキサーで混合し、ドライアップさせた材料をスクリュー径４０ｍｍの２軸混練押出機を用いてペレット状に成形した。混練押出機の成形温度は１５０℃以上１７０℃以下で行なった。 A PVC blend of the formulation described in Table 1 was prepared as a sheath material for each layer of the sheath structure 30. After measuring the various materials listed in Table 1, the PVC mixture was mixed with a 100 L Henschel mixer, and the dried material was formed into pellets using a twin screw extruder having a screw diameter of 40 mm. The molding temperature of the kneading extruder was 150 ° C. or more and 170 ° C. or less.
また、発泡シース３２のシース材料に添加するマスターバッチを表２の配合にしたがって準備した。マスターバッチは、ドライアップさせた上記ＰＶＣ混和物に表２に示す平均粒径の化学発泡剤（ＡＤＣＡ）を混合し、カッタミルで再粉砕した粉体を、スクリュー径４０ｍｍの２軸混練押出機を用いてペレット状に成形した。混練押出に関しては１１０℃以上１３０℃以下で低温混練を実施した。 Also, a masterbatch to be added to the sheath material of the foamed sheath 32 was prepared according to the formulation of Table 2. A masterbatch is prepared by mixing the chemical foaming agent (ADCA) of average particle size shown in Table 2 with the above-mentioned dried PVC mixture and regrinding the powder with a cutter mill, using a twin screw extruder having a screw diameter of 40 mm. It was molded into pellets. Low temperature kneading was performed at 110 ° C. or more and 130 ° C. or less for kneading and extrusion.
次に、表３に示す配合比にて表１に示すＰＶＣ混和物と表２に示すマスターバッチとを混合して発泡シース３２のシース材料を得た。 Next, the PVC mixture shown in Table 1 and the masterbatch shown in Table 2 were mixed at the compounding ratio shown in Table 3 to obtain a sheath material of the foamed sheath 32.
（ケーブル作製）
３８ｍｍ２の円形圧縮導体１０（外径７．３ｍｍ）にシラン架橋ＰＥを絶縁体１５として肉厚１．２ｍｍとなるように被覆し、外径９．７ｍｍの絶縁導体２０を得た。その後、３層ヘッド付押出機を用いて充実構造の外層シース３１、発泡シース３２、充実構造の内層シース３３を合計厚１．５ｍｍとなるように被覆して対象となる多層シースケーブルを作製した。表３に示した発泡シース３２のシース材料は、押出機の発泡シース形成用投入口に投入された。作製した多層シースケーブルのシース構造体３０の各層の肉厚を表４に示し、各層の組成を表５に示す。また、実施例の多層シースケーブルにおいて採用した各層の肉厚及び組成を表６に示し、比較例の多層シースケーブルにおいて採用した各層の肉厚及び組成を表７に示す。表６〜７中のＡ〜Ｅは表４のＡ〜Ｅに相当し、ａ−１〜ｆは表５のａ−１〜ｆに相当する。
(Cable production)
A 38 mm 2 circular compressed conductor 10 (outside diameter 7.3 mm) was coated with silane crosslinked PE as the insulator 15 to a thickness of 1.2 mm to obtain an insulated conductor 20 with an outside diameter 9.7 mm. After that, using a three-layer headed extruder, the target multi-layer sheath cable was produced by covering the outer layer sheath 31 with a full structure, the foamed sheath 32 and the inner layer sheath 33 with a full structure to a total thickness of 1.5 mm. . The sheath material of the foamed sheath 32 shown in Table 3 was introduced into the inlet for forming the foamed sheath of the extruder. The thickness of each layer of the sheath structure 30 of the produced multilayer sheath cable is shown in Table 4, and the composition of each layer is shown in Table 5. The thickness and composition of each layer adopted in the multilayer sheath cable of the example are shown in Table 6, and the thickness and composition of each layer adopted in the multilayer sheath cable of the comparative example are shown in Table 7. A to E in Tables 6 to 7 correspond to A to E in Table 4, and a-1 to f correspond to a-1 to f in Table 5.
（シース構造体３０の評価及び測定）
次に、上記のようにして作製した多層シースケーブルのシース構造体３０の評価及び測定を以下の方法にて行なった。評価結果及び測定結果を表６〜７に示す。いずれの評価試験も◎及び〇を合格、△及び×を不合格と評価した。
(Evaluation and Measurement of Sheath Structure 30)
Next, evaluation and measurement of the sheath structure 30 of the multilayer sheath cable produced as mentioned above were performed with the following method. The evaluation results and the measurement results are shown in Tables 6 to 7. In each evaluation test, ◎ and を were evaluated as pass, and Δ and X were evaluated as failure.
（耐熱性）
作製した多層シースケーブルからシース構造体３０を剥いだ後、所定のダンベルで打ち抜いて、１００℃×４８ｈｒの空気加熱老化試験（JIS K 6257）を実施した。加熱老化試験後の強度残率が９０％以上、かつ伸び残率が８５％以上となるものを◎とし、強度残率（JIS K 7113）が８５％以上９０％未満、かつ伸び残率（JIS K 7113）が８０％以上８５％未満となるものを○とした。また、強度残率が８５％未満か、伸び残率が８０％未満となるものを×とした。
(Heat-resistant)
After peeling the sheath structure 30 from the produced multilayer sheath cable, it punched out with a predetermined dumbbell and carried out an air heating aging test (JIS K 6257) at 100 ° C. × 48 hr. When the residual strength after heat aging test is 90% or more and the residual elongation is 85% or more is ◎, the residual strength (JIS K 7113) is 85% to less than 90%, and the residual elongation (JIS) A sample in which K 7113) is 80% or more and less than 85% is regarded as ○. Moreover, the thing in which the strength residual ratio is less than 85% or the elongation residual ratio is less than 80% is regarded as x.
（耐寒性）
作製した多層シースケーブルからシース構造体３０を剥いだ後、ＪＩＳＫ６７２３準拠の型枠を用いて幅６ｍｍ、長さ３８ｍｍの試験片を作製した。この試験片を用いて耐寒性試験（JIS K 6723）を実施した。試験結果が−２０℃以下のものを◎、−２０℃を超え−１５℃以下のものを○、−１５℃を超えるものを×とした。
(Cold resistance)
After peeling the sheath structure 30 from the produced multilayer sheath cable, the test piece of width 6 mm and length 38 mm was produced using the formwork based on JISK6723. The cold resistance test (JIS K 6723) was implemented using this test piece. When the test result is -20 ° C or less, ◎, and the temperature exceeding -20 ° C and -15 ° C or less is も の, and the temperature exceeding -15 ° C is ×.
（軽量化）
作製した多層シースケーブルからシース構造体３０を剥いだ後、長さ３０ｃｍの試験片を作製し、質量を測定した。比較例１（組成１からなる外層シース３１のみ）の試験片３０ｃｍ当たりの質量を１００とし、試験片３０ｃｍ当たりの質量が８５以下となるものを◎、８５を超え９０以下となるものを○、９０を超え９９未満となるものを△、９９以上で変化がないとみなされるものを×とした。
(Weight saving)
After peeling the sheath structure 30 from the produced multilayer sheath cable, the test piece of length 30 cm was produced, and mass was measured. The mass per 30 cm of the test piece of Comparative Example 1 (only the outer layer sheath 31 consisting of the composition 1) is 100, and the mass per 85 cm of the test piece is ◎, も の, more than 85 and 以下 90 Those with more than 90 but less than 99 were marked with Δ, and those with 99 or more considered to have no change were marked with x.
（柔軟性）
作製した多層シースケーブルからシース構造体３０を剥いだ後、１００%モジュラス値（JIS K 7113）を測定した。軽量化の評価と同様に、比較例１（組成１からなる外層シース３１のみ）を基準（指標）とした。比較例１の１００%モジュラス値を１００とし、９０以下となるものを◎、９０を超え９５以下となるものを○、９５を超え９９未満となるものを△、９９以上で変化がないとみなされるものを×とした。
(Flexibility)
After peeling the sheath structure 30 from the produced multilayer sheath cable, 100% modulus value (JIS K 7113) was measured. Similar to the evaluation of weight reduction, Comparative Example 1 (only the outer layer sheath 31 made of composition 1) was used as a reference (index). Assuming that the 100% modulus value of Comparative Example 1 is 100, the one with 90 or less is ◎, the one with more than 90 but 95 or less with も の, the one with more than 95 but less than 99 is considered that there is no change at 99 or more. The thing that is
（擦れ白化性）
作製した多層シースケーブルを３０ｃｍに切断したものを２本用意した。１本の両端を固定した状態で、これのほぼ中央部のシース面にもう１本のほぼ中央部のシース面を十字の状態で接触させ、手動で３０回往復作業を実施して、擦れ白化性の指標とした。擦れ白化の少なかった比較例１（組成１からなる外層シース３１のみ）を基準とした。比較例１と同等かもしくはより白化が少ないものを◎、比較例１より劣るが目視で許容範囲にあるものを○、白化が激しいもの（目視で許容範囲にないもの）を×とした。本判断基準の採用は、図３に示したトリプレックスケーブルの擦れ白化度合と３本撚り合せる時にケーブル外面が擦れ白化する度合との相関を示すためである。
(Scrub whitening ability)
Two pieces of the produced multilayer sheath cable cut into 30 cm were prepared. With one end fixed, the other almost center sheath surface is brought into contact with the almost center sheath surface in the state of a cross, and manual reciprocation is performed 30 times to rub and whiten It was used as a sex indicator. The comparative example 1 (only the outer layer sheath 31 consisting of composition 1) in which there was little rubbing whitening was used as a reference. Those having the same or less whitening as Comparative Example 1 were marked with ◎, those inferior to Comparative Example 1 but having visual tolerance within the allowable range were marked with ○, and those with severe whitening (not visible within the visual tolerance) were marked ×. Adoption of this judgment criterion is to show the correlation between the degree of rubbing whitening of the triplex cable shown in FIG. 3 and the degree of rubbing whitening of the outer surface of the cable when three cables are twisted together.
（セル構造体のセル径）
作製した多層シースケーブルから発泡シース３２を採取した。スライスした発泡シース３２の断面写真を取得し、発泡シース３２のセル構造体のセル径（μｍ）を寸法チェック付き電子顕微鏡にて測定した。発泡シース３２を有していない比較例１〜３については測定を行わなかった。
(Cell diameter of cell structure)
The foamed sheath 32 was collected from the produced multilayer sheath cable. The cross-sectional photograph of the sliced foamed sheath 32 was acquired, and the cell diameter (μm) of the cell structure of the foamed sheath 32 was measured by an electron microscope with a size check. The measurement was not performed for Comparative Examples 1 to 3 which did not have the foam sheath 32.
（質量減少率）
作製した多層シースケーブルから外層シース３１と発泡シース３２を分別採取し、長さ３０ｃｍの試験片を作製し、各質量を測定した。１００×（１−（発泡シース３２の質量）/（外層シース３１の質量））の計算式から発泡シース３２のセル構造体形成による質量減少率（％）を求めた。比較例はいずれも単層なので測定を行わなかった。
(Mass reduction rate)
The outer layer sheath 31 and the foamed sheath 32 were separated and collected from the produced multilayer sheath cable, a test piece of 30 cm in length was produced, and each mass was measured. The mass reduction rate (%) due to the formation of the cell structure of the foamed sheath 32 was determined from the formula of 100 × (1− (mass of the foamed sheath 32) / (mass of the outer sheath 31)). Since all the comparative examples were monolayers, no measurements were made.
（実施例１〜１０と比較例１〜５の対比）
図１及び２に示した絶縁導体２０に被覆してなるシース構造体３０が２層もしくは３層構造からなり、発泡シース３２にセル構造体を有している多層シースケーブルにおいて、耐熱性、耐寒性、軽量化、柔軟性、擦れ白化性を評価した結果、表６の通り良好な結果が得られた。いずれも発泡シース３２のセル構造体の径が５００μｍ以下で質量減少率が１５％以上３５％以下（表６）にコントロールされている。より良好な性能を有している構造は、実施例１〜４であり、発泡シース３２のセル構造体の形成のために用いる化学発泡剤の平均粒径が０．５μｍ以上１０μｍ以下、その化学発泡剤が０．５質量％以上８質量％以下含有されたマスターバッチをＰＶＣ混和物に対して０．５質量部以上５質量部以下添加した系である。また、シース構造体３０の各層の材料として、同一のＰＶＣ混和物を用いる場合は、可塑剤含有量が１５質量％以上３０質量％以下、炭酸カルシウム含有量が５質量％以上３０質量％以下であることが望ましいことが把握できた。
(Comparison of Examples 1 to 10 and Comparative Examples 1 to 5)
In a multilayer sheath cable in which a sheath structure 30 coated with the insulated conductor 20 shown in FIGS. 1 and 2 has a two-layer or three-layer structure, and a foam sheath 32 has a cell structure, heat resistance and cold resistance As a result of evaluating the properties, weight reduction, flexibility, and whitening resistance, good results were obtained as shown in Table 6. In all cases, the diameter of the cell structure of the foamed sheath 32 is controlled to 500 μm or less, and the mass reduction rate is controlled to 15% to 35% (Table 6). The structures having better performance are Examples 1 to 4, and the average particle size of the chemical blowing agent used for forming the cell structure of the foam sheath 32 is 0.5 μm or more and 10 μm or less, It is the system which added 0.5 mass part or more and 5 mass parts or less of the masterbatch in which 0.5 mass% or more and 8 mass% or less of foaming agent was contained with respect to a PVC mixture. When the same PVC mixture is used as the material of each layer of the sheath structure 30, the plasticizer content is 15% by mass to 30% by mass, and the calcium carbonate content is 5% by mass to 30% by mass It was understood that it was desirable to have.
一方、シース構造体３０を１層の外層シース３１又は発泡シース３２だけからなる構成とした場合は、表７の比較例の通り、耐熱性、耐寒性、軽量性、柔軟性、擦れ白化性を両立する結果は得られなかった。 On the other hand, when the sheath structure 30 is configured to include only the outer layer sheath 31 or the foam sheath 32 of one layer, heat resistance, cold resistance, lightness, flexibility, rubbing whitening resistance are obtained as in the comparative example of Table 7. No compatible results were obtained.
以上、表６〜７に示してきた通り、本発明の多層シースケーブルによれば、耐熱性、耐寒性、軽量性、柔軟性を確保しつつ、擦れ白化性に優れることが理解できる。 As described above in Tables 6 to 7, according to the multilayer sheath cable of the present invention, it can be understood that the rubbing whitening property is excellent while securing heat resistance, cold resistance, lightness and flexibility.
このような特性、特に擦れ白化性に優れているので、図３に示すように、本発明の多層シースケーブル３本を撚り合わせたトリプレックスケーブルに適用することができる。 Such characteristics, in particular rubbing and whitening properties, are excellent, and as shown in FIG. 3, it can be applied to a triplex cable in which three multilayer sheath cables of the present invention are twisted.
なお、本発明は本発明の主旨を変えない範囲で種々変更実施可能なことは勿論である。 Of course, the present invention can be variously modified without departing from the scope of the present invention.
１,１０ 導体、２，３２ 発泡シース、１５ 絶縁体、２０ 絶縁導体、３０ シース構造体、３１ 外層シース、３３ 内層シース 1, 10 conductors, 2, 32 foamed sheaths, 15 insulators, 20 insulated conductors, 30 sheath structures, 31 outer sheaths, 33 inner sheaths
Claims (4)
前記シース構造体が、最外層シースとしての非発泡構造の外層シースと、前記外層シースの内側に設けられた、セル構造体を有する発泡シースとを含み、
前記発泡シースの前記セル構造体の形成のために用いる化学発泡剤の平均粒径が０．５μｍ以上１０μｍ以下であり、その化学発泡剤が０．５質量％以上８質量％以下含有されたマスターバッチをポリ塩化ビニル混和物１００質量部に対して０．２質量部以上５質量部以下で添加した発泡シース材料を押出して前記発泡シースを形成する多層シースケーブルの製造方法。 A method of manufacturing a multilayer sheath cable, wherein a sheath structure comprising a plurality of layers is provided on the outside of an insulated conductor in which a conductor is covered with an insulator,
The sheath structure includes an outer layer sheath having a non-foamed structure as an outermost layer sheath, and a foam sheath having a cell structure provided inside the outer layer sheath,
An average particle size of a chemical foaming agent used to form the cell structure of the foam sheath is 0.5 μm to 10 μm, and the master contains 0.5 mass% to 8 mass% of the chemical foaming agent The manufacturing method of the multilayer sheath cable which extrudes the foamed sheath material which added the batch by 0.2 mass part or more and 5 mass parts or less with respect to 100 mass parts of polyvinyl chloride blends, and forms the said foamed sheath.
前記シース構造体が、最外層シースとしての非発泡構造の外層シースと、前記外層シースの内側に設けられた、セル構造体を有する発泡シースと、前記発泡シースの内側に設けられた非発泡構造の内層シースとを含み、
前記外層シース、前記発泡シース及び前記内層シースの材料として、可塑剤含有量が１５質量％以上３０質量％以下であり、炭酸カルシウム含有量が５質量％以上３０質量％以下であるポリ塩化ビニル混和物を用いる多層シースケーブルの製造方法。 A method of manufacturing a multilayer sheath cable, wherein a sheath structure comprising a plurality of layers is provided on the outside of an insulated conductor in which a conductor is covered with an insulator,
An outer sheath having a non-foamed structure as the outermost sheath, a foam sheath having a cell structure provided inside the outer sheath, and a non-foamed structure provided inside the foam sheath. Inner layer sheath and
As a material of the outer layer sheath, the foamed sheath, and the inner layer sheath, polyvinyl chloride is mixed with a plasticizer content of 15% by mass to 30% by mass and a calcium carbonate content of 5% by mass to 30% by mass Method of manufacturing a multilayer sheath cable using a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016043570A JP6503311B2 (en) | 2016-03-07 | 2016-03-07 | Method of manufacturing multilayer sheath cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016043570A JP6503311B2 (en) | 2016-03-07 | 2016-03-07 | Method of manufacturing multilayer sheath cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2017162569A JP2017162569A (en) | 2017-09-14 |
| JP6503311B2 true JP6503311B2 (en) | 2019-04-17 |
Family
ID=59857073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016043570A Active JP6503311B2 (en) | 2016-03-07 | 2016-03-07 | Method of manufacturing multilayer sheath cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6503311B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7092567B2 (en) * | 2018-06-13 | 2022-06-28 | 矢崎エナジーシステム株式会社 | Flat electric wire / flat cable |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613063Y2 (en) * | 1977-07-07 | 1986-01-31 | ||
| JPS58147905A (en) * | 1982-02-26 | 1983-09-02 | 古河電気工業株式会社 | Anti-freezing communication cable |
-
2016
- 2016-03-07 JP JP2016043570A patent/JP6503311B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017162569A (en) | 2017-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2374707C2 (en) | Electric power cable containing foamed polymeric layers | |
| EP3264424A1 (en) | Insulated wire | |
| US9305679B2 (en) | Vinyl chloride resin composition, electric wire and cable | |
| JP6012438B2 (en) | Flat cable | |
| JP6503311B2 (en) | Method of manufacturing multilayer sheath cable | |
| JP6022514B2 (en) | Vinyl chloride resin composition for cable sheath material and highly flame retardant cable | |
| DE112016005008B4 (en) | HEAT RESISTANT FLEXIBLE POWER CABLE AND WIRE HARNESS USING THESE | |
| JP6359880B2 (en) | Flame retardant flexible resin composition, and resin tube and insulated wire using the same | |
| JP5687024B2 (en) | Insulating resin composition for insulated wires, insulated wires and cables | |
| JP6113823B2 (en) | Insulating resin composition for insulated wires, insulated wires and cables for transmitting signals of frequencies in the GHz band | |
| US10755834B2 (en) | Insulated wire | |
| JP6679436B2 (en) | Resin composition, cable and method for producing the same | |
| DE112012002859T5 (en) | Flame retardant resin composition and insulated conductor wire | |
| US10442949B2 (en) | Composition for electric wire coating material and insulated electric wire | |
| US10784018B2 (en) | Insulated wire | |
| US10872712B2 (en) | Insulated wire | |
| JP6056105B2 (en) | Foam sheath cable | |
| JP2017069130A (en) | Insulation wire | |
| JP2015028899A (en) | Insulated wire | |
| WO2024075795A1 (en) | Foam-insulated electric wire, communication cable, and method for manufacturing same | |
| JP6892368B2 (en) | How to make an electric cable | |
| JP6933547B2 (en) | Electric cable and its manufacturing method | |
| JP5926827B2 (en) | Insulating resin composition for insulated wires, insulated wires and cables | |
| EP3480829B1 (en) | Insulated electric wire | |
| JP2016143506A (en) | Insulated wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20180322 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20180727 |
|
| A871 | Explanation of circumstances concerning accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A871 Effective date: 20180727 |
|
| A975 | Report on accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A971005 Effective date: 20180829 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180904 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181031 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20181031 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181120 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20181218 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20190215 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190226 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190325 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6503311 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |