JP2021158111A - 車載ネットワークケーブル用電線及び車載ネットワークケーブル - Google Patents
車載ネットワークケーブル用電線及び車載ネットワークケーブル Download PDFInfo
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- JP2021158111A JP2021158111A JP2021047294A JP2021047294A JP2021158111A JP 2021158111 A JP2021158111 A JP 2021158111A JP 2021047294 A JP2021047294 A JP 2021047294A JP 2021047294 A JP2021047294 A JP 2021047294A JP 2021158111 A JP2021158111 A JP 2021158111A
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- fluororesin
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- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229920001577 copolymer Polymers 0.000 claims abstract description 36
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 34
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- -1 alkyl vinyl ether Chemical compound 0.000 claims abstract description 22
- 238000002844 melting Methods 0.000 claims abstract description 21
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- KHXKESCWFMPTFT-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2-trifluoroethenoxy)propane Chemical compound FC(F)=C(F)OC(F)(F)C(F)(F)C(F)(F)F KHXKESCWFMPTFT-UHFFFAOYSA-N 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
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- 239000005995 Aluminium silicate Substances 0.000 description 1
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
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- 229910052736 halogen Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
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- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
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- H01B3/445—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
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Abstract
Description
なおHFP単位の含有量およびPAVE単位の含有量は、19F−NMR法により測定することができる。
上記比誘電率は、25℃、6GHzで空洞共振器摂動法にて測定する値である。
上記MFRは、小さいほうがMIT曲げ寿命および150℃での引張伸びに優れ、38g/10分以下が好ましく、37g/10分以下がより好ましい。また、径の小さい導体上に静電容量が均質な薄肉の被覆層を作製することができる点からはMFRが大きいほうが優れており、21g/10分以上が好ましく、22g/10分以上がより好ましく、24g/10分以上が更により好ましく、30g/10分以上が特に好ましい。
上記MFRは、ASTM D1238−98に準拠し、372℃、5kg荷重で測定することができる。
上記融点は、示差走査熱量計を用い、ASTM D−4591に準拠して、昇温速度10℃/分にて熱測定を行い、得られた吸熱曲線のピーク温度から求める値である。
上記MIT曲げ寿命は、圧縮成形により、0.2mm厚のプレスシートを作製し、ASTM D−2176に準拠して、試験温度は23℃、回転角度は左右各135度、屈曲速度は175cpmのMIT測定で得られる値である。
本開示の車載ネットワークシステムは、少なくとも1つの車載コンピュータを備えればよく、2以上の車載コンピュータを備えていてもよい。上記車載コンピュータと本開示の車載ネットワークケーブルとは直接接続されていてもよいし、間接的に接続されていてもよい。例えば、本開示の車載ネットワークケーブルと上記車載コンピュータとが、ハブ、ルーター等を介して接続されていてもよい。
上記車載コンピュータは、車両に搭載されるコンピュータであれば限定されず、例えば、車載電子制御ユニット(車載用ECU)、車載テレマティックコントロールユニット(車載TCU)等が挙げられる。
本開示の車載ネットワークシステムは、第1車載コンピュータと、第2車載コンピュータと、第1車載コンピュータと第2車載コンピュータとを接続する本開示の車載ネットワークケーブルと、を備えるものであってもよい。
(1)融点
示差走査熱量測定装置(商品名:X−DSC7000、日立ハイテクサイエンス社製)を用い、ASTM D−4591に準拠して、昇温速度10℃/分にて熱測定を行い、得られた吸熱曲線のピークから融点を求めた。
ASTM D1238−98に準拠し、メルトインデックステスター(東洋精機製作所社製)を用い、約6gの樹脂を372℃に保たれたシリンダーに投入し、5分間放置して温度が平衡状態に達した後、5kgのピストン荷重下で直径2mm、長さ8mmのオリフィスを通して樹脂を押し出して、単位時間(通常10〜60秒)に採取される樹脂の質量(g)を測定する。同一試料について3回ずつ測定を行い、その平均値を10分間当たりの押出量に換算した値(単位:g/10分)を測定値とした。
NMR分析装置(たとえば、ブルカーバイオスピン社製、AVANCE300 高温プローブ)を用い、測定温度を(ポリマーの融点+20)℃として19F−NMR測定を行い、各ピークの積分値から求めた。
(ポリマーの融点+約30℃)の温度で溶融押出を行い、直径2.3mm×長さ80mmの円柱状の測定サンプルを作製した。この測定サンプルについて、ネットワークアナライザー(関東電子応用開発社製)を用いて、空洞共振器摂動法にて、6GHzでの比誘電率及び誘電正接を測定した(試験温度25℃)。比誘電率の値は、測定値の小数点2桁目を四捨五入し、誘電正接の値は、測定値の小数点5桁目を四捨五入した値とした。
圧縮成形により、0.2mm厚のプレスシートを作製し、ASTM D−2176に準拠して、MIT測定を行った。No.307 MIT形屈曲試験機(安田精機製作所製)を用い、測定条件は、試験温度23℃、回転角度は左右各135度、屈曲速度175cpmとした。MIT曲げ寿命は、耐屈曲性の指標である。この値が高いほど、耐屈曲性に優れ、力学的なストレスに対する耐クラック性が高い。
実施例または比較例において得られたペレットを、ヒートプレス成形機を用いて、直径120mm、1.5mm厚の円盤状に成形し、試験片(圧縮成形)を得た。上記試験片から、ASTM V型ダンベルを用いてダンベル状試験片を切り抜き、得られたダンベル状試験片を用いて、オートグラフ(島津製作所社製AGS−J 5kN)を使用して、ASTM D638に準じて、50mm/分の条件下で、150℃で引張伸びを測定した。
静電容量測定器Capac HS(Type:MR20.50HS、Zumbach社製)を用いて2時間測定し、工程能力指数(Cp)として算出した。なお、Cpは、逐次USYS 2000(Zumbach社製)に蓄え、上限(USL)を+1.0(pf/inch)、下限(LSL)を−1.0(pf/inch)に設定して、解析した。
なお、表1に示すようにコーンブレイクが発生した場合、連続成形ができず、静電容量ブレ幅を求めることができなかった。
各実施例・比較例の電線成形で得られた被覆電線から、長さ20cmの電線を10本切り取り、試験片とした。比較例1の電線は、被覆電線ができている部分を選別して切り取り試験片とした。
この試験片を試験片と同径の電線に巻き付け150℃にて1ケ月加熱処理を行った。室温にて冷却後、電線を巻き戻して、目視及び拡大鏡を用いて、亀裂の発生した電線の個数を数えた。一本の電線中に亀裂が一箇所でもあれば亀裂有りとした。亀裂有りと確認された電線がない場合を○、1本以上の場合×とした。結果を表1に示す。
特表2011−514407号公報の実施例2と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.9/11.1/1.0〔質量比〕、МFR24[g/10分])のフッ素化されたペレットを得た。得られたペレットを用いて共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて以下の成形条件で電線被覆成形を行って電線(ソリッド線)を得た。電線被覆押出成形条件は以下の通りである。
a)芯導体:軟鋼線AWG24(American Wire Gauge)芯線径 20.1mil
b)被覆厚み:7.2mil
c)被覆電線径:34.5mil
d)電線引取速度:1800フィート/分
e)溶融成形(押出)条件:
・シリンダー軸径=2インチ。L/D=30の単軸押出成形機
・ダイ(内径)/チップ(外形)=8.71mm/4.75mm
・押出機の設定温度:バレル部Z1(338℃)、バレル部Z2(360℃)、バレル部Z3(371℃)、バレル部Z4(382℃)、バレル部Z5(399℃)、クランプ部(404℃)、アダプター部(404℃)、クロスヘッド部(404℃)、ダイ部(404℃)に、芯線予備加熱を140℃に設定した。
特表2010−539252号公報の実施例1と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.6/11.5/0.9〔質量比〕、МFR35[g/10分])のフッ素化されたペレットを得た。得られたペレットを用いてTFE/HFP/PPVE共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして電線被覆成形を行って電線(ソリッド線)を得た。30000メートル平均の静電容量ブレ幅を評価した結果を表1に示す。
特許6134818号公報の実施例1と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.5/11.5/1.0〔質量比〕、МFR37[g/10分])のフッ素化されたペレットを得た。得られたペレットを用いてTFE/HFP/PPVE共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして電線被覆成形を行って電線(ソリッド線)を得た。30000メートル平均の静電容量ブレ幅を評価した結果を表1に示す。
国際公開第2001−018076号の実施例3と同じ方法でTFE/HFP共重合体(TFE/HFP=86.5/13.5〔質量比〕、МFR17[g/10分])のペレットを得た。得られたペレットを用いてTFE/HFP共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして被覆成形を試みたが連続成形できなかった。
特表2010−539252号公報の実施例3と同じ方法でTFE/HFP/PPVE共重合体(TFE/HFP/PPVE=87.6/11.5/0.9〔質量比〕、МFR44[g/10分])のペレットを得た。得られたペレットを用いてTFE/HFP/PPVE共重合体の物性を評価した結果を表1に示す。また、得られたペレットを用いて、実施例1と同様にして電線被覆成形を行って電線(ソリッド線)を得た。30000メートル平均の静電容量ブレ幅を評価した結果を表1に示す。
Claims (5)
- 直径が0.5〜1.5mmである電線であって、導体と、その周囲を被覆する被覆材とを備え、前記被覆材は、テトラフルオロエチレン/ヘキサフルオロプロピレン/パーフルオロ(アルキルビニルエーテル)共重合体であって、372℃、5kg荷重で測定したメルトフローレートが20〜40g/10分、25℃、6GHzで測定した比誘電率が2.2以下、融点が250℃以上、MIT曲げ寿命が2000回以上、150℃での引張伸びが300%以上であるフッ素樹脂を含むことを特徴とする車載ネットワークケーブル用電線。
- 前記フッ素樹脂は、25℃、6GHzで測定した誘電正接が0.0006以下である請求項1記載の車載ネットワークケーブル用電線。
- 前記フッ素樹脂は、テトラフルオロエチレン/ヘキサフルオロプロピレン/パーフルオロ(プロピルビニルエーテル)共重合体である請求項1又は2記載の車載ネットワークケーブル用電線。
- 請求項1〜3のいずれかに記載の車載ネットワークケーブル用電線を含むことを特徴とする車載ネットワークケーブル。
- 相互に撚られた一対の電線を備えたツイストペアケーブルを備え、該一対の電線の少なくとも一方が請求項1〜3のいずれかに記載の車載ネットワークケーブル用電線である請求項4記載の車載ネットワークケーブル。
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