1242576 ⑴ 玖、發明說明 【發明所屬之技術領域】 本發明係有關高介電率之橡膠組成物及輸電電纜構件 者。 【先前技術】 做爲輸電電纜所被泛用之CV電纜係於其連接部或終 端部以如：內部電極處理部、外部半導電層處理部、應力 濾錐起動部、或、電纜鐵心與連接部品之界面部等，以 絕緣做爲必要個處者，而，藉由橡膠模型嵌裝、膠帶卷繞 ，環氧基注入等作業形成絕緣層，惟，其較少以手動作業者 〇 手動作業所形成之絕緣層於其界面極易伴隨非常大不連 續性之微小突起、異物、點等曲率之特異點，此特異點附近 絕緣層內之電界呈錐度，爲確實防止絕緣破壞，小心經意及 高度的專門技術，導致施工時間及施工成本大增。 此點，電場錐度可藉由提昇絕緣材料之介電率緩和以先 行塡充碳黑等之導電性塡料後，提昇比介電率之橡膠組成 物或丙烯橡膠或氟橡膠等先行高介電率之橡膠組成物用於 絕緣材料者被討論之。 惟’塡充導電性塡料後，形成導電性粒子鏈，且，高 介電率橡膠之聚合物極性大，介電正切變小，導致絕緣破 壞電壓或絕緣抵抗下降’均產生大幅降低絕緣性之問題。 因此，嘗試於橡膠組成物中塡充如：鈦酸鋇、或氧化鈦 -6 - (2) 1242576 等比介電率較高之塡料，惟，此時，僅提昇塡料之塡充量 ’提昇橡膠組成物之介電率後則大幅降低絕緣性之問題產 生。 【發明內容】 本發明鑑於上述，而以提供一種高介電率下仍不致大 幅降低絕緣性之高介電率橡膠組成物及輸電電纜構件做爲 該課題者。 該課題係藉由申請項1〜6所載之本發明而解決者。 申請項1之發明係以含有準備由橡膠系聚合物所成之基 材步驟與室溫〜90 °C之溫度範圍下，準備由比介電率爲2000 以上之鈦酸鋇系材料之粉末所成塡充材料之步驟，以及塡充 該塡充材料於該基材後，生成比介電率1 〇以上之高介電率 橡膠組成物之步驟的流程所生成者爲其特徵之高介電率橡 膠組成物者。 申請項2之發明係如申請項1之高介電率橡膠組成物者 ，其特徵係該橡膠組成物之比介電率爲1 5以上者。 申請項3之發明係如申請項2之高介電率橡膠組成物者 ，其特徵係該橡膠組成物之比介電率爲20以上者。 申請項4之發明係如申請項1之高介電率橡膠組成物者 ，其特徵係該準備該塡充材料之步驟爲含有使該鈦酸鋇系材 料之居里溫度藉由添加轉移劑進行位移之步驟以及，以脫離 子水洗淨該鈦酸鋇系之材料後，去除離子性不純物之步驟者 (3) 1242576 申請項5之發明係如申請項1之高介電率橡膠組成物者 ’其特徵係該流程更含有藉由過氧化物交聯該橡膠組成物 內橡膠系聚合物之步驟，以及熱處理該橡膠組成物後藉由 該交聯後去除所產生該過氧化物之分解殘渣步驟者。 申s靑項6之發明其特徵係由申請項1〜5中任一項之高介 電率橡膠組成物所成之輸電電纜構件者。 【實施方式】 以下，進行本發明實施形態之詳細說明。 圖1係代表本發明實施形態一群高介電率（比介電率 1 0以上）之橡膠組成物MX的生成步驟與一部份內包此步 驟pR之輸電電纜匣式電極層RE之製造步驟MF者。 本貫施例之尚介電率橡膠組成物]VIX係後述未硫化狀 態之高介電率橡膠材料MXl (以下亦稱「未硫化橡膠材料 」。）與熱處理前之高介電率硫化橡膠材料μ X 2 (以下亦 稱「硫化橡膠材料」。）以及熱處理後之高介電率硫化橡 膠材料MX3 (以下亦稱「熱處理橡膠材料」。）之總稱者 。又’本實施例之匣式電極層RE具有相同於後述實施例所 示之內部半導電橡膠層SC與高介電率橡膠層HP之組合構成 及形狀。又，以下說明中，即使相同高介電率，其視爲化 學性組成物MX時，與視爲電極層RE$製造經過品時之命名 不同。 該高介電率橡膠組成物MX之生產步驟PR係由準備橡 膠組成物MX之基材M10={M10，：j = 1〜$ (自然數）}之步驟 (4) 1242576 PR1與準備塡充於該基材M10之塡充材料Ml 1 = {M1 U:k=l〜k ( 自然數）}之步驟PR2，以及於基材M10中添加添加劑 以12=丨％12".^11=1〜1^(自然數）、m=l〜Μ (自然數）}後塡充塡 充材料11後，更附加硫化劑-13=丨1^1311=1〜？（自然數）}後 生成未硫化橡膠材料ΜΧ1之步驟PR3、及加入該未硫化橡膠 材料ΜΧ1後，生成熱處理橡膠材料ΜΧ3之熱處理PR5所成者 〇 另外，電極層RE之製造步驟MF係進行以該未硫化橡膠 材料ΜΧ1之一形態高介電率橡膠基材Μ22做成成型材料之高 介電率橡膠層HP之成型，再分開進行另行準備之半導電橡 膠基材MS0做成成型材料之半導電橡膠層SC之成型漸次成型 步驟MF1與高介電率橡膠層HP之成型及半導電橡膠層SC之 成型同時進行之一體成型步驟MF2者。因此，漸次成型步驟 MF1、一體成型步驟MF2均內包橡膠組成物生成步驟PR之硫 化處理PR4與熱處理PR5者。 準備該基材M10之步驟PR1時，選自直接使一群橡膠系 聚合物基材M01 = {M01i:i=l〜I (自然數）中一種基材m01，( 本實施例中i= 1)做爲基材Μ 10之選擇步驟S 00、以及二種以 上基材Μ01混合後取得基材Μ10之混合步驟S01含有之。 該橡膠系聚合物基材MO 1係使乙烯丙烯橡膠聚合物（ i=l)、聚矽氧橡膠聚合物（i = 2) 、丁基橡膠聚合物（i = 3) 等非交聯橡膠系聚合物於螺旋狀、塊狀、顆粒狀、或粉末狀 中進彳了處理之基材者。 準備該塡充材料Μ 11之步驟PR2係含有使氧化鈦結晶粉 (5) 1242576 末所成之氧化鈦基材M02溶解於碳酸鋇結晶粉末所成之碳酸 鋇基材M03水溶液後，取得介電率高的鈦酸鋇結晶之溶解步 驟S 0 4、此步驟S 0 4所取得駄酸鋇結晶所成之材料b τ 1中添加 緦系（亦即SrTiOs之構成元素）之位移成锆系（亦即ZrTl〇3 之構成元素）之位移等轉移劑Ma後，鈦酸鋇結晶由強介電 性往常介電性轉移之居里溫度（最高1 2〇 t左右）之變更 後’取得最大介電率位移至室溫附近之工業用級高介電 率鈦酸鋇系材料BT2之位移步驟S08，以及該溶解步驟s〇4取 得之鈦酸鋇結晶所成之材料BT1，或該位移步驟s〇8取得之 鈦酸鋇系材料BT2塡充於粉末後，取得塡充材料Mllk (]<：=1或 k = 2，本實施例爲後者）之粉末化步驟S 0 5者。 又，該粉末化步驟S 0 5之後，該取得之欽酸鋇系材料 BT1、BT2之粉末更以結合材料Mb固化成型後進行煅燒之煅 燒步驟S06與此锻燒步驟S06取得之锻燒物經粉碎後藉由微粒 化後以欽酸鋇系之材料B T 3，B T 4之粉末做爲塡充材料μ 11 k (k=3或k = 4)取得粉碎步驟S07之過程者宜。又，以脫離子水 MC洗淨此粉碎步驟S07取得之鈦酸鋇系材料BT4之粉末後， 去除離子性不純物後，以鈦酸鋇系材料BT5之粉末做爲塡充 材料M1U (k=5 [ = K])取得洗淨步驟S09之過程者爲更佳者 ，本實施例係依此方式者。 生成該未硫化橡膠材料MX 1之步驟PR3係含有步驟PR 1所 準備之基材M10所需量（此爲100重量份者’以下相同。） 中將步驟PR2所準備之塡充材料Μ 1 1以適量（依塡充材料Μ 1 1 之介電率及橡膠組成物MX之所期待特性不同而異’而本實 -10- (6) 1242576 施例爲300〜750重量份者）進行塡充後，更加入添加劑M12 ，以較高溫度進行混煉後，生成硫化劑未添加狀態之混煉橡 膠材料M20之高溫混煉步驟S10與於該混煉橡膠材料M20中加 入硫化劑Μ 1 3後，於較低溫度下進行混煉後生成未硫化狀態 之混煉橡膠材料M2 1之低溫混煉步驟S 1 1以及以所定網篩過 濾該混煉橡膠材料M2 1後去除異物之後取得未硫化狀態之高 介電率橡膠基材Μ22之過濾步驟。 該添加劑M12={M12n.m丨中有爲調整高介電率橡膠基材 M22之機械特性的添加劑（n=l)，爲調整電氣特性之添加 劑（n = 2)、以及爲調整化學特性之添加劑 （n=3)者，依 其橡膠基材M22所期待特性決定選取劑種及混合量。機械特 性調整用添加劑{M12Km丨中含有軟化劑（如：Sanper油[商 品名]等工程油）M12H、補強劑（如：粘土等無機塡料） Μ 1 2 ! ·2、潤滑劑（如：石鱲、硬脂酸）Μ 1 2! .3、張力特性提昇 劑（如：aerozil [商品名]等二氧化矽或白碳黑）Μ 1 2 i _4者 ，電氣特性調整用添加劑{M122.m}中含有安定劑（如：介電 正切提昇用紅丹塗漿）Ml 22|1者、化學特性調整用添加劑 {Ml29.m}*含有抗老化劑（如：n0CUk [商品名]等苯酚系抗 氧化劑）M129.i者。 該硫化劑{M13p丨中，含有DCP ( dicumylperoxide )等 之過氧化物交聯劑Μ 1 3 i及硫黃Μ 1 3 2。 該製造步驟MF之漸次成型步驟MF 1與一體成型步驟MF2 兩者均使高介電率橡膠基材Μ22進行滾壓後切取所定尺寸後 ，製造高介電率橡膠薄片M2 3之高介電率橡膠薄片製造步 -11 - (7) 1242576 驟S 1 3，以及與此S 1 3平行後分別使所期待特性之半導電橡膠 基材M42，M52進行滾壓後切取所定尺寸後由製造所對應之 半導電橡膠薄片M43、M53之半導電橡膠薄片製造步驟S43、 S53開始。 漸次成型步驟MF1係含有將高介電率橡膠薄片M23裝置 於高介電率橡膠層HP之模具後，高溫下加熱硫化成型後， 製造高介電率橡膠成型品M30之成型步驟S20、與適溫下加 熱處理其高介電率橡膠成型品M30後去除該過氧化物交聯劑 M13之硫化後的分解殘渣後，更乾燥橡膠成型品M30後，取 得熱處理之高介電率橡膠成型品M3 1 (亦即高介電率橡膠層 HP)之加熱步驟S21，以及，再將該橡膠成型品M31與半導 電橡膠薄片M43裝置於半導電橡膠層SC之模具後，進行加熱 成型後製造高介電率橡膠層HP與半導電橡膠成型品M44 (亦 即導電橡膠層SC)相互之組合M45 (即橡膠電極層RE)之成 型步驟S44者。 一體成型步驟MF2係含有裝置高介電率橡膠薄片M23與 半導電橡膠薄片M53於橡膠電極層RE之模具後，高溫下加熱 後硫化成型之後製造高介電率橡膠成型品M60 (對應M30) 與其M60呈一體之半導電橡膠成型品M62 (即半導電橡膠層 SC)相互組合之橡膠電極層成型品M64之成型步驟S30、以 及適溫下加熱該橡膠成型品M64後，由橡膠成型品M60之部 份去除該過氧化物交聯劑Μ1 3硫化後之分解殘渣，更乾燥橡 膠成型品Μ64後，製造被熱處理之高介電率橡膠成型品M61 (即高介電率橡膠層HP)與做爲該半導電橡膠層sc之半導電 -12- (8) 1242576 橡膠成型品M62組合而成之電極層成型品M65 (亦即，橡膠 電極層RE)之加熱步驟S3 1者。 該高介電率橡膠組成物生成步驟之未硫化橡膠材料之 硫化處理PR4係內包該製造步驟MF之成型步驟S20，S30，且 ，生成步驟PR之硫化橡膠材料之熱處堙PR5爲內包製造步驟 MF之加熱步驟S 2 1，S 3 1者。加熱步驟S 2 1、S 3 1於乾燥空氣 中，或必要時於氮等不活性氣體中，使成型品M30，M60以 6〜24小時、於1〇〇〜140°C下進行加熱之。 以上，橡膠組成物M20〜M23係含於該未硫化橡膠材料 MX1者，橡膠組成物M30、M60含於該硫化橡膠材料MX2者 、橡膠組成物M31、M61含於該熱處理橡膠材料MX3者。 以所定寬度及長度切取該高介電率橡膠薄片M23，附與 適當粘著性後，製造手卷絕緣用橡膠螺旋或膠帶等亦可，或 以該高介電率橡膠基材M22做成凝膠狀絕緣用基材之使用亦 可〇 半導電橡膠基材M42、M52亦可於該基材M10中添加添 加劑M12及硫化劑M13後，塡充碳黑後生成者。 輸電電纜構件考量其張力強度、延伸、永久壓縮變形等 機械性特性、加工性、價格等，以過氧化二異丙苯等過氧化 物聚合物交聯後之高介電率橡膠組成物所構成者宜，特別 以過氧化物交聯乙烯丙烯橡膠（EPDM)者爲更佳。 塡充材料Μ 1 1於輸電電纜之使用溫度域之室溫（約25 °C )至90 °C之溫度範圍下，其比介電率爲2，000以上者宜， 較佳者爲2，000〜20，000者、粒徑爲1〜1〇μηι之鈦酸鋇系材料 -13- 1242576 Ο) 粉末者宜。 塡充材Mil之比介電率不足2，000時，相較於2000以上 者，則對於基材Μ 1 0之塡充量增加，取得高介電率橡膠組成 物MX之介電正切（tan 5)、絕緣破壞電壓（BDV)、絕緣 抵抗（p )等電氣特性均降低。 鈦酸鋇系材料可以各種級數生成之，而以添加緦系、銷 系等轉移劑後提高介電率之工業用級數之材料BT2，BT4， BT5者爲較佳者。 此等工業用級數之材料BT2，BT4，BT5中，未經洗淨步 驟S09之BT2，BT4含離子性不純物。 此離子性不純物會降低高介電率橡膠組成物MX輸電 電纜所使用含商用數周波數之低周波域的電氣特性（tan 5 ' BDV p )。 因此，以經過脫離子水M d去除離子性不純物之洗淨步 驟S09所製造之鈦酸鋇系材料BT5之粉末M1U (k=5)用於塡 充材料者宜。洗淨步驟S09中，使脫離子水中之基材進行超 音波洗淨者佳。 塡充材料Mil之塡充量分別爲1〇〇重量份基材M10之300 重量％份以上（較佳爲400重量份以上）、400重量份（較佳 爲500重量份以上）、或500重量份以上（較佳爲600重量份 以上）後，可使高介電率橡膠組成物MX之比介電率做成10 以上、15以上、或20以上者。當塡充材料Mil之塡充量不足 300重量份時，則橡膠組成物MX之介電率將不足。反之， 塡充材料Mil之塡充量超出400重量份時，特別是超出500重 -14- (10) 1242576 量份時’則務必考量降低橡膠組成物MX之介電正切、絕緣 破壌電壓、絕緣抵抗等之絕緣特性及其平衡。 此點’本發明者藉由實驗證實過氧化物交聯之組成物 X含多量工業用級之鈦酸鋇系材料BT2、BT4時絕緣特性之 降低係起因於該材料BT2，BT4所附著之離子性不純物導電 作用後’且，該離子性不純物與交聯之橡膠組成物MX中亦 起因於之後所殘留交聯劑Μ 1 3之分解殘渣（如：過氧化二異 丙苯交聯後所殘留之苯乙酮與枯醇）相互複合作用後產生 界面分極者。 此欲平衡高介電率橡膠組成物MX之介電率與絕緣特性 時，以藉由該洗淨步驟S09去除離子性不純物之鈦酸鋇系材 料BT5之粉末M1U (k = 5)做爲塡充材料使用者可提昇橡膠組 成物MX之介電率爲理想者，且，藉由該加熱步驟S2i、S31 去除交聯劑之分解殘渣者爲更理想。 圖2係代表以乙烯丙烯橡膠聚合物MOl· (i=i).做爲基劑 之高介電率橡膠組成物MX之具體例NO. 1〜N0.7、及其電氣 特性試驗結果之一覽表（表1)。 該高介電率橡膠組成物例NO_1〜Ν〇·7係於1〇〇重量份基 材Μ 1 01中，添加含有工程油及抗氧化劑之添加劑]y[ 1 2與4重 量份之過氧化二異內苯（交聯劑）Ml 3後，以下所示3計（A ，B，C)之任意鈦酸鋇系材料之粉末Μ 1 1塡入3 〇 〇重量份 (NO.3) 、450重量份（NO.2) 、500重量份（NO.4) 、650重 量份（ΝΟ·1)、或750重量％份（1^〇.5以〇.7)後被生成之。 粉末Α:ΒΤ335 (商品名）富士鈦工業製、 -15- (11) 1242576 比介電率1600 (室溫〜90°C ) 粉末B:BT325 (商品名）富士鈦工業製、 比介電率4000 (室溫〜90°C ) 粉末C:BT206 (商品名）富士鈦工業製、 比介電率1 6500 (室溫） 3 000 ( 9 0 °C ) 高介電率橡膠組成物例如NO.6及N0.7中，藉由加熱步 驟S21、S31 (120°C、12小時）去除交聯劑M13之分解殘渣。 又，高介電率橡膠組成物例N0.7中，利用脫離子水Md之洗 淨步驟洗淨塡充材料Mil (粉末C)後，進行乾燥之。 各例N0.1〜N0.7於未硫化橡膠材料MX1之生成步驟PR3 中均使取得高介電率橡膠基材M22呈厚度2mm之平薄片形狀 進行成型•硫化後製成試料，測定該比介電率、介電正切 及絕緣抵抗。更作成附與有效部厚度爲0.5mm凹埋部之薄片 形狀試料，測定絕緣破壞電壓。 介電率及介電正切係以50Hz、ΙΚν之條件下進行測定者 、絕緣抵抗係以直流500v之條件下測定1分値者，絕緣破壞 電壓係以50Hz、2kV/5分之階段昇壓下進行測定者。 本發明之輸電電纜構件係利用該高介電率橡膠組成物 MX，特別是高介電率橡膠基材M22所構成者。亦即，使手 卷用基材或成型用基材之未硫化橡膠材料MX1，或其半導電 橡膠基材M42、M52相互漸次或一體成型品伴隨輸電電纜之 連接等終端處理時，於電極絕緣，應力濾錐作用、界面形成 -16- (12) 1242576 等目的下，做成1mm〜5mm或更厚之厚度電界緩和層配設之 〇 此輸電電纜構件具比介電率10以上、15以上或20以上 之高介電率，且，無降低介電正切’絕緣破壞電壓、絕緣 抵抗等電氣特性。 因此，輸電電纜之終端處理時即使產生突起、異物、 點等特異點，仍可使其周圍電場錐度以該電纜構件有效緩和 之，防止放電等不當之產生。爲此輸電電纜之連接作業無須 高度熟化、作業不煩雜。 圖3代表本發明1實施形態之含絕緣構件之輸電電纜連接 構造CN1。 此連接構造CN1係電氣連接左右輸電電纜PCI、PC2剝出 之導體蕊2.2間之蕊線連接部1 0與電氣連接輸電電纜PC 1、 PC2剝出：遮掩濾網6.6間之遮掩連接部SH以及塡充於此等蕊 線連接部10及遮掩連接部SH間之輸電電纜PC 1、PC2剝出之 絕緣用交聯塑料絕緣體5，5進行形狀整合之絕緣連接部14以 及呈水密嵌入輸電電纜PC 1，PC2之外被覆7，7後被覆遮掩 連接部SH之外圍的2個鑲嵌模保護體15所構成者。 該蕊線連接部10係嵌入各導體蕊2，2端部之筒狀導體8 與卷曲此筒狀導體8及各導體蕊2，2殘餘部位之導電性膠帶 之卷層9以及位於該絕緣連接部14之內環中央部膠帶卷層9及 各電纜絕緣體5，5端部呈形狀整合之輕薄圓筒狀橡膠電極11 所構成者。 遮掩連接部SH係電氣連接於位置絕緣連接部14內環左 -17- (13) 1242576 右端部之遮掩濾網6之輕薄圓筒狀之橡膠電極1 2，1 3與於作 業現場卷曲絕緣連接部14總外圍之半導電膠帶或鋁箔卷層所 成之外部電極EPo所構成者。 絕緣連接部14係於橡膠電極11，12，13外圍使膠帶卷曲 至所定絕緣厚度後形成之。因此，兩端面做成傾斜筒狀之橡 膠絕緣部形成後，嵌入電纜絕緣體5後，使橡膠電極11，1 2 ，13進行絕緣。此橡膠絕緣部亦可於模具塡入橡膠後進行成 型者。 該橡膠電極11，12，Π係由沿絕緣連接部14內環延續後 隔離筒狀橡膠電極層RE1所成，各橡膠電極層RE1係由薄片 狀半導電橡膠層SCI與此半導電橡膠層SCI總外環側或電極 端緣曲率形成部周邊形成模型之高介電率橡膠層HP1所成者 〇 將半導電橡膠層SCI側邊部往高介電率橡膠層HP1內貫 入或延入亦可，此時使半導電橡膠層SCI之貫入長度或延入 長度做成l〇mm以下者。且，高介電率橡膠層之軸方向殘餘 寬度至少爲5mm以上者，藉由電場解析後，使電場集中度不 超過臨界値之長度者。 又，以乙烯或具有與此相同特性之熱收縮管使遮掩連接 部SH呈水密被覆之結構，或以具玻璃纖維之環氧基製泵被 覆後，於此泵與遮掩連接部SH間塡入混合物後呈水密結構 者亦適於取代該保護體15之使用。 另外，於高介電率橡膠層中具有電纜絕緣體比介電率 (ε c)之5倍以上比介電率（ε h)後，可使該電場集中之控 -18- (14) 1242576 制可達實務水準之效果，如：6 c = 2.3時’ ε h爲15則可有效降 低預模型連接構件之厚度。 圖4代表本發明另一實施形態之含絕緣構件輸電電纜之 連接構造CN2者。此連接構造CN2係使高介電率橡膠層HP層 合於薄片狀半導電橡膠層SC外圍後所構成之橡膠電極層RE 介裝於蕊線連接部之膠帶卷層9與絕緣連接部橡膠層EPR之 間，延至電纜絕緣體5外圍者，因此，半導電橡膠層SC端部 SCa可以極小半徑r處理之。 圖5代表本發明另一實施形態之含絕緣構件輸電電纜之 連接構造CN3者。此連接構造CN3係使高介電率橡膠層HP層 合於薄片狀半導電橡膠層SC之外圍所構成之橡膠電極層re 介裝於遮掩濾網6與絕緣連接部之橡膠層EPR間延至電絕絕 緣體5外圍者，因此，與該蕊線連接部時相同，其半導電橡 膠層S C之端部S Ca端面可以極小半徑r進行端末處理。半導 電橡膠製外部電極SCo之厚度亦極小。 中咼電力用之CV電纜中，該端末處理半徑r =〇.5 mm以 上者宜。 上述之絕緣連接部1 4絕緣橡膠材料與遮掩連接部s η半 導電橡膠層RE1、RE之橡膠材料與高介電率橡膠層HP1、Ηρ 之橡膠材料（圖1之M10,)係指其基材聚合物（Μ〇1ι)及對 應之添加物（M12u)爲相等者宜。 〔發明效果〕 如以上說明，本發明高介電率橡膠組成物具有比介電 -19- (15) 1242576 率爲10以上、I5以上或20以上之高介電率，且，無降低介 電正切、絕緣破壞電壓、絕緣抵抗等之電氣特性，可發揮 良好緩和電場效果者。 又，本發明輸電電纜構件即使於電纜終端極處理時產 生突起、異物、點等特異點，仍可緩和其周圍電場，可防 止放電等不適者。又，其作業上無須高度熟練者。 【圖式簡單說明】 [圖1] 代表本發明實施形態之生成高介電率橡膠組成物步驟 及輸電電纜匣式電極層製造步驟之圖者。 [圖2 ] 代表錯由圖1步驟所生成之局介電率橡膠組成物的試驗 結果整理表者。 [圖3 ] 代表本發明實施形態之含有電極層輸電電纜連接構造之 截面圖者。 [圖4 ] 代表本發明另一實施形態之含有電極層輸電電纜連接構 造之截面圖者。 [圖5] 代表本發明另一貫施形態之含有電極層輸電電纜連接構 造之截面圖者。 -20- (16) 1242576 [符號說明] BT1 ，BT2，BT3，BT4，BT5 CN1 ，CN2，CN3 連接構造 HP， HP1 高介電率橡膠層 M01 橡膠系聚合物之基材 M02 氧化鈦 M03 碳酸鋇 M10 基材 Mil 塡充材 M12 添加劑 M13 硫化劑 M22 高介電率橡膠基材 M42 、M52 半導電橡膠基材 Ma 轉移劑 Mb 結合材料 Me 脫離子水 MF 匣式電極層製造步驟 MF1 逐次成型步驟 MF2 一體成型步驟 MX 高介電率橡膠組成物 MX1 未硫化橡膠材料 MX2 硫化橡膠材料 MX3 熱處堙橡膠材料 PCI 、PC2 輸電電纜 鈦酸鋇系之材料 -21 - (17) (17)1242576 PR 高介電率橡膠組成物生成步驟 PR1 基材之準備步驟 PR2 塡充材之準備步驟 PR3 未硫化橡膠材料生成步驟 PR4 硫化處理 PR5 熱處理 RE 電極層 508 位移步驟 509 洗淨步驟 S 1 0 高溫混練步驟 S 11 低溫混練步驟 S20，S30 成型步驟 S21，S31 加熱步驟 SC，SCI 半導電橡膠層 2 導體蕊 5 電纜絕緣體 6 遮掩過濾網 7 外被覆 8 筒狀導體 9 導電性膠帶之卷層 10 蕊線連接部 11 橡膠電極 12 橡膠電極 13 橡膠電極 -22- 1242576 (18) 14 絕緣連接部 15 保護體 -231242576 ⑴ 玖, description of the invention [Technical field to which the invention belongs] The present invention relates to a rubber composition and a transmission cable member having a high dielectric constant. [Previous technology] CV cables that are widely used as transmission cables are connected or terminated in the connection part such as: internal electrode processing part, external semi-conductive layer processing part, stress filter starting part, or cable core and connection The interface part of the parts takes insulation as a necessary measure, and the insulation layer is formed by operations such as rubber model installation, tape winding, and epoxy injection. However, it is less manual operation by manual operators. The insulation layer formed at its interface can easily be accompanied by singularities such as tiny protrusions, foreign objects, and dots with very large discontinuities. The electrical boundary in the insulation layer near this singularity is tapered. To prevent insulation damage, be careful And a high degree of expertise, resulting in a significant increase in construction time and cost. At this point, the taper of the electric field can be reduced by increasing the dielectric constant of the insulating material. After the conductive material such as carbon black is advanced, the dielectric composition of the rubber composition, acrylic rubber, or fluorine rubber can be increased. The rate of rubber composition for insulation materials is discussed. However, after the conductive material is charged, a chain of conductive particles is formed, and the polymer of the high-dielectric rubber has a large polarity and a small dielectric tangent, which causes the insulation breakdown voltage or insulation resistance to decrease. Problem. Therefore, try to fill the rubber composition with barium titanate or titanium oxide-6-(2) 1242576 and other materials with higher specific permittivity, but at this time, only increase the charge of the material 'When the dielectric constant of the rubber composition is increased, a problem that the insulation properties are greatly reduced arises. [Summary of the Invention] In view of the above, the present invention is to provide a high-dielectric-ratio rubber composition and a transmission cable member that do not significantly reduce insulation properties even at high dielectric constants. This problem is solved by the present invention described in applications 1 to 6. The invention of claim 1 is prepared by using a step of preparing a base material made of a rubber-based polymer and a temperature range from room temperature to 90 ° C, and preparing a powder made of barium titanate-based material having a specific permittivity of 2,000 or more. The step of filling the material and the step of filling the filling material on the substrate to generate a high-dielectric-ratio rubber composition having a dielectric constant of 10 or more are characterized by a high dielectric constant. Rubber composition. The invention of application item 2 is the high-dielectric-ratio rubber composition of application item 1, and is characterized in that the specific permittivity of the rubber composition is 15 or more. The invention of application item 3 is the high-dielectric-ratio rubber composition of application item 2, and is characterized in that the specific permittivity of the rubber composition is 20 or more. The invention of application item 4 is the high-dielectric-ratio rubber composition of application item 1, and is characterized in that the step of preparing the filling material is performed by adding a transfer agent to the Curie temperature of the barium titanate-based material. Steps of displacement and steps of removing ionic impurities after washing the barium titanate-based material with deionized water (3) 1242576 The invention of claim 5 is a high-dielectric-ratio rubber composition of claim 1 'It is characterized in that the process further includes a step of crosslinking the rubber-based polymer in the rubber composition by a peroxide, and removing the decomposition residue of the peroxide produced after the heat treatment of the rubber composition by the crosslinking. Stepper. The invention of claim 6 is characterized in that it is a transmission cable member made of the high-permittivity rubber composition according to any one of claims 1 to 5. [Embodiment] Hereinafter, the embodiment of the present invention will be described in detail. FIG. 1 represents the generation steps of a group of high-permittivity (specific permittivity 10 or more) rubber composition MX and a part of the manufacturing steps of a transmission cable cassette electrode layer RE including pR in this embodiment, which represents the embodiment of the present invention. MF person. The composition of the high-permittivity rubber composition in this example] VIX is a high-permittivity rubber material MXl (hereinafter also referred to as "unvulcanized rubber material") in an unvulcanized state described later and a high-permittivity vulcanized rubber material before heat treatment μ X 2 (hereinafter also referred to as "vulcanized rubber material") and the high dielectric constant vulcanized rubber material MX3 (hereinafter also referred to as "heat-treated rubber material") after heat treatment. Also, the cassette electrode layer RE of this embodiment has the same configuration and shape as the combination of the internal semiconductive rubber layer SC and the high-dielectric-constant rubber layer HP shown in the embodiment described later. In the following description, even when the same high dielectric constant is used, it is different from the name when it is regarded as the chemical composition MX and when it is regarded as the electrode layer RE $. The production step PR of the high-permittivity rubber composition MX is a step (4) 1242576 PR1 of preparing the base material M10 of the rubber composition MX ({M10 ,: j = 1 ~ $ (natural number)) and preparing the charge Filling material Ml 1 of the substrate M10 with the step PR2 of {M1 U: k = l ~ k (natural number)}, and adding an additive to the substrate M10 to 12 = 丨% 12 ". ^ 11 = 1 ~ 1 ^ (natural number), m = l ~ M (natural number)} After filling the filling material 11, add a vulcanizing agent-13 = 丨 1 ^ 1311 = 1 ~? (Natural number)} The step PR3 of generating the unvulcanized rubber material MX1 and the heat treatment PR5 of the heat-treated rubber material MX3 after adding the unvulcanized rubber material MX1. In addition, the manufacturing step MF of the electrode layer RE One of the forms of the vulcanized rubber material MX1, the high dielectric constant rubber substrate M22 is used to form the high dielectric constant rubber layer HP of the molding material, and a separately prepared semiconductive rubber substrate MS0 is used to form the semiconductive rubber layer of the molding material. The forming step MF1 of the SC is performed simultaneously with the forming of the high-k dielectric rubber layer HP and the forming of the semiconducting rubber layer SC simultaneously. Therefore, the progressive molding step MF1 and the integral molding step MF2 both include the sulfurization treatment PR4 and the heat treatment PR5 of the rubber composition generation step PR. When preparing step PR1 of the substrate M10, it is selected from a substrate m01 in which a group of rubber-based polymer substrates M01 = {M01i: i = 1 to I (natural number), (i = 1 in this embodiment) As the selection step S 00 of the substrate M 10, and the mixing step S 01 of the substrate M 10 obtained after mixing two or more substrates M 01 is included. This rubber-based polymer substrate MO 1 is a non-crosslinked rubber system such as an ethylene propylene rubber polymer (i = 1), a silicone rubber polymer (i = 2), and a butyl rubber polymer (i = 3). The polymer is treated in a spiral, block, granular, or powdered substrate. The step PR2 of preparing the filling material M 11 contains a titanium oxide base material M02 obtained by dissolving titanium oxide crystal powder (5) 1242576 in a barium carbonate base material M03 aqueous solution made of barium carbonate crystal powder, and obtains a dielectric. The dissolution step S 0 4 of the barium titanate crystal with a high rate, and the material b τ 1 obtained from the barium titanate crystal obtained in this step S 0 4 is added into a zirconium series (that is, a constituent element of SrTiOs). That is, after the transfer agent Ma such as the constituent elements of ZrT103), the change in the Curie temperature (up to about 120t) of the barium titanate crystals from ferroelectric to normal dielectric changes. Displacement step S08 of industrial-grade high-dielectric barium titanate-based material BT2 whose electric capacity is shifted to near room temperature, and material BT1 formed by barium titanate crystals obtained in the dissolution step s04, or the displacement step s 〇 After the obtained barium titanate-based material BT2 was filled with powder, the powder filling step S 0 5 of the filling material Mllk (] < = 1 or k = 2, which is the latter in this embodiment) was obtained. In addition, after the powdering step S 0 5, the powder of the obtained barium cinnamate-based material BT1 and BT2 is further solidified and formed by the bonding material Mb, and the calcination step S06 and the calcined material obtained from the calcination step S06 are further processed. After pulverization, it is preferable to obtain the process of pulverization step S07 by using the powder of barium acetate-based materials BT 3 and BT 4 as the filling material μ 11 k (k = 3 or k = 4) after pulverization. In addition, the powder of barium titanate-based material BT4 obtained in this pulverization step S07 was washed with deionized water MC, and after removing ionic impurities, the powder of barium titanate-based material BT5 was used as the filling material M1U (k = 5 [= K]) The process of obtaining the washing step S09 is better, and this embodiment is in this way. The step PR3 for generating the unvulcanized rubber material MX 1 contains the required amount of the base material M10 prepared in step PR 1 (this is 100 parts by weight; the same applies hereinafter). The filling material M 1 1 prepared in step PR 2 is added to Appropriate amount (different depending on the dielectric constant of the filling material M 1 1 and the expected characteristics of the rubber composition MX), and the actual -10- (6) 1242576 in the example is 300 to 750 parts by weight) After adding the additive M12 and kneading at a higher temperature, the high temperature kneading step S10 to generate the vulcanizing agent without adding the vulcanizing rubber material M20 and adding the vulcanizing agent M 1 3 to the kneaded rubber material M20, The low temperature mixing step S 1 1 of the unvulcanized mixed rubber material M2 1 after kneading at a lower temperature, and filtering the mixed rubber material M2 1 with a predetermined mesh screen to remove the foreign matter and obtain the unvulcanized state. Filtration step of high dielectric rubber substrate M22. The additive M12 = {M12n.m 丨 includes additives for adjusting the mechanical properties of the high-dielectric rubber substrate M22 (n = 1), additives for adjusting the electrical properties (n = 2), and additives for adjusting the chemical properties. For additives (n = 3), the type and blending amount of the additives are determined according to the expected characteristics of the rubber substrate M22. Additives for adjusting mechanical properties {M12Km 丨 contain softeners (such as engineering oils such as Sanper oil [trade name]) M12H, reinforcing agents (such as inorganic materials such as clay) Μ 1 2! · 2, lubricants (such as: Rockwell, stearic acid) M 1 2! .3, Tensile properties improver (such as aerozil [brand name] silica or white carbon black) M 1 2 i _4, additives for adjusting electrical properties {M122. m} contains stabilizers (such as: Red Dan paste for dielectric tangent improvement) Ml 22 | 1, additives for adjusting chemical properties {Ml29.m} * contains anti-aging agents (such as: n0CUk [trade name], etc.) Antioxidants) M129.i. The vulcanizing agent {M13p 丨 contains a peroxide crosslinking agent M 1 3 i such as DCP (dicumylperoxide) and sulfur yellow M 1 3 2. In the manufacturing step MF, the progressive molding step MF 1 and the integral molding step MF 2 both roll the high-k dielectric rubber substrate M22 and cut out a predetermined size to manufacture a high-k dielectric rubber sheet M2 3 Rubber sheet manufacturing steps -11-(7) 1242576 Step S 1 3, and parallel to this S 1 3, respectively, semi-conductive rubber substrates M42 and M52 with desired characteristics are rolled and cut to a predetermined size. The manufacturing steps S43 and S53 of the semi-conductive rubber sheets M43 and M53 are started. The gradual molding step MF1 is a molding step S20 including a high-permittivity rubber sheet M23 installed in a mold of the high-permittivity rubber layer HP, and then heated and vulcanized at a high temperature to produce a high-permittivity rubber molded product M30. After heat-treating the high-permittivity rubber molded product M30 at a temperature, the decomposition residues of the peroxide cross-linking agent M13 after vulcanization are removed, and the rubber-formed molded product M30 is further dried to obtain a heat-treated high-permittivity rubber molded product M3. 1 (that is, the high-dielectric-constant rubber layer HP) heating step S21, and then the rubber molded product M31 and the semi-conductive rubber sheet M43 are installed in a mold of the semi-conductive rubber layer SC, and then heat-molded to manufacture a high-dielectric The forming step S44 of the combination M45 (ie, the rubber electrode layer RE) of the combination of the permittivity rubber layer HP and the semi-conductive rubber molded product M44 (ie, the conductive rubber layer SC). Integral molding step MF2 is a high-permittivity rubber sheet M60 (corresponding to M30) containing the high-permittivity rubber sheet M23 and semi-conductive rubber sheet M53 in the mold of the rubber electrode layer RE, and then vulcanized after heating at a high temperature. M60 is an integrated semi-conductive rubber molded product M62 (ie, semi-conductive rubber layer SC). The molding step S30 of the rubber electrode layer molded product M64 combined with each other, and after heating the rubber molded product M64 at an appropriate temperature, the rubber molded product M64 Partially remove the decomposition residues of the peroxide crosslinking agent M1 3 after vulcanization, and after drying the rubber molded product M64, manufacture the heat-treated high-permittivity rubber molded product M61 (that is, the high-permittivity rubber layer HP) and do The heating step S31 of the electrode layer molded product M65 (that is, the rubber electrode layer RE) formed by combining the semiconductive -12- (8) 1242576 rubber molded product M62 of the semiconductive rubber layer sc. The vulcanization treatment of the unvulcanized rubber material in the step of generating the high-permittivity rubber composition includes the molding steps S20 and S30 of the manufacturing step MF, and the heat treatment of the vulcanized rubber material in the generating step PR 堙 PR5 is the manufacturing step of the inner packaging. The heating steps S 2 1 and S 3 1 of MF. The heating steps S 2 1 and S 3 1 are heated in dry air or, if necessary, in an inert gas such as nitrogen, for 6 to 24 hours at 100 to 140 ° C. Above, the rubber compositions M20 to M23 are contained in the unvulcanized rubber material MX1, the rubber compositions M30 and M60 are contained in the vulcanized rubber material MX2, and the rubber compositions M31 and M61 are contained in the heat-treated rubber material MX3. The high-dielectric rubber sheet M23 is cut with a predetermined width and length, and with appropriate adhesiveness, it is also possible to manufacture rubber spirals or tapes for hand-rolled insulation, or use the high-dielectric rubber substrate M22 to make a gel. Semi-conductive rubber substrates M42 and M52 can also be used. The substrate M10 can also be added with additives M12 and vulcanizing agent M13, and then filled with carbon black. Transmission cable members are made of a high-permittivity rubber composition after cross-linking a peroxide polymer such as dicumyl peroxide, considering mechanical properties such as tensile strength, elongation, and permanent compressive deformation, processability, and price. It is preferable to use a peroxide-crosslinked ethylene propylene rubber (EPDM). The filling material M 1 1 is in a temperature range from room temperature (about 25 ° C) to 90 ° C of the operating temperature range of the power transmission cable, and its specific permittivity is more than 2,000, more preferably 2, 10,000 to 20,000, barium titanate-based materials with a particle size of 1 to 10 μm-13-1242576 0) are preferred. When the specific permittivity of the rhenium filling material Mil is less than 2,000, compared to those with 2,000 or more, the rhenium charge for the substrate M 10 is increased to obtain the dielectric tangent (tan 5) Electrical properties such as insulation breakdown voltage (BDV) and insulation resistance (p) are reduced. Barium titanate-based materials can be produced in various grades, and materials of industrial grades BT2, BT4, and BT5 that increase the dielectric constant after adding a transfer agent such as a samarium-based or pin-based materials are preferred. Among these industrial grade materials BT2, BT4, and BT5, BT2 and BT4 without washing step S09 contain ionic impurities. This ionic impurity reduces the electrical characteristics of the low-frequency range (tan 5 'BDV p) used in commercial MX transmission cables with high dielectric constant rubber composition MX transmission cables. Therefore, the powder M1U (k = 5) of the barium titanate-based material BT5 produced in the washing step S09 after removing the ionic impurities by the deionized water M d is suitable for filling the material. In the cleaning step S09, it is preferable to subject the substrate in the deionized water to ultrasonic cleaning. The filling amount of the filling material Mil is 300 parts by weight or more (preferably 400 parts by weight or more), 400 parts by weight (preferably 500 parts by weight or more), or 500 parts by weight of 100 parts by weight of the substrate M10. After the amount is more than 600 parts (preferably 600 parts by weight or more), the specific permittivity of the high-k dielectric rubber composition MX can be 10 or more, 15 or more, or 20 or more. When the filling amount of the filling material Mil is less than 300 parts by weight, the dielectric constant of the rubber composition MX will be insufficient. Conversely, when the filling amount of the filling material Mil exceeds 400 parts by weight, especially when it exceeds 500 parts by weight -14- (10) 1242576, it is necessary to consider reducing the dielectric tangent of the rubber composition MX, the dielectric breakdown voltage, Insulation characteristics and balance of insulation resistance etc. At this point, the inventors have confirmed through experiments that the composition X of peroxide crosslinking contains a large amount of industrial grade barium titanate-based materials BT2 and BT4. The decrease in insulation characteristics is due to the ions attached to the materials BT2 and BT4. After the conductive impurities are conductive, the ionic impurities and the crosslinked rubber composition MX are also caused by the decomposition residues of the remaining cross-linking agent M 1 3 (such as residuals after cross-linking dicumyl peroxide). (Acetophenone and cumyl alcohol) interact with each other to produce interface polarization. In order to balance the dielectric constant and insulation characteristics of the high-dielectric rubber composition MX, the powder M1U (k = 5) of the barium titanate-based material BT5, which removes ionic impurities by the cleaning step S09, is used as 塡The user of the charging material can improve the dielectric constant of the rubber composition MX, and it is more preferable to remove the decomposition residue of the crosslinking agent by the heating steps S2i and S31. Figure 2 represents a specific example of a high-dielectric rubber composition MX using ethylene propylene rubber polymer MO1 (i = i) as a base, No. 1 to N0.7, and a list of test results of its electrical characteristics (Table 1). The high-dielectric-rate rubber composition examples NO_1 to NO.7 are added to 100 parts by weight of the substrate M 1 01, and additives containing engineering oil and antioxidants are added] y [12 and 4 parts by weight of peroxide After diisolactone (crosslinking agent) Ml 3, powder M 1 of any barium titanate-based material (A, B, C) of 3 (A, B, C) shown below is charged with 3,000 parts by weight (NO. 3), 450 parts by weight (NO.2), 500 parts by weight (NO.4), 650 parts by weight (NO.1), or 750 parts by weight (1 ^ 0.5 to 0.7) are formed. Powder A: Β335 (trade name) manufactured by Fuji Titanium Industries, -15- (11) 1242576 Specific permittivity 1600 (room temperature to 90 ° C) Powder B: BT325 (trade name) manufactured by Fuji Titanium Industries, specific permittivity 4000 (room temperature to 90 ° C) powder C: BT206 (trade name) manufactured by Fuji Titanium Industrial, specific permittivity 1 6500 (room temperature) 3 000 (90 ° C) high-dielectric constant rubber composition such as NO. In 6 and N0.7, the decomposition residues of the cross-linking agent M13 are removed by heating steps S21 and S31 (120 ° C, 12 hours). Furthermore, in the high-dielectric-constant rubber composition example N0.7, the filling material Mil (powder C) was washed in the washing step of deionized water Md, and then dried. In each example, N0.1 to N0.7 were used to form the uncured rubber material MX1 in the production step PR3. The obtained high dielectric constant rubber substrate M22 was formed into a flat sheet shape with a thickness of 2 mm, and the sample was formed after vulcanization. Permittivity, dielectric tangent and insulation resistance. A sheet-shaped sample with a recessed portion having an effective portion thickness of 0.5 mm was prepared, and the dielectric breakdown voltage was measured. The dielectric constant and the dielectric tangent are measured under the conditions of 50Hz and 1Kv, the insulation resistance is measured under the condition of DC 500v for 1 minute, and the dielectric breakdown voltage is increased under the step of 50Hz and 2kV / 5 minutes. Tester. The power transmission cable member of the present invention is constituted by using the high-k dielectric rubber composition MX, particularly the high-k dielectric rubber substrate M22. That is, when the uncured rubber material MX1 of the base material for hand-rolling or the base material for molding or the semi-conductive rubber base materials M42 and M52 are gradually or integrally formed with each other, and the terminal cables are connected with the power transmission cable, the electrodes are insulated and stressed Filter cone effect, interface formation -16- (12) 1242576, and other purposes, the thickness of 1mm ~ 5mm or thicker electrical field relaxation layer is provided. This transmission cable member has a specific permittivity of 10 or more, 15 or 20 The above high dielectric rate, and without reducing the dielectric tangent 'insulation breakdown voltage, insulation resistance and other electrical characteristics. Therefore, even if special points such as protrusions, foreign objects, and dots are generated during the terminal treatment of the transmission cable, the taper of the surrounding electric field can be effectively mitigated by the cable member to prevent improper discharge and the like. For this reason, the connection operation of the transmission cable does not need to be highly matured and the operation is not complicated. Fig. 3 shows a connection structure CN1 of a power transmission cable including an insulating member according to the first embodiment of the present invention. This connection structure CN1 is an electrical connection between the left and right transmission cables PCI and PC2, and the core connection section 10 between the conductor cores 2.2 is peeled off from the electrical connection transmission cables PC 1, PC2: the shield connection section SH between the shields 6.6 and塡 The power transmission cable PC 1 filled between these core wire connection portions 10 and the cover connection portion SH, and the insulated cross-linked plastic insulators 5 and 5 of the insulation stripped from the PC 2 and the water-tight embedded power transmission cable PC. 1. The outer surface of PC2 is covered with 7, and the rear surface is covered with two mosaic mold protectors 15 covering the periphery of the connection portion SH. The core wire connecting portion 10 is a cylindrical conductor 8 embedded in the ends of each of the conductor cores 2 and 2 and a coil layer 9 of a conductive tape curling the cylindrical conductor 8 and the remaining portions of the conductor cores 2 and 2 and the insulation connection. The inner ring central portion of the portion 14 is formed of a tape roll layer 9 and each of the cable insulators 5 and 5 ends are formed by a light and thin cylindrical rubber electrode 11 integrated in shape. The shield connection part SH is electrically connected to the position of the insulation connection part 14. Inner ring left -17- (13) 1242576 The light-shielded cylindrical rubber electrode 1 at the right end of the shield filter 6 is connected to the coil at the work site. The outer electrode EPo formed by a semi-conductive tape or an aluminum foil roll layer on the entire periphery of the portion 14 is composed of. The insulation connection portion 14 is formed around the rubber electrodes 11, 12, 13 by curling the tape to a predetermined insulation thickness. Therefore, after the rubber insulation portions having the inclined cylindrical shape at both end surfaces are formed, the rubber insulators 11, 12 and 13 are insulated after being embedded in the cable insulator 5. This rubber insulating portion can also be formed after the mold is inserted into the rubber. The rubber electrodes 11, 12, and Π are formed by separating the cylindrical rubber electrode layer RE1 after continuing along the inner ring of the insulating connection portion 14. Each of the rubber electrode layers RE1 is composed of a sheet-shaped semiconductive rubber layer SCI and a semiconductive rubber layer SCI. Formed by the high-dielectric-constant rubber layer HP1 that forms a model around the curvature portion of the total outer ring side or the electrode edge. It is also possible to insert or extend the SCI side of the semiconductive rubber layer into the high-dielectric-constant rubber layer HP1. At this time, the penetration length or extension length of the semiconducting rubber layer SCI is made less than 10 mm. In addition, the axial width of the high-permittivity rubber layer is at least 5 mm, and after the electric field analysis, the electric field concentration does not exceed the critical length. In addition, the covering connection portion SH is watertightly covered with ethylene or a heat-shrinkable tube having the same characteristics, or is covered with an epoxy-based pump made of glass fiber. Those having a watertight structure after the mixture are also suitable for replacing the protective body 15. In addition, when the specific dielectric constant (ε h) of the cable insulator in the high dielectric constant rubber layer is 5 times or more, the electric field concentration can be controlled by -18- (14) 1242576. It can reach the practical effect. For example, when 6 c = 2.3, 'ε h is 15 which can effectively reduce the thickness of the pre-model connection members. Fig. 4 shows a connection structure CN2 of a transmission cable including an insulating member according to another embodiment of the present invention. This connection structure CN2 is a rubber electrode layer RE formed by laminating a high-permittivity rubber layer HP on the periphery of a sheet-shaped semi-conductive rubber layer SC. The tape roll layer 9 is inserted between the core wire connection portion and the insulation connection portion rubber layer. Between EPR, it extends to the periphery of the cable insulator 5, so the semiconductive rubber layer SC end portion SCa can be treated with a very small radius r. Fig. 5 shows a connection structure CN3 of a transmission cable including an insulating member according to another embodiment of the present invention. This connection structure CN3 is a rubber electrode layer composed of a high dielectric rubber layer HP laminated on the periphery of the thin-film semiconductive rubber layer SC. The rubber electrode layer re is interposed between the shielding screen 6 and the rubber layer EPR of the insulating connection portion to be electrically extended. As for the outer periphery of the insulator 5, the end surface of the end S Ca of the semiconductive rubber layer SC can be subjected to end treatment with a small radius r as in the case of the core wire connection portion. The thickness of the semiconductive rubber external electrode SCo is also extremely small. In CV cables for Zhongli Power, the terminal processing radius r = 0.5 mm or more is preferred. The above-mentioned insulating connecting portion 14 includes an insulating rubber material and a covering connecting portion s. The semi-conductive rubber layer RE1, the rubber material of RE, and the high-dielectric-constant rubber layer HP1, and the rubber material of HP1, Ηρ refer to its base. The polymer (MOI) and the corresponding additive (M12u) should be equal. [Effects of the Invention] As described above, the high-dielectric-constant rubber composition of the present invention has a high dielectric constant of a specific dielectric of -19- (15) 1242576 with a rate of 10 or more, I5 or more, or 20 or more, and the dielectric is not reduced. Electrical characteristics such as tangent, insulation breakdown voltage, and insulation resistance can exert a good effect of mitigating electric fields. Furthermore, even if the transmission cable member of the present invention generates specific points such as protrusions, foreign objects, and dots during the processing of the cable terminal, it can still relax the electric field around it and prevent discomfort such as discharge. Moreover, it is not necessary to be highly skilled in its operation. [Brief description of the drawings] [Fig. 1] A figure representing the steps of producing a high-permittivity rubber composition and the manufacturing steps of a transmission cable cassette electrode layer according to an embodiment of the present invention. [Fig. 2] The representative of the test results of the local dielectric rubber composition produced by the steps in Fig. 1 is arranged for the table. [Fig. 3] A cross-sectional view showing a connection structure of a transmission cable including an electrode layer according to an embodiment of the present invention. [Fig. 4] A cross-sectional view showing a connection structure of a transmission cable including an electrode layer according to another embodiment of the present invention. [Fig. 5] A cross-sectional view showing a connection structure of a transmission cable including an electrode layer according to another embodiment of the present invention. -20- (16) 1242576 [Symbols] BT1, BT2, BT3, BT4, BT5 CN1, CN2, CN3 Connection structure HP, HP1 High-permittivity rubber layer M01 Base material of rubber-based polymer M02 Titanium oxide M03 Barium carbonate M10 Base material Mil 塡 Filler M12 Additive M13 Vulcanizing agent M22 High dielectric rubber base material M42, M52 Semi-conductive rubber base material Ma Transfer agent Mb Bonding material Me Deionized water MF Cassette electrode layer manufacturing step MF1 Successive molding step MF2 Integrated molding step MX high-permittivity rubber composition MX1 unvulcanized rubber material MX2 vulcanized rubber material MX3 heat treatment rubber material PCI, PC2 power transmission cable barium titanate-based material-21-(17) (17) 1242576 PR high permittivity Rubber composition generation step PR1 Base material preparation step PR2 Filling material preparation step PR3 Unvulcanized rubber material generation step PR4 Vulcanization treatment PR5 Heat treatment RE Electrode layer 508 Displacement step 509 Washing step S 1 0 High temperature kneading step S 11 Low temperature kneading step S20, S30 Molding step S21, S31 Heating step SC, SCI Semi-conductive rubber layer 2 Conductor core 5 Cable insulator 6 Masking and filtering Core wire 10 of conductive tape 9 7 8 covering the outer cylindrical coil conductor layers 12 connected to electrode portions 11 Rubber Rubber Rubber electrode 13 -22-1242576 electrode (18) connected to the insulating portion 14 -23 15 protector