200832450 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種可撓性扁平電纜，其係藉由絕緣被 覆材料以整體絕緣被覆成形的方式，被覆並列配置的複數 條方形導體而形成，更詳言之，關於一種可撓性扁平電纜， 其係使用不含鹵素系難燃劑之絕緣被覆材料，發揮高度難 燃性’具優越之機械物性、耐熱性、耐熱老化性、加熱變 形承受性、低溫特性（低溫下之可撓性）、電絕緣性等。 【先前技術】 絕緣電線或屏蔽電纜、絕緣電纜等之各種絕緣被覆電 線係藉由絕緣被覆材料以絕緣被覆導體。於絕緣被覆電線 中，除了絕緣性之外，一般也要求難燃性。因此，例如可 使用軟質聚氯乙烯樹脂、摻合難燃劑之聚烯烴樹脂組成物 等作爲使用於電子機器之機內配線的絕緣被覆電線之絕緣 被覆材料。 軟質聚氯乙烯樹脂係含有鍵結氯原子，而且含有大量 之可塑劑。於聚烯烴樹脂組成物中所摻合之難燃劑係使用 於分子中含有溴原子或氯原子之鹵素系難燃劑。即使於鹵 素系難燃劑之中，分子中含有溴原子之溴系難燃劑，其難 燃化效果爲高的，一般而言，利用因與氧化銻倂用所造成 之加乘效果而進行難燃化。溴系難燃劑係因與磷化合物倂 用所造成之難燃化效果也爲高的。 | 但是，若藉由含有軟質聚氯乙烯樹脂或鹵素系難燃劑 的聚烯烴樹脂組成物等之絕緣被覆材料，進行所絕緣被覆 200832450 •之電線的焚燒處理的話，擔心從聚氯乙烯樹脂或鹵素系難 燃劑產生腐蝕性氣體或戴奧辛類。再者，將含有可塑劑或 磷化合物之電線堆積於廢棄場期間，擔心此等物質溶出後 而污染環境。 近年來，爲了因應對於環境負荷減低要求之提高，已 開發出一種不含聚氯乙烯樹脂或鹵素系難燃劑之無鹵素電 線。 另一方面，使用於電子機器之機內配線的絕緣電線或 ^ 絕緣電纜等電線中，一般尋求具有適合於UL( Underwriter Laboratories inc·)規格之各種特性。於UL規格中，針對 製品應符合之難燃性、加熱變形性、低溫特性、被覆材料 之初期與受熱老化後之拉伸特性等各種特性已詳細加以規 定。此等各種特性之中，針對難燃性，也必須於所謂VW-1 試驗之垂直燃燒試驗中合格，於UL規格之中，此垂直燃 燒試驗也已成爲最爲嚴格的要求項目之一。 0 例如，使用於聚烯烴樹脂中摻有氫氧化鎂或氫氧化鋁 等之金屬氫氧化物（也稱爲「金屬水合物」）的難燃性樹 脂組成物作爲無鹵素電線之絕緣被覆材料。但是，由於金 屬氫氧化物之難燃化效果較鹵素系難燃劑爲低的，爲了於 UL規格之垂直燃燒試驗中合格，必須將大量之金屬氫氧化 物摻合於聚烯烴樹脂中。其結果，聚烯烴樹脂組成物之拉 伸特性（拉伸強度及拉伸斷裂伸度）或加熱變形承受性等 將顯著降低，變得不適用於作爲絕緣被覆材料。 藉由將加速電子線等電離放射線照射在由聚烯烴樹脂 200832450 中摻有金屬氫氧化物之聚烯烴樹脂組成物而成的絕緣被覆 後而進行交聯，能夠改良拉伸特性或加熱變形承受性。但 是，如該無鹵素之難燃性樹脂組成物，除了較聚氯乙烯樹 脂更爲昂貴之外，由於電離放射線之照射必須具備高價之 照射裝置，將有製造成本進一步增高的缺點。因此，期望 一種無鹵素電線之開發，即使其不進行交聯處理，也符合 UL規格之垂直燃燒試驗。 習知無鹵素之難燃性樹脂組成物係提案一種傳送線被 覆用樹脂組成物（專利文獻1 )，其係將大量金屬水合物 摻合於含有乙烯共聚物與聚酯彈性體的樹脂成分中。乙烯 共聚物可使用醋酸乙烯酯含量爲25〜85質量％之乙烯-醋 酸乙烯酯共聚物。但是，含有於專利文獻1中所揭示之聚 酯彈性體的難燃性樹脂組成物，其難燃性或絕緣電阻未必 足夠，尤其，U L規格的垂直燃燒試驗中之合格率並不高。 有人提案一種難燃性樹脂組成物（專利文獻2 )，其 係於含有乙烯共聚物與具有聚酯型及/或聚醚型鏈段之熱 可塑性樹脂的樹脂成分中，將利用有機過氧化物及矽烷耦 合劑處理過之金屬水合物予以熔融混攪所構成。於專利文 獻2中，具有聚酯型及/或聚醚型鏈段之熱可塑性樹脂，例 如，可列舉：熱可塑性聚酯彈性體、熱可塑性聚胺基甲酸 酯彈性體及熱可塑性聚醯胺彈性體。 然而，使用一種樹脂組成物，其係將金屬水合物熔融 混攪於含有專利文獻2的實施例所用之熱可塑性聚胺基甲 酸酯彈性體（DIC BAYER POLYMER股份公司製之商品名 200832450 「Τ-8 180N」）、與醋酸乙烯酯含量爲41重量％之乙烯-醋 酸乙烯酯共聚物（三井杜邦股份公司製之商品名 「EVAFLEX EV40LX」）之樹脂成分中，以形成具高度均 衡之難燃性、機械物性、耐熱性、耐熱老化性、加熱變形 承受性等之絕緣被覆爲困難的，尤其，得到顯示於U L規 格垂直燃燒試驗中合格之高度難燃性的絕緣被覆電線極爲 困難。 扁平電纜之情形中也具有與上述相同的情況，正謀求 — 改善。即使於扁平電纜中，藉由以絕緣被覆材料整體絕緣 被覆成形的方式，被覆並列配置的複數條方形導體而形成 之扁平電纜，其係一種所謂可撓性扁平電纜（FFC )之帶狀 電纜，適合於電子機械等之中的活動部分或在狹窄場所之 使用。 例如，可使用聚氯乙烯樹脂作爲可撓性扁平電纜之絕 緣被覆材料（專利文獻3 )。除了含有鍵結氯原子之外’ 爲了軟質化氯乙烯樹脂而必須含有大量之軟化劑。實際 上，於專利文獻3中，揭示爲了氯乙烯樹脂之軟質化’含 有大量之可塑劑。如此之軟質聚氯乙烯樹脂，除了 一旦焚 燒時將有發生腐蝕性氣體或戴奧辛類的危險之外’也擔憂 於廢棄後溶出可塑劑。 專利文獻1 :日本專利特開2004· 10840號公報 專利文獻2 :日本專利特開2004-5 1 903號公報 專利文獻3 :日本專利特開平1·276 5 1 4號公報 【發明內容】 200832450 發明所_gl解決之抟丨if問潁 本發明之課題在於提供一種可撓性扁平電纜，其係藉 由絕緣被覆材料以整體絕緣被覆成形，被覆並列配置的複 數條方形導體而形成之可撓性扁平電纜，使用不含鍵結鹵 素原子或鹵素系難燃劑之絕緣被覆材料，且顯示符合UL 規格之高度難燃性，具優越之可撓性、機械物性、耐熱性、 耐熱老化性、加熱變形承受性、低溫特性、電絕緣性等。 本發明之另一課題在於提供一種可撓性扁平電纜，其 具備上述各種特性之同時，能夠容易地分割或分支成含有 所要求之方形導體數的複數條扁平電纜。 再者，本發明之另一課題在於提供一種可撓性扁平電 纜，其具備上述各種特性之同時，能夠整齊重疊或束縛爲 容易之可撓性扁平電纜。 本發明人等爲了解決該課題，鑽硏的結果，發現可以 得到一種難燃性樹脂組成物，相對於以特定比例含有硬度 ^ 於特定範圍內之熱可塑性聚胺基甲酸酯彈性體、與醋酸乙 烯酯單位之含量爲特定範圍內之乙烯-醋酸乙烯酯共聚物 的樹脂成分，藉由含有特定量之氫氧化物，即使不進行因 電離放射線所導致之交聯處理，也顯示於UL規格之垂直 燃燒試驗V W- 1中合格的高度難燃性，能夠形成具優越之 可撓性（柔軟性）、機械物性（拉伸強度及拉伸斷裂伸度）、 耐熱性、耐熱老化性、加熱變形承受性、低溫特性、電絕 緣性等之絕緣被覆。 尤其，一旦將本發明之難燃性樹脂組成物作爲可撓性 -10- 200832450 扁平電纜使用時，顯示於UL規格之垂直燃燒試驗VW-1中 合格的高度難燃性，能夠得到具有優越之可撓性、機械物 性、耐熱性、耐熱老化性、加熱變形承受性、低溫特性、 電絕緣性等之絕緣被覆的可撓性扁平電纜。 使用如此方形導體之可撓性扁平電纜，依需求而整齊 地重疊或束縛爲容易的，尤其能夠作爲在電子機器內部之 多向分岔配線材使用。本發明之可撓性扁平電纜係藉由作 成於相鄰接的方形導體之中間位置，沿著長邊方向在絕緣 ^ 被覆之兩表面設置刻痕的構造，能夠容易地分割或分支成 .含有所要求之方形導體數的複數條可撓性扁平電纜。一旦 具有刻痕時，重疊或束縛可撓性扁平電纜將更爲容易。本 發明係根據此等之見解而完成。 【實施方式】 解決問題之技術羊段 若根據本發明，提供一種可撓性扁平電纜，其係藉由 絕緣被覆材料以整體絕緣被覆成形的方式，被覆並列配置 β 的複數條方形導體而形成之可撓性扁平電纜，其特徵係該 絕緣被覆材料爲含有樹脂成分、及金屬氫氧化物（C )之難 燃性樹脂組成物，其中該樹脂成分係以重量比（A : Β )爲 4 0 : 6 0〜9 0 : 1 0的比例含有依照JI S K 7 3 1 1所測出之J I S 硬度爲A97以下的熱可塑性聚胺基甲酸酯彈性體（A )、 與醋酸乙烯酯單位之含量爲5〇〜90重量％的乙烯-醋酸乙 烯酯共聚物（B )，且該絕緣被覆材料係相對於該樹脂成分 1 0 0重量份，含有4 0〜2 5 0重量份比例的金屬氫氧化物（C )。 200832450 〔發明之效果〕 若根據本發明，提供一種可撓性扁平電纜，即使不進 行因電離放射線所導致之交聯處理，也顯示於UL規格之 垂直燃燒試驗VW-1的高度難燃性中合格，形成具優越之 可撓性、機械物性、耐熱性、耐熱老化性、加熱變形承受 性、低溫特性、電絕緣性等之絕緣被覆（以下，也稱爲「絕 緣被覆層」或簡稱爲「被覆層」）的可撓性扁平電纜。 本發明之可撓性扁平電纜係藉由作成在相鄰接的方形 胃 導體的中間位置，沿著長邊方向在絕緣被覆之兩表面設置 刻痕的構造，能夠容易地分割或分支成含有所要求之方形 導體數的複數條可撓性扁平電纜。 可撓性扁平電纜係由於其帶狀之形狀，有可能阻礙電 子機器內之空氣循環，較宜予以重疊或束縛。若根據本發 明’藉由不僅整齊地重疊或束縛，並設置刻痕構造，也能 夠作爲多向分岔配線材使用。 0 【發明之實施形態】 1 ·可撓性扁平電纜之槪要 例如，本發明之可撓性扁平電纜係具有顯示於第1圖 之剖面構造。具體而言，本發明之可撓性扁平電纜1 〇係並 列配置複數條之方形導體（平板型導體）n、n、n…， 藉由絕緣被覆材料以整體絕緣被覆成形各方形導體之周圍 及各方形導體之間，設置絕緣被覆1 2之帶狀電纜。針對該 可撓性扁平電纜之較佳構造，如後詳加說明。 2 ·絕緣被覆材料 12- 200832450 本發明之最大特徵係在於形成絕緣被覆1 2之絕緣被 覆材料。於本發明使用之絕緣被覆材料爲含有樹脂成分、 及金屬氫氧化物（C )之難燃性樹脂組成物，其中該樹脂成 分係以重量比（A : B )爲4 0 : 6 0〜9 0 : 1 〇的比例含有依 照JIS K 731 1所測出之JIS硬度爲A97以下的熱可塑性聚 胺基甲酸酯彈性體（A )、與醋酸乙烯酯單位之含量爲50 〜90重量％的乙烯-醋酸乙烯酯共聚物（B)，且該絕緣被 覆材料係相對於該樹脂成分1〇〇重量份，含有40〜2 5 0重 量份比例的金屬氫氧化物（C )。 熱可塑性彈性體（TPE )係於分子中含有具彈性的橡膠 成分（軟鏈段）與防止塑性變形之分子限制成分（硬鏈段） 之兩成分的高分子。 於本發明使用的熱可塑性聚胺基甲酸酯彈性體（TPU ) 係根據高分子量二醇（長鏈二醇）、二異氰酸酯及低分子 量二醇（短鏈二醇）之三成分的分子間反應而生成的分子 中具有胺基甲酸酯基（一 NH - COO—）之高分子。長鏈二 醇與短鏈二醇係與二異氰酸酯進行加成反應後而生成線形 聚胺基甲酸酯。此等聚胺基甲酸酯之中，長鏈二醇係形成 彈性體之柔軟部分（軟鏈段），二異氰酸酯與短鏈二醇係 形成硬的部分（硬鏈段）。熱可塑性聚胺基甲酸酯彈性體 之基本特性主要係根據長鏈二醇之種類而加以決定，硬度 係以硬鏈段之比例而加以調整。 例如，長鏈二醇可列舉：聚丙二醇（PPG )、聚丁二 醇（PTMG)、聚（伸丁基己二酸酯）二醇（PBA)、聚-ε - 200832450 己內酯二醇（PCL)、聚（伸己基碳酸酯）二醇（PHC)、 聚（伸乙基/1,4-己二酸酯）二醇、聚（1，6-伸己基/伸新戊 基己二酸酯）二醇等。根據長鏈二醇之種類，例如，熱可 塑性樹脂聚胺基甲酸酯彈性體之種類係被分爲己二酸酯 型、己內酯型、PTMG型、聚碳酸酯（PC )型等。 例如，二異氰酸酯可列舉：4,4’-二苯基甲烷二異氰酸 酯、伸己基二異氰酸酯、異佛酮二異氰酸酯、4,4 5-二環己 基甲烷二異氰酸酯等。例如，短鏈二醇可列舉：1，4-丁二 醇、1，6-己二醇、1，4-雙（2-羥乙氧基）苯等。 於本發明使用的熱可塑性聚胺基甲酸酯彈性體係依照 JIS K 73 1 1 (聚胺基甲酸酯系熱可塑性彈性體之試驗方 法），使用A型硬度計而測出的硬度（單位=JIS ;也稱爲 「JIS A硬度」）爲A97以下。若熱可塑性聚胺基甲酸酯 彈性體之JIS硬度爲98以上的話，由難燃性樹脂組成物所 構成的絕緣被覆之拉伸斷裂伸度將顯著變低，絕緣被覆之 可撓性將受損。於本發明使用的熱可塑性聚胺基甲酸酯彈 性體之JIS硬度較宜爲A50〜A96，更佳爲A60〜A95，尤 以A7 0〜A9 3特別理想。藉由使熱可塑性聚胺基甲酸酯彈 性體之JIS硬度成爲該範圍內，因爲能夠使由難燃性樹脂 組成物所構成的絕緣被覆之機械物性、耐熱性、耐熱老化 性、加熱變形承受性、低溫特性等各種特性予以高度均衡 而較佳。 基於擠出加工性或機械物性等之觀點，成爲於本發明 使用的熱可塑性聚胺基甲酸酯彈性體之分子量指標的熔融 -14- 200832450 流動速率（以下，簡稱爲「MFR」；依照JIS K 7210，溫 度210°C、載重5000g下測定）較宜爲〇·ι〜i〇〇g/10分鐘， 更佳爲0.5〜50g/10分鐘。 於本發明使用的乙烯-醋酸乙烯酯共聚物係醋酸乙烯 酯單位之含量（簡稱爲醋酸乙烯酯含量）爲5 0〜90重量％ 之乙烯與醋酸乙烯酯的共聚物。若乙烯-醋酸乙烯酯共聚物 的醋酸乙烯酯單位之含量過低的話，得到具優越之難燃 性、機械物性、耐熱性、耐熱老化性、加熱變形承受性等 W 之樹脂組成物爲困難的，尤其，無法形成顯示於垂直燃燒 試驗VW- 1中合格之高度難燃性的絕緣被覆。醋酸乙烯酯 單位之含量較宜爲5 5〜8 5重量％、更佳爲6 0〜8 3重量％。 於本發明使用的乙烯-醋酸乙烯酯共聚物係藉由使醋酸乙 烯酯單位之含量成爲該範.圍內，能夠形成由具優越之難燃 性或拉伸特性等之各種特性的難燃性樹脂組成物所構成的 絕緣被覆。 基於擠出加工性或機械物性等之觀點，成爲於本發明 使用的乙烯-醋酸乙烯酯共聚物之分子量指標的MFR(依照 JIS K 7210，溫度190°C、載重2160g下測定）較宜爲0.1 〜1 0 0 g/1 0分鐘，更佳爲0.5〜5 0 g/1 0分鐘。 於本發明中，使用含有熱可塑性聚胺基甲酸酯彈性體 (A成分）與乙烯-醋酸乙烯酯共聚物（B成分），且以二 者之重量比（A: Β)爲40: 60〜9 0: 10之範圍內含有的 樹脂成分。若樹脂成分中之熱可塑性聚胺基甲酸酯彈性體 的重量比率過低的話，難燃性將降低，無法於UL規格之 -15- 200832450 垂直燃燒試驗VW-1中合格。即使樹脂成分中之熱可塑性 聚胺基甲酸酯彈性體的重量比率過高的話，難燃性也將降 低，於UL規格之垂直燃燒試驗VW-1中無法合格。若乙烯 -醋酸乙烯酯共聚物之重量比過低的話，難燃性容易變得降 低；若過高的話，難燃性也容易變得降低，或拉伸斷裂伸 度降低。熱可塑性聚胺基甲酸酯彈性體（A麻分）與乙烯-醋酸乙烯酯共聚物（B成分）的樹脂成分之重量比（A: B) 較宜爲45: 55〜85: 15，更佳爲50: 50〜80: 20。 _ 例如，金屬氫氧化物可列舉：氫氧化鎂及氫氧化鋁。 此等金屬氫氧化物之中，基於具優越之難燃性的觀點，氫 氧化鎂較佳。氫氧化鎂不僅可以使用合成品，也可以使用 以水滑石鑛作爲原料之天然產出的氫氧化鎂（天然氫氧化 鎂），由於能夠形成符合難燃性、拉伸物性、加熱變形性、 低溫特性等UL規格之規定的絕緣被覆，有利於製造成本 之減低。 0 基於相對於樹脂成分的分散性之觀點，期望氫氧化鎂 等之金屬氫氧化物選擇平均粒徑（根據雷射繞射/散射法所 得的等量徑）較宜爲0.3〜7μιη，更佳爲0.5〜5μηι，BET比 表面積較宜爲2〜20m2/g，更佳爲3〜15m2/g範圍內之物。 基於分散性之觀點，金屬氫氧化物能夠使用未進行表 面處理之等級，較宜使用以硬脂酸或油酸等之脂肪酸、磷 酸酯、矽烷系耦合劑、鈦系耦合劑、鋁系耦合劑等之表面 處理劑所表面處理的等級。 相對於樹脂成分1 0 0重量份，金屬氫氧化物之摻合比 -16- 200832450 例爲40〜250重量份，較宜爲50〜240重量份，更佳爲 〜2 0 0重量份。右金屬氣興化物之㉟合比例過低的話，難 燃性將變得不足；若過高的話，基於擠壓成形性之觀點， 由於難燃性樹脂組成物之熔融力矩變高而不佳，拉伸斷裂 伸度也將降低。 於本發明使用的難燃性樹脂組成物中，根據需求而添 加下列物質爲可能的：三氧化銻、錫酸鋅、羥基錫酸鋅、 硼酸鋅、碳酸鋅、鹼性碳酸鎂等之無機系難燃劑或難燃助 劑；三聚氰胺異氰酸酯等之氮系難燃劑；如縮合型鱗酸酯 之磷系難燃劑等。 於本發明使用的難燃性樹脂組成物中，必要時可以添 加下列物質：潤滑劑、抗氧化劑、加工安定劑、水解抑制 劑、重金屬不活化劑、著色劑、塡充劑、補強材料、發泡 劑等之習知摻合藥品。 於本發明使用的難燃性樹脂組成物能夠藉由使用開□ 式輥筒、班伯里（Bumbury )混合機、加壓捏和機、單軸或 多軸混合機等之習知熔融混合機以混合樹脂成分、金屬氫 氧化物、及必要時所添加的其他成分後而加以調製。該難 燃性樹脂組成物能夠形成九粒之形態。 於本發明使用的難燃性樹脂組成物可用於可撓性扁平 電纜之絕緣被覆，此時，即使不進行交聯處理，也能夠形 成具優越之拉伸特性或難燃性等各種特性。 另一方面，期望使用該難燃性樹脂組成物以交聯所形 成的絕緣被覆之情形下，也可以進行交聯處理。具體而言， 200832450 使用該難燃性樹脂組成物以形成可撓性扁平電纜之絕緣被 覆，若照射加速電子線或γ線等之電離放射線的話，能夠 使該絕緣被覆予以交聯。若於該難燃性樹脂組成物中含有 有機過氧化物的話，根據加熱而能夠交聯絕緣被覆。於交 聯處理時，也能夠於難燃性樹脂組成物中預先添加多官能 單體。藉由實施交聯處理，也能夠使拉伸特性或耐熱性等 特性得以改善。 具有由本發明之難燃性樹脂組成物所形成的絕緣被覆 之可撓性扁平電纜係符合於u L規格之物，尤其僅具有於 垂直燃燒試驗vw-1中合格之高度難燃性。此絕緣被覆不 僅具優越之初期拉伸強度及拉伸斷裂伸度，受熱老化後之 拉伸特性也爲良好的。使用拉伸試驗機，於拉伸速度5 0mm/ 分鐘、標線間距離25mm、溫度23 °C下測定時，得到具優 越之拉伸特性的絕緣被覆爲可能的：拉伸強度爲8.2MPa 以上，大多之情形爲10.0〜20.OMPa;拉伸斷裂伸度爲100% 以上，大多之情形爲105〜23 0%。該絕緣被覆係於1 13°C 之齒輪烘箱中，能夠放置1 6 8小時的受熱老化試驗後之拉 伸強度殘率爲75%以上，較宜爲80%以上，並且，拉伸斷 裂伸度爲75%以上，較宜爲80%以上。 具有由本發明之難燃性樹脂組成物所形成的絕緣被覆 之可撓性扁平電纜，其係將各個分割後之試料（含有1個 方形導體之試料）放置於100°C之齒輪烘箱中，預熱60分 鐘之後，利用載重2 5 0 g之外徑9.5111111的圓盤狀夾具，從 該試料上部按壓60分鐘，測定其變形殘率時，能夠顯示加 -18- 200832450 60%以 緣被覆 割後之 中放置 屬棒彎 例中敘 利申請 特徵= 線用電 爲優異 之材質 之鍍錫 f 爲 0.1 方形導 > T)， 之情形 熱變形殘率爲50%以上，較宜爲55%以上，更佳爲 上。 具備由本發明之難燃性樹脂組成物所形成的絕 的可撓性扁平電纜係具優越之低溫特性，將各個分 試料（含有1個方形導體之試料）於-1 0°C之低溫槽 4小時後，於-1 〇 °C，被該試料外徑之2倍直徑的金 曲成U字時，絕緣被覆內並未發生裂紋（裂縫）。 此等各種特性之測定法的詳細內容係於實施 述，其大多依照UL規格。亦即，利用被本發明專 案之難燃性樹脂組成物絕緣被覆的電線具有下列之 適合於作爲符合UL規格之安全規格的機器內配 線，確保火災防止等之安全性的同時，對環境性也 的。 3 ·可撓性扁平電纜之詳細內容 於本發明之可撓性扁平電纜所使用的方形導體 最好爲平板型線狀導體，並無特別之限定，平板型 的銅線爲其代表。 於本發明使用的方形導體之形狀，其寬度W通ί 〜1.6mm，並且，其厚度Τ通常爲0.03〜0.15mm。 體之形狀係其寬度W較其厚度T爲大（亦即，W: 其寬度W與其厚度T之比W/T通常爲6〜45，大多 爲6〜1 6 〇 導體尺寸之具體例（WxT :單位mm )，例如，可列舉： 0·5χ0·05( W/T = 10)、0·6χ0.1 ( W/T 二 6)、0·7χ0.032( W/T 二 22)、 200832450 0.7x0.1 ( W/T = 7 )、0·7χ0·05 ( W/T= 14)、0·7χ0·035( W/T 二 20 )、 0·8χ0·1 ( W/T= 8)、0.8x0.05(W/T=16)、1.2x0.15(W/T 二 8)、 1.4x0.032 ( W/T= 44)等，但是並不受此等具體例所限定。 方形導體之截面積較宜爲 AWG # 20〜AWG # 35 (0.15mm2 〜0.52mm2)。 以一條可撓性扁平電纜使用的複數條方形導體’較宜 包含其寬度或厚度等之剖面形狀爲相同的，必要的話’能 夠組合剖面形狀爲不同的複數條方形導體後而使用。針對 ^ 導體間距，也較宜爲等間隔，必要的話，也可以部分配置 與其他局部導體間距不同的一部分方形導體。例如，藉由 不同於其他可撓性扁平電纜之一部分方形導體的剖面形狀 及/或導體間距之物，也可以設置容許電流値或導體電阻不 同的部分。如後所述，以任意之中間寬度切開可撓性扁平 電纜後而予以分割或分岔之情形，若設置方形導體之剖面 形狀及/或導體間距相互不同的部分的話，因應於各自用途 φ 而採用分割或分岔後之可撓性扁平電纜也成爲可能。 如第1圖所示，本發明之可撓性扁平電纜並列配置複 數條之方形導體（平板型之導體）1 1，藉由絕緣被覆材料 以整體絕緣被覆成形各方形導體之周圍及各方形導體間， 設置絕緣被覆1 2之帶狀電纜1 〇。於第1圖中，顯示方形 導體的條數爲4條之情形，一般而言，雖然一條可撓.性扁 平電纜中之方形導體的條數係根據全寬之寬度、方形導體 之形狀、導體間距之大小等而有所不同’以小間距的配列 之情形，通常爲7〜1 00條；以大間距的配列之情形，通常 -20- 200832450 爲4〜5 0條，但是並不受限於此等之情形。將方 寬度中心部彼此之間距稱爲導體間距。導體間距 需求而加以適宜設定’大多之情形’約爲〇 · 5 mm〜 顯示於第1圖之可撓性扁平電纜1 〇的剖面形 矩形（細長的長方形）。關於中心點P 〇，可撓性 係對稱之形狀的同時，於相鄰接的二條方形導體 中間位置，較宜沿著長邊方向在絕緣被覆1 2之兩 刻痕1 3。同時，2處之邊緣部14的合計4角落設 ® 痕 15。 • 刻痕1 3之形狀係以V字形、圓弧形、u字形 表物。此情形下，較宜以等間隔（相同的導體間 寬度或寬度及厚度相等的方形導體。邊緣部之寬 爲各方形導體間之1 /2間隔。所謂邊緣部係意指 平電纜之寬度方向的端部，與鄰接於此端部之方 端部之間。 0 利用此刻痕1 3而能夠以任意之中間寬度切 扁平電纜後而予以分割或分岔。邊緣部1 4之4角 刻痕1 5之形狀較宜作成成爲利用設置於絕緣被| 痕1 3以使可撓性扁平電纜得以分割或分岔時所 狀。例如，設置於絕緣被覆1 2之刻痕1 3爲V字开 利用該V字形之刻痕1 3切開或分岔可撓性扁平f 便呈現成約略傾斜直線狀之角部刻痕形狀。此情 緣部14之4角落的角部刻痕15之形狀，也較宜 爲相同的傾斜直線狀。設置於絕緣被覆1 2之刻；〇 形導體之 能夠根據 2.5 4 mm 〇 狀係約爲 扁平電纜 1 1、11 之 表面設置 置角部刻 等爲其代 距）配置 度較宜設 可撓性扁 形導體的 開可撓性 落的角部 I 1 2之刻 呈現的形 多的情形， i纜的話， 形下，邊 預先作成 I 1 3 爲圓 -21- 200832450 弧形之情形，利用此圓弧形之刻痕1 3切開後而予以分割或 分岔的話，便呈現成約略半圓之1 /2剖面形狀的角部刻痕 形狀。此情形下，邊緣部14之4角落的角部刻痕1 5之形 狀也較宜預先作成爲相同半圓之1 /2剖面形狀。針對刻痕 1 3爲其他形狀之情形，與上述同樣地相對應。 根據難燃性樹脂組成物所絕緣被覆的可撓性扁平電纜 能夠藉由下列步驟加以製造：以既定之張力與間距而將複 數條方形導體傳送至擠壓機之模具，於其中，從模具熔融 W 擠出難燃性樹脂組成物後而予以被覆。可撓性扁平電纜係 根據適用其部位，方形導體之條數不同的情形爲多的。配 合方形導體之條數而更換模具，花費金錢與時間。製作具 有多條方形導體之平板電纜，對應於各自之規格，若能夠 分割成具有所要求之條數的方形導體之可撓性扁平電纜的 話，能夠緩和上述問題。必須於中途而使可撓性扁平電纜 予以分岔的情形也爲相同的。 0 但是，習知的可撓性扁平電纜，由於設置於其左右兩 端部的邊緣寬度較各方形導體間之間隔的一半寬度爲長， 若以中間寬度切開可撓性扁平電纜，分割成具有各自所要 求條數之方形導體的複數條可撓性扁平電纜的話，於是分 割的各可撓性扁平電纜中之邊緣寬度將不同。因此，將連 接器裝配於端部時，因爲方形導體之位置偏移，必須進行 位置調整，將有變得無法裝配之情形。 針對於此，若調整如上述邊緣部1 4之寬度、刻痕i 3 之形狀及刻痕1 5之形狀的話，能夠解決該問題。亦即，分 -22- 200832450 割或分岔之可撓性扁平電纜便通常具有一定之邊緣。因 此，因爲方形導體之位置成爲固定，不需進行位置調整而 能夠容易地裝配連接器。於分割或分岔後，能夠藉由1次 擠壓步驟以使用相同的模具，製造具有複數種所要求條數 之方形導體的可撓性扁平電纜。 以下，針對本發明之可撓性扁平電纜的較佳形狀加以 說明。 本發明較佳的可撓性扁平電纜之形狀係如第2圖中之 斜視圖所示，藉由絕緣被覆材料以整體絕緣被覆成形的方 式，被覆並列配置的複數條方形導體而形成之可撓性扁平 電纜1 〇，於相鄰接的2條方形導體1 1、1 1之中間位置， 沿著長邊方向在絕緣被覆之兩表面設置刻痕1 3。邊緣部 1 4、1 4之寬度係設爲各方形導體間11、11之1/2間隔。各 方形導體係作成寬度或寬度及厚度相等之物。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible flat cable formed by coating a plurality of square conductors arranged in parallel so as to be integrally insulated and coated by an insulating coating material. More specifically, a flexible flat cable is made of an insulating coating material containing no halogen-based flame retardant, and exhibits high flame retardancy. It has excellent mechanical properties, heat resistance, heat aging resistance, and heat deformation resistance. Properties, low temperature properties (flexibility at low temperatures), electrical insulation, etc. [Prior Art] Various insulating coated wires such as insulated wires or shielded cables, insulated cables, and the like are insulated and coated with an insulating covering material. In the insulated coated electric wire, in addition to the insulating property, flame retardancy is generally required. For this reason, for example, a soft polyvinyl chloride resin, a polyolefin resin composition containing a flame retardant, or the like can be used as an insulating coating material for an insulated coated electric wire used for internal wiring of an electronic device. The soft polyvinyl chloride resin contains a bonding chlorine atom and contains a large amount of a plasticizer. The flame retardant blended in the polyolefin resin composition is a halogen-based flame retardant containing a bromine atom or a chlorine atom in the molecule. Even among the halogen-based flame retardants, a bromine-based flame retardant containing a bromine atom in the molecule has a high flame retarding effect, and is generally used by a synergistic effect caused by the use of cerium oxide. Hard to burn. The brominated flame retardant is also highly flammable due to the use of a phosphorus compound. However, if the insulating coating material such as the polyolefin resin composition containing a soft polyvinyl chloride resin or a halogen-based flame retardant is used for the incineration treatment of the insulated and coated electric wire of 200832450, it is feared that it may be from polyvinyl chloride resin or Halogen-based flame retardants produce corrosive gases or dioxin. Further, when a wire containing a plasticizer or a phosphorus compound is deposited in a waste field, it is feared that the substances are contaminated and contaminated. In recent years, in order to cope with an increase in environmental load reduction requirements, a halogen-free electric wire containing no polyvinyl chloride resin or a halogen-based flame retardant has been developed. On the other hand, in an electric wire such as an insulated wire or an insulated cable used for wiring inside an electronic device, various characteristics suitable for UL (Underwriter Laboratories inc.) specifications are generally sought. In the UL specification, various characteristics such as flame retardancy, heat deformability, low-temperature characteristics, initial properties of the coating material, and tensile properties after heat aging have been specified in detail. Among these various characteristics, the flame retardancy must also be qualified in the vertical burning test of the so-called VW-1 test. Among the UL specifications, this vertical burning test has become one of the most stringent requirements. For example, a flame retardant resin composition containing a metal hydroxide (also referred to as "metal hydrate") such as magnesium hydroxide or aluminum hydroxide in a polyolefin resin is used as an insulating coating material for a halogen-free electric wire. However, since the metal hydride is less flammable than the halogen-based flame retardant, a large amount of metal hydroxide must be blended into the polyolefin resin in order to pass the vertical burning test of the UL specification. As a result, the tensile properties (tensile strength and tensile elongation at break) or heat deformation resistance of the polyolefin resin composition are remarkably lowered, and it becomes unsuitable as an insulating coating material. It is possible to improve the tensile properties or the heat deformation resistance by irradiating the ionizing radiation such as the accelerated electron beam to the polyolefin resin composition in which the metal hydroxide is mixed with the polyolefin resin 200832450. . However, if the halogen-free flame-retardant resin composition is more expensive than the polyvinyl chloride resin, since the irradiation of ionizing radiation must have an expensive irradiation device, there is a disadvantage that the manufacturing cost is further increased. Therefore, development of a halogen-free electric wire is desired, and it conforms to the UL standard vertical burning test even if it is not subjected to cross-linking treatment. A halogen-free flame-retardant resin composition is proposed as a resin composition for a transmission line coating (Patent Document 1) in which a large amount of metal hydrate is blended in a resin component containing an ethylene copolymer and a polyester elastomer. . As the ethylene copolymer, an ethylene-vinyl acetate copolymer having a vinyl acetate content of 25 to 85% by mass can be used. However, the flame retardant resin composition containing the polyester elastomer disclosed in Patent Document 1 is not necessarily sufficient in flame retardancy or insulation resistance, and in particular, the yield in the vertical burning test of the U L standard is not high. A flame retardant resin composition (Patent Document 2) is proposed in which a resin component containing an ethylene copolymer and a thermoplastic resin having a polyester type and/or a polyether type segment is used, and an organic peroxide is used. The metal hydrate treated with the decane coupling agent is melt-mixed. Patent Document 2 discloses a thermoplastic resin having a polyester type and/or a polyether type segment, and examples thereof include a thermoplastic polyester elastomer, a thermoplastic polyurethane elastomer, and a thermoplastic polymerizable polymer. Amine elastomer. However, a resin composition in which the metal hydrate is melt-mixed and mixed with the thermoplastic polyurethane elastomer used in the example of Patent Document 2 (trade name 200832450, manufactured by DIC BAYER POLYMER Co., Ltd.) is used. -8 180N"), and a resin component of an ethylene-vinyl acetate copolymer (trade name "EVAFLEX EV40LX" manufactured by Mitsui DuPont Co., Ltd.) having a vinyl acetate content of 41% by weight, to form a highly balanced flame retardant Insulation coatings such as properties, mechanical properties, heat resistance, heat aging resistance, and heat deformation resistance are difficult. In particular, it is extremely difficult to obtain an insulated coated electric wire which is highly flammable in the UL standard vertical burning test. In the case of a flat cable, the same situation as described above is also achieved, and improvement is being sought. Even in a flat cable, a flat cable formed by coating a plurality of square conductors arranged in parallel so as to be integrally insulated and coated with an insulating coating material is a ribbon cable of a so-called flexible flat cable (FFC). It is suitable for use in active parts of electronic machinery or the like or in narrow places. For example, a polyvinyl chloride resin can be used as the insulating coating material for the flexible flat cable (Patent Document 3). In addition to containing a bonded chlorine atom, a large amount of softener must be contained in order to soften the vinyl chloride resin. Actually, in Patent Document 3, it is disclosed that a large amount of a plasticizer is contained in order to soften the vinyl chloride resin. Such a soft polyvinyl chloride resin, in addition to the risk of causing corrosive gases or dioxins when incinerated, is also concerned about the dissolution of the plasticizer after disposal. [Patent Document 1] Japanese Patent Laid-Open No. 2004-108840 Patent Document 2: Japanese Patent Laid-Open No. 2004-5 No. 903 Patent Publication No. JP-A No. Hei. The problem to be solved by the present invention is to provide a flexible flat cable which is formed by integrally insulating covering an insulating coating material and covering a plurality of square conductors arranged in parallel to form a flexible body. Flat cable, which uses an insulating coating material that does not contain a bonding halogen atom or a halogen-based flame retardant, and exhibits high flame resistance in accordance with UL specifications, and has superior flexibility, mechanical properties, heat resistance, heat aging resistance, and heating. Deformation tolerance, low temperature characteristics, electrical insulation, etc. Another object of the present invention is to provide a flexible flat cable which can be easily divided or branched into a plurality of flat cables including the required number of square conductors, while having the above various characteristics. Further, another object of the present invention is to provide a flexible flat cable which has the above-described various characteristics and which can be easily overlapped or restrained to be a flexible flat cable. In order to solve this problem, the present inventors have found that a flame retardant resin composition can be obtained, and a thermoplastic polyurethane having a hardness within a specific range is contained in a specific ratio, and The resin component of the ethylene-vinyl acetate copolymer in a specific range of the vinyl acetate unit is displayed in the UL specification by containing a specific amount of hydroxide even if the crosslinking treatment due to ionizing radiation is not performed. Qualified high flame retardancy in the vertical burning test V W-1, which can form excellent flexibility (softness), mechanical properties (tensile strength and tensile elongation at break), heat resistance, heat aging resistance, Insulation coating such as heat deformation resistance, low temperature characteristics, and electrical insulation. In particular, when the flame retardant resin composition of the present invention is used as a flexible-10-200832450 flat cable, it exhibits high flame retardancy which is acceptable in the UL standard vertical burning test VW-1, and can be superior. Flexible flat cable with insulation coating such as flexibility, mechanical properties, heat resistance, heat aging resistance, heat deformation resistance, low temperature characteristics, and electrical insulation. A flexible flat cable using such a square conductor can be easily overlapped or restrained as needed, and can be used particularly as a multidirectional branching wiring material inside an electronic device. The flexible flat cable of the present invention can be easily divided or branched by providing a mark on both surfaces of the insulating coating in the longitudinal direction by being formed at the intermediate position of the adjacent square conductors. A plurality of flexible flat cables of the required number of square conductors. Once the score is in place, it will be easier to overlap or tie the flexible flat cable. The present invention has been completed on the basis of such findings. [Embodiment] The present invention provides a flexible flat cable according to the present invention, which is formed by coating a plurality of square conductors of β in parallel so as to be integrally insulated and coated by an insulating coating material. A flexible flat cable characterized in that the insulating coating material is a flame retardant resin composition containing a resin component and a metal hydroxide (C), wherein the resin component is a weight ratio (A : Β ) of 40 : The ratio of 6 0 to 9 0 : 1 0 contains the thermoplastic polyurethane (A) and the content of vinyl acetate in which the JIS hardness measured according to JIS K 7 3 1 1 is A97 or less. 5 to 90% by weight of the ethylene-vinyl acetate copolymer (B), and the insulating coating material contains 10 to 250 parts by weight of metal hydroxide with respect to 100 parts by weight of the resin component. (C). 200832450 [Effects of the Invention] According to the present invention, there is provided a flexible flat cable which is displayed in the high flame retardancy of the UL standard vertical burning test VW-1 even if the crosslinking treatment due to ionizing radiation is not performed. Qualified to form an insulating coating with superior flexibility, mechanical properties, heat resistance, heat aging resistance, heat deformation resistance, low temperature properties, electrical insulation, etc. (hereinafter, also referred to as "insulation coating layer" or simply " Flexible flat cable with cover"). The flexible flat cable of the present invention has a structure in which a notch is provided on both surfaces of the insulating coating along the longitudinal direction at an intermediate position between the adjacent square stomach conductors, and can be easily divided or branched into a containing portion. A plurality of flexible flat cables requiring a square conductor number. Flexible flat cables are likely to interfere with air circulation within the electronic machine due to their strip shape, and are preferably overlapped or bound. According to the present invention, it can be used as a multidirectional branching wiring material by not only neatly overlapping or restraining, but also providing a score structure. [Embodiment of the Invention] 1 - A flexible flat cable, for example, the flexible flat cable of the present invention has a cross-sectional structure shown in Fig. 1. Specifically, the flexible flat cable 1 of the present invention is provided with a plurality of square conductors (plate-type conductors) n, n, n, ... arranged in parallel, and the periphery of each of the square conductors is formed by integrally insulating covering the insulating coating material and A ribbon cable of insulating covering 12 is disposed between each of the square conductors. A preferred construction of the flexible flat cable will be described later. 2·Insulation coating material 12-200832450 The most characteristic feature of the present invention resides in the formation of an insulating coating material of an insulating coating 12. The insulating coating material used in the present invention is a flame retardant resin composition containing a resin component and a metal hydroxide (C), wherein the resin component is 40:60 to 9 by weight ratio (A:B). The ratio of 0:1 〇 contains the thermoplastic polyurethane elastomer (A) having a JIS hardness of A97 or less and the content of the vinyl acetate unit of 50 to 90% by weight in accordance with JIS K 731 1. The ethylene-vinyl acetate copolymer (B) is a metal hydroxide (C) in a proportion of 40 to 250 parts by weight based on 1 part by weight of the resin component. The thermoplastic elastomer (TPE) is a polymer containing two components of a rubber component (soft segment) having elasticity and a molecular restriction component (hard segment) for preventing plastic deformation. The thermoplastic polyurethane elastomer (TPU) used in the present invention is based on the intermolecular components of three components of a high molecular weight diol (long chain diol), a diisocyanate, and a low molecular weight diol (short chain diol). A polymer having a urethane group (mono NH-COO-) in the molecule formed by the reaction. The long-chain diol and the short-chain diol are subjected to an addition reaction with a diisocyanate to form a linear polyurethane. Among these polyurethanes, the long-chain diol forms a soft portion (soft segment) of the elastomer, and the diisocyanate forms a hard portion (hard segment) with the short-chain diol. The basic characteristics of the thermoplastic polyurethane elastomer are mainly determined by the type of the long-chain diol, and the hardness is adjusted in proportion to the hard segment. For example, examples of the long-chain diol include polypropylene glycol (PPG), polytetramethylene glycol (PTMG), poly(butylene adipate) diol (PBA), and poly-ε-200832450 caprolactone diol ( PCL), poly(extended hexyl carbonate) diol (PHC), poly(extended ethyl/1,4-adipate) diol, poly(1,6-extension hexyl/exopendyl adipic acid Ester) diols and the like. Depending on the type of the long-chain diol, for example, the type of the thermoplastic resin polyurethane elastomer is classified into an adipate type, a caprolactone type, a PTMG type, a polycarbonate (PC) type, and the like. For example, examples of the diisocyanate include 4,4'-diphenylmethane diisocyanate, exohexyl diisocyanate, isophorone diisocyanate, 4,4 5-dicyclohexylmethane diisocyanate and the like. For example, examples of the short-chain diol include 1,4-butanediol, 1,6-hexanediol, and 1,4-bis(2-hydroxyethoxy)benzene. The thermoplastic polyurethane elastic system used in the present invention is a hardness measured by a type A durometer in accordance with JIS K 73 1 1 (test method for polyurethane-based thermoplastic elastomer). =JIS; also known as "JIS A hardness") is below A97. When the JIS hardness of the thermoplastic urethane elastomer is 98 or more, the tensile elongation at break of the insulating coating composed of the flame retardant resin composition is remarkably low, and the flexibility of the insulating coating is affected. damage. The JIS hardness of the thermoplastic polyurethane elastomer used in the present invention is preferably A50 to A96, more preferably A60 to A95, and particularly preferably A7 0 to A9 3 . When the JIS hardness of the thermoplastic urethane elastomer is within this range, the mechanical properties, heat resistance, heat aging resistance, and heat deformation of the insulating coating composed of the flame retardant resin composition can be withstood. Various characteristics such as properties and low temperature characteristics are highly balanced and preferred. From the viewpoint of extrusion processability, mechanical properties, etc., the melt rate of the molecular weight index of the thermoplastic polyurethane elastomer used in the present invention is -14324324 (hereinafter referred to as "MFR"; K 7210, measured at a temperature of 210 ° C and a load of 5000 g, is preferably 〇·ι~i〇〇g/10 minutes, more preferably 0.5 to 50 g/10 minutes. The ethylene-vinyl acetate copolymer used in the present invention is a copolymer of ethylene and vinyl acetate having a vinyl acetate unit content (abbreviated as vinyl acetate content) of 50 to 90% by weight. When the content of the vinyl acetate unit of the ethylene-vinyl acetate copolymer is too low, it is difficult to obtain a resin composition having excellent flame retardancy, mechanical properties, heat resistance, heat aging resistance, and heat deformation resistance. In particular, it is impossible to form an insulating coating which is highly flammable in the vertical burning test VW-1. The content of the vinyl acetate unit is preferably from 5 5 to 85% by weight, more preferably from 60 to 83% by weight. The ethylene-vinyl acetate copolymer used in the present invention can form a flame retardancy having various properties such as excellent flame retardancy or tensile properties by setting the content of the vinyl acetate unit within the range. Insulation coating composed of a resin composition. The MFR (measured according to JIS K 7210, temperature 190 ° C, load 2160 g) which is the molecular weight index of the ethylene-vinyl acetate copolymer used in the present invention is preferably 0.1 based on the viewpoints of extrusion processability, mechanical properties, and the like. ~1 0 0 g / 1 0 minutes, more preferably 0.5 to 5 0 g / 1 0 minutes. In the present invention, a thermoplastic polyurethane-containing elastomer (component A) and an ethylene-vinyl acetate copolymer (component B) are used, and the weight ratio (A: Β) of the two is 40: 60. Resin component contained in the range of ~9 0:10. If the weight ratio of the thermoplastic polyurethane elastomer in the resin component is too low, the flame retardancy is lowered, and it is not acceptable in the UL-standard -15-200832450 vertical burning test VW-1. Even if the weight ratio of the thermoplastic polyurethane elastomer in the resin component is too high, the flame retardancy is lowered, and it is not acceptable in the UL standard vertical burning test VW-1. When the weight ratio of the ethylene-vinyl acetate copolymer is too low, the flame retardancy is liable to be lowered, and if it is too high, the flame retardancy is liable to lower, or the tensile elongation at break is lowered. The weight ratio (A: B) of the thermoplastic component of the thermoplastic polyurethane elastomer (A hemp) to the ethylene-vinyl acetate copolymer (component B) is preferably 45: 55 to 85: 15, Good for 50: 50~80: 20. _ For example, the metal hydroxide may be exemplified by magnesium hydroxide and aluminum hydroxide. Among these metal hydroxides, magnesium hydroxide is preferred from the viewpoint of superior flame retardancy. Magnesium hydroxide can be used not only as a synthetic product, but also as a naturally occurring magnesium hydroxide (natural magnesium hydroxide) using hydrotalcite ore as a raw material, which can be formed to meet flame retardancy, tensile properties, heat deformation, and low temperature. Insulation coatings specified by UL specifications such as characteristics are advantageous for reducing manufacturing costs. 0. From the viewpoint of dispersibility with respect to the resin component, it is desirable that the metal hydroxide of the magnesium hydroxide or the like has a selected average particle diameter (equivalent diameter obtained by a laser diffraction/scattering method) of preferably 0.3 to 7 μm, more preferably The content of the BET specific surface area is preferably from 2 to 20 m 2 /g, more preferably from 3 to 15 m 2 /g, in the range of from 0.5 to 5 μm. From the viewpoint of dispersibility, the metal hydroxide can be used in a grade which is not subjected to surface treatment, and a fatty acid, a phosphate ester, a decane-based coupling agent, a titanium-based coupling agent, an aluminum-based coupling agent such as stearic acid or oleic acid is preferably used. The grade of the surface treatment of the surface treatment agent. The blend ratio of the metal hydroxide is 40 to 250 parts by weight, more preferably 50 to 240 parts by weight, still more preferably 2,000 parts by weight, based on 100 parts by weight of the resin component. When the proportion of the right metal gas compound is too low, the flame retardancy is insufficient, and if it is too high, the melting torque of the flame retardant resin composition is not high because of the extrusion moldability. Tensile elongation at break will also decrease. In the flame retardant resin composition used in the present invention, it is possible to add the following materials as required: inorganic systems such as antimony trioxide, zinc stannate, zinc hydroxystannate, zinc borate, zinc carbonate, and basic magnesium carbonate. A flame retardant or a flame retardant aid; a nitrogen-based flame retardant such as melamine isocyanate; a phosphorus-based flame retardant such as a condensed lactic acid ester. In the flame retardant resin composition used in the present invention, if necessary, the following substances may be added: a lubricant, an antioxidant, a processing stabilizer, a hydrolysis inhibitor, a heavy metal inactivator, a coloring agent, a chelating agent, a reinforcing material, and a hair styling agent. Conventional blending drugs such as foaming agents. The flame retardant resin composition used in the present invention can be obtained by using a conventional melt mixer such as an open roll, a Bumbury mixer, a pressure kneader, a uniaxial or multiaxial mixer, or the like. It is prepared by mixing a resin component, a metal hydroxide, and other components added as necessary. The flame retardant resin composition can form a form of nine particles. The flame retardant resin composition used in the present invention can be used for the insulating coating of a flexible flat cable. In this case, various characteristics such as excellent tensile properties and flame retardancy can be formed without performing the crosslinking treatment. On the other hand, in the case where it is desired to use the insulating coating of the flame retardant resin composition by crosslinking, the crosslinking treatment may be carried out. Specifically, in 200832450, the flame retardant resin composition is used to form an insulating coating of a flexible flat cable, and when the ionizing radiation such as an accelerated electron beam or a gamma line is irradiated, the insulating coating can be crosslinked. When the organic peroxide is contained in the flame retardant resin composition, it can be crosslinked and insulated according to heating. At the time of the crosslinking treatment, a polyfunctional monomer can also be added in advance to the flame retardant resin composition. By performing the crosslinking treatment, characteristics such as tensile properties or heat resistance can also be improved. The flexible flat cable having the insulating coating formed of the flame retardant resin composition of the present invention conforms to the u L standard, and particularly has only a high flame retardancy which is acceptable in the vertical burning test vw-1. This insulating coating not only has excellent initial tensile strength and tensile elongation at break, but also has good tensile properties after heat aging. Using a tensile tester, when the tensile speed is 50 mm/min, the distance between the lines is 25 mm, and the temperature is 23 °C, it is possible to obtain an insulating coating with excellent tensile properties: tensile strength of 8.2 MPa or more. In most cases, it is 10.0 to 20. OMPa; the tensile elongation at break is 100% or more, and in most cases, it is 105 to 23%. The insulation coating is applied to a gear oven of 1 13 ° C, and the tensile strength residual rate after being subjected to the heat aging test for 168 hours is more than 75%, preferably 80% or more, and tensile elongation at break. It is more than 75%, preferably more than 80%. An insulated flat cable having an insulating coating formed of the flame-retardant resin composition of the present invention, wherein each of the divided samples (a sample containing one square conductor) is placed in a gear oven at 100 ° C, After heat for 60 minutes, the disk was clamped from the upper portion of the sample by a disc-shaped jig having a weight of 205111 g of 205111 g for 60 minutes, and when the deformation residual ratio was measured, it was possible to show that after adding -18-200832450 60%, the edge was covered. The characteristics of the application for the application of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the singularity of the Better yet. The flexible flat cable having the excellent flame-retardant resin composition of the present invention has excellent low-temperature characteristics, and each sub-sample (sample containing one square conductor) is placed in a low-temperature tank of -10 ° C. After an hour, at a temperature of -1 〇 ° C, when the gold curvature of the diameter twice the outer diameter of the sample was U-shaped, cracks (cracks) did not occur in the insulating coating. The details of the measurement methods for these various characteristics are described in the description, and most of them are in accordance with the UL standard. In other words, the electric wire insulated and covered with the flame retardant resin composition of the present invention has the following internal wiring suitable for safety standards in accordance with UL standards, and ensures safety against fire and the like, and environmental protection. of. 3 . Detail of the flexible flat cable The square conductor used in the flexible flat cable of the present invention is preferably a flat linear conductor, and is not particularly limited, and a flat copper wire is representative. The shape of the square conductor used in the present invention has a width W of 1.6 mm and a thickness Τ of usually 0.03 to 0.15 mm. The shape of the body is such that its width W is larger than its thickness T (that is, W: the ratio W/T of its width W to its thickness T is usually 6 to 45, and is mostly a specific example of a conductor size of 6 to 16 〇 (WxT) : unit mm), for example, 0·5χ0·05 (W/T = 10), 0·6χ0.1 (W/T 2 6), 0·7χ0.032 (W/T 22), 200832450 0.7x0.1 ( W/T = 7 ), 0·7χ0·05 (W/T= 14), 0·7χ0·035 (W/T 2 20), 0·8χ0·1 (W/T= 8) , 0.8x0.05 (W/T=16), 1.2x0.15 (W/T 2-8), 1.4x0.032 (W/T=44), etc., but are not limited by these specific examples. The cross-sectional area of the conductor is preferably AWG #20~AWG # 35 (0.15mm2 to 0.52mm2). The plurality of square conductors used in one flexible flat cable preferably have the same cross-sectional shape such as width or thickness. If necessary, it can be used by combining a plurality of square conductors having different cross-sectional shapes. It is also preferable to equidistantly separate the conductor pitches, and if necessary, partially arrange a part of the square conductors having different pitches from other local conductors. By using one part of the other flexible flat cable A cross-sectional shape of the shape conductor and/or a conductor pitch may be provided with a portion that allows a current 値 or a conductor resistance. As will be described later, the flexible flat cable is cut at an arbitrary intermediate width to be divided or divided. In the case where the cross-sectional shape of the square conductor and/or the conductor pitch are different from each other, it is also possible to use a flexible flat cable that is divided or branched for each use φ. As shown in Fig. 1, this The flexible flat cable of the invention is arranged in parallel with a plurality of square conductors (flat-plate type conductors) 1 , and is formed by insulating covering the entire circumference of each of the square conductors and between the square conductors by insulating covering material, and providing an insulating coating 1 2 Ribbon cable 1 〇. In Figure 1, the number of square conductors is four. Generally speaking, although the number of square conductors in a flexible flat cable is based on the width of the full width, The shape of the square conductor, the size of the conductor pitch, etc. are different. 'In the case of a small pitch, it is usually 7 to 100; in the case of a large pitch, usually -20- 200832450 is 4 to 50, but it is not limited to this. The distance between the center portions of the square widths is called the conductor pitch. The conductor spacing is appropriately set. 'Most of the situation' is about 〇 · 5 mm ~ The rectangular shape (slender rectangle) of the flexible flat cable 1 显示 shown in Fig. 1. Regarding the center point P 〇, the flexibility is symmetrical and the two squares adjacent to each other In the middle position of the conductor, it is preferable to cover the two nicks 1 3 of the insulation 1 2 along the longitudinal direction. At the same time, the total 4 corners of the edge portions 14 of the two places are set with the mark 15 . • The shape of the score 1 3 is in the shape of a V-shape, a circular arc, or a u-shaped object. In this case, it is preferable to have equal intervals (the same width between conductors or square conductors having the same width and thickness). The width of the edge portion is 1 / 2 interval between the square conductors. The so-called edge portion means the width direction of the flat cable. The end portion is adjacent to the end portion adjacent to the end portion. 0 By using the notch 1 3, the flat cable can be cut and split with an arbitrary intermediate width, and the four corners of the edge portion 1 4 are scored. The shape of 1 5 is preferably formed so as to be separated from or separated by the insulating layer 1 to make the flexible flat cable split. For example, the score 1 3 provided on the insulating coating 1 is V-shaped. The shape of the corner portion of the corner portion of the four corners of the edge portion 14 is also formed by the shape of the corner portion of the corner portion of the edge portion 14 by using the V-shaped score 13 to cut or split the flexible flat shape f. It should be the same oblique straight line. It is set at the moment of the insulation coating 1 2; the shape of the 〇-shaped conductor can be set according to the 2.5 4 mm 〇 shape, and the surface of the flat cable 1 1 and 11 is set to be the corner. The degree of configuration is better than the flexibility of the flexible flat conductor In the case where the corner I 1 2 is in the shape of a large number of shapes, in the case of the i-cable, the side is preliminarily made into a case where the I 1 3 is a circle of -21 to 200832450, and the arc-shaped nick 1 3 is used. When it is divided or divided, it is formed into a corner-scarred shape of a 1⁄2 cross-sectional shape of approximately a semicircle. In this case, the shape of the corner notch 15 at the corners of the four corners of the edge portion 14 is also preferably formed in the same 1⁄2 cross-sectional shape of the same semicircle. In the case where the score 1 3 is another shape, it corresponds to the above. The flexible flat cable insulated and coated according to the flame retardant resin composition can be manufactured by transferring a plurality of square conductors to a die of an extruder at a predetermined tension and spacing, in which molten from the mold W After the flame retardant resin composition is extruded, it is coated. Flexible flat cable The number of square conductors varies depending on the part to be applied. It takes money and time to replace the mold with the number of square conductors. A flat cable having a plurality of square conductors can be made to be able to alleviate the above problem if it can be divided into flexible flat cables having the required number of square conductors in accordance with the respective specifications. The case where the flexible flat cable must be branched in the middle is also the same. 0 However, the conventional flexible flat cable has a width which is longer than a half width of the distance between the square conductors at the left and right end portions, and is cut into a flexible flat cable at an intermediate width. In the case of a plurality of flexible flat cables of the number of square conductors required, the width of the edge of each of the divided flexible flat cables will be different. Therefore, when the connector is attached to the end, since the position of the square conductor is shifted, the position adjustment must be performed, and there is a case where it becomes impossible to assemble. On the other hand, if the width of the edge portion 14 , the shape of the score i 3 , and the shape of the score 15 are adjusted, the problem can be solved. That is, the flexible flat cable of -22-200832450 cut or split usually has a certain edge. Therefore, since the position of the square conductor is fixed, the connector can be easily assembled without performing position adjustment. After the division or splitting, a flexible flat cable having a plurality of required square conductors can be manufactured by using one extrusion step to use the same mold. Hereinafter, a preferred shape of the flexible flat cable of the present invention will be described. The shape of the preferred flexible flat cable according to the present invention is as shown in a perspective view in Fig. 2, and is formed by coating a plurality of square conductors arranged in parallel so as to be integrally insulated and coated by the insulating coating material. The flat cable 1 〇 is provided with a score 13 on both surfaces of the insulating coating along the longitudinal direction at a position intermediate between the adjacent two square conductors 1 1 and 11. The width of the edge portions 14 and 14 is 1/2 of the interval between the square conductors 11, 11. Each square guide system is made to have the same width or width and thickness.
因此，若將方形導體之條數設爲η ;將可撓性扁平電 $ 纜之全寬設爲W ;將方形導體之配列間距（導體間距）設 爲Ρ ;將可撓性扁平電纜之邊緣部1 4、1 4之寬度設爲Μ ; 將方形導體之寬度設爲C ;將各方形導體間之間隔設爲G 的話，本發明之可撓性扁平電纜更佳爲符合下列之關係式： (1 ) W= Ρχη (2 ) P = C + 2xM (3 ) G = 2 x M 邊緣部1 4、1 4之角部刻痕1 5係如上所述’與利用刻 痕1 3以切開可撓/性扁平電纜後而予以分割或分岔時所呈 -23- 200832450 現之形狀相一致。 顯示於第2圖之可撓性扁平電纜能夠以任意位置之中 間寬度切開後而予以分割或分岔。分割或分岔之可撓性扁 平電纜係使邊緣之寬度及形狀成爲相同，往連接器之裝配 爲容易的。 本發明之可撓性扁平電纜能夠使用從上流側向下流側 依序具備下列構造之製造裝置而加以製造：1 )供給方形導 體之供應繞線機群；2 )以既定之間距排列所供給的方形導 ^ 體之集線機；3 )熔融擠出絕緣被覆材料後而形成絕緣被 覆，形成於內部含有複數條方形導體之可撓性扁平電纜的 擠出機。於本發明中，絕緣被覆材料係使用上述之難燃性 樹脂組成物。 於擠出機之下流側，配置捲取轉筒，於此之前，配置 爲了以任意之中間寬度而分割通過擠出機之可撓性扁平電 纜的剪取機；配置爲了捲取分割成2條以上之各自可撓性 0 扁平電纜的捲取機。模具之中空形狀較宜作成對應於上述 邊緣部之角部刻痕1 5及絕緣被覆之刻痕1 3。調整模具之 剖面形狀爲困難之情形等，也可以於模具之下流側配置爲 了形成邊緣部之角部刻痕1 5及絕緣被覆之刻痕1 3的夾具。 本發明之可撓性扁平電纜係適合於在液晶電視之配線 等狹窄空間中之配線或具有活動部分的電子機器之配線 等。本發明之可撓性扁平電纜除了能夠利用設置於絕緣被 覆之刻痕後而予以分割或分岔之外，整齊之折疊或束縛也 爲容易的。 -24- 200832450 〔實施例〕 以下，列舉實施例及比較例，更具體說明本發明，但 是本發明並不僅受此等之實施例所限定。各物性及特性之 評估方法係如下所述： (1 )難燃性之評估 遵照UL規格1 5 8 1，將5點試料提供垂直燃燒試驗 VW-1，5點均合格之情形判定爲「合格」。其判定基準係 對各試料重複5次的15秒鐘著火之情形下，60秒鐘以內 熄火，舖設於下部之脫脂棉並不因燃燒落下物而延燒，將 裝配於試料上部之牛皮紙既不燃燒也不烤焦之物判定爲合 格。針對5點試料均合格者，揭示各試驗中之最長延燒時 間的平均値（5點之平均値）。 (2 )拉伸特性之評估 針對試料之絕緣被覆層，進行拉伸試驗（拉伸速度二 5 0mm/分鐘、標線間距離二25 mm、溫度=23 °C )，利用各 0 3點之試料測定拉伸強度與拉伸斷裂伸度，求出此等之平 均値。依照UL規格，將拉伸強度爲8.2 MPa以上且拉伸斷 裂伸度100%以上之物判定爲「合格」。 (3 )耐熱老化性之評估 耐熱性之評估係藉由將試料之絕緣被覆層放置於1 1 3 °C之齒輪烘箱中1 68小時而予以受熱老化後，利用相同於 上述之條件而實施拉伸試驗所進行的。依照UL規格，將 具有拉伸殘率〔=100%χ (受熱老化後之伸度/受熱老化前 之伸度）〕爲75%以上，並且，拉伸強度殘率〔=1〇〇%乂 -25 - 200832450 (受熱老化後之拉伸強度/受熱老化前之拉伸強度）〕爲 75%以上之物判定爲「合格」。 (4 )加熱變形承受性之評估 將試料放置於100X：之齒輪烘箱中，預熱60分鐘後， 利用載重25 0g、外徑9.5 mm之圓盤狀夾具按壓60分鐘， 絕緣體之變形殘率〔=1 0 0 X (試驗後之厚度/試驗前之厚 度）〕爲50%以上之物判定爲「合格」。 (5 )低溫特性之評估 ® 將試料放置於-1 〇°C之低溫槽中4小時，之後利用試料 外徑2倍之直徑的金屬棒，於-1 0 °C進行U字彎曲，利用目 視以判定絕緣被覆層的裂紋（裂縫）之有無。將無裂紋之 物判定低溫特性爲「合格」。 〔實施例1〕 使用雙軸混合機（45mm (/)、L/D= 42 )，利用顯示於 表1之實施例1的摻合配方以熔融混合各成分，熔融擠出 0 成爲絲束狀，接著，冷卻切斷熔融絲束後而製作九粒。於 表1揭示之樹脂組成物中，相對於樹脂成分1 00重量份， 摻合作爲潤滑劑之油酸醯胺0.5重量份、與作爲抗氧化劑 之季戊四醇四〔3-(3,5-二第三丁基-4-羥苯基）丙酸酯〕1 重量份。 從供應繞線機群而將8條寬度1.2 m m、厚度0.1 5 m m之 方形導體（平板型之鍍錫銅線）傳送至集線機，以導體間 距2.0 m m並列配置。接著，並列配置的8條方形導體傳送 至熔融擠出機之模具，從熔融擠出機供應顯示於表1之實 -26 - 200832450 施例1的樹脂組成物之九粒後而絕緣被覆。絕緣被覆之厚 度爲0.2mm，設置於絕緣被覆兩面之刻痕的形狀爲V字形 (深度〇.2mm)，邊緣部之角部刻痕的形狀爲傾斜的直線 狀，邊緣部之寬度係各方形導體間之1 /2間隔。 從進行如此之方式所得的可撓性扁平電纜，切取含有 8條方形導體之試料，進行垂直燃燒試驗後，於垂直燃燒 試驗VW-1中合格，5點試料之最長燃燒時間的平均値係 4 2秒鐘且具優異的之難燃性。將結果顯示於表1。 ® 〔實施例2〜8〕 於實施例1中，除了將難燃性樹脂組成物之摻合配方 變更爲表1之實施例2〜8之物以外，進行相同於實施例1 之方式而製作各可撓性扁平電纜。將結果顯示於表1。Therefore, if the number of square conductors is η; the full width of the flexible flat cable is W; the arrangement pitch of the square conductors (conductor pitch) is Ρ; the edge of the flexible flat cable The width of the portions 1 4 and 14 is set to Μ; the width of the square conductor is C; and the interval between the square conductors is G, the flexible flat cable of the present invention preferably conforms to the following relationship: (1) W = Ρχη (2 ) P = C + 2xM (3 ) G = 2 x M The corner portion 1 4, 1 4 corner portion of the score 1 5 is as described above 'with the use of the score 1 3 to cut The shape of the -23-200832450 is the same when the flexible/flat cable is divided and split. The flexible flat cable shown in Fig. 2 can be divided or divided after being cut at a width between any position. The flexible flat cable that is divided or split makes the width and shape of the edges the same, and assembly to the connector is easy. The flexible flat cable of the present invention can be manufactured by using a manufacturing apparatus having the following structures from the upstream side to the downstream side in sequence: 1) a supply winding machine group supplying square conductors; 2) being supplied in a predetermined interval A square wire guide machine; 3) An extruder that melt-extrudes an insulating coating material to form an insulating coating and is formed in a flexible flat cable containing a plurality of square conductors therein. In the present invention, the insulating coating material is a flame retardant resin composition as described above. On the flow side below the extruder, a take-up reel is arranged. Prior to this, a cutter for dividing the flexible flat cable passing through the extruder with an arbitrary intermediate width is arranged; the arrangement is divided into two pieces for winding. The above coilers for each flexible 0 flat cable. The hollow shape of the mold is preferably formed to correspond to the corner portion fissure 15 of the edge portion and the score 13 of the insulating coating. The case where the cross-sectional shape of the mold is adjusted is difficult, and the jig of the corner portion of the edge portion and the notch 13 of the insulating coating may be disposed on the flow side below the mold. The flexible flat cable of the present invention is suitable for wiring in a narrow space such as a wiring of a liquid crystal television or wiring of an electronic device having a movable portion. The flexible flat cable of the present invention can be folded or bound neatly in addition to being divided or branched by the indentation provided on the insulating coating. [Embodiment] Hereinafter, the present invention will be more specifically described by way of examples and comparative examples, but the present invention is not limited by the examples. The evaluation methods for each physical property and characteristics are as follows: (1) Evaluation of flame retardancy According to UL specification 1 5 8 1, the 5-point sample is provided with vertical burning test VW-1, and 5 points are qualified. "." When the judgment criterion is that the sample is fired for 15 times in 15 seconds, the flame is extinguished within 60 seconds, and the absorbent cotton laid on the lower portion is not burned by burning the fallen matter, and the kraft paper attached to the upper portion of the sample is neither burned. Items that are not scorched are judged to be qualified. For those who passed the 5-point sample, the average enthalpy (the average enthalpy of 5 points) of the longest burning time in each test was revealed. (2) Evaluation of tensile properties For the insulating coating of the sample, a tensile test (tensile speed of 250 mm/min, distance between the marking lines of 25 mm, temperature = 23 °C) was used, and each of the 0 3 points was used. The tensile strength and tensile elongation at break were measured for the samples, and the average enthalpy of these was determined. According to the UL standard, a product having a tensile strength of 8.2 MPa or more and a tensile elongation at break of 100% or more was judged as "acceptable". (3) Evaluation of heat aging resistance The evaluation of heat resistance was carried out by subjecting the insulating coating of the sample to a gear oven at 1 13 ° C for 1 68 hours, and then subjected to heat aging, and then using the same conditions as described above. Stretched by the test. According to the UL specification, it will have a tensile residual ratio [=100%χ (extension after heat aging/extension before heat aging)] of 75% or more, and tensile strength residual rate [=1〇〇%乂-25 - 200832450 (Tensile strength after heat aging/tensile strength before heat aging)] is judged to be "acceptable" for 75% or more. (4) Evaluation of heat deformation resistance The sample was placed in a 100X: gear oven, and after preheating for 60 minutes, the disc was clamped for 60 minutes using a disc-shaped jig with a load of 25 0 g and an outer diameter of 9.5 mm, and the deformation residual ratio of the insulator [ =1 0 0 X (thickness after test/thickness before test)] The content of 50% or more was judged as "acceptable". (5) Evaluation of low-temperature characteristics® The sample was placed in a low-temperature bath at -1 °C for 4 hours, and then bent in U-shape at -10 °C using a metal rod having a diameter twice the outer diameter of the sample. It is determined whether or not cracks (cracks) of the insulating coating layer are present. The crack-free material was judged to be "acceptable" for its low-temperature characteristics. [Example 1] Using a biaxial mixer (45 mm (/), L/D = 42), the blending formulation of Example 1 shown in Table 1 was used to melt-mix the components, and melt-extruded 0 into a tow shape. Then, after the molten tow was cut by cooling, nine particles were produced. In the resin composition disclosed in Table 1, 0.5 parts by weight of oleic acid oleic acid is blended as a lubricant with respect to 100 parts by weight of the resin component, and pentaerythritol tetra [3-(3,5-di) as an antioxidant. Tributyl-4-hydroxyphenyl)propionate] 1 part by weight. From the supply of the winding machine group, eight square conductors (flat-plate tinned copper wires) having a width of 1.2 m and a thickness of 0.15 m were transferred to the hub, and arranged in parallel with a conductor pitch of 2.0 m. Next, eight square conductors arranged in parallel were transferred to a mold of a melt extruder, and nine pellets of the resin composition shown in Table 1 of Table 1 were supplied from the melt extruder, followed by insulation coating. The thickness of the insulating coating is 0.2 mm, the shape of the notch provided on both sides of the insulating coating is V-shaped (depth 〇.2 mm), the shape of the corner portion of the edge portion is inclined straight, and the width of the edge portion is square. 1 /2 spacing between conductors. From the flexible flat cable obtained in this manner, the sample containing eight square conductors was cut out, and after the vertical burning test, it was passed in the vertical burning test VW-1, and the average enthalpy of the longest burning time of the five-point sample was 4 2 seconds and excellent flame retardancy. The results are shown in Table 1. ® [Examples 2 to 8] In Example 1, except that the blending formulation of the flame retardant resin composition was changed to the examples 2 to 8 of Table 1, the same procedure as in Example 1 was carried out. Each flexible flat cable. The results are shown in Table 1.
-27 - 200832450-27 - 200832450
【I撇】 實施例 oo 60 40 120 15 合格 13.0 150 oo OO 00 cn v〇 合格 卜 50 50 130 30 合格 12.9 180 CN 卜 os oo s 合格 60 40 160 25 合格 15.0 110 m o ON OS m ON 合格 IT) 60 40 150 25 合格 13.3 155 ^ 〇 OO ON 00 合格 寸 III 沄丨丨 II I ^ 1 ? 1 1 1 55 合格 18.0 220 o o ON OO o 00 合格 70 30 250 33 合格 10.8 110 卜 w 00 oo vn On 合格 CN 40 60 150 20 合格 11.0 140 ON (N OO OS σ\ 合格 r-H 90 10 180 42 合格 16.0 130 ^ (N ON On as 合格 OOOOOOooOOqOq^q^ <<<<<<<< 式家式 II II II II 11 II II II i i ; 越贼_侧赠瓶也赠 〇 〇 ^ 酲醇® ® 1S酲龌酲 II 11 !| »—>>—>·—> ^ y> ^ D Ο 到白ρ & D到到& Μ Μ M r S5 Sij Dh BtJ Ph aQI ain SI 孩卿' 獅獅紋 I 〇 H 〇 H I ^ ^ ^ τ s _ _ 顆 s ^ s, « «55 K ^ M i—. /-^v S /^N N /—S r-N Ο « rwtp CN CO 寸 ~*(Nm 寸 ιοόγ^οο — — l®p t-η i—i t—* ,~i CL· / V—^ NW/ > SW^ 'S^/ H S 領 3 m S 繫 ίΓ iH 降冢 1 < 1 > 篇 Μ m 續 jk _ "c? fi m m t： 紧 i5i έ /^N 踩 g M 鯀 i： 幽 M 懲^ 鲥》 mm 敢录 feua eg 繼_ x 最P if 樂想 加熱變形殘率(％) 低溫特性 丨OOCN- 200832450 (註記） (1) 己二酸酯型TPU(JIS硬度= A80):軟鏈段爲 己二酸酯型，且Π S硬度爲A 8 0之熱可塑性聚胺基甲酸酯 彈性體、 (2) PTMG型TPU(JIS硬度= A80):軟鏈段爲聚伸 丁基二醇型，且JIS硬度爲A80之熱可塑性聚胺基甲酸酯 彈性體、 (3) 卩(：型丁？11(«113硬度=八80):軟鏈段爲聚碳酸 酯型，且JIS硬度爲A80之熱可塑性聚胺基甲酸酯彈性體、 (4) PTMG型TPU(JIS硬度= A85):軟鏈段爲聚伸 丁基二醇型，且JIS硬度爲A85之熱可塑性聚胺基甲酸酯 彈性體、 (5) ?<3型丁？1；(〗18硬度=八85):軟鏈段爲聚碳酸 酯型，且JIS硬度爲A85之熱可塑性聚胺基甲酸酯彈性體、 (6) 己二酸酯型TPU(JIS硬度= A85):軟鏈段爲 己二酸酯型，且JIS硬度爲A85之熱可塑性聚胺基甲酸酯 彈性體、 (7 )己二酸酯型TPU ( JIS硬度=A97 ) ••軟鏈段爲 己二酸酯型，且JIS硬度爲A97之熱可塑性聚胺基甲酸酯 彈性體、 (8) ?丁^^型丁？11(113硬度=八98):軟鏈段爲聚伸 丁基二醇型，且JIS硬度爲A98之熱可塑性聚胺基甲酸酯 彈性體、 (9) EVA-1:醋酸乙烯酯單位之含量爲90重量％之乙 -29- 200832450 烯-醋酸乙烯酯共聚物〔門尼（Mooney )黏度（ML 1+ 4、100 °C ) = 28〕、 (10 ) EVA-2 :醋酸乙烯酯單位之含量爲50重量％之 乙烯-醋酸乙烯酯共聚物〔門尼黏度（ML1+ 4、1〇〇。〇 ) = 27〕、 (1 1 ) EVA-3 醋酸乙烯酯單位之含量爲41重量％之 乙烯-醋酸乙烯酯共聚物（MFR二2g/10分鐘）、 (12 )合成氫氧化鎂：平均粒徑=〇.80111、6£1'比表面 ^ 積=6m2,g、胺基矽烷處理品、合成品、 (13) 天然氫氧化鎂：平均粒徑= 3μπ1、胺基矽烷處 理品、天然品 (14) 有機過氧化物：2,5-二甲基-2,5-二（第三丁基 過氧化）己烷、 (1 5 )交聯助劑：二甲基丙烯酸三乙二醇酯。 <探討> 如表1所示，相對於含有PTMG型熱可塑性聚胺'基甲 φ 酸酯彈性體40〜90重量％及乙烯-醋酸乙烯酯共聚物（醋酸 乙烯酯單位之含量=5 〇〜9 0重量％ ) 1 0〜6 0重量％之樹脂 成分100重量份，利用以40〜250重量份之比例含有平均 粒徑0 · 8 μιη且利用胺基烷耦合劑表面處理過之合成氫氧化 鎂的難燃性樹脂組成物所被覆的可撓性扁平電纜（實施例 1〜4 )，其係顯示於UL規格之垂直燃燒試驗VW-1中合格 的高度難燃性，顯示絕緣被覆層（絕緣體）之拉伸強度爲 10. OMPa以上且拉伸斷裂伸度爲100%以上，1 13°C xl 68小 時老化後的拉伸強度之殘率爲75%以上且拉伸斷裂伸度之 -30- 200832450 殘率爲75 %以上，即使於加熱變形試驗中，也顯示殘率爲 5 0%以上，得知所有之特性均合格。另外，此等絕緣電線， 即使於低溫特性試驗中，絕緣被覆內也不會出現裂痕，得 知合格。. 得知使用己二酸酯型熱可塑性聚胺基甲酸酯彈性體以 取代該PTMG型熱可塑性聚胺基甲酸酯彈性體之情形（實 施例5及6 )或聚碳酸酯型熱可塑性聚胺基甲酸酯彈性體 i 之情形（實施例7 )，得知可以得到於包含UL規格之垂直 燃燒試驗VW-1的所有特性均合格之可撓性扁平電纜。 使用平均粒徑爲3 μπι且利用胺基矽烷耦合劑處理過的 天然氫氧化鎂以取代上述合成氫氧化鎂之情形（實施例 8 )，得知可以得到於包含UL規格之垂直燃燒試驗VW-1 均合格的所有特性之可撓性扁平電纜。 〔比較例1〜1 0〕 除了使用具有顯示於表2之摻合配方的樹脂組成物以 φ 外，進行相同於實施例1〜8之方式後而製作絕緣電線。但 是，於比較例8中’摻合有機過氧化物0.04重量份與交聯 助劑0.08重量份後而製得具有熱交聯後之絕緣被覆的可撓 性扁平電纜。將結果顯示於表2。 -31- 200832450[I撇] Example oo 60 40 120 15 Qualified 13.0 150 oo OO 00 cn v〇 Qualified Bu 50 50 130 30 Qualified 12.9 180 CN os oo s Qualified 60 40 160 25 Qualified 15.0 110 mo ON OS m ON Qualified IT) 60 40 150 25 Qualified 13.3 155 ^ 〇OO ON 00 Qualified inch III 沄丨丨II I ^ 1 ? 1 1 1 55 Qualified 18.0 220 oo ON OO o 00 Qualified 70 30 250 33 Qualified 10.8 110 卜 w 00 oo vn On Qualified CN 40 60 150 20 Qualified 11.0 140 ON (N OO OS σ\ qualified rH 90 10 180 42 qualified 16.0 130 ^ (N ON On as qualified OOOOOOooOOqOq^q^ <<<<<<<<<<; Family II II II II 11 II II II ii ; The thief _ side gift bottle also gives 〇〇 ^ sterol® ® 1S酲龌酲II 11 !| »->>->·-> ^ y> ^ D Ο to white ρ & D to & Μ Μ M r S5 Sij Dh BtJ Ph aQI ain SI 幼卿' 狮狮纹 I 〇H 〇 HI ^ ^ ^ τ s _ _ s ^ s , « « 55 K ^ M i —. /-^v S /^NN /—S rN Ο « rwtp CN CO inch~*(Nm inch ιοόγ^οο — — l®p t-η i—it—* , ~i CL· / V—^ NW/ > SW^ 'S^/ HS collar 3 m S system Γ H iH drop 1 < 1 > 篇 m Continued jk _ "c? fi mmt: Tight i5i έ /^N Step on g M 鲧i: 幽 M 刑^ 鲥》 mm Dare to record feua eg _ x Most P if Heat deformation residual ratio (%) Low temperature characteristics 丨 OOCN- 200832450 (Note) (1) Adipate type TPU (JIS hardness = A80): The soft segment is an adipate type, and the Π S hardness is A 8 0 Thermoplastic polyurethane elastomer, (2) PTMG type TPU (JIS hardness = A80): the soft segment is a polybuttylene glycol type, and the JIS hardness is A80 thermoplastic polyurethane elasticity Body, (3) 卩 (: type ding? 11 («113 hardness = eight 80): the soft segment is polycarbonate type, and the JIS hardness is A80 thermoplastic polyurethane elastomer, (4) PTMG type TPU (JIS hardness = A85): soft segment is poly A butyl diol type, and a thermoplastic polyurethane sizing agent having a JIS hardness of A85, (5) ? <3 type butyl? 1; (〖18 hardness = eight 85): the soft segment is polycarbonate type, and the JIS hardness is A85 thermoplastic polyurethane elastomer, (6) adipate type TPU (JIS hardness = A85) : The soft segment is an adipate type, and the JIS hardness is A85 thermoplastic polyurethane elastomer, (7) adipate type TPU (JIS hardness = A97) • Soft segment is A diester type, and a thermoplastic polyurethane sizing agent having a JIS hardness of A97, (8) ? 11 (113 hardness = eight 98): the soft segment is a polybuttylene glycol type, and the JIS hardness is A98 thermoplastic polyurethane elastomer, (9) EVA-1: vinyl acetate unit content is 90% by weight of EB-29-200832450 olefin-vinyl acetate copolymer [Mooney viscosity (ML 1+ 4, 100 °C) = 28], (10) EVA-2: content of vinyl acetate unit 50% by weight of ethylene-vinyl acetate copolymer [Muniton viscosity (ML1+4, 1〇〇.〇) = 27], (1 1 ) EVA-3 Vinyl acetate unit content of 41% by weight of ethylene - Vinyl acetate copolymer (MFR 2g/10min), (12) Synthetic magnesium hydroxide: average particle size = 〇.80111, 6£1' specific surface area = 6m2, g, amino decane treated product, synthesis Products, (13) Natural Magnesium Hydroxide: Average Particle Size = 3μπ1, Aminodecane Treated, Natural (14) Organic Peroxide: 2,5-Dimethyl-2,5-di (Third Butyl Peroxide) hexane, (15) crosslinking assistant: triethylene glycol dimethacrylate. <Exploration> As shown in Table 1, 40 to 90% by weight and ethylene-vinyl acetate copolymer (content of vinyl acetate unit = 5) of the thermoplastic polyamide-containing phthalate elastomer containing PTMG type 〇~90% by weight) 100% by weight of the resin component 100 parts by weight of the resin component having an average particle diameter of 0·8 μm and a surface treated with an aminoalkane coupling agent in a ratio of 40 to 250 parts by weight A flexible flat cable (Examples 1 to 4) covered with a flame retardant resin composition of magnesium hydroxide, which exhibits high flame retardancy which is acceptable in the vertical burning test VW-1 of UL specification, and shows an insulating coating. The tensile strength of the layer (insulator) is 10. OMPa or more and the tensile elongation at break is 100% or more, and the residual strength of the tensile strength after aging at 13 ° C x 18 hours is 75% or more and tensile elongation at break. -30- 200832450 The residual rate is 75% or more. Even in the heat deformation test, the residual rate is 50% or more, and all the characteristics are found to be acceptable. In addition, in these insulated wires, even in the low-temperature characteristic test, cracks did not occur in the insulating coating, and it was found to be acceptable. It is known that the use of an adipate type thermoplastic polyurethane elastomer to replace the PTMG type thermoplastic polyurethane elastomer (Examples 5 and 6) or polycarbonate type thermoplasticity In the case of the polyurethane elastomer i (Example 7), it was found that a flexible flat cable having all the characteristics of the vertical burning test VW-1 including the UL standard was obtained. When the natural magnesium hydroxide having an average particle diameter of 3 μm and treated with an amino decane coupling agent was used instead of the above-mentioned synthetic magnesium hydroxide (Example 8), it was found that it was possible to obtain a vertical burning test VW containing UL specifications. 1 Flexible flat cable of all characteristics that are qualified. [Comparative Examples 1 to 10] Insulation wires were produced in the same manner as in Examples 1 to 8 except that the resin composition having the blending formulation shown in Table 2 was used in the same manner as in Examples 1 to 8. However, in Comparative Example 8, '0.04 parts by weight of the organic peroxide and 0.08 parts by weight of the crosslinking assistant were blended to obtain a flexible flat cable having heat-crosslinked insulating coating. The results are shown in Table 2. -31- 200832450
【<Ν撇】 比較例 ο 70 30 150 牛皮紙 燃燒 不合格 1 1 1 1 1 1 On 30 70 120 1 1 1 ^ 1 1 1 1 ΟΟ 60 40 100 0.04 0.08 牛皮紙 燃燒 不合格 14.8 180 cn — ON 〇\ S； 1合格1 t> 1 ~~ 60 40 120 30 合格 1 ^ 1 1 1 1 VO 55 45 260 9 合格 2 ^ I> o 卜 v〇 ON OO 1合格1 ! ^ I 1 1 1 1 1 沄 1 1 Sill 牛皮紙 燃燒 不合格 14.2 169 O ON ON OO I> OO 合格 寸 1 § 1 1 1 1 1 1 丨丨？ §111 牛皮紙 燃燒 不合格 〇 〇 • 1—Η r-4 熔融 o 合格1 30 70 220 牛皮紙 燃燒 不合格 15.5 145 寸 CN ON ON OO 〇\ 合格 CM - 100 200 20 合格 1 1 熔融 _ o 不合格 100 180 牛皮紙 燃燒 不合格 1 1 1 1 1 1 〇〇〇〇 〇〇〇〇〇〇〇〇(^a\ <<<<<<<< 家式家 II II II II II II II II % % % 3 ®酵喔tg酲龌龌 II II II 〇oc/)55〇q^c>ogoc/j < < <； 口 ggil； >>> 目 D iD 1 目 D ίτ, S： S： ^ !Γ, 5： ^ A3 S ''Η U Η O U ' H ；D— r4m 寸 卜 〇〇 ——匯―—一产 7 V^/ Ss^ S^/ Vs^ V^/ 、 Nw/ 'S^ 寸 … & S 領 cc S 盤 S 藝 1 > Μ ：i :W ，細 1? Oh ^ s ^ fi fi <n< ΠΤ is! m u * S i? Q m g 窜S i ^ 懲b 赠银 m m *®- SS eg 篇窗 lii x i： P 紹s ^ i »羞 :集世 Ϊ 激 ；Μ ;癒 '呂 低溫特性 ·ιί· 200832450 (註記） · 相同於表1之註記。 <探討> 單獨使用P TM G型熱可塑性聚胺基甲酸酯彈性體作爲 樹脂成分之情形（比較例1 )中，難燃性爲不足的。單獨 使用乙烯-醋酸乙烯酯共聚物（醋酸乙烯酯單位之含量=90 重量％)作爲樹脂成分之情形（比較例2 )中，加熱變形承 受性爲不合格的，即使於低溫特性試驗中，也於絕緣被覆 內形成裂痕，爲不合格的。 使用樹脂成分中之乙烯-醋酸乙烯酯共聚物（醋酸乙烯 酯單位之含量=90重量％ )之比例爲70重量％的樹脂組成 物之情形（比較例3 )中，難燃性爲不足的。 使用醋酸乙烯酯單位之含量爲41重量％之EVA-3作爲 乙烯-醋酸乙烯酯共聚物之情形（比較例4 )中，除了難燃 性爲不足之外，初期之拉伸強度較低，加熱變形殘率爲零。 氫氧化鎂之摻合比例過低之情形（比較例5 )中’延 燒至牛皮紙，於垂直燃燒試驗VW-1中不合格。氫氧化鎂 之摻合比例過高之情形（比較例6 )下，雖然於垂直燃燒 試驗VW- 1中合格，但是拉伸特性並不足。 使用JIS硬度爲A98之PTMG型熱可塑性聚胺基甲酸 酯彈性體作爲熱可塑性聚胺基甲酸酯彈性體之情形（比較 例7 )中，雖然於垂直燃燒試驗V W - 1中合格，但是絕緣被 覆層（絕緣體）之拉伸斷裂伸度將惡化至7 0 %。因此，針 對其他特性則略測定。 -33 - 200832450 使用醋酸乙烯酯單位之含量爲41重量％之EVA-3作爲 乙燒·醋酸乙嫌酯共聚物’並且，摻合有機過氧化物與交聯 助劑而予以熱交聯之情形（比較例8 )中’垂直燃燒試驗 V W -1爲不合格的。 將樹脂成分中之己二酸酯型熱可塑性聚胺基甲酸酯彈 性體（JIS硬度= A85)之重量比率設爲30重量％，將氫氧 化鎂之摻合比率設爲1 20重量％之情形（比較例9 )中’絕 緣被覆層（絕緣體）之拉伸斷裂伸度低於1 0 0 % ’機械物性 將惡化。因此，省略其他各種特性。 使用醋酸乙烯酯單位之含量爲41重量％之EVA-3作爲 乙烯-醋酸乙烯酯共聚物，並且，將樹脂成分中之聚碳酸酯 型熱可塑性聚胺基甲酸酯彈性體之重量比率提高至70重 量％之情形（比較例1 〇 )中，於垂直燃燒試驗VW-1中爲 不合格的。因此，省略其他各種特性之測定。 【產業上利用之可能性】 $ 本發明之可撓性扁平電纜能夠適用於電子機器等之機 內配線。 【圖式簡單說明】 第1圖係本發明之可撓性扁平電纜一例的剖面簡圖。 第2圖係本發明之可撓性扁平電纜較佳構造一例的說 明圖。 【元件符號說明】 10 可撓性扁平電纜 11 方形導體 -34- 200832450 12 絕 緣 被 覆 13 刻 痕 14 邊 緣 部 15 邊 緣 部 之 角 部 刻 痕 PO 中 心 點 Μ 邊 緣 部 之 寬 度 P 導 體 間 距 C 方 形 導 體 之 寬 度 G 各 方 形 導 體 間 之 間 隔 W 可 撓 性 扁 平 電 纜 之 全寬 -35 -[<Ν撇] Comparative Example ο 70 30 150 Kraft paper failed to burn 1 1 1 1 1 1 On 30 70 120 1 1 1 ^ 1 1 1 1 ΟΟ 60 40 100 0.04 0.08 Kraft paper failed to pass 14.8 180 cn — ON 〇 \ S; 1 qualified 1 t> 1 ~~ 60 40 120 30 qualified 1 ^ 1 1 1 1 VO 55 45 260 9 qualified 2 ^ I> o Bu v〇ON OO 1 qualified 1 ! ^ I 1 1 1 1 1 沄1 1 Sill Kraft paper failed to pass 14.2 169 O ON ON OO I> OO Qualified inch 1 § 1 1 1 1 1 1 丨丨? §111 Kraft paper failed to burn 〇〇• 1—Η r-4 fused o Qualified 1 30 70 220 Kraft paper failed to pass 15.5 145 inch CN ON ON OO 〇\ Qualified CM - 100 200 20 Qualified 1 1 Melt _ o Unqualified 100 180 Kraft paper failed to pass 1 1 1 1 1 1 〇〇〇〇〇〇〇〇〇〇〇〇(^a\ <<<<<<<<<> Home-style home II II II II II II II II % % % % 3 喔 酲龌龌 酲龌龌 II II II II II 〇 / ) ) ) ) og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og og 1目D ίτ, S: S: ^ !Γ, 5: ^ A3 S ''Η U Η OU ' H ; D- r4m 寸 〇〇 —— —— —— —— 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 Vs^ V^/ , Nw/ 'S^ inch... & S collar cc S disk S art 1 > Μ :i :W , fine 1? Oh ^ s ^ fi fi <n< ΠΤ is! mu * S i? Q mg 窜S i ^ punish b give silver mm *®- SS eg window lii xi: P s s ^ i » shame: 世世Ϊ 激; Μ ; ' 'Lu low temperature characteristics · ιί· 200832450 (Note) · Same as the notes in Table 1. <Exploration> In the case where the PTM G-type thermoplastic urethane elastomer was used alone as the resin component (Comparative Example 1), the flame retardancy was insufficient. In the case where the ethylene-vinyl acetate copolymer (content of vinyl acetate unit = 90% by weight) was used alone as the resin component (Comparative Example 2), the heat deformation resistance was unacceptable, even in the low-temperature property test. Cracks were formed in the insulating coating and were unacceptable. In the case of using a resin composition in which the ratio of the ethylene-vinyl acetate copolymer (content of vinyl acetate unit = 90% by weight) in the resin component was 70% by weight (Comparative Example 3), the flame retardancy was insufficient. In the case where EVA-3 having a vinyl acetate unit content of 41% by weight was used as the ethylene-vinyl acetate copolymer (Comparative Example 4), in addition to the insufficient flame retardancy, the initial tensile strength was low, and heating was performed. The deformation residual rate is zero. In the case where the blending ratio of magnesium hydroxide was too low (Comparative Example 5), it was delayed to kraft paper and was unacceptable in the vertical burning test VW-1. In the case where the blending ratio of magnesium hydroxide was too high (Comparative Example 6), although it was passed in the vertical burning test VW-1, the tensile properties were insufficient. In the case where a PTMG type thermoplastic polyurethane elastomer having a JIS hardness of A98 was used as the thermoplastic polyurethane elastomer (Comparative Example 7), although it was qualified in the vertical burning test VW-1, The tensile elongation at break of the insulating coating (insulator) will deteriorate to 70%. Therefore, other characteristics are slightly determined. -33 - 200832450 EVA-3 with a content of 41% by weight of vinyl acetate as the copolymer of ethylene bromide and ethyl acetate, and thermal crosslinking of organic peroxide and crosslinking aid (Comparative Example 8) The 'vertical burning test VW-1 was unacceptable. The weight ratio of the adipate type thermoplastic polyurethane elastomer (JIS hardness = A85) in the resin component was 30% by weight, and the blending ratio of magnesium hydroxide was set to 120% by weight. In the case (Comparative Example 9), the tensile fracture elongation of the insulating coating layer (insulator) was less than 100%, and the mechanical properties were deteriorated. Therefore, other various characteristics are omitted. EVA-3 having a vinyl acetate unit content of 41% by weight is used as the ethylene-vinyl acetate copolymer, and the weight ratio of the polycarbonate-type thermoplastic polyurethane elastomer in the resin component is increased to In the case of 70% by weight (Comparative Example 1 〇), it was unacceptable in the vertical burning test VW-1. Therefore, the measurement of other various characteristics is omitted. [Industrial Applicability] The flexible flat cable of the present invention can be applied to internal wiring of an electronic device or the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing an example of a flexible flat cable of the present invention. Fig. 2 is an explanatory view showing an example of a preferred structure of the flexible flat cable of the present invention. [Explanation of component symbols] 10 Flexible flat cable 11 Square conductor - 34 - 200832450 12 Insulation coating 13 Scoring 14 Edge portion 15 Corner portion of the edge portion of the score PO center point 宽度 Edge portion width P Conductor pitch C Square conductor Width G The spacing between the square conductors W The full width of the flexible flat cable -35 -