A7 4 6 6 79 5 ___B7_；__' 五、發明說明（j ) 〔發明所屬之技術領域〕 本發明係關於適用於鎳-鎘電池、.鎳-鋅電池：鎳-氫電池等的鹼性蓄電池之電池用隔板及其製造方法.。 〔先前技術〕 近幾年，，作爲電池用隔板,，聚丙烯等的聚烯烴系纖維 所構成之不織布是被滿意的採用著.，特別被提案出的有聚 烯烴系極紐纖維所構成的不織布經親水化處理而成之電池 用隔板。.例如，，本案申請人於日本專利特開平5 - 186911 號公報及特開平5 - 186964號公報中提案出一種纖維集合 體，.其含有60重量％以上之磺化聚烯烴系纖維.，該纖維是 在甲基戊烯系聚合物/聚烯烴系聚合物的組合所構成之分割 型複合纖維中導入磺基而成.。 又，.特開平7 - 147154號公報中提示出一種電池用隔 板，.係對由50.重量％以上的聚烯烴系分割型複合纖維構成 之水流絡合不織布施以乙烯基單體之接枝聚合.、磺化處理 等的親水化處理而成。.又特開平8 - 273654號公報中提示 出一種電池用隔板，.係對由50重量％的聚烯烴系極細纖維 構成、.且極細纖維彼此是形成部分的熔接之水流絡合不織 布：施以親水化處理而成.。 〔發明所欲解決之課題〕 然而:上述電池用隔板存在著以下的問題點：例如， 當使用特開平5 - 185911號公報及特開平5 - 186964號公報 之纖維集合體作爲電池用隔板.，:磺化處理後之不織布會有 強力變低的傾向，又成本變高，並無法令人滿意。又，特 4 .紙張尺度適用中關家標準(CNS)A4規格（210 X 297公爱) 一 (請先閱讀背面之注意事項再填窝本頁) 致 訂----------線 經濟部智慧財產局員工消費合作社邱製 經濟部智慧財產局員工消費合作社印製 4 6 β 79 5 Α7 __Β7__；_ 五、發明說明（L) 開平7 - 147154號公報之電池用隔板，.其主體是聚丙烯/聚 乙烯所構成之分割型複合纖維，.並藉由聚丙烯/低密度聚乙 烯的組合所構成之複合接著纖維來做熱接著：因此不織布 的強力低，無法高效率的施以親水化處理等等’造成其生 產性差，爲解決該問題而加以檢討之特開平8- 273654號 公報之電池用隔板：係將分割型複合纖維的1個成分之低 熔點極細纖維彼此熔接在一起後.，再進行分割及絡合^雖 在不織布的強力上有所改善，-但由於係讓極細纖維成分本 身做自我熔接，.要確保空隙會有困難.，因此基於保液性的 觀點尙稱不足， 本發明乃係有鑑於該等實際的情形，.其目的是提供一 電池用隔板，其具有優異的保液性及充分的不織布強度.， 不致降低電池壽命而能提高電池容量.；並提供經改良自我 放電性等之具有優異的電池性能之電池0 .爲達成前述目的之本發明的電池用隔板，其特徵在於, ，係以分割型複合纖維(A)及聚烯烴系複合纖維(B)等2種 纖維作爲/必要成分、.且視需要而含有第三合成纖維(C)之不 織布，.當構成纖維之合計量爲100重量％時：該分割型複 合纖維(A)或聚烯烴系複合纖維(B)之配合量分別不超過60 重量％，.且將該不織布施以親水化處理.；該分割型複合纖 維(A) \係以聚(4-甲基戊烯-1)或4-甲基戊烯-1.和其他 烯烴之共聚物所構成之甲基戊烯系共聚物爲第1成分.，以 和第1成分不同之聚烯烴系聚合物或其共聚物爲第2成分 Γ ，於纖維剖面將2成分配置成交鐯且鄰接：且將2成分中 X 297公釐） -----：----；--I ΧΛί i — — — —— — ---------^ 1\),, (請先閱讀背面之注意事項再填寫本頁) 466 79 5 經濟部智慧財產局員工消費合作杜印製 A7 B7 五、發明說明（3 ) 之至少1成分分割成1個以上；.該聚烯烴系複合纖維(B) 係由高熔點成分及低熔點成分所構成：藉由採用該構成 所得出之電池用隔板，'係具備優異的保液性及充分的不織 布強度，，且電池特性極優異·。 前述分割型複合纖維(A)之配合量：更佳爲5重量％以 .上55重量％以下的範圍.，特佳爲15重量％以上50重量％以 下的範圍。· . 前述聚烯烴系複合纖維(B)之配合量，.更佳爲5重量％ 以上55重量％以下的範圍、特佳爲15重量％以上50重量％ 以下的範圍。· 前述第三纖維(C)之配合量，較佳爲40重量％以下的 範圍。- 前述不織布較佳爲：不織布中之分割型複合纖維之2 構成成分的聚合物實質上不熔融.，而是藉由聚烯烴系複合 纖維之低熔點成分，、來將不織布的構成纖維熱熔接。 又，.不織布的構成纖維之纖維長，.若位於3〜25mm的 範圍，.可獲得緻密的不織布，.在保液性上極爲有利.。 前述不織布λ若採纖維長不同之纖維網所互相積層而 成之複合不織布，在增強不織布強度之表現上更爲理想,。 本發明的電池用隔板之較佳形態是在前述不織布之 至少一部分的層上積層其他薄片而成之複合片，.且將該複 合片施以親水化處理。、基於此；在提昇不織布強度、捲繞 性及耐短路性上較爲有利。 又本發明的電池用隔板之其他較佳費瓣形態是在 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝--------訂---------線. 經濟部智慧財產局員工消費合作社印製 166 795 A7 _____ B7____ 五、發明說明（f) 前述經親水化處理之不織布的至少一部分的層上積層其他 薄片而成,。 前述分割型複合纖維較佳爲，·以甲基戊烯系聚合物爲 第1成分，，以聚丙烯系聚合物爲第2成分）又：前述聚烯 烴系複合纖維較佳爲，.鞘成分爲高密度聚乙烯.、芯成分爲 聚丙烯之鞘芯型複合纖維。 又，·前述親水化處理：較佳爲磺化處理。.擴化處理中 ，若使用發煙硫酸處理、.氯磺酸處理：或硫酸酐處理中之 任一者在改良電池的自我放電性上較爲有利。又，磺化 度較佳爲0.4〜2重量％ ,。 ^ ,組裝入前述任一電池用隔板之電池.，能改良自我放電 性，.特別適用於電動車(PEV)及混合動力車(HEV),。 以下，、具體的說明本發明之內容,。 〔發明之實施形態〕 本發明所用之分割型複合纖維(A) 係以聚(4-甲基戊 烯-1)或4-甲基戊烯-1和其他烯烴之共聚物所構成之甲 基戊嫌系共聚物爲第1成分：以和第1成分不同之聚儲烴 系聚合物或其共聚物爲第2成分：於纖維剖面將2成分配 置成交錯且鄰接’，且將2成分中之至少1成分分割成丨個 以上’、其構成單位是在長方向呈^續，，全構成單位的一部 分係具有必定會露出纖維表面的剖面形狀.。具體而言，較 佳爲使用將第1成分及第2成分如圖1〜圖3般所排列者。 則述分割型複合纖維(A)的第1成分之甲基戊燦系聚 合物，·可列舉聚(4-甲基戊烯-丨)或4-甲基戊烯_丨和其 7 本紙張尺度適用中關家標^ (cNS)A4規格（210 X 297公釐） " --- (請先閱讀背面之注意事項再填寫本頁) 裝 訂·_ .線 1 6 6 79 5 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明（Γ) 他烯烴之共聚物、該共聚合所用之其他烯烴，，可列舉乙烯 、丙烯、.1 - 丁烯、·1 -戊烯、· 1 -己烯、,3 -甲基-1 - 丁烯 等等。. 前述分割型複合纖維(Α)的第2成分，.可使用聚乙烯 、聚丙烯、聚丁烯-1等不同於第1成分之聚烯烴系聚合 物或其共聚物，，其中以熔點(D2m)130°C以上、更佳爲15(TC 以上之聚烯烴系聚合物或其共聚物較佳。.前述第1成分及 第2成分所組合成之分割型複合纖維，·具優異的耐熱性， 即使對電池內過度激烈的反應，·也能充分的對應。.其中.， 最具效果的組合，.是以甲基戊嫌系聚合物爲第1成分.，以 聚丙烯系聚合物爲第2成分。 前述分割型複合纖維(A)中兩成分的分割數，.較佳爲 5〜20，兩成分的複合比.，基於紡紗製程上容易性的觀點.， 較佳爲第1成分：第2成分爲30 : 70〜70 : 30左右.。分割 型複合纖維(A)之纖度是以分割後各構成單位的纖度成爲 l~0.5dtex的方式來調整分割數或複合比以適當的決定出。 分割後各構成單位的纖度未滿O.ldtex時：在用發煙硫酸或 氯磺酸進行處理時會產生急劇的劣化，.不織布的強度將降 低，.故不佳。.超過0.5dtex時，和後述之複合纖維或合成纖 維的纖度差會變少，.將無法確保緻密的空隙？ 前述分割型複合纖維(A)佔本發明之電池用隔板的比 例，其範圍不超過60重量％，較佳爲5~55重量％，。更佳爲 15〜50重量％。若分割型複合纖維(A)的含量過少.，由於甲 基戊烯系聚合物的比例過少,，一定要在強親水性條件下才 (請先閲讀背面之注意事項再填寫本頁) 訂---------線. A7 6 79 5 _____B7_ 五、發明說明（4 ) 能導入足夠的親水基，將造成不織布強度的降低，.或成本 會變高？若超過60重量％，.親水化處理後的不織布強度會 有降低的傾向，·又成本會變高.。 其次，·本發明所用之高熔點成分及低熔點成分構成之 聚烯烴系複合纖維(B)，·係使用聚乙烯、聚丙烯、聚丁烯-.1、.聚-4 -甲基戊烯-1.、乙烯-乙烯醇共聚物等的聚烯烴 系聚合物或其共聚物。.設高熔點成分之熔點爲Blm :低熔 點成分之溶點爲B2m.，則低溶點成分較佳爲滿足以下關係 〇 (1) Blm>B2m. (2) 120〇C<B2m<D2m . 滿足上述關係之聚烯烴系複合纖維(B)，.例如可列舉 高密度聚乙烯/聚丙烯、.乙烯-丙烯共聚物/聚丙烯等，·若使 用該等物，，因纖維強度優異、.2成分樹脂間的層間剝離少 、能獲得充分的溶接強度；故較佳.。 複合纖維的纖維形態並沒有特別的限定可列舉同心 圓或偏心之鞘芯型複合纖維.、並列型複合纖維·、或是將1 種以上的前述素材混合成之單一纖維.，剖面形狀可爲圓形 或各種變形等等。. 本發明中，.特別是高密度聚乙烯/聚丙烯的組合之同 心圓鞘芯型複合纖維.，因不織布熱處理時之加工溫度範圍 廣、·所得不織布的強度大：耐化學藥品性：耐氧化劣化性 優異：故較佳？ 又，.前述聚烯烴系複合纖維(B) %其範菌不超過60重 9 紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱) """ (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 、裝--------- 訂·！ ！1 — 線-----I L--------I--------- 經濟部智慧財產局貝工消費合作社印製 466 795 A7 B7 五、發明說明) 量％ 較佳爲5〜55重量％,。更佳爲20〜50重量％。.聚烯烴系 複合纖維的含量過少時，.無法獲得充分的不織布強度’超 過60重量％時’要確保空隙會變得困難，·其保液性將不足. 〇 又，，本發明之電池用隔板中.，視必要可混合第三合成 纖維(C)，.這時是以40重量％以下的範園來混合？更佳爲 2〇~40重量％。第三合成纖維的含量超過40重量％時.’親 水化處理的效果變差，.將無法獲得必要的性能.。例如.，爲 了確保纖維間所形成的空隙·，可使用纖度較分割型複合纖 維分割後的各構成單位大、.相同或小於聚烯烴系複合纖維 之合成纖維t又爲進一步提昇親水性，.可使用在樹脂中預 先混合有親水化劑等而成之合成纖維。，又，.第三合成纖維 ，.可選自在聚烯烴系複合纖維的熔融溫度下實質上不致熔 融者，可使用聚丙烯、·聚酯、.尼龍等汎用合成纖維卜其中 以纖度〇.5~5dtex、_纖維強度6〜15cN/dtex之聚丙烯纖維,， 基於耐化學藥品性高之觀點較佳？ 含有前述構成纖維而成之纖維網的形態.，可使用梳理 法、、氣流成網法等所得之乾式網、.濕式法所得之濕式網、 或熔噴法.、紡粘法等的直接法所得之長纖維網.。其中前述 構成纖維之纖維長3~25mm所形成之濕式網，基於能得出 均質網的觀點爲較佳:。更佳爲纖維長5〜15mm.。纖維長未 達3mm時，.後述之高壓水流處理時纖維將飛散.，纖維間的 纏結將變得不完全.，在製造上不佳，.超過25mm時,5特別 是以濕式抄紙法來製造不織布的情形.，漿液中纖維的分散 10 $紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） --------— — — IV Μ---------訂--------線 V {請先閱讀背面之注意事項再填寫本頁) 4 6 6 79 5 經濟部智慧財產局貝工消費合作杜印製 B7 五、發明說明（(f) 性變差而無法得出均一的不織布·。 這些纖維網，，能藉熱壓延處理、.熱風加工處理、高壓 水流處理等方法來處理·。這時較佳爲，，至少分割型複合纖 .維之2構成成分實質上不致熔融’·且能藉聚烯烴系複合纖 維的低熔點成分來做熱熔接。，此處’·所謂實質上熔融代表 .著，，並非藉熱壓接等而軟化成扁平狀.、而使纖維彼此密胃 在一起，.而是纖維的一部分完全熔融.。若構成纖維彼 藉聚烯烴系複合纖維的低熔點成分來做熱熔接，.將能 分割型複合纖維分割後所得極細纖維及其他合成纖維 隙，並使複合纖維的高熔點成分維持其強度來做熔接，，γ 織布強度的不均將變少、且能確保緻密的空隙.。' 又，，作爲其他不織布的形態，能在上述構成纖維 圍內適當的變更混合率來進行積層，.或將纖維長不同的纖 維網做積層來形成複合不織布。.例如.，後者的情形 前述纖維長3〜25mm的構成纖維之濕式抄紙法所得之纖維 網之至少一面’，積層上纖維長超過25mm之切段纖維梅成 的纖維網、'或是長纖維若將纖維長不同的纖維網彼此做 積層，短纖維長的纖維網將賦予緻密性，.長纖維長之纖維 網將賦予不織布強度的提昇’-而在組裝成電池時具優离的 生產性，故較佳。這些纖維網·’可以是梳理網等的未結合 網、.構成纖維的一部分藉接著劑或自我接著等來結合之^ 合不織布、或是藉針剌法、，高壓水流處理所纏結成之不織 布等任一形態。，作爲積層方法，·可在未結合網彼此之積層 後再將纖維彼此做纏結，.也能將至少一纖維網預先以上述 11 i n n n Λ n 1 ϋ ϋ ϋ ϋ -»_1^-eJ· ϋ ϋ ϋ ϋ ϋ ϋ ^1 I 線、 _ί\ ,ί (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱) 經濟部智慧財產局員工消費合作社印製 4 66 79 5 A7 B7 五、發明說明（，） 結合或纏結方法不織布化後做積層，.再使纖維彼此纏結,。 又，其他不織布的形態，可在前述不纖布的至少部分 層上積層其他板片？此處1可在前述不織布的至少部分層 上積層其他板片而預先製作出複合片後-，再施加親水化處 理，.或將前述不織布預先施以親水化處理後.，再在至少部 分層上積層其他板片。，此處所稱之其他板片代表著·，纖維 長3〜25mm之纖維所構成之濕式不織布：纖維長超過25mm 之纖維所形成的構成纖維之一部分藉接著劑或自我接著1等 來結合之結合不織布.、藉針剌法或高壓水流處理所纏結成 之不織布、.或是多孔性膜等等。若使用前述板片中之纖維 長3~25mm之纖維所構成之濕式不織布！可獲得低單位面 積重且貫通孔的發生比例少之不織布，.而能減輕電池之短 路率。.又，若使用纖維長超過25mm之纖維或多孔性膜.， 將能進一步提昇不織布的強度.。 前述其他板片的素材並沒有特別的限定，.可以是聚烯 烴系樹脂、·聚醯胺系樹脂、.聚酯系樹脂等等.。積層方法只 要能在至少部分層上積層上其他板片即可.，並沒有特別的 限定，本發明的不織布可在片面、或兩面上積層其他板片 ’也能在不織布間插入其他板片能將上述積層體做2層 以上的積層。_又，_有關上述積層體中各層間的結合方法並 沒有特別的限定.，例如I能藉高壓水流處理以預先製作出 本發明的不織布‘，經積層其他板片後，、再藉熱風或熱f昆等 的熱處理來結合,；也能將本發明的纖維網和其他板片預先 積層後，·再藉高壓水流處理來結合.。 · 12 本紙張尺度適用肀國國家標準（CNS)A4規格（210 X 297公釐） ------_--------^ ^----V----訂---------線 J' P (請先閱讀背面之注意事項再填寫本頁) 4 6 6 79 5 A7 --- ___ B7 五、發明說明（（0) 前述不織布或複合板片的單位面積重，.可依據纖維的 量來做調節’·較佳爲30〜100g/m2。.未達30g/m2時不織布的 強度低，.在正極和負極間易產生短路.，超過l〇〇g/m2時透氣 性等會降低： 又，.前述不織布或複合板片，、較佳爲被施加親水化處 理。，作爲親水化處理.，可列舉乙烯基單體之接枝共聚合處 理、.氟氣體處理 '.磺化處理、.電暈放電處理、.電漿處理等 等，.其中基於能改良電池的自我放電性之觀點一以磺化處 理爲佳。.作爲磺化處理，.可列舉濃硫酸處理、發煙硫酸處 理、.氯磺酸處理、，無水硫酸處理等等.，磺化處理中之發煙 硫酸處理、.氯磺酸處理、.無水硫酸處理，由於反應性高而 較易進行磺化處理，_故較佳。_又，.磺化度較佳爲0.4〜2重 量％ :更佳爲0.7-1.5重量％。磺化度未達0.4重量％時，，電 池之自我放電性的改良將不足，但超過2重量％時，.不僅 處理成本會增大：且會造成不織布的強度降低？親水化處 理，·基於生產性的考量以在不織布形成後再進行爲佳當 不織布爲積層體的情形，-對至少含有分割型複合纖維之不 織布實施親水化處理即可.。 接著說明本發明的電池用隔板之製造方法的一例·。本 發明的隔板之基材的不織布之製造方法，·以濕式抄紙法爲 佳，該濕式抄紙用通常的方法來進行即可.。首先將分割型 複合纖維15-60重量％乂聚烯烴系複合纖維20〜60重量％ -、 不超過40重量％之其他合成纖維予以混合’·以濃度成爲 0.01~0.6.重量％的方式分散於水中，調製成漿液.。這時加入 13 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁> .裝 訂------1!^· 經濟部智慧財產局員工消費合作社印製 4 6 6 7 9 5 A7 B7 五、發明說明αρ 少量的分散劑亦可。.漿液是用短網式、，圓網式 '或兩者所 組合成之抄紙機等來進行抄紙？接著、’若令聚烯烴系複合 纖維熔融，.以使纖維間做輕度的結合’.不織布的處理性將 提高，，故較佳.。聚烯烴系複合纖維之熔融·，可在抄紙過程 之乾燥處理時和乾燥同時進行，.又一旦製成濕式不織布後 再進行加熱處理亦可、。 又，.藉由聚烯烴系複合纖維的熔融而使纖維間做輕度 的結合，.以成爲形態安定化的狀態後，.施以高壓水流處理 ，.使得分割型複合纖維分割成極細纖維同時讓纖維間進行 纏結。.高壓水流處理，.是從以0.05〜0.5mm的間隔來設置孔 徑0.05〜0.5mm的孔口之噴嘴，.將水壓5〜20MPa之柱狀水流 朝不織布的表裏噴射1次以上1。所得之纏結不織布·，可在 120~D2m°C、.較佳爲130〜145°C乾燥.，同時藉聚烯烴系複合 纖維的低熔點成分來使構成纖維彼此做熱熔接.。A7 4 6 6 79 5 _B7_; __ 'V. Description of the invention (j) [Technical field to which the invention belongs] The present invention relates to alkaline storage batteries suitable for nickel-cadmium batteries, nickel-zinc batteries: nickel-hydrogen batteries, etc. Battery separator and manufacturing method thereof [Prior art] In recent years, non-woven fabrics made of polyolefin-based fibers such as polypropylene have been used satisfactorily as battery separators. In particular, they have been proposed to be made of polyolefin-based fibers. Non-woven fabric battery separator made by hydrophilic treatment. For example, the applicant of this case proposed a fiber aggregate in Japanese Patent Laid-Open No. 5-186911 and Japanese Patent Laid-Open No. 5-186964, which contains 60% by weight or more of a sulfonated polyolefin-based fiber. The fiber is made by introducing a sulfo group into a split composite fiber composed of a combination of a methylpentene polymer / polyolefin polymer. Also, Japanese Patent Application Laid-Open No. 7-147154 proposes a battery separator which is made of vinyl monomers for a water-flow-complexed nonwoven fabric composed of 50% by weight or more of a polyolefin-based split composite fiber. Branch polymerization, sulfonation treatment and other hydrophilization treatment. Also, Japanese Patent Application Laid-Open No. 8-273654 proposes a battery separator made of a water-flow-complexed non-woven fabric composed of 50% by weight of polyolefin-based ultrafine fibers, and the ultrafine fibers are part of each other. Made by hydrophilization ... [Problems to be Solved by the Invention] However, the above battery separator has the following problems. For example, when the fiber assembly of Japanese Patent Application Laid-Open No. 5-185911 and Japanese Patent Application Laid-Open No. 5-186964 are used as the battery separator . :: The non-woven fabric after sulfonation treatment tends to become weaker, and the cost becomes higher, which is not satisfactory. Also, special 4. Paper size is applicable to Zhongguanjia Standard (CNS) A4 specification (210 X 297 public love) One (Please read the precautions on the back before filling in this page) Order -------- -Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, Qiu System Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 4 6 β 79 5 Α7 __Β7__; _ V. Description of the Invention (L) Battery Separator of Kaiping 7-147154, The main body is a split composite fiber composed of polypropylene / polyethylene, and a composite bonding fiber composed of a combination of polypropylene / low-density polyethylene is used for thermal bonding: Therefore, the strength of the non-woven fabric is low and it cannot be highly efficient. The application of hydrophilization treatment, etc., caused poor productivity and was reviewed in order to solve this problem. The battery separator of JP-A-8-273654: a low-melting ultra-fine fiber composed of one component of a split composite fiber After being welded to each other, they are divided and complexed. ^ Although the strength of the non-woven fabric is improved,-because the ultra-fine fiber component itself is welded, it is difficult to ensure the gap. Therefore, it is based on liquid retention. Sexuality claims Insufficient, the present invention is in view of these practical situations. Its purpose is to provide a battery separator, which has excellent liquid retention and sufficient non-woven strength, and can increase battery capacity without reducing battery life; In addition, a battery with excellent battery performance, such as improved self-discharge properties, is provided. In order to achieve the foregoing object, the battery separator of the present invention is characterized in that it is divided into composite fibers (A) and polyolefin-based composites. Non-woven fabrics containing two types of fibers such as fiber (B) as necessary components, and containing a third synthetic fiber (C) as necessary. When the total amount of constituent fibers is 100% by weight: the split composite fiber (A) Or the compounding amount of the polyolefin-based composite fiber (B) each does not exceed 60% by weight, and the nonwoven fabric is subjected to a hydrophilization treatment; the split composite fiber (A) is made of poly (4-methylpentene) -1) or 4-methylpentene-1. A methylpentene-based copolymer composed of a copolymer with another olefin is the first component. It is a polyolefin-based polymer different from the first component or a copolymer thereof. The substance is the second component Γ, and the two components are arranged on the fiber cross section and are adjacent to each other. : And X 297 mm in 2 components) -----: ----; --I ΧΛί i — — — —— — --------- ^ 1 \) ,, (please (Please read the notes on the back before filling this page) 466 79 5 Consumption cooperation by employees of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed A7 B7 V. At least one component of the invention description (3) is divided into more than one; the polyolefin composite The fiber (B) is composed of a high-melting point component and a low-melting point component. By using this structure, the battery separator has excellent liquid retention and sufficient nonwoven strength, and has excellent battery characteristics. . The compounding amount of the split composite fiber (A) is more preferably in the range of 5% by weight or more and 55% by weight or less, and particularly preferably in the range of 15% by weight or more and 50% by weight or less. The blending amount of the polyolefin-based composite fiber (B) is more preferably in a range of 5% to 55% by weight, and particularly preferably in a range of 15% to 50% by weight. The blending amount of the third fiber (C) is preferably in a range of 40% by weight or less. -The non-woven fabric is preferably: the polymer of the two constituent components of the split type composite fiber in the non-woven fabric is not substantially melted, but the low-melting point component of the polyolefin-based composite fiber is used to thermally fuse the constituent fibers of the non-woven fabric . In addition, the fiber length of the constituent fibers of the non-woven fabric is in the range of 3 to 25 mm, and a dense non-woven fabric can be obtained, which is extremely advantageous in terms of liquid retention. The aforementioned non-woven fabric λ is more ideal for enhancing the strength of the non-woven fabric if a composite non-woven fabric formed by laminating fiber webs with different fiber lengths is used. A preferred form of the battery separator of the present invention is a composite sheet obtained by laminating other sheets on at least a part of the aforementioned non-woven fabric, and subjecting the composite sheet to a hydrophilic treatment. Based on this, it is more advantageous in improving the strength of the non-woven fabric, winding property and short-circuit resistance. The other preferred shape of the battery separator of the present invention is to apply the Chinese National Standard (CNS) A4 specification (210 X 297 mm) at 6 paper sizes (please read the precautions on the back before filling this page) Packing -------- Order --------- line. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 166 795 A7 _____ B7____ V. Description of the Invention (f) Hydrophilized non-woven fabric At least a part of the layer is formed by laminating other sheets. The split composite fiber is preferably a methylpentene-based polymer as the first component and a polypropylene-based polymer as the second component) and the polyolefin-based composite fiber is preferably a sheath component. Sheath-core composite fiber with high density polyethylene and polypropylene core. The hydrophilization treatment is preferably a sulfonation treatment. In the expansion treatment, if fuming sulfuric acid treatment or chlorosulfonic acid treatment: or sulfuric acid anhydride treatment is used, it is advantageous in improving the self-discharge property of the battery. The degree of sulfonation is preferably 0.4 to 2% by weight. ^ Batteries assembled into any of the aforementioned battery separators can improve self-discharge, and are particularly suitable for electric vehicles (PEV) and hybrid vehicles (HEV). Hereinafter, the content of the present invention will be specifically described. [Embodiments of the Invention] The split type composite fiber (A) used in the present invention is a methyl group composed of poly (4-methylpentene-1) or a copolymer of 4-methylpentene-1 and other olefins. Ethylene-based copolymers are the first component: a polymer-storage-based polymer or a copolymer different from the first component is the second component: the two components are arranged in a cross section adjacent to each other in the fiber section, At least one component is divided into more than one, and its constituent units are continuous in the long direction. A part of the entire constituent units has a cross-sectional shape that will inevitably expose the fiber surface. Specifically, it is preferable to use those in which the first component and the second component are arranged as shown in FIGS. 1 to 3. As the first component of the pentane-based polymer of the split composite fiber (A), poly (4-methylpentene- 丨) or 4-methylpentene_ 丨 and 7 sheets thereof Standards apply to Zhongguanjia standard ^ (cNS) A4 specification (210 X 297 mm) " --- (Please read the precautions on the back before filling in this page) Binding · _. Line 1 6 6 79 5 A7 B7 Ministry of Economy Wisdom Printed by the Consumers' Cooperative of the Property Bureau V. Description of the Invention (Γ) Copolymers of other olefins and other olefins used in the copolymerization include ethylene, propylene, .1-butene, · 1-pentene, · 1- Hexene, 3-methyl-1 -butene, and the like. As the second component of the aforementioned split type composite fiber (A), a polyolefin polymer or a copolymer other than the first component such as polyethylene, polypropylene, and polybutene-1 may be used. D2m) 130 ° C or higher, more preferably 15 (TC or higher polyolefin-based polymer or copolymer thereof. The split type composite fiber composed of the aforementioned first component and the second component has excellent heat resistance It can respond to excessively intense reactions in the battery. Among them, the most effective combination is based on methylpentamyl polymer as the first component, and polypropylene polymer. It is the second component. The number of divisions of the two components in the aforementioned split type composite fiber (A) is preferably 5 to 20, and the composite ratio of the two components is from the viewpoint of easiness in spinning process. 1 component: The second component is about 30: 70 to 70: 30. The fineness of the split composite fiber (A) is such that the fineness of each constituent unit after the split becomes 1 to 0.5 dtex. Appropriately determined. When the fineness of each constituent unit after division is less than O.ldtex: When using fuming sulfuric acid or chlorosulfur When processing, sharp deterioration will occur, and the strength of the nonwoven fabric will be lowered, so it is not good. When it exceeds 0.5 dtex, the difference in fineness between the composite fiber and synthetic fiber described below will be reduced, and dense voids will not be ensured? The ratio of the aforementioned split type composite fiber (A) to the battery separator of the present invention ranges from 60% by weight, preferably from 5 to 55% by weight, and more preferably from 15 to 50% by weight. The content of fiber (A) is too small. Because the proportion of methylpentene-based polymers is too small, it must be under strong hydrophilic conditions (please read the precautions on the back before filling this page) Order ----- ---- Line. A7 6 79 5 _____B7_ V. Description of the invention (4) Can introduce enough hydrophilic groups, which will cause the reduction of the strength of the non-woven fabric, or the cost will increase? If it exceeds 60% by weight, after the hydrophilization treatment The strength of the nonwoven fabric tends to decrease, and the cost increases. Secondly, the polyolefin-based composite fiber (B) composed of the high-melting point component and the low-melting point component used in the present invention, uses polyethylene and polypropylene. , Polybutene-.1, .poly-4 -methylpentene-1, ethylene- Polyolefin polymers such as enol copolymers or copolymers thereof. Let the melting point of the high melting point component be Blm and the melting point of the low melting point component be B2m., The low melting point component preferably satisfies the following relationship. (1 ) Blm > B2m. (2) 120 ° C < B2m < D2m. Polyolefin-based composite fibers (B) satisfying the above relationship. Examples include high-density polyethylene / polypropylene, ethylene-propylene copolymer / polypropylene Etc. If these materials are used, it is preferable because they have excellent fiber strength, less interlayer peeling between .2 component resins, and sufficient bonding strength can be obtained. The fiber shape of the composite fiber is not particularly limited. Examples include concentric or eccentric sheath-core composite fibers, side-by-side composite fibers, or a single fiber obtained by mixing one or more of the aforementioned materials. The cross-sectional shape may be Round or various deformations and so on. In the present invention, particularly the high-density polyethylene / polypropylene combination of concentric circular sheath-core composite fibers. Because the processing temperature range of the non-woven fabric during the heat treatment is wide, the strength of the obtained non-woven fabric is large: chemical resistance: resistant Excellent oxidative degradation: Is it better? In addition, the aforementioned polyolefin-based composite fibers (B)% are not more than 60% in weight. 9 Paper size applies to China National Standard (CNS) A4 specifications (210 X 297 public love) " " " (Please read the back first Please pay attention to this page before filling in this page) Printed and installed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs --------- Order! !! 1 — Line ----- I L -------- I --------- Printed by Shellfish Consumer Cooperative of Intellectual Property Bureau, Ministry of Economy 466 795 A7 B7 V. Description of the invention It is preferably 5 to 55% by weight. More preferably, it is 20 to 50% by weight. When the content of the polyolefin-based composite fiber is too small, it is not possible to obtain sufficient nonwoven fabric strength (when it exceeds 60% by weight). It is difficult to ensure voids, and the liquid retention thereof is insufficient. 〇 Also, the battery for the present invention If necessary, the third synthetic fiber (C) can be mixed in the separator. In this case, is it blended in a range of 40% by weight or less? More preferably, it is 20 to 40% by weight. When the content of the third synthetic fiber exceeds 40% by weight, the effect of the hydrophilization treatment is deteriorated, and the necessary performance cannot be obtained. For example, in order to ensure the space formed between the fibers, a synthetic fiber t having a fineness larger than each constituent unit after the split-type composite fiber is divided, which is the same as or smaller than the polyolefin-based composite fiber, can be used to further improve the hydrophilicity. Synthetic fibers obtained by mixing a hydrophilic agent or the like in the resin in advance can be used. The third synthetic fiber may be selected from those which do not substantially melt at the melting temperature of the polyolefin-based composite fiber. Polypropylene, polyester, nylon and other general-purpose synthetic fibers may be used. The fineness is 0.5. ~ 5dtex, polypropylene fiber with a fiber strength of 6 ~ 15cN / dtex, is it better from the viewpoint of high chemical resistance? The form of the fiber web containing the aforementioned constituent fibers can be a dry web obtained by a carding method, an airlaid method, a wet web obtained by a wet method, or a meltblown method, a spunbond method, or the like. Long fiber web obtained by direct method ... Among them, the wet type net formed by the fiber length of 3 to 25 mm mentioned above is preferably based on the viewpoint that a homogeneous net can be obtained. More preferably, the fiber length is 5 to 15 mm. When the fiber length is less than 3mm, the fibers will scatter during the high-pressure water flow process described below, and the entanglement between the fibers will become incomplete. When the fiber length exceeds 25mm, 5 is especially the wet papermaking method. To make non-woven fabrics, the dispersion of fibers in the slurry is 10 $ Paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) --------—— — — IV Μ ----- ---- Order -------- Line V (Please read the notes on the back before filling in this page) 4 6 6 79 5 DuPont B7, Intellectual Property Cooperation, Intellectual Property Bureau, Ministry of Economic Affairs ((F) Deterioration of properties makes it impossible to obtain uniform nonwoven fabrics. These fiber webs can be processed by methods such as hot calendering, hot air processing, and high-pressure water flow processing. At this time, it is preferable to divide at least Type composite fiber. The component of dimension 2 does not substantially melt ', and can be thermally welded by the low melting point component of the polyolefin-based composite fiber. Here, the so-called "substantially melted" means that it is not by heat pressing. In turn, it softens into a flat shape, and the fibers are closely packed with each other, but a part of the fibers is completely melted. If the constituent fibers are thermally welded by the low melting point component of the polyolefin-based composite fiber, the ultra-fine fibers and other synthetic fiber gaps obtained after the splittable composite fiber is divided, and the high melting point component of the composite fiber will maintain its strength. Welding, the unevenness of the strength of the γ-woven fabric will be reduced, and dense voids can be ensured ... 'Also, as another form of non-woven fabric, the mixing ratio can be appropriately changed within the constituent fiber enclosure for lamination, or Laminate fiber webs with different fiber lengths to form a composite nonwoven fabric. For example, in the latter case, at least one side of the fiber web obtained by the wet papermaking method of the fiber having a fiber length of 3 to 25 mm, and the fiber length on the laminate exceeds 25 mm. The fiber web formed by the cut fibers, or long fibers. If the fiber webs with different fiber lengths are laminated to each other, the short fiber long web will give denseness. The long fiber long web will give the strength of the non-woven fabric. It is better to improve '-and it has excellent productivity when assembled into a battery, so it is better. These fiber webs can be unbonded webs such as carding nets, etc. Any combination of non-woven fabrics combined with adhesives or self-adhesion, or non-woven fabrics entangled by needle stitching or high-pressure water treatment. As a lamination method, it can be used after lamination of unbonded nets. Then the fibers are tangled with each other. At least one fiber web can also be prepended with the above 11 innn Λ n 1 ϋ ϋ ϋ ϋ-»_ 1 ^ -eJ · ϋ ϋ ϋ ϋ ϋ ϋ1 I line, _ί \, ί (Please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297 public love) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Consumer Cooperatives 4 66 79 5 A7 B7 V. Description of the invention The (,) bonding or entanglement method is not laminated and then laminated, and then the fibers are entangled with each other. Also, for other forms of non-woven fabric, other sheets can be laminated on at least a part of the aforementioned non-woven fabric? Here, 1 can be made by laminating other sheets on at least part of the aforementioned non-woven fabric to prepare a composite sheet in advance, and then applying a hydrophilizing treatment, or after the aforementioned non-woven fabric is subjected to a hydrophilizing treatment in advance, and then in at least part of the layer Laminate other plates. The other plates referred to here represent · Wet nonwoven fabrics composed of fibers with a fiber length of 3 to 25 mm: a part of the constituent fibers formed by fibers with a fiber length of more than 25 mm is combined by an adhesive or self-adhesive 1 Combining non-woven fabrics, non-woven fabrics entangled by needle stitching or high-pressure water flow treatment, or porous membranes, etc. If you use the wet non-woven fabric made of fibers with a length of 3 ~ 25mm in the aforementioned plate! A non-woven fabric with a low unit area and a small proportion of through holes can be obtained, and the short circuit rate of the battery can be reduced. In addition, if a fiber or a porous film with a fiber length of more than 25mm is used, the strength of the nonwoven fabric can be further improved. The material of the other plates is not particularly limited, and may be a polyolefin-based resin, a polyamide-based resin, a polyester-based resin, or the like. The lamination method is only required to laminate other plates on at least a part of the layer. There is no particular limitation. The non-woven fabric of the present invention can be laminated on one or both sides of the non-woven fabric. It is also possible to insert other plates between non-woven fabrics. The above-mentioned laminated body is laminated with two or more layers. _ Again, _ There is no particular limitation on the bonding method between the layers in the above-mentioned laminated body. For example, I can use a high-pressure water flow treatment to make the non-woven fabric of the present invention in advance. After laminating other plates, use hot air or It can also be combined with heat treatment such as heat, etc .; the fiber web of the present invention and other sheets can be laminated in advance, and then combined by high-pressure water flow treatment. · 12 This paper size applies the national standard (CNS) A4 (210 X 297 mm) ------_-------- ^ ^ ---- V ---- Order- -------- Thread J 'P (Please read the notes on the back before filling in this page) 4 6 6 79 5 A7 --- ___ B7 V. Description of the invention ((0) The aforementioned non-woven or composite sheet The weight per unit area can be adjusted according to the amount of fiber '. It is preferably 30 ~ 100g / m2. When the strength is less than 30g / m2, the strength of the non-woven fabric is low, and a short circuit is easily generated between the positive electrode and the negative electrode, exceeding l 〇〇g / m2, air permeability and the like will be reduced: Also, the aforementioned nonwoven fabric or composite sheet is preferably subjected to a hydrophilization treatment. As the hydrophilization treatment, graft copolymerization of vinyl monomers may be mentioned Treatment, fluorine gas treatment ', sulfonation treatment, corona discharge treatment, plasma treatment, etc. Among them, the sulfonation treatment is preferred based on the viewpoint of improving the self-discharge property of the battery. As the sulfonation treatment Examples include concentrated sulfuric acid treatment, oleum treatment, chlorosulfonic acid treatment, anhydrous sulfuric acid treatment, etc., fuming sulfuric acid treatment in sulfonation treatment, chlorosulfonic acid treatment, and anhydrous sulfuric acid treatment. Because of its high reactivity, sulfonation treatment is easier, so it is better. And, the degree of sulfonation is preferably 0.4 to 2% by weight: more preferably 0.7-1.5% by weight. The degree of sulfonation is less than 0.4% by weight At this time, the improvement of the battery's self-discharge performance will be insufficient, but if it exceeds 2% by weight, not only the processing cost will increase: but also the strength of the nonwoven fabric will be reduced? Hydrophilic treatment, based on productivity considerations to form in the nonwoven fabric In the case where the non-woven fabric is a laminated body, the non-woven fabric containing at least a split type composite fiber may be subjected to a hydrophilizing treatment. Next, an example of a method for manufacturing a battery separator of the present invention will be described. The method for manufacturing the non-woven fabric of the base material of the separator is preferably a wet papermaking method. The wet papermaking can be performed by a normal method. First, split the composite fiber 15 to 60% by weight of a polyolefin-based composite. Fiber 20 ~ 60% by weight-Other synthetic fibers not more than 40% by weight are mixed '· Dispersed in water in a concentration of 0.01 ~ 0.6.% By weight to prepare a slurry ... At this time, 13 paper sizes are added for China National Standard (CNS) A4 Specification (210 X 297 mm) (Please read the precautions on the back before filling in this page>. Binding ----- 1! ^ · Printed by the Employees' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 4 6 6 7 9 5 A7 B7 V. Description of the invention ααρ A small amount of dispersant may be used .. Is the slurry used for short paper type, rotary screen type, or a papermaking machine made of a combination of both to make paper? Then, ' If the polyolefin-based composite fibers are melted so as to make a slight bond between the fibers, the handleability of the nonwoven fabric will be improved, so it is better. The melting and melting of polyolefin-based composite fibers can be performed at the same time as the drying process in the papermaking process. Once it is made into a wet nonwoven fabric, it may be heated. In addition, by melting the polyolefin-based composite fibers, the fibers are lightly bonded to each other to form a stable state, and then subjected to high-pressure water flow treatment to divide the split-type composite fibers into ultrafine fibers. Let the fibers tangle. The high-pressure water flow treatment is to spray nozzles with orifices having a diameter of 0.05 to 0.5 mm at intervals of 0.05 to 0.5 mm, and spray a columnar water flow with a water pressure of 5 to 20 MPa into the surface of the nonwoven fabric more than once. The obtained entangled non-woven fabric can be dried at 120 to D2m ° C, preferably 130 to 145 ° C. At the same time, the low melting point component of the polyolefin-based composite fiber is used to thermally weld the constituent fibers to each other.
之後.，將不織布浸漬於發煙硫酸反應槽.、氯磺酸反應 槽、.或是無水硫酸反應槽中，.以導入磺基。磺化處理條件 ，係以磺化度成爲0.4〜2重量％的方式做適當的設定：例如 ，在無水硫酸處理的情形，.以三氧化硫的氣體濃度10〜80 體積％、反應溫度10〜90°C.、反應時間10〜600秒的條件來 處理即可。.這時，.爲促進磺化，。用紫外線或放射線將不織 布表面活性化後.，施以磺化處理亦可.V 又，-在對不織布施以親水化處理後，藉浸漬法、噴塗 法'輥子接觸法等來將親水性界面活性劑做均一的附著亦 可，.組合其他的親水化處理法亦可9之後進行熱壓延處理 14 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ，裝 ----訂-----—線 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 4 6 6 795 A7 _ B7 五、發明說明（/1) ，調整成既定厚度後，，即得出本發明的電池用隔板^ 〔實施例〕 以下.，茲列舉實施例來說明本發明的內容·。又！拉伸 強度，保液率.、短路率.、電容保存率.、周期壽命、、磺化度 ，係依據以下的方法來做測定。 .(1)縱向拉伸強度 依據；IIS L 1096，對不織布的縱方向，·將寬5cm \長 15cm的試片以夾持間隔爲10cm的方式把持住，.用定速伸 長型拉伸試驗機以拉伸速度30cm/分來實施伸長，，以切斷 時的荷重値作爲拉伸強度.。 (2) 保液率· 將試片之水分平衡狀態下的重量(W)測定到精度lmg 爲止？接著將試片浸入比重1.30之KOH溶液中’在吸收 KOH溶液1小時後從溶液中拉出.，放置1〇分鐘後.，測定 試片的重量(Wl) l保液率則根據保液率(％)=((W1 - W)/W) X100的式子來算出。 (3) 圓筒型密閉鎳氫電池 負極，.係將吸氫合金.、羯基鎳：竣甲基纖維素(CMC) 、聚四氟乙烯(PTFE)加入水中進行混煉而調整成漿液·。將 鍍鎳之衝孔金屬浸漬於該漿液以實施塗佈後，.於8CTC做乾 燥，·經加壓成型而製作出吸氫合金負極？正極，則是使用 公知的燒結型鎳極？在上述負極、正面間夾入各隔板並插 入電槽罐內，.注入電解液後.，即製作出圓筒型密閉鎳氫電 池 15 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） . ^ '. ../V. (請先閱讀背面之注意事項再填寫本頁) -^-°After that, the nonwoven fabric is immersed in a fuming sulfuric acid reaction tank, a chlorosulfonic acid reaction tank, or an anhydrous sulfuric acid reaction tank to introduce a sulfo group. The sulfonation treatment conditions are appropriately set such that the degree of sulfonation becomes 0.4 to 2% by weight: for example, in the case of anhydrous sulfuric acid treatment, the concentration of sulfur trioxide is 10 to 80% by volume, and the reaction temperature is 10 to It can be processed under the conditions of 90 ° C. And a reaction time of 10 to 600 seconds. At this time, to promote sulfonation. After activating the surface of the non-woven fabric with ultraviolet or radiation, sulfonation treatment is also possible. V Also,-After the non-woven fabric is subjected to a hydrophilization treatment, the hydrophilic interface is immersed by a dipping method, a spray method, or a roller contact method. Uniform attachment of active agents is also possible. Combination of other hydrophilization treatment methods can also be followed by hot calendering treatment. 14 This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read first Note on the back, fill in this page again), ---------------- Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumers ’Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 4 6 6 795 A7 _ B7 5. Description of the invention (/ 1) After adjusting to a predetermined thickness, the battery separator of the present invention will be obtained ^ [Examples] The following examples are given to illustrate the content of the present invention. also! Tensile strength, liquid retention rate, short circuit rate, capacitance retention rate, cycle life, and degree of sulfonation are measured according to the following methods. (1) Longitudinal tensile strength basis; IIS L 1096, for the longitudinal direction of the non-woven fabric, hold a test piece with a width of 5cm and a length of 15cm with a clamping interval of 10cm, and use a constant speed extension type tensile test The machine performs elongation at a tensile speed of 30 cm / minute, and uses the load at the time of cutting as the tensile strength. (2) Liquid retention rate • Measure the weight (W) of the test piece in the water balance state to an accuracy of 1 mg? Then immerse the test piece in a KOH solution with a specific gravity of 1.30 'and pull it out of the solution after absorbing the KOH solution for 1 hour. After 10 minutes of standing, determine the weight of the test piece (Wl). (%) = ((W1-W) / W) X100. (3) Cylindrical sealed nickel-metal hydride battery negative electrode is made of hydrogen-absorbing alloy, fluorene-based nickel: finished methylcellulose (CMC), polytetrafluoroethylene (PTFE), and mixed with water to adjust the slurry. . After immersing the nickel-plated punched metal in the slurry to perform coating, dry it at 8CTC, and make a hydrogen-absorbing alloy negative electrode by press molding? For the positive electrode, a known sintered nickel electrode is used? Between the negative electrode and the front surface, sandwich each separator and insert it into the tank. After the electrolyte is injected, a cylindrical sealed nickel-metal hydride battery is produced. The paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm). ^ '. ../V. (Please read the notes on the back before filling this page)-^-°
45 § 79 5 A7 B7 五、發明說明（A)) (4) 電容保存率 將前述製作出的圓筒型密閉鎳氫電池，，以充電0.1C 率12小時.、休息0.5小時.、放電0.1C率終止電壓爲1.0V 爲1個周期.，重覆實施10個周期的充放電，.以進行電池的 初活性化,。 於進行初活性化後，以充電0.1C率12小時.、休息0.5 小時、.放電0.1C率終止電壓爲1.0V爲1個周期.，相對於 重覆實施5個周期的充放電後之放電容量：把同條件(0.1C 率)充電後Λ於45°C下放置14天後之殘存電容(〇.1C率放電 、-終止電壓1.0V)之比値當作自我放電後的電容保存率。充 放電是在25°C下進行.。. (5) 短路率· 組裝出100個圓筒型密閉鎳氫電池後：以產生短路的 比例當作短路率.。 ^ (6) 周期壽命， 對進行初活性化後之圓筒型密閉鎳氫電池，以充電 0.1C率1〇小時：休息〇.5小時、.放電〇.ic率(終止電壓 L0V)爲1個周期.，求出相對於理論電容之利用率成爲90% 以下時之周期數。充放電是在25〇C下進行。. ⑺磺化度. 從試料裁出5cmX5cm的試片，.浸漬於13%K〇H水溶 液中30分鐘。、之後·，用自來水洗淨30分鐘，再用純水洗 淨30分鐘後：於60°C下乾燥1小時而得出調整後的試料.。 接著’、使用螢光X射線測定裝置-，測定不織布中硫元素的 16 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ---— II 訂----I----. 經濟部智慧財產局員.工消費合作社印製 經濟部智慧財產局員工消費合作社印製 79 5 A7 Λ __ _ Β7 五、發明說明（/y) 濃度，.除上全元素濃度再乘上100倍，.即得出磺化度/ (8)纖維之準備 作爲原料，.係準備出以下的纖維。.下述纖維中.，相當 .於分割型複合纖維(A)爲纖維1、.纖維2 :纖維8。。相當於聚 烯烴系複合纖維(B)爲纖維3~5，.相當於第三合成纖維(C)爲 纖維6和7.。 〔纖維1〕第1成分是用熔點(Dlm)240°C之甲基戊烯系共聚 物(三井化學(股)製）：第2成分是用熔點卬2111)163°(：之聚丙 儲(日本Polychem(股)製).’複合比50 : 50 具備圖1所示的 纖維剖面之纖度2.3dtex、.纖維長6mm之分割型複合纖維。 〔纖維2〕第1成分是用熔點(Dlm)240°C之甲基戊烯系共聚 物(三井化學(股)製)：第2成分是用熔點(D2m)163°C之聚丙 燦（日本Polychem(股)製）.’複合比50 50 _，具備圖1所示的 纖維剖面之纖度2.3dtex、.纖維長45mm之分割型複合纖維 〇 〔纖維3〕鞘成分用熔點(B2m)132°C之高密度聚乙烯（日本 Polychem(股)製）芯成分用熔點(Blm)163t之聚丙烯（日本 Polychem(股）製），、.複合比50 : 50 ,纖度1.7dtex .，纖維長 10mm之同心圓鞘芯型複合纖維》 〔纖維4〕鞘成分用熔點(B2m)105°C之低密度聚乙烯(日本 Polychem(股)製），.芯成分用熔點(Blm)163°C之聚丙烯（日本 Polychem(股）製），。複合比50 : 50 /纖度l_7dtex，纖維長 10mm之同心圓鞘芯型複合纖維。. 〔纖維5〕鞘成分用熔點（B2m)132°C之高密度聚乙烯（曰本 17 本紙張尺度適用中國國家標準（CNS>A4规格（210 X 297_公釐） ----1 _----;-----. 裝----------訂---------線 (請先閱讀背面之注音3事項再填寫本頁) 4 6 6 79 5 A7 B7 五、發明說明（tc)45 § 79 5 A7 B7 V. Description of the invention (A)) (4) Capacitance retention rate The cylindrical sealed nickel-metal hydride battery produced as described above is charged at a rate of 0.1C for 12 hours, rested for 0.5 hour, and discharged 0.1 The C-rate termination voltage is 1.0V for one cycle. Charge and discharge are repeated for 10 cycles to perform the initial activation of the battery. After the initial activation, charge 0.1C rate for 12 hours, rest for 0.5 hour, and discharge 0.1C rate. The termination voltage is 1.0V for one cycle. Compared with the five cycles of charge and discharge, the discharge is repeated. Capacity: The ratio of the residual capacitance (0.1C rate discharge, -termination voltage 1.0V) after charging at the same condition (0.1C rate) for 14 days at 45 ° C is taken as the capacity retention rate after self-discharge . Charge and discharge are performed at 25 ° C. (5) Short circuit rate · After assembling 100 cylindrical sealed nickel-metal hydride batteries: The proportion of short circuit is taken as the short circuit rate. ^ (6) Cycle life, for the cylindrical sealed nickel-metal hydride battery after the initial activation, the charging rate is 0.1C for 10 hours, the rest is 0.5 hours, and the discharge is 0.1% (the termination voltage L0V) is 1. Cycles. Find the number of cycles when the utilization ratio of the theoretical capacitor becomes 90% or less. Charge and discharge were performed at 25 ° C. ⑺ Degree of sulfonation. A 5 cm × 5 cm test piece was cut out from the sample and immersed in a 13% KOH aqueous solution for 30 minutes. After that, wash with tap water for 30 minutes, and then wash with pure water for 30 minutes: Dry at 60 ° C for 1 hour to obtain an adjusted sample. Next ', using a fluorescent X-ray measuring device-, to measure the 16 paper sizes of non-woven fabrics in accordance with Chinese National Standard (CNS) A4 specifications (210 X 297 mm) (Please read the precautions on the back before filling this page ) ----- Order II ---- I ----. Member of the Intellectual Property Bureau of the Ministry of Economic Affairs. Printed by the Industrial and Consumer Cooperatives. Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economics. 79 5 A7 Λ __ _ Β7 V. Description of the invention ( / y) Concentration. Divide the total element concentration and multiply by 100 times to obtain the degree of sulfonation. (8) The preparation of the fiber is used as the raw material. The following fibers are prepared. Among the following fibers, the equivalent of the split composite fiber (A) is fiber 1, fiber 2: fiber 8. . The equivalent of the polyolefin-based composite fiber (B) is fibers 3 to 5, and the equivalent of the third synthetic fiber (C) is fibers 6 and 7. [Fiber 1] The first component is a methylpentene copolymer having a melting point (Dlm) of 240 ° C (manufactured by Mitsui Chemicals Co., Ltd.): the second component is a melting point (2111) of 163 ° (: polypropylene storage ( (Made by Japan Polychem Co., Ltd.). 'Composite ratio 50: 50 A split composite fiber with a fineness of 2.3 dtex and a fiber length of 6 mm as shown in Figure 1. [Fiber 2] The first component is a melting point (Dlm) 240 ° C methylpentene copolymer (made by Mitsui Chemicals Co., Ltd.): The second component is polypropylene (made by Japan Polychem (Stock)) with a melting point (D2m) of 163 ° C. 'Composite ratio 50 50 _ A split-type composite fiber with a fineness of 2.3 dtex and a fiber length of 45 mm as shown in FIG. 1 [Fiber 3] High-density polyethylene with a melting point (B2m) of 132 ° C (made by Polychem Japan) ) The core component is polypropylene with a melting point (Blm) of 163t (manufactured by Japan Polychem Co., Ltd.), a composite ratio of 50:50, a fineness of 1.7dtex, and a concentric sheath-core composite fiber with a fiber length of 10mm. [Fiber 4] The sheath component is made of low-density polyethylene with a melting point (B2m) of 105 ° C (manufactured by Japan Polychem Co., Ltd.). Concentric round sheath-core composite fiber with a composite ratio of 50: 50 / fineness l_7dtex and fiber length of 10mm .. [Fiber 5] High-density polyethylene with a melting point (B2m) of 132 ° C for sheath components (17 paper standards) Applicable to Chinese national standard (CNS > A4 specification (210 X 297_mm) ---- 1 _----; -----. Installation ------------ Order ---- ----- line (please read the note 3 on the back before filling this page) 4 6 6 79 5 A7 B7 V. Description of Invention (tc)
Polychem(股）製），,芯成分用熔點（Blm)163°C2聚丙烯（曰本 Polychem(股）製），.複合比50 : 50，·纖度l.7dtex .，纖維長 51mm之同心圓鞘芯型複合纖維。. 〔纖維6〕熔點163°C之聚丙烯（日本Pdychem(股)製)所構 成之纖度0.8dtex、.纖維長i〇mm之聚丙烯纖維,。 〔纖維7〕熔點163°C之聚丙烯（日本Polychem(股)製)所構 成之纖度0.8dtex :纖維長51mm之聚丙烯纖維，。 〔纖維8〕第1成分是用乙烯-乙烯醇共聚物（乙烯含量38 莫耳％)，.第2成分是用聚丙烯，複合比50 : 50 :具備圖2 所示的纖維剖面之纖度3.3dtex :纖維長6mm之分割型複合 纖維。. 〔實施例1〕 混合40重量％之纖維1、. 40重量％之纖維2 .、20重纛 %之纖維3而調製成濃度0.5%之漿液經濕式抄紙而得出 單位面積重55g/m2的原紙。藉由對原紙的表裏面以lOMPa 的壓力噴射高壓柱狀水流.，以將纖維1分割成極細纖維同 時使得纖維間纏結，.於135°C乾燥下進行熱熔接：得出不 織布。· 將所得之不織布用氯磺酸50重量％、.濃硫酸50重釁 %所混合成之液溫40°C的處理液進行1小時的浸漬處理·’ 之後於稀硫酸中浸漬10分鐘後於K0H溶液中浸漬1小時 以進行中和。.之後經水洗、.乾燥後、’實施熱壓延處理得 出單位面積重65g/m2、·厚0.15mm之電池用隔板。 〔實施例2〕 18 表紙張尺度適用中國國家標準（CNS)A4規格（210 x 297公爱） (請先閱讀背面之注意事項再填寫本頁) -' -------- 訂--------' 經濟部智慧財產局員工消費合作社印製 466 79 5 A7 ___ B7 五、發明說明（/L) 除使用100%氯磺酸作爲處理液外，，係使用和實施例1 相同的方法來得出單位面積重65g/m2 .、厚0.15mm之電池用 隔板。. 〔實施例3〕 除使用發煙硫酸20重量％、，濃硫酸80重量％之混合 液作爲處理液外，，係使用和實施例1相同的方法來得出單 位面積重65g/m2、.厚0.15mm之電池用隔板.。 〔實施例4〕 混合40重量％之纖維1: 40重量％之纖維3 : 20重量 %之纖維6而調製成濃度0.5%之漿液：經濕式抄紙而得出 單位面積重55g/m2的原紙。藉由對原紙的表裏面以lOMPa 的壓力噴射高壓柱狀水流，以將纖維1分割成極細纖維同 時使得纖維間纏結.，於135°C乾燥下進行熱熔接.，得出不 織布。· 將所得之不織布浸漬於丙烯酸水溶液後，.照射紫外線 以進行丙烯酸單體之接枝共聚合。.將不織布洗淨以除去未 反應的丙烯酸後·，施以乾燥及熱壓延處理.，得出單位面積 重65g/m2、.厚0.15mm之電池用隔板>。 〔實施例5〕 混合40重量％之纖維2、40重量％之纖維4 ; 20重量 %之纖維7，使用半無規梳理機來製作出單位面積重30g/m2 之纖維網。.藉由對纖維網的表裏面以5MPa的壓力噴射高 壓柱狀水流，以將纖維2分割成極細纖維同時使得纖維間 纏結，，於135°C乾燥下進行熱熔接，.得出單位面積重30g/m2 19 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)Polychem (strand), the core component is melting point (Blm) 163 ° C2 polypropylene (made by Polychem (strand)), composite ratio 50: 50, · fineness l.7dtex, fiber length 51mm concentric circles Sheath-core type composite fiber. [Fiber 6] Polypropylene fiber with a fineness of 0.8 dtex and a fiber length of 0 mm, made of polypropylene (made by Japan Pdychem Co., Ltd.) with a melting point of 163 ° C. [Fiber 7] A fineness of 0.8 dtex made of polypropylene (made by Japan Polychem Co., Ltd.) with a melting point of 163 ° C: polypropylene fiber having a fiber length of 51 mm. [Fiber 8] The first component is an ethylene-vinyl alcohol copolymer (with an ethylene content of 38 mol%). The second component is polypropylene, with a composite ratio of 50:50: having a fineness of 3.3 as shown in Fig. 2 dtex: Split-type composite fiber with a fiber length of 6mm. [Example 1] 40% by weight of fibers 1, 40% by weight of fibers 2, 20% by weight of fibers 3, and a slurry having a concentration of 0.5% was prepared by wet papermaking to obtain a weight per unit area of 55g / m2 of base paper. By spraying a high-pressure columnar water flow on the inside and outside of the base paper at a pressure of 10 MPa, the fiber 1 was divided into extremely fine fibers and the fibers were entangled, and heat-sealed at 135 ° C to obtain a non-woven fabric. · The obtained nonwoven fabric was immersed with a treatment liquid at a temperature of 40 ° C mixed with 50% by weight of chlorosulfonic acid and 50% by weight of concentrated sulfuric acid, and then immersed in dilute sulfuric acid for 10 minutes. It was immersed in KOH solution for 1 hour for neutralization. After that, it was washed with water, dried, and then subjected to a heat rolling treatment to obtain a battery separator having a weight per unit area of 65 g / m2 and a thickness of 0.15 mm. [Example 2] The paper size of 18 sheets is applicable to China National Standard (CNS) A4 specification (210 x 297 public love) (Please read the precautions on the back before filling this page)-'-------- Order- ------- 'Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 466 79 5 A7 ___ B7 V. Description of the invention (/ L) Except the use of 100% chlorosulfonic acid as the treatment liquid, it is the use and examples 1 Use the same method to obtain a battery separator with a weight per unit area of 65g / m2 and a thickness of 0.15mm. [Example 3] Except that a mixed solution of 20% by weight fuming sulfuric acid and 80% by weight concentrated sulfuric acid was used as the treatment liquid, the same method as in Example 1 was used to obtain a weight per unit area of 65 g / m2. 0.15mm battery separator ... [Example 4] 40% by weight of fiber 1: 40% by weight of fiber 3: 20% by weight of fiber 6 were mixed to prepare a slurry with a concentration of 0.5%: a base paper having a weight per unit area of 55g / m2 was obtained through wet papermaking. . A high-pressure columnar water jet was sprayed on the inside and outside of the base paper at a pressure of 10 MPa to divide the fiber 1 into extremely fine fibers while entanglement between the fibers. The fibers were heat-sealed at 135 ° C to obtain a non-woven fabric. · The obtained nonwoven fabric was immersed in an aqueous acrylic acid solution, and then irradiated with ultraviolet rays to perform graft copolymerization of acrylic monomers. The non-woven fabric was washed to remove unreacted acrylic acid, and then subjected to drying and hot rolling treatment to obtain a battery separator having a weight per unit area of 65 g / m2 and a thickness of 0.15 mm>. [Example 5] 40% by weight of fibers 2, 40% by weight of fibers 4; 20% by weight of fibers 7 were mixed, and a semi-random carding machine was used to produce a fiber web having a basis weight of 30 g / m2. By spraying a high-pressure columnar water flow on the surface of the fiber web at a pressure of 5 MPa, the fiber 2 is divided into extremely fine fibers and the fibers are entangled, and thermal fusion is performed at 135 ° C to obtain a unit area. Weight 30g / m2 19 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page)
.裝--I I -----訂..1--I 線· 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 4 6 6 7^5 A7 B7 五、發明說明（/^) 之不織布' 接著.，於濕式抄紙機中，在乾燥筒的入口側設置前述 不織布：將實施例1的構成纖維調整成濃度〇·5%之發液/ 邊以單位面積重成爲50g/m2的方式進行濕式抄紙：邊積層 上先前所設置的乾式不織布，·以135°C的乾燥筒實施熱處 理，·得出熔接有兩層的熱熔接性纖維之複合不織布.。 將所得之不織布用氯磺酸50重量％.、濃硫酸50重量 %所混合成之液溫40°C的處理液進行1小時的浸漬處理 之後於稀硫酸中浸漬10分鐘後於KOH溶液中浸漬1小時 以進行中和。.之後經水洗.、乾燥後，.實施熱壓延處理.，得 出單位面積重65g/m2 :厚〇.15mm之電池用隔板。 〔實施例6〕 除使用纖維4以取代原料之纖維3外係以和實施例 1相同的方法來得出單位面積重65g/m2、厚〇.15mm之電池 用隔板。. 〔實施例7〕 除將纖維的混合比例改採10重量％纖維1、50重量％ 纖維3 '.40重量％纖維6的方式外係以和實施例1相同 的方法來得出單位面積重65g/m2 v厚0.15mm之電池用隔板| 〇 〔實施例8〕 將實施例1的不織布在三氧化硫中處理3〇秒後，用 氫氧化鈉中和再用離子交換水洗淨於6〇°c下乾燥.。施以 熱壓延處理：得出單位面積重65g/m2 ·、厚之電池用 20 本紙張尺度適用117國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ---II--—訂·--— — — — — — . A7 B7 五、發明說明（/(f) 隔板。 〔比較例1〕 除使用纖維8以取代原料之纖維丨外，係以和實施例 1相同的方法來得出單位面積重65g/mS厚〇.15mm之電池 用隔板？ 以下.，將實施例1〜8 :比較例1之物性顯示於表丨。 〔表1〕 實施例 比較例1 1 2 3 4 5 6 Ί 8 拉伸強度(N/5cm) 93 84 90 108 110 80 115 99 40 保液率(％) 205 224 197 409 200 195 177 208 300 電容保存率(%) 79 77 80 78 77 79 60 82 56 短路率(％) 1 0 0 1 1 5 1 0 30 周期壽命(次） 790 800 820 600 785 790 550 81Ό 405 磺化度(wt%) 0.6 1.0 0.8 0 0.6 0.8 0.4 1.0 1,5 實施例4中.，由於未具磺基，周期壽命稍短；實施例 7中，，由於甲基戊烯系聚合物和聚烯烴系聚合物所構成之 分割型複合纖維的混合量少，不僅親水基的導入量少.，且 隔板缺乏緻密性，.電容保存率及周期壽命皆稍差。但在實 施例1〜3、5、6、8中：在親水化處理後仍能保持充分的強 度’且組裝入電池時之電容保存率也能保持將近80%.，而 有助於自我放電性之改良。.另一方面.，比較例1中·，基於 磺化處理般之過度嚴苛的親水化處理,，纖維會產生必要以 上的損傷，·縱方向的拉伸強度極度降低·，組裝時將產生破 21 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝 --------訂---- 線· 經濟部智慧財產局員工消費合作社印製 4 6 6 79 5 A7 B7 五 、發明說明 經濟部智慧財產局具.工消費合作社印製 損，.短路率變高而導致生產性明顯的變差.。 〔發明之效果〕 本發明之電池用隔板’·其主體是使用甲基戊烯系聚合 物和聚烯烴系聚合物所構成之分割型複合纖維.、以及高熔 點成分和低熔點成分所構成之聚烯烴系複合纖維·，並實以 親水化處理，.藉此以賦予耐熱性，同時具有優異的保液性 及充分的不織布強度，·不致降低電池壽命且能提昇電池容 量。4若親水化處理是採磺化處理，·特別是有助於自我放電 性的改良； 又，.本發明之組裝入前述電池用隔板的電池：能改良 自我放電性，_特別適用於電動車(PEV)及混合動力車(HEV)· 〇 〔圖式之簡單說明〕 圖1係顯示本發明所甩之分割型複合纖維的纖維剖面 圖之一例。. 圖2係顯示本發明所用之分割型複合纖維的纖維剖面 圖之一例.。 圖3係顯示本發明所用之分割型複合纖維的纖維剖面 圖之一例。. 〔符號說明〕 2. 第1成分 第2成分 22 表紙張尺度適用中國國家標準（CNS>A4規格（21〇 X 297公爱） (請先閱讀背面之注意事項再填寫本頁) · I I I I I I I «ΓΙΙΙΙΙΙ — I..Packing--II ----- Order..1--I Line · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 4 6 6 7 ^ 5 A7 B7 V. Invention Explanation (/ ^) of the non-woven fabric 'Next, the aforementioned non-woven fabric is set on the inlet side of the drying cylinder in a wet paper machine: the constituent fibers of Example 1 are adjusted to a hair solution with a concentration of 0.5% per side per unit area Wet-type papermaking at a weight of 50 g / m2: The dry nonwoven fabric previously set on the edge stack is heat-treated in a drying cylinder at 135 ° C to obtain a composite nonwoven fabric with two layers of heat-fusible fibers fused. The obtained nonwoven fabric was impregnated with a treatment solution having a liquid temperature of 40 ° C. mixed with 50% by weight of chlorosulfonic acid and 50% by weight of concentrated sulfuric acid, and then immersed in dilute sulfuric acid for 10 minutes, and then dipped in a KOH solution 1 hour for neutralization. After that, it was washed with water and dried, and then subjected to a hot rolling treatment to obtain a battery separator having a weight per unit area of 65 g / m2 and a thickness of 0.15 mm. [Example 6] A battery separator having a weight per unit area of 65 g / m2 and a thickness of 0.15 mm was obtained in the same manner as in Example 1 except that the fiber 4 was used instead of the fiber 3 of the raw material. [Example 7] A weight per unit area of 65 g was obtained in the same manner as in Example 1 except that the mixing ratio of the fibers was changed to 10% by weight of fibers 1, 50% by weight of fibers 3'.40% by weight of fibers 6, and the like. / m2 v battery separator with thickness of 0.15mm | 〇 [Example 8] The nonwoven fabric of Example 1 was treated with sulfur trioxide for 30 seconds, then neutralized with sodium hydroxide and washed with ion-exchanged water at 6 Dry at 0 ° C. Applying calendering treatment: the weight per unit area is 65g / m2 · 20 for thick batteries. This paper size is applicable to 117 national standards (CNS) A4 specifications (210 X 297 mm) (Please read the precautions on the back first) (Fill in this page again) --- II ---- Order · ---- — — — — — A7 B7 V. Description of the invention (/ (f) Separator. [Comparative Example 1] Except using fiber 8 instead of raw materials Outside the fiber, a battery separator with a weight per unit area of 65 g / mS and a thickness of 0.15 mm was obtained in the same manner as in Example 1. Hereinafter, the physical properties of Examples 1 to 8: Comparative Example 1 are shown in Table 丨. [Table 1] Example Comparative Example 1 1 2 3 4 5 6 Ί 8 Tensile strength (N / 5cm) 93 84 90 108 110 80 115 99 40 Liquid retention (%) 205 224 197 409 200 195 177 208 300 Capacitance retention rate (%) 79 77 80 78 77 79 60 82 56 Short circuit rate (%) 1 0 0 1 1 5 1 0 30 Cycle life (times) 790 800 820 600 785 790 550 81Ό 405 Degree of sulfonation (wt%) 0.6 1.0 0.8 0 0.6 0.8 0.4 1.0 1,5 In Example 4, because there is no sulfo group, the cycle life is slightly shorter; in Example 7, because of methylpentene polymer and polyolefin polymer The composition of the split composite fiber is small, not only the introduction amount of the hydrophilic group is small, but the separator lacks compactness, and the capacitor retention rate and cycle life are slightly inferior. However, in Examples 1 to 3, 5, 6, and 8: Can maintain sufficient strength after hydrophilization treatment, and the capacity retention rate when assembled into the battery can also be maintained at nearly 80%, which contributes to the improvement of self-dischargeability .. On the other hand, comparative examples 1 ·· Based on excessively severe hydrophilization treatment, such as sulfonation treatment, the fiber will cause more than necessary damage. · The tensile strength in the longitudinal direction will be extremely reduced. 21 will be broken during assembly. Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling out this page) Loading -------- Order ---- Line · Consumer Property Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs Printing 4 6 6 79 5 A7 B7 V. Description of the Invention Intellectual Property Bureau of the Ministry of Economic Affairs. Printing loss of industrial and consumer cooperatives. Short circuit rate becomes high and results in marked deterioration of productivity. [Effect of the Invention] Battery separator '· The main body is polymerized using methylpentene Materials and polyolefin-based polymers are divided into composite fibers, and polyolefin-based composite fibers composed of high-melting and low-melting components are treated with hydrophilization to provide heat resistance and provide heat resistance. It has excellent liquid retention and sufficient non-woven strength, which will not reduce battery life and increase battery capacity. 4 If the hydrophilization treatment is a sulfonation treatment, it is particularly helpful to improve the self-discharge property; and, the battery assembled into the battery separator of the present invention can improve the self-discharge property, and is particularly suitable for electric motors. Vehicles (PEV) and Hybrid Electric Vehicles (HEV) · 〇 [Simplified Description of Drawings] FIG. 1 is an example of a fiber cross-sectional view of a split composite fiber thrown by the present invention. Fig. 2 shows an example of a fiber cross-sectional view of a split type composite fiber used in the present invention. Fig. 3 is an example of a fiber cross-sectional view of a split type composite fiber used in the present invention. 〔Explanation of Symbols〕 2. The first component, the second component, and the 22-sheet paper size are applicable to the Chinese national standard (CNS > A4 specification (21〇X 297 public love) (Please read the precautions on the back before filling out this page) · IIIIIII « ΓΙΙΙΙΙΙΙ — I.