1301795 玖、發明說明： 【發明所屬之技術領域】 本發明係有關一種感壓黏著帶。特別本發明係有關一種 具有絕佳徒手切斷性質以及絕佳縱向方向強度之感壓黏著 帶。 【先前技術】 目前可重覆離型的感壓黏著帶或黏著片（「感壓黏著帶 或黏著片」於後文通稱為「感壓黏著帶」）用於金屬板、經 塗覆之金屬板、所謂之「鋁框架」、樹脂板、裝飾用鋼板、 以氯乙烯為主的樹脂層合鋼板、層合板、玻璃板等的運送、 加工處理、以及硬化過程，用於表面保護帶或保護片用作 為表面保護等之沾黏用途。於感壓黏著帶之沾黏工作期間 經常使用切削工具如剪刀及刀片等之切割方法。此外，可 重覆離型感壓黏著帶也用於建築物的硬化、途層的硬化 等；由於感壓黏著帶係用於支承基材接受不規則加工處理 的感壓黏著帶，故於沾黏過程可容易以手指割斷。特別例 如日本專利案第2，6 9 4，8 5 4號所述之感壓黏著帶屬於此種 感壓黏著帶。 於此種感壓黏著帶，當藉切削工具如剪刀或刀片等切割 方法割斷時，切割工具可能傷害到被黏著物。由此緣故， 因而需有可容易且安全地切割以及有絕佳工作能力之感壓 黏著帶。 此外，於建築物的硬化或於塗層的硬化，在硬化後當感 壓黏著帶離型時、以高速離型之情況或於冬季之低溫環境 離型之情況，可能造成感壓黏著帶容易斷裂問題。此點係 5 312/發明明書(補件)/92-12/92125728 1301795 屬於縱向抗撕強度問題（感壓黏著帶縱向方向之抗撕i 度）。 * 【發明内容】 如此本發明之目的係提供一種具有絕佳徒手割斷性 且可增進割斷時工作能力之感壓黏著帶。 本發明之另一目的係提供一種感壓黏著帶，其可被 斷，具有絕佳徒手割斷性質，即使於高速離型的情況 於低溫環境離型的情況也不會造成斷裂。 為了達成前述目的，發明人進行積極徹底研究。結 現經由界定支承基材表面有不規則形狀之感壓黏著帶 力與應變間之關係之物理性質，不僅該感壓黏著帶可 而具有絕佳徒手割斷性質以及具有割斷期間的良好工 力，同時感壓黏著帶即使於高速離型的情況、或感壓 帶於低溫環境離型的情況被割斷也不會造成割斷過程 裂，因而完成本發明。 本發明係特別有關一種感壓黏著層，其具有一塑膠 成之支承基材以及一感壓黏著層成形於該支承基材之 一側面上，一不規則部分其形狀係於相對於縱向方向 直方向延伸，該不規則部分係設置於支承基材之一側 上，其中於伸長率不大於5 0 %之最大應力，係大於斷 應力，而斷裂點伸長率為1 0 0 %至3 0 0 %。 前述感壓黏著帶較佳具有伸長率不大於50 %時之最 力為1 1牛頓/ 1 0毫米或以上。此外塑膠膜可為以樹脂 為主之樹脂製成的薄膜，以烯烴為主之樹脂較佳含有 度聚乙烯及低密度聚乙烯。此外支承基材可具有透明 312/發明明書(補件)/92-12/92125728 質 割 、或 果發 的應 割斷 作能 黏著 的斷 膜製 至少 之垂 面 裂點 大應 烯烴 高密 度0 6 1301795 【實施方式】 本發明之感壓黏著帶之特徵在於伸長率不大於5 0 %之最 大應力，係大於斷裂點應力，以及斷裂點伸長率為1 0 0 % 至3 0 0 %。此外重要地，本發明之感壓黏著帶具有塑膠膜 製成的支承基材，以及感壓黏著帶形成於支承基材之至少 一側面上，一不規則部分，其形狀係於相對於縱向之垂直 方向延伸且係設置於支承基材之一側面上。因本發明之感 壓黏著帶具有前述構造，故具有絕佳徒手割斷性質。由此 緣故，本發明之感壓黏著帶可容易且安全地以手指割斷， 而無需使用剪刀及刀片等切削工具來切割。如此可避免切 削工具傷及被黏著物，且大大促進割斷時的工作能力。此 外，用於建築物硬化或塗層硬化用途，於硬化後，在感壓 黏著帶之離型過程，即使以高速離型或於低溫環境離型， 可防止感壓黏著帶於離型過程斷裂或以絕佳徒手割斷性質 切割。 本發明之感壓黏著帶特別視需要使用應力-應變曲線說 明。第1圖為顯示有關本發明之感壓黏著帶實施例的應力-應變曲線圖。於本應力-應變曲線，縱座標表示應力（牛頓 / 1 0毫米），以及橫座標表示抗拉伸長率（％ )。根據圖1之 應力-應變曲線，當抗拉伸長率於0 %至約5 0 %範圍升高 時，應力快速上升；之後隨著抗拉伸長率的增加，應力徐 緩下降；感壓黏著帶於抗拉伸長率約1 5 0 %時造成斷裂。 因此，本發明係要緊地（1 )伸長率不大於5 0 %之最大應力， 而係大於斷裂點應力；以及（2 )斷裂點伸長率為1 0 0 %至3 0 0 7 312/發明明書(補件)/92-12/92125728 1301795 於根據第1圖之應力-應變曲線，應力於伸長率不大於 5 0 %之範圍有個顯著尖峰；但如第2圖所示應力-應變曲 線，應力不具有顯著尖峰。第2圖為顯示有關本發明之感 壓黏著帶之其它實施例之應力-應變曲線圖。 •此外於根據第1圖之應力-應變曲線，於到達尖鋒（或最 大值）之後，隨著伸長率的增加，應力徐緩下降；但如根據 第2圖之應力-應變曲線所示，應力維持實質衡定值。 本發明中，只要於伸長率不大於5 0 %之最大應力係大於 斷裂點應力，則伸長率不大於5 0 %之最大應力與斷裂點應 力間之差值或比值並無特殊限制。作為伸長率不大於5 0 °/〇 之最大應力與斷裂點應力間之差值，例如希望[(伸長率不 大於5 0 %之最大應力）一（斷裂點應力）]之值為0 · 1牛頓 / 1 0毫米或以上（例如0 . 1至7牛頓/ 1 0毫米，較佳0 · 5至 5牛頓/ 1 0毫米，且更佳1至3牛頓/ 1 0毫米）。當於伸長 率不大於5 0 %之最大應力係小於斷裂點應力時，徒手割斷 性質下降。 此外，伸長率不大於5 0 %之最大應力之值（絕對值）並無 特殊限制，但希望為1 1牛頓/ 1 0毫米或以上（例如1 1至2 5 牛頓/ 1 0毫米，較佳1 2至2 5牛頓/ 1 0毫米及更佳1 3至2 5 牛頓/ 1 0亳米）。當伸長率不大於5 0 %之最大應力值係小於 1 1牛頓/ 1 0毫米時，於硬化後，於感壓黏著帶之離型過程， 感壓黏著帶容易斷裂。 此外，斷裂點伸長率為1 0 0 %至3 0 0 % (較佳1 0 0 %至2 5 0 °/〇，更佳1 2 0 %至2 5 0 %及特佳1 5 0 %至2 0 0 % )。當斷裂點 伸長率超過3 0 0 %時，徒手割斷性質下降；而當斷裂點伸 8 312/發明明書(補件)/92-12/92125728 1301795 長率低於1 ο ο %時，感壓黏著帶於離型過程容易斷裂。 本發明中，感壓黏著帶之應力-應變曲線之獲得方式係 經由於夾頭間距5 0毫米以及應力速率1，0 0 0毫米/分鐘， 於室溫（2 3 °C )以及於6 5 %相對濕度之條件下，使用拉力測 試器（測試器名稱：島津自動繪圖儀，島津製作所製造）， 測量寬1 0毫米之感壓黏著帶之應力而獲得。於拉伸過程當 部分感壓黏著帶裂開時的應力定義為斷裂點應力，同理， 當部分感壓黏著帶裂開時的伸長率定義為斷裂點伸長率。 如前述，本發明之感壓黏著帶具有一塑膠膜製成的支承 基材，以及一感壓黏著帶成形於該支承基材之至少一側面 上。此外，本發明之感壓黏著帶具有不規則部分，其形狀 係相對於縱向方向於垂直方向延伸於支承基材之一側面 上。只要感壓黏著帶具有前述組成，且符合前述物理性質 則作為支承基材之塑膠膜之調配物以及對感壓黏著層之感 壓黏著劑之調配物並無特殊限制。 作為支承基材之塑膠膜材料例如包括以烯烴為主之樹 脂例如以聚丙烯為主之樹脂（如聚丙烯）以及以聚乙烯為主 之樹脂（例如高密度聚乙烯、中密度聚乙烯、低密度聚乙 烯、線性低密度、超低密度聚乙烯、乙烯-乙酸乙烯酯共聚 物、乙烯-丙烯酸乙酯共聚物以及乙烯-丙烯共聚物）；以及 熱塑性彈性體。塑膠膜材料可單獨使用或混合兩種或兩種 以上之材料使用。 至於塑膠膜材料，以烯烴為主之樹脂為佳，以聚乙烯為 主之樹脂為特佳。本發明中，以聚乙烯為主之樹脂適合為 包含高密度聚乙烯與低密度聚乙烯之組合之適當混合樹脂 9 312/發明明書(補件)/92-12/92125728 1301795 (混合物）。換言之，特佳以聚烯烴為主之樹脂含有高密度 聚乙烯及低密度聚乙烯。於此種混合樹脂，以高密度聚乙 烯對低密度聚乙烯之比表示，高密度聚乙烯對低密度聚乙 烯之比例如係選自1 0 / 9 0至9 0 / 1 0 (較佳2 0 / 8 0至5 0 / 5 0 ) 之範圍。作為高密度聚乙烯較佳具有0 . 9 4 0克/立方厘米至 0.970克/立方厘米之密度，且特佳為具有0.950克/立方 厘米至0.965克/立方厘米之密度。另一方面，作為低密度 聚乙烯較佳具有密度由0.880克/立方厘米至0.930克/立 方厘米，以及特佳為具有密度由0.910克/立方厘米至 0 . 9 2 9克/立方厘米。此等密度為根據J I S K 7 1 1 2所得測量 值。 塑膠膜可含有添加劑[例如填充劑、著色劑（例如顏料及 染料）、抗老化劑以及增塑劑]。為了促進感壓黏著帶之徒 手割斷性質，以1 0 0份重量比組成塑膠膜之樹脂為基準， 如碳酸鈣等填充劑可以1 0份重量比或以上之比例含於塑 膠膜。本發明中，並非經常性需要添加由此種無機化合物 製成的填充劑。反而，由控制低溫之脆變斷裂觀點，較佳 未混料任何填充劑於塑膠膜。 但當有多種填充劑用於提供徒手割斷性質以外之其它 性質時，則可混料填充劑。徒手割斷性質以外之其它效果 例如包括阻燃性、耐光性、耐熱性、熱變形性以及剛硬性。 此種情況下，以1 0 0份重量比組成塑膠膜之樹脂為基準， 較佳填充劑用量不大於5份重量比（較佳1至3份重量比）。 本發明中，具有於寬度方向（相對於縱向之垂直方向）延 伸形狀之不規則部係成形於作為支承基材之塑膠膜之一側 10 312/發明明書(補件)/92-12/92125728 1301795 面上。此種不規則部之形狀並無特殊限制，例如包括圓錐 形、三角錐形、四角錐形、半球形、圓柱形、三角柱形及 四角柱形。 不規則部主要係成形為於塑膠膜之寬度方向（相對於縱 向之垂直方向）延伸，則不規則部可呈任一種狀態。舉例言 之，當凹部形狀為圓錐形、三角錐形、四角錐形或半球形 時，複數個具有圓錐形、三角錐形、四角錐形或半球形之 凹部係成形於寬度方向，因此整體形成於寬度方向延伸形 狀之凹部。此外，當凹部形狀為圓柱形、三角柱形或四角 柱形時，圓柱形、三角柱形或四角柱形凹部本身形成於寬 度方向延伸的形狀。如此不規則部之形狀為不僅有一凹部 係於寬度方向延伸，也可為有複數個凹部的組合於寬度方 向延伸之形狀。 本發明中，較佳不規則部係於直線態或彎曲態（例如鋸 齒形態及浪形態）設置。舉例言之，圖3 A及3 B所示，顯示 直線凹部成形於寬度方向之形狀。圖3A及3B各自為示意 圖，部分顯示組成本發明之感壓黏著帶之塑膠膜結構範 例，其中圖3A為由上方俯視之平面圖，以及圖3B為剖面 圖。圖3A及3B中，具有四角柱形截面之直線凹部設置於 長條狀塑膠片之寬度方向。圖3 A及3 B中，L表示塑膠膜； 表示凹部；L表示凹部2寬度；k表示凹部2之間隔距離； L表示凹部2深度；表示塑膠膜1之縱向方向；以及 表示塑膠膜1之寬度方向。 不規則部之尺寸（大小）並無特殊限制，例如凹部深度h 為約0 . 0 2至0 . 1 5毫米（較佳0 . 0 4毫米至0 . 1 2毫米）。當 11 312/發明明書(補件)/92-12/92125728 1301795 凹部深度小於0 . 0 2毫米時，雖然於感壓黏著帶縱向之縱抗 撕強度增加，但寬度方向之徒手割斷性質可能下降。 此外，凹部寬度（d )並無特殊限制，例如可選自約0. 0 1 至0 . 5毫米之範圍（較佳約0 . 0 1毫米至0. 2毫米）。 此外，凹部之間隔距離（L)並無特殊限制，但例如可選 自於約0 . 5毫米至5毫米（較佳0 · 6毫米至1 · 4毫米）之範 圍。 形成不規則部之方法例如包括一種方法其中，呈熔融態 之樹脂對其上有不規則浮雕之成形輥加壓，因此將不規則 形狀轉運至樹脂；以及一種方法其中於成形一塑膠膜後， 塑膠膜對具有不規則形狀之輥加壓。因此形成不規則形狀 於塑膠膜上。不規則部之形成方法可根據不規則部之預定 形狀而選自已知方法或習知方法。 塑膠膜表面（一側面或二側面）可接受多種已知或習知 之表面加工處理，包括電暈放電處理、底塗層處理以及反 向處理。 塑膠膜厚度（總厚度）並無特殊限制，例如可選自約2 0 微米至3 0 0微米（較佳5 0微米至2 0 0微米及更佳7 0微米至 1 5 0微米）之範圍。支承基材可具有單層或多層之任一種形 式。 支承基材或塑膠膜可為透明或不透明，但較佳支承基材 或塑膠膜為透明。 感壓黏著層成形於此種塑膠膜製成的支承基材之至少 一側面。組成感壓黏著層之感壓黏著劑並無特殊限制，但 可使用多種感壓黏著劑，該等感壓黏著劑例如可歸類為以 12 312/發明明書(補件)/92-12/92125728 1301795 橡膠為主之感壓黏著劑、丙烯酸系感壓黏著劑、以聚矽氧 為主之感壓黏著劑以及以胺基甲酸酯為主之感壓黏著劑。 根據被黏著物、使用目的等，感壓黏著劑可選自已知或習 用之感壓黏著劑。感壓黏著劑可單獨使用或混合兩種或兩 種以上使用。 感壓黏著層可成形於支承基材之至少一側面上，該支承 基材之一側面有一不規則部，成形方法係經由一種方法其 中感壓黏著劑直接塗覆於支承基材之至少一側面（一側面 或兩側面）上；或一種方法其中感壓黏著劑係塗覆於隔件 上，以及隔件上之感壓黏著劑移轉至支承基材上。當感壓 黏著層係成形於支承基材之一側面時，感壓黏著層可成形 於支承基材之未形成不規則部之該側面上，或成形於支承 基材之形成不規則部之該側面上。本發明中，較佳感壓黏 著層係成形於支承基材之未形成不規則部之該側面上。此 種情況下，支承基材之形成不規則部之該側面可作為捲繞 成捲形之感壓黏著帶之離型側。 附帶一提的，於塗覆感壓黏著劑時，可使用習知塗覆 機，例如凹板塗覆機、逆輥塗覆機、接觸輥塗覆機、浸塗 輥塗覆機、桿塗覆機、刀塗覆機以及噴霧塗覆機。 感壓黏著層厚度（總厚度）並無特殊限制，但例如可選自 約1微米至1 0 0微米（較佳5微米至5 0微米，更佳1 5微米 至4 0微米）之範圍。 本發明之感壓黏著帶可用作為捲繞成捲形之感壓黏著 帶。感壓黏著層表面可藉隔件保護。 根據本發明之感壓黏著帶，可提供絕佳徒手割斷性質， 13 312/發明明書(補件)/92-12/92125728 1301795 以及促進割斷期間之工作能力。此外，本發明之感壓黏著 ， 帶即使於高速離型之情況下、或於低溫環境離型之情況 下，可被割斷，具有絕佳徒手割斷性質而未造成斷裂。 後文將參照下列實施例說明本發明，但不可將本發明解 譯為囿限於此等實施例。全部份數皆為份數重量比。 (所使用之材料） • 低密度聚乙烯（後文中有時稱作為“ LDPE” ）： (1) 商品名：「梳密卡辛（Sumikathene) G201」（住友 化學公司製造，密度：0 . 9 1 9克/立方厘米（後文有 時稱作為“ L D P E - 1 ” 。 (2) 商品名：「梳密卡辛F2 18-0」（住友化學公司製 造，密度·· 0 . 9 1 9克/立方厘米（後文有時稱作為 “ L D P E - 2，， ° (3 )商品名：「梳密卡辛G 4 0 1」（住友化學公司製造， 密度：0.926克/立方厘米（後文有時稱作為 “ L D P E - 3，，。 (4)商品名：「梳密卡辛F1 02-0」（住友化學公司製 造，密度：0 . 9 2 2克/立方厘米（後文有時稱作為 “ LDPE-4” 。 • 高密度聚乙烯（後文有時稱作為“ HDPE” ）： (1) 商品名··「海茲西（Hizex) 2200J」（三井化學公 司製造，密度·· 0 . 9 6 4克/立方厘米（後文有時稱 作為 “ H D P E - 1 ” 。 (2 ) 商品名：「海茲西 5 0 0 0 S F」（三井化學公司製造， 密度：0.956克/立方厘米（後文有時稱作為 14 312/發明明書(補件)/92-12/92125728 1301795 "H D P E - 2，’ ° • 填充劑： (l) 無機填充劑（輕質沉澱碳酸鈣，土屋鈣公司製 造）。 (實施例1 ) L D P E及H D P E以表1所示比例乾攙混而製造混合樹脂組 成物，然後該組成物使用擠壓成形機以2 6 0 °C模溫擠壓而 製備塑膠膜。塑膠膜對其上有不規則浮雕部的輥加壓，而 製備塑膠膜（膠帶基材），塑膠膜之總厚度為0 . 1 0 0毫米， 凹部（溝槽）深度為0 . 0 4 0毫米，凹部寬度為0 · 2 0 0毫米， 不規則部之間隔距離（凹部之間隔距離）為1 . 0 0 0毫米，如 圖3 A及3 B所示。此種帶狀基材（支承基材）之一側面（未形 成凹部之該側面）接受電暈放電處理，丙烯酸系感壓黏著劑 塗覆於經過電暈放電處理該側上（乾燥後厚度：3 0微米）接 著捲繞成捲形來製備捲繞成捲形之感壓黏著帶。 (實施例2至4 ) 帶狀基材係以實施例1之相同方式製備，但採用之LDPE 及HDPE比例係如表1所示。此外，依照實施例1之相同程 序來製備捲繞成捲形之感壓黏著帶。 (比較例1至6) 以實施例1之相同方式製備帶狀基材，但採用表2所示 L D P E與H D P E之比例。比較例6 (混料填充劑之例）中，填充 劑預先混合H D Ρ Ε或L D Ρ Ε來製備母批料。 隨後進一步遵照實施例1之相同程序，來製備捲繞成捲 形之感壓黏著帶。唯有於比較例6，模溫為1 9 0 °C 。 15 312/發明明書(補件)/92-12/92125728 1301795 表1 實施例 1 2 3 4 LDPE : LDPE-1 50 70 80 LDPE-2 50 LDPE-3 LDPE-4 HDPE : HDPE-1 50 30 20 50 HDPE-2 無機填充劑 表2 比較例 1 2 3 4 5 6 LDPE : LDPE-1 50 LDPE-2 LDPE-3 70 LDPE-4 70 7 0 1 00 HDPE : HDPE-1 30 100 30 50 HDPE-2 30 無機填充劑 10 (評比方法） 實施例1至4以及比較例1至6所得感壓黏著帶各自使 用市售切刀切割成載明之寬度（寬1 0 0毫米，寬2 5毫米， 寬6 3毫米等）來準備試驗件。試驗件接受以下抗拉試驗及 抗，撕試驗，評比拉力特性及撕裂特性。評比結果顯示於表 3或4。 (抗拉試驗） 寬1 0毫米之感壓黏著帶之應力之測量方式係將感壓黏 著帶使用抗拉試驗機（試驗機名稱：島津自動繪圖儀，島津 製作所製作），於夾頭間距5 0毫米，以及應力速率1，0 0 0 毫米/分鐘之條件下於室溫（2 3 °C )以及6 5 %相對濕度拉伸 16 312/發明明書(補件)/92-12/92125728 1301795 測定。拉伸期間，當部分感壓黏著帶斷裂時之應力定義為 斷裂點應力；同理，當部分感壓黏著帶斷裂時之伸長率定 義為斷裂點伸長率。 附帶一提，有關.實施例1之感壓黏著帶之應力-應變曲 線顯示於圖1 ;實施例2之感壓黏著帶之應力-應變曲線顯 示於圖2 ;實施例3之感壓黏著帶之應力-應變曲線顯示於 圖4 ;以及實施例4之感壓黏著帶之應力-應變曲線顯示於 圖5。此外，有關比較例1至6之感壓黏著帶之應力-應變 曲線分別顯示於圖6至1 1。 此外，寬2 5毫米之感壓黏著帶以3 0 0毫米長度黏著於 市售地板上，黏著條件為室溫（2 3 °C )及6 5 %相對濕度，且 進一步提供前方長1 0 0毫米，該感壓黏著帶於撕離角為約 3 0度以及撕離速度約1，0 0 0毫米/分鐘之條件下撕離（共三 次）。如此感壓黏著帶係根據下述評比標準評比縱向抗撕強 度。 (縱向抗撕離強度之評比標準） 〇：於全部三次皆可進行撕離而不會於撕離過程造成斷 裂。 △:可進行撕離兩次而不會造成斷裂。 X ••只可進行撕離一次，或全部三次皆發生斷裂。 (抗撕試驗） 寬6 3毫米之感壓黏著帶係於室溫（2 3 °C )及6 5 %相對濕度 未提供凹口之情況下，使用艾曼朵夫（E 1 m e n d 〇 r f )抗撕試驗 機（試驗機三洋公司製造）測定抗撕性以及評比撕裂性質。 此外，進行徒手割斷試驗（以手指割斷感壓黏著帶之試 17 312/發明明書(補件)/92-12/92125728 1301795 驗）五次作為感官知覺檢驗，以及根據下述標準評比撕裂性， 質（感官知覺檢驗）。 (藉感官知覺檢驗評比撕裂性質之標準） 〇：全部五次感壓黏著帶皆易以手指割斷。 △:感壓黏著帶易以手指割斷四次。 X :感壓黏著帶不易以手指割斷超過三次。 表3 實施例 1 2 3 4 拉力特性： 於伸長率不大於50 %範圍之最大 應力（牛頓/ 1 0毫米） 18 16.1 15.6 17.6 斷裂應力（牛頓/ 1 0毫米） 14.9 15.3 15.4 14. 7 斷裂點伸長率（％) 151 154 231 109 縱向抗撕強度之評比（感官知覺 檢驗） 〇 〇 〇 〇 撕裂特性： 艾曼朵夫抗撕試驗（牛頓） 0.96 1.12 1.60 1.12 藉感官知覺檢驗評比撕裂性質 〇 〇 〇 〇 表4 比較例 1 2 3 4 5 6 拉力特性： 於伸長率不大於50 %範圍 之最大應力（牛頓/1 0毫 米） 17. 3 23 15.4 7. 9 13. 5 17. 1 斷裂應力（牛頓/1 0毫米） 21. 1 36. 4 20.3 10 12 16. 1 斷裂點伸長率（％) 387 1，096 261 269 86 66 縱向抗撕強度之評比（感 官知覺檢驗） 〇 〇 〇 X Δ Δ 撕裂特性： 艾曼朵夫抗撕試驗（牛頓） 未切斷 未切斷 未切斷 未切斷 0. 64 5. 12 藉感官知覺檢驗評比撕裂 性質 X X X X 〇 Δ 由表3及圖1、2、4及5，顯然於實施例1至4之感壓 黏著帶於伸長率不大於5 0 %範圍之最大應力，係大於斷裂 點應力，於伸長率不大於5 0 %範圍之最大應力為1 1牛頓 18 312/發明明書(補件)/92-12/92125728 1301795 / 1 0毫米或以上，斷裂點伸長率為1 0 0 %至3 0 0 %。此外， 根據實施例1至4之感壓黏著帶具有良好徒手割斷性質， 可容易穩定地撕離而不會中途造成斷裂。 另一方面，根據比較例1及2之感壓黏著帶，伸長率不 大於5 0 %範圍之最大應力係小於斷裂點應力，以及斷裂點 伸長率超過3 0 0 %。此等感壓黏著帶無法以手指割斷。 根據比較例3及4之感壓黏著帶，雖然斷裂點伸長率小 於3 0 0 %，但於伸長率不大於5 0 %範圍之最大應力係小於 斷裂點應力。此等感壓黏著帶無法以手指割斷。 於根據比較例5及6之感壓黏著帶，雖然於伸長率不大 於5 0 %範圍之最大應力係大於斷裂點應力，但斷裂點伸長 率小於1 0 0 %。此等感壓黏著帶於縱.向容易斷裂。 雖然已經參照特定具體實施例說明本發明之細節，但熟 諳技藝人士可未悖離其精髓及範圍做出多種變化及修改。 【圖式簡單說明】 圖1顯示有關實施例1之感壓黏著帶之應力-應變曲線 圖。 圖2顯示有關實施例2之感壓黏著帶之應力-應變曲線 圖。 圖3 Α及3 Β各自為示意圖，部分顯示組成本發明之感壓 黏著帶之塑膠膜結構範例，其中圖3 A為由上方俯視之平面 圖，以及圖3 B為剖面圖。 圖4顯示有關實施例3之感壓黏著帶之應力-應變曲線 圖。 圖5顯示有關實施例4之感壓黏著帶之應力-應變曲線 19 312/發明明書(補件)/92-12/92125728 1301795 圖。 圖6顯示有關比較例1之感壓黏著帶之應力-應變曲線 圖。 圖7顯示有關比較例2之感壓黏著帶之應力-應變曲線 圖。 圖8顯示有關比較例3之感壓黏著帶之應力-應變曲線 圖。 圖9顯示有關比較例4之感壓黏著帶之應力-應變曲線 圖。 圖1 〇顯示有關比較例5之感壓黏著帶之應力-應變曲線 圖。 圖1 1顯示有關比較例6之感壓黏著帶之應力-應變曲線 圖。 (元件符號說明） 1 塑膠膜 2 凹部 d 凹部2之寬度 L 凹部2之間隔距離 h 凹部2之深度 X 塑膠膜1之縱向 Y 塑膠膜之寬度方向· 20 312/發明明書(補件)/92-12/921257281301795 发明, DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a pressure-sensitive adhesive tape. In particular, the present invention relates to a pressure-sensitive adhesive tape having excellent hand-cutting properties and excellent longitudinal direction strength. [Prior Art] At present, the pressure-sensitive adhesive tape or adhesive sheet which can be repeatedly peeled off ("pressure-sensitive adhesive tape or adhesive sheet" is hereinafter referred to as "pressure-sensitive adhesive tape") is used for metal plate and coated metal. Transportation, processing, and hardening of plates, so-called "aluminum frames", resin sheets, decorative steel sheets, vinyl chloride-based resin laminated steel sheets, laminates, glass sheets, etc., for surface protection tapes or protection The sheet is used as a sticky use for surface protection and the like. Cutting tools such as scissors and blades are often used during the adhesion of the pressure-sensitive adhesive tape. In addition, the re-detachable pressure-sensitive adhesive tape is also used for hardening of buildings, hardening of the road layer, etc.; since the pressure-sensitive adhesive tape is used for supporting the substrate to receive the pressure-sensitive adhesive tape which is irregularly processed, The sticky process can be easily cut with a finger. Particularly, for example, the pressure-sensitive adhesive tape described in Japanese Patent Laid-Open No. 2,695,8, 4, 4 belongs to such a pressure-sensitive adhesive tape. In such a pressure-sensitive adhesive tape, when cut by a cutting tool such as a scissors or a blade, the cutting tool may damage the adherend. For this reason, there is a need for a pressure-sensitive adhesive tape that can be easily and safely cut and has excellent working ability. In addition, in the hardening of the building or the hardening of the coating, it may be easy to cause the pressure-sensitive adhesive tape when the pressure-sensitive adhesive tape is released, the high-speed release type or the low-temperature environment in winter. Breaking problem. This point is 5 312 / invention (supplement) / 92-12 / 92125728 1301795 belongs to the longitudinal tear strength problem (the tear resistance of the pressure-sensitive adhesive tape in the longitudinal direction). * SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a pressure-sensitive adhesive tape which has excellent hand-cutting properties and which can enhance the working ability at the time of cutting. Another object of the present invention is to provide a pressure-sensitive adhesive tape which can be broken and which has excellent hand-cutting properties, and which does not cause breakage even in the case of high-speed release type in a low-temperature environment. In order to achieve the aforementioned objectives, the inventors conducted active and thorough research. The physical properties of the relationship between the pressure-sensitive adhesive force and the strain which define the irregular shape of the surface of the support substrate are not only the pressure-sensitive adhesive tape but also have excellent hand-cutting properties and good working force during cutting. At the same time, the pressure-sensitive adhesive tape is not cut at the time of high-speed release, or the pressure-sensitive adhesive tape is cut off in a low-temperature environment, and the cutting process is not broken, so that the present invention has been completed. The invention relates in particular to a pressure-sensitive adhesive layer having a plastic support substrate and a pressure-sensitive adhesive layer formed on one side of the support substrate, the irregular portion being shaped to be straight with respect to the longitudinal direction The direction is extended, and the irregular portion is disposed on one side of the support substrate, wherein the maximum stress at an elongation of not more than 50% is greater than the breaking stress, and the elongation at break point is 100% to 300%. %. The pressure-sensitive adhesive tape preferably has a maximum elongation of 1 1 Newton / 10 mm or more when the elongation is not more than 50%. Further, the plastic film may be a film made of a resin-based resin, and the olefin-based resin preferably contains polyethylene and low-density polyethylene. In addition, the support substrate may have a transparent 312 / invention (repair) / 92-12 / 92125728 quality cut, or fruit hair should be cut to be able to adhere to the film at least the vertical crack point large olefin high density 0 6 1301795 [Embodiment] The pressure-sensitive adhesive tape of the present invention is characterized by a maximum stress of not more than 50% elongation, a stress greater than a breaking point, and an elongation at break of 100% to 300%. Further importantly, the pressure-sensitive adhesive tape of the present invention has a support substrate made of a plastic film, and the pressure-sensitive adhesive tape is formed on at least one side of the support substrate, and an irregular portion is shaped in relation to the longitudinal direction. The vertical direction extends and is disposed on one side of the support substrate. Since the pressure-sensitive adhesive tape of the present invention has the aforementioned configuration, it has excellent hand-cutting properties. For this reason, the pressure-sensitive adhesive tape of the present invention can be easily and safely cut by a finger without using a cutting tool such as scissors or a blade to cut. This avoids the cutting tool from damaging the adherend and greatly improves the ability to work when the cut is made. In addition, it is used for building hardening or coating hardening. After hardening, in the release process of the pressure-sensitive adhesive tape, even if it is separated by high-speed release or in a low-temperature environment, the pressure-sensitive adhesive tape can be prevented from breaking during the release process. Or cut with a perfect freehand cut. The pressure-sensitive adhesive tape of the present invention is specifically described using a stress-strain curve as needed. Fig. 1 is a graph showing a stress-strain curve of an embodiment of a pressure-sensitive adhesive tape relating to the present invention. In the present stress-strain curve, the ordinate indicates the stress (Newton / 10 mm), and the abscissa indicates the tensile elongation (%). According to the stress-strain curve of Fig. 1, when the tensile elongation rate increases from 0% to about 50%, the stress rises rapidly; then, as the tensile elongation increases, the stress slowly decreases; the pressure-sensitive adhesive tape is The elongation at a tensile elongation of about 150% causes breakage. Therefore, the present invention is (1) the maximum stress of elongation not greater than 50%, which is greater than the stress of the fracture point; and (2) the elongation of the fracture point is from 100% to 3,0,7,312, Book (Supplement) / 92-12/92125728 1301795 In the stress-strain curve according to Figure 1, the stress has a significant peak in the range of elongation not more than 50%; but the stress-strain curve as shown in Figure 2 The stress does not have a significant spike. Fig. 2 is a graph showing stress-strain curves of other embodiments of the pressure-sensitive adhesive tape of the present invention. • In addition to the stress-strain curve according to Figure 1, after reaching the spike (or maximum), the stress slowly decreases with increasing elongation; however, as shown by the stress-strain curve according to Figure 2, the stress Maintain substantial balance. In the present invention, as long as the maximum stress at an elongation of not more than 50% is greater than the stress at the breaking point, the difference or ratio between the maximum stress at which the elongation is not more than 50% and the stress at the breaking point is not particularly limited. As the difference between the maximum stress and the fracture point stress at which the elongation is not more than 50 ° / ,, for example, it is desirable that the value of [(the maximum stress of elongation not more than 50%) - (break point stress)] is 0 · 1 Newton / 10 mm or more (for example, 0.1 to 7 Newtons / 10 mm, preferably 0 · 5 to 5 Newtons / 10 mm, and more preferably 1 to 3 Newtons / 10 mm). When the maximum stress at an elongation of not more than 50% is less than the stress at the breaking point, the freehand cutting property is degraded. Further, the value of the maximum stress (absolute value) having an elongation of not more than 50% is not particularly limited, but is desirably 1 1 Newton / 10 mm or more (for example, 1 1 to 2 5 Newtons / 10 mm, preferably 1 2 to 2 5 Newtons / 10 mm and better 1 3 to 2 5 Newtons / 1 0 mils). When the maximum stress value of the elongation of not more than 50% is less than 1 1 Newton / 10 mm, after the hardening, the pressure-sensitive adhesive tape is easily broken during the release process of the pressure-sensitive adhesive tape. In addition, the elongation at break point is from 100% to 300% (preferably from 10% to 2,500%/min, more preferably from 120% to 250% and particularly preferably from 150% to 2 0 0 % ). When the elongation at break point exceeds 300%, the uncutting property decreases; and when the break point reaches 8 312 / the invention (repair) / 92-12/92125728 1301795, the rate is less than 1 ο ο % The pressure-bonding tape is easily broken during the release process. In the present invention, the stress-strain curve of the pressure-sensitive adhesive tape is obtained by the gap between the chucks of 50 mm and the stress rate of 1,0 0 mm/min, at room temperature (23 ° C) and at 6 5 Under the condition of % relative humidity, a tensile tester (tester name: Shimadzu automatic plotter, manufactured by Shimadzu Corporation) was used to measure the stress of the pressure-sensitive adhesive tape with a width of 10 mm. The stress when the partial pressure-sensitive adhesive tape is cracked during the stretching process is defined as the stress at the fracture point. Similarly, the elongation at the time of partial pressure-sensitive adhesive tape cracking is defined as the elongation at break point. As described above, the pressure-sensitive adhesive tape of the present invention has a support substrate made of a plastic film, and a pressure-sensitive adhesive tape is formed on at least one side of the support substrate. Further, the pressure-sensitive adhesive tape of the present invention has an irregular portion which is formed to extend in a direction perpendicular to the longitudinal direction on one side of the support substrate. The pressure-sensitive adhesive tape has the aforementioned composition and conforms to the aforementioned physical properties. The formulation of the plastic film as the support substrate and the formulation of the pressure-sensitive adhesive for the pressure-sensitive adhesive layer are not particularly limited. The plastic film material as the support substrate includes, for example, an olefin-based resin such as a polypropylene-based resin (such as polypropylene) and a polyethylene-based resin (for example, high-density polyethylene, medium-density polyethylene, and low). Density polyethylene, linear low density, ultra low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and ethylene-propylene copolymer; and thermoplastic elastomer. The plastic film material may be used alone or in combination of two or more materials. As for the plastic film material, an olefin-based resin is preferred, and a polyethylene-based resin is particularly preferred. In the present invention, the polyethylene-based resin is suitably a suitable mixed resin comprising a combination of high-density polyethylene and low-density polyethylene 9 312 / invention (supplement) / 92-12 / 92125728 1301795 (mixture). In other words, the polyolefin-based resin contains high-density polyethylene and low-density polyethylene. In the case of such a mixed resin, the ratio of high density polyethylene to low density polyethylene is expressed, and the ratio of high density polyethylene to low density polyethylene is, for example, selected from 10 / 90 to 90 / 1 0 (better 2) The range of 0 / 8 0 to 5 0 / 5 0 ). The high density polyethylene preferably has a density of from 0.940 g/cm to 0.970 g/cm, and particularly preferably has a density of from 0.950 g/cm to 0.965 g/cc. On the other hand, the low density polyethylene preferably has a density of from 0.880 g/cm to 0.930 g/cm, and particularly preferably has a density of from 0.910 g/cm to 0.992 g/cm. These densities are measured values according to J I S K 7 1 1 2 . The plastic film may contain additives [e.g., fillers, colorants (e.g., pigments and dyes), anti-aging agents, and plasticizers]. In order to promote the hand-cutting property of the pressure-sensitive adhesive tape, a filler such as calcium carbonate may be contained in a plastic film at a weight ratio of 10 parts by weight or more based on 100 parts by weight of the resin constituting the plastic film. In the present invention, it is not always necessary to add a filler made of such an inorganic compound. Rather, from the standpoint of controlling the brittle fracture at low temperatures, it is preferred that no filler be mixed with the plastic film. However, when a plurality of fillers are used to provide properties other than the hand-cutting property, the filler can be mixed. Other effects other than the nature of the hand-cutting include, for example, flame retardancy, light resistance, heat resistance, thermal deformation, and rigidity. In this case, the filler is preferably used in an amount of not more than 5 parts by weight (preferably 1 to 3 parts by weight) based on 100 parts by weight of the resin constituting the plastic film. In the present invention, the irregular portion having a shape extending in the width direction (vertical direction with respect to the longitudinal direction) is formed on one side of the plastic film as the support substrate 10 312 / invention (supplement) / 92-12 / 92125728 1301795 on the surface. The shape of such irregularities is not particularly limited and includes, for example, a conical shape, a triangular pyramid shape, a quadrangular pyramid shape, a hemispherical shape, a cylindrical shape, a triangular prism shape, and a quadrangular prism shape. The irregular portion is mainly formed to extend in the width direction of the plastic film (in the vertical direction with respect to the longitudinal direction), and the irregular portion may be in any state. For example, when the shape of the concave portion is a conical shape, a triangular pyramid shape, a quadrangular pyramid shape or a hemispherical shape, a plurality of concave portions having a conical shape, a triangular pyramid shape, a quadrangular pyramid shape or a hemispherical shape are formed in the width direction, and thus are integrally formed. A concave portion of the shape extending in the width direction. Further, when the shape of the recess is a cylindrical shape, a triangular prism shape or a quadrangular prism shape, the cylindrical shape, the triangular prism shape or the quadrangular prism shaped recess itself is formed in a shape extending in the width direction. The shape of the irregular portion is such that not only one concave portion extends in the width direction but also a shape in which a plurality of concave portions are combined in the width direction. In the present invention, it is preferred that the irregularities are provided in a linear state or a curved state (e.g., a saw tooth form and a wave form). For example, as shown in Figs. 3A and 3B, the shape in which the linear recess is formed in the width direction is shown. 3A and 3B are each a schematic view, partially showing an example of a plastic film structure constituting the pressure-sensitive adhesive tape of the present invention, wherein Fig. 3A is a plan view from above, and Fig. 3B is a cross-sectional view. In Figs. 3A and 3B, a linear recess having a quadrangular cylindrical section is provided in the width direction of the elongated plastic sheet. 3 and 3B, L denotes a plastic film; denotes a concave portion; L denotes a width of the concave portion 2; k denotes a separation distance of the concave portion 2; L denotes a depth of the concave portion 2; indicates a longitudinal direction of the plastic film 1, and indicates a plastic film 1 Width direction. The size (size) of the irregular portion is not particularly limited. For example, the depth h of the recess is about 0.02 to 0.15 mm (preferably 0. 4 mm to 0.12 mm). When 11 312 / invention (repair) / 92-12 / 92125728 1301795 recess depth is less than 0. 2 2 mm, although the longitudinal tear strength in the longitudinal direction of the pressure-sensitive adhesive tape increases, the free-handed nature of the width direction may be decline. 5毫米的范围内。 The width of the recess (d) is not particularly limited, for example, may be selected from the range of about 0. 0 1 to 0. 5 mm (preferably about 0. 0 1 mm to 0. 2 mm). Further, the distance (L) of the recesses is not particularly limited, but may be, for example, selected from the range of about 0.5 mm to 5 mm (preferably 0 · 6 mm to 1.4 mm). The method of forming the irregular portion includes, for example, a method in which a resin in a molten state pressurizes a forming roll having an irregular relief thereon, thereby transporting an irregular shape to a resin; and a method in which after forming a plastic film, The plastic film pressurizes the roller having an irregular shape. Therefore, an irregular shape is formed on the plastic film. The method of forming the irregularities may be selected from known methods or conventional methods depending on the predetermined shape of the irregularities. The plastic film surface (one side or two sides) can accept a variety of known or conventional surface finishes, including corona discharge treatment, undercoat treatment, and reverse processing. The plastic film thickness (total thickness) is not particularly limited and may be, for example, selected from the range of about 20 μm to 300 μm (preferably 50 μm to 200 μm and more preferably 70 μm to 150 μm). . The support substrate may have any one of a single layer or a plurality of layers. The support substrate or plastic film may be transparent or opaque, but preferably the support substrate or plastic film is transparent. The pressure-sensitive adhesive layer is formed on at least one side of the support substrate made of such a plastic film. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, but a plurality of pressure-sensitive adhesives can be used, and the pressure-sensitive adhesives can be classified, for example, as 12 312 / invention (supplement) / 92-12 /92125728 1301795 A rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a pressure sensitive adhesive mainly composed of polyoxyn oxide, and a pressure sensitive adhesive mainly composed of urethane. The pressure-sensitive adhesive may be selected from known or conventional pressure-sensitive adhesives depending on the adherend, the purpose of use, and the like. The pressure-sensitive adhesive may be used singly or in combination of two or more. The pressure-sensitive adhesive layer may be formed on at least one side of the support substrate, and one side of the support substrate has an irregular portion. The forming method is a method in which the pressure-sensitive adhesive is directly applied to at least one side of the support substrate. (on one side or both sides); or a method in which a pressure sensitive adhesive is applied to the spacer and the pressure sensitive adhesive on the spacer is transferred to the support substrate. When the pressure-sensitive adhesive layer is formed on one side of the support substrate, the pressure-sensitive adhesive layer may be formed on the side of the support substrate on which the irregular portion is not formed, or formed on the support substrate to form an irregular portion. On the side. In the present invention, it is preferred that the pressure-sensitive adhesive layer is formed on the side surface of the support substrate where the irregularities are not formed. In this case, the side surface of the support substrate forming the irregular portion can serve as a release side of the pressure-sensitive adhesive tape wound in a roll shape. Incidentally, when applying the pressure sensitive adhesive, a conventional coating machine such as a gravure coater, a reverse roll coater, a contact roll coater, a dip coater, a rod coater may be used. Covering machine, knife coating machine and spray coating machine. The pressure-sensitive adhesive layer thickness (total thickness) is not particularly limited, but may be, for example, selected from the range of about 1 μm to 100 μm (preferably 5 μm to 50 μm, more preferably 15 μm to 40 μm). The pressure-sensitive adhesive tape of the present invention can be used as a pressure-sensitive adhesive tape wound into a roll shape. The surface of the pressure-sensitive adhesive layer can be protected by a spacer. The pressure-sensitive adhesive tape according to the present invention provides excellent hand-cutting properties, 13 312/invention (supplement)/92-12/92125728 1301795 and the ability to work during cutting. Further, the pressure-sensitive adhesive of the present invention can be cut even in the case of high-speed release or in the case of a low-temperature environment, and has excellent hand-cutting properties without causing breakage. The invention will be described hereinafter with reference to the following examples, but the invention is not construed as being limited to the embodiments. All parts are in parts by weight. (Materials used) • Low-density polyethylene (hereinafter sometimes referred to as “LDPE”): (1) Trade name: “Sumikathene G201” (manufactured by Sumitomo Chemical Co., Ltd., density: 0.9) 1 9 g / cm 3 (hereinafter sometimes referred to as " LDPE - 1 ".) (2) Trade name: "Combikaxin F2 18-0" (manufactured by Sumitomo Chemical Co., Ltd., density · · 0.99 9 g /cubic centimeters (hereinafter sometimes referred to as "LDPE-2,, ° (3) trade name: "Campusin G 4 0 1" (manufactured by Sumitomo Chemical Co., Ltd., density: 0.926 g / cm3 (hereinafter) It is called "LDPE - 3,. (4) Trade name: "Combikaxin F1 02-0" (manufactured by Sumitomo Chemical Co., Ltd., density: 0.92 2 g / cm 3 (hereinafter sometimes referred to as “LDPE-4” • High-density polyethylene (hereinafter sometimes referred to as “HDPE”): (1) Product name··Hizex 2200J (manufactured by Mitsui Chemicals, Inc., density·· 0. 9 6 4 g / cm 3 (hereinafter sometimes referred to as "HDPE - 1". (2) Product name: "Haizi West 5 0 0 SF" (Mitsui Made by the company, density: 0.956 g / cm3 (hereinafter sometimes referred to as 14 312 / invention book (supplement) / 92-12/92125728 1301795 " HDPE - 2, ' ° • filler: (l) Inorganic filler (light-precipitated calcium carbonate, manufactured by Tsuchiya Calcium Co., Ltd.) (Example 1) LDPE and HDPE were dry-blended in the ratio shown in Table 1 to prepare a mixed resin composition, and then the composition was extruded using an extruder. A plastic film is prepared by extruding at a mold temperature of 2 60 ° C. The plastic film is pressed against a roller having an irregular relief portion, and a plastic film (tape substrate) is prepared, and the total thickness of the plastic film is 0. 1 0 0 Mm, the depth of the recess (groove) is 0. 0 4 mm, the width of the recess is 0 · 200 mm, and the distance between the irregularities (the distance between the recesses) is 1.0 mm, as shown in Fig. 3 A And 3 B. One side of the strip substrate (support substrate) (the side surface where the recess is not formed) is subjected to a corona discharge treatment, and an acrylic pressure sensitive adhesive is applied to the side subjected to corona discharge treatment Upper (thickness after drying: 30 μm) and then wound into a roll to prepare a wound into a roll Pressure-sensitive adhesive tape. (Examples 2 to 4) The belt-like substrate was prepared in the same manner as in Example 1, except that the ratio of LDPE and HDPE used was as shown in Table 1. Further, according to the same procedure as in Example 1 A pressure-sensitive adhesive tape wound into a roll shape is prepared. (Comparative Examples 1 to 6) A belt-shaped substrate was prepared in the same manner as in Example 1 except that the ratio of L D P E to H D P E shown in Table 2 was employed. In Comparative Example 6 (in the case of a mixed filler), the filler was premixed with H D Ρ L or L D Ρ Ε to prepare a master batch. Subsequently, the same procedure as in Example 1 was followed to prepare a pressure-sensitive adhesive tape wound into a roll shape. Only in Comparative Example 6, the mold temperature was 1 90 °C. 15 312/invention (supplement)/92-12/92125728 1301795 Table 1 Example 1 2 3 4 LDPE: LDPE-1 50 70 80 LDPE-2 50 LDPE-3 LDPE-4 HDPE : HDPE-1 50 30 20 50 HDPE-2 Inorganic Filler Table 2 Comparative Example 1 2 3 4 5 6 LDPE : LDPE-1 50 LDPE-2 LDPE-3 70 LDPE-4 70 7 0 1 00 HDPE : HDPE-1 30 100 30 50 HDPE- 2 30 Inorganic filler 10 (Comparative method) The pressure-sensitive adhesive tapes obtained in Examples 1 to 4 and Comparative Examples 1 to 6 were each cut into a prescribed width (width of 100 mm, width of 25 mm, using a commercially available cutter). A width of 6 3 mm, etc.) to prepare the test piece. The test piece was subjected to the following tensile test and resistance, tear test, and tensile strength characteristics and tear characteristics. The results of the comparison are shown in Table 3 or 4. (Tensile test) The stress measurement method of the pressure-sensitive adhesive tape with a width of 10 mm is to use a tensile tester for the pressure-sensitive adhesive tape (test machine name: Shimadzu automatic plotter, manufactured by Shimadzu Corporation), at a gap of 5 0 mm, and a stress rate of 1,0 0 0 mm/min at room temperature (23 ° C) and 6 5 % relative humidity stretching 16 312 / invention (supplement) / 92-12 / 92125728 1301795 Determination. During stretching, the stress when part of the pressure-sensitive adhesive tape is broken is defined as the stress at the breaking point; similarly, the elongation when the partial pressure-sensitive adhesive tape is broken is defined as the elongation at break. Incidentally, the stress-strain curve of the pressure-sensitive adhesive tape of Example 1 is shown in FIG. 1; the stress-strain curve of the pressure-sensitive adhesive tape of Example 2 is shown in FIG. 2; the pressure-sensitive adhesive tape of Example 3. The stress-strain curve is shown in Fig. 4; and the stress-strain curve of the pressure-sensitive adhesive tape of Example 4 is shown in Fig. 5. Further, the stress-strain curves of the pressure-sensitive adhesive tapes of Comparative Examples 1 to 6 are shown in Figs. 6 to 11 respectively. In addition, a 25 mm wide pressure-sensitive adhesive tape is adhered to a commercially available floor with a length of 300 mm. Adhesive conditions are room temperature (23 ° C) and 65 % relative humidity, and further provide a front length of 100. In millimeters, the pressure-sensitive adhesive tape is peeled off (three times in total) at a tear angle of about 30 degrees and a tearing speed of about 1,0 mm mm/min. The pressure-sensitive adhesive tape was evaluated for longitudinal tear strength according to the following evaluation criteria. (Standard for longitudinal tear strength) 〇: Peeling can be carried out all three times without causing breakage during the tearing process. △: It can be peeled off twice without causing breakage. X •• Can only be peeled off once, or all three times. (Tear-Resistant Test) A pressure-sensitive adhesive tape with a width of 6 mm is used at room temperature (23 ° C) and 6 5 % relative humidity without a notch. E 1 mend 〇rf The tear resistance tester (manufactured by Sanyo Co., Ltd.) measures the tear resistance and the evaluation tear property. In addition, a hand-cut test (testing 17 312/invention (fix)/92-12/92125728 1301795 with a finger-cutting pressure-sensitive adhesive tape) was performed five times as a sensory perception test, and a tear was evaluated according to the following criteria. Sex, quality (sensory perception test). (The standard of tearing property by sensory perception test) 〇: All five pressure-sensitive adhesive tapes are easily cut by fingers. △: The pressure-sensitive adhesive tape is easily cut four times with a finger. X: The pressure-sensitive adhesive tape is not easily cut by fingers more than three times. Table 3 Example 1 2 3 4 Tensile properties: Maximum stress in the range of elongation not more than 50% (Newtons / 10 mm) 18 16.1 15.6 17.6 Fracture stress (Newtons / 10 mm) 14.9 15.3 15.4 14. 7 Breaking point Elongation (%) 151 154 231 109 Evaluation of longitudinal tear strength (sensory perception test) 〇〇〇〇 Tearing characteristics: Emmandorf anti-shear test (Newton) 0.96 1.12 1.60 1.12 Sense of perceptual test 〇〇〇〇 Table 4 Comparative Example 1 2 3 4 5 6 Tensile characteristics: Maximum stress in the range of elongation not more than 50% (Newton / 10 mm) 17. 3 23 15.4 7. 9 13. 5 17. 1 Stress (Newtons/10 mm) 21. 1 36. 4 20.3 10 12 16. 1 Elongation at break point (%) 387 1,096 261 269 86 66 Approximate longitudinal tear strength (sensory perception test) 〇〇〇X Δ Δ tear characteristics: Emmandoff tear test (Newton) uncut uncut, uncut, uncut, 0. 64 5. 12 by sensory perception test, evaluation of tear properties XXXX 〇Δ by Table 3 and 1, 2, 4 and 5, obviously The maximum stress of the pressure-sensitive adhesive tape of Examples 1 to 4 in the range of elongation not more than 50% is greater than the stress of the fracture point, and the maximum stress in the range of elongation not more than 50% is 1 1 Newton 18 312 / invention Book (supplement) / 92-12 / 92125728 1301795 / 10 mm or more, the elongation at break is 1 0 0% to 300%. Further, the pressure-sensitive adhesive tapes according to Examples 1 to 4 have a good hand-cutting property, and can be easily and stably peeled off without causing breakage in the middle. On the other hand, according to the pressure-sensitive adhesive tapes of Comparative Examples 1 and 2, the maximum stress in the range of elongation not more than 50% was smaller than the stress at the breaking point, and the elongation at break was more than 30,000. These pressure-sensitive adhesive tapes cannot be cut by fingers. According to the pressure-sensitive adhesive tapes of Comparative Examples 3 and 4, although the elongation at break point was less than 30,000, the maximum stress in the range of elongation not more than 50% was smaller than the stress at the fracture point. These pressure-sensitive adhesive tapes cannot be cut by fingers. In the pressure-sensitive adhesive tapes according to Comparative Examples 5 and 6, although the maximum stress in the range of elongation not more than 50% was larger than the stress at the breaking point, the elongation at break was less than 100%. These pressure-sensitive adhesive tapes are easily broken in the longitudinal direction. While the present invention has been described with reference to the specific embodiments thereof, various modifications and changes may be made by those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Example 1. Fig. 2 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Example 2. 3 and 3 are each a schematic view, partially showing an example of a plastic film structure constituting the pressure-sensitive adhesive tape of the present invention, wherein FIG. 3A is a plan view from above, and FIG. 3B is a cross-sectional view. Fig. 4 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Example 3. Fig. 5 shows a stress-strain curve of the pressure-sensitive adhesive tape of Example 4 19 312 / invention (supplement) / 92-12 / 92125728 1301795. Fig. 6 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Comparative Example 1. Fig. 7 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Comparative Example 2. Fig. 8 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Comparative Example 3. Fig. 9 is a graph showing the stress-strain curve of the pressure-sensitive adhesive tape of Comparative Example 4. Fig. 1 shows a stress-strain curve of the pressure-sensitive adhesive tape of Comparative Example 5. Fig. 1 1 shows a stress-strain curve of the pressure-sensitive adhesive tape of Comparative Example 6. (Description of component symbols) 1 Plastic film 2 Recessed part d Width of recessed part 2 Distance of recessed part 2 h Depth of recessed part 2 Length of plastic film 1 Y Width direction of plastic film · 20 312 / Invention book (supplement) / 92-12/92125728