201136762 六、發明說明： 【發明所屬之技術領域】 • 本發明係關於使用在光學製品、建材、汽車 * - 保護薄膜。詳言之，本發明係關於黏著特性、透=等的表面 性優異’對被黏著體等之污染少，且薄膜從捲取::生、耐熱 態轉出時的轉出容易性（以下稱為「轉出性〜昆狀之狀 護薄膜。 」)優異之表面保 【先前技術】 表面保護賴主要係貼附於建材用或光學用途之樹 -品、金屬製品、玻璃製品等的被轉體而使用，具有防止： 等之輸送、保管或加工時的刮傷或異物混人之作用。該等表 面保護薄膜一般係由不具黏著性之表面層與用以與Γ述被 黏著體黏著之黏著層所構成。表面層通常係由聚乙稀或聚丙 烯等之聚烯烴、絲對苯二甲H等之《、聚氣乙烯 專之乙稀糸聚合體所形成。 近年來使用於液曰曰顯不器、電聚顯示器（pDp)或背投影 式(rear-P_Cti〇n)顯示器等構件(所謂的光學製品)之開發持 •續進行。對於用以保護該等光學製品之表面保護薄膜，不僅 、要求防止顺與異物混人，料望可在_表㈣護薄膜之 狀態下進行製品檢查之程度的透明性等特性。 又將表面保”蒦薄膜使用於建材或汽車零件用途之情況， 係有在貼附表面倾薄膜之狀態下進行熱成形之情況，要求 100103882 201136762 在…皿狀態下亦可作為表面保護薄膜使用之高度耐熱性。 a著力較回的表面保護薄膜由於不具充分的轉出性， 故係作成對黏著層貼合離型薄膜並料捲取之輕狀態，當對 被㈣體進行貼附時再將該離型薄膜剝下而使用。若採用此 種手由於會產生大量的離型薄麟為廢棄物，故要求即 使不使用離型薄膜係具有充分的轉出性之表面保護薄膜。 *專利文獻1中係揭示以聚乙稀成分為主體之表面保護薄 膜。然而，該公報之保護薄膜雖可應用於一部分的用途構 材，但黏著力低且制性亦不充分，於被㈣體之用途方面 有限制。 專利.文獻2中係揭示由使用特定樹脂組成物所獲得之背 面層及黏著層所構成之保護薄膜^ _，該公報之保護薄膜 中，對魚眼(fisheye)產生之防止並不充分，尤其在作為光學 構件等之保護薄膜而使用之情況，亦有對被黏著體產生不良 影響之虞’需要改良。 [專利文獻] 專利文獻1:日本專利特開2006_116769號公報 專利文獻2:日本專利特開2〇〇9_28938號公報 【發明内容】 (發明所欲解決之問題） 本發明之課題在於提供一種表面保護薄膜，其在光學製 品、建材製品或汽車零件之保管、輸送、加工、檢查時，在 100103882 4 201136762 作為用以保言蒦兮望+ + a — 这等之表面保護薄膜所要求之特性方面，尤其 疋黏者特性、读明从 ,、耐熱性及轉出性方面優異。 (解決問題之手段） 奸本發明人等有於上述問題，經過深人檢討，結果發現， …’、有由某特^之樹脂組成物所構成的表面層之表面保 蒦4膜可解決上述問題，遂完成本發明。 亦P本發明係由表面層（A)及黏著層（X)之至少2層所構 ^*之^保_膜’表面層（A)係由丙烯系聚合體所構成， 且表面層之表面粗度(Ra)係0.2〜2.0/mi之範圍。 此外’本發明之較佳態樣係相對於壓克力的黏著力為 50nmi以上之上述表面保護薄膜，此外，係黏著層（X)為 由稀煙系彈性體及/或笨乙射、彈性體所形成之上述表面保 護薄膜。 (發明效果） 本發明之表面保護薄膜之黏著特性、透明性、從捲取為輥 狀之狀態的轉出性及耐熱性優異，適合作為光學用途、建材 用途、汽車零件用途之表面保護薄膜。 【實施方式】 接者’洋細說明本發明。 本發明之表面保護薄膜係由表面層（A)及黏著層（χ)之至 J 2層所構成。 表面層（Α)係由丙烯系聚合體所構成。 100103882 5 201136762 作為丙烯系聚合體，例如可舉出丙烯均聚物、丙烯與乙烯 及/或碳數4〜20之烯烴的無規或嵌段共聚合體。 作為使用於上述無規或嵌段共聚合體之碳數4〜20之ce-烯 烴，可舉出1-丁烯、4_曱基戊烯_丨、丨_己烯、丨_辛烯等。作 為此種共聚合體，可舉出丙烯•乙烯共聚合體、丙烯· i — 丁烯共聚合體、丙烯•乙烯·丨_丁烯共聚合體等。 丙烯系聚合體從提升耐熱性之觀點而言，熔點較佳為 50〜170C，更佳為70〜170。(：，更佳為1〇〇〜165¾，又以 130〜165°C為最佳。在此，熔點係利用示差掃瞄熱量計 (DSC)，以升溫及降溫速度1(rc/min所測定之值。 又，丙烯系聚合體以230。(：測定之熔融流動速率（以下簡 記為MFR)較佳為0.01〜5〇〇g/1〇分鐘，更佳為〇丨〜丨⑽岁⑺ 分鐘，再更佳為0.3〜5〇g/l〇分鐘之範圍。 上述丙烯系聚合體，不僅是以固體狀鈦化合物及烷基鋁化 合物作為主成分之固體狀鈦觸媒，亦可以茂金屬化合物作為 主成分，在茂金屬觸媒、幾何拘束觸媒等之存在下，將丙烯 之均聚物或丙烯與乙烯及/或碳數4〜2〇之仏烯烴進行共聚 合而獲得。 本發明之表面保護薄财，由透明性及轉纽之觀點而 言，由上述丙稀聚合體所構成之表面層⑷的表面粗度㈣ 係為0.2〜2鄭m之範圍。其中，表面粗度㈣較佳為〇 3㈣ 以上’更佳為〇·4阳以上°又’表面粗度_較佳為L5㈣ 100103882 6 201136762 以下，更佳為_以下1上述表面粗度未滿q —201136762 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to an optical article, a building material, an automobile*-protective film. In particular, the present invention relates to excellent surface properties of adhesion characteristics, penetration, etc., which are less likely to be contaminated by an adherend or the like, and the film is ejected from the coiling:: raw, heat-resistant state (hereinafter referred to as "Excellent surface protection" [Previous technology] Surface protection depends mainly on the transfer of trees, products, metal products, glass products, etc. for building materials or optical applications. It is used for the purpose of preventing the scratching or foreign matter mixing during transportation, storage or processing. These surface protective films are generally composed of a non-adhesive surface layer and an adhesive layer for adhering to the adherend. The surface layer is usually formed of a polyolefin such as polyethylene or polypropylene, or a polyethylene terephthalate polymer such as a polyethylene terephthalate. In recent years, the development of components such as liquid helium display, electro-convex display (pDp) or rear-projection (rear-P_Cti〇n) displays (so-called optical products) has continued. In the surface protective film for protecting these optical products, it is required to prevent not only the foreign matter from being mixed with the foreign matter, but also the transparency such as the degree of transparency of the product in the state of the protective film. In addition, when the surface is used for the use of building materials or automobile parts, it is subjected to hot forming in the state where the surface is adhered to the film. The requirement is 100103882 201136762, which can also be used as a surface protective film in the state of the dish. Highly heat-resistant. A surface protection film with less stress is not fully retractable, so it is used to bond the release film to the adhesive layer and take it lightly. When attaching to the (four) body, The release film is used for peeling off. If such a hand is used, a large amount of release liner is used as waste, so that a surface protective film having sufficient transferability without using a release film is required. In the first aspect, a surface protective film mainly composed of a polyethylene component is disclosed. However, although the protective film of the publication can be applied to a part of a use material, the adhesion is low and the system property is insufficient, and the use of the (four) body is There is a limitation in the aspect. Patent 2 discloses a protective film composed of a back layer and an adhesive layer obtained by using a specific resin composition, in the protective film of the publication, The prevention of the occurrence of the fisheye is not sufficient, and in particular, when it is used as a protective film such as an optical member, there is a need to improve the adhesive body. [Patent Document] Patent Document 1: Japan SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION The object of the present invention is to provide a surface protective film which is used in optical products and building materials. Or the storage, transportation, processing, and inspection of automobile parts, in 100103882 4 201136762, as a feature to protect the surface protection film, especially the characteristics of the surface protection film, especially the characteristics of the adhesive, read from Excellent in heat resistance and transferability. (A means to solve the problem) The inventor of the present invention has the above problems. After a thorough review, it was found that ...', there is a composition of a certain resin. The surface layer 4 film of the surface layer can solve the above problems, and the present invention has been completed. The invention is also composed of at least two layers of the surface layer (A) and the adhesive layer (X). The surface layer (A) of the film is composed of a propylene-based polymer, and the surface roughness (Ra) of the surface layer is in the range of 0.2 to 2.0/mi. Further, the preferred aspect of the present invention is relative to the pressure. The above-mentioned surface protective film having a bonding force of 50 nmi or more, and the adhesive layer (X) is the above-mentioned surface protective film formed of a thin-smoke-type elastomer and/or a stupid and an elastomer. The surface protective film of the present invention is excellent in adhesion property, transparency, and roll-out property and heat resistance in a state of being wound into a roll, and is suitable as a surface protective film for optical applications, building materials, and automotive parts. The present invention is described in detail. The surface protective film of the present invention is composed of a surface layer (A) and an adhesive layer (χ) to a J 2 layer. The surface layer (Α) is composed of a propylene-based polymer. 100103882 5 201136762 Examples of the propylene-based polymer include a propylene homopolymer, a random or block copolymer of propylene and ethylene, and/or an olefin having 4 to 20 carbon atoms. Examples of the ce-olefin having 4 to 20 carbon atoms used in the above-mentioned random or block copolymer include 1-butene, 4-nonylpentene-ruthenium, ruthenium-hexene, and oxime-octene. Examples of such a copolymer include a propylene/ethylene copolymer, a propylene·i-butene copolymer, and a propylene/ethylene/germanium-butene copolymer. The propylene-based polymer preferably has a melting point of from 50 to 170C, more preferably from 70 to 170, from the viewpoint of improving heat resistance. (:, preferably 1〇〇~1653⁄4, and preferably 130~165°C. Here, the melting point is measured by a differential scanning calorimeter (DSC) at a temperature rise and a temperature drop rate of 1 (rc/min). Further, the propylene-based polymer is 230. (The measured melt flow rate (hereinafter abbreviated as MFR) is preferably 0.01 to 5 〇〇 g / 1 〇 minutes, more preferably 〇丨 ~ 丨 (10) years (7) minutes. More preferably, it is in the range of 0.3 to 5 〇g/l 〇 minutes. The propylene-based polymer is not only a solid titanium catalyst having a solid titanium compound or an alkyl aluminum compound as a main component, but also a metallocene compound. The main component is obtained by copolymerizing a homopolymer of propylene or propylene with ethylene and/or a terpene olefin having 4 to 2 carbon atoms in the presence of a metallocene catalyst or a geometrically binding catalyst. The surface protection is thin, and from the viewpoint of transparency and transition, the surface roughness (4) of the surface layer (4) composed of the above-mentioned acryl polymer is in the range of 0.2 to 2 mm, wherein the surface roughness (four) is佳为〇3(四) Above 'better is 〇·4 yang or more °' surface roughness _ preferably L5 (four) 100103882 6 201136762 or less, more preferably _ below 1 the above surface roughness is less than q —
難以將表面層從黏著層予以剝離，轉出性降低。另H 若上述表面粗度超過2.0_，則由於光線之散亂反射，無法 獲得充分的透明性。 作為形成上述表面層之表面粗度的方法，並無特別限制， 可使用將印花_印至表面層㈣成表面粗度之方法， 由改變上述丙烯线合體之分子量—㈣表面料It is difficult to peel the surface layer from the adhesive layer, and the turn-off property is lowered. In addition, if the surface roughness exceeds 2.0 mm, sufficient transparency cannot be obtained due to scattered reflection of light. The method for forming the surface roughness of the surface layer is not particularly limited, and a method of changing the molecular weight of the propylene wire to the surface layer (four) can be used.
之方法。從生產性之觀點而言，較佳係採㈣㈣烯“ I 體之分子量或組成的方法。為了實現較佳的表面粗度，Μ 出使用丙烯與乙烯之嵌段共聚合體（以下稱為「丙烯•⑽ 嵌段共聚合體」）作為丙烯系聚合體之例的方法H乙 稀嵌段共聚合體之驗⑽。C)錄為3〜2Gg/iQ分鐘更佳 為4〜15g/1G分鐘之丙烯•乙稀嵌段共聚合體中橡膠 成分之極限黏度（[r/])較佳為2.0dl/g以上。 作為表面層(A)使用之丙烯系聚合體中，在對本發明之表 面保護薄膜射抗靜電性或耐候性、提升透赚或提升外觀 之目的下，亦可添加抗靜電劑、離型劑、抗氧化劑、_劑、 結晶核劑等之純添加劑’或添加聚乙婦或聚丁烯等之其他 結晶性聚婦烴、聚[聚_、彈性體等之樹脂改質劑。 當視需要於上述丙烯系聚合體中添加添加劑或改質劑之 情況，例如可在添加添加解之後，以料或雙減出機或 進料控制機(fee—nuie⑽進行混練後，加卫為薄膜狀，亦 100103882 7 201136762 可直接放入兼具擠出機之τ字模成形機，製成本發明之表 面保護薄膜的表面層（Α)。 作為本發明之表面保護薄膜的黏著層（X)，只要係作為表 面保護薄臈的黏著層所使用之公知黏著劑，均可使用，從# 眼產生所造成之被黏著體的損傷或黏著劑對被黏著體之轉 移（亦即殘膠)之觀點而言，較佳係使用烯烴系彈性體及/或苯 乙稀系彈性體。更佳係稀煙系彈性體或由埽烴系彈性體與苯 乙烯系彈性體所構成之組成物。 作為稀烴系彈性體，較佳係DSC測々以升溫及降溫速度 1 曰〇°C/min㈣定)之熔點在〇〜2〇叱的範圍内#法觀測到的非 晶性彈性體’或可觀測到在G〜2G(rc之範圍内所觀測之炼點 波峰的炫解熱量為1〇J/g以下的波峰之微結晶性彈性體更 佳係上述非晶性彈性體或熔點波峰之熔解熱量為7J/g以下 的微結晶性彈性體。 作為上述烯烴系彈性體，係有碳數2〜2 〇之α_稀炫聚合體 或共聚合體，或者乙烯與我和麟或錢和紐自旨之共聚 合體。具體而言’可舉出乙烯·丙烯共聚合體、乙烯Μ_ 丁埽共聚合體、乙烯·丨_己稀共聚合體、乙H甲基戊烯 ]共聚合體、乙稀·卜辛稀共聚合體、丙_聚物、兩稀· 乙稀共聚合體、丙烯•乙烯· L丁烯共聚合體、i•丁蛾均聚 物、1-丁烯•乙烯共聚合體、卜丁烯•丙烯共聚合體、4_曱 基戊締·ι均聚物、4_甲基⑽」•丙稀共聚合體、心甲基戊 100103882 8 201136762 烯-1 · 1-丁烯共聚合體、4-甲基戊烯-1 ·丙烯· 1-丁烯共聚 合體、丙烯· 1-丁烯共聚合體、乙烯•醋酸乙烯酯共聚合 體、乙烯•曱基丙烯酸共聚合體、乙烯•曱基丙烯酸曱酯共 聚合體等。從黏著力之經時安定性的觀點而言，較佳為丙烯 均共聚合體、丙烯•乙烯共聚合體、丙烯·1-丁烯共聚合 體、丙烯•乙烯· 1-丁烯共聚合體。 作為苯乙烯系彈性體，可使用具有聚苯乙烯相作為硬鏈段 之公知苯乙烯系彈性體。具體而言，可舉出苯乙烯·丁二烯 共聚合體（SBR)、苯乙烯•異戊二烯•苯乙烯共聚合體 (SIS)、苯乙烯•丁二烯•苯乙烯共聚合體(SBS)、以及該等 之氫化物（SEBS、SEPS等）、苯乙烯•異丁烯•苯乙烯三嵌 段共聚合體(SIBS)、苯乙烯•異丁烯二嵌段共聚合體(SIB)。 從與被黏著體之黏著性及轉出性的觀點而言，較佳可舉出苯 乙烯·異丁烯.苯乙烯三嵌段共聚合體(SIBS)、苯乙烯•異 丁烯二嵌段共聚合體(SIB)。 藉由將上述烯烴系彈性體及/或苯乙烯系彈性體單獨或摻 合各自相異之組成成分，可形成本發明表面保護薄膜之黏著 層（X)。又，本發明中，在控制黏著力之目的下，可進一步 在不損及本發明效果之範圍内含有聚乙烯或聚丙烯等之聚 烯烴、酸改質聚烯烴、聚酯、聚醯胺等之樹脂改質劑，或抗 靜電劑、結晶核劑、抗氧化劑等之各種添加劑。 將上述烯烴系彈性體及/或苯乙烯系彈性體使用於形成本 100103882 9 201136762 發明表面保護薄膜之黏著層（X)的情況，由稀煙系彈性體 〇〜80重量％及苯乙料、彈性體2()〜議重量％所構成為佳， 更佳為稀烴系彈性體〇〜75重量％及苯乙稀系彈性體Μ〜刚 重量％’再更佳為婦烴系彈性體5〜75重量％及苯乙稀系彈 性體25〜95重量％所構成(黏著層中有視需要含有其他成分 之情況為了說明埽烴系彈性體與苯乙稀系彈性體之間的比 率，僅將該等之合計視為100重量％而表示）。 藉由將上輯㈣彈性體及/絲乙烯㈣Μ單獨或摻 合各自相異之組成成分並使用，可形成本發明表面保護薄膜 之黏著層⑻。又’黏著層⑻中，在控制黏著力之目的下， 可在不損及本發明效果之範圍内含有聚乙稀或聚丙稀等之 聚浠烴、酸改質聚烯烴、聚醋、聚醢胺等之樹脂改質劑，或 抗靜電劑、結晶核劑、抗氧化劑等之各種添加劑。 上述由烯烴系彈性體及/或苯乙烯系彈性體、以及視需要 之樹脂改質劑或添加劑所構成之黏著層（χ)，係藉由與上述 表面層（Α)積層，而可作成本發明之表面保護薄膜。 本發明之表面保護薄膜相對於壓克力板之黏著力係成為 轉出性及對㈣著體之黏著力的指標，較佳為㈣〇麵二 上，更佳為3〜4_50mm之範圍，再更佳為5〜麵/5〇賺 之圍。藉由使黏著力成為此種範圍，可維持良好的轉出 性，並表現出對各種被黏著體之黏著性。— 右泽占者力低於 1Ν/50ππη，則有對被黏著體之黏著性不充分之情況，若超過 100103882 10 201136762 40N/5〇mm财回捲性惡化之情況，較為不佳。 本發明表㈣護_之轉力係指將輥狀薄_出時之 剝離力，係為轉出性的指標，為了使其具有轉出性，該回捲 力較佳為2.5N/5Gmm以下，更佳為⑽丨〜2隱。軸之範圍。 對於積層表面層⑷與黏箸姻之方法並無特別限制，可 舉出於預先以T字模成形或充氣成形所得之表面層薄膜 上，利用擠出層疊、擠出塗佈等之公知積層法積層黏著層之 方法或將形成表面層及黏著層之薄膜各自獨立成形為薄膜 後’將各薄朗用乾式層衫以積層之方法等，從生產效率 之觀點而δ ’較佳係將表㈣、黏著層之各成分供至多層 出機而進行共擠出成形之方法。 本發明中’亦可在表面層㈧與黏著層(X)之間設置至少j 層的中間層。作為中間層並無特別限制…般可使用炫點 100以上之聚丙烯或聚乙烯等之結晶性聚烯烴，或聚酷、聚 醯胺、聚烯烴系彈性體等。將中間層使用作為接著層之情 况’可使用改質聚烯烴或聚烯烴系彈性體、笨乙烯系彈性 體、聚Sa彈性料。該等之中，從生產性及透明性之觀點而 言，較佳係使用聚丙烯或聚烯烴彈性體作為中間層。 又，當與表面層㈧及黏著層（X)之接著力不足的情況，中 間層亦可將接著劑或用以將表面層（A)與黏著層（X)接合之 薄膜等素材構成為接著層。 本發明表面保護薄膜之表面層（A)的厚度通常為 100103882 11 201136762 0.05〜2_m ’較佳為〇 5〜轉m，更佳為，再更佳 為1〜15/m1。黏著層（X)之厚度通常為0.05〜50μπι，較佳為 0·3〜40Mm，更佳為 〇 5〜3〇)Um。 因此’本發明之表面保護薄膜的厚度，包含視需要所設置 之中間層，通常為較佳為〇 5〜4〇〇㈣更佳為 3〜300μιη。 作為本發明表面保護薄膜之透明性，以了ISK71Q5為基準 以50μπι測定之霧值較佳為2〇〜9〇%的範圍，特佳a 3〇〜85% 之範圍。又’本發明之表面保護薄膜的魚眼數(FE數)較佳 為20個以下，更佳為10個以下、5個以下，其中又以3個 以下為最佳。 [實施例] 以下，利用貝加例詳細說明本發明，但本發明並不限定於 該等實施例。 [評估法] 表面粗度(Ra):將本發明之表面保護薄膜(本實施例中調 整為總厚度50微米（/xm))於氣溫23¾±2〇C、濕度50%土 10% 之條件下，硬化(curing)24小時，切取5〇mm見方作為薄膜 樣品’使用非接觸表面粗度計（型號： NT-2000SYSTEM·Veeco公司製）測定上述薄膜樣品。 黏著力：於氣溫23°C±2t：、濕度5〇。/〇士 1〇%之條件下，將 壓克力板裁斷為寬50mm、長i25mm，將薄膜樣品載置於上 100103882 12 201136762 述壓克力板表面’以2kg之橡膠輥的自身重量按壓該樣品薄 膜之整體，藉此貼附於壓克力板。接著，測定以300mm/分 鐘之速度制離（180度剝離）時的剝離力，以每5〇mm寬之剝 離力作為黏著力（N/50mm)。 回捲力：使用親狀樣品’測定以300mm/分鐘之速度從幸昆 剝除時之剝離力（N/50mm)，作為回捲力。 魚眼(FE):使用Ayaha Engineering製離線異物檢查裝置， 計數O.lmm以上尺寸之FE，作為每單位面積之FE數(個 /m2)。 霧值：以JISK7105為基準，以本發明之表面保護薄膜(本 實施例中為總厚度50μπι)進行測定。 [實施例1] 對兼具表面層及黏著層用為3 〇mm 0之單軸擠出機、中間 層為4〇mm0單軸擠出機的模頭寬5〇〇mm之3種3層τ字 模成形機，分別供給原材料，獲得由表面層厚度释爪、黏 著層厚度_、中間層厚度30卿所構成之總厚度獅 的本發明表聽㈣膜。賴得之表_護_的評估結果 。另外，構成實施例及比較例之表面層、中間層、 黏者層的原材料及賊量亦與評估結果—起示於表i。 [實施例2〜4、比較例1〜3] 、 外除愈了之黯組纽變為表1記奴樹餘成以 祕獲得表。將㈣之薄膜的 100103882 13 201136762 【14】 比較例3 1 1 1 g ° 0.28 〇 〇 Ο ο α 寸 卜d以 比較例2 1 1 1 § 1 0.05 Ο ο ο ο νο 寸 7 未剝離 0 10 比較例1 1 1 〇 1 1 0.25 ο ο ο ο 寸 ν〇 18 未剝離 0 20 實施例4 〇 1 〇 1 1 1 1 «Η 0.47 ο ο Ο Ο ν〇 寸 Ξ 2 - S 實施例3 §1111 0.81 ο ο Ο ο (Ν 〇〇 實施例2 § 1 1 1 1 0.81 ο ο Ο ο 寸 ν〇 二2以 實施例1 § 1 1 1 1 0.81 ο ο ο ο Ό -Ξ ° - 樹脂組成 表面層 b-ΡΡ-Ι (重量 ％) b-PP-2 (重量 ％) b-PP-3 (重量 ％) h-PP (重量％) LDPE (重量 ％) 表面粗度 Ra (从 m) Φ4 ηβη -Β- 黏著層 PEBR (重量％) SIBS (重量％) 黏著力 （N/50mm) 回捲力 （N/50mm) FE 數 （個/m2) 霧值 （％)The method. From the viewpoint of productivity, a method of recovering the molecular weight or composition of the (IV) (IV) alkene is preferred. In order to achieve a preferable surface roughness, a block copolymer of propylene and ethylene (hereinafter referred to as "propylene" is used. (10) Block copolymer ") Method as an example of a propylene-based polymer (H). C) is preferably 3 to 2 Gg/iQ minutes. The ultimate viscosity ([r/]) of the rubber component in the propylene/ethylene block copolymer of 4 to 15 g/1 G minutes is preferably 2.0 dl/g or more. In the propylene-based polymer used as the surface layer (A), an antistatic agent, a release agent, and an antistatic agent may be added to the surface protective film of the present invention to exhibit antistatic property or weather resistance, enhance profitability, or enhance appearance. A pure additive such as an antioxidant, a granule, a crystal nucleating agent, or the like, or a crystalline polyglycol which is added to a polyethylene or a polybutene, or a resin modifier such as a poly [poly] or an elastomer. When it is necessary to add an additive or a modifier to the above propylene-based polymer, for example, after adding the addition solution, the material or the double reduction machine or the feed control machine (fee-nuie (10) is kneaded, and then added as In the form of a film, 100103882 7 201136762 can be directly placed in a τ-shaped molding machine having an extruder to form a surface layer (Α) of the surface protective film of the present invention. As an adhesive layer (X) of the surface protective film of the present invention, As long as it is a known adhesive used as an adhesive layer for surface protection of the enamel, it can be used, and the damage of the adherend caused by the # eye or the transfer of the adhesive to the adherend (ie, the residual glue) is considered. Preferably, an olefin-based elastomer and/or a styrene-based elastomer is used. More preferably, it is a thin-smoke-type elastomer or a composition composed of a hydrocarbon-based elastomer and a styrene-based elastomer. The hydrocarbon elastomer, preferably DSC, is measured at a temperature rise and a cooling rate of 1 曰〇 ° C / min (4). The melting point is in the range of 〇 〇叱 2 〇叱 # # # # # # # # 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶 非晶To the observation in the range of G~2G (rc) The microcrystalline elastic body in which the heat of the peak of the peak is 1 μJ/g or less is more preferably a microcrystalline elastomer in which the heat of fusion of the amorphous elastomer or the melting point is 7 J/g or less. The olefin-based elastomer is an α-thin polymer or a copolymer having a carbon number of 2 to 2 Å, or a copolymer of ethylene and I and Lin or Qian and New Zealand. Specifically, ethylene propylene is exemplified. Copolymer, ethylene Μ 埽 埽 埽 copolymer, ethylene 丨 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , propylene, ethylene, L butene copolymer, i. butadiene homopolymer, 1-butene/ethylene copolymer, butene/propylene copolymer, 4_mercapto- ι homopolymer, 4_ Methyl (10)" propylene copolymer, cardamosole 100103882 8 201136762 ene-1 · 1-butene copolymer, 4-methylpentene-1 · propylene · 1-butene copolymer, propylene · 1- Butene copolymer, ethylene/vinyl acetate copolymer, ethylene/mercaptoacrylic acid copolymer, ethylene•曱A phthalic acid acrylate copolymer or the like. From the viewpoint of stability of adhesion over time, a propylene homopolymer, a propylene/ethylene copolymer, a propylene·1-butene copolymer, propylene·ethylene·1- A styrene-based elastomer. A known styrene-based elastomer having a polystyrene phase as a hard segment can be used. Specific examples thereof include a styrene-butadiene copolymer (SBR). Styrene • Isoprene • Styrene Copolymer (SIS), Styrene • Butadiene • Styrene Copolymer (SBS), and these hydrides (SEBS, SEPS, etc.), styrene • isobutylene • benzene Ethylene triblock copolymer (SIBS), styrene • isobutylene diblock copolymer (SIB). From the viewpoint of adhesion to the adherend and the transferability, a styrene-isobutylene-styrene triblock copolymer (SIBS) or a styrene-isobutylene diblock copolymer (SIB) is preferable. . The adhesive layer (X) of the surface protective film of the present invention can be formed by separately or blending the above olefin-based elastomer and/or styrene-based elastomer with the constituent components which are different from each other. Further, in the present invention, in order to control the adhesion, polyolefins such as polyethylene or polypropylene, acid-modified polyolefins, polyesters, polyamides, and the like may be further contained within a range not impairing the effects of the present invention. The resin modifier, or various additives such as an antistatic agent, a crystal nucleating agent, and an antioxidant. The olefin-based elastomer and/or the styrene-based elastomer are used in the case of forming the adhesive layer (X) of the surface protective film of the invention of 100103882 9 201136762, which is composed of a thin-smoke elastomer 〇 80% by weight and benzene, The elastomer 2 () is preferably composed of % by weight, more preferably a dilute hydrocarbon elastomer 〇 75% by weight, and a styrene elastomer Μ 刚 刚 刚 ' 再 再 再 妇 妇 妇 妇 妇 妇 妇 妇～75 wt% and styrene-based elastomer 25 to 95% by weight (when the adhesive layer contains other components as needed, in order to explain the ratio between the hydrocarbon-based elastomer and the styrene-based elastomer, only The total of these is regarded as 100% by weight. The adhesive layer (8) of the surface protective film of the present invention can be formed by using the above-mentioned (4) elastomer and/or vinyl (tetra) oxime alone or by blending the respective constituent components. Further, in the adhesive layer (8), in the purpose of controlling the adhesion, polyfluorene, acid-modified polyolefin, polyacetate, polyfluorene, such as polyethylene or polypropylene, may be contained within a range not impairing the effects of the present invention. A resin modifier such as an amine, or various additives such as an antistatic agent, a crystal nucleating agent, and an antioxidant. The above-mentioned adhesive layer composed of an olefin-based elastomer and/or a styrene-based elastomer and, if necessary, a resin modifier or an additive, can be used as a cost by laminating the surface layer (Α). The invention discloses a surface protection film. The adhesion of the surface protection film of the present invention to the acrylic sheet is an index of the transferability and the adhesion to the body, preferably (4) on the surface of the surface, more preferably in the range of 3 to 4 mm, and then more preferably in the range of 3 to 4 mm. Better for 5~face/5〇 earned around. By making the adhesion into such a range, good roll-out property can be maintained and adhesion to various adherends can be exhibited. — If the right-hander's power is less than 1Ν/50ππη, there is a case where the adhesion to the adherend is insufficient. If it exceeds 100103882 10 201136762 40N/5〇mm, the rewinding property is worse. The revolving force of the table (4) is the index of the peeling force when the roll is thin, and is the index of the roll-out property. In order to have the roll-out property, the rewinding force is preferably 2.5 N/5 Gmm or less. , better for (10) 丨 ~ 2 hidden. The range of the axis. The method of laminating the surface layer (4) and the adhesive layer is not particularly limited, and may be carried out by a known lamination method such as extrusion lamination or extrusion coating on a surface layer film obtained by T-die molding or inflation molding in advance. The method of adhering the layer or the film forming the surface layer and the adhesive layer are separately formed into a film, and the method of laminating the thin layer of the dry layered shirt is used, and from the viewpoint of production efficiency, δ ' is preferably a table (4), A method in which the components of the adhesive layer are supplied to a plurality of layers for coextrusion molding. In the present invention, an intermediate layer of at least j layers may be provided between the surface layer (8) and the adhesive layer (X). The intermediate layer is not particularly limited, and a crystalline polyolefin such as polypropylene or polyethylene having a sleek point of 100 or more, or a polystyrene, a polyamide or a polyolefin elastomer can be used. When the intermediate layer is used as the adhesive layer, a modified polyolefin or a polyolefin elastomer, a stupid vinyl elastomer, or a poly-Sa elastomer can be used. Among these, from the viewpoint of productivity and transparency, it is preferred to use polypropylene or a polyolefin elastomer as an intermediate layer. Further, when the adhesion to the surface layer (8) and the adhesive layer (X) is insufficient, the intermediate layer may be formed of an adhesive or a film for bonding the surface layer (A) and the adhesive layer (X). Floor. The thickness of the surface layer (A) of the surface protective film of the present invention is usually 100103882 11 201136762 0.05 〜 2_m ', preferably 〇 5 to m, more preferably, still more preferably 1 to 15/m1. The thickness of the adhesive layer (X) is usually 0.05 to 50 μm, preferably 0·3 to 40 Mm, more preferably 〇 5 to 3 〇) Um. Therefore, the thickness of the surface protective film of the present invention, including the intermediate layer provided as needed, is usually preferably 〇 5 to 4 〇〇 (four) or more preferably 3 to 300 μm. The transparency of the surface protective film of the present invention is preferably in the range of 2 Å to 9 〇%, measured in terms of ISK71Q5 at 50 μm, and particularly preferably in the range of 3 Å to 85%. Further, the number of fish eyes (FE number) of the surface protective film of the present invention is preferably 20 or less, more preferably 10 or less, or 5 or less, and more preferably 3 or less. [Examples] Hereinafter, the present invention will be described in detail by means of a Beiga example, but the present invention is not limited to the examples. [Evaluation method] Surface roughness (Ra): The surface protective film of the present invention (adjusted to a total thickness of 50 μm (/xm) in the present embodiment) at a temperature of 233⁄4±2〇C and a humidity of 50% of soil 10%. Next, curing was performed for 24 hours, and 5 mm square was cut out as a film sample. The film sample was measured using a non-contact surface roughness meter (Model: NT-2000 SYSTEM, manufactured by Veeco Co., Ltd.). Adhesion: The temperature is 23 °C ± 2t: humidity 5 〇. Under the condition of 1〇%, the acrylic sheet is cut to a width of 50mm and a length of i25mm, and the film sample is placed on the upper 100103882 12 201136762. The surface of the acrylic sheet is pressed by the weight of the rubber roller of 2kg. The entirety of the sample film is attached to the acrylic sheet. Next, the peeling force at a speed of 300 mm/min (180 degree peeling) was measured, and the peeling force per 5 mm width was used as the adhesive force (N/50 mm). Rewinding force: The peeling force (N/50 mm) at the time of stripping from the Koukang at a speed of 300 mm/min was measured using a parent sample as a rewinding force. Fisheye (FE): An off-line foreign matter inspection apparatus manufactured by Ayaha Engineering was used, and FE of an O.lmm or larger size was counted as the number of FEs per unit area (pieces/m2). Fog value: The surface protective film of the present invention (in the present embodiment, the total thickness was 50 μm) was measured based on JIS K7105. [Example 1] Three types of three layers of a single-axis extruder having a surface layer and an adhesive layer of 3 mm mm 0 and a die width of 5 mm in a middle layer of a 4 mm mm single-axis extruder The τ-shaped molding machine supplies the raw materials separately, and obtains the overall (4) film of the present invention which is composed of the thickness of the surface layer, the thickness of the adhesive layer, and the thickness of the intermediate layer. The evaluation results of the table of _ _ _ _ Further, the raw materials and the amount of the thieves constituting the surface layer, the intermediate layer, and the adhesive layer of the examples and the comparative examples were also shown in Table i. [Examples 2 to 4, Comparative Examples 1 to 3] The 黯 黯 纽 变为 变为 变为 变为 外 外 外 外 外 黯 黯 黯 黯 。 。 。 。 。 。 。 。 。 。 。 。 The film of (4) is 100103882 13 201136762 [14] Comparative Example 3 1 1 1 g ° 0.28 〇〇Ο ο α 寸 卜 d to Comparative Example 2 1 1 1 § 1 0.05 Ο ο ο ο νο 寸 7 Unpeeled 0 10 Compare Example 1 1 1 〇 1 1 0.25 ο ο ο ο 〇 〇 〇 18 未 剥离 20 20 20 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 ο ο Ο ο (Ν 〇〇 Example 2 § 1 1 1 1 0.81 ο ο Ο ο 〇 〇 〇 2 2 to Example 1 § 1 1 1 1 0.81 ο ο ο ο Ό -Ξ ° - Resin composition surface layer b -ΡΡ-Ι (% by weight) b-PP-2 (% by weight) b-PP-3 (% by weight) h-PP (% by weight) LDPE (% by weight) Surface roughness Ra (from m) Φ4 ηβη -Β - Adhesive layer PEBR (% by weight) SIBS (% by weight) Adhesion (N/50mm) Rewinding force (N/50mm) FE number (pieces/m2) Fog value (%)
S8S100I 201136762 h-PP ： 均聚丙烯（熔點= 160°C，MFR=7g/10 分鐘，Prime Polymer . 公司製） . b-PP-1 ： 丙烯•乙烯嵌段共聚合體（商品名：PC684A，熔點 = 160°C，MFR=6g/10 分鐘，SunAllomer 公司製） b-PP-2 ： 丙烯•乙烯嵌段共聚合體（商品名：BC3HF，熔點= 160°C， MFR=8.5g/10 分鐘，Japan Polypropylene 公司製） b-PP-3 ： 7- 丙烯•乙烯嵌段共聚合體(熔點= 160t：，MFR=3g/l〇分鐘) LDPE ： 低密度聚乙烯（高壓法低密度聚乙烯，密度=〇.9i7g/cm3， MFR=3g/10 分鐘） PEBR ： 丙烯•乙烯· 1·丁烯共聚合體(於〇〜200°c觀測到熔解熱 量4J/g之熔點波峰，MFR=7g/10分鐘） SIBS ： 苯乙烯•異丁烯共聚合體（苯乙烯.異丁烯•笨乙烯三嵌 鲁 段共聚合體’ Mw=65,000，JIS-A硬度=33，商品名 SIBSTAR072T(kaneka 公司製）） 實施例1〜4中，黏著力為7〜18 N/50mm，可確保充分的 100103882 15 201136762 黏著性。又，回捲力為〇 6 N/5〇mm，可知具有優異的 轉出性。此係因為具有充分的黏著力，且表面粗度(Ra)為 0.47〜0.81μιη之適當粗度。 此外’實施例1〜4中’霧值為6〇〜70%，可知作為要求霧 值80%以下的透明性之情況的表面保護賴，係具有優異之 透明性。 另一方面，比較例1、2中，黏著力為7〜18 N/50mm，雖 確保了充分的黏著性’但回捲力在比較例丄、2中係為不剝 離之程度，可知轉出性極差4仙為比較例丨、2中之表 面粗度(Ra)分別為〇 25μιη、0.〇5μιη，係極小，因此難以剝 離。 關於比較例3，表面粗度(Ra)係為〇 28卿，具有充分的黏 著力’回捲力亦為0 5 N/5〇mm，亦即轉出性良好。然而， 在表面層為由h_PP及LDPE之組成物所構成之情況（比較例 3)，魚眼數(FE數）多，不適合作為表面保護薄膜。 如此，由實施例丨〜4及比較例3可知，表面層由丙烯系聚 合體構成係為必要條件。 (產業上之可利用性） 毛月之表面保護薄膜的黏著特性、透明性、回捲性及耐 二‘異作為光學用途、建材用途、汽車零件用途的保護 ㈣之產業上利用價值極高。 100103882S8S100I 201136762 h-PP : homopolypropylene (melting point = 160 ° C, MFR = 7 g/10 min, manufactured by Prime Polymer Co., Ltd.) b-PP-1 : propylene/ethylene block copolymer (trade name: PC684A, melting point = 160 ° C, MFR = 6 g / 10 min, manufactured by Sun Allomer Co., Ltd.) b-PP-2 : propylene and ethylene block copolymer (trade name: BC3HF, melting point = 160 ° C, MFR = 8.5 g/10 min, Japan Polypropylene company) b-PP-3 : 7- Propylene and ethylene block copolymer (melting point = 160t:, MFR = 3g / l〇 minutes) LDPE : Low density polyethylene (high pressure low density polyethylene, density = 〇 .9i7g/cm3, MFR=3g/10 min) PEBR : propylene·ethylene·1·butene copolymer (melting peak of melting heat 4J/g observed at 〇~200°c, MFR=7g/10min) SIBS : styrene-isobutylene copolymer (styrene, isobutylene, stupid ethylene, triple-embedded copolymer, 'Mw=65,000, JIS-A hardness=33, trade name: SIBSTAR072T (manufactured by Kaneka Co., Ltd.)) In Examples 1 to 4, adhesion The force is 7~18 N/50mm, which ensures sufficient adhesion of 100103882 15 201136762. Further, the rewinding force was 〇 6 N/5 〇 mm, and it was found that the retractability was excellent. This is because the film has sufficient adhesion and the surface roughness (Ra) is an appropriate thickness of 0.47 to 0.81 μm. Further, in the first to fourth embodiments, the haze value is from 6 Å to 70%, and it is understood that the surface protection of the case where the transparency of the fog value is 80% or less is required to have excellent transparency. On the other hand, in Comparative Examples 1 and 2, the adhesion was 7 to 18 N/50 mm, and sufficient adhesion was ensured, but the rewinding force was not peeled off in Comparative Examples 2 and 2, and it was found that the rewinding was performed. The extremely poor 4 sen is the comparative example, and the surface roughness (Ra) of 2 is 〇25 μmη and 0.〇5 μιη, respectively, and is extremely small, so that it is difficult to peel off. With respect to Comparative Example 3, the surface roughness (Ra) was 〇28 qing, which had sufficient adhesion, and the rewinding force was also 0 5 N/5 〇 mm, that is, the turn-out property was good. However, in the case where the surface layer is composed of a composition of h_PP and LDPE (Comparative Example 3), the number of fish eyes (FE number) is large, and it is not suitable as a surface protective film. As described above, in Examples 丨 to 4 and Comparative Example 3, it is understood that the surface layer is composed of a propylene-based polymer. (Industrial Applicability) The adhesion properties, transparency, rewindability, and resistance of the surface protection film of Maoyue are extremely high in the industrial use of optical applications, building materials, and automotive parts. 100103882