201233757 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種表面保護膜。更詳細而言，本發明係 關於一種用以保護金屬鏡面板、玻璃板、ITO(Indium Tin Oxide ’氧化銦錫）膜等光學膜等之表面之表面保護膜。 【先前技術】 為保護各種被接著體之表面，而廣泛地使用包含基材層 與黏著劑層之積層體之表面保護膜。 通常’金屬鏡面板、玻璃板、ITO膜等光學膜等要求於 表面不產生損傷，並且要求於貼附有表面保護膜之情形時 不污染表面。另一方面，因於被接著體上貼附表面保護膜 時需要良好之貼合性，故對於表面保護膜要求適度之柔軟 性。 報告有為賦予表面保護膜柔軟性，而使用含有藉由交又 分級法所得之〇。〇以上2(rc以下之樹脂溶出量為總樹脂量 的20〜5 0重量％之聚烯烴系樹脂的基材之表面保護黏著片 材（參照專利文獻1)。 但是’專利文獻1中報告之表面保護黏著片材係以防止 頸縮、提高拉拔加工性、防止對被接著體表面之損傷為目 的，目的不在於在貼附表面保護膜之情形時抑制被接著體 表面之污染性。因此，於使用專利文獻丨中報告之表面保 護黏著片材之情形時，存在污染被接著體表面之問題。 先前技術文獻 專利文獻 158745.doc 201233757 專利文獻1:日本專利第3401087號公報 【發明内容】 發明所欲解決之問題 本發明係為解決上述先前之問題而實施者，其目的在於 提供一種可防止對被接著體表面之損傷，藉由具有優異之 柔軟性而貼合性或密接性良好，且亦可抑制被接著體表面 之污染性的新穎表面保護膜。 解決問題之技術手段 本發明之表面保護膜於含有藉由交叉分級法所得之〇它 以上而未達2(TC時之樹脂溶出量為總樹脂量的i重量％以 上而未達20重量％之聚烯烴系樹脂的基材層之單面具有黏 著劑層。 於較佳實施方式中，上述聚烯烴系樹脂藉由交又分級法 所得之2(TC以上而未達75<t時之樹脂溶出量為總樹脂量的 5重量％以上而未達40重量％，藉由交叉分級法所得之75艺 以上而未達1251時之樹脂溶出量為總樹脂量的3〇重量％ 以上而未達90重量〇/〇。 於較佳實施方式中，上述聚烯烴系樹脂之重量平均分子 量於100000〜450000之範圍内。 於較佳實施方式中，上述基材層之拉伸彈性模數為 150-840 N/m2 ° 發明之效果 根據本發明’可提供一種可防止對被接著體表面之損 傷’藉由具有優異之柔軟性而貼合性或密接性良好，且亦 158745.doc 201233757 - 可抑制被接著體表面之污染性的新颖表面保護膜。 【實施方式】 《《A.表面保護膜》》 本發明之表面保護膜於基材層之單面具有黏著劑層。 _，本發明之表面保護膜係具有基材層/黏著劑層之積層 * 結構之積層體。 基材層可僅為1層，亦可為2層以上之積層體。黏著劑層 可僅為1層，亦可為2層以上之積層體。 本發明之表面保護膜只要為具有基材層/黏著劑層之積 層、·=構之積層體，則可在無損本發明之效果之範圍内包含 任意之適當之其他層。 圖1係本發明之較佳實施方式之表面保護膜之概略剖面 圖。表面保護膜10包含基材層12與黏著劑層14。圖1所示 之表面保濩膜於保存時，較佳為以基材層12成為外側之方 式捲成圓筒狀。 本發明之表面保護膜之厚度可根據用途設定為任意之適 田厚度。較佳為10卩111〜50。μιη，更佳為1〇 μιη〜3〇〇 ， 進而較佳為1〇 μιη〜200 μηι。 - 《Α·1.基材層》 - 基材層之厚度可根據用途採用任意之適當厚度。基材層 之厚度較佳為1〇 μιη〜3〇〇 μηι，更佳為15 μιη〜200 μπι，進 而較佳為20 Pm〜150 μιη，特佳為25 μιη〜100 μιη。 基材層可僅為1層，亦可為2層以上之積層體❶於基材 層為2層以上之積層體之情形時，較佳為2〜5層，更佳為 158745.doc 201233757 2〜3層。於基材層為僅1層之情 1月$時’表面保護膜之製造會 變得容易。於基材層為2層以上之接 上之積層體之情形時，可利 用各層劃分功能。再者，於基好思6 丞材層包含複數層之情形時， 因可能存在該等各層之界面不明確之情形，故亦存在形成 基材層後，無法明確地分離構成該基材層之各層之情形。 基材層含有㈣烴㈣脂。基材層中之聚稀烴系樹脂之 含有比例較佳為50重量％以上，更佳為7〇〜1〇〇重量％，進 而較佳為90〜HH)重量％ ’特佳為95〜刚重量％，最佳為實 質上為100重量％。 本發明中之聚烯烴系樹脂之重量平均分子量較佳為於 100000〜450000之範圍内，更佳為於15〇〇〇〇〜4〇〇〇〇〇之範圍 内，進而較佳為於200000〜400000之範圍内。於本發明中 之聚烯烴系樹脂之重量平均分子量未達1〇〇〇〇〇之情形時， 有所得之表面保護膜之延展性或強度不充分之虞。於本發 明中之聚烯烴系樹脂之重量平均分子量超過45〇〇〇〇之情形 時，有成形性變差之虞。 本發明中之聚烯烴系樹脂藉由交又分級法所得之以 上而未達20°c時之樹脂溶出量為總樹脂量的1重量％以上 而未達20重量％’較佳為5重量％以上而未達is重量％，更 佳為10重量％以上而未達18重量％。於本發明中之聚烤煙 系樹脂藉由交叉分級法所得之〇°C以上而未達2〇。(：時之樹 脂溶出量未達總樹脂量的1重量％之情形時，有所得之表 面保護膜無法表現出充分之柔軟性之虞。本發明中之聚稀 烴系樹脂藉由交叉分級法所得之0°C以上而未達20。(：時之 158745.doc 201233757 樹月曰/谷出量為總樹脂量的20重量％以上之情形，有於將所 得之表面保護膜貼附於被接著體之情形時污染被接著體表 面之虞。作為該污染之原因，例如於本發明中之聚烯烴系 樹脂藉由交又分級法所得之〇°C以上而未達2(TC時之樹脂 /合出量為總樹脂量的2〇重量0/〇以上之情形時，可舉出過量 地a有可成為污染物質之低分子量體之可能性。 本發明之聚烯烴系樹脂藉由交又分級法所得之2〇〇c以上 而未達751時之樹脂溶出量較佳為總樹脂量的5重量％以 上而未達40重量％，更佳為1〇重量％以上而未達3〇重量 %，進而較佳為10重量％以上而未達25重量％。本發明中 之聚烯烴系樹脂藉由交叉分級法所得之2(rc以上而未達 75 C時之樹脂溶出量未達總樹脂量的5重量％之情形時， 有所得之表面保護膜無法表現出充分之柔軟性之虞。本發 明中之聚烯烴系樹脂藉由交又分級法所得之2〇。匸以上而未 達75 C時之樹脂溶出量為總樹脂量的4〇重量％以上之情形 時，有所得之表面保護膜之強度變得不充分之虞。 本發明之聚烯烴系樹脂藉由交又分級法所得之75t以上 而未達125°C時之樹脂溶出量較佳為總樹脂量的3〇重量％ 以上而未達90重量％，更佳為35重量％以上而未達85重量 /ό。本發明中之聚浠煙系樹脂藉由交叉分級法所得之艺 以上而未達125 C時之樹脂溶出量未達總樹脂量的3〇重量 %之情形時，有於將所得之表面保護膜貼附於被接著體之 情形時會污染被接著體表面之虞。本發明中之聚烯烴系樹 脂藉由交叉分級法所得之75。(：以上而未達i25r時之樹脂 158745.doc 201233757 溶出量為總樹脂量的90重量。/。以上之情形時，有所得之表 面保護膜無法表現出充分之柔軟性之虞。 作為本發明t之聚稀烴系樹月旨，只|為藉由交又分級法 所：之以上而未達20t時之樹脂溶出量為總樹脂量μ 重置％以上而未達20重量％之聚稀烴系樹脂，貝^可自任意 適當之聚埽烴系樹脂之中選擇使用。作為此類㈣煙系樹 脂，更佳為進而自藉由交又分級法所得之2〇t以上而未達 75°C時之樹脂溶出量為總樹脂量的5重量％以上而未達利 重量％之聚稀煙系樹脂中選擇使用。X，作為此類聚烯烴 系樹脂’進而較佳為進而自藉由交叉分級法所得之抑以 上而未達125t時之樹脂溶出量為總樹脂量的％重量％以 上而未達90重量％之聚烯烴系樹脂中選擇使用。 作為此類聚稀烴系樹脂，例如可列舉㈣烴之均聚物、 兩種以上之α_烯烴之共聚物、嵌段聚丙稀、無規聚丙稀、 -種或兩種以上之。_烯烴與其他乙烯系單體之共聚物、該 等聚合物之改性物、聚合物合金、EPR(ethylene propylene ’心乙烯丙稀橡膠）系橡膠或丙稀系橡膠等聚稀烴系橡 膠等。作為共聚物之形態，例如可列舉嵌段形態或無規形 態。 作為cx-稀烴，較佳為碳原子數2〜12〇•稀煙。作為此類 &稀烴，例如可列舉乙烯、丙歸、卜丁稀、4-甲基小戊稀 等。 作為a—稀烴之均聚物’例如可列舉聚乙_、均聚丙 稀（ΡΡ)、聚（1-丁烯）、聚（4_甲基戍）等。 158745.doc 201233757 作為聚乙烯（PE)，例如可列舉低密度聚乙烯（LDpE)、直 鏈狀低密度聚乙烯（LLDPE)、中密度聚乙烯、高密度聚乙 烯（HDPE)等。 均聚丙烯之結構可為等規、非規、間規之任一結構。 作為兩種以上之α_烯烴之共聚物，例如可列舉乙烯/丙烯 共聚物、乙烯/1-丁烯共聚物、乙烯/丙烯丁烯共聚物、 乙烯/碳原子數5〜12之a-烯烴共聚物、丙烯/碳原子數5〜12 之α-烯烴共聚物等。 作為一種或兩種以上之^烯烴與其他乙烯系單體之共聚 物，例如可列舉乙烯/乙酸乙烯酯共聚物、乙烯/丙烯酸烷 基酯共聚物、乙烯/甲基丙烯酸烷基酯共聚物、乙烯-非共 軛二烯共聚物等。 於基材層中，聚烯烴系樹脂可僅含有丨種，亦可含有2種201233757 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a surface protective film. More specifically, the present invention relates to a surface protective film for protecting the surface of an optical film such as a metal mirror panel, a glass plate, or an ITO (Indium Tin Oxide) film. [Prior Art] In order to protect the surfaces of various adherends, a surface protective film comprising a laminate of a substrate layer and an adhesive layer is widely used. Generally, an optical film such as a metal mirror panel, a glass plate, or an ITO film is required to have no damage on the surface, and it is required to not contaminate the surface when a surface protective film is attached. On the other hand, since the surface protective film is attached to the adherend, good adhesion is required, so that the surface protective film is required to have moderate flexibility. The report has been made to impart softness to the surface protective film, and the use of the enamel obtained by the cross-grading method. In the surface protective protective sheet of the base material of the base material of the polyolefin resin of 20 to 50% by weight of the total resin amount (see Patent Document 1). The surface protective adhesive sheet is intended to prevent necking, improve drawing workability, and prevent damage to the surface of the adherend, and is not intended to suppress contamination of the surface of the adherend when the surface protective film is attached. In the case of using the surface protective adhesive sheet reported in the patent document, there is a problem of contaminating the surface of the adherend. PRIOR ART DOCUMENT Patent Document 158745.doc 201233757 Patent Document 1: Japanese Patent No. 3401087 DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a method for preventing damage to a surface of a member to be bonded, and having excellent flexibility and good adhesion or adhesion. Moreover, it is also possible to suppress a novel surface protective film which is contaminated by the surface of the adherend. Technical Solution to Problem The surface protective film of the present invention is The base material layer of the polyolefin-based resin obtained by the cross-fractionation method has a size of less than 2 (the amount of resin eluted at TC is i% by weight or more of the total resin amount and less than 20% by weight) In a preferred embodiment, the polyolefin-based resin obtained by the cross-fractionation method is 2 (TC or more and less than 75 < t, the resin elution amount is 5% by weight or more of the total resin amount; 40% by weight, the amount of resin eluted by the cross-classification method of 75 or more and less than 1251 is 3% by weight or more of the total resin amount and less than 90% by weight/〇. In a preferred embodiment, The weight average molecular weight of the polyolefin-based resin is in the range of 100,000 to 450,000. In a preferred embodiment, the tensile modulus of the substrate layer is 150-840 N/m 2 °. The effect of the invention is according to the present invention. Provided is a novel surface protective film which can prevent damage to the surface of the adherend, which has good adhesion and adhesion by excellent flexibility, and is also 158, 745. doc 201233757 - which can suppress the contamination of the surface of the adherend. [Embodiment] A. Surface Protective Film The surface protective film of the present invention has an adhesive layer on one side of the substrate layer. The surface protective film of the present invention has a laminate of a substrate layer/adhesive layer structure* structure. The base material layer may be only one layer, or may be a laminate of two or more layers. The adhesive layer may be only one layer or a laminate of two or more layers. The surface protection film of the present invention may have a substrate layer. The laminate of the adhesive layer and the laminated body of the adhesive layer may include any suitable other layer within the scope of the effects of the present invention. Fig. 1 is a schematic cross section of a surface protective film according to a preferred embodiment of the present invention. The surface protective film 10 includes a substrate layer 12 and an adhesive layer 14. When the surface protective film shown in Fig. 1 is stored, it is preferable to roll the surface of the base material layer 12 into a cylindrical shape. The thickness of the surface protective film of the present invention can be set to any appropriate field thickness depending on the use. It is preferably 10卩111~50. More preferably, it is 1 〇 μιη to 3 〇〇 , and further preferably 1 〇 μιη to 200 μηι. - "Α·1. Substrate layer" - The thickness of the substrate layer can be any appropriate thickness depending on the application. The thickness of the substrate layer is preferably from 1 μm to 3 μm, more preferably from 15 μm to 200 μm, even more preferably from 20 to 150 μm, particularly preferably from 25 to 100 μm. The base material layer may be only one layer, or may be a laminate of two or more layers. When the base layer is a laminate of two or more layers, it is preferably 2 to 5 layers, more preferably 158745.doc 201233757 2 ~ 3 layers. In the case where the base material layer is only one layer, the production of the surface protective film becomes easy in January. In the case where the base material layer is a laminate having two or more layers, the division function of each layer can be utilized. Furthermore, in the case where the base layer of the base layer contains a plurality of layers, there may be cases where the interfaces of the layers are unclear, and therefore, after the base layer is formed, the base layer cannot be clearly separated. The situation of each layer. The substrate layer contains (tetra) hydrocarbon (tetra) grease. The content ratio of the polyolefin resin in the base material layer is preferably 50% by weight or more, more preferably 7 Torr to 1% by weight, still more preferably 90 to HH by weight%, and particularly preferably 95 to just The weight % is preferably substantially 100% by weight. The weight average molecular weight of the polyolefin resin in the present invention is preferably in the range of from 100,000 to 450,000, more preferably in the range of from 15 to 4, and still more preferably in the range of from 200,000 to 10,000. Within the range of 400000. When the weight average molecular weight of the polyolefin-based resin in the present invention is less than 1 Å, the resulting surface protective film may have insufficient ductility or strength. When the weight average molecular weight of the polyolefin resin in the present invention exceeds 45 Å, the formability is deteriorated. In the polyolefin resin of the present invention, the resin eluted amount when the temperature is less than 20 ° C by the cross-fractionation method is 1% by weight or more and less than 20% by weight, preferably 5% by weight, based on the total resin amount. The above does not reach is% by weight, more preferably 10% by weight or more and less than 18% by weight. The poly-baked tobacco resin in the present invention is not more than 2 藉 by the cross-grading method. (When the amount of resin eluted is less than 1% by weight of the total amount of the resin, the obtained surface protective film cannot exhibit sufficient flexibility. The cross-fraction method of the poly-based resin in the present invention The obtained 0 ° C or more and less than 20. (: 158745.doc 201233757 The amount of saplings/gluten is 20% by weight or more of the total resin amount, and the obtained surface protective film is attached to the In the case of the body, the surface of the body is contaminated. For the reason of the contamination, for example, the polyolefin resin in the present invention is not more than 2 (the resin at the time of TC) obtained by the cross-fractionation method. When the amount of the mixture is 2 〇 or more of the total resin amount of 0 〇 or more, there is a possibility that the amount of the low-molecular substance which can become a pollutant is excessively large. The resin elution amount of 2 〇〇c or more and less than 751 obtained by the classification method is preferably 5% by weight or more of the total resin amount and less than 40% by weight, more preferably 1% by weight or more and less than 3 〇 by weight. %, further preferably 10% by weight or more and less than 25% by weight. In the present invention When the polyolefin resin is obtained by the cross-fraction method, 2 (rc or more and less than 75 C, the amount of resin eluted is less than 5% by weight of the total resin), the obtained surface protective film cannot exhibit sufficient In the case where the polyolefin resin in the present invention is obtained by the cross-linking method, the amount of the resin eluted when the resin is less than 75 C is 4% by weight or more of the total resin amount, The strength of the obtained surface protective film becomes insufficient. The polyolefin resin of the present invention is preferably 75 t or more and the resin elution amount at 125 ° C or less is preferably the total amount of the resin. 3〇% by weight or more and less than 90% by weight, more preferably 35% by weight or more and less than 85% by weight. The polyfluorene-based resin of the present invention is less than 125 C by the cross-grading method. When the amount of the resin eluted is less than 3% by weight of the total amount of the resin, the surface protective film obtained is attached to the adherend to contaminate the surface of the adherend. The olefin resin is obtained by cross-classification method of 75. (: When the resin is not up to i25r, 158745.doc 201233757 The amount of elution is 90% by weight of the total resin. In the above case, the obtained surface protective film cannot exhibit sufficient flexibility. The polyhydrocarbon system is only for the purpose of the above-mentioned method, and the amount of the resin eluted is less than 20 tons, and the amount of the resin is less than 20% by weight. The resin may be selected from any suitable polyhydrocarbene-based resin. As such a (four) flue-based resin, it is more preferably not more than 75 ° C obtained by the cross-grading method. When the amount of resin eluted is 5% by weight or more of the total resin amount and less than the weight % of the poly-smoke-based resin, it is selected and used. X, as such a polyolefin-based resin, further preferably, the amount of resin eluted when the amount is less than 125 t from the cross-fractionation method is less than or equal to 90% by weight of the total resin amount It is selected for use as an olefin resin. Examples of such a polyolefin-based resin include a (tetra) hydrocarbon homopolymer, a copolymer of two or more kinds of α-olefins, a block polypropylene, a random polypropylene, a seed, or a mixture of two or more. Copolymer of olefin and other vinyl monomer, modified product of the polymer, polymer alloy, EPR (ethylene propylene 'ethylene propylene rubber) rubber or polythene rubber such as propylene rubber . The form of the copolymer may, for example, be a block form or a random form. As the cx-dilute hydrocarbon, it is preferably a carbon atom number of 2 to 12 〇 • a dilute smoke. Examples of such &thratic hydrocarbons include ethylene, propylene, butadiene, 4-methylpentanthene, and the like. Examples of the homopolymer of a-thin hydrocarbon include poly-b-, homo-propylene (poly), poly(1-butene), and poly(4-methylhydrazine). 158745.doc 201233757 Examples of the polyethylene (PE) include low density polyethylene (LDpE), linear low density polyethylene (LLDPE), medium density polyethylene, and high density polyethylene (HDPE). The structure of the homopolypropylene can be any structure of isotactic, irregular, and syndiotactic. Examples of the copolymer of two or more α-olefins include an ethylene/propylene copolymer, an ethylene/1-butene copolymer, an ethylene/propylene butene copolymer, and an a-olefin having an ethylene/carbon number of 5 to 12. A copolymer, an propylene/α-olefin copolymer having 5 to 12 carbon atoms, and the like. Examples of the copolymer of one or two or more olefins and other vinyl monomers include an ethylene/vinyl acetate copolymer, an ethylene/alkyl acrylate copolymer, and an ethylene/alkyl methacrylate copolymer. An ethylene-nonconjugated diene copolymer or the like. In the base material layer, the polyolefin resin may contain only lanthanum or two kinds.
以上。作為含有2種以上之形態，可列舉混合或共聚人 等。 D 聚烯烴系樹脂可使用市售品。 基材層之拉伸彈性模數較佳為15〇〜84〇 N/mm2，更佳為 200〜800 N/mm2。基材層之拉伸彈性模數未達15〇 N/mm2之 情形時，有基材層之操作變得困難，貼合性降低，或剝離 操作變得困難之虞。基材層之拉伸彈性模數超出84〇 N/mm2之情形時，有基材層之柔軟性變得不充分之虞。 於基材層中，在無損本發明之效果之範圍内，可含有任 意適當之其他樹脂。 於基材層中，根據需要可含有任意適當之添加劑。作為 158745.doc -9- 201233757 基材層中可含有之添加劑，例如可列舉紫外線吸收劑、耐 熱穩定化劑、填充劑、潤滑劑、著色劑（染料等）、抗氧化 劑、抗眼脂劑、抗黏連劑、發泡劑、聚乙烯亞胺等。基材 層中含有之添加劑之種類、數及量可根據目的適當地設 定。 作為上述紫外線吸收劑’例如可列舉苯并三唑系化合 物、二苯甲酮系化合物、苯甲酸酯系化合物等。上述紫外 線吸收劑之含量，只要積層膜之成形時無滲出，則可採用 任意適當之含量。代表性的是相對於基材層中之聚烯烴系 樹脂1 00重量份，較佳為0 01重量份〜5重量份。 作為上述耐熱穩定化劑，例如可列舉受阻胺系化合物、 磷系化合物及氰基丙烯酸酯系化合物等。上述耐熱穩定化 劑之含量，只要積層膜之成形時無渗出，則可採用任意之 適當之含量。代表性的的是相對於基材層中之聚烯烴系樹 脂100重量份，較佳為0.01重量份〜5重量份。 作為上述填充劑，例如可列舉滑石、氧化鈦、氧化鈣、 氧化鎂、氧化鋅、碳酸鈣、矽土、黏土、雲母、硫酸鋇、 晶鬚、氫氧化鎂等無機填充劑。填充劑之平均粒徑較佳為 0·1 μιη〜10 μιηβ填充劑之含量相對於基材層中之聚烯烴系 樹脂100重量份，較佳為！重量份〜200重量份。 、 於基材層包含複數層之情形時，該基材層中可含有任意 適當之其他層。作為此類其他層，例如可列舉表面層（亦 稱剝離層）。表面層可包含於基材層中設有黏著劑層之= 之相反側之表面側。 158745.doc -10· 201233757 於基材層中含有表面層之情形時，例如將本發明之表面 保遵膜以捲筒形m存之情形時等，該表面層與黏著劑層 積層。因&’要求表面層與黏著劑層之剝離性良好，較佳 為表面層含有剝離劑。絲面層含有剝離劑，則可防止例 如於將本發明之表面保護膜以捲筒形態保存等表面保護膜 彼此重疊之狀態下表面層與黏著劑層之黏貼。&，無需用 隔離膜層覆蓋表面層。 藉由塗佈形成表面層之情形時’作為剝離劑，例如可採 用長鍵院基系剝離劑、含氟長鏈院基系剝離劑、聚石夕氧系 剝離劑等。作為㈣氧__，可列舉加成反應型熱硬 化型、縮合反應型熱硬化型、利用紫外線或電子束等之放 射線硬化型等。 藉由共擠_成表面層之情料，表面層之厚度較佳為 2 μιη 10 μιη，進而較佳為2 μιη〜8卿，特佳為2叫〜$㈣。 表面層之厚度較2㈣薄之情形時，有無法充分地表現作為 表面層之功能之虞。表面層之厚度較1〇 μιη厚之情形時， 有表面層之機械物性影響表面保護膜整體之機械物性，表 面保護膜之操作變差之虞。 為表面層之主要形成材料，可採用任意適當之熱塑性 樹脂。作為表面層之主要形成材料，例如可採用以聚乙 烯、聚丙婦、TPO(The_plastie p〇lyGlefin •稀烴之改性物、α•烯烴與乙酸乙_或甲基丙= S曰等各種乙烯基化合物之共聚物、聚醯胺、聚酯 '聚碳酸 0曰、聚胺基甲酸酯、聚氣乙烯等為主要成分之熱塑性樹 158745.doc 201233757 脂°該等材料可僅為1種，亦可為2種以上。 作為剝離劑’較佳為採用長鏈烷基系剝離劑。 長鍵垸基系剝離劑含有長鏈烷基系高分子。長鏈烷基系 南分子於任意適當之加熱溶劑中，可使含有反應性基之高 分子與含有可與該反應性基反應之烷基之化合物發生反 應。當發生該反應時’根據需要可使用觸媒。作為觸媒， 例如可列舉錫化合物或三級胺等。 作為上述反應性基’例如可列舉羥基、胺基、羧基、馬 來酸酐基等。作為含有該反應性基之高分子，可列舉乙 烯_乙烯醇共聚物、聚乙烯醇、聚乙烯亞胺、聚乙烯胺、 苯乙烯-馬來酸酐共聚物等。其中較佳為乙烯-乙烯醇共聚 物。再者，所謂乙烯-乙烯醇共聚物，其概念亦包含乙烯_ 乙酸乙烯酯共聚物之部分皂化物。所謂聚乙烯醇，其概念 亦亦包含聚乙酸乙烯酯之部分皂化物。 上述烷基之碳數較佳為8個〜3〇個，進而較佳為12個〜22 個。上述烷基之碳數若在此範圍内，可獲得具有優異剝離 性之表面層（C)。作為此類烷基之具體例，可列舉十二烷 基十八烷基、一十二烷基等。作為含有此類烷基之化合 物（即，含有可與上述反應性基反應之烷基之化合物），可 列舉異氰酸辛i旨、異氰酸癸g旨、異氰酸十二㈣自旨、異氛 酸十八燒基S旨等異氰酸s旨；冑氯、胺、料。其中較佳為 異氰酸酯。 長鏈烷基系高分子之重量平均分子量較佳為 10000〜1000000 ’進而較佳為2〇〇〇〇〜1〇〇〇〇〇〇。若長鏈烷基 158745.doc -12- 201233757 系南分子之重量平均分子量於此範圍内’可獲得具有優異 剝離性之表面層。 表面層中之長鏈烷基系剝離劑之含有比例較佳為丨重量 %〜50重量％，進而較佳為2重量％〜3〇重量％，特佳為5重量 /〇〜20重量％。含有比例少於【重量％之情形時，有無法得 • 到添加長鏈烷基系剝離劑之效果之虞。含有比例多於5〇重 量％之情形時’有產生滲出物之虞。 表面層根據需要可含有任意適當之添加劑。 《A-2.黏著劑層（B)》 作為黏著劑層中含有之黏著劑，在無損本發明之效果之 範圍内可採用任意適當之黏著劑。構成黏著劑層之黏著劑 可僅為1種’亦可為2種以上。 上述黏著劑層之厚度較佳為！ μιη〜3〇〇 μιη，進而較佳為 2 μιη〜1〇〇 μιη，特佳為3叫〜5〇叫。 作為構成上述黏著劑層之黏著劑，例如可列舉橡膠系黏 著劑、丙烯酸系黏著劑、聚矽氧系黏著劑等。 亦可使用熱塑性黏著劑作為上述黏著劑。作為構成熱塑 性黏著劑之材料，例如可列舉作為黏著劑材料之任意適當 - 之苯乙烯系嵌段共聚物、丙烯酸系熱塑性樹脂等。 • 作為上述苯乙烯系嵌段共聚物之具體例，可列舉苯乙 烯-乙烯-丁烯共聚物（SEB)等苯乙烯系ΑΒ型二嵌段共聚 物；苯乙烯-丁二烯_苯乙烯共聚物（SBS)、SBS之氫化物 (苯乙烯-乙烯-丁烯-苯乙烯共聚物（SEBS))、苯乙烯_異戊二 稀-苯乙締共聚物（SIS)、SIS之氫化物（苯乙烯_乙稀-丙稀· 158745.doc •13- 201233757 苯乙烯共聚物（SEPS))、苯乙烯-異丁烯-苯乙烯共聚物 (SIBS)等苯乙烯系ΑΒΑ型三嵌段共聚物；苯乙烯-丁二稀_ 苯乙烯·丁二烯（SBSB)等苯乙烯系ABAB型四嵌段共聚物； 苯乙烯-丁二烯-苯乙烯-丁二烯_苯乙烯（SBSBS)等苯乙稀系 ABABA型五嵌段共聚物；包含該等以上之AB重複單元之 苯乙烯系多嵌段共聚物；使苯乙烯-丁二烯橡膠（SBR)等苯 乙烯系無規共聚物之乙烯性雙鍵氫化之氫化物等。作為市 售品’例如可列舉Kraton Polymers公司製造之「G1657」 (苯乙烯系彈性體）等。上述共聚物可單獨使用，亦可併用2 種以上。 上述苯乙烯系嵌段共聚物中之苯乙烯嵌段結構之含有比 例較佳為5重量％〜40重量％，進而較佳為7重量％〜3 〇重量 %，特佳為9重量％〜20重量％。苯乙烯嵌段結構之含有比 例少於5重量％之情形時，容易產生由黏著劑層之黏聚力 不足所致之糊劑殘餘。苯乙烯嵌段結構之含有比例多於4〇 重量％之情形時，有黏著劑層變硬，對粗糖面無法得到良 好之黏著性之虞。 上述苯乙烯系嵌段共聚物具有乙烯-丁烯嵌段結構之情 形時’乙烯-丁烯嵌段結構中之源自丁烯之結構單元之含 有比例較佳為50重量％以上，進而較佳為6〇重量％以上， 特佳為70重量％以上，最佳為7〇重量％〜9〇重量％。若源自 丁烯之結構單元之含有比例在此範圍内，則可得到潤濕性 及黏著性優異，對粗縫面亦可良好地黏接之黏著劑層。 作為上述丙烯酸系熱塑性樹脂，例如可列舉聚甲基丙烯 158745.doc -14· 201233757 酸甲酯-聚丙烯酸丁酯-聚曱基丙烯酸曱酯共聚物（PMMA-PB A-PMMA共聚物）；於聚丙烯酸丁酯中含有羧酸作為官 能基之類型之PMMA-含有官能基之PBA-PMMA共聚物 等。丙烯酸系熱塑性樹脂可使用市售品。作為市售品之丙 烯酸系熱塑性樹脂之具體例’可列舉Kaneka股份有限公司 製造之商品名「NABSTAR」，Kuraray股份有限公司製造之 商品名「L A聚合物」等。 上述黏著劑層根據需要可含有其他成分。作為其他成 刀，例如可列舉烯烴系樹脂、聚矽氧系樹脂、液狀丙烯酸 系共聚物、聚乙烯亞胺、脂肪酸醯胺、磷酸酯、一般之添 加劑等。_L述黏t劑層中含有之其他成分之種類、數及量 可根據目的適當地設^。作為上述添加劑，例如可列舉黏 著賦予劑、軟化劑、抗老化劑、受阻胺系光穩定劑、紫外 線吸收劑、氡化鈣、氧化鎂、 ^矽或氧化鋅、氧化鈦等填充 劑或顏料等。 點著賦予劑之調配對提高黏著力有效。因黏著賦予齊" 調配量可避免由凝聚力下降所致之糊劑殘餘問題之產生 故根據被接著體適當地決宕杯立 决疋任思適當之調配量。通常，本 對於形成黏著劑之樹脂材料 ^ 竹100重1份’較佳為0〜40重| 物’更佳為0〜3 0重詈份，、任π + 夏重伤，進而較佳為0〜10重量份。 作為點著賦予劑，例如可 ^ % Ht 舉炷系黏著賦予樹脂、萜辦 糸黏者賦予樹脂、松香系 ^ 浐笪机# 者H予樹脂、酚系黏著賦予掏 月曰專。黏著賦予劑可單獨 ^ ^ ^ 更用，亦可併用2種以上。 作為烴糸黏著賦予樹脂， 如可列舉脂肪族系烴樹脂、 158745.doc •15- 201233757 方香族系烴樹脂（例如二甲苯樹料）、脂肪㈣環狀煙樹 :、脂肪族-芳香族系石油樹脂(例如苯乙烯侧共聚物 ”、脂肪族-脂環族石油樹脂、氫化煙樹脂、葉草味系樹 脂、薰草咔·茚系樹脂等。 作為莊稀系黏著賦予樹脂’例如可列舉“婦聚合物、 β-_合物等㈣系樹脂；使㈣系樹脂(例如苯改性、 :香族改性、氫化改性等)改性之改性輯系樹脂(例如祐 -紛系樹脂、苯乙烯改性㈣系樹脂、氫化莊稀系樹脂 等）等》 作為松黏著賦予樹脂，例如可列舉松脂膠、木松香 :未改性松香(生松香)、藉由氫化、歧化、聚合等使未改 性松香改性之改性松香（例如氫化松香、歧化松香、聚合 松香、其他化學性修飾之松香等）、其他各種松香衍生物 作為❹黏著賦予樹脂’例如可列舉可溶輕樹脂 (resole)型或酚醛清漆型之烷基苯酚等。 作為黏著賦予劑’就剝離性或耐錢等方面而言，較佳 為例如荒；I丨化學玉業公51製造之「磁。n p_i25」等氣化 系之黏著賦予#卜再者’黏著賦予劑亦可使用作為與稀煙 樹脂或熱塑性彈性體之混合物而市售者。 軟化劑之調配對於提高㈣力有效。作為軟化劑，例如 可列舉低分子量之二烯系聚合物、聚異丁稀、氫化聚異戊 二婦、氫化聚丁二婦或其等之衫物。作為該衍生物，例 如可示例於單末端或雙末端具有〇H基或c〇〇H基者。具體 158745.doe • 16 · 201233757 可列舉氫化聚丁二稀二醇、氮化聚丁二稀單醇、氨化聚異 戊烯一醇氫化聚異戊二烯單醇等《為更好地抑制對被 接著體之黏著性之提高，較佳為氛化聚丁二稀或氨化聚異 戊一烯等一烯系聚合物之氫化物或烯烴系軟化劑等。具體 而=可列舉Kuraray公司製造之「Kuraprene LIR-200」 等。該等軟化劑可單獨使用，，亦可併用2種以上。 軟化劑之分子量可適當地設定為任意之適當之量。若軟 化劑之分子量過小，則有成為物質自黏著層向被接著體轉 移或重剝離化等之原因之虞，另—方面，若軟化劑之分子量 過大’則有黏著力之提高效果變差之傾向，因此軟化劑之數 量平均分子量較佳為5000〜丨〇〇〇〇〇，更佳為丨〇〇〇〇〜5〇〇〇〇。 +使用軟化劑之情形時，其添加量可採用任意適當之量。 若軟化劑之添加量過多’則有高溫或暴露於屋外時之糊劑 殘餘增加之傾向，因此相對於形成黏著劑之樹脂材料⑽ 重量份’較佳為40重量份以下，更佳為2〇重量份以下，進 而較佳為10重量份以下。若相對於形成黏著劑之樹脂材料 ⑽重量份’軟化劑之添加量超過4〇重量份，則於高溫環 境下、暴露於屋外下之糊劑殘餘變得顯著。 、上述黏著劑層根據需要可進行單面或雙面表面處理。作 為表面處理，例如可列舉電量放雷痄 €箪敌電處理、紫外線照射處 理、火焰處理、電漿處理、濺鍍蝕刻處理等。 黏著劑層根據需要可含有任意適當之添加劑。作為黏著 劑層中含有之添加劑’例如可列舉填充劑、著色劑(染料 等）、抗氧化劑、金屬之螯合化合物、交聯劑（例如多官 158745.doc -17· 201233757 異氰酸醋、多官能胺、多官能醇等）等。黏著劑層中含有 之添加劑之種類、數及量可根據目的適當地設定。相對於 黏著劑層整體，添加劑之量較佳為5重量％以下，更佳為J 重量％以下。 作為上述填充劑，例如可列舉滑石、氧化鈦、氧化鈣、 ^化鎂、氧化辞、碳酸弼、石夕土、黏土、雲母、硫酸鎖、 晶鬚、水氧化㈣無機填充劑。填充劑之平均粒徑較佳為 0.1 (Lim〜1〇 μι^ 〇 -根據需要，可在實際使用之前’於黏著劑層上暫時黏貼 隔離膜等加以保護。 《《Β.表面保護膜之製造方法》》 本發明之表面保護膜可藉由任意適當之方法製造。例如 可列舉共擠Μ基材層之形成材料與黏著劑層之形成材料及 根據需要之其他層之形成材料之方法、形成基材層後塗佈 黏著劑層之形成材料之溶液並使之乾燥之方法、藉由壓延 成形法貼合各層之方法等。 ”-漏法可針對各層之形成材料分別使用擠壓機及共播 塵用模具，依照膨脹法、τ模法等進行。 實施例 以下’藉由實施例具體地說明本發明，但本發明並不限 疋於:亥等實施例。再者，實施例等中之試驗及評價方法如 下所述。又，「份」表示「重量份」。 (1)交又分級法 將聚烯烴系樹脂溶解於完全地溶解之溫度之鄰二氣苯 158745.doc 201233757 中，使聚合物冷卻，於填充有惰性載體之TREF(temperature rising elution fractionation，昇溫淋洗分級）管柱中生成薄聚 合物層。將以TREF分開之第一組分在線注入GPC(gel permeation chromatography，凝膠滲透層析儀）中，測定該 組分之分子量。在此期間，於TREF部中，升溫到下個設 定溫度進行溶出。第一組分之分子量分佈之測定結束後， 將第二組分在線注入GPC中。以下，一面階段性提高溫度 一面反覆進行同樣之操作，得到關於組成分佈之各組分之 分子量之詳細資訊。 測定機種：CFCT-150A型（三菱油化制） 管柱：ShodexAT-806Ms><3根 流速：1.0 mL/min 試樣濃度：〇·3 wt/vol% (加入0·1% BHT(butylated hydroxytoluene， 二丁基羥基曱苯）） 溶出溫度：0°C到135°C (2)拉伸彈性模數與柔軟性之評價 使用Tensilon型拉伸試驗機，根據利用在夾盤間10 mm、 拉伸速度為300 mm/min之條件下所測定的荷重-拉伸曲線 之切線所得之計算值求得基材之拉伸彈性模數。拉伸方向 平行於基材之縱向（MD方向）。 因拉伸彈性模數高之表面保護膜柔軟性差，故以此作為 柔軟性之評價標準，將拉伸彈性模數未達700 N/mm2之情 形設為◎，將拉伸彈性模數為700 N/mm2以上而未達800 N/mm2之情形設為〇，將拉伸彈性模數為800 N/mm2以上 158745.doc •19· 201233757 之情形設為χ。 (3)污染性之評價 將所得之表面保護膜藉由2 kg壓輥反覆壓接2次而貼附the above. Examples of the form containing two or more kinds thereof include mixing or copolymerization. A commercially available product can be used as the D polyolefin resin. The tensile modulus of the substrate layer is preferably from 15 〇 to 84 〇 N/mm 2 , more preferably from 200 to 800 N/mm 2 . When the tensile elastic modulus of the base material layer is less than 15 〇 N/mm 2 , the operation of the base material layer becomes difficult, the adhesion is lowered, or the peeling operation becomes difficult. When the tensile elastic modulus of the base material layer exceeds 84 〇 N/mm 2 , the flexibility of the base material layer may be insufficient. The base material layer may contain any other resin as appropriate within the range which does not impair the effects of the present invention. In the base material layer, any appropriate additive may be contained as needed. 158745.doc -9- 201233757 The additive which may be contained in the base material layer, for example, an ultraviolet absorber, a heat stabilizer, a filler, a lubricant, a colorant (dye, etc.), an antioxidant, an anti-eye grease, Anti-blocking agent, foaming agent, polyethyleneimine, etc. The kind, number, and amount of the additives contained in the substrate layer can be appropriately set depending on the purpose. Examples of the ultraviolet absorber ** include a benzotriazole-based compound, a benzophenone-based compound, and a benzoate-based compound. The content of the above ultraviolet absorbing agent may be any appropriate content as long as it does not bleed out during the formation of the laminated film. Typically, it is preferably 0.01 parts by weight to 5 parts by weight based on 100 parts by weight of the polyolefin resin in the base material layer. Examples of the heat-resistant stabilizer include a hindered amine compound, a phosphorus compound, and a cyanoacrylate compound. The content of the above heat-resistant stabilizer may be any appropriate content as long as it does not bleed out during the formation of the laminated film. Typically, it is preferably 0.01 parts by weight to 5 parts by weight based on 100 parts by weight of the polyolefin resin in the base material layer. Examples of the filler include inorganic fillers such as talc, titanium oxide, calcium oxide, magnesium oxide, zinc oxide, calcium carbonate, alumina, clay, mica, barium sulfate, whiskers, and magnesium hydroxide. The average particle diameter of the filler is preferably from 0 to 1 μm to 10 μm β of the filler, and preferably 100 parts by weight based on the polyolefin resin in the substrate layer. Parts by weight to 200 parts by weight. In the case where the substrate layer comprises a plurality of layers, the substrate layer may contain any other suitable layer. As such other layers, for example, a surface layer (also referred to as a release layer) can be mentioned. The surface layer may be included on the surface side of the substrate layer on the opposite side to which the adhesive layer is provided. In the case where the surface layer is contained in the base material layer, for example, when the surface-preserving film of the present invention is stored in a roll shape m, the surface layer and the adhesive layer are laminated. Since &' requires good peelability of the surface layer and the adhesive layer, it is preferred that the surface layer contains a release agent. When the surface layer contains a release agent, it is possible to prevent adhesion of the surface layer and the adhesive layer in a state in which the surface protective film of the present invention is superposed on each other in a roll form. &, there is no need to cover the surface layer with a barrier film. When the surface layer is formed by coating, as the release agent, for example, a long-bonded base-based release agent, a fluorine-containing long-chain base-based release agent, a polyoxin-based release agent, or the like can be used. Examples of the (iv) oxygen__ include an addition reaction type thermosetting type, a condensation reaction type thermosetting type, and a radiation curing type using ultraviolet rays or electron beams. By co-extruding the surface layer, the thickness of the surface layer is preferably 2 μηη 10 μιηη, and more preferably 2 μιη〜8 qing, particularly preferably 2 〜〜(4). When the thickness of the surface layer is thinner than 2 (four), the function as a surface layer may not be sufficiently exhibited. When the thickness of the surface layer is thicker than 1 〇 μηη, the mechanical properties of the surface layer affect the mechanical properties of the entire surface protective film, and the operation of the surface protective film is deteriorated. As the main forming material of the surface layer, any appropriate thermoplastic resin can be used. As a main forming material of the surface layer, for example, various vinyls such as polyethylene, polypropylene, TPO (The_plastie p〇ly Glefin • a modified hydrocarbon, an α-olefin, and an ethyl acetate or a methyl propyl group; A thermoplastic resin containing a copolymer of a compound, a polyamidamide, a polyester 'polycarbonate, a polyurethane, a polyethylene, etc. as a main component 158745.doc 201233757 Grease. These materials may be only one type, and Two or more types may be used. The long-chain alkyl-based release agent is preferably used as the release agent. The long-chain alkyl-based release agent contains a long-chain alkyl-based polymer, and the long-chain alkyl-based south molecule is heated at any appropriate temperature. In the solvent, a polymer containing a reactive group may be reacted with a compound containing an alkyl group reactive with the reactive group. When the reaction occurs, a catalyst may be used as needed. As the catalyst, for example, tin may be mentioned. The compound or the tertiary amine, etc. The hydroxyl group, the amine group, the carboxyl group, the maleic anhydride group, etc. are mentioned as a reactive group. The polymer which contains this reactive group is ethylene-vinyl alcohol copolymer and polyethylene. Alcohol, polyethylene Imine, polyvinylamine, styrene-maleic anhydride copolymer, etc. Among them, ethylene-vinyl alcohol copolymer is preferred. Further, the so-called ethylene-vinyl alcohol copolymer, the concept also includes ethylene-vinyl acetate copolymer Part of the saponified product. The concept of polyvinyl alcohol is also a partial saponified product of polyvinyl acetate. The carbon number of the alkyl group is preferably from 8 to 3, and more preferably from 12 to 22. When the carbon number of the alkyl group is within this range, the surface layer (C) having excellent releasability can be obtained. Specific examples of such an alkyl group include dodecyl octadecyl group and dodecyl group. Examples of the compound containing such an alkyl group (that is, a compound containing an alkyl group reactive with the above reactive group) include isocyanate, isocyanate, and isocyanate (12) The isocyanic acid is the same as isocyanic acid; the chlorine, the amine, and the material are preferred. Among them, the isocyanate is preferred. The weight average molecular weight of the long-chain alkyl polymer is preferably 10,000 to 1,000,000'. Preferably, it is 2〇〇〇〇~1〇〇〇〇〇〇. If long chain alkyl 158745 .doc -12- 201233757 The weight average molecular weight of the south molecular molecule is within this range. A surface layer having excellent releasability can be obtained. The content of the long-chain alkyl-based release agent in the surface layer is preferably from 丨% by weight to 50%. The weight %, further preferably 2% by weight to 3% by weight, particularly preferably 5 parts by weight to 20% by weight. When the content ratio is less than [% by weight, it is impossible to obtain a long-chain alkyl group. The effect of the release agent is as follows: When the content is more than 5% by weight, the amount of exudate may be formed. The surface layer may contain any appropriate additives as needed. "A-2. Adhesive layer (B)" The adhesive contained in the adhesive layer may be any suitable adhesive insofar as it does not impair the effects of the present invention. The adhesive constituting the adhesive layer may be one type or two or more types. The thickness of the above adhesive layer is preferably! Μιη~3〇〇 μιη, and further preferably 2 μιη~1〇〇 μιη, especially preferably 3 calls ~5〇. Examples of the adhesive constituting the pressure-sensitive adhesive layer include a rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, and a polyoxygen-based pressure-sensitive adhesive. A thermoplastic adhesive can also be used as the above adhesive. The material constituting the thermoplastic adhesive may, for example, be any suitable styrene block copolymer or acrylic thermoplastic resin as the adhesive material. • Specific examples of the styrene block copolymer include a styrene-based diblock copolymer such as styrene-ethylene-butene copolymer (SEB); and styrene-butadiene-styrene copolymerization. (SBS), SBS hydride (styrene-ethylene-butylene-styrene copolymer (SEBS)), styrene-isoprene-phenylene copolymer (SIS), SIS hydride (benzene) Ethylene _ Ethylene-propylene 158745.doc •13- 201233757 Styrene copolymer (SEPS), styrene-isobutylene-styrene copolymer (SIBS) and other styrene-type triblock copolymers; styrene - styrene-butadiene (SBSB) and other styrene-based ABAB type tetrablock copolymers; styrene-butadiene-styrene-butadiene-styrene (SBSBS) and other styrene-based systems ABABA type pentablock copolymer; styrene-based multi-block copolymer comprising the above-mentioned AB repeating unit; ethylene double bond of styrene-based random copolymer such as styrene-butadiene rubber (SBR) Hydrogenated hydride, and the like. As a commercial item, for example, "G1657" (styrene-based elastomer) manufactured by Kraton Polymers Co., Ltd., or the like can be mentioned. These copolymers may be used alone or in combination of two or more. The content ratio of the styrene block structure in the styrene block copolymer is preferably from 5% by weight to 40% by weight, further preferably from 7% by weight to 3% by weight, particularly preferably from 9% by weight to 20% by weight. weight%. When the content ratio of the styrene block structure is less than 5% by weight, the residue of the paste due to insufficient cohesive force of the adhesive layer is liable to occur. When the content ratio of the styrene block structure is more than 4% by weight, the adhesive layer becomes hard and the adhesiveness of the raw sugar is not obtained. When the styrene block copolymer has an ethylene-butene block structure, the content of the structural unit derived from butene in the ethylene-butene block structure is preferably 50% by weight or more, and further preferably It is 6% by weight or more, particularly preferably 70% by weight or more, and most preferably 7% by weight to 9% by weight. When the content ratio of the structural unit derived from butene is within this range, an adhesive layer which is excellent in wettability and adhesiveness and which can adhere well to a rough surface can be obtained. Examples of the acrylic thermoplastic resin include polymethyl propylene 158745.doc -14·201233757 methyl methacrylate-polybutyl acrylate-poly(decyl methacrylate) copolymer (PMMA-PB A-PMMA copolymer); A PMMA-functional PBA-PMMA copolymer or the like having a carboxylic acid as a functional group in polybutyl acrylate. A commercially available product can be used for the acrylic thermoplastic resin. Specific examples of the acrylic resin which is a commercially available product include the product name "NABSTAR" manufactured by Kaneka Co., Ltd., and the product name "L A polymer" manufactured by Kuraray Co., Ltd., and the like. The above adhesive layer may contain other components as needed. Examples of the other moldings include an olefin resin, a polyoxymethylene resin, a liquid acrylic copolymer, polyethyleneimine, a fatty acid decylamine, a phosphate ester, and a general additive. The type, number, and amount of other components contained in the adhesive layer may be appropriately set according to the purpose. Examples of the above-mentioned additives include an adhesion-imparting agent, a softener, an anti-aging agent, a hindered amine-based light stabilizer, an ultraviolet absorber, a calcium telluride, a magnesium oxide, a ruthenium or a filler such as zinc oxide or titanium oxide, or a pigment. . It is effective to improve the adhesion by aligning the ingredients. The amount of the paste can be avoided due to the adhesion, and the problem of the residue of the paste due to the decrease in the cohesive force can be avoided. Therefore, it is appropriate to determine the appropriate amount according to the adherend. Generally, the resin material for forming an adhesive is 1 part by weight of bamboo 100, preferably 0 to 40 weights, more preferably 0 to 3 0 parts by weight, and π + summer heavy injury, and further preferably 0. ~10 parts by weight. As the point-imparting agent, for example, it is possible to impart a resin to the resin, a resin to be added to the adhesive, a rosin system, a resin, and a phenol-based adhesive. The adhesion-imparting agent may be used alone or in combination of two or more. Examples of the hydrocarbon hydrazine adhesion-imparting resin include aliphatic hydrocarbon resins, 158745.doc •15-201233757, fragrant aromatic hydrocarbon resins (for example, xylene tree materials), fat (tetra) ring-shaped tobacco trees, and aliphatic-aromatics. It is a petroleum resin (for example, a styrene side copolymer), an aliphatic-alicyclic petroleum resin, a hydrogenated smoky resin, a leafy scented resin, a scented scented enamel resin, or the like. Listed as "women's polymer, β-form, etc. (four)-based resin; modified series resin modified by (four)-based resin (for example, benzene modification, : fragrance modification, hydrogenation modification, etc.) (for example, You-Feng Resin, styrene-modified (tetra) resin, hydrogenated rare resin, etc.) Examples of the resin to be loosely applied include rosin gum, wood rosin: unmodified rosin (raw rosin), hydrogenation, disproportionation, A modified rosin (for example, hydrogenated rosin, disproportionated rosin, polymerized rosin, other chemically modified rosin, etc.) which is modified by unmodified rosin, and other various rosin derivatives as a ruthenium adhesion-imparting resin, for example, may be exemplified as soluble and light. Resole type or A novolac type alkyl phenol, etc. As an adhesion-imparting agent, it is preferable, for example, in terms of peeling property or money resistance, etc., and gasification system such as "magnetic.n p_i25" manufactured by Izumi Chemical Jade Co., Ltd. 51. The adhesion imparting agent can also be used as a mixture with a thin smoke resin or a thermoplastic elastomer. The blending of the softener is effective for increasing the (iv) force. As the softener, for example, a low molecular weight can be cited. a diene polymer, a polyisobutylene, a hydrogenated polyisoprene, a hydrogenated polybutan, or the like. As the derivative, for example, a thiol group or a c group may be exemplified at a single terminal or a double terminal. 〇〇H base. Specific 158745.doe • 16 · 201233757 Examples of hydrogenated polybutylene dilute diol, nitrided polybutylene dilute monool, ammoniated polyisoprene monool hydrogenated polyisoprene monool, etc. In order to better suppress the adhesion to the adherend, a hydride or an olefin softener such as an aromatic polymer such as polybutylene or aminated polyisoprene is preferred. And = "Kuraprene LIR-200" manufactured by Kuraray Co., Ltd., etc. can be cited. The softening agent may be used singly or in combination of two or more kinds. The molecular weight of the softening agent may be appropriately set to any appropriate amount. If the molecular weight of the softening agent is too small, the substance may be transferred from the adhesive layer to the adherend or For reasons of heavy peeling, etc., if the molecular weight of the softener is too large, the effect of improving the adhesive strength tends to be poor, so the number average molecular weight of the softener is preferably 5000 to 丨〇〇〇〇〇. More preferably, it is 〇〇〇〇~5〇〇〇〇. + When using a softener, the amount of addition can be any appropriate amount. If the amount of softener added is too high, there is high temperature or when exposed to the outside. The resin residue (10) by weight is preferably 40 parts by weight or less, more preferably 2 parts by weight or less, still more preferably 10 parts by weight or less based on the weight of the resin material (10). When the amount of the softener added to the resin material (10) by weight of the adhesive exceeds 4 parts by weight, the residue remaining in the high temperature environment and exposed to the outside becomes remarkable. The above adhesive layer can be subjected to single-sided or double-sided surface treatment as needed. As the surface treatment, for example, a power discharge device such as an enemy power treatment, an ultraviolet irradiation treatment, a flame treatment, a plasma treatment, a sputtering etching treatment, and the like can be cited. The adhesive layer may contain any appropriate additives as needed. Examples of the additive contained in the adhesive layer include a filler, a colorant (dye, etc.), an antioxidant, a metal chelate compound, and a crosslinking agent (for example, dormitories 158745.doc -17· 201233757 isocyanic acid, Polyfunctional amines, polyfunctional alcohols, etc.). The kind, number, and amount of the additives contained in the adhesive layer can be appropriately set depending on the purpose. The amount of the additive is preferably 5% by weight or less, more preferably J% by weight or less, based on the entire adhesive layer. Examples of the filler include talc, titanium oxide, calcium oxide, magnesium oxide, oxidized hydrazine, strontium carbonate, terracotta, clay, mica, sulfuric acid lock, whisker, and water-oxidized (iv) inorganic filler. The average particle diameter of the filler is preferably 0.1 (Lim~1〇μι^ 〇 - if necessary, it can be temporarily adhered to the adhesive layer on the adhesive layer before use). "Β. Surface protective film manufacturing The surface protective film of the present invention can be produced by any appropriate method, and examples thereof include a method of forming a material of a coextruded base material layer and a material for forming an adhesive layer, and a method of forming a material of another layer as needed. a method of applying a solution of a material for forming an adhesive layer to a base material layer, drying the layer, a method of laminating the layers by a calender molding method, etc. The "drain method" may respectively use an extruder and a total of materials for forming each layer. The mold for dusting is carried out according to the expansion method, the τ mode method, etc. Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the examples such as: Hai, etc. The test and evaluation methods are as follows: “Parts” means “parts by weight.” (1) The cross-linking method dissolves the polyolefin resin in the completely dissolved temperature of the adjacent gas benzene 158745.doc 201233757, The polymer is cooled, and a thin polymer layer is formed in a TREF (temperature rising elution fractionation) column filled with an inert carrier. The first component separated by TREF is injected into GPC (gel permeation chromatography, gel). In the permeation chromatography apparatus, the molecular weight of the component is measured. During this period, in the TREF section, the temperature is raised to the next set temperature for elution. After the measurement of the molecular weight distribution of the first component is completed, the second component is taken online. Injecting into GPC. In the following, the same operation is repeated while increasing the temperature step by step, and detailed information on the molecular weight of each component of the composition distribution is obtained. Measuring machine type: CFCT-150A type (Mitsubishi Olefin) Column: ShodexAT- 806Ms><3 flow rates: 1.0 mL/min Sample concentration: 〇·3 wt/vol% (0. 1% BHT (butylated hydroxytoluene)) Dissolution temperature: 0°C to 135 °C (2) Tensile modulus and flexibility were evaluated using a Tensilon tensile tester, based on the load measured at 10 mm between the chucks and a tensile speed of 300 mm/min. The calculated value of the tangent of the curve is used to obtain the tensile elastic modulus of the substrate. The stretching direction is parallel to the longitudinal direction of the substrate (MD direction). The surface protective film with high tensile modulus is poor in flexibility, so The evaluation criteria of the flexibility are ◎ when the tensile elastic modulus is less than 700 N/mm2, and 〇 when the tensile elastic modulus is 700 N/mm2 or more and less than 800 N/mm2. The tensile modulus of elasticity is 800 N/mm2 or more and 158745.doc •19·201233757 is set to χ. (3) Evaluation of the contamination The obtained surface protective film was attached by repeated pressing and pressing 2 kg of a 2 kg press roll.
於SUS430BA精加工板上後，在50°C下放置2週後，在23°C 下放置2小時，以目視確認剝離時對被接著體之污染性。 將無污染者設為◎，將微量之污染係污染程度輕微者設 為〇’將污染程度較大者設為X。 剝離條件：23°Cx50%RH 剝離速度：300 mm/min 180度剝離 [實施例1] 使用藉由交又分級法所得之〇°c以上而未達201時之樹 月曰溶出3為總樹脂量的丨7·2重量。/〇、藉由交叉分級法所得 之20°C以上而未達75«c時之樹脂溶出量為總樹脂量的7 〇 重量°/。、藉由交叉分級法所得之75〇c以上而未達n5<>c時 之樹脂溶出量為總樹脂量的7〇 5重量％之聚烯烴系樹脂， 藉由τ模法製作厚度40 μιη之基材膜。將橡膠系黏著劑（將 Kraton P〇lymers公司製造之「G1657」1〇〇份與荒川化學工 業公司製造之「Arkon ρ·125」3〇份溶解於甲苯者）以乾燥 後之黏著劑層之厚度成為5 μιη之方式塗佈於此基材膜之單 面，在80 C下乾燥5分鐘，得到表面保護膜。所得之表面 保護膜在將黏著劑層貼合於上述基材膜之狀態下，在5〇t 下保存1週。 將以此方式獲得之表面保護膜（1)之評價結果示於表1。 158745.doc •20· 201233757 [實施例2] 除使用藉由交叉分級法所得之Ot：以上而未達2〇<t時之 樹脂溶出量為總樹脂量的16.9重量％、藉由交叉分級法所 得之20°C以上而未達75°C時之樹脂溶出量為總樹腊量的 1〇.2重量％、藉由交又分級法所得之75t以上而未達125它 時之樹脂溶出量為總樹脂量的68.丨重量0/〇之聚烯烴系樹脂 以外，以與實施例[相同之方式，得到表面保護膜（2)。基 材膜之厚皮為40 μιη，黏著劑層之厚度為5 μηι。 將所得之表面保護膜（2)之評價結果示於表i。 [實施例3] 除使用藉由交又分級法所得之0〇C以上而未達2〇c>c時之 樹脂溶出量為總樹脂量的16 4重量％、藉由交叉分級法所 得之20 C以上而未達75°C時之樹脂溶出量為總樹脂量的 13.5重量％、藉由交叉分級法所得之75〇c以上而未達 時之樹脂溶出量為總樹脂量的65_9重量％之聚烯烴系樹脂 以外，以與實施例1相同之方式’得到表面保護膜（3)。基 材膜之厚度為40μιη，黏著劑層之厚度為5μιη。 將所得之表面保護膜之評價結果示於表1。 [實施例4] 除使用藉由交又分級法所得之〇r以上而未達2{rc時之 樹脂溶出量為總樹脂量的16.0重量％、藉由交叉分級法所 得之20 C以上而未達75它時之樹脂溶出量為總樹脂量的 16.8重量/〇、藉由交又分級法所得之75它以上而未達它 時之樹脂溶出量為總樹脂量的63 5重量0/〇之聚烯烴系樹脂 158745.doc -21- 201233757 以外’以與實施例Μ同之方式’得到表面保護膜(4)。基 材膜之厚度為40 μηι，黏著劑層之厚度為5 μιη。 將所得之表面保護膜（4)之評價結果示於表i。 [實施例5] 除使用藉由交又分級法所得之(TC以上而未達2〇t時之 樹脂溶出量為總樹脂量的15.5重量％、藉由交又分級法所 得之20t以上而未達75t時之樹脂溶出量為總樹脂量的 ΐ〇·3重量％、藉由交又分級法所得之75t以上而未達125它 時之樹脂溶出量為總樹脂量的69.5重量％之聚烯烴系樹脂 以外，以與實施例1相同之方式，得到表面保護膜（5)。基 材膜之厚度為40μιη，黏著劑層之厚度為5 μιη。 將所得之表面保護膜（5)之評價結果示於表1。 [實施例6] 除使用藉由交又分級法所得之〇〇c以上而未達2〇(>c時之 樹脂溶出量為總樹脂量的132重量％、藉由交叉分級法所 得之20°C以上而未達75t時之樹脂溶出量為總樹脂量的 39·4重量％、藉由交叉分級法所得之75°C以上而未達125〇c 時之樹脂溶出量為總樹脂量的47·4重量％之聚烯烴系樹脂 以外，以與實施例i相同之方式，得到表面保護膜（6)。基 材膜之厚度為40 μιη，黏著劑層之厚度為5 μιη。 將所得之表面保護膜（6)之評價結果示於表j。 [實施例7] 除使用藉由交又分級法所得之〇。(：以上而未達20°C時之 樹月曰冷出量為總樹脂量的8 9重量％、藉由交又分級法所得 158745.doc -22- 201233757 之2(TC以上而未達75°C時之樹脂溶出量為總樹脂量的74 重量％、藉由交叉分級法所得之75t以上而未達125。〇時 之樹脂溶出量為總樹脂量的83.7重量％之聚烯烴系樹脂以 外，以與實施例1相同之方式，得到表面保護膜（？）。基材 膜之厚度為40 μιη ’黏著劑層之厚度為5 μιη。 將所得之表面保護膜（7)之評價結果示於表1。 [實施例8] 除使用藉由交又分級法所得之(TC以上而未達2〇<t時之 樹脂溶出量為總樹脂量的12.3重量％、藉由交叉分級法所 仵之20 C以上而未達75t時之樹脂溶出量為總樹脂量的 23.3重量％ '藉由交又分級法所得之75〇c以上而未達125它 時之樹脂溶出量為總樹脂量的60.7重量％之聚烯烴系樹脂 以外，以與實施例1相同之方式，得到表面保護膜。基 材膜之厚度為40 μηι ’黏著劑層之厚度為5 μιη。 將所得之表面保護膜（8)之評價結果示於表1。 [比較例1] 除使用藉由交又分級法所得之〇〇C以上而未達2(rc時之 樹月曰备出量為總樹脂量的5 〇 · 〇重量％、藉由交叉分級法所 得之20 C以上而未達75°C時之樹脂溶出量為總樹脂量的 24.6重量％、藉由交又分級法所得之75它以上而未達125它 時之樹脂溶出量為總樹脂量的25.4重量。/〇之聚烯烴系樹脂 以外’以與實施例i相同之方式，得到表面保護膜（C1)。 基材膜之厚度為40 μιη，黏著劑層之厚度為5 μιη。 將所得之表面保護膜（C1)之評價結果示於表1。 158745.doc •23· 201233757 [比較例2] 除使用藉由交叉分級法所得之〇°C以上而未達2〇t時之 樹脂溶出量為總樹脂量的〇.1重量％、藉由交叉分級法所得 之20 C以上而未達75 C時之樹脂溶出量為總樹脂量的39 6 重量％、藉由交又分級法所得之75。〇以上而未達125它時 之樹脂溶出量為總樹脂量的6G.3重量％<輯㈣㈣以 外’以與實施例1相同之方 i，^ ^ m ^ ^ 于巧表面保護膜（C2)。基 '厗又為4〇 μηι，黏著劑層之厚产 胳斛π七士 又命i μιη。 將所传之表面保護膜（C2)之評價結果示於表卜 158745.doc •24· 201233757 【1<】 比較例2 246000 〇 1 39.6 | i 60.3 | X 00 Ο 比較例1 364000 | 50,0 1 1 24.6 I 1 25.4 | ◎ 220 X |實施例8 | 311200 | 丨 12.3 | | 23.3 1 | 60.7 I ◎ § VO ◎ |實施例7 1 366000 〇\ 00 寸 | 83.7 1 〇 710 1 〇 |實施例6 1 255000 丨 13.2 I I 39.4 | 丨楊| ◎ 270 〇 |實施例5 1 373800 | 16.6 1 1肥1 | 69.5 1 〇 〇 |實施例4 1 347000 | 16.0 1 | 16.8 | | 63.5 I ◎ 480 〇 I實施例31 361000 Γ 16.4 | κη [65.9 | ◎ o 〇 |實施例2 1 376000 1 16.9 I Μ〇·2 I | 68.1 | ◎ 620 〇 實施例1 388000 1 17.2 I ρ 1 70.5 | 〇 760 〇 重量平均分子量 0°C以上而未達20°c 20°C以上而未達75°C 75°C以上而未達125°C 柔軟性 1 雄 污染率 交叉分級 溶出量 [重量％] 158745.doc -25- 201233757 如表1所示，判定本發明之表面保護膜具有優異之柔軟 性’且可充分抑制被接著體表面之污染性。 產業上之可利用性 本發明之表面保護膜作為用以保護金屬鏡面板、破 板、ΠΌ膜等光學膜等之表面之表面保護膜較為有用。 【圖式簡單說明】 圖！係本發明之較佳實施方式之表面保 圖。 微略剖面 【主要元件符號說明】 10 黏著片材 12 基材層 14 黏著劑層 158745.doc -26 -After SUS430BA finishing board, it was left at 50 ° C for 2 weeks, and then left at 23 ° C for 2 hours to visually confirm the contamination of the adherend at the time of peeling. The non-polluting person is set to ◎, and the slight contamination level is set to 〇', and the larger degree of pollution is set to X. Peeling conditions: 23 ° C x 50% RH Peeling speed: 300 mm / min 180 degree peeling [Example 1] The use of the 又 °c obtained by the cross-fractionation method and less than 201 Å of the tree 曰 曰 3 is the total resin The amount of 丨 7.2 weight. / 〇, the resin eluted by the cross-fractionation method at 20 ° C or more and less than 75 « c is 7 〇 weight ° / of the total resin amount. A polyolefin resin having a resin elution amount of 75 〇c or more and less than n5 <>c when the resin is eluted by a cross-classification method is 7 〇 5 wt% of the total resin amount, and a thickness of 40 μm is produced by a τ-die method. The substrate film. A rubber-based adhesive (1 part of "G1657" manufactured by Kraton P〇lymers Co., Ltd. and "Arkon ρ·125" manufactured by Arakawa Chemical Industries Co., Ltd.) was dissolved in toluene) to dry the adhesive layer. The film was applied to one side of the substrate film so as to have a thickness of 5 μm, and dried at 80 C for 5 minutes to obtain a surface protective film. The obtained surface protective film was stored at 5 Torr for one week while the adhesive layer was bonded to the base film. The evaluation results of the surface protective film (1) obtained in this manner are shown in Table 1. 158745.doc •20·201233757 [Example 2] Except that Ot obtained by the cross-fraction method was used, and the amount of resin eluted less than 2 〇<t was 16.9% by weight of the total resin amount, by cross-grading The resin elution amount of 20 ° C or more and less than 75 ° C obtained by the method is 1 〇. 2 wt% of the total amount of the wax, and the resin is eluted by the cross-fractionation method of 75 t or more and less than 125. A surface protective film (2) was obtained in the same manner as in Example [Example 2 except that the amount of the total resin amount was 68.% by weight of the polyolefin resin. The base film has a thickness of 40 μm and the adhesive layer has a thickness of 5 μη. The evaluation results of the obtained surface protective film (2) are shown in Table i. [Example 3] The amount of resin eluted in the case of using 0 〇C or more and less than 2 〇c>c by the cross-fractionation method was 16% by weight of the total amount of the resin, and 20 by the cross-fraction method. The amount of resin eluted when C is not more than 75 ° C is 13.5% by weight of the total amount of the resin, and 75 〇 c or more obtained by the cross-fraction method is not more than 65 9% by weight of the total amount of the resin. A surface protective film (3) was obtained in the same manner as in Example 1 except for the polyolefin resin. The thickness of the base film was 40 μm, and the thickness of the adhesive layer was 5 μm. The evaluation results of the obtained surface protective film are shown in Table 1. [Example 4] The amount of resin eluted in the case of less than 2 {rc by using the cross-fraction method and the above-mentioned grading method was 16.0% by weight of the total resin amount, and 20 C or more obtained by the cross-fraction method. The resin dissolution amount of up to 75 is 16.8 wt/〇 of the total resin amount, 75 of which is obtained by the cross-fractionation method, and the resin elution amount when it is not reached is 63 5 wt% of the total resin amount. The surface protective film (4) was obtained in the same manner as in the Example except for the polyolefin resin 158745.doc -21 - 201233757. The thickness of the base film was 40 μηι, and the thickness of the adhesive layer was 5 μηη. The evaluation results of the obtained surface protective film (4) are shown in Table i. [Example 5] Except that the amount of resin eluted by the cross-fractionation method was less than 2 〇t, the resin elution amount was 15.5% by weight of the total resin amount, and 20 t or more obtained by the cross-fractionation method was not used. The amount of resin eluted at 75t is ΐ〇·3 wt% of the total resin amount, and the polyolefin obtained by the cross-fractionation method is 75t or more and less than 125. The amount of resin eluted is 69.5% by weight of the total resin. A surface protective film (5) was obtained in the same manner as in Example 1 except for the resin. The thickness of the substrate film was 40 μm, and the thickness of the adhesive layer was 5 μm. Evaluation results of the obtained surface protective film (5) It is shown in Table 1. [Example 6] The amount of resin eluted was less than 2% (>c when the amount of resin eluted was 132% by weight of the total amount of resin, by using 〇〇c or more obtained by the cross-fractional method, and by cross The resin elution amount at 20 ° C or more and less than 75 t obtained by the classification method is 39.4 wt% of the total resin amount, and the resin elution amount at 75 ° C or more and less than 125 ° C obtained by the cross-classification method In the same manner as in Example i, except for the polyolefin resin having a total resin content of 44.7% by weight, The surface protective film (6) was obtained. The thickness of the base film was 40 μm, and the thickness of the adhesive layer was 5 μm. The evaluation results of the obtained surface protective film (6) are shown in Table j. [Example 7] The sputum obtained by the cross-leveling method. (: The above-mentioned chilling amount of the tree 曰 未 at 20 ° C is 89% by weight of the total resin, and 158745.doc -22- by the cross-grading method 2, 201233757 (the amount of resin eluted when the temperature is less than TC and not higher than 75 °C is 74% by weight of the total resin amount, and 75 times or more obtained by the cross-classification method is less than 125. The amount of resin eluted in the case of 〇 is the total amount of resin. A surface protective film (?) was obtained in the same manner as in Example 1 except that the polyolefin resin was 83.7% by weight. The thickness of the substrate film was 40 μm, and the thickness of the adhesive layer was 5 μm. The evaluation results of the protective film (7) are shown in Table 1. [Example 8] Except that the amount of resin eluted by the cross-fractionation method (TC or more and less than 2 〇 < t was 12.3 of the total resin amount) % by weight, the amount of resin eluted by the cross-fractionation method of 20 C or more and less than 75 t is the total amount of resin 23.3% by weight, in the same manner as in the first embodiment, except that the amount of the resin eluted by the crosslinking method is 75 〇c or more and the amount of the resin eluted is less than 60.7% by weight of the total resin amount. A surface protective film was obtained. The thickness of the base film was 40 μm. The thickness of the adhesive layer was 5 μm. The evaluation results of the obtained surface protective film (8) are shown in Table 1. [Comparative Example 1] In addition, the 〇〇C of the classification method is less than 2 (the amount of the sap of the tree is 5 〇·〇% by weight of the total resin amount, 20 C or more by the cross-classification method and less than 75°) The amount of resin eluted at C was 24.6 wt% of the total amount of the resin, and the amount of resin eluted by the cross-fractionation method of 75 or more and less than 125 was 25.4 wt% of the total amount of the resin. The surface protective film (C1) was obtained in the same manner as in Example i except for the polyolefin resin. The thickness of the substrate film was 40 μm, and the thickness of the adhesive layer was 5 μm. The evaluation results of the obtained surface protective film (C1) are shown in Table 1. 158745.doc •23· 201233757 [Comparative Example 2] The amount of resin eluted in the range of less than 2 〇t, which is obtained by the cross-fraction method, is less than 2 〇t, which is 〇.1% by weight of the total amount of resin, by cross The resin elution amount of 20 C or more and less than 75 C obtained by the classification method was 396% by weight of the total resin amount, and 75 was obtained by the cross-fraction method. The amount of resin eluted above 1.25 is 6 G. 3 wt% of the total amount of resin < (4) (4) except for the same formula as in Example 1, i ^ ^ m ^ ^ in a surface protective film (C2) ). The base '厗 is 4〇 μηι, the thick layer of the adhesive layer 斛 斛 七 又 又 又 i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i The evaluation result of the surface protective film (C2) transmitted is shown in Table 158745.doc •24·201233757 [1<] Comparative Example 2 246000 〇1 39.6 | i 60.3 | X 00 Ο Comparative Example 1 364000 | 50,0 1 1 24.6 I 1 25.4 | ◎ 220 X | Example 8 | 311200 | 丨 12.3 | | 23.3 1 | 60.7 I ◎ § VO ◎ | Example 7 1 366000 〇 \ 00 inch | 83.7 1 〇 710 1 〇 | 6 1 255000 丨13.2 II 39.4 | 丨杨| ◎ 270 〇|Example 5 1 373800 | 16.6 1 1Fat 1 | 69.5 1 〇〇|Example 4 1 347000 | 16.0 1 | 16.8 | | 63.5 I ◎ 480 〇I Example 31 361000 Γ 16.4 | κη [65.9 | ◎ o 〇 | Example 2 1 376000 1 16.9 I Μ〇·2 I | 68.1 | ◎ 620 〇 Example 1 388000 1 17.2 I ρ 1 70.5 | 〇 760 〇 Weight average Molecular weight above 0 °C and less than 20 °c 20 °C or more but less than 75 °C 75 °C or more and less than 125 °C Softness 1 Male pollution rate Cross-graded dissolution amount [% by weight] 158745.doc -25 - 201233757 As shown in Table 1, it was judged that the surface protective film of the present invention has excellent flexibility" and the contamination of the surface of the adherend can be sufficiently suppressed. Industrial Applicability The surface protective film of the present invention is useful as a surface protective film for protecting the surface of an optical film such as a metal mirror panel, a broken plate or a ruthenium film. [Simple diagram of the diagram] Figure! It is a surface preservation of a preferred embodiment of the present invention. Micro profile [Major component symbol description] 10 Adhesive sheet 12 Substrate layer 14 Adhesive layer 158745.doc -26 -