200923133 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種金屬外殼，尤其係關於一種表面 具有烤漆之金屬外殼及其製造方法。 【先前技術】 隨者消費水準之提高，消f者對電子產品之要求不 僅注重其品質，對其外觀表面之f感及觸感也愈來愈關 注’具有特殊質感及柔軟觸感之電子產品在市場 具競爭力。 φ 、習知電子產品外觀表面通常採用各種顏色之油漆噴 塗來達到豐富多彩之色彩效果油漆層色彩雖麸· 富’卻不具備柔軟舒適之手感，使用起來不太舒適。： = = 皮革漆被應用到了行動電話、鍵盤及 梦德 σ°外觀件上。皮革漆係一種具有類似皮革 ==之油漆。採用皮革漆之產品，具有特殊之 “ 良好之觸感’外觀效果非常引人注 防汗防滑之效果。 兑具有 層，】烤皮革漆通常係先喷塗基礎底漆 間具有==透明皮革漆面漆層。為了使各漆層之 定粗經度二二通常所用底漆、色漆之顆粒具有- 透過透明面漆層呈層或色漆層表面不平整，從而 受到影響，觀切、細叙效果就會 曰進而降低產品在市場上之競爭力。 7 200923133 【發明内容】 鑒於此，本發明提供—種 軟觸感效果之金屬外扭β —碎、有+滑、細膩及羊 及柔軟觸感層之方法。 ν成平滑、細膩 -種金屬外殼’其包括一基體 -電泳塗襄層，該電泳塗裝層上…f體表面形成有 漆層上形成有-面漆層；所述底漆層=層，該底 氣s旨漆。 " 面^層均含有聚 :種：屬外殼之製造方法，其包含如下步驟·· '金屬基體進行電泳塗裝，使苴 ' 塗裝層； /、表面形成一電泳 在該電泳塗裝層上喑+ & $ 述底、贺塗底漆，以形成-底漆屛.挤 述底漆層為透明聚氨酯漆層； ί所 在該底漆層上噴塗 漆層為透明聚氨酯漆層。成—面漆層；所述面 =習知技術相比’本發明金屬外殼採用 層塗裝方式，所述電泳塗::通 ===色漆層更平整、細腻;所 呈現之產品外觀更此透過透明底漆層、面漆層 具有柔賴之=二 面漆層為聚氨酿漆層’ 弓i力，使用效果更佳。 月金屬外设外硯更具吸 【實施方式】 晴參閱圖1，j： A太欲 ά 為本發明杈佳實施方式之金屬外殼 200923133 100之剖視圖。所述金屬外殼1〇〇包括一基體丄〇、一電 泳塗裝層20、一底漆層30及—面漆層二：述電二 裝層20形成於基體10上’所述底漆層％形成於電泳塗 裝層20上，所述面漆層40形成於底漆層3〇上。 所述基體10之材料為不銹鋼、鎂、=或其合金 屬材料。 " 所述電泳塗裝層20係由—電泳塗裝漆通過電泳塗 裝方式形成於基體1G上。所述電泳塗裝漆為丙_樹脂 與溶劑類组分之混合物’其中丙烯酸樹脂之重量百分含 量為50% ’溶劑類組分包含有13〜18%之異丙醇，3·5 〜5.5%之乙二醇或甲丁醇。電泳塗裝漆中可依產品顏色 需要添加相應顏料。所述丙烯酸樹脂漆顆粒細膩，相較 ’胃電泳塗裝層2Q更加細腻與平滑。 底漆層30由聚氨酯底漆噴塗於電泳塗裝層之上 而形成。所述聚氨i旨底漆由—底漆主劑與—底漆固化劑 混合組成。底漆主劑主要成膜組分為丙二醇甲醚醋酸酯 (或稱1-曱氧基-2-乙酿氧基丙烧），其在底漆主劑中之 重量百分含量》1〜5%。底漆主劑中還含有溶劑類紅 分’如75〜85%之甲苯，i〜5%之二甲苯及〇〜ι%之乙 笨。底漆主劑中還可添加其他溶劑類組分或添加劑。底 漆固化劑主要組分為多異氰酸酯，優選為聚工，&己二 異氰酸酯。所述多異氰酸酯占底漆固化劑之百分含量= 65〜75% ’在底漆成膜時起主要作用。底漆固化劑中還 含有其他溶劑類組分，如5〜15%之二曱笨，之乙 200923133 苯。底漆固化劑中還可含其他溶劑類組分或添加劑。 述底漆主劑、底漆固化劑之重量配比可為9〇〜: 3斤 7，優選重量比為1〇〇 : 5。所述底漆層3〇為透明聚&匕 漆層。 A虱酯 所述底漆中多異氰酸酯在底漆固化過程中可與所〜、 电冰塗裝漆中之丙烯酸樹脂發生一定之交聯反應，從^ 使底漆層30與電泳塗裝層2〇之間具有較強結合力^ , 所述面漆層40由聚氨酯面漆噴塗於底漆層30之 而形成。所述聚氨醋面漆由一面漆主劑、一面漆 及：面漆稀釋劑混合組成。其中面漆主劑中主要含乙二 ^六―甲本’乙苯及二月桂酸二丁錫等组分，面漆中 退可添加適量之光穩定劑’如受阻以 澤度。面漆固化劑主要包含多，之光 嶋為聚己二異氛酸醋^占二：：：酸 分含量為65〜75%，在八占面漆固化劑之百 ,^(f . .. ^ 在面漆成膜中起主要作用。面漆固 劑中㈣有其他溶劑類组分… = 醋，5〜15%之芳香溶劑’卜5% %之^义丁 〜1%之昱丙芙芏笙 4-一甲笨及0 含—:乙酸…組分’… 膜。所述面漆主劑、而涉存在，可促進面漆之成 比可為90〜:u〇 . 4固化劑及面漆稀釋劑之重量配 -〜Γ述〜45,優選重量比為· 所述底漆層3〇與面漆泰透明聚氨醋漆層。 /、 ’ θ 40令均含有多異氰酸酯， 10 200923133 …口化過耘中可相互發生交聯作用，使得色漆層 與面：層40之間具有較強結合力。 月 > 閱圖2，本發明所述金屬外殼之製造方法依下 述步驟進行。首jjr ，將基肪 1C)進行清潔前處理，以除去 1 y-w _L _ _ 土収、面之/亏物。使用除蠟清洗劑在除蠟槽中將基體 姊^犧3 6刀知，除蠟溫度7〇〇c〜8〇。〇。除蠟後將基 Γο二I溫下用純水清洗5秒鐘以上。清潔後將基體 & '合液，其濃度為60〜8〇g/L，電解時間40〜80 :大=解完畢後需進行兩道純水洗，每次水洗時間 句大於5㊉。陽極電解後再將基體iq進行陰極電解處 王’料陰極電解槽液與陽極電解槽 !為二:8。秒。陰極電解完畢後再進行兩道純==200923133 IX. Description of the Invention: [Technical Field] The present invention relates to a metal casing, and more particularly to a metal casing having a baking finish on a surface and a method of manufacturing the same. [Prior Art] With the improvement of the consumption level, the demand for electronic products not only pays attention to its quality, but also pays more and more attention to the appearance and feel of its appearance. 'Electronic products with special texture and soft touch. Competitive in the market. φ, the surface of the conventional electronic products is usually painted with various colors to achieve a colorful color effect. Although the color of the paint layer is rich, it does not have a soft and comfortable feel, and it is not very comfortable to use. : = = Leather lacquer is applied to mobile phones, keyboards and dream σ° appearances. Leather paint is a paint with a similar leather ==. The leather paint product has a special "good touch" appearance effect is very attractive anti-slip anti-slip effect. With the layer, the baked leather paint is usually sprayed first with the base primer == transparent leather paint Topcoat layer. In order to make the lacquer layer have a longitude and longitude, the primer and paint granules used usually have a transparent lacquer layer or the surface of the lacquer layer is uneven, which is affected. The effect will be 曰 曰 曰 。 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 a method of sensitizing layer. ν is smooth and delicate - a metal shell 'including a substrate-electrophoretic coating layer, the surface of the electrophoretic coating layer is formed with a lacquer layer formed on the lacquer layer; the bottom Paint layer = layer, the bottom gas s paint. " Surface layer contains poly: species: is a manufacturing method of the outer shell, which includes the following steps · · 'metal substrate for electrophoretic coating, so that 苴' coating layer; Forming an electrophoresis on the surface in the electrophoretic coating On the layer 喑+ & $ the bottom, the priming primer to form the primer 屛. The primer layer is a transparent polyurethane lacquer layer; ί is the lacquer layer on the primer layer as a transparent urethane lacquer layer. - topcoat layer; the surface = conventional technology compared to the 'metal casing of the invention using a layer coating method, the electrophoretic coating:: pass === color paint layer is more flat and fine; the appearance of the product is more Through the transparent primer layer and the topcoat layer, the two-sided paint layer is the polyurethane paint layer, which is more effective. The metal outer peripherals are more sucking [implementation] Figure 1, j: A is a cross-sectional view of a metal casing 200923133 100 of a preferred embodiment of the present invention. The metal casing 1 includes a substrate, an electrophoretic coating layer 20, a primer layer 30, and - Topcoat layer 2: The second electrical layer 20 is formed on the substrate 10. The primer layer is formed on the electrophoretic coating layer 20, and the topcoat layer 40 is formed on the primer layer 3. The material of the base 10 is stainless steel, magnesium, or a metal material thereof. " The electrophoretic coating layer 20 is coated by electrophoretic paint. The electrophoretic coating method is formed on the substrate 1G. The electrophoretic paint is a mixture of a resin and a solvent component, wherein the weight percentage of the acrylic resin is 50%, and the solvent component contains 13 to 18%. Isopropyl alcohol, 3. 5 ~ 5.5% of ethylene glycol or methyl butanol. In the electrophoretic paint, the corresponding pigment can be added according to the color of the product. The acrylic resin paint particles are finer than the 'gastric electrophoretic coating layer 2Q is more delicate and smooth. The primer layer 30 is formed by spraying a polyurethane primer on the electrophoretic coating layer. The polyurethane primer is composed of a primer primer and a primer curing agent. The main film-forming component of the paint main agent is propylene glycol methyl ether acetate (or 1-methoxy-2-phenyloxypropyl), and its weight percentage in the primer main agent is 1~5%. . The primer main agent also contains a solvent red component such as 75 to 85% toluene, i to 5% xylene, and 〇~ι% of B. Other solvent components or additives may also be added to the primer base. The main component of the primer curing agent is a polyisocyanate, preferably a polymer, & hexamethylene diisocyanate. The polyisocyanate accounts for a percentage of the primer curing agent = 65 to 75%. The main function is when the primer is formed into a film. The primer curing agent also contains other solvent components, such as 5 to 15% bismuth, and B 200923133 benzene. The primer curing agent may also contain other solvent components or additives. The weight ratio of the primer main agent and the primer curing agent may be 9〇~: 3 kg 7, and the preferred weight ratio is 1〇〇: 5. The primer layer 3 is a transparent poly & lacquer layer. The polyisocyanate in the primer of the A oxime ester can undergo a certain crosslinking reaction with the acrylic resin in the electric ice coating paint during the curing process of the primer, and the primer layer 30 and the electrophoretic coating layer 2 are There is a strong bonding force between the crucibles, and the topcoat layer 40 is formed by spraying a polyurethane topcoat on the primer layer 30. The polyurethane varnish is composed of a lacquer main agent, a lacquer and a topcoat diluent. Among them, the main paint of the top coat mainly contains components such as ethyl bromide, ethyl bromide and dibutyltin dilaurate, and the top coat can be retreated with an appropriate amount of light stabilizer, such as hindered. The topcoat curing agent mainly contains more, and the light 嶋 is polyhexamethylene acetoacetate ^2::: the acid content is 65~75%, in the eight-faced paint curing agent, ^(f . .. ^ It plays a major role in the topcoat film formation. (4) There are other solvent components in the topcoat solids... = vinegar, 5~15% aromatic solvent 'b 5%%^yi~1% 昱 芏 芏笙4-一甲笨和0 Contains::Acetic acid...component '... Membrane. The topcoat is the main agent, and it can be used to promote the topcoat ratio of 90~:u〇. 4 curing agent and noodles The weight of the lacquer thinner is -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In the mouth-forming enamel, cross-linking can occur in each other, so that the color lacquer layer and the face: layer 40 have strong bonding force. Month> Referring to Figure 2, the manufacturing method of the metal casing of the present invention is carried out according to the following steps. The first jjr, the base fat 1C) is pre-cleaned to remove 1 yw _L _ _ soil, face / loss. Use a wax removal cleaning agent to remove the substrate from the wax removal tank, and remove the wax at a temperature of 7〇〇c~8〇. Hey. After removing the wax, the substrate was washed with pure water for 5 seconds or more under the temperature of the base. After cleaning, the substrate & 'liquid mixture, the concentration is 60~8〇g / L, electrolysis time 40~80: large = two pure water washes are needed after the solution is completed, each time the washing time is greater than 50. After the anode is electrolyzed, the substrate iq is subjected to cathodic electrolysis. The cathode cathode electrolytic cell and the anode electrolytic cell are two: 8. second. After the cathode electrolysis is completed, two more pure ==
次水洗時間均大於5秒。兩次電解後在基體10之表面T 會留有殘餘之氫氧化鈉鹼液，因又上 酸（h2s〇4)中和處理。=、十=而對基體10再進行硫 7和處理。所述中和用硫酸 4〇g/L，中和日寺間50〜11〇秒。中和 ^為2〇〜 兩道純水洗後再進行超聲波純水洗。、土 - 10進行 ，工Γ二理後進人電泳槽内進行電泳塗 哀序以形成所述電泳塗裝層20。^ Μ χ 之電泳塗裝漆，其溫度為23〜2rc。；::内… 述電泳塗裝漆内上下晃動二次倕 、土 _ 10放入所 无動一-人以使基體1〇鱼 漆充分接觸與浸潤，之後上掛於導電樺；、斤述塗裝 裝。電泳塗裝操作電壓為5〇〜9〇乂之^…、進行電泳塗 曰1，塗裝時間為5〇 11 200923133 〜100秒。電泳塗裝層20之厚度為8〜12#m。電泳塗 裝後將基體10進行超濾水洗。 超濾水洗後將基體10再進行喷淋水洗及三道純水 洗。所述嘴牀時間為10〜40秒’每道水洗時間為大於5 秒。水洗後將基體10進行甩水及加熱烘乾處理，所述烘 烤溫度為150〜1701： ’烘烤時間10〜20分鐘。 基體10在烘乾之後進入噴漆房進行底漆層3〇之喷 塗。喷漆房溫度為18〇C〜28t ,濕度為40〜80%RH。 喷塗底漆層30噴搶中油漆之壓力為〇〇4〜〇〇6Mpa，油 漆噴出後霧化，其霧化壓力為〇1〜〇16Mpa，油漆喷出 幅度大小以喷幅壓力管控，底漆喷幅壓力為〇.〇8〜 〇.14Mpa。底漆層30厚度為介於〜之間。喷塗 兀成後基體10進入流平室流平，流平後進行加熱烘乾固 化，固化溫度可在7(rc〜1〇(rc之間，優選為75〇c〜85 °c之間。 底漆層30固化後經冷卻基體再進入喷漆房進行 面漆層40之噴塗’喷塗面漆層4〇喷漆房溫度為18t〜 28 C ’濕度為40〜80%RH。喷塗面漆層40喷搶中油漆 之壓力為0.02〜〇.〇4Mpa’油漆喷出後霧化壓力為〇〇7 〇-13Mpa’喷幅壓力為〇.〇6〜〇,i2Mpa。面漆層40厚 度為介於40〜60仁m之間。噴塗完成後基體1〇進入流 平至流平’流平後進行加熱烘乾固化，固化溫度可在25 〜65 C之間，優選為35〜55。〇之間。面漆層固化後再進 行烤漆處理，烤漆溫度為70〜l〇5°C之間，優選為80〜 12 200923133 95°C之間。 對以上述方法形成之漆膜進行了性能測試，測試結 果及條件見表1，測試方法如下： 。冷熱衝擊測試：首先將本發明金屬外殼100置於_40 C測试至内保持45分鐘，然後立即轉移到85。。測試室 内再保持45刀知。在40小時内重複此步驟27次，重複 完成後立即檢查該金屬外殼1〇〇。 高溫高濕測試：將兩組本發明金屬外殼1〇〇置於恒 、溫恒濕箱内，其中一組塗Sunun油另外一組不塗 Suntan >由。在溫度阶，相對濕纟鳩之條件下放置 48小時，然後取出該兩組金屬外殼⑽，冷卻至室溫， 檢查其外觀有無明顯變化。 附著力測試··選擇本發明金屬夕卜殼1〇〇上一益污毕 和無次要表面缺陷之區域，放在堅硬之基座上，在照明 顯微鏡下面，使用签夺丨丨々” u丄u 便用鋒利之刀片在其表面上劃間隔為2mm % 丄線長度為20mm。剪取75mm 、夕π黏在所劃切割線區域上並完全覆蓋所述區域，用 手指將膠帶壓平整’計時3g_9g秒，然、後抓住膠帶之一 ^丄8。。之角度迅速撕開膠帶。使用放大鏡檢查切割 線區域漆膜與基材或前—漆膜剝離之情況。 =硬度測试：將錯筆芯與金屬外殼⑽漆膜成衫 °⑴a動’切割或刮割漆膜’劃痕長度為6.5mm。逐 步降低錯筆之硬产售· 3备p、+、止The time of each wash is greater than 5 seconds. After the two electrolysis, residual sodium hydroxide lye remains on the surface T of the substrate 10, and is neutralized by acid (h2s 〇 4). =, ten = and the substrate 10 is further subjected to sulfur 7 and treatment. The neutralization is carried out with 4 〇g/L of sulfuric acid, and between 50 and 11 sec. Neutralization ^ is 2 〇 ~ two pure water washes and then ultrasonic pure water wash. And the soil - 10 is carried out, and the electrophoresis coating is performed in the electrophoresis tank to form the electrophoretic coating layer 20. ^ Μ χ Electrophoretic paint, the temperature is 23~2rc. ;::内... The electrophoretic coating paint shakes up and down twice, soil _ 10 puts in the movement without a movement - the person makes the base 1 squid paint fully contact and infiltrate, and then hangs on the conductive birch; Painting equipment. The electrophoretic coating operation voltage is 5 〇 to 9 ^ ^, and the electrophoretic coating 曰 1 is applied, and the coating time is 5 〇 11 200923133 〜 100 seconds. The thickness of the electrophoretic coating layer 20 is 8 to 12 #m. After the electrophoretic coating, the substrate 10 was subjected to ultrafiltration washing. After the ultrafiltration was washed, the substrate 10 was again sprayed with water and washed with three pure waters. The mouth bed time is 10 to 40 seconds' each wash time is greater than 5 seconds. After washing with water, the substrate 10 is subjected to hydrophobicization and heat drying, and the baking temperature is 150 to 1701: 'bake time 10 to 20 minutes. After drying, the substrate 10 enters the spray booth and is sprayed with a primer layer. The temperature of the spray booth is 18〇C~28t and the humidity is 40~80%RH. Spraying the primer layer 30 to spray the paint in the pressure of 〇〇4~〇〇6Mpa, the spray is sprayed and atomized, the atomization pressure is 〇1~〇16Mpa, the spray spray amplitude is controlled by the spray pressure, and the bottom is controlled. The paint spray pressure is 〇.〇8~ 〇.14Mpa. The primer layer 30 has a thickness between ~. After spraying, the substrate 10 enters the leveling chamber and is leveled, and then dried and solidified by heating, and the curing temperature can be between 7 (rc~1〇(rc, preferably 75〇c~85 °c). After the primer layer 30 is solidified, it is cooled into the spray booth and then sprayed into the spray booth 40 to spray the topcoat layer 40. The spray paint booth temperature is 18t~28 C 'humidity is 40~80% RH. Spray paint layer The pressure of the paint in 40 spray is 0.02~〇.〇4Mpa' The spray pressure after the spray is 〇〇7 〇-13Mpa' The spray pressure is 〇.〇6~〇, i2Mpa. The thickness of the topcoat layer 40 is Between 40 and 60 ren. After the spraying is completed, the substrate 1 〇 enters the leveling until the leveling is leveled, and then dried and solidified. The curing temperature can be between 25 and 65 C, preferably 35 to 55. After the topcoat layer is cured, it is then subjected to baking treatment, and the baking temperature is between 70~1〇5°C, preferably between 80~12 200923133 95°C. The performance test of the paint film formed by the above method is performed. The test results and conditions are shown in Table 1. The test methods are as follows: Thermal shock test: First, the metal casing 100 of the present invention is placed in the _40 C test for 45 minutes. Then immediately transfer to 85. The test chamber is kept at 45 knives. Repeat this step 27 times in 40 hours, and check the metal casing 1 立即 immediately after the completion of the completion. High temperature and high humidity test: two sets of metal casings of the invention 1〇〇 placed in a constant temperature and humidity chamber, one set of Sunun oil is coated with Suntan > is placed in a temperature step, placed under conditions of wetness for 48 hours, and then the two sets of metal are taken out. The outer casing (10), cooled to room temperature, and checked for obvious changes in its appearance. Adhesion Test··Select the metal enamel shell of the present invention and place it on the hard base. Above, under the illumination microscope, use the sign 丨丨々" u丄u to use a sharp blade to divide the surface by 2mm %. The length of the 丄 line is 20mm. Cut 75mm, 夕 π stick to the cut line area Upper and completely cover the area, use your fingers to flatten the tape 'time 3g_9g seconds, then grab one of the tapes ^ 丄 8. The angle quickly tears off the tape. Use a magnifying glass to check the cutting line area paint film and substrate Or before - paint film peeling Situation. = Hardness test: the wrong pen core and the metal casing (10) paint film into a shirt ° (1) a moving 'cutting or scraping paint film' scratch length is 6.5mm. Gradually reduce the wrong production of the wrong pen · 3 spare p, +, stop
又 灵上逑步驟’直到找到特定硬产金L 筆在測試中不能刺穿选 又’口 此刺牙漆膜達至基材或下一層漆膜，此硬 13 200923133 度即為漆膜之鉛筆硬度。 座上耐in ·將本發明金屬外殼100穩固於儀器基 試面與儀器測試控製桿正交。將-砂紙帶 二η以面' 並用墊片壓緊’打開動力馬達開關開 :式。母一測試後檢查該金屬外殼漆膜有無失效現象 么生，若無則繼續進行試驗。 耐丁酉同測試：於室溫及相對溫度50%之條件下，用 丁酮4劑分別滴在本發明金屬外殼則表面上之三個不 同區域暴路於空氣中。追加試劑使所述三個區域在丁 嗣作用下保持2分鐘（應防止丁酮接觸該金屬外殼1〇〇 上漆膜較薄之邊緣）。2分鐘後，立即擦幹或吹幹所述滴 丁酮試劑區域，立即檢查產品表面顏色和光澤有無明顯 變化。 睛參閱表1所示，各項測試結果表明本發明金屬外 "又表面漆膜硬度高、耐磨耗、附著力強、耐候性好。 表 測試項目 —---- 測試結果 測試條件 漆膜外觀 — — 漆膜平整、細腻 目測’手感 耐冷熱衝擊性 漆膜無開裂、起泡、 -40X：〜85〇C， •~~ -- 脫落 27cycles 漆膜無開裂、起泡 脫落 65〇C，90%RH，48Hr (兩組樣品分 別塗Suntan油 14 200923133 及不塗Suntan 油） 耐Suntan油性 漆膜無開裂、起泡 起皮 65〇C，90%RH，48Hr 附著力（兩組 樣品财Suntan 油測試前及耐 Suntan油湏丨J試 後）In addition, the spirit of the steps 'until to find a specific hard gold L pen can not be pierced in the test and choose 'the mouth of the toothpaste film to reach the substrate or the next layer of paint film, this hard 13 200923133 degrees is the pencil of the film hardness. The seat is resistant to in. The metal casing 100 of the present invention is stabilized on the instrument base test surface and orthogonal to the instrument test control rod. Put the sandpaper tape ηη with the face 'and press it with the gasket' to turn on the power motor switch. After the mother test, check whether the metal casing paint film has failure or not. If not, continue the test. The same test was carried out: in the case of room temperature and relative temperature of 50%, four different doses of the butanone 4 were dropped on the surface of the metal casing of the present invention. Additional reagents were used to maintain the three zones for 2 minutes under the action of butyl hydrazine (the butanone should be prevented from contacting the thinner edge of the metal casing 1 上 paint film). Immediately after 2 minutes, the area of the butanone reagent was wiped dry or blown, and the surface color and gloss of the product were immediately checked for significant changes. See the results in Table 1. The test results show that the metal film of the present invention has high hardness, wear resistance, strong adhesion and good weather resistance. Table test items ----- Test results Test conditions Paint film appearance - Paint film flat, delicate visual inspection 'Hand feel resistant to cold and heat impact paint film without cracking, foaming, -40X: ~85〇C, •~~ - - Shedding 27cycles No cracking, blistering off 65〇C, 90%RH, 48Hr (Sunan oil 14 200923133 and Suntan oil are not applied to the two groups) Suntan oily paint film is crack-free, foaming and peeling 65〇 C, 90% RH, 48Hr adhesion (two groups of samples before the Suntan oil test and after the Suntan oil 湏丨 J test)
5B 百格刀劃格法 鉛筆硬度（兩 組樣品耐 Suntan油測試 前及财Suntan 油測試後） 50〇g载荷，45°測試 角度 耐磨耗性（兩 組樣品耐 Suntan油測試 前及财Suntan 油測試後） 漆膜無變化 17 5 g載荷，$50cycles 耐丁嗣性 表面無變化 純丁酮滴試，室溫， 相對濕度50% 注··每項檢驗均抽取5個樣品進行測試 15 200923133 .【圖式簡單說明】 圖1係本發明較佳實施方式之金屬外殼之剖視 圖2係本發明較佳實施方式之金屬外殼製造 程圖。 【主要元件符號說明】 金屬外殼 100 基體 10 電泳塗裝層 20 底漆層 30 面漆層 40 165B 100 grid knife method pencil hardness (two groups of samples resistant to Suntan oil test and after the Suntan oil test) 50 〇 g load, 45 ° test angle wear resistance (two groups of samples resistant to Suntan oil test and Cai Suntan After the oil test) No change in the paint film 17 5 g load, $50cycles No change in the surface of the butadiene resistant pure butanone drop test, room temperature, relative humidity 50% Note · 5 samples are taken for each test for testing 15 200923133 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view 2 of a metal casing according to a preferred embodiment of the present invention, showing a manufacturing process of a metal casing according to a preferred embodiment of the present invention. [Main component symbol description] Metal case 100 Base 10 Electrophoretic coating layer 20 Primer layer 30 Finish layer 40 16