不干膠的動(dòng)作原理ppt31)-經(jīng)營管理-資料下載頁
2025-08-06 21:23本頁面
【導(dǎo)讀】擁有持久的高黏度。應(yīng)用時(shí)只需用手或手指施壓。不需水,溶劑或加熱過程。有足夠的內(nèi)聚力和彈性。不須涂布，混合等預(yù)處理步驟。使用上方便，快捷?？梢阅Ｇ谐筛鞣N形狀。持久的黏彈性可以避免脆化，斷裂等現(xiàn)象。無臭，無味和溶劑Lessodorduringuse. –只需少許壓力便可以流動(dòng)。–無法持久承受荷重。–使用時(shí)須施加壓力。–需駐留時(shí)間發(fā)揮效能。不乾膠具有流動(dòng)性,能與背材緊密接合。初期與最終粘黏力。軟性與韌性的不乾膠。如何取得最大的接觸面積。–膠需要時(shí)間流動(dòng)Foradhesivetoflow. –高溫可以減低膠的黏性Decrease. –避免汽泡的產(chǎn)生。表面結(jié)構(gòu)與不乾膠的厚薄度
【正文】 面污染 Surface Contamination ? 油脂 , 指紋 , 水 , 油 和注塑用的離型劑 Grease, Finger Print, Moisture, Oil, Mold Release Chemicals – 防止膠與背材接合 Create a barrier bewteen adhesive and substrate ? 塵埃 , 石粉 , 纖維持等 Dust, Talc, Fiber, Particle Contamination – 影響膠的黏性 Affects tackiness of adhesive – 減少有效的接觸面積 Reduce contact surface area 剝離力與剪力的測試 Peel vs Shear Test 剝離力 Peel 衡量 measures 粘黏力 Adhesion 剪力 Shear 衡量 measures 內(nèi)聚力 Cohesion 剪 力 Shear Strength ? Shear measures Cohesion the internal strength of adhesive ? Typically – Soft Adhesive Low Shear – Firm Adhesive High Shear – Thick Adhesive Low Shear – Thin Adhsive High Shear 靜 態(tài) 剪 力 Static Shear Strength ? Time Required to shear a defined area of tape from a test panel at constant load ? Variables – Load – Test Panel Material and Surface Conditions – Temperature Load Tape Test Panel 動(dòng) 態(tài) 剪 力 Dynamic Shear Strength ? Force Required to shear a standard area of tape from a test panel at constant speed ? Variable – Speed – Test Panel Material and Surface Conditions – Temperature 剝離力 Peel Strength ? Peel measures Adhesion the bonding strength of adhesive ? Typically – Soft Adhesive High Peel – Firm Adhesive Low Peel – Thick Adhesive High Peel – Thin Adhsive Low Peel 靜 態(tài) 剝 離 強(qiáng) 度 Static Peel Adhesion ? Time Required to peel a defined length of tape from a test panel at specific angle at constant load ? Variables – Load – Test Panel Material and Surface Conditions – Temperature 動(dòng) 態(tài) 剝 離 強(qiáng) 度 Dynamic Peel Adhesion ? Force required to peel standard area of tape from a test panel at specific angle and constant speed ? Variable – Speed – Test Panel Material and Surface Conditions – Temperature 180 176。 Peel 90176。 Peel
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