不干膠的動作原理ppt31)-經(jīng)營管理-wenkub
2022-08-26 21:23:06 本頁面
【正文】 3330 90 degree, 72 hour room temp dwell * Typical values not for specification purposes Adhesive Stainless ABS Polypropylene (2 mil) Steel 100 92 73 13 200MP 103 57 22 350 63 61 39 300LSE 73 72 70 300 72 83 52 Adhesive Peel Performance 粘接不牢的各種因素 What Causes Bond Failure? ? 不乾膠與背材的相互作用 AdhesiveSubstrate Inpatibilty ? 表面結(jié)構(gòu) Textured Surface ? 表面污染 Surface Contamination – 離型劑 Mold Release, 塵埃 Dust Particles ? 增塑劑的遷移 Plasticiser Migration – 軟質(zhì)聚氯乙烯 Flexible PVC, 橡膠 Rubber ? 殘留水份 Outgassing of Moisture – 聚碳 Polycarbonate 表面污染 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 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 stren
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