不干膠的動作原理(參考版)
2025-02-16 00:23本頁面
【正文】 Peel 演講完畢，謝謝觀看！ 。不乾膠的定義 Definition of PSA ? 擁有持久的高黏度 Aggressively and permanently tacky ? 應(yīng)用時(shí)只需用手或手指施壓 Adheres with finger or hand pressure ? 不需水 , 溶劑或加熱過程 Requires no activation by water, solvent or heat ? 有牢靠的粘黏力 Exerts a strong holding force ? 有足夠的內(nèi)聚力和彈性 Has sufficient cohesiveness and elasticity Pressure Sensitive Tape Council 不干膠的好處 Advantages of PSA抯 ? 不須涂布，混合等預(yù)處理步驟 Ready to use, no mixing or brushing is required ? 一貫性的膠量 Consistent amount of adhesive ? 使用上方便，快捷 Less messy than super glue and contact cement ? 可以模切成各種形狀 Can be die cut into specific shapes ? 持久的黏彈性可以避免脆化，斷裂等現(xiàn)象 Stays viscoelastic which eliminates brittle fracture possible with epoxies, hot melts and cyanoacrylates ? 無臭，無味和溶劑 Less odor during use 粘黏力和內(nèi)聚力 Adhesion and Cohesion 內(nèi)聚力 Cohesion 材料自身的力量 Internal strength of material Adhesive Substrate Substrate Adhesive Substrate Substrate 粘黏力 Adhesion 存在兩種表面之間的力量 Force between dissimilar surfaces 黏性與剪力 Viscosity and Shear Strength ? 低黏性材料 Low Viscous Materials (. Water 水 ) – 高流動性 Flow easily – 不須施加壓力 Do not need rub down pressure – 無剪力 No shear strength ? 高黏性材料 Higher Viscous Materials (. Oil, Honey 油 , 蜂蜜 ) – 只需少許壓力便可以流動 Require moderate pressure to flow – 低剪力 Little shear strength – 無法持久承受荷重 Fail under continuous shear load 黏性與剪力 Viscosity and Shear Strength ? 黏彈性材料 Viscoelastic Materials (. Pressure Sensitive Adhesive 不乾膠 ) – 使用時(shí)須施加壓力 Require considerable rubdown pressure – 需駐留時(shí)間發(fā)揮效能 Require dwell time – 有優(yōu)良的剪力 Well balanced shear properties ? 非黏性材料 Nonviscous Materials (. cured adhesives 作用后的粘黏劑 ) – 無流動性 No flow characteristics – 無黏性 Not sticky – 有極高的剪力 Maximum shear strength 黏性和黏彈性 Viscosity and Viscoelasticity 粘
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