The adhesive performances of a PSA (Pressure Sensitive Adhesive) are attributed to their viscoelastic properties. In this paper we analyze the viscoelastic behavior of different PSAs having substantially similar adhesive performance. Linear and non linear analyses were performed using small amplitude oscillatory shear tests and tensile stress-strain tests, respectively. It is shown that linear ...

Hot-melt pressure-sensitive adhesive (HMPSA) is an environmentally benign which typically processed without solvent in industries. However, casting solution method commonly used for experimental purposes the lab convenience. Therefore, seven types of with different polarities, including toluene as most solvent, were investigated this work to study feasibilities. Quick bond strength and holding ...

Suction based attachment systems for pick and place handling of fragile objects like glass plates or optical lenses are energy-consuming and noisy and fail at reduced air pressure, which is essential, e.g., in chemical and physical vapor deposition processes. Recently, an alternative approach toward reversible adhesion of sensitive objects based on bioinspired dry adhesive structures has emerge...

Transdermal patches are a popular route for drug delivery because of the sustained drug levels, low side effects, reduced hepatitic first-pass effect and ease of use, including self– administration. The basic components of any transdermal delivery system include one or more active pharmaceutical ingredient s (APIs) dissolved or dispersed in a reservoir or inert polymer matrix; an outer backing ...

Silicone pressure-sensitive adhesives compositions contain a polydimethylsiloxane and a silicone resin, which can enhance the instant bonding ability and bonding strength of the adhesive. In this study, silicone resin was designed to have a low molecular weight and a highly nonpolar chemical structure. The silicone resin was applied to silicone pressure-sensitive adhesives. The molecular struct...

The transmission of high-frequency shear stress through a microscopic contact between an AFM tip and an oscillating quartz plate was measured as a function of vertical pressure, amplitude, and surface properties by monitoring the MHz component of the tip's deflection. For dry surfaces, the transmission of shear stress is proportional to the vertical load across the contact. This provides a meas...