We propose an analytical model to predict the adhesives penetration into hard wood. Penetration of hard wood is dominated by the vessel network which prohibits porous medium approximations. Our model considers two scales: a one dimensional capillary fluid transport of a hardening adhesive through a single, straight vessel with diffusion of solvent through its walls and a mesoscopic scale based ...

The purpose of this study was to evaluate the influence of environmental temperature, humidity and methods to dry the etched enamel surface on the adhesive strength of dental adhesive resin Panavia EX '. The findings were as follows 1. Though temperature and humidity in oral cavity were higher than 30•Ž and 81% respectively, they were significantly different from site to site. 2. By rubber dam ...

The utilization of Attenuated Total Reflectance – Fourier Transform Infrared (ATR-FTIR) spectroscopy for the characterization of pressure sensitive products is well established. Some recent advances in sensor technology have opened new application areas of ATR-FTIR spectrometry. One of them is monitoring of chemical reactions, which are of interest for pressure sensitive adhesive production. In...

ber af problems fer nnr instantaneously While solvent-assisted emulsion systems have met with a degree of success in formulating pressure sensitive adhesives, they have several disadvantages. The solvent content of these systems precludes totally solvent-free adhesives. Also. there is reported evidence that surfactants used to stabilize the emulsion can adversely affect tack properties of the f...

introduced in 1991 to save the clinician the time spent in preparing the adhesive for direct bonding and applying it to the bracket.1 The APC brackets, which are packaged in individual capsules for ease of identification and infection control, are applied with finger pressure.2 A uniform factory precoating purportedly ensures an even amount and consistency of composite beneath each bracket. Any...