For liquids such as water, viscosity can be perceived as a measure of the liquid’s resistance to flow. Viscosity is a measure of the resistance of a fluid to deformation at a given rate. JavaScript is currently disabled.Please enable it for a better experience of Jumi. Viscosity has the SI units Pascal seconds (Pa s) which is called the Poiseuille. The viscosity of water at a temperature of 20 degrees Celsius is approximately 0.01 poise or 10 -3 Pa.s (Pascal seconds). Viscosity is given in centiPoise (cP), equivalent to milliPascal seconds (mPa s). There is no direct connection between the adhesive base and the flow behaviour when heated. The dynamic viscosity is expressed in mPas or micro-Pascal seconds.1 Pas corresponds to 1 Ns/m. Table of Viscosities A compiled list of viscosities of various materials. Hot-melt adhesives have values between 100 mPas and over 15.000 mPas and are selected for the corresponding application. Here are some examples of viscosity values: In general, every substance – including solids – has a viscosity, but this is so high that flow behaviour is usually not recognisable.Ī typical example is glass, which, given the right load and time, can also be penetrated by another solid without being damaged. From principles of surface tension-driven coalescence, the team concluded that the medium surrounding the nucleoli an viscosity of around 3000 pascal-seconds. For this reason, viscosity is specified at a certain processing temperature. The following applies to hot-melt adhesives: The higher the melting temperature, the thinner/ lower the viscosity and vice-versa. The higher the viscosity, the more viscous the substance. The dynamic viscosity is expressed in mPas or micro-Pascal seconds.1 Pa*s corresponds to 1 Ns/m². The particles of high-viscosity fluids are more strongly bound together, making them less mobile than the particles of low-viscosity liquids. However, this is not usually used as a measure for evaluating adhesives. The unit of dynamic viscosity is Pascal-second (Pas), and it is usually. The opposite of viscosity is what is known as fluidity. For example, honey has a higher viscosity than water because it flows more. The plant genus mistletoe has the scientific name “ Viscum”. Viscosity Scale Glycerin or Motor Oil (SAE 60), 1,000 - 2,000, centipoise (cps) Pourable Urethane Rubbers, 1,000 - 3,000, centipoise (cps) Honey or Corn. The term viscosity is derived from bird glue, which used to be made from mistletoe. Viscosity means the fluidity of a substance.

Viscosity of honey in pascal seconds