Peneto Analyzer PNT-N
The Peneto Analyzer PNT-N is the instrument to evaluate the affinity between powder and liquid, i.e. , wettability, by measuring the speed and mass of the liquid penetrating into the powder bed.
Principle of Operation
A common measuring method of wettability of powder with liquid is to measure the contact angle by the microscope. However, the preparation of the powder sample such as tableting and polishing method does not represent the powder properties and the surface roughness greatly affects the result. On the other hand, the Peneto Analyzer measures the penetration mass of liquid into the powder bed by capillary action. The penetration speed into the powder bed is fast, if it has high affinity. Washburn’s equation shows the relationship between the penetrated height and contact angle with the assumption that the powder bed forms the uniform capillaries. The result of the term of penetrated height can be replaced by the penetrated mass as Equation 1. The Peneto Analyzer can indicate the contact angle by the following equation for measuring the mass of liquid penetration.
Washburn’s equation;
Where, WL: mass of liquid penetration, t: time, S: cross section area of the cell, ε: void ratio, ρL: Liquid density, γ: Radius of capillary formed in powder bed, γL: surface tension of liquid, ηL: Viscosity of liquid, θ: contact angle between liquid and solid surface.
The unit consists of a weighing balance, a measuring cell, a liquid vessel and a lifting device. The measuring cell is hung to electrically connec to the electric balance. The vessel is set to contact the powder bed and liquid. The Peneto Analyzer starts lifting the cell and records the mass in real time.
Features
No special pretreatment
Pretreatment is only tapping the powder bed. Simple measurement to hang the cell on the balance. No need to conduct any molding or firing which is different from the common contact angle measuring method. PNT-N can measure the material in the forms of powder, sheet or block.
Accurate and reproducible measurement
A controlled lifting device accurately decides the lifting level and realizes the highly accurate lifting motion conductive to accurate measurement.
Tapping conditions affect pore distribution in the powder bed and the measurement reproducibility. We provide a dedicated tapping unit. This unit controls the tapping stroke and number of tapping with high-accuracy. The stable tapped condition improves the reproducibility of measurement.
Easy operation
Operation is easy with the control software for Windows 7. The control software can display in different windows during the measurement.
(Windows is a registered trademark of Microsoft Corporation in the United States and other countries.)
The acrylic cover of the unit opens up and down, making it easy to access the working area.
Applicable sample and liquid (solvent)
Sample : Powder, Porus block, Fibers, Sheet-like material and powder coated foils,
Liquid (Solvent) : Water or organic solvent with high flowability such as linseed oil.
experimental verification
Before investing in new equipment, please conduct tests on the materials to be used at the Hosokawa Testing and Process Development Center based on actual production conditions. Our experienced experts will assist you in determining the most effective mixing, granulation, or drying processes, helping you transition from laboratory testing to a comprehensive production testing phase. Whether you need to test the performance of a single machine or evaluate the entire production line, we can provide tailored testing services and process optimization solutions to ensure reliable system operation and excellent performance.
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