Liquidity Tester

This article explores how a gravure proofing press can be used to comprehensively evaluate the printability and drying properties of gravure inks. The experiment tested the dot sharpness, transfer rate, and leveling properties of different inks using standard equipment, while recording drying times through the filter paper method and infrared temperature measurement.

This article explores how to assess and regulate the stability of polypropylene's flowability in injection molding processes by measuring its melt flow rate. It explains the principles behind characterizing flowability and analyzes the impact of factors such as material batch variations and process parameters on stability.

This article introduces how a melt flow indexer measures the processing fluidity of high-temperature engineering plastics. It first explains the working principle of the instrument, which involves measuring the rate at which molten plastic passes through a standard die under specific temperature and pressure conditions to obtain the melt flow rate value.

A melt flow indexer evaluates the melt flow rate of plastics by measuring the extrusion mass or volume under specific temperature and load conditions.

The rotational viscometer measures torque via rotor rotation, making it suitable for testing the static or low-shear fluidity of resins under low shear rates, with simple and quick operation. The capillary rheometer, on the other hand, forces samples through a capillary to simulate high-shear processing, providing flow data closer to actual production conditions, but it is more complex and time-consuming to operate.

A melt flow indexer is a device used to measure the flowability of thermoplastic resins. It calculates the melt flow rate by determining the mass or volume of the melt that passes through a standard die within 10 minutes under specific temperature and pressure conditions.

This article introduces how a Hall flowmeter measures the flowability of spray powder. It uses a standard funnel to measure the time required for a certain mass of powder to flow out under gravity—the shorter the time, the better the flowability.

This article analyzes the actual coating thickness deviation of stainless steel wire rod coaters under different slurry solid contents. The study finds that the solid content of the slurry affects its viscosity and flowability, leading to deviations in the actual coating thickness from the theoretical value.

This article primarily discusses how to balance the two key properties of sag resistance and leveling during the application of materials such as coatings and adhesives. Sag resistance refers to the material's ability to resist sagging due to gravity on vertical surfaces, while leveling refers to the material's ability to automatically smooth out its surface after application.

This article mainly discusses that high-viscosity ceramic slurries are prone to issues such as streaks and uneven thickness during coating, which is attributed to the variation of slurry viscosity with shear forces, leading to poor fluidity.

A melt flow indexer is a device used to test the flowability of thermoplastic plastics. It measures the mass or volume of plastic extruded from a standard die per unit time under specific temperature and pressure conditions to determine the melt flow rate.

This article discusses how a bulk density tester is used to evaluate the flowability of powders. Powder flowability is crucial in production. The instrument measures the bulk density and tapped density, then calculates the compressibility index and Hausner ratio. These two parameters directly reflect the quality of powder flow.

Purification workbenches primarily employ two types of air supply methods: horizontal and vertical. In horizontal air supply, the airflow is parallel to the work surface, while in vertical air supply, the airflow moves from top to bottom, forming a laminar barrier. The selection should be based on a comprehensive consideration of experimental needs, sample characteristics, and safety requirements.

When testing the flowability of plastics with a melt flow indexer, temperature control is crucial. There are three key temperature parameters: first, the barrel set temperature; second, the uniformity of temperature distribution; and third, the stability of temperature control.

This article introduces a method for comprehensively evaluating powder flowability in powder engineering by combining the use of an apparent density tester and an angle of repose tester. Apparent density reflects the packing characteristics of the powder, while the angle of repose indicates its ease of flow.