Determination of Paraffin Penetration
Overview
Paraffin is a hydrocarbon mixture extracted from certain distillates of petroleum, shale oil or other bituminous mineral oils. Its main component is solid alkane. It is odorless, tasteless, and appears as a white or pale yellow translucent solid. With excellent sealing, insulating and lubricating properties, it is widely used in food packaging, cosmetics, pharmaceuticals, candle manufacturing, industrial lubrication and other fields.
Purpose of the Experiment
The penetration value of paraffin can determine its hardness, viscosity and service performance (the higher the penetration value, the softer the paraffin and the stronger its fluidity), providing a key basis for production quality control and application selection of paraffin. This experiment is carried out in accordance with GB/T4985 Determination Method of Paraffin Penetration. The SH017A Automatic Paraffin Penetration Tester is designed and manufactured in compliance with this standard, enabling accurate and efficient testing.
Experiment Procedure
Experimental Samples and Instruments
Experimental Samples: Paraffin samples to be tested
Experimental Instruments:
1.SH017A Automatic Paraffin Penetration Tester
2.Auxiliary tools including sample cups and cleaning reagents
Operating Steps
1.Carefully fill the sample cup with the paraffin sample to about 2mm above the cup rim. Vibrate the sample cup on a flat table for 5 minutes to remove air bubbles, and then scrape the surface of the sample flat.
2.Place the sample cup on the bracket in the water bath of the instrument, set the constant temperature at 25℃±0.5℃, and let it stand at constant temperature for 24 hours.
3.Click the touch screen of the instrument to log in to the operation interface, and adjust the tip of the needle to just contact the sample surface through the fast lifting and fine-tuning functions.
4.Enter the parameter setting interface, input information such as sample name and sample number, and preset the number of tests.
5.Click "Start Test". The instrument automatically completes the penetration test via the high-precision displacement sensor. After the test, it automatically calculates the average value, standard deviation and coefficient of variation, and supports automatic result printing.
6.If continuous testing is required, you can directly click "Continue Test" for the next group of experiments without turning off the instrument.
Data Analysis and Result Evaluation
Tested by the SH017A Automatic Paraffin Penetration Tester, the penetration value of the paraffin sample is within the instrument's measurement range of 0～700 penetration units, and the measurement accuracy is controlled within ±1 penetration unit, complying with the requirements of GB/T4985 standard. The experimental results are exported to a USB flash drive in CSV or Excel format for archiving. The data shows that the sample has stable penetration and the coefficient of variation is lower than the allowable range. It can be determined that the paraffin sample meets the standards for texture uniformity and service performance.