Bulk Density Test for Blended PVC Compound

Introduction

Bulk Density is one of the easiest measured and most practical physical properties of PVC resins and compounds. Therefore, temperature of polymerization, and the thermal history of the PVC affects the density. After Dry Blending process, blended compound must test for Bulk Density. If this test doesn't pass, it will be reason to many defects.

Instruments

• Bulk Density Measuring apparatus
• Sample of Blended Compound
• Measuring Flask
• Scale ( Min. 0.1g)

Bulk Density Measuring apparatus

Procedure

1. Measure 120 ml of Blended Compound sample in to measuring flask. Make sure it doesn't contain air gaps.
2. Add Measured sample in to the funnel of Bulk Density Measuring Apparatus. Make sure valve of funnel closed.
3. Measure the weight of empty cup.  (M1)
4. Setup empty cup with  Bulk Density Measuring Apparatus. Make sure is it center with funnel outlet.
5. Open the valve to free flow the PVC compound.
6. After completely flow, remove extra compound using flat plate ( C ) smoothly. Don't touch or hit the cup before removing extra compound.
7. After that clean the surface of cup and get it's weight.  (M2)
8. Then calculate Bulk Density using the formula given below.

 V = 100ml

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