Use apparent bulk density, not the solid polymer’s density, for a first estimate of PVC powder mass in a hopper. The result is still an estimate until the actual fill, flow and equipment limits are checked.
Read which density was measured
The SCGC SG500 sheet reports apparent bulk density using ISO 60. It is a typical value for that grade, not an ENVO guarantee. Request the offered resin’s actual bulk-density method and range before calculating storage or dosing capacity.
A hypothetical hopper has 2.0 m³ usable powder volume. At 550 kg/m³ apparent bulk density, the estimated powder mass is 1,100 kg; at 500 kg/m³ it is 1,000 kg. The change is 100 kg within those assumptions. These are invented values, not design capacities or instructions to exceed an equipment rating.
| Input | Keep explicit |
|---|---|
| Density | Apparent bulk method and sample condition |
| Volume | Usable powder space, excluding required headroom |
| Equipment limit | Approved mass and operating constraints |
| Operating result | Actual fill, discharge and feeder performance |
Do not infer flow from density alone
Two powders with similar apparent bulk density can behave differently during discharge. Record bridging, refill response and feed repeatability under the approved operating procedure. A storage-volume calculation cannot qualify a feeder or justify increasing the hopper’s safe loading.
For an ENVO enquiry, include the resin application, existing grade, volume constraints and required physical tests. If a candidate changes powder capacity or refill frequency, include that operational effect in the purchasing comparison rather than treating only price per tonne as relevant.
Related decisions
- PVC K-value and SG grade names: require a documented cross-reference
- PVC plasticizer absorption: distinguish a resin test from the dry-blend endpoint
Review Polyvinyl Chloride (PVC) Resin product identity and purchasing requirements. For the decision above, send ENVO your application, acceptance criteria, quantity and destination. Confirm the offered grade and available documents before ordering.
Technical references support the stated material or test method. Confirm the offered grade and current acceptance criteria for your application. Quality and document guidance
Share your application, target properties and test conditions to discuss the next step.
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