Quality Control & Laboratory
Every masterbatch grade is released by the lab, not the line.
Melt flow, dispersion and color are measured before a lot leaves Rajkot. The same methods stand behind every typical value on our technical data sheets.
Core Tests
Three measurements that predict your line.
MFI testing
ASTM D1238 / ISO 1133
Melt flow index at 190°C under 2.16 kg (and 21.6 kg for pipe grades) confirms the masterbatch will let down cleanly into your resin.
Dispersion analysis
EN 13900-5 · ISO 18553 · DIN 53770
Filter pressure value at 14 μm, microtome dispersion rating and 45 μm mesh retention reveal agglomerates before they reach your screen pack.
Spectrophotometry
Delta-E · CIE whiteness
Instrumental color measurement approves shades to Delta-E < 0.5 and verifies whiteness index on filler compounds.
Test Methods
The standards behind our TDS values.
Typical properties on our technical data sheets are reported against these international methods.
| Property | Method | Reported on |
|---|---|---|
| Active pigment / filler contentMB-W70-PE, CP-CA80-PE | ASTM D5630 / ISO 3451-1 | MB-W70-PE, CP-CA80-PE |
| Carbon black contentMB-BLK40-AG | ASTM D1603 / ISO 6964 | MB-BLK40-AG |
| Specific gravity (density @ 23°C)All standard grades | ASTM D792 / ISO 1183 | All standard grades |
| Melt flow indexAll standard grades | ASTM D1238 / ISO 1133 | All standard grades |
| Moisture / volatilesAll standard grades | ASTM D6980 | All standard grades |
| Filter pressure value (14 μm)MB-W70-PE, MB-BLK40-AG | EN 13900-5 | MB-W70-PE, MB-BLK40-AG |
| Dispersion rating (microtome)MB-BLK40-AG | ISO 18553 | MB-BLK40-AG |
| Mesh retention (45 μm)CP-CA80-PE | DIN 53770 | CP-CA80-PE |
| Thermal heat stabilityAll standard grades | DIN 53772 | All standard grades |
| Light fastnessMB-W70-PE, color masterbatches | ISO 105-B02 (Blue Wool) | MB-W70-PE, color masterbatches |
| Kinetic coefficient of frictionMB-ADD-SAB | ASTM D1894 | MB-ADD-SAB |
| Haze / optical clarityMB-ADD-SAB | ASTM D1003 | MB-ADD-SAB |
| Primary particle sizeMB-BLK40-AG, MB-ADD-SAB, CP-CA80-PE | ASTM D3849 (TEM) · laser diffraction | MB-BLK40-AG, MB-ADD-SAB, CP-CA80-PE |
| Bulk densityMB-W70-PE | ASTM D1895 | MB-W70-PE |
Shade Matching
The 48-hour lab loop.
Color matches follow the same documented four steps every time.
- 01
Target Shade / Part Submission
Send a RAL or Pantone code, a reference part or a physical sample, with your base polymer and process.
- 02
Carrier & MFI Calibration
We select the carrier and tune melt flow so the masterbatch lets down cleanly into your resin.
- 03
48-Hour Plaque Extrusion
Lab plaques are extruded and checked by spectrophotometer to Delta-E < 0.5 within 48 hours.
- 04
Trial Lot Dispatch (5–25 kg)
Approve the plaque and a 5 – 25 kg trial lot ships for your production line trial.
FAQ
Lab tests, answered.
What is a filter pressure value (FPV) test?
A dispersion test to EN 13900-5: melt is pushed through a fine 14 μm screen and the pressure rise is reported in bar/g. Lower values mean better dispersion, fewer screen changes and fewer specks in film. MB-W70-PE is specified at FPV < 0.8 bar/g and MB-BLK40-AG at FPV < 1.0 bar/g.
How is masterbatch MFI tested?
Melt flow index is measured to ASTM D1238 / ISO 1133 at 190°C under 2.16 kg, and under 21.6 kg for pipe grades, to confirm the masterbatch will let down cleanly into your resin.
How is carbon black dispersion rated?
By microtome dispersion rating to ISO 18553; MB-BLK40-AG is rated ≤ 2. Carbon black content is checked to ASTM D1603 / ISO 6964.
Free Sample
Have a line trial coming up? Let's match the grade to it.
Send your polymer, process and target let-down. Our Rajkot lab confirms the grade and dispatches a sample or a 5 – 25 kg trial lot.