Plastic Testing & Quality Control Quality Checklist
intermediate45-60 minutes0/22 completed
This comprehensive checklist ensures consistent quality control in plastic testing laboratories. Follow these protocols to maintain accurate test results, proper equipment calibration, and reliable polymer characterization for incoming materials and finished products.
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Equipment Calibration & Maintenance
Verify melt flow indexer temperature calibration
critical
Calibrate universal testing machine load cells
critical
Check impact tester energy calibration
high
Validate DSC temperature and heat flow
high
Inspect specimen preparation equipment
medium
Test Method Verification
Confirm appropriate ASTM test method selection
critical
Verify test conditions match material grade
critical
Document conditioning requirements
high
Validate sample size and replication
high
Check ISO to ASTM method equivalency
medium
Verify colorimeter settings for appearance testing
medium
Data Analysis & Reporting
Calculate statistical parameters for test results
critical
Compare results to material specifications
critical
Document test environment conditions
high
Archive raw data and test records
high
Generate trend analysis charts
medium
Quality Control Protocols
Run control samples with each test batch
critical
Perform duplicate testing on critical lots
high
Implement blind check testing program
high
Conduct round-robin testing for new methods
medium
Review and update lot acceptance criteria
medium
Maintain proficiency testing participation
low
Pro Tips
Always pre-condition hygroscopic materials like nylon and PET for 24+ hours at 23°C/50% RH before testing to ensure consistent moisture content.
Keep MFI test weights and die clean and free of polymer residue - even small amounts can significantly affect flow rate measurements.
Use the same operator for comparison testing when possible, as technique variations can introduce bias in manual test methods like impact testing.
Document any unusual sample appearance (voids, contamination, color variations) as these can correlate with unexpected test results.
Establish good relationships with Colorado Sun Inc technical team - they can provide valuable insights into material history and processing recommendations that affect test interpretation.