Evaluating Recycled Plastic Granule Performance
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Assessing recycled polymer granule integrity is critical for consistent end-product performance
Conduct an initial visual evaluation to spot variations in shade and granule shape
Deviations in form, tone, or the presence of debris may point to insufficient sorting or inadequate cleaning in the recycling cycle
Determine hydration levels via calibrated moisture sensors or standardized thermal drying procedures
Too much water may lead to voids or structural flaws during extrusion or molding, requiring moisture levels under 0.1% for optimal performance
Determine the melt flow rate to evaluate the polymer’s fluidity under heat
It indicates potential chain scission resulting from thermal or mechanical stress in prior تولید کننده کامپاند پلیمری applications
A significant drop in melt flow compared to virgin material may mean the polymer has lost molecular weight and may not be suitable for high performance applications
Conduct density testing using a pycnometer or buoyancy method
Unusual density readings often reveal the presence of unintended plastic types or impurities in the batch
Assess performance metrics like yield strength, ductility, and shock absorption using standardized molded test bars
Validate outcomes against the performance thresholds defined for the final component or part
Material failing to meet specs may require compounding with virgin feedstock or undergoing re-extrusion and filtration
Apply FTIR analysis to verify molecular structure and uncover hidden contaminants or polymer mixtures
Conduct DSC testing to monitor phase transition temperatures and crystallization kinetics
Shifts in Tm or Tc often reflect chain breakdown or contamination from foreign substances
Ensure comprehensive documentation and preserve archived specimens for audit and quality review
Consistent, thorough testing ensures recycled granules meet quality standards and helps build confidence in using recycled materials for sustainable manufacturing
- 이전글The Impact of Processing Temperature on Polymer Degradation 25.12.22
- 다음글Understanding Regulatory Standards for Recycled Plastics 25.12.22
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