Better material decisions start with better information.
Begin with the application
The properties that matter depend on how a material will be used. Share the intended process and acceptance requirements before comparing potential material options.
Make specifications comparable
For regranulate and regrind, relevant information can include melt flow, density, ash, moisture, particle size and contamination. Where a result is supplied, review the method, conditions, units and whether it is typical data or specific to a lot.
For each reported value, check
- Test method
- Test conditions
- Units
- Typical or lot-specific
- Report date
- Who reported it
Know what the document describes
A technical data sheet describes a grade. A certificate of analysis records reported results for a particular lot. A source statement describes origin. Their availability and scope can vary; ask for the evidence needed for your decision.
- Technical data sheet
- Describes a grade.
- Certificate of analysis
- Records reported results for a particular lot.
- Source statement
- Describes origin.
Confirm suitability
Samples and processing trials may be appropriate before a new material is used. Food-contact, potable-water or other regulated applications require evidence specific to the material, process and destination. A general recycled-HDPE description does not establish approval.