Evaluation after Molding
Plastics are used in all sorts of products, ranging from household goods to automobiles and electrical products. Each of those products must have the mechanical properties necessary for maintaining their structure, the durability necessary for enduring the product service life intended when designed, and other characteristics. Therefore, the mechanical properties, durability, or other characteristics of molded plastics need to be evaluated after molding to make sure they satisfy product requirements. They also need to be evaluated to determine why they developed such characteristics. Evaluations performed after molding are listed below.
| Evaluation | Instrument | |
|---|---|---|
| Evaluation of Mechanical Properties | Tensile, bending, and compression testing | Universal testing machines |
| Hardness testing | Hardness testers | |
| Impact testing | High-speed impact testing machines | |
| Fatigue testing | Fatigue testing machine | |
| Viscoelasticity | Fatigue testing machine | |
| Evaluating Thermal Properties | Glass transition point, melting point measurement | DSC |
| Linear coefficient of expansion | TMA | |
| Measuring Density | Dry pycnometers | |
| Evaluation of Optical Properties | Transparency | UV |
| Color difference | UV | |
| Turbidity | UV | |
| Glossiness | UV | |
| Observing Internal Structures | Observing distribution of voids and fillers | X-Ray CT |
| Chemical Structural Analysis | FTIR, Raman, MALDI, LC/MS | |
| Physical Structural Analysis | FTIR, Raman | |
| Observing morphology | SPM |
