Quality Control (QC) and Quality Assurance (QA) are part of the Quality Management (QM) QC is focused on fulfilling quality requirements. It is the inspection aspect of QM; meanwhile, QA refers to how a process is performed or how a product is made.
QC of plastic packing includes Visual, Dimensional and Plastic container inspections and protocols, Raw Materials Inspection Test and Packaging.
Materials inspection: Consist of raw material (resin and master batch) verification of its quality and absence of toxic or incompatible substances.
Visual Inspection: Involves: Color comparison (using Colorimeter equipment), Inspection in Line and Finished Production (looking for production defects), Rubbing off check (checking coating quality), Opacity evaluation (using opacity meter), Transparency evaluation (using transmittance meter)
Dimensional inspection: Individual parts inspection: weight, overflow capacity, wall thickness and uniformity.
Packaging inspection: Includes packaging cases (trays and boxes), labeling and wrapping checking to ensure the reliable transportation and delivery of the plastic material.
Plastic container: Includes: Liquid penetrant test (checking permeability, Constant-top-load test (checking withstand top-load pressure capability) and Elevated internal pressure test (ability to withstand internal pressure)
US Pack group QM protocols include the following QC tests and QA procedures:
-
Body Dimension:
-
Overall Height (h)
-
Diameter (D)
-
Neck dimensions (T, I, H, E)
-
Overflow Capacity: (VOLUME)
-
Weight
Standards: Blueprint approved by Customer and ASTM 2911.
-
Leak Test: Leak Test show if the bottle with a standard lid, have some leak when you apply some pressure. Standards: Internal Procedure.
-
Wall thickness: The thickness of the bottle, usually measured along the side walls. Standards: Blueprint approved by Customer and historical data.
-
Color: compare the color of the bottles manufacturing versus the color of the bottle required by the client. Standards: Pantone approved by Customer.
