ASTM D828 is an international standard used to evaluate the tensile properties of paper and paperboard. It provides guidelines for conducting tensile tests using constant-rate-of-elongation (CRE) equipment.
Key Testing Components
- Mechanical Vise Grips: Cost-effective and versatile.
- Pneumatic Grips: Adjustable for precise alignment.
- Universal Testing Machines (UTMs): Machines with a capacity of 50N–2kN are ideal for this test.
ASTM D828 Testing Procedure
- Specimen Preparation: Follow the specified dimensions and conditioning requirements.
- Specimen Alignment: Ensure proper placement within the grips.
- Grip Pressure Optimization: Adjust pressure settings for accurate results.
- Load Application: Apply a load at a constant separation rate.
- Test Completion: Continue until specimen failure.
Measurements in ASTM D828 Testing
- Tensile Strength at Rupture: Maximum force before breaking.
- Elongation at Rupture: Percentage of length increase before failure.
- Tensile Energy Absorption: Energy required to break the specimen.
This standard is widely used in Malaysia’s paper and packaging industry to ensure quality and durability.