ASTM D882 is a widely recognized standard developed by ASTM International for evaluating the tensile properties of 

thin plastic sheeting and films, typically less than 1.0 mm (0.04 in) thick. This test method is essential for manufacturers, 

researchers, and quality control professionals to assess material performance under tension, ensuring suitability for 

applications in packaging, medical films, agricultural covers, and more.

Scope and Significance

The standard measures key tensile properties, including:

Tensile Strength – Maximum stress before failure

Yield Strength – Stress at which permanent deformation begins

Elongation at Break – Stretchability before rupture

Modulus of Elasticity – Material stiffness

These properties help determine durability, flexibility, and load-bearing capacity, critical for applications like food 

packaging, industrial films, and flexible electronics.

Test Apparatus and Setup

Testing instrument：ETT-A Multipurpose Tester

The test requires:

Tensile Testing Machine – With precise load cell and crosshead speed control (±2%)

Grips – Pneumatic or roller grips to prevent slippage

Extensometer – For accurate strain measurement (optional but recommended)

Environmental Chamber – For controlled temperature/humidity testing (if needed)

Proper alignment is crucial to avoid skewed results.

Specimen Preparation

Sampling: Specimens should represent the entire film batch.

Geometry: Dumbbell-shaped (Type IV) or straight strips (15–25 mm wide).

Cutting: Precision die-cutting to avoid edge defects.

Conditioning: ASTM D618 recommends 23°C and 50% RH for 40+ hours before testing.

Test Procedure

Mounting: Secure specimen in grips with proper alignment.

Preload: Apply minimal tension (~0.1 N) to remove slack.

Testing Speed: Typically 5–500 mm/min, depending on material.

Data Collection: Record load, elongation, and failure mode.

Applications

ASTM D882 is used in:

Packaging – Ensuring film strength for sealing and handling

Medical Films – Verifying tear resistance and flexibility

Agriculture – Testing mulch and greenhouse film durability

Electronics – Evaluating flexible substrate reliability

Limitations & Complementary Tests

While ASTM D882 provides essential tensile data, it does not account for:

Biaxial stresses (use ASTM D6693)

High-speed impacts (use ASTM D1709)

Tear resistance (use ASTM D1922)

Conclusion

ASTM D882 is a vital standard for assessing the tensile behavior of thin plastic films, ensuring material consistency 

and performance. By following precise testing protocols, manufacturers can optimize film properties for diverse 

applications, maintaining quality and reliability in end-use products.