ASTM D903 Peel & Stripping Strength Testing Services

ASTM D903 describes the test to determine comparative peel or stripping strength properties of adhesive bonds, using standard specimens under specified pretreatment and test conditions. It is a 180° peel test using a flexible adhesive. The ASTM D903 peel strength is expressed as kilograms per millimeter of width.

Talk to an Expert

ASTM D903 Peel & Stripping Strength Testing Services

TRUSTED BY

Precision-driven testing for dimensional accuracy and compliance

Overview
Scope, Applications, and Benefits
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

ASTM D903 is a standard method for determining the stripping strength (peel strength) of adhesive bonds. These adhesive bonds form between a rigid substrate and a flexible material, such as tape or film. In this method, the rigid substrate and flexible materials are pulled apart at a constant speed, and the angle between them determines the required separation force. It is used to assess the strength, adhesive performance, and durability of materials such as laminates and tapes.

The ASTM D903 test method covers adhesive bond strength. It applies to standard-sized adhesive-bond specimens, under pre-treatment, temperature, and testing-machine-speed specifications that determine their peel or stripping properties.

Scope, Applications, and Benefits

Scope

The ASTM D903 test method provides a standardized approach for adhesive bond testing under controlled conditions. Peel strength, in kilograms per millimeter of width, refers to the force needed to separate the two adherents by peeling them at a 180° angle. This test is critical in demonstrating the performance of flexible adhesives in various industrial applications.

Applications

It is helpful to evaluate adhesive strength under peel loading conditions.
Differentiate adhesive formulations based on chemical composition.
It helps identify adhesives with superior bond strength.
For the research and development of adhesive bond strength

Benefits

Effective in determining the effect of bond line thickness on adhesive strength.
Supports quality control by ensuring consistency and reliability of bonded products.
Assists in material selection for applications where peel forces are critical
Facilitates research and development by validating improvements in adhesive formulations.
Enhances product durability and safety in industries relying on adhesive bonding.
Applicable across a wide range of industries, including automotive, aerospace, packaging, construction, and electronics

Testing Process

Specimen Preparation

Long, narrow flexible strips are bonded to rigid substrates. Surfaces are adequately prepared, adhesive is applied, and specimens are cured in accordance with the specified instructions.

Mounting & Alignment

The rigid substrate is clamped vertically in the testing machine to ensure uniform peeling

Controlled Tensile Loading

A constant peel rate is applied by the testing machine, generating a tensile force that generally acts on the adhesive bond.

Data Acquisition & Fracture

Peel force is continuously recorded during peeling. The average load is calculated, and the results are used to evaluate peel strength

Technical Specifications

Parameter	Details
Test Method	180° peel or stripping strength measurement
Test Equipment	Universal Testing Machine (UTM)
Crosshead Speed	As specified in ASTM D903
Load Measurement	Calibrated load cell with a suitable range
Specimen Width	Standard width as per ASTM D903
Test Output	Peel strength reported as force per unit width

Instrumentation Used

Universal Testing Machine (UTM)
Load cell (suitable low-force range)
Peel test grips or fixtures
Constant-rate crosshead drive
Data acquisition and analysis software
Measuring scale or calipers

Results and Deliverables

ASTM D903 specifies a standardized test method for determining the peel or stripping strength of adhesive bonds.
It provides a uniform, reproducible procedure for the qualitative assessment of adhesive performance.
The test is widely applicable across industries where adhesive bonds are critical to product quality, durability, and safety.
ASTM D903 enables manufacturers to gain valuable insights into the properties and performance of adhesives.

Frequently Asked Questions

To perform a test for ASTM D903, the adhesive materials must be cut into specimens 1" x 12" long. The specimens are then peeled away from either a flexible or rigid substrate at a 180° angle at a separation rate of 152.4 mm/min, or 6in/min.

The ASTM D1002 test method is one of the most common methods for determining the bond strength of adhesives when tested on a single-lap-joint specimen on a metal-to-metal bonded test panel.

ISO 11339 uses a T-peel test to measure the comparative peel properties of adhesive bonds between flexible adherents.

ASTM D903 can be used to test a variety of adhesive bonds, including those between metals, plastics, rubber, and paper.

Related Blogs