Peel Strength for Adhesive Bonds
ASTM D903 is a test method used to evaluate the peel or stripping strength of adhesive bonds. Peel strength for adhesive bonds measures the force required to separate two bonded materials at a specified angle, providing insight into the integrity and consistency of adhesive seals. It is commonly applied to laminated films, pouches, labels, and other packaging components where controlled peel strength is critical for both product protection and usability.
During testing, two bonded substrates are peeled apart (typically at a 180-degree angle) using a tensile testing machine at a controlled rate. One substrate is clamped while the other is pulled away, and the force required to continue separation is recorded over a defined distance. The result is reported as an average peel strength, often expressed in force per unit width (ie:kg/mm or lbf/in).
What is the purpose of ASTM D903 Testing?
The purpose of ASTM D903 testing is to characterize the strength and consistency of adhesive bonds, helping ensure materials perform as intended throughout manufacturing and use. While it is not typically used for sterile barrier seal strength testing (where methods such as ASTM F88 are more common), ASTM D903 is valuable for evaluating laminated structures, adhesive interfaces, and material compatibility. This makes it a useful tool during material selection, design verification, and quality control, where understanding bond performance is critical to overall package integrity.
Frequently Asked Questions
What is the rate in which ASTM D903 is performed?
This test method is tested at 12 in/minute.
Can you adjust the dwell time for ASTM D903 if desired?
Yes, you can have a 7 day well time at 23C/50% RH if desired.