ASTM D2923 Standard Test Method for Rigidity of Polyolefin Film and Sheeting

Get Certified ASTM D2923 Testing for Reliable Polyolefin Film and Sheeting

Polyolefin films and sheets need suitable rigidity to maintain their shape and perform consistently during handling and converting. ASTM D2923 specifies a standardized procedure for determining this property under controlled laboratory conditions. Manufacturers use the results to assess film-handling properties, compare polyolefin materials, and support quality control of film and sheeting products.

• Measures the rigidity of polyolefin film and sheeting. 
• Provides Procedure A using high-voltage static eliminators and PTFE-fluorocarbon-coated plates.
• Provides Procedure B using a fine powder on uncoated plates. 
• Reduces the effects of static electricity and friction during measurement. 
• Understands that the two procedures can yield different outcomes.

What are the uses of ASTM D2923 testing? 

Laboratories use the ASTM D2923 test method to determine how readily polyolefin film or sheeting resists flexure. Manufacturers can use the measured rigidity to assess handling and converting performance and to compare materials or production lots. This testing-

• Measures film rigidity of polyolefins and flexure resistance and supports film and sheeting quality control.
• Helps compare different polyolefin materials and evaluate machinability.
• Helps assess whether a cut web can remain temporarily flat. 
• Facilitates materials selection for conversion and packaging applications.

Which materials can be tested under ASTM D2923?

ASTM D2923 applies to polyolefin film and sheeting. Laboratories can use the method to evaluate the rigidity of these flexible polymeric materials when they need to characterize flexural resistance.

Why is ASTM D2923 important?

ASTM D2923 is a standard method for measuring a property that directly impacts the handling and machinability of polyolefin webs. Film rigidity varies with thickness and inherent material stiffness, so laboratories use specific methods to evaluate their combined effects. Procedure A and Procedure B use different approaches to minimize these effects.

ASTM D2923 Testing Process and Data Collection

Technicians first select representative polyolefin film or sheeting specimens and choose procedure A or B based on the desired testing conditions. Then, they place the specimens on a rigidity tester and apply specific methods to control static electricity and friction. The apparatus bends the specimen to the specified groove or slot to measure the load. Laboratories document sample rigidity with specimen identification, the chosen method, and relevant observations. When the material has directional properties, laboratories may evaluate specimens in the appropriate orientations to characterize the material consistently.

Common Challenges and Troubleshooting

Consistent specimen preparation is required for accurate, reliable testing, and static electricity and friction must be properly controlled. ASTM D2923 includes two procedures, as they can affect the measurement. Some of the common problems are: the dimensions of the specimen are not correct; the apparatus is not set up correctly; the specimen rubs against the test surfaces; static electricity occurs; Procedure A or Procedure B is not correctly used; the orientation of the specimen is not the same; the instrument is not truly calibrated; and the film thickness is not consistent. Technicians should ensure the specimen is clean, test the apparatus before testing the specimen, control static and friction, and use the same testing procedure when comparing different materials.