HG/T 2411 is a 90° flexing test method used to evaluate a sole material’s resistance to flex-cracking by tracking crack growth from a controlled pre-cut under repeated bending.
It is commonly applied in footwear material qualification and incoming/production QC for polymeric sole compounds and finished sole sheet/stock. If you need help matching your product requirement to the right edition and test temperature, talk with our team.
HG/T 2411: Shoes/Sole materials — 90° flexing (crack growth) test method
HG/T 2411 provides a standardized lab approach for creating a defined cut (notch) in a sole-material specimen, flexing it through a specified angle, and then assessing how the cut propagates with repeated cycles.
This type of method is typically used when durability concerns are driven by repeated walking-induced bending, where small defects can grow into visible cracks.
Quick Definition
Standard type: Test method.
What it measures: Resistance to flex-cracking expressed through crack growth from a pre-cut after repeated 90° flexing cycles.
Typical output: Crack length/growth and observations at specified cycle counts (format depends on the cited edition and product requirement).
What This Standard Covers
HG/T 2411 focuses on a controlled flex-fatigue scenario: a prepared specimen with an initial cut is repeatedly flexed, and the crack is evaluated as it extends.
In addition to the cycling procedure, the standard typically addresses key variables that can affect results, such as specimen preparation, conditioning, and test temperature.
Why This Standard Matters in Testing
Flex-cracking is a common durability failure mode for footwear soles, especially where the sole repeatedly bends in the forefoot region. A repeatable crack-growth method supports material comparisons, supplier approvals, and lot-to-lot consistency checks.
For procurement and QA/QC, it also helps translate “wear cracking” concerns into a measurable lab screen that can be written into internal specifications or customer requirements.
Common Materials, Product Types, or Applications Covered
HG/T 2411 is used for polymeric sole materials where flex-fatigue cracking is a concern, including thermoplastic elastomer-type sole compounds and polyurethane-type sole materials (the exact material scope and exclusions depend on the cited edition and the product standard referencing it).
It is often applied to footwear sole sheets, molded sole material, or representative material taken from production that can be prepared into the required specimen geometry.
Common Test or Verification Workflow
HG/T 2411 is most often used as part of a durability verification workflow rather than a single stand-alone acceptance test.
Common workflow: Define the required edition and test temperature in the product requirement → prepare and condition specimens → introduce the specified pre-cut → run flex cycling to the required cycle counts → measure and report crack growth and visual condition.
Practical caution: Results can be highly sensitive to specimen thickness, notch quality, clamping alignment, and temperature control. For comparable data across sites, keep fixtures, cutting tools, and conditioning practice consistent.
Equipment Commonly Used for This Standard
Equipment selection is driven by the need to apply repeatable 90° flexing cycles while holding specimens securely and allowing crack growth to be evaluated at defined intervals.
Common equipment: 90° sole-material flexing (fatigue) tester with appropriate specimen clamps/holders; controlled cutting/notching tool or cutter guidance fixture; conditioning environment (as required); measuring tools for crack length (as required by the cited edition).
If you are comparing flexing-tester capacities, fixture sets, or temperature-control options, you can request a detailed quote for a configuration matched to your throughput and specimen types.
How to Read This Designation or Revision
HG/T 2411: An HG/T-designated chemical-industry recommended standard.
“2006” in HG/T 2411-2006: The publication year that identifies the specific edition.
When revision details matter: Always match the edition cited in your customer specification or internal requirement, because specimen preparation details, conditioning temperature, cycle requirements, and reporting format can change between editions.
Related Standards, Methods, or Frameworks
HG/T 2411 is commonly referenced alongside other footwear durability tests (for example, whole-shoe flexing or sole flexing methods) depending on whether the requirement is material-level screening or finished-product verification.
Some editions are aligned with ISO 4643 for 90° flexing of sole materials; when international equivalency is important, confirm the exact edition and the calling specification’s requirements before treating results as interchangeable.
Get help selecting a compliant flexing setup
If you want to run HG/T 2411 consistently across suppliers or sites, we can help you align the tester configuration, fixtures, and temperature/conditioning approach to the edition and product requirement you are working to—contact our team.
