Exploring SERFs and their response to shock forces

When evaluating self-engaging reclosable fasteners (SERFs) for various applications, a key consideration is how well they handle shock forces — sudden, high-amplitude impacts. This is where SERFs offer unique advantages over traditional fasteners such as screws, bolts and double-sided adhesive systems.

What are shock forces?

Shock forces can occur in many situations. For instance, an external object might bump into a surface or energy could be transmitted through the structure, such as when a vehicle hits a pothole. Each fastening system is designed to respond to shock in specific ways, with their resistance to such forces being determined during production.

How do different fastener types handle shock

• Mechanical fasteners (e.g. screws, bolts): rely heavily on tensile strength to resist disengagement under shock or vibration forces.
• Adhesive systems: use surface engagement combined with energy-absorbing materials (such as viscoelastic gels and compressible foams) to dampen impacts.
• SERFs: handle shock forces through a combination of:
  • recoverable deflection of the engagement elements and backing material
  • tensile strength of the engagement elements
  • friction between the engagement elements

SERFs can also be enhanced by combining them with adhesive systems that provide additional surface engagement and energy absorption, further boosting the fastener's performance.

Duotec^® SERFs: engineered for shock resistance

Binder’s Duotec^® product family includes specific variants designed to withstand accidental disengagement caused by shock. The 42 and 50 models, for example, incorporate woven yarns in their engagement elements that offer excellent flexibility and durability to handle shock forces effectively.

For more details on the Duotec^® product family or to find the best solution for your application, explore our website or contact a Binder representative.