Porous Urethane Foam for High-Deflection PA Series

This porous, high-deflection urethane foam component is used in injection-molded assemblies where controlled compression and repeatable force are required. The pillar form factor with a through hole helps engineers locate and stabilize the spring element within a fixture, reducing misalignment during cycling.

• Automotive interior and vibration-damping stacks: When vibration levels vary, the porous structure manages deformation while maintaining predictable damping response. The high-deflection PA-type urethane supports stable compression under fluctuating loads.
• Consumer electronics protective/support modules: The through hole enables reliable positioning in housings or brackets so the spring returns to a consistent deflection profile after repeated impacts.
• Medical and precision equipment interfaces (non-critical where elastomer use is acceptable): The design supports energy absorption with up to 40% max. elongation, helping protect adjacent components during assembly and service loads.

For these scenarios, selecting the correct outer diameter and length ensures the desired maximum load range and deflection behavior.

The component uses a high-deflection PA-type urethane foam, engineered for controlled compression and energy absorption. Its porous microstructure distributes stress and helps limit localized collapse, supporting repeatable force behavior across load cycles.

• Hardness / wear behavior: As a urethane foam spring element, it is optimized for flexibility and damping rather than metal-like wear resistance; wear is typically governed by compression fatigue and abrasion at contact points.
• Toughness trade-off: Higher deflection capability improves impact energy absorption, but it can reduce stiffness compared with denser elastomers under the same geometry.
• Heat treatment: No metal heat treatment (e.g., quench & temper, nitriding) is applicable because the product is a molded foam elastomer, not a steel mold part.

When comparing options within urethane spring families, prioritize foam density/structure (high-deflection behavior) rather than hardness-focused metal properties.

Select foam geometry to match the spring envelope and the required force level. Use the provided ranges for outer diameter (D) of 30–120 mm and length (L) of 30–160 mm to fit the mold insert cavity/fixture space and to achieve the target compression performance.

• Match maximum load: Choose a D/L combination that falls within the specified maximum load (N) range of 1471–30793 N for your expected working load with appropriate safety margin.
• Plan for through-hole alignment: Since this variant includes a through hole, ensure your locating pin/bolt diameter and positioning in the molded assembly are compatible with the foam’s hole feature to prevent shear or off-axis compression.
• Tolerance and fit: Foam elements compress elastically, but tight alignment still matters—use clearance for assembly features to account for foam deformation during installation and cycling.

This product is sized by fixed dimensions (D and L) within the stated ranges; pick the nearest available size and then validate compression deflection against your assembly cycle conditions.