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What is polyurethane rigid foam

Rigid polyurethane foam is a rigid foam material made of polyurethane through a specific process of foaming. This material is not only hard, but also has excellent resistance to permanent deformation in compression, which makes it effective in resisting external vibration and impact. Even at extreme temperatures, polyurethane rigid foam maintains its integrity and effectiveness, making it a cushioning material for gasket design, sound and heat insulation, and more.
There are many types of polyurethane foam, including soft polyurethane foam, flexible polyurethane foam, fast-rebound polyurethane foam, and rigid polyurethane foam. Each type of foam has its own unique properties and application scenarios, but rigid polyurethane foam is widely used in all types of precision products for shockproofing and other roles due to its excellent physical properties.

PORON 4701-37

Main Characteristics

Excellent sealing to avoid gas release and atomization.

Resistance to compression and deformation, that is, the elasticity has durability, which can ensure that the accessories are protected by long-term anti-vibration.

Flame retardant, no harmful substances, no residue, no pollution of equipment, no corrosive to metal.

Can be used in a wide range of temperatures. From negative 40 degrees Celsius to 90 degrees range can be used.

The surface has excellent wettability, is easy to bond, easy to fabricate and easy to punch.

Engineered urethane formulations offer a wide modulus range - 2-90psi @ 25% deviation - to meet a wider range of design requirements.

Polyurethane Rigid Foam Main Applications

Main use

  • Panel sandwich: Role - no pollution, prevent loosening, prevent impact noise, prevent adhesion.
  • LED around: to prevent light leakage, absorb shock, high air tightness.
  • PCB under the periphery: absorb shock, absorb vibration, fill the gap, heat insulation effect.
  • Keyboard gasket: anti-elasticity, non-pollution, good dimensional stability.
  • Around the battery: non-polluting, shock absorption, improve airtightness.
  • Foot pads: good friction, no pollution, good dimensional stability.
  • Disk drive tail gasket: absorb shock, prevent impact noise, improve airtightness.
  • Friction gasket: good friction, no pollution, good dimensional stability.
  • Disk cover cushion: absorb vibration, block motor noise, shockproof, improve airtightness.
  • Around the speaker: prevent murmurs, fill the gap.
  • Around the LCD: prevent dust, absorb shock, fill the gap, and improve shading.

Selection Guide

  • Define requirements: Determine the required performance parameters according to the application scenario.
  • Performance Requirements: Select the appropriate performance index according to the actual requirements.
  • Density selection: Foams with different densities have different performance.

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