CR Foam (Neoprene)
Chloroprene rubber (CR) foam, closed-cell structure, excellent weather resistance, ozone resistance and flame retardancy. Combines sealing and cushioning, easy adhesive backing, outstanding value. Preferred for door/window enclosure sealing, automotive and outdoor equipment general sealing.
Key Features
- Weather & ozone resistant — durable outdoors
- Flame retardant up to V-0
- Sealing and cushioning combined
- Easy adhesive backing, convenient processing
Applications
Door/window & enclosure sealing · Automotive sealing · Outdoor equipment protection · HVAC pipe insulation
Material Tags
Technical Parameters
| Material | Chloroprene rubber (CR) |
|---|---|
| Density | 20–230 kg/m³ |
| Thickness | 1–20 mm |
| Temperature | −40 ~ 90 °C |
| Flame Retardant | Up to V-0 |
| Structure | Closed-cell |
| Compression Set | ≤ 30% |
Frequently Asked Questions about CR Foam (Neoprene)
Common questions about die-cutting and material selection for this product
PORON Foam vs EVA Foam Die-Cutting Differences?
PORON is microcellular polyurethane foam with excellent resilience and low compression set — ideal for cushioning, sealing, and repeated compression. EVA is ethylene-vinyl acetate copolymer foam — harder, lower cost, suitable for gap filling and one-time cushioning. Die-cutting processes differ: PORON requires sharp dies to prevent tearing; EVA needs controlled pressure to avoid overcuts.
How to fix burrs on foam edges after die-cutting?
Burrs are usually caused by a dull die or excessive die-cutting pressure. Solutions: use etching or laser dies (30-45 degree blade angle), adjust pressure to just cut through the material, lower the die-cutting speed appropriately, and ensure uniform material thickness. For ultra-soft foam, freeze-and-shape before die-cutting.
How to control dimensional rebound of foam after die-cutting?
Foam materials rebound 0.1-0.3 mm after die-cutting due to compression recovery. Control methods: make die clearance 5-10% smaller than material thickness, let parts rest over 30 minutes before measuring, and reserve rebound allowance in the tolerance. For high-precision parts, use a secondary finishing cut.
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