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EPDM Closed Cell Sponge
Description
Technical Parameters
Custom OEM/ODM Grade EPDM Closed Cell Sponge Rolls
Product Description
Our EPDM closed cell sponge is engineered for OEM and ODM partners requiring precise material properties, custom dimensions, and value-added fabrication. The closed-cell structure provides an impenetrable barrier against water, rain, and moisture while effectively dampening noise and vibration. This sponge material can be tailored in density, hardness, color, and surface finish to match specific sealing, shock absorption, or thermal insulation requirements. The material exhibits excellent ageing properties and does not degrade through time, making it ideal for long-lifecycle products.
Customization Capabilities
Values represent industry-available ranges
|
Customization Parameter |
Available Options |
|
Density Range |
65 – 350 kg/m³ (4 – 22 lb/ft³) |
|
Hardness (Shore OO) |
5 – 60 ±5-10 |
|
Hardness (Shore C) |
10 – 50 ±5 |
|
Thickness |
1mm – 60mm |
|
Sheet Size |
Up to 1500mm × 3000mm (59" × 118") |
|
Adhesive Backing |
Single-sided / Double-sided (Acrylic or Rubber-based) |
|
Color |
Black (Standard), White, Gray, Custom RAL |
|
Surface Treatment |
Corona, Primer, Smooth skin, Peeled skin |
|
Flame Retardancy |
UL94 V-0, 5VA, HF-1; FMVSS-302 |
Core Advantages for OEM/ODM
- Tailored formulations: We adjust polymer/filler ratios to achieve target compression set, rebound, or flame retardancy. UL94 V-0, 5VA, and HF-1 listings are available at various thicknesses
- Value-added fabrication: Die-cutting, slitting, kiss-cutting, and lamination to fabrics or films
- Consistent batch-to-batch quality: Every production lot is tested for density, hardness, compression set, and water absorption before release
- Rapid prototyping: Sample tooling available within 5-7 working days
- Compliance support: RoHS, REACH, and UL documentation available
Applications
Automotive weather-stripping and interior anti-rattle pads
Appliance damping (washing machines, dishwashers, AC units)
Control cabinet sealing (IP-rated dust and moisture protection)
Marine deck padding and hatch seals (saltwater resistant)
Medical equipment cushioning and padding
HVAC system vibration isolation
Packaging & Transportation
Rolls are wound on cardboard cores (standard 3" or 6" ID), wrapped in PE film, and packed in export cartons. For large orders, sheets are palletized with interleaved release liners to prevent blocking. For die-cut parts, anti-static trays or tape-and-reel packaging is available. Minimum order quantity for custom formulations: 500 sheets or equivalent volume (negotiable for samples).
Factory FAQ
Q1: We want adhesive backing, but previous suppliers' tape always fell off. How do you solve this?
A: Adhesion failure usually comes from three causes: mold release residue on the surface, the sponge absorbing solvent from the tape adhesive, or low surface energy. Our OEM solutions include:
- Corona treatment to increase surface energy to >40 dynes/cm²
- Pre-applied primer service (ready for immediate bonding)
- Using acrylic transfer films specifically designed for porous materials (not standard double-sided tape)
Recommended bonding process for maximum adhesion: Wipe with isopropyl alcohol → Light abrasion (120-180 grit) → Apply adhesive → Pressure cure for 24 hours at room temperature.
Q2: Stacked sheets stuck together after storage. How do we prevent this?
A: Under high temperature (>35°C / 95°F) and heavy pressure, plasticizers and low-molecular-weight components can migrate to the surface and cause "blocking." Our solutions for OEM orders:
- Interleave PE release film between layers (specify when ordering)
- Fully cool sheets to below 30°C before packing
- Limit stacking height to 1.2 meters (approximately 4 feet)
If light blocking has occurred, talcum powder dusted between layers can separate them. For severe cases, gentle warming (40-50°C) helps release the bond.
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