Many types of foam are available to ensure the proper protection of your valuable equipment. The most common types of foam used in Anvil cases are described below. Please contact us for any special foam requirements.

Polyester Foam Specifications

2.0 PCF(pounds per cubic foot)

• 2.0 PCF, means, a cubic foot density as follows:
  A 12” cube weighs 2 pounds-it requires 50-65 pounds to depress a 4” thick block 1”

3.8 PCF (pounds per cubic foot)

• 3.8 PCF, means, a cubic foot density as follows:
  A 12” cube weighs 3.8 pounds-it requires 60-80 pounds to depress a 4” thick block 1”

Ethafoam (Polyethylene) Specifications

Advantages:

• Pleasing appearance
• Light Weight
• Flexible
• Closed cell – water absorption and water vapor transmission rates are very low
• Tough
• Durable
• Chemical resistant – exceptionally resistant to most solvents and other chemicals at room temp. Acids and alkalis normally have no effect
• Resilient – resists multiple impacts
• Excellent recovery from shock or strain
• Returns to shape quickly after impact

Disadvantages

• Combustible and should not be exposed to flame

References

• ASTMD-1596

Standard test method for shock absorbing characteristics of Package Cushioning Materials

• Federal specifications PPP-C-1752B

“Cushioning Material, Packaging, Unicellular Polyethylene foam Flexible”

• Mil-HDBK-304B

Military Standardization Handbook, Package Cushion Design

Anti-Static Foam Specifications

Purpose

• To protect against static discharge

Types

• Polyethylene – anti static
  Designed to extract static charge from an item and dissipate charge off surface of foam by use of a Surfactant (a chemical applied to foam at time of manufacturing)

• Polyurethane – Conductive
  Carbon filled; designed to extract static charge and conduct away from item