The
most general definition of foam is a substance that is formed by
trapping many gas bubbles in a liquid or solid. In the packaging and
manufacturing industry, foam is a catch all for plastic-based materials
with gas expanded through them creating one of the most versatile and
economical packaging materials in use.
Many types of foam are available, the most common include:
1. Polyethylene foam
2. Polystyrene foam
3. Polyurethane foam
4. Polypropylene foam
Further
designations include whether foam is expanded (as in expanded
polystyrene), open or closed cell, density (usually express in pounds
per cubic foot or kilograms per cubic meter), color, and special
functional characteristics such as fire retardancy and static
dissipation.
Foams are used on their own and in tandem with many
other materials. Some examples of products utilizing foam materials can
be seen on this page. Alta Max furnishes materials and products that
include foam meeting the following specifications, to name just a few:
1. A-A-59136
2. A-A-59315
3. PPP-C-1752
4. MIL-P-26514
5. MIL-P-19644
6. MIL-PRF-20092
7. MIL-C-26861
8. ASTM-D4819
9. MIL-P-60312