scope:

This specification covers cellular urethane plastic material designed for such applications as upholstery, general seating, mattresses, and other uses.

NOTE: The material will be designated as urethane foam in this specification.

The urethane foam shall be furnished in the following types as specified (see 6.2):

Type I - Conventional Type II - Conventional, combustion-modified* Type III - Filled Type IV - Filled, combustion-modified* Type V - High resilience, unfilled Type VI - High resilience, combustion-modified*

Urethane foams, Types I through IV, shall be furnished in the following classes, as specified (see 3.3, 3.5.1, and 6.2):

Class 1 - Super soft. Class 2 - Soft. Class 3 - Medium. Class 4 - Firm. Class 5 - Extra firm. Class 6 - Super firm.

Urethane foams. Types V and VI, shall be furnished in the following grades:

Grade HR-I (IFD at 25 percent deflection ≤ 67 Newtons/323 sq cm). Grade HP-11 (IFD at 25 percent deflection > 67 Newtons/323 sq cm).

Dimensions and thickness shall be as specified in the contract or order (see 3.2, table I, and 6.2).

intended Use:

Urethane foam is intended for use in general seating applications and other uses requiring a material capable of absorbing shock and vibration.