MIL-DTL-24688A
TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY (TAPPI)
TAPPI T 803
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Puncture Test of Container Board
(Copies of this document are available from Technical Association of the Pulp and Paper Industry (TAPPI), 15
Technology Parkway South, Norcross, GA 30092 or online at www.tappi.org.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between
the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Qualification. The materials furnished under this specification shall be products that are authorized by the
qualifying activity for listing on the applicable qualified products list (QPL) before contract award (see 4.2 and 6.3).
3.2.1 Type I (unfaced panel). The basic material shall be flexible, cellular, homogeneous polyimide foam.
3.2.2 Type II (faced type I panel). Type II, Classes 1 and 2 materials shall be Type I foam with a fibrous glass
cloth facing as specified in 3.2.4. Type II, Class 3 material shall be Type I foam faced with primer coated
aluminized polyester/aluminum foil reinforced with a fibrous glass scrim as specified in 3.2.5. Type II, Class 4
material shall be Type I foam faced with primer coated aluminized polyester/aluminum foil reinforced with a fibrous
glass scrim laminated to a lightweight fibrous glass cloth as specified in 3.2.5. Type II, Class 5 material shall be
Type I foam faced with primer coated white polyester film reinforced with fibrous glass scrim as specified in 3.2.6.
3.2.3 Type III (preformed pipe) (flexible type I and rigid). Type III, Class 1 material shall be Type I flexible
foam. Type III, Class 2 material shall be Type I flexible foam prelagged with fibrous glass cloth as specified in
3.2.4. Type III, Class 3 material shall be 1.5 lb/ft³ (maximum) rigid, cellular, homogeneous polyimide foam.
Type III, Class 4 material shall be 1.5 lb/ft³ (maximum) rigid, cellular, homogeneous polyimide foam prelagged with
fibrous glass cloth as specified in 3.2.4. Type III, Class 5 material shall be 3 lb/ft³ (maximum) rigid, cellular,
homogeneous polyimide foam. Type III, Class 6 material shall be 3 lb/ft³ (maximum) rigid, cellular, homogeneous
polyimide foam prelagged with fibrous glass cloth as specified in 3.2.4.
3.2.4 Fibrous glass cloth facing. Fibrous glass cloth facing shall conform to the requirements of Type I, Class 2
of MIL-C-20079, and shall be free of wrinkles and other irregularities. Facing for Type II, Class 2 of this
specification shall be perforated with nominal 3/16-inch diameter holes on ½-inch centers (see figure 1).
3.2.5 Aluminized polyester/aluminum foil facing with a primer coated surface. Aluminized
polyester/aluminum foil facing shall consist of ½-mil thick aluminized polyester film with primer coated surface
laminated to a 1-mil thick aluminum foil backing. Type II, Class 3 material shall have a 4 yarns-per-inch by
3 yarns-per-inch (i.e., 4 x 3) fiberglass scrim adhered to the primer coated aluminized polyester/aluminum foil with
a fire-retardant thermosetting adhesive meeting the fire requirements of MIL-A-3316. Type II, Class 4 material
shall have fibrous glass cloth conforming to the requirements of Type I, Class 2 or Class 3 of MIL-C-20079 adhered
with a fire-retardant thermosetting adhesive meeting the fire requirements of MIL-A-3316 to the primer coated
aluminized polyester/aluminum foil reinforced with a fibrous glass scrim.
3.2.6 White polyester facing. White polyester facing shall consist of ½-mil thick white polyester film with
primer coated surface laminated to a 4 x 3 fiberglass scrim. The fiberglass scrim shall be adhered with a
fire-retardant thermosetting adhesive meeting the fire requirements of MIL-A-3316.
3.2.7 Adhesive (type II, all classes and type III, classes 2, 4, and 6). Adhesive for bonding the fibrous glass
cloth and the primer coated surface vapor resistant film to Type II, all classes and Type III, Classes 2, 4, and 6
materials shall conform to Class 1, Grade A of MIL-A-3316, or to the fire resistance requirements of MIL-A-3316.
Testing shall be as specified in 4.4.1.
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