MMM-A-1617B
manufacture, unless approved by the activity responsible for qualification
(see 6.3).
3.2.3 Toxicity. The adhesive shall have no adverse effect on the
health of personnel when used for its intended purpose. Questions pertinent
to this effect shall be referred by the contracting activity to the
appropriate departmental medical service who will act as adviser to the
contracting agency. The manufacturer at time of qualification shall certify
that the adhesive contains no substance known to be toxic to the user under
normal conditions of use. Material safety data sheets shall be prepared and
submitted in accordance with FED-STD-313, one copy of which shall be forwarded
to the preparing activity of the specification and one copy to the qualifying
laboratory.
Physical properties.
3.3
3.3.1 Strip adhesion strength. The strip adhesion strength of the
adhesives shall conform to table I when tested as specified in 4.6.2.
3.3.2 Dead load (Type II only). Type II adhesives, when tested as
specified in 4.6.3, shall be capable of supporting a dead load of 0.9 kg (2
lbs) with no more than 1.27 cm (0.5 inch) creep or separation along the
adhesive layer. Only a cohesive mode creep within the adhesive layer shall be
acceptable.
Strip adhesion strength.
TABLE I.
Requirement
Test
Type I
Type II
Type III
As received kg. (lb.) min.
Aluminum to duck
5.4 (12)
6.8 (15)
4.5 (10)
Aluminum to polychloroprene
---
6.8 (15)
---
Aluminum to vinyl
---
---
3.6 (8)
After immersion kg. (lb.) min.
Aluminum to duck (water)
2.7 (6)
5.4 (12)
2.3 (5)
Aluminum to duck (oil)
---
5.4 (12)
3.6 (8)
---
---
Aluminum to duck (fuel)
3.6 (8)
After bond aging kg. (lb.) min.
Aluminum to duck
5.4 (12)
6.8 (15)
4.5 (10)
After accelerated storage kg.
(lb) min.
Aluminum to duck
4.5 (10)
5.4 (12)
3.6 (8)
3.3.3 Brushability. Adhesives shall be readily brushable. They shall
flow easily, spread evenly, and cover the surface adequately when applied as
specified in 4.6.4.
3.3.4 Accelerated storage. Adhesives stored as specified in 4.6.5
shall show no deterioration, gelling, settling, or separation of phases which
cannot be readily dispersed by manual stirring. After storage, they shall
meet the brushability requirements of 3.3.3 and strength requirements of
"after accelerated storage" in table I.
3.4
Shelf life.
The adhesives as furnished by the manufacturer shall
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