A. SCOPE: FIBREFLEX GRADE "A" is a premium grade of vegetable fibre sheet packing,efficiently saturated with a glue-
glycerine impregnant rendered insoluble by means of a tanning agent (formaldehyde) to give a strong, flexible, all-proof
packing with properties retained during proper storage and in use.
B. CERTIFICATION: FIBREFLEX GRADE "A" is certified to meet the below listed specifications:
- HH-P-96G, Type 1 only (Federal Specification)
- MIL-G-12803A Ident. No. P3313B
- MIL-G-128030B & MIL-G-12803C Ident. No. F326128M6
- ASTM D 1170 and SAE J90 Ident. No. P3313B
- ASTM F 104 and SAE J90 Ident. No. F326128-E21-M6
- Underwriters' Laboratory Listing No. MH 4649 (763N)
C. PHYSICAL CHARACTERISTICS:
- Fibre 45% to 55%
- Moisture 6% to 10%
- Chemical Solids 35% to 45%
D. CONDITIONING: All samples conditioned prior to testing as specified by applicable application--usually 50%
RH -70 to 85o F for a period of 22 or 24 hours.
E. STANDARDS: (Using American Society of Testing Materials Specification ASTM F 104 prepared jointly with the
Society of Automotive Engineers and similar in requirements to MIL-G-12803C.
ORIGINAL Test Load 1000p.s.i.
PHYSICAL Compressibility 25% to 40%
PROPERTIES Tensile Strength 2000 p.s.i.
PHYSICAL Fuel B--Thickness increase 5% maximum (Not Applicable to MIL-G-12803C)
PROPERTIES #3 Oil--Thickness increase 5% maximum
AFTER Fuel B--Weight increase 15% maximum (Not Applicable to MIL-G-12803C)
IMPRESSION #3 Oil--Weight increase 15% maximum
Water--Weight increase 100% maximum
F. THICKNESS TOLERANCES:
Thickness Plus or Minus
.006", .010" and .015" .0035"
.021", .031", .046" and .062" .005"
.096" (3/32") .008"
.125" (1/8") and up .016"
G. FLEXIBILITY: FIBREFLEX GRADE "A" is capable of withstanding bending around a rod with a diameter of twice the
thickness of the material under test, without cracking, breaking, or excessive marring of the surfaces.
H. TEMPERATURE LIMIT: 250o F
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