GENERAL SPECIFICATIONS FIBREFLEX GRADE A
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 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. |
| Recovery | 40% minimum | |
| 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: 250 °F
FIBREFLEX is an insoluble, impregnated, strong & flexible high-grade fiber.