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.
|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″|
|.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.