ASTM D 2116 FEP Resin Moulding & Extrusion Materials

Scope:

According to the ASTM D 2116 standard specification, materials must have a homogeneous composition and correspond to its requirements. They must also be completely free of extraneous substances. 

Test Procedure:

ASTM D 2116 standard specification using below test method below:

Test method’s guiding principle: At 372 6 1°C, the melt flow rate is calculated using either Procedure A or B from Test Method D1238. Test Method D1238, which describes the extrusion plastometer to be used, has been updated by using corrosion-resistant alloy for the barrel lining, orifice, piston tip, and orifice securing device. Use pellets or pieces cut from moulded or extruded forms that are around the same size. Additionally, strips measuring 6 mm (14 in) x 76 mm (3 in) long load easily into the barrel.

Determine the substance’s specific gravity. a specimen that was blanked or sliced from the moulded plaque (Section 8) and measured approximately 25.4 by 38 mm (1 by 1.5 in. The steps outlined in Test Methods D792. 2 drips added adding a wetting chemical to the water to lessen the surface tension maintain tension and make sure the specimen is completely soaked.

Thermodynamic Melting Characteristics—To make this determination, employ differential scanning calorimetry (DSC), by Test Method D4591. The test must be performed on a 10 6 2-mg specimen taken from a resin pellet that has been sold or received for specification reasons. It must be heated at a rate of 10 土1°C (18 土 1.8°F) per minute. On rare occasions, the initial melting test shows two peaks. The peak temperatures in this situation must be stated as Tu for the upper temperature and Tl for the lower temperature. If a single number is required, the melting point of the peak with the greatest height must be recorded. If a peak temperature can’t be easily identified from the curves, or if it’s rounded.

Tensile Properties: The die must have a 5 土0.5 mm (0.2–0.6 in.) (0.2–0.02 in.) curve and be made of steel or solid metal. The test results are averaged. Determine the tensile properties by Test Method D638, with the exception that the specimens used must follow Section 8’s specifications, the initial jaw separation must be 22.2 mm (0.875 mm), and the testing speed must be 50 mm (2.2 in) per minute.

Test Specimen:

Utilizing ASTM D 2116 standard specification Create a molded sheet that is 0.060 to 0.010 inches (1.5 to 0.3 mm) thick. To create the needed sheet, use a picture-frame-style chase with an appropriate blanked-out part and thickness. Put a piece of clean, 0.13 to 0.18 mm (0.005 to 0.007 in) thick aluminium foil in contact with the resin.

Data:

Standard Specification ASTM D 2116  Using the chart, calculate the elongation and express it as a percentage of the initial jaw separation.

                               Elogation,% = load22.2 or 0.875m

where:

d = distance on the chart, mm (in.),

m = chart speed magnification,

22.2 = factor when d is in millimetres, or

When d is given in inches, the factor equals 0.875.

Conclusion:

To ensure the correct production and application of FEP resin, it is essential to follow the requirements provided in ASTM D 2116 Standard Specification for FEP Resin Molding and Extrusion Materials and calculate the elongation.