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Density

1.75

g/cm3

Molding Shrinkage

0.10 to 0.30

%

Water Absorption (73°F, 24 hr)

0.15

%

Moisture Absorption - Equil, 65% RH

1.3

%

Tensile Modulus

2.90E+6

psi

Tensile Stress (Break)

33400

psi

Tensile Strain (Break)

1.9

%

Flexural Modulus

2.90E+6

psi

Flexural Stress (73°F)

49300

psi

Notched Izod Impact

1.8

ft·lb/in

Unnotched Izod Impact

13

ft·lb/in

Heat Deflection Temperature (264 psi, Unannealed)

446

°F

CLTE - Flow

9.4E-6

in/in/°F

Volume Resistivity

> 1.0E+13

ohms·cm

Electric Strength

740

V/mil

Dielectric Constant (110 Hz)

4.10

Dissipation Factor (110 Hz)

0.012

Comparative Tracking Index

400

V

Flame Rating

Glow Wire Flammability Index

Glow Wire Ignition Temperature

Oxygen Index

32

%

Drying Temperature

248

°F

Drying Time

0.50 to 1.5

hr

Rear Temperature

482 to 500

°F

Front Temperature

500 to 554

°F

Processing (Melt) Temp

518

°F

Mold Temperature

248 to 284

°F

Injection Rate

Fast

Hot Runners: 250°C to 260°C (482°F to 500°F)

Storage
Ixef? compounds are shipped in moisture-resistant packages at moisture levels according to specifications. Sealed, undamaged bags should be preferably stored in a dry room at a maximum temperature of 50°C (122°F) and should be protected from possible damage. If only a portion of a package is used, the remaining material should be transferred into a sealable container. It is recommended that Ixef? resins be dried prior to molding following the recommendations found in this datasheet and/or in the Ixef? processing guide.

Drying
The material as supplied is ready for molding without drying. However, If the bags have been open for longer than 24 hours, the material needs to be dried. When using a desiccant air dryer with dew point of -28°C (-18°F) or lower, these guidelines can be followed: 0.5-1.5 hour at 120°C (248°F), 1-3 hours at 100°C (212°F), or 1-7 hours at 80°C (176°F).

Injection Molding
IXEF 1521 compound can be readily injection molded in most screw injection molding machines. A general purpose screw is recommended, with minimum back pressure.

The measured melt temperature should be about 270°C (518°F), and the barrel temperatures should be around 250°C to 260°C (482°F to 500°F) in the rear zone, gradually increasing to 260°C to 280°C (500°F to 536°F) in the front zone. If hot runners are used, they should be set to 250°C to 260°C (482°F to 500°F).

To maximize crystallinity, the temperature of the mold cavity surface must be held between 120°C and 140°C (248°F and 284°F). Molding at lower temperatures will produce articles that may warp, have poor surface appearance, and have a greater tendency to creep. Set injection pressure to give rapid injection. Adjust holding pressure and hold time to maximize part weight. Transfer from injection to hold pressure at the screw position just before the part is completely filled (95%-99%).