Product Description

Dynaflex® G7431-1001-00 is an easy processing, performance TPE designed for use in applications requiring a tough, durable material with a low coefficient of friction.


*Made with Kraton® Polymer

Features

-Excellent Tear Strength

-Superior Molded Aesthetics

-Overmold Adhesion to Polypropylene

-Excellent Heat Stability

-Good Ozone/UV Stability

Color

Natural

Processing Method

Injection Molding

Mechanical Properties English SI Test Method
Shore Hardness, 10 sec delay 66 A 66 A ASTM D2240
Specific Gravity 0.92 0.92 ASTM D792, 23/23°C
Tensile Strength 1330 psi 9170 kPa ASTM D412-Die C, 2hrs,23°C
Elongation at Break 610 % 610 % ASTM D412-Die C, 2hrs,23°C
100% Modulus 390 psi 2689 kPa ASTM D412-Die C, 2hrs,23°C
300% Modulus 600 psi 4137 kPa ASTM D412-Die C, 2hrs,23°C
Tear Strength 200 pli 35 kN/m ASTM D624
Thermal/Rheological Properties English SI Test Method
Melt Flow Rate @ 200°C, 5000g 2 g/10 min 2 g/10 min ASTM D 1238
Apparent Viscosity @ 200°C 11170/sec 13700 cPs 14 Pa-sec ASTM D 3835
Aged Properties English SI Test Method
Compression Set, 22 hrs @ RT 18 % 18 % ASTM D 395B
Coloring
Color concentrates with polypropylene (PP), ethylene vinyl acetate (EVA), or polyethylene (PE) carriers are most suitable for coloring Dynaflex® G7431-1001-00. Improved color dispersion can be achieved by using higher melt flow concentrates (with a melt flow from 25 - 40 g/10 min). Typical loadings for color concentrates are 1% to 5% by weight. Liquid color can be used, but mineral oil based carriers may have a significant effect on the final hardness value. Concentrates based on PVC should not be used. A high color match consistency can be obtained by using precolored compounds available from GLS. The final determination of color concentrate suitability should be determined by customer trials.

Purging
Purge thoroughly before and after use of this product with a low flow (0.5 - 2.5 MFR) polyethylene (PE) or polypropylene (PP).
Regrind
Regrind levels up to 20% can be used with Dynaflex® G7431-1001-00 with minimal property loss, provided that the regrind is free of contamination. To minimize losses during molding, the melt temperature should remain as low as possible. The final determination of the regrind effectiveness should be determined by the customer.
Shrinkage Properties English SI Test Method
Flow 0.009 - 0.015 in/in 0.009 - 0.015 mm/mm ASTM D 955
Residence Time
Dynaflex® G7431-1001-00 has excellent melt stability. Maximum residence times may vary, depending on the size of the barrel. Generally, the barrel should be emptied if it is idle for periods of 8 - 10 minutes or longer.
Drying Time English SI
Drying is not Required
Molding Temperatures English SI
Rear 340 - 370 °F 171 - 188 °C
Center 350 - 380 °F 177 - 193 °C
Front 360 - 430 °F 182 - 221 °C
Nozzle 370 - 430 °F 188 - 221 °C
Mold 60 - 100 °F 16 - 38 °C
Molding Parameters English SI
Screw Speed 40 - 100 rpm 40 - 100 rpm
Injection Speed 1 - 3 in/sec 25 - 76 mm/sec
1st Stage - Boost Pressure 250 - 800 psi 1724 - 5516 kPa
2nd Stage - Hold Pressure 30 % of Boost 70 % of Boost
Back Pressure 0 - 150 psi 0 - 1034 kPa
Hold Time (Thick Part) 3 - 10 sec 3 - 10 sec
Hold Time (Thin Part) 1 - 3 sec 1 - 3 sec