Product Description

Dynaflex® G6730 is an easy processing TPE designed for use in injection molding and extrusion applications where an extremely soft feel is desired.


*Made with Kraton® Polymer

Features

-Ultra Soft Touch

-Rubbery Feel

-Excellent Colorability

-Overmold Adhesion to Polypropylene

-Good Elastic Memory

Color

Translucent

Processing Method

Extrusion, Injection Molding

Mechanical Properties English SI Test Method
Shore Hardness, 10 sec delay 30 A 30 A ASTM D2240
Specific Gravity 0.91 0.91 ASTM D792, 23/23°C
Tensile Strength 740 psi 5102 kPa ASTM D412-Die C, 2hrs,23°C
Elongation at Break 530 % 530 % ASTM D412-Die C, 2hrs,23°C
100% Modulus 110 psi 758 kPa ASTM D412-Die C, 2hrs,23°C
300% Modulus 360 psi 2482 kPa ASTM D412-Die C, 2hrs,23°C
Tear Strength 80 pli 14 kN/m ASTM D624
Thermal/Rheological Properties English SI Test Method
Melt Flow Rate @ 200°C, 5000g 6 g/10 min 6 g/10 min ASTM D 1238
Apparent Viscosity @ 200°C 11170/sec 10200 cPs 10 Pa-sec ASTM D 3835
Aged Properties English SI Test Method
Compression Set, 22 hrs @ RT 12 % 12 % ASTM D 395B
Coloring
Color concentrates with polypropylene (PP), ethylene vinyl acetate (EVA), or polyethylene (PE) carriers are most suitable for coloring Dynaflex® G6730. 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® G6730 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 regrind effectiveness should be determined by the customer.

Shrinkage Properties English SI Test Method
Flow 0.040 - 0.044 in/in 0.040 - 0.044 mm/mm ASTM D 955
Residence Time
The Dynaflex® G6730 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 275 - 360 °F 135 - 182 °C
Center 330 - 380 °F 166 - 193 °C
Front 340 - 390 °F 171 - 199 °C
Nozzle 340 - 400 °F 171 - 204 °C
Mold 60 - 80 °F 16 - 27 °C
Molding Parameters English SI
Screw Speed 25 - 75 rpm 25 - 75 rpm
Injection Speed 1 - 3 in/sec 25 - 76 mm/sec
1st Stage - Boost Pressure 300 - 800 psi 2068 - 5516 kPa
2nd Stage - Hold Pressure 30 % of Boost 70 % of Boost
Back Pressure 0 - 110 psi 0 - 758 kPa
Hold Time (Thick Part) 3 - 10 sec 3 - 10 sec
Hold Time (Thin Part) 1 - 3 sec 1 - 3 sec