Product Description

Dynaflex® G7940-1001-00 is an easy processing, general purpose TPE designed for a wide variety of applications, including those where FDA compliance is required.

*Made with Kraton® Polymer

Features

-Soft Touch, Rubbery Feel

-Non-Slip Grip

-Overmold Adhesion to Polypropylene

-Automotive FMVSS 302

Color

Natural

Processing Method

Extrusion, Injection Molding

Mechanical Properties English SI Test Method
Shore Hardness, 10 sec delay 40 A 40 A ASTM D2240
Specific Gravity 1.18 1.18 ASTM D792, 23/23°C
Tensile Strength 450 psi 3103 kPa ASTM D412-Die C, 2hrs,23°C
Elongation at Break 450 % 450 % ASTM D412-Die C, 2hrs,23°C
100% Modulus 180 psi 1241 kPa ASTM D412-Die C, 2hrs,23°C
300% Modulus 380 psi 2620 kPa ASTM D412-Die C, 2hrs,23°C
Tear Strength 100 pli 18 kN/m ASTM D624
Thermal/Rheological Properties English SI Test Method
Melt Flow Rate @ 200°C, 5000g 3 g/10 min 3 g/10 min ASTM D 1238
Apparent Viscosity @ 200°C 11170/sec 8800 cPs 9 Pa-sec ASTM D 3835
Aged Properties English SI Test Method
Compression Set, 22 hrs @ RT 12 % 12 % ASTM D 395B
Electrical/Flammability Properties Value Test Method
Flame Rating 1.5 mm HB UL 94
Regulatory Information Yes/No
FDA Yes
Coloring
Color concentrates with polypropylene (PP), ethylene vinyl acetate (EVA), or low density polyethylene (PE) carriers are most suitable for coloring Dynaflex® G7940-1001-00. 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. Concentrates based on PVC should not be used. 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® G7940-1001-00 with minimal property losses, provided that the regrind is free of contamination. To minimize losses during molding, the melt temperature should be as low as possible. The final determination of regrind effectiveness should be determined by the customer.
Shrinkage Properties English SI Test Method
Flow 0.013 - 0.021 in/in 0.013 - 0.021 mm/mm ASTM D 955
Residence Time
The Dynaflex® G7940-1001-00 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 320 - 370 °F 160 - 188 °C
Center 350 - 380 °F 177 - 193 °C
Front 360 - 410 °F 182 - 210 °C
Nozzle 380 - 420 °F 193 - 216 °C
Mold 60 - 100 °F 16 - 38 °C
Molding Parameters English SI
Screw Speed 25 - 100 rpm 25 - 100 rpm
Injection Speed 1 - 3 in/sec 25 - 76 mm/sec
1st Stage - Boost Pressure 175 - 800 psi 1207 - 5516 kPa
2nd Stage - Hold Pressure 30 % of Boost 70 % of Boost
Back Pressure 0 - 100 psi 0 - 689 kPa
Hold Time (Thick Part) 3 - 10 sec 3 - 10 sec
Hold Time (Thin Part) 1 - 3 sec 1 - 3 sec