Product Description

Dynalloy® OBC8000-T40 is an easy processing, general processing TPE utilizing the unique rubber properties of Dow INFUSE™ Olefin Block Copolymers. Designed for a wide variety of applications, including applications requiring FDA compliances

Features

-Excellent Colorability

-Adhesion to Polypropylene

-Warm, Non-tacky, Rubbery

-Enhanced Flow

Color

Translucent

Processing Method

Extrusion, Injection Molding

Mechanical Properties English SI Test Method
Shore Hardness, 10 sec delay 40 A 40 A ASTM D2240
Specific Gravity 0.88 0.88 ASTM D792, 23/23°C
Tensile Strength 495 psi 3413 kPa ASTM D412-Die C, 2hrs,23°C
Elongation at Break 840 % 840 % ASTM D412-Die C, 2hrs,23°C
100% Modulus 160 psi 1103 kPa ASTM D412-Die C, 2hrs,23°C
300% Modulus 245 psi 1689 kPa ASTM D412-Die C, 2hrs,23°C
Thermal/Rheological Properties English SI Test Method
Apparent Viscosity @ 200°C 1341/sec 39100 cPs 39 Pa-sec ASTM D 3835
Apparent Viscosity @ 200°C 11170/sec 8600 cPs 9 Pa-sec ASTM D 3835
Coloring
Color concentrates with polypropylene (PP), ethylene vinyl acetate (EVA), or low density polyethylene (LDPE) carriers are most suitable for coloring Dynalloy® OBC8000-T40. 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) polystyrene (PS) or polypropylene (PP).
Regrind
Regrind levels up to 20% can be used with Dynalloy® OBC8000-T40 with minimal property loss, provided that the regrind is free of contamination. To minimize losses during molding, the melt tempetature should remain as low as possible. The final determination of regrind effectiveness should be determined by the customer.
Residence Time
Dynalloy® OBC8000-T40 has good 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 330 - 370 °F 166 - 188 °C
Center 350 - 390 °F 177 - 199 °C
Front 390 - 430 °F 199 - 221 °C
Nozzle 390 - 430 °F 199 - 221 °C
Melt 380 - 440 °F 193 - 227 °C
Mold 80 - 100 °F 27 - 38 °C
Molding Parameters English SI
Screw Speed 50 - 100 rpm 50 - 100 rpm
Injection Speed 1 - 3 in/sec 25 - 76 mm/sec
1st Stage - Boost Pressure 200 - 900 psi 1379 - 6205 kPa
2nd Stage - Hold Pressure 20 % of Boost 40 % of Boost
Back Pressure 0 - 80 psi 0 - 552 kPa
Hold Time (Thick Part) 4 - 10 sec 4 - 10 sec
Hold Time (Thin Part) 1 - 4 sec 1 - 4 sec