Product Description

Dynalloy® OBC8000-T05 is an ultra-soft TPE utilizing the unique rubber properties of Dows INFUSE? Olefin Block Copolymers. This product is designed for injection molding applications where exceptional softness and overmolding to polypropylene is desired

New Product. Commercial specifications have not been established.

Features

-Excellent Colorability

-Adhesion to Polypropylene

-Ultra Soft

-Tactile Feel

-Enhanced Flow

Color

Translucent

Processing Method

Injection Molding

Mechanical Properties English SI Test Method
Shore Hardness, 10 sec delay 59 OO 59 OO ASTM D2240
Specific Gravity 0.87 0.87 ASTM D792, 23/23°C
Tensile Strength 160 psi 1103 kPa ASTM D412-Die C, 2hrs,23°C
Elongation at Break 1800 % 1800 % ASTM D412-Die C, 2hrs,23°C
Thermal/Rheological Properties English SI Test Method
Apparent Viscosity @ 200°C 1341/sec 40000 cPs 40 Pa-sec ASTM D 3835
Apparent Viscosity @ 200°C 11170/sec 7600 cPs 8 Pa-sec ASTM D 3835
Coloring
Color concentrates with Dynalloy® OBC8000-T05 as the carrier are most suitable for coloring this product. If a OBC8000-T05 color concentrate carrier is desired, it is important that the chosen color house have underwater pelletization capabilities. Typical loadings for color concentrates are 1% to 5% by weight. Liquid color (pigment, not dye) can be used; white oil carriers are recommended. A high color match consistency can be obtained by using precolored compounds available from GLS. Polypropylene (PP) based color concentrates are not recommended because they lead to poor dispersion and can significantly change the hardness of the material. 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) polystyrene (PS) or polypropylene (PP).
Regrind
Regrind levels up to 20% can be used with Dynalloy® OBC8000-T05 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-T05 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 300 - 340 °F 149 - 171 °C
Center 330 - 370 °F 166 - 188 °C
Front 350 - 390 °F 177 - 199 °C
Nozzle 360 - 420 °F 182 - 216 °C
Melt 360 - 420 °F 182 - 216 °C
Mold 60 - 90 °F 16 - 32 °C
Molding Parameters English SI
Screw Speed 80 - 120 rpm 80 - 120 rpm
Injection Speed 0.5 - 3 in/sec 13 - 76 mm/sec
1st Stage - Boost Pressure 200 - 700 psi 1379 - 4826 kPa
2nd Stage - Hold Pressure 20 % of Boost 50 % of Boost
Back Pressure 0 - 80 psi 0 - 552 kPa
Hold Time (Thick Part) 1 - 5 sec 1 - 5 sec
Hold Time (Thin Part) 1 - 3 sec 1 - 3 sec