HCR 1670 U is a silicone master-batch, heat curing after the addition of a vulcanizing agent (chosen according to the processing method).
Details
HEAT CURED SILICONE RUBBER HCR 1670 U
Description: HCR 1670 U is a silicone master-batch, heat curing after the addition of a vulcanizing agent (chosen according to the processing method).
Applications: HCR 1670 U is recommended for moulding, has good compromise of mechanical properties.
Special properties:
Easy to process, non-stick to rollers,un- easy to release
Good mechanical properties
Good heat stability, up to 200°C
Wide possibilities for blending with other master batch.
Characteristics:
Type (in accordance with GB/T 5576-1997) ………………………………………… VMQ
Density at 25°C, g/cm3, approx…………………………………………………………… 1.23
Natural color………………………………………………………………………………………… translucent
Properties after working
After addition of 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane at 45%, and vulcanization for 5 minutes at 175℃.
1. Mechanical property:
1.1 Properties before post-cure
Shore A hardness, approx………………………………………………… 71
Tensile strength, MPa, approx………………………………………… 7.9
Elongation at break, %, approx…………………………………… …. 346
Modulus at 100% elongation, MPa, approx………………………. 2.91
Tear strength, (ASTM D 624 Die B)kN/m, approx…………………. 16
Rebound resilience, %, approx……………………………………………… 44
2. Properties after post-cure for 4 hours at 200°C
Shore A hardness, approx…………………………………………………… 73
Tensile strength, MPa, approx…………………………………………….. 7.6
Elongation at break, %, approx…………………………………………… 288
Modulus at 100% elongation, MPa, approx………………………… 3.06
Tear strength (ASTM D 624 Die B)，kN/m, approx……………… 13
Rebound resilience, %, approx…………………………………………… 42
Notes: The technical data listed in the table as a typical performance, can not be used as a technical parameter for HCR 1670 U special applications.
Packaging: HCR 1670 U is delivered in 20 kg carton boxes.
Storage and shelf life: HCR 1670 U may be stored in its original unopened packaging at a temperature below 40°C for up to 6 months from the date of manufacture marked clearly on the packaging.
Past this date, no longer guarantees that the product meets the sales specifications.
