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Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® HR8740
SiSiB® HR8740

SiSiB® HR8740 is an economic high tear strength fumed silicone rubber designed for molding applications. It offers excellent durability and tear resistance, making it ideal for creating robust molds that can withstand repeated use.

SiSiB® HR8740

Features


  • Excellent transparency and mechanical properties.

  • Stable processability

  • Good yellowing resistance

  • Available in 30, 40, 50, 60, and 70 durometer grades

  • Complies with FDA regulations


Physical Properties


Property

Value

Method

Appearance

Transparent


Density (g/cm3)

1.09-1.15

ASTM D792




After curing



Hardness (Shore A)

40+/-2

ASTM D2240

Tensile Strength (MPa)

Min. 8.5

ASTM D412

Elongation (%)

Min. 500

ASTM D412

Tensile Set (%)

Max. 8.0

ASTM D412

Tear Strength (KN/m)

Min. 30.0

ASTM D624

Rebound Resilience (%)

Min. 45.0





After post-curing



Hardness (Shore A)

45+/-2

ASTM D2240

Tensile Strength (MPa)

Min. 7.5

ASTM D412

Elongation (%)

Min. 450

ASTM D412

Tear Strength (KN/m)

Min. 18.0

ASTM D624

Curing Condition


Curing Agent

2,5-Dimethyl-2,5-di(tert-butylperoxy) hexane

Curing Agent Content

0.65%

Cure

175°C / 5min

Post-cure

200°C / 4h


Application


  • SiSiB® HR8740 provides superior flexibility, resilience, and ease of handling, ensuring reliable performance in various industrial molding processes. It is a cost-effective solution for applications that require both high strength and long-lasting performance.

Packing and Storage


SiSiB® HR8740 is supplied in 20Kg box, with plastic bag inside.


In the unopened original container, SiSiB® HR8740 has a shelf life of one year in a dry and cool place.

Documents

DownloadSiSiB® HR8740 Safety Data Sheet
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SiSiB® HR8740