uncured compounding Hydrogenated Nitrile Rubber

Product Overview

Description

High quality o ring gasket hose  HNBR hnbr 70 seals  black compound

 

 

Description:

Hydrogenated nirtrile results from the hydrogenation of standard nitrile. Hydrogenated Nitrile Rubber main chain is primarily composed of highly saturated hydrocarbons and acrylonitrile( CAN). Thanks to their saturation, the hydrocarbon segments impart heat, chemical, and ozone resistance.

Keep in mind that increased hydrogenation also leads to decreased low temperature elasticity. As with standard nitrile, the CAN content of HNB imparts toughness, as well as fuel and oil resistance.

This ACN content can be modified for specific uses. There are also a few remaining unsaturated butadiene segments ( typically well under 10% ) to facilitate peroxide curing or in some instances, sulfur vulcanization.

Peroxide- cured Hydrogenated Nitrile Rubber has improved thermal properties and will not continue to vulcanize like sulfur-cured nitriles.

HNBR is also finding wider use as and alternative to fluoroelastomer rubber (FKM) in shaft seals. Why the switch?

The hardness of the mineral fillers- primarily calcium sulfate (CaSO4) and barium sulfite (BaSO3)-used to improve fluorcarbon`s wear properties can cause grooving of the metal shaft, eventually providing a leak path that leads to seal failure.

With other materials, carbon black ( Which is not as abrasive as the mineral fillers ) might be substituted, but carbon black is not sufficient to give fluorocarbon good abrasion resistance. On the other hand,HNBR has excellent abrasion resistance, making it a viable alternative to FKM.

Hydrogenated Nitrile Rubber also has better low temperature properties and tear resistance than fluorocarbon.

General temperature range: -25F to 300℉

HNBR performs well in :

 Automotive applications

( as O rings, timing belts, fuel injector seals, fuel hose, shaft seals, diaphragms, and in air conditioning systems )

 Oil fields and applications

( as O rings, well-hand seals,drill-bit seals, packers,drill-pipe protectors)

Compression Molding HNBR Compound
Description:		ES1290: Designed for o ring gasket or other compression molding products which used in oil and machinery industries with good compression set and good flowability.
Press cure:170  ℃*  20 min		Post cure:200℃*4hrs
Typical Properties		Unit	Test Methods	Value
Hardness		Shore A	D-2240	92
Tensile strength		Mpa	D-412	23
Elongation		%	D-412	135
Compression set	150℃*70 hrs	%	D-395B	23
Aging test(  150℃@  70 hrs)
Hardness change		Shore A	D-573	+4
Tensile strength change		%	D-573	+4.7
Elongation change		%	D-573	-22.6
IRM 901# Oil resistance(150 ℃@  70 hrs)
Hardness change		Shore A	D-471	-2
Tensile strength change		%	D-471	-1.1
Elongation change		%	D-471	-7
Volume change		%	D-471	+10
IRM 903# Oil resistance(150 ℃@  70 hrs)
Hardness change		Shore A	D-471	-7
Tensile strength change		%	D-471	-2
Elongation change		%	D-471	-19.5
Volume change		%	D-471	+10

Hydrogenated Nitrile Rubber Final Products:

Tube, valve seal, shaft seal, gaskets, o rings

Hydrogenated Nitrile Rubber Feature:

Excellent Heat Resistance

Oxidation Resistance

Oil Resistance

Corrosion Resistance

Atmospheric aging Resistance

Low temperature resistance

Electrical Insulation

Radiation Resistance

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