Founded in 2002, Dowhon
Group is a modern management enterprise integrating R&D, Production, Sales and Service, headquartered in Chengdu National Industrial Park- Meishan Jinxiang Chemical Industrial Park.
Dowhon currently has 10 sets
of fluoroelastomer precompound and compound production lines with total production capacity over 8,000 tons/year. We also have a 100,000 class purification workshop with 3 production lines specializing in the production of fluoroelastomer compound for smart wearable devices, annual production capacity over 3,000 tons/year. A 10,000 class purification workshop specializing in the production of FFKM rubber parts
for semiconductors,
aerospace,etc.
Dowhon always insist
s
on bring
ing
in the world's leading technology and gathering high-tech talents.
W
e have gathered a large number of local and foreign high-end technical talents in the fields of production, R&D, and sales.
To support our business, Dowhon built
specialized
in
FFKM R&D laboratory, smart wearable engneering
center
and a extrusion application of fluoroelastomer research laboratory, etc.
We are strictly controlled under IATF 16949:2016, GB/T 28001-2011,GB/24001-2004.
Our
products are widely used in
the automotive indus
tr
y,
semiconductor, consumer electronics, aerospace, chemical and other fields
, and are also irreplaceable key
materials in the cutting-edge defense industry.
Our products are sold to many domestic provinces and cities, and also exported to more than 30 countries and regions such as Europe, America, South Korea, Japan, Southeast Asia
, the
Middle East and etc...

HNBR is a type of synthetic rubber. It is made by adding hydrogen to nitrile butadiene rubber (NBR).
NBR is a common rubber that contains acrylo-nitrile content which gives it good chemical resistance. However, NBR is prone to swelling and poor aging resistance from heat and oils.
By adding hydrogen, the double bonds in the NBR are saturated. This process is called hydrogenation. Hydrogenation improves the heat and oil resistance of the rubber.
HNBR has better physical properties compared to NBR. It has high tensile strength and is more resistant to compression set. It can withstand higher temperatures for longer periods without deteriorating.
HNBR has excellent resistance to petroleum oils, greases and many chemicals. It is not attacked by aliphatic, aromatic and chlorinated hydrocarbons.
Due to these advantages, HNBR is often used in oil seals, gaskets, hoses, O-rings and other mechanical rubber products that require heat and chemical resistance. It is commonly used in automotive and industrial applications.
Product Parameters
Grades details:

Application:
Hydrogenated nitrile is a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). Superior mechanical characteristics, particularly high
strength, helps reduce extrusion and wear.
Packaging And Storage:
Packed
in
cartons
lined
with
plastic
bags, 20kg/box. Store
in
a
cool, dry, well ventilated place, away from strong oxidants. Avoid
contact
with
strong
acid, alkali and
metal
lead.Transport
as
non
dangerous
goods. Handle
with
care
to
prevent package
damage. During
transportation, it
shall
be
rain
proof, moisture
-proof,
sun
proof
and
prevent
acid, alkali
and
other
impurities
from
penetrating

In
the
unopened
original
package, it
shall
be
stored
for
24 months
from
the date of production under
40 ºC .

ISO9001, ISO14001, ISO16949Currently has 65 patents, 15 invention patents are under application, participated in the formulation of 4 National Standards.
Currently has 65 patents, 15 invention patents are under application, participated in the formulation of 4 National Standards.

1, What's your MOQ?
By air MOQ is 20-25KG, by sea MOQ is 100KG.
2, What's your delivery time?
For stock goods, we can arrange delivery within 3 working days, otherwise delivery time is around 7-14 working days.
3, What's your package?
Usually goods are
packaged with PE film in carton. The weight is 20-25kg net per carton. 500kgs/625kgs/700kgs
in a pallet.
4, How can we select the exactly grade which suit for our usage?
Please contact our sales, we'll recommend suitable grade according to your typical physical properties and other related information.