Audited Supplier
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 insists on bringing in the world's leading technology and gathering high-tech talents. We 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 industry, 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.
| Original Property/ | |||||||
| Z1 | Hardness,Shore-A/, ASTM D2240, pts | 90±5 | 90 | pass | |||
| Specific Gravity/,ASTM D297, g/cm3 | 1.281 | N/A | |||||
| Modulus 100%/100% ,ASTM D412 C , Mpa | 14.4 | N/A | |||||
| Tensile strength/,ASTM D412 C ,Mpa,min | 20 | 27 | pass | ||||
| Z2 | Ultimate elongation/,ASTM D412 C, %,min | 100 | 201 | pass | |||
| A26 | Heat Aging/,ASTM D865:/150ºCX70Hrs | ||||||
| Hardness change/,pts,Shore-A | +10 | +5 | pass | ||||
| Tensile strength change/,% | -25 | -6.3 | pass | ||||
| Ultimate elongation change/,%,max | -30 | -8.5 | pass | ||||
| B16 | Compression Set/ ,ASTM D395 Method B,Type 1 A /150ºCX22Hrs, | ||||||
| Deflection,%,max | 30 | 18.6 | pass | ||||
| EO16 | Fluid resistance,test methods ASTM D471,IRM901 oil 100ºCx70hrs | ||||||
| Hardness change/,pts,Shore-A | -5~+10 | +2 | pass | ||||
| Tensile strength change/,% | -20 | -8.8 | pass | ||||
| Ultimate elongation change/,%,max | -30 | +8 | pass | ||||
| volume Change,%,MAX | ±5 | -2.2 | pass | ||||
| EO36 | Fluid resistance,test methods ASTM D471,IRM903 oil 100ºCx70hrs | ||||||
| Hardness change/,pts,Shore-A | -15 | -6 | pass | ||||
| Tensile strength change/,% | -40 | -9.6 | pass | ||||
| Ultimate elongation change/,%,max | -40 | -10.6 | pass | ||||
| volume Change,%,MAX | +25 | +9 | pass | ||||
| Z5 | Low-Temperature resistance,,ASTM D 1329 | ||||||
| TR10 | -17 | N/A | |||||
| Test Sample Cure Parameter/ | |||||||
| Test Slab Size/:130x90x2mm Test Button Size/ :Φ29x12.5mm | |||||||
| Test Slab Press Curing/:177ºCx10min Test Button Press Curing/:160ºCx30min | |||||||
| Test Slab Post Curing/:150ºCX4hrs Test Button Post Curing/:150ºCx4hrs | |||||||
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
Shelf Life:
In the unopened original package, it shall be stored for 24 months from the date of production under 40 ºC .
ISO9001, ISO14001, ISO16949
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.
