Xinhua Xu superior characteristics EPDMXinhua Xu superior characteristics EPDM O-rings

Features Xinhua Xu EPDM O-ring, mainly used in anti-aging requirements, water, corrosion resistance, electrical insulation in several areas.

Ethylene-propylene rubber, ethylene and propylene as the main raw material synthesis, aging resistance, electrical insulation properties and resistance to ozone can be highlighted hair. Ethylene-propylene rubber, chemical stability, abrasion resistance, flexibility, oil resistance, and styrene butadiene rubber close.

A, a, low density and high filling

Density EPDM O-ring is less of a rubber having a density of 0.87. Can be combined with a large number of oil-filled and a filler, which can reduce the cost of rubber, ethylene propylene rubber to make up for the shortcomings of high prices of raw rubber, and the value of high Mooney EPDM, a highly filled mechanical energy after a reduction little.

2, anti-aging

EPDM O-ring has excellent resistance to weather, ozone, heat, acid, water vapor, color stability, electrical properties, oil-filled sex and room temperature mobility. EPDM O-rings can be long-term use at 120 ?, can be transient or intermittent use at 150- 200 ? in. Adding a suitable antioxidant can increase its temperature. In peroxide crosslinking of EPDM rubber can be used under harsh conditions. EPDM O-rings in the ozone concentration 50pphm, drawing 30% of the conditions, not cracking up more than 150h.

3, corrosion resistance

Since the EPDM O-rings lack polar, unsaturated low, and thus a variety of polar chemicals such as alcohols, acids, alkalis, oxidizing agents, refrigerants, detergents, animal and vegetable oils, ketones and the like have good fat the resistance to; but in the case of aliphatic and aromatic solvents genus (such as gasoline, benzene, etc.) and mineral oil is less stable. In the long-term effect the performance of concentrated acid also decreased. Gathered in ISO / TO 7620 in nearly 400 kinds of corrosive gaseous and liquid chemical information on the role of the various properties of rubber, and the provisions of the 1-4 degree grade indicates its role, the impact of corrosive chemicals on rubber properties :

Level volume swelling ratio /% decrease hardness value on performance

1 <10 <10 little or no

210-20 <20 smaller

330-60 <30 Medium

4> 60> 30 serious

4, water vapor resistance

EPDM O-rings have excellent water vapor estimates is better than its performance and heat resistance. Superheated steam at 230 ?, no change in appearance after nearly 100h. The Viton O-rings, silicone rubber O-ring, fluoro silicone rubber O-ring, O-ring butyl rubber, nitrile rubber O-rings, natural rubber O-rings under the same conditions, experience occurred a short time appearance significant deterioration phenomenon.

5, resistance to hot water performance

EPDM O-ring resistance to hot water performance is also good, but is closely related with all curing systems. In morpholine disulfide, TMTD curing system for the ethylene-propylene rubber O-ring at 125 ? hot water for 15 months after the mechanical properties of very small, only 0.3% volume expansion.

6, electrical properties

EPDM O-ring has excellent electrical insulation and corona resistance, electrical performance is better than or close to styrene butadiene rubber, chlorosulfonated polyethylene, polyethylene, and cross-linked polyethylene.

7, the elastic

Because the molecular structure of EPDM in polar substituents, the molecule cohesive energy is low, the molecular chain can maintain compliance over a wide range, second only to natural questionable butadiene rubber, and at low temperatures can still maintain.

8, the adhesive

EPDM O-ring molecular structure lack of active groups, cohesive energy is low, coupled with rubber easy-blooming, self-adhesive and mutual viscosity is poor.

http://www.xhx168.com/

http://www.o-ringswx.cn/

Shenzhen XinhuaXu Rubber Products Co., Ltd

Greeting Tin Sum Shenzhen Jintian Road community after No. 350

Shenzhen Xu Xinhua Rubber Products Co., Ltd. O-rings

Features Xinhua Xu EPDM O-ring, mainly used in anti-aging requirements, water, corrosion resistance, electrical insulation in several areas.

Ethylene-propylene rubber, ethylene and propylene as the main raw material synthesis, aging resistance, electrical insulation properties and resistance to ozone can be highlighted hair. Ethylene-propylene rubber, chemical stability, abrasion resistance, flexibility, oil resistance, and styrene butadiene rubber close.

A, a, low density and high filling

Density EPDM O-ring is less of a rubber having a density of 0.87. Can be combined with a large number of oil-filled and a filler, which can reduce the cost of rubber, ethylene propylene rubber to make up for the shortcomings of high prices of raw rubber, and the value of high Mooney EPDM, a highly filled mechanical energy after a reduction little.

2, anti-aging

EPDM O-ring has excellent resistance to weather, ozone, heat, acid, water vapor, color stability, electrical properties, oil-filled sex and room temperature mobility. EPDM O-rings can be long-term use at 120 ?, can be transient or intermittent use at 150- 200 ? in. Adding a suitable antioxidant can increase its temperature. In peroxide crosslinking of EPDM rubber can be used under harsh conditions. EPDM O-rings in the ozone concentration 50pphm, drawing 30% of the conditions, not cracking up more than 150h.

3, corrosion resistance

Since the EPDM O-rings lack polar, unsaturated low, and thus a variety of polar chemicals such as alcohols, acids, alkalis, oxidizing agents, refrigerants, detergents, animal and vegetable oils, ketones and the like have good fat the resistance to; but in the case of aliphatic and aromatic solvents genus (such as gasoline, benzene, etc.) and mineral oil is less stable. In the long-term effect the performance of concentrated acid also decreased. Gathered in ISO / TO 7620 in nearly 400 kinds of corrosive gaseous and liquid chemical information on the role of the various properties of rubber, and the provisions of the 1-4 degree grade indicates its role, the impact of corrosive chemicals on rubber properties :

Level volume swelling ratio /% decrease hardness value on performance

1 <10 <10 little or no

210-20 <20 smaller

330-60 <30 Medium

4> 60> 30 serious

4, water vapor resistance

EPDM O-rings have excellent water vapor estimates is better than its performance and heat resistance. Superheated steam at 230 ?, no change in appearance after nearly 100h. The Viton O-rings, silicone rubber O-ring, fluoro silicone rubber O-ring, O-ring butyl rubber, nitrile rubber O-rings, natural rubber O-rings under the same conditions, experience occurred a short time appearance significant deterioration phenomenon.

5, resistance to hot water performance

EPDM O-ring resistance to hot water performance is also good, but is closely related with all curing systems. In morpholine disulfide, TMTD curing system for the ethylene-propylene rubber O-ring at 125 ? hot water for 15 months after the mechanical properties of very small, only 0.3% volume expansion.

6, electrical properties

EPDM O-ring has excellent electrical insulation and corona resistance, electrical performance is better than or close to styrene butadiene rubber, chlorosulfonated polyethylene, polyethylene, and cross-linked polyethylene.

7, the elastic

Because the molecular structure of EPDM in polar substituents, the molecule cohesive energy is low, the molecular chain can maintain compliance over a wide range, second only to natural questionable butadiene rubber, and at low temperatures can still maintain.

8, the adhesive

EPDM O-ring molecular structure lack of active groups, cohesive energy is low, coupled with rubber easy-blooming, self-adhesive and mutual viscosity is poor.

http://www.xhx168.com/

http://www.o-ringswx.cn/

Shenzhen XinhuaXu Rubber Products Co., Ltd

Greeting Tin Sum Shenzhen Jintian Road community after No. 350

Shenzhen Xu Xinhua Rubber Products Co., Ltd.