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The problem of elongation at elongation at high hardness of raw material NBR and low temperature in the raw materials of silicone rubber tube
First, we must understand the raw material of silicone rubber tube before we understand the elongation at high hardness of NBR and the low temperature of raw material NBR..
Raw materials of silicone rubber tubes NBR
Hard: 87 + 5
Elongation at break: 250~650%
Intensity >6
The bending crack free of cold resistance 22h:-35
Air aging: changes in hardness: 94h/90 after air aging 0~+6A
Air aging: elongation: 94h/90 250-650%
Solvent resistance: 90 250~550% 48H
Solvent resistance: 90 degree oil 48h weight change -3~+8
The difficulty lies in the high hardness, air aging and oil after 48h. The elongation at break not satisfied.
Shenzhen odd margin to share: the formulation of the auxiliaries is not a lot of, resulting in resistance to oil and aging, the elongation decreased? This is also a reason. A little white carbon black, and black point can be achieved.
Difficulty in: the elongation at the high hardness of the raw material of silicone rubber tube and the problem of the low temperature of the elongation at NBR. It is suggested that the grade of carbon black is chosen, and the percentage of the percentage of carbon black is more than that of the carbon black, which has a great influence on the strength and elongation..
This paper is from Shenzhen, odd Silicone Rubber Co., Ltd.: id=429? Http://www.szhcty.com/news_v.asp
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