Qingdao Xincheng Rubber Products Co., Ltd,
Add: No.288, 204 National Road, Jimo of Qingdao City, China
Tel：+86-532-88526547 
Fax：+86-532-86539177
E-mail：sales@chinaxcxj.com 
Web：www.chinaxcxj.com 
Marine Rubber Airbag's Performance Curves:
1. Initial Internal Pressure:
Air pressure that fully inflates the airbag before compression ( See Figure 1, D). When the airbags are compressed by ship’s weight and its diameter will make a change. At the same time, airbag’s internal pressure will increase with its compression rate.
Figure 1. An airbag being compressed
2. Percentage deformation:
Ratio of the deformed height to the original diameter of the airbag while the airbag is being compressed.
The compression rate can be calculated using formula (See Figure 1):
P = (D-H) /D
Where
P = the percentage deformation (%)
D=the original diameter of the airbag (m)
H= the height of the compressed airbag (m)
X = compress deformation Y= internal compress (kPa)
1= initial pressure 2= rated working pressure
Figure 2. – The compression performance curve for diameter 1.2m (6 layers) airbag
X= compress deformation (%) Y= bearing capacity per meter (KN/M)
1 = bearing capacity
Figure 3. – The compression performance curve for diameter 1.2m (6 layers) airbag
Pneumatic Rubber Fender’s Performance Curve:
Standard Performance Curve for Pneumatic rubber fender
