Professional Lead Core Rubber Isolator to New Zealand

Contact information
Sales Manager:     Miss lurywen
Mobile Phone:      +86-13323183257
Tel:                        86-318-5106277
Fax:                       86-0318-5106277
Website:                *
Company:             Hengshui Jianfeng Engineering Rubber co., LTD. 



1. Description of lead rubber bearing (Seismic Isolator)
The Lead Rubber Bearing (LRB), Vulcanized rubber layers are laminated between steel plates to form a flexible structural support. It is installed as a Damping Equipment under building structures so as to control the tremor of structure against the loads of earthquake.

2. Application of lead rubber bearing
Base Isolation System, which is a branch of manual technique to reduce the tremor of structure, is widely applied to the large sized structures such as road bridges, rail bridges and nuclear power station to minimize damages from dynamic loads like earthquake.

3. Special Features of lead rubber bearing
(1) Strong Points
(2)Property of Lead as a Suitable Material for Earthquake Absorbing Work
(3)The Economic Design
(4)The More Excellent Safety
(5)Easy Installation

4. Function of lead rubber bearing
The rubber in the isolator acts as a spring. It is very soft laterally but very stiff vertically. The high vertical stiffness is achieved by having thin layers of rubber reinforced by steel shims. These two characteristics allow the isolator to move laterally with relatively low stiffness yet carry significant axial load due to their high vertical stiffness. The lead core provides damping by deforming plastically when the isolator moves laterally in an earthquake.


ITEMS Common Type Winter Hardness
CR NR EPDM
Tensile Strength (Mpa)≥ 19 19 16
Elongation At Break (%)≥ 450 500 350
Adhesive Seperating Strength with PTFE at 180®C kgf/2.5cm 5 5 4
Brittleness Temperature≤ -40 -55 -65
Compression Set (%) (70®Cx22H)≤ 30 30 30
Ozone Resistance 1PPm30®Cx100h No Cracking No Cracking No Cracking
Aging Factor%≥ 0.8 0.85 0.8
Hardness ( Shore A) 60¯5 60¯5 60¯5