| Customization: | Available |
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| After-sales Service: | 5years |
| Warranty: | 5years |
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Lead rubber bearing, also called lead core rubber bearing, LNR rubber bearing, has similar structure with high damping rubber bearing. It is an important component of seismic isolation bearing. It is composed of laminated rubber bearing and lead core. The lead core can not only bear the heavy load and horizontal force, but also absorb energy through plastic deformation of hysteresis damping.
Lead rubber bearing can be divided into round and rectangular shapes for different application. Additional, the lead core quantity can be single or multiple to supply maximum flexibility in the bridges or building.
The lead rubber bearing has same mechanical properties with laminated rubber bearing. Besides, it has high damping property.
As we all know, the laminated rubber bearing has large displacement deformation in horizontal direction.
In the earthquake, this structure can separate top and bottom structure vibration, enlarge self vibration cycle and reduce seismic force. Besides, the lead core will be squeezed and yielded during the shear process to dissipate Seismic force.
After the earthquake, the lead rubber bearing can help building restore the normal position through dynamic recovery and recrystallization of lead core and shear strain of laminated rubber bearing.
Function of lead core bearing pad
Specification
Technical parameter
| Technical index | Neoprene Rubber | Natural Rubber | |
| Hardness (IRHD) | 60±5 | 60±5 | |
| Strength Tensile (Mpa) | ≥17 | ≥18 | |
| Elongation at break (%) | ≥400 | ≥450 | |
| Brittleness temperature (ºC) | ≤40 | ≤-50 | |
| Constant compression permanent deformation | ≤15 | ≤30 | |
| Resistance to ozone aging test (test conditions,20% elongation,40ºC×96h) |
100ppmm | 25ppmm | |
| No cracking | No cracking | ||
| Hot air aging test (The biggest change comparing with before aging numerical) |
Test conditions (ºC×h) | 100×70 | 70×168 |
| Strength Tensile (%) | -15 | -15 | |
| Elongation at break(%) | -40 | -20 | |
| Variation in hardness (IRHD) | 0,+10 | -5,+10 | |
| Strength of rubber and steel Peel adhesive (KN/m) | >10 | >10 | |
| Strength of four fluorine plate and rubber (KN/m) | >7 | >7 | |
Hengshui Jingtong Rubber Co., Ltd., located in Hebei Province's Hengshui City, is a professional manufacturer of engineering rubber products. Our product range includes bridge bearings, expansion joints, water stop strips, water stop belts, inflatable cores, building deformation joint device and water plugs, which are widely used in bridge, tunnel, water conservancy, and power engineering projects. The company boasts advanced technology and mature processes to ensure reliable product quality.
We have a professional technical team and a comprehensive after-sales service system to ensure customers receive high-cost-performance products and attentive service. Hengshui Jingtong Rubber Co., Ltd. is committed to continuous innovation to meet market demands and looks forward to establishing long-term cooperative relationships with customers from both domestic and international markets.
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