Vibration damping material, Vibration protection material, Sound absorber, Vibration damping rubber, Shock absorbing rubber, Low resilience rubber, Sound absorbing foam rubber.
Sound, vibration
and shock are transferred to heat energy and absorbed.
- Sound, vibration and shock are transferred to heat energy.
- Using Kureha’s know how we can supply with various kinds of material; rubber, foam rubber, etc.
- As we can supply extremely thin type and long size type, we can use for various purposes and contribute for cost reduction.
※VBRAN® stands for Vibration Blocking Rubber Anti Noisomeness.
Kureha will supply various vibration proof material by using various kinds of material.
■A list of articles and numbers
| Series name | Main Functions |
| G-series | vibration control, low-repulsive, high-repulsive, shock absorption |
| S-series | vibration suppression |
| F-series | sound absorption |
| L-series | complex(vibration suppression, sound absorption, sound insulation) |
Powerful against on both sides of sound source and sound propagation Applicable to vibration protection, vibration damping, sound absorption and sound sealing depending on material
■Sound protecting effect of product series
■Line up of sound protecting material
| Main functions | Product name |
| Shock absorption, vibration control, low-repulsive | G-series; G-N57, G-A30 |
| High shock absorption, high-repulsive | G-series; G-Q05G, G-Q10, G-Q20 |
| Vibration suppression | S-series; S-N89F |
| Sound absorption | F-series; F-E56, F-E56F2, F-P30, F-P30F |
| Vibration suppression, sound absorption, sound insulation | L-series; KE dumper |
| ●High shock absorption | Good shock absorption at normal temperature |
| ●Low resilience | Resilient elastic modulus 2.5% (energy absorption 97.5%) |
| ●High load resistance | Enduring at high weight which is hard for low hardness rubber |
| ●Other characteristic | ・As we can supply a long size type, we can contribute for cost reduction and large size production. |
| ・We can give low resilience to the rubber without damage. | |
| ・Good oil resistant and good light resistant. Easy processing. |
| Type | G-N57(High Load Type) | G-A30(Wide Temperature Type) |
| Material | NBR（Nitrile Rubber） | ACM（Acrylic Rubber） |
| Color | Black | Black |
| Thickness | 0.5〜10ｍｍ | 1〜6ｍｍ |
| Width | 1,000ｍｍ（１M） | 1,000ｍｍ（１M） |
| Length | ３M | ３M |
| ■Good shock absorbance at normal temperature. ■Resilient elastic modulus 2.5% (energy absorption 97.5%) ■Enduring at high weight which is hard for low hardness rubber and gel. |
■Good shock absorbance at wide range temperature. ■Resilient elastic modulus 2.5% (energy absorption 97.5%) ■Good heat-resistant. |
Please inquire us about other thickness.
| ●Office automation equipment | ：supporting rubber for printers |
| ●PC, Electric equipment | ：bottom of PC and HDD. LCD. |
| ●Transport machine | ：interior and exterior decoration of car, Machines for heavy industry, Vessel |
| ●Machine equipments | ：Compressor, Vending machine |
| ●Housing | ：Vibration control unit |
| ●Sports equipments | ：Grip, Protectors |
| Type | G-N57 | G-A30 | |
| Hardness | Point | 57 | 32 |
| Tensile strength | Mpa | 11.3 | 3.8 |
| Elongation at break | % | 520 | 380 |
| Change ratio after aging | % | 100℃×72hr | |
| ・Tensile strength | +33 | +13 | |
| ・Elongation | -21 | -13 | |
| ・hardness | +10 | +3 | |
| Compression set（70℃×24hr) | % | 59 | 19 |
| Compression set（125℃×72hr) | % | 89 | 42 |
| Liquid resistance test | % | 100℃×72hr | |
| ・IRM 903oil volume change ratio | -4 | +4 | |
| ・ASTM No1oil volume change ratio | -10 | +2 | |
The data is test values and not for guarantee
Under review (new formulation)
| ●Sound absorption | ：It shows 3 times more sound absorption efficiency than conventional material like urethane foam. Excellent sound absorption in audible sound frequency 1000 - 4000 Hz. |
| ●High function | ：EVA is good for weatherability and chemical resistance. |
| ●Low environmental load | ：Hydrogen cyanide gas generation is below 1/1000 comparing to polyurethane foam, so recycling is easier and the load to the environment is less. |
| ●Other characteristic | ：EVA is chemically stable in water and is not hydrolyzed. |
| Type | F-E56 (Standard Type) |
F-E56F2 (NoncombustibleType) |
F-P30 (Heat resistanceType) |
F-P30F (Heat resistanceType) |
| Material | EVA | EVA | EPDM | EPDM |
| Color | gray | ash brown | black | black |
| Thickness | 2〜90mm | 2〜90mm | 2〜70mm | 2〜70mm |
| Width | 1,000mm（1M） | 1,000mm（1M） | 1,000mm（1M） | 1,000mm（1M） |
| Length | 2M | 2M | 2M | 2M |
| Noncombustible | - | UL Standard：HF-1 | - | - |
| ●Communication Appliance | ：Portable audio equipment, case for PC |
| ●Others | ：Living equipment, interior and exterior decoration of car and Shinkansen, AV equipment |
Sound absorption ratio indicates how much of sound is absorbed in actual material.
Sound absorption is defined the incident that strikes a material that is not reflected back.
- KE damper is good for vibration damping material and soundproofing material, and can reduce the vibration and sound from vibrating body. KE damper is thin sheet for vibration blocking.
- When we attach KE damper directly to the vibrating metal plate, we can reduce the production of vibrating and noise.
- We can select from vibration damping sheet or complex of vibration blocking sheet and sound absorbing foam sheet.
- KE damper is very flexible and it is easy to bend.
uses; computer, office machine, sound equipment, air conditioner, construction machine, agricultural machine, transport machine, measuring equipment, medical machine, etc.
