China's first instrument to study the internal fine structure of materials

According to "Guangming Daily" reported on January 4, 2007: What is the electronic structure inside the material? Today, this puzzle that plagues scientists is expected to be solved. The "Ultra High Energy Resolution Vacuum Ultraviolet Laser Angle-Resolved Photoelectron Spectrometer" jointly developed by the Institute of Physics of the Chinese Academy of Sciences and the Institute of Physics and Chemistry has recently passed the expert appraisal by the Academician Gong Changde. Experts believe that the instrument is suitable for the study of the fine electronic structure of complex systems, and provides a key experimental means for explaining the causes of the singular physical properties of advanced materials, such as the mechanism of high-temperature superconductivity.

Researcher Zhou Xingjiang, the project leader, said that the material is metal, insulator, semiconductor or superconductor. These macroscopic physical properties are determined by the microscopic electronic structure of the material, and photoelectron spectrometer is an important tool for analyzing the electronic structure of materials. In the past, photoelectron spectrometers mainly adopted two methods: synchronous radiation source or gas discharge source. Vacuum ultraviolet lasers are a new source of light other than these two sources, and have made breakthroughs in solving energy resolution and surface sensitivity.

Experts such as Gan Zikai and other experts have consistently believed that this is the first time in the world to apply vacuum ultraviolet laser to high resolution angular resolution photoelectron spectroscopy. The main technical indicators are in the international leading position.

Flexible EVA Round Hollow Silicone Foam Tube , Hollow Silicone Tube ID40mm



Product Description


texture EVA Foam Tube/eva foam grip/EVA Foam Handle

When PVC and Nitrile are combined by polymerisation, they product is a soft, closed cell sponge rubber which needs a low deflection force to create a seal.



  • Excellent resistance to acid, fuel & oil,
  • Density: 60 – 130 Kg/m³
  • Soft
  • Poor compression set
  • Ozone resistant
  • Temperature range from +85°C  to - 50°C.
  • Fire Retardant to BS476 pt. 6 & 7 Class O.

Typical Uses:

  • Oil Seals,
  • Cushioning,
  • Vibration Dampening
  • Shock Absorption
  • Pipe Lagging
  • Thermal Insulation
  • Construction Applications
  • Medical Applications


The foams can be supplied with or without a self adhesive backing and can be cut into coils for sealing tapes.

Super-Soft PVC/Nitrile Sponge Rubber

A new semi-closed cell version has been developed as an alternative to Nitto and Armacell grades. The product is a standard PVC/Nitrile sponge rubber and the cells have been crushed to open some of them up to create a soft low compression seal product.



  • Density is approx. 90 Kg/m³
  • Excellent Air & UV resistance
  • Poor oil resistance
  • Good Acid resistance
  • Ultra soft with little compression required to deform it.

Typical Uses:

  • Sealing of Air Conditioning Ducts
  • Areas for superior water tightness
  • Instrument panel mounting
  • Windscreen mounting
  • Mirror mounting
  • Centre Pillar Mounts
  • Seals where uneven surfaces are present


Closed cell NBR Sponge tube


Closed cell NBR Sponge is a Neoprene/EPDM/NBR blend. Applications for this material include Gaskets, Weatherstripping, and Cushioning. 

Excellent Resistance to: Acid, Alkaki, Ozone, and Oxidation.

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EVA Foam Tube

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KEYUACE Materials Co., Ltd. ,