Showa Denko KK (SDK) Develops New Carbon Nanofiber for Addition to Resins
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Showa Denko KK (SDK) Develops New Carbon Nanofiber for Addition to Resins - JCN Newswire
Showa Denko KK (SDK) Develops New Carbon Nanofiber for Addition to Resins

Tokyo, Sept 27, 2004 - (JCN Newswire) - Showa Denko K.K. (SDK)(TSE: 4004; US: SHWDF) has developed "VGCF-S," a new grade of carbon nanofiber suitable for addition to resins in which electrical conductivity is required. SDK has already commercialized vapor-grown carbon fiber (VGCF) with a diameter of 150 nm for use in lithium ion batteries. With the development of "VGCF-S," SDK will accelerate the development of new applications for multi-walled carbon nanofiber.

Carbon nanofiber tends to exhibit more useful characteristics as its diameter becomes smaller, but it also means that the handling - dispersion and blending - carbon nanofiber becomes more difficult. However, when added to resins, the newly developed "VGCF-S" provides electrical conductivity equal to that of carbon nanotube (CNT, having a diameter of approx. 20 nm) and, at the same time, enables high dispersion and blending into base material.

In the development of "VGCF-S," SDK utilized its VGCF technology developed jointly with Prof. Morinobu Endo of Shinshu University. SDK is the sole commercial producer in the world of VGCF, producing 40 tons a year. SDK has developed "VGCF-S" by optimizing the diameter and length of VGCF to achieve high electrical conductivity and good handling properties.

"VGCF-S" can be added to resins to produce highly antistatic trays and jigs for clean rooms. The resultant trays and jigs can protect fine circuits of electronic devices by preventing discharge of static electricity. Some customers have already started using "VGCF-S" for this application and expressed a great deal of satisfaction. Furthermore, "VGCF-S" can also impart to base material heat conductivity, electromagnetic shielding, and sliding properties. SDK will develop new applications for this material by fully utilizing the combination of these useful properties.
VGCF-S VGCF CNT Fiber diameter (nm) 100 150 20 Fiber length (mm) 10 9 -- Aspect ratio Fiber length/diameter) 100 60 -- Conductivity (powder resistivity: ocm) 0.010 0.013 0.010 Dispersion Good Good Not good SDK has established "VGCF-S" production technology and is planning to begin commercial production in 2005. SDK expects to start selling 30 tons per year of "VGCF-S" in 2008.

In October last year, SDK established MEFS Co., Ltd., a joint venture with Prof. Endo, to speedily develop new applications for advanced ceramic materials, including carbon nanofiber. SDK will continue to strengthen the foundation of its fine carbon business by commercializing the fruits of R&D by MEFS and its own laboratories.

About Showa Denko

Showa Denko K.K. ('SDK'; TSE: 4004, US: SHWDF) is a major manufacturer and marketer of chemical products serving a wide range of fields ranging from heavy industry to the electronic and computer industries. SDK makes petrochemicals (ethylene, propylene), aluminum products (ingots, rods), electronic equipment (hard disks for computers) and inorganic materials (ceramics, carbons). The company has overseas operations and a joint venture with Netherlands-based Montell and Nippon Petrochemicals to make and market polypropylenes. In March 2001, SDK merged with Showa Denko Aluminum Corporation to strengthen the high-value-added fabricated aluminum products operations, and is today developing next-generation optical communications-use wafers. For more information, please visit .


Showa Denko K.K.
IR & PR Group, 
Nobuhiro Kato


Sept 27, 2004
Source: Showa Denko

Showa Denko (TSE: 4004) (U.S: SHWDF)

From the Japan Corporate News Network
Topic: Research and development
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