Matsushita Electric Industrial Co., Ltd.

Eizo Asakura

Minoru Yoshinaka

Motoi Kitano

Mitsumasa Oku

Hideyuki Yoshida

Takeshi Hamabe

Seiichi Nakatani

Yoshio Nakatani

Toshiya Hatta

Jun Yagi

Kouziro Matsuo

Takashige Sato

Hidenosuke Nakamura

Toshihiro Misaki

Soundproofing materials consisting essentially of zinc oxide whisker particles having a nucleus body and needle crystal portions extending radially from the central body in different plural directions. The materials may comprise a support material for supporting the zinc oxide whisker particles. Such support materials include inorganic materials such as metals, ceramics, glasses, cements, mortars and various fillers in the form of powder, flakes, fibers and the like, and organic materials such as resins, rubbers, waxes and the like. These materials are particularly suitable for sound insulation, sound proofing, vibration damping and vibration insulation.

Soundproofing materials

A radio wave absorbing material comprising zinc oxide whiskers. In a preferred embodiment, the zinc oxide whiskers are comprised of a central part and needle crystal projections extending from said central part in plural different axial directions.

Radio wave absorbing material

A conductive composition containing at least zinc oxide whiskers. The conductive composition can be used to provide a conductive resing composition and a conductive coating composition, which have various uses, particularly in conductive layers, conductive supports or protective layers of electrophotographic photosensitive members.

Conductive resin composition containing zinc oxide whiskers having a

A conductive composition containing at least zinc oxide whiskers having a tetrapod structure. The conductive composition can be used to provide a conductive resin composition and a conductive coating composition, which have various uses, particularly in conductive layers, conductive supports or protective layers of electrophotographic photosensitive members.

Electrophotographic photosensitive member containing a conductive layer

Method for manufacturing zinc oxide whiskers

Whiskers of zinc oxide whose crystal structure includes a central body and four needle crystal projections radially extending from said central body are described. The whiskers are so unique a structure that they are applicable to various materials such as metals, resins, ceramics and the like as a reinforcing material. The whiskers may be in the form of a mixture of whiskers of zinc oxide having crystal structures including two, three, four and/or five needle crystal projections. A method for preparing such whiskers is also described.

Zinc oxide whiskers having a novel crystalline form and method for

A metal composition comprising zinc oxide whiskers dispersed in a metal matrix. The whiskers comprise at least one needle crystal having a basal part whose diameter is from 0.7 to 14 micrometers and a length from the basal part to its tip of from 3 to 200 micrometers. The metal composition is isotropically reinforced with respect to mechanical strength and is significantly improved in free cuttability.

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Osaka, Japan

Eizo Asakura