Bridgestone Corporation

Munenori Iizuka

Kunio Machida

Takahiro Suzuki

Takashi Harada

Keiichi Hasegawa

Yoshihide Kouno

Hiroyuki Fudemoto

Seiji Kon

Takayuki Yako

Masashi Otsuki

Youichi Nishimuro

Hideharu Daifuku

Hajime Tamura

Yasuro Shiomura

Yoichi Nishimuro

Provided is a tire having at least a circular tire frame formed of a thermoplastic resin material, the tire including a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material including at least a polyamide-based thermoplastic elastomer.

Tire, and tire manufacturing method

Provided is a tire having a circular tire frame formed of at least a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on an outer circumference of the tire frame, and the thermoplastic resin material contains at least a polyester-based thermoplastic elastomer.

Tire, and manufacturing method for same

The present invention relates to a pneumonic tire and a rubber composition used in the same, both of which are capable of preventing static charge build-up on a tire surface without degrading various tire performances such as rolling resistance and so on, and particularly to a rubber composition comprising 10 to 30 parts by mass of an ionic liquid and 5 to 95 parts by mass of silica per 100 parts by mass of a rubber component containing at least 50% by mass of styrene-butadiene rubber, as well as a pneumatic tire using such a rubber composition in a tread portion.

Rubber composition for tire tread and pneumatic tire

A resin made base body in the form of a pipe has (1) a plurality of alternating projections and depressions which are provided on an outer peripheral surface of the pipe and aligned in substantially parallel rows in one of an axial direction and a circumferential direction of the pipe; (2) a specular gloss at 60&#xb0; of a surface of the pipe in a range of 15 to 25; or (3) a skin layer formed in an outer peripheral portion in the thickness direction of a peripheral wall of the pipe, wherein an amount of the conductive agent present in the skin layer is equal to, or less than, one-tenth an amount of the conductive agent present in a central portion in the thickness direction of the peripheral wall of the pipe.

Base body for photosensitive drum and photosensitive drum

The invention relates to a cylindrical resinous base-body for a photosensitive drum, and a photosensitive drum that includes the resinous base-body.

Base-body for photosensitive drum and photosensitive drum with the use of the same

There are disclosed a composition for resin magnets which comprises a thermoplastic resin and magnetic powders and which, when determined in a heated molten state, has specific viscosity characteristics characterized in that the almost linear line which is obtained by taking &eegr; /&eegr; as ordinate and &ggr; as abscissa has a slope of at most 0.02, preferably at most 0.01 within a specific temperature range in which &eegr; falls within the range of from 2.0&times;10 to 1.0&times;10 dyne/cm , wherein &eegr; denotes shear stress (dyne/cm ), &eegr; denotes yield stress (dyne/cm ) and &ggr; denotes shear rate (S ); a magnetic member which is produced by the use of the above composition for resin magnets; and a process for efficiently producing the magnetic member from the composition by an extrusion molding in a magnetic field under specific temperature and pressure conditions. The above composition for resin magnets has specific viscosity characteristics, and thereby enables to readily afford a magnetic member having a strong magnetic force such as magnet rollers and magnet pieces. Accordingly, the magnetic member is well suited for use in the field of electrophographic equipment and electrostatic recording equipment such as copying machinery, facsimile machinery and printers.

Composition for resin magnet, magnetic member using same and process for producing said magnetic members

The invention relates to a photosensitive drum based on a cylindrical base which is made with an electrically conductive resin composition which comprises a polyamide resin as the resin component and an electrically conductive material, said polyamide resin being one selected from the group consisting of polyamide resins obtained from m-xylylenediamine and adipic acid, polyamide resins obtained from &egr;-caprolactam, and mixtures thereof. The cylindrical base for the photosensitive drum has good surface smoothness as well as good mechanical strength, and it can be obtained easily by injection molding or the like from said resin composition.

Electrically conductive resin composition and photosensitive drum made therewith

A bonded magnet featuring mechanical strength is obtained from a bonded magnet-forming composition comprising magnetic powder and a binder wherein the binder is based on highly crystalline polypropylene in one form or contains a modified polyolefin in another form. Also provided is a magnet roller comprising a magnet body (1) of bonded magnet configured into a roller shape and a shaft (2) associated therewith wherein at least the magnet body (1) is formed from the bonded magnet-forming composition.

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Kodaira, Japan

Munenori Iizuka