Kao Corporation

Fuji Photo Film Company, Limited

Yoshiyuki Nabata

Harumasa Yamasaki

Yuzo Yamamoto

Yukinaga Yokota

Hidehiko Nakayama

Masayasu Sato

Masayoshi Morii

Takashi Kawai

Akira Mamada

Shinji Yamada

Takeshi Nakajima

Mitsuo Shimizu

A process for producing a cosmetic-impregnated sheet which comprises applying and infiltrating a cosmetic base to and into a base sheet having on the surface thereof a retentive sheet capable of absorbing and retaining the cosmetic base at a shear rate of 10to 10s, the cosmetic base being applied to and infiltrated into the retentive sheet of the base sheet, and the cosmetic base, when subjected to a steady shear deformation at a shear rate of 2 sfor 100 seconds followed by a steady shear deformation at a stepwise increased shear rate of 20 s, showing no shear stress growth or showing such a shear stress growth that the difference between the peak shear stress B at a shear rate of 20 sand the equilibrium shear stress A at the same shear rate, B&#x2212;A, is 20% or smaller of the equilibrium shear stress A in the transition between the two shear rates.

Method of producing cosmetics-impregnated sheet

A magnetic recording tape having improved durability and capable of conducting recording and reproduction of data with high reliability, and a method for manufacturing the same are provided. The magnetic recording tape comprises a substrate having a thickness equal to or less than 7 &mgr;m and at least one magnetic layer provided on one surface of the substrate, and the magnetic recording tape has a longitudinal creep deformation ratio in a range of less than 0.04% when the magnetic recording tape is subjected to a longitudinal tensile stress of 19.1 MPa for 25 minutes at 50&deg; C.

Magnetic recording tape and method for manufacturing the same

A magnetic recording medium comprising a substrate having thereon at least a magnetic layer and a lubricant layer and a process for producing the same are disclosed, in which the lubricant layer is an uppermost layer and comprises a perfluoropolyether lubricant having a number average molecular weight of 800 to 30,000 and represented by formula (I):

Magnetic recording medium having a lubricant layer with a specified

A fluorine-containing lubricant having a linear structure devoid of polar groups at the terminals of its molecule, and has at least two polar groups on the intermediate carbon chain of the molecule is disclosed. A magnetic recording medium employing the lubricant is also disclosed.

Lubricant and magnetic recording medium using the same

A polyurethane is prepared with use of a catalyst comprising a compound having the formula: ##STR1## in which n is an integer of 2 to 12, A is a hydrogen or a group of --CH.sub.2 CHRCH.sub.2 NH.sub.2 and R is hdyrogen or methyl, provided that n is 6 when A is hydrogen. The compound scarcely smells and does not elute out of the polyurethane article. The process is easy to control.

Growing community of inventors

Tochigi, Japan

Yoshiyuki Nabata