Kao Corporation

Takahisa Yamashiro

Noriyuki Kitaori

Shigeto Kayane

Masayasu Sato

Kiyoteru Osawa

Kazuhiko Kato

Takeshi Miyamura

Junji Nakamura

Yoshitaka Yano

Provided is a solid preparation for oral application containing (a) gum tragacanth and (b) a polyphosphoric acid or salt thereof and constituted so that the polyphosphoric acid or salt thereof starts to dissolve firstly and the gum tragacanth starts to dissolve subsequently. The solid preparation for oral application according to the present invention has a high plaque formation inhibiting effect.

Solid preparation for oral application

The present invention relates to a liquid composition for the oral cavity, which contains the following components (A), (B), (C) and (D): The present invention also pertains to a liquid composition for the oral cavity, which contains the following components (A), (B), (E) and (F): The liquid composition for the oral cavity according to the present invention is excellent in the adsorption of the bactericide to teeth and the like, barely causes unpleasant odor, and is excellent in stability.

Liquid compositions for the oral cavity

An ultrasonic cleaning apparatus comprises: a power amplifier for amplifying an amplitude of a signal to supply the signal as power to the ultrasonic oscillator; a phase comparator for obtaining a difference between a phase of a current flowing through the ultrasonic oscillator and a phase of a voltage applied to the ultrasonic oscillator and for generating a voltage in accordance with the phase difference; and a voltage control oscillation device for generating a frequency of the signal in accordance with the voltage generated by the phase comparator and for controlling the frequency so that the phase difference is kept within &plusmn;30&deg;, wherein the power supplied to the ultrasonic oscillator is regulated to a range from 1W to 10W, and a difference between a resonance frequency of the ultrasonic oscillator and an anti-resonance frequency thereof is regulated to 1 kHz or more.

Ultrasonic cleaning apparatus and ultrasonic cleaning method

Provided is a vibrating section having an ultrasonic transducer of piezoelectric elements and a rear ultrasonic horn and a front ultrasonic horn, the horns being joined to the transducer. The ultrasonic transducer has a consumption power set at 8W or less. The ultrasonic horn has a flat front end surface, the area of the front end surface being set at 0.07 to 1 cm .

Growing community of inventors

Utsunomiya, Japan

Takahisa Yamashiro