Japan Tobacco Inc.

Fuji Manufacturing Co., Ltd.

Hirofumi Nakayama

Masato Takahashi

Keiji Mase

Shozo Ishibashi

Changming Zhao

Shinichi Iwata

Christian Ruslim

Tatsuya Nogami

A packaging container with an opening and closing lid, an opening is cut in an edge of the lid-raising member of a rear-side plate on a side of a lid-raising member of the inner case. A stopper is formed on part of the incision opening. An upper end edge of the stopper is an incision edge of the opening arranged at the lowest position of descent of an outer-case locking member and lower than a height position of inner-case locking member. The stopper approaches the outer-case locking member as the inner case moves upward. The outer-case locking member has at least a part of a stopper-corresponding portion in contact against the incision edge being the stopper, so that the outer-case locking member, which moves downward relative to the upward movement of the inner case, is in contact against the part that is the lowest position of descent thereof.

Packaging container with opening and closing lid

An abrasive that can impart a mirror finish, glossiness, or the like to a surface of a workpiece by blasting is provided. A crosslinked polyrotaxane compound having a network structure where crosslinking points are circular molecules of polyrotaxane and also having abrasive grains dispersedly mixed therein is obtained by causing chemical bonding between the circular molecules of the polyrotaxane in a state where the abrasive grains and the polyrotaxane are mixed. Then, the crosslinked polyrotaxane compound is granulated to a predetermined grain diameter to obtain a gel-like abrasive where a part of the dispersedly mixed abrasive grain is exposed at the surface. By using the thus-obtained gel-like abrasive in blasting by projecting the abrasive at an angle tilted with respect to a surface of a workpiece, mirror finishing or the like is possible without making the surface of the workpiece pearskin-like.

Process for producing gel-like abrasive material and gel-like abrasive material

Box for packaging

Growing community of inventors

Tokyo, Japan

Hirofumi Nakayama