Nippon Paper Papylia Company, Limited

Sumitomo Chemical Company, Limited

Nippon Paper Industries Co., Ltd.

Yoshiteru Kanomata

Yoshiaki Ishino

Makoto Sato

Akihito Ogino

Junpei Natsui

Hiroki Midorikawa

Yoshihide Mochizuki

Akihito c/o Product Devpt Research Ogino

Hiroki c/o Product Devpt Research Midorikawa

Junpei c/o Product Devpt Research Natsui

A coating paper which can be removed by water comprising a substrate paper of single layer or lamellar structure having two or more layers which has at least one water decaying layer containing 5-100 wt % of water insoluble fibrous carboxy alkyl cellulose and a water base color is coated on said substrate paper, wherein a coating layer and at least a part of substrate paper which is a supporter of said coating layer has a characteristic of easily removing, dispersion and dissolving by contact with water, and can provide a water decaying coating paper used preferably for an use of label for a returnable container which may easily remove by contact with water and excellent in printing aptitude and a method for preparation thereof can be provided.

Coating paper which can be removed by water and a method for preparation thereof

A period indicator including a liquid-permeable substrate and an indicative section which is overlaid on a portion of the substrate and which is formed from a liquid-permeable material having a low light refractive index, the indicator containing a volatile liquid, wherein the indicative section is formed by coating a surface of the substrate with an indicative-section-forming material prepared by mixing a binder and finely divided particulate matter having a low light refractive index, the indicative section is composed of two or more regions, and the regions differ in height from one another as measured from the surface of the substrate, as the coating amounts per unit area of the indicative section forming material in respective regions differ from one another. Since the period indicator can indicate the chemical-containing state stepwise, it is useful for indicating the available period of use of a chemical such as a mothproofing agent, an insecticide, a deodorant, or a fragrance.

Period indicator

Growing community of inventors

Shizuoka, Japan

Yoshiteru Kanomata