Ricoh Company, Ltd.

Other

Norihiko Inaba

Kiyotaka Iiyama

Hiroshi Goto

Mitsunobu Morita

Hiroshi Sakamoto

Tomoyuki Kugo

Takanori Motosugi

Motoi Orihara

Akira Suzuki

Kazuo Kobayashi

Koji Yamamoto

Mitsuru Naruse

Keishi Taniguchi

Motoharu Tanaka

Takehito Yamaguchi

Toshiaki Ikeda

Tomohisa Kakuda

Tohru Kitano

Hiroaki Inoue

Shinobu Miyauchi

Hiroaki Okuda

Yoshihiro Koseki

Hisao Yuyama

Shinichi Asami

A heat-sensitive adhesive material contains a substrate and a heat-sensitive adhesive layer that contains a thermoplastic resin and a solid plasticizer, and the heat-sensitive adhesive material is so configured as to be heated and applied to an adherend, wherein the heat-sensitive adhesive material exhibits such an adhesive strength to the adherend as to increase with time from immediately after applying the heat-sensitive adhesive material to the adherend.

Heat-sensitive adhesive material, adhered article, process and apparatus for thermally activating the heat-sensitive adhesive material

To provide a heat-sensitive recording material including a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developing layer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and acrylic resin or maleic acid copolymer resin.

Heat-sensitive recording material

In order to provide heat-sensitive adhesive materials that represent high pressure-sensitive adhesive strength with respect to rough adherends such as cardboards or polyolefin wraps and lower decrease of adhesive strength with time, are thermally activated with lower energy and exhibit excellent blocking resistance, heat-sensitive adhesive materials are disclosed that contain a support, an underlayer, and a heat-sensitive adhesive layer, in this order, wherein the underlayer comprises a thermoplastic resin and a hollow filler, and the glass transition temperature of the thermoplastic resin is &#x2212;70&#xb0; C. or higher and below 0&#xb0; C.

Heat-sensitive adhesive material

A method for issuing a label, including feeding a first label sheet including a support and a thermosensitive adhesive layer located overlying one side of the support, wherein the first label sheet has a timing mark on the thermosensitive adhesive layer; detecting the timing mark; and cutting or semi-cutting the first label sheet to produce a second label sheet, wherein the timing mark is present at a position other than corners of the second label sheet, and wherein a ratio of an area of the timing mark to an area of the second label sheet is from 0.5 to 35%.

Method for issuing label with thermosensitive adhesive

A thermosensitive recording adhesive label sheet has a support, a thermosensitive recording layer provided on the front side of the support, containing a leuco dye serving as a coloring agent and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, a protective layer provided on the thermosensitive recording layer, containing a binder agent, a pigment and a lubricant, an adhesive layer provided on the back side of the support, opposite to the side of the thermosensitive recording layer with respect to the support, and a disposable backing sheet which is made from a neutral paper and attached to the adhesive layer; with the lubricant for use in the protective layer including an aliphatic acid metallic salt in an amount of 2 wt. % or less of the total solid content of the protective layer.

Thermosensitive recording adhesive label sheet

A thermosensitive recording material comprising a leuco dye, a color developer and a water-soluble lubricant such as an alkylphosphate compound having formula (I) or (II): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each independently are an alkyl group, an alkynyl group or a monovalent metallic element, but they cannot be the metallic element at the same time; or ##STR2## wherein R.sub.4 is an alkyl group or an alkynyl group, and R.sub.5 is a monovalent metallic element.

Thermosensitive recording material

A multi-color thermosensitive recording material comprising a support material, three or more thermosensitive coloring layer successively overlaid thereon and decolorizing intermediate layers interposed between the thermosensitive coloring layers, with at least the thermosensitive coloring layers except the thermosensitive coloring layer adjacent to the support material each comprising a basic leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of thermal energy at a predetermined temperature, and each decolorizing intermediate layer containing a decolorizing agent which is capable of decolorizing the color developed in the thermosensitive coloring layer adjacent to the decolorizing intermediate layer when heated to a higher temperature than the predetermined coloring temperature for the thermosensitive coloring layer, which decolorizing agent for use in at least one of the decolorizing layers is (i) a N,N'-disubstituted aromatic diamide compound, (ii) a piperazine compound having at least two amido groups or (iii) a combination of the two compounds.

Multi-color thermosensitive recording material

A two-color thermosensitive recording adhesive label comprising a support material, a first lower thermosensitive coloring layer and a second upper thermosensitive coloring layer supported on the support material, capable of yielding two different colors, with the coloring temperature for the second thermosensitive coloring layer being lower than that for the first thermosensitive coloring layer, in which at least the second thermosensitive coloring layer contains a basic leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of thermal energy, and a decolorizing agent for decoloring the color developed in the second thermosensitive coloring layer at the time of color development of the first thermosensitive coloring layer is contained in the first thermosensitive coloring layer or in a decolorizing intermediate layer interposed between the first thermosensitive coloring layer and the second thermosensitive layers, which decolorizing agent is selected from particular piperazine derivatives and a compound having three or more amide groups and a compound having two or more amide groups and one or more tertiary amine groups as defined in the claims.

Two-color thermosensitive recording adhesive label

A two-color thermosensitive recording label capable of forming two different colors when heated at different temperatures is disclosed, which comprises: (a) a support material and the following layers successively formed thereon, (b) a first thermosensitive coloring layer which is colored in a first color at a predetermined high temperature T, formed on one side of the support material, (c) a decolorizing layer containing a decolorizing agent, (d) an intermediate layer, (e) a second thermosensitive coloring layer, which is colored in a second color at a predetermined low temperature, the second color being decolorized by the decolorizing agent when heated to a predetermined temperature, so that the color developed in the second thermosensitive coloring layer is prevented from being mixed with the color developed in the first thermosensitive coloring layer, and the second thermosensitive coloring layer and the second color are protected from the decolorizing layer by the intermediate layer so long as the second thermosensitive coloring layer is not heated up to the predetermined temperature, (f) a protective layer for protecting the second thermosensitive coloring layer, (g) an adhesive layer formed on the other side of the support, and (h) a disposable backing sheet which is attached to the adhesive layer.

Two-color thermosensitive recording label

A two-color thermosensitive recording material comprising (a) a support material, (b) a high temperature thermosensitive color-forming layer formed on the support material, (c) an intermediate layer formed on the high temperature color-forming layer and (d) a low temperature color-forming layer formed on the intermediate layer; a two-color thermosensitive recording material comprising (a) a support material, (b) a high temperature thermosensitive color-forming layer formed on the support material, (c) a decolorizing layer, (d) an intermediate layer formed on the decolorizing layer and (e) a low temperature color-forming layer formed on the intermediate layer; and a two-color thermosensitive recording material comprising (a) a support material, (b) a decolorizing and color developing layer formed on the support material, (c) an intermediate layer formed on the decolorizing and color developing layer and (d) a two-color thermosensitive coloring layer capable of yielding two different colors when heated at different temperatures, with all the above intermediate layers comprising as the main component a vinylidene chloride resin.

Two-color thermosensitive recording material

A thermosensitive recording sheet comprises a support material; a thermosensitive coloring layer formed on the support material, comprising a colorless or light-colored leuco dye, and an acidic material which colors the leuco dye upon application of heat thereto; and a protective layer formed on the thermosensitive coloring layer, comprising a water-soluble polymeric binder and silica powder with an oil absorption of 150% or more and with a bulk density of 5 ml/g or more, which are measured in accordance with Japanese Industrial Standard K 5101. This thermosensitive recording sheet has high dynamic thermal coloring sensitivity, is capable of yielding sharp images with high image density at low energy consumption with good thermal head-matching properties, and is resistant to chemicals.

Thermosensitive recording sheet

A two-color thermosensitive recording material comprising a support material, a first lower thermosensitive coloring layer and a second upper thermosensitive coloring layer supported on the support material, capable of yielding two different colors, with the coloring temperature for the second thermosensitive coloring layer being lower than that for the first thermosensitive coloring layer, in which at least the second thermosensitive coloring layer contains a basic leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of thermal energy, and a decolorizing agent for decoloring the color developed in the second thermosensitive coloring layer at the time of color development of the first thermosensitive coloring layer is contained in the first thermosensitive coloring layer or in a decolorizing intermediate layer interposed between the first thermosensitive coloring layer and the second thermosensitive layers, which decolorizing agent is a di-substituted aromatic diamide derivative or a piperazine derivative including two acylamino groups.

A thermosensitive recording sheet comprising a support material; a primer layer formed on support material, comprising a filler and a binder agent; a thermosensitive coloring layer formed on the primer layer, comprising a colorless or light-colored leuco dye, and an acidic material which colors the leuco dye upon application of heat thereto; and a protective layer formed on the thermosensitive coloring layer, comprising a water-soluble polymeric binder agent and a filler. This thermosensitive recording sheet has high dynamic thermal coloring sensitivity and is capable of yielding sharp images with high image density at low energy consumption with good thermal-head-matching properties such that materials are not generated which come out of the thermosensitive recording layer and adhere to the thermal pen or head during the recording process, thereby causing the thermal pen or head to stick to the thermosensitive recording sheet.

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Numazu, Japan

Norihiko Inaba