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Heat-sensitive recording material

A heat-sensitive recorder, heat-sensitive recording technology, applied in the temperature recording method, etc., can solve problems such as adhesion, failure to achieve water resistance, and insufficient

Inactive Publication Date: 2006-07-05
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Regarding the improvement of water resistance, for example, Patent Document 1 describes the method of adding an isocyanate compound to a binder such as polyvinyl alcohol, but it is still insufficient.
On the other hand, although it is known that water resistance can be improved by using hydrophobic resin emulsions such as vinyl acetate emulsions, acrylic emulsions, or SBR emulsions as binders for thermosensitive recording layers, edge deposits (ヘツドカス) sometimes occur during recording. Adhesion or sticking, problematic in use
In addition, Patent Document 2 proposes using a composite of colloidal silica and an acrylic polymer as an adhesive, and Patent Document 3 proposes a method using a self-crosslinkable acrylic emulsion and colloidal silica, but Water resistance is far from being sufficient for outdoor use, and it cannot be said that end deposit adhesion can be sufficiently suppressed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0153] Hereinafter, the thermosensitive recording material of the present invention will be described by way of examples. In addition, in the description, parts and % represent parts by weight and % by weight, respectively, unless otherwise specified.

[0154] The following evaluations were performed on the thermosensitive recording media obtained in Examples and Comparative Examples.

[0155] [Color Sensitivity]

[0156] Using TH-PMD manufactured by Okura Electric Co., Ltd., printing was performed on the produced thermosensitive recording material with an applied energy of 0.25 mJ / dot and 0.34 mJ / dot. The image density after printing and after the quality test was measured with a Macbeth densitometer (using an amber filter).

[0157] [water resistance]

[0158] One drop of water was dropped on the surface of the thermosensitive recording material, and after 10 seconds, it was wiped once with facial tissue, and the peeling degree of the recording surface was judged visually, ...

Synthetic example 1

[0174] Pure water was added to commercially available JIS No. 3 water glass (SiO 2 / Na 2 O molar ratio is 3.22, SiO 2 Concentration is 28.5% by weight), obtains SiO 2 An aqueous solution of sodium silicate with a concentration of 3.6% by weight. The above-mentioned sodium silicate aqueous solution was passed through a cation exchange resin packed column with the trade name Amba-Light 120B prepared separately, thereby obtaining SiO 2 A colloidal aqueous solution of active silicic acid with a concentration of 3.60% by weight, a pH of 2.90, and a conductivity of 580 μS / cm.

[0175] The colloidal aqueous solution 888g (SiO 2 content 32.0g) into a glass container, add 600g of pure water under stirring to make SiO 2 A colloidal aqueous solution of active silicic acid at a concentration of 2.15% by weight and a pH of 3.07. Next, 59 g (CaO content 2.02 g) of 10 weight% calcium nitrate aqueous solution (pH 4.32) was added thereto at room temperature with stirring, and stirring wa...

Synthetic example 2

[0183] 1,800 g of the alkaline mixed liquid (c) obtained in Example 1 was put into a stainless steel autoclave, stirred and heated at 135° C. for 3 hours, cooled, and 1,800 g of the contents were taken out. The obtained liquid is transparent colloidal silica sol [chain silica sol B], SiO 2 The content concentration is 21.5% by weight, the pH is 9.56, the specific gravity is 1.141, the viscosity is 4.5 mPa·s, the electrical conductivity is 3285 μS / cm, and the particle diameter (D1) measured by the dynamic light scattering method is 116 nm. Therefore, the D1 / D2 ratio is 5.66.

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PUM

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Abstract

The present invention provides a heat-sensitive recording material, which is a heat-sensitive recording material in which a heat-sensitive recording layer containing a colorless or light-colored basic leuco dye and a color developer as main components is provided on a support, and is characterized in that In that, the thermosensitive recording layer contains an acrylic polymer obtained by copolymerizing alkyl acrylate, alkyl methacrylate, and vinyl silane as monomer components, and colloidal silica, and the colloidal silica Silicon has a chain structure.

Description

technical field [0001] The present invention relates to a heat-sensitive recording medium utilizing a color reaction of a colorless or light-colored basic leuco dye and a developer, and in particular, to a paper suitable for portable terminals or distribution receipts, etc. Water-resistant thermosensitive recording media for outdoor use. Background technique [0002] Generally, a thermosensitive recording material in which a recorded image is obtained by a colorless or light-colored basic leuco dye (ロイコ dye) and a developer through a thermal chromogenic reaction has a very vivid color and there is no Noise, relatively cheap equipment, miniaturization, and easy maintenance are widely used in facsimile machines, computers, and various measuring instruments. In addition to labels and tickets, applications as output media for various printers and plotters for outdoor measurement, portable terminals for outdoor measurement, and various printers and plotters for distributing rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/28B41M5/30B41M5/34
Inventor 伊达隆夏井纯平绿川佳美永井龙夫木村义英
Owner NIPPON PAPER IND CO LTD
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