A thermal recording material comprising a support and, sequentially superimposed thereon, an undercoating layer, which contains a pigment and a binder as main components, and a thermal recording layer, which contains an achromatic or hypochromic basic colorless dye and a developer capable of reacting with the basic colorless dye to thereby realize color formation as main components, wherein the undercoating layer comprises a carboxymethylcellulose exhibiting an etherification degree of 0.55 to 0.75. Causing the undercoating layer to further contain hydroxymethylcellulose is preferred from the viewpoint of high effectiveness.

Thermal recording material

Provided are methods of inhibiting bile acid uptake from the gastrointestinal system and reducing blood serum cholesterol by administering to a mammal, such as a human, an effective amount of particles comprising amphiphilic copolymers, having a cross-linked shell domain and an interior core domain.

Particles comprising amphiphilic copolymers, having a cross-linked shell domain and an interior core domain, useful for pharmaceutical and other applications

Bisphenol A (BPA) is widely used as a color developer in thermal paper. Thermal paper is ubiquitous in daily life due to its use in cash register receipts, so opportunities for human contact abound. For this study, 10 blank cash register receipts were obtained from businesses in suburban Boston. BPA was extracted and analysis of concentration was performed using gas chromatograph/flame ionization detector. In some receipts, BPA was not detected but in others it was as high as 19 mg for a 12-inch long receipt, which is in line with concentrations indicated in patents. This study is intended to highlight the potential for human exposure to BPA as well as the ease with which exposure may be reduced through the use of BPA-free thermal paper.

https://www.tandfonline.com/doi/pdf/10.1080/17518253.2010.502908

Concentration of bisphenol A in thermal paper

An improved heat-sensitive recording material is disclosed comprising a substrate, a binder, a chromogenic material, an electron-accepting color developer which reacts with said chromogenic material to form a color, and a color-stabilizing resin. The color stabilizing resin comprises an addition product of a diolefinic alkylated or alkenylated cyclic hydrocarbon or, an addition product of a phenol and a diolefinic alkylated or alkenylated cyclic hydrocarbon. The color-stabilizing resin, dye, and developer, have a weight percent resin phenolic group of about 5 or less. The heat-sensitive recording material has a fade index greater than 45. Imaged recording materials according to the invention resist fading when exposed to temperatures of 60°C for prolonged periods such as twenty-four hour oven tests.

Thermally-Responsive Record Material

A dye fixing element comprising a polymer mordant, said polymer mordant containing at least one monomeric unit including at least one group derived from the class of tertiary amines, thioethers, aromatic 5-membered heterocyclic rings, hydrazides, hydrazones and polyarylphenols, and at least one quaternary ammonium group.

Dye fixing element

A thermal recording medium produced by forming on a substrate an undercoat containing a pigment and a binder as the main components and a thermal recording layer containing as the main components a colorless or pale-colored basic dye and a developer capable of reacting with the dye to form a color, which is improved in image quality by incorporating a water-retaining agent into the undercoat and using as the pigment one exhibiting an oil absorption of 80 to 120 cc/100g (as determined by the method according to JIS K 5101) and by adjusting the coating fluid for the undercoat to a solid concentration of 25 to 45 % and a dynamic water retention (the amount of AA dewatering) of 350 g/m2 or below.

Thermal recording medium

A heat sensitive recording element comprising, provided on a support, a heat sensitive recording layer containing at least a light absorbing material for absorbing a laser beam for conversion into heat, an electron donating leuco dye and an electron receiving developer; specifically, a laser recording type heat sensitive recording element which contains, as the electron donating leuco dye, a leuco dye for absorbing a visible-light-region light and a leuco dye having a main laser-absorbing wavelength of at least 600 nm, and which is excellent in laser record adaptability and scanner-readability of a recorded image.

Laser recording type heat sensitive recording element

PROBLEM TO BE SOLVED: To provide a laser recording heat-sensitive recording medium having excellent laser recording suitability and scanner readability of a recording image. SOLUTION: The heat-sensitive recording medium comprises a heat-sensitive recording layer containing at least an optical absorption material for absorbing a laser beam to convert the beam into a heat, an electron donative leuco dye and an electron acceptive developer. In the medium, as the electron donative leuco dye, a leuco dye for absorbing the light of a visible light region and a leuco dye having a main wavelength of absorbing a light having a wavelength of 600 nm or more are contained.

Laser recording heat-sensitive recording medium

PROBLEM TO BE SOLVED: To provide a thermal recording body which is excellent in a tone of blue coloring and which can be read very well by a bar code reader in the case of being printed with a bar code and has high shelf stability. SOLUTION: The thermal recording body has a thermal coloring layer containing a colorless or light-colored basic leuco dye and an organic developer as main constituents and provided on a substrate. As to a color tone of a colored image in the thermal recording body, a color difference L* value, a color difference a* value and a color difference b* value stipulated in JIS-Z-8729 are made the L* value:25-40, the a* value:5-20 and the b* value:-30 to -40 respectively. The basic leuco dye is a black coloring dye of 3-di-n-pentylamino-6-methyl-7-anilinofluoran and a blue coloring dye of 3,3'-bis(dimethylaminophenyl)-6-dimethylaminophthalide or 3-(4-diethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindol-3-yl)-4-azaphthalide. COPYRIGHT: (C)2006,JPO&NCIPI

Takashi Date

Papers

Thermal recording material

Thermal recording medium

Laser recording type heat sensitive recording element

Laser recording heat-sensitive recording medium

Blue coloring thermal recording body