| 摘要 |
PURPOSE:To enhance a heat-insulation effect and to improve image quality and sensitivity by a method wherein an undercoat layer is mainly composed of an oil-absorbing pigment having an oil absorption more than a specific value, a specific latex is contained one half or more in a total adhesive, and the coating weight and density of the dried undercoat layer are in specific ranges. CONSTITUTION:In a thermal recording body having an undercoat layer between a substrate and a recording layer, the undercoat layer is composed of an oil-absorbing pigment having an oil absorption of 100cc/100g or more based on a JIS K 5101 method, 50wt.% or more of the total amount of an adhesive is a latex having a Tg point of 0 deg.C or less, the coating weight of the dried undercoat layer is 12g/cm<2> or more, and the density thereof is 0.75g/cm<2> or less. As the oil-absorbing pigment, a calcined clay or an amorphous silica is most preferably used because of its superior heat insulating properties and compressive elasticity. The composition of 50wt.% or more of the latex having a Tg point of 0 deg.C or less to the total adhesive realizes the effective action of the superior rubber elasticity and strong adhesion of the latex. In this manner, the pigment is bound on a substrate with a small amount of the adhesive without markedly deteriorating the void volume of the porous oil-absorbing pigment, and a thermal recording body with high image quality and high sensitivity can be obtained. |
