Abstract: A semipermeable membrane support having a thickness difference between measurement thickness at 0.80 N/cm2 and measurement thickness at 1.27 N/cm2 of 1.0 to 5.0% is excellent in adhesion to a semipermeable membrane and also adhesion between a raw water spacer and the semipermeable membrane and thereby can be expected to maintain high water permeability after modulation. A method of producing a semipermeable membrane support comprises the step of carrying out hot-press processing by using an elastic roll, which has(have) a hardness between a type A durometer hardness of 60 or more and a type D durometer hardness of 95 or less.

Abstract: A semipermeable membrane support containing polyolefin-based fibers, which can withstand repeated washing and backwashing, makes it easy for a semipermeable membrane component to permeate thereinto and difficult for the component to strike therethrough, and is excellent in adhesion to the semipermeable membrane and adhesion between a non-coating surface thereof and a resin frame. The semipermeable membrane support which is used by forming the semipermeable membrane thereon is a wet-laid nonwoven fabric containing core-sheath type conjugate fibers composed of polypropylene as a core component and polyethylene as a sheath component and has a burst strength of 300 to 1,000 kPa, or the Bekk smoothness and 75° mirror surface glossiness of the coating surface on which the semipermeable membrane is to be formed of the semipermeable membrane support being more than the Bekk smoothness and 75° mirror surface glossiness of a non-coating surface on the opposite side.

Abstract: Provided is a thermal recording material comprising an intermediate layer and a heat-sensitive recording layer for color formation by heat stacked in this order onto a support, the thermal recording material being characterized in that the intermediate layer contains a bellows-shaped hollow resin and that the roughness of the surface on the color forming side is 1.0 ?m or less as measured by Parker Print Surf. The method for producing such a thermal recording material comprises the steps of: applying a coating liquid containing heat-expandable resin particles to a support, drying the coated support at a temperature lower than the expansion starting temperature of the heat-expandable resin particle, and subjecting the coated support to thermoforming for formation of an intermediate layer; and applying, to the intermediate layer, heat-sensitive recording-related components which contribute to color formation by heat, for formation of a heat-sensitive recording layer.

Abstract: Provided is a thermal recording material comprising a heat-sensitive recording layer for color formation by heat and a protective layer stacked in this order on a support, the heat-sensitive recording layer containing an ethylene-vinyl alcohol copolymer, the protective layer containing a diacetone-modified polyvinyl alcohol and a crosslinker.

Abstract: Provided is a thermal recording material comprising an intermediate layer and a heat-sensitive recording layer for color formation by heat stacked in this order onto a support, the thermal recording material being characterized in that the intermediate layer contains a bellows-shaped hollow resin and that the roughness of the surface on the color forming side is 1.0 ?m or less as measured by Parker Print Surf. The method for producing such a thermal recording material comprises the steps of: applying a coating liquid containing heat-expandable resin particles to a support, drying the coated support at a temperature lower than the expansion starting temperature of the heat-expandable resin particle, and subjecting the coated support to thermoforming for formation of an intermediate layer; and applying, to the intermediate layer, heat-sensitive recording-related components which contribute to color formation by heat, for formation of a heat-sensitive recording layer.

Abstract: Provided is a thermal recording material comprising a heat-sensitive recording layer for color formation by heat and a protective layer stacked in this order on a support, the heat-sensitive recording layer containing an ethylene-vinyl alcohol copolymer, the protective layer containing a diacetone-modified polyvinyl alcohol and a crosslinker.

Abstract: A thermal recording material having a thermally color-forming thermal recording layer and a protective layer which are formed on a substrate in this order, wherein the protective layer is a layer obtained by applying an aqueous coating liquid containing a polyvinyl alcohol, a crosslinking agent, a pigment, an Arrhenius acid and a volatile amine onto the thermal recording layer and drying the applied coating liquid.

Abstract: A thermal recording material having a thermally color-forming thermal recording layer and a protective layer which are formed on a substrate in this order, wherein the protective layer is a layer obtained by applying an aqueous coating liquid containing a polyvinyl alcohol, a crosslinking agent, a pigment, an Arrhenius acid and a volatile amine onto the thermal recording layer and drying the applied coating liquid.