Heat-sensitive recording material having intermediate layer that contains hollow particles
申请人:SAIDEN CHEMICAL INDUSTRY CO., LTD.
公开号:US10300726B2
公开(公告)日:2019-05-28
The present invention provides a heat-sensitive recording body that is excellent in high-speed recording properties, that makes it possible to perform high-quality image recording with a high sensitivity even at a low thermal energy, and that is excellent in printability and economy. A heat-sensitive recording body containing a support, an intermediate layer, and a heat-sensitive color forming layer comprising as main components a leuco dye and a developer, the intermediate layer and the heat-sensitive color forming layer stacked on the support in the order as mentioned, wherein the intermediate layer contains a hollow particle containing a hollow core portion formed by drying a solvent for an alkali-swellable aqueous gel comprising a (meth)acrylic-based copolymer having an acid value of 200 to 400 mgKOH/g, and a resin portion encapsulating the core portion and having a non-alkali-swellable outermost layer of the particle, the non-alkali-swellable outermost layer formed using a hydrophobic monomer, and the hollow particle has an average particle diameter of 1.5 to 3.5 μm and a percentage of hollowness of 60 to 85%.
本发明提供了一种热敏记录体,它具有优异的高速记录性能,即使在低热能条件下也能以高灵敏度进行高质量图像记录,并且具有优异的可印刷性和经济性。一种热敏记录体,包含一个支撑体、一个中间层和一个热敏颜色形成层,热敏颜色形成层的主要成分是一种白色染料和一种显影剂,中间层和热敏颜色形成层按上述顺序叠放在支撑体上、其中,中间层包含中空颗粒,该中空颗粒包含通过干燥由酸值为 200 至 400 mgKOH/g 的(甲基)丙烯酸基共聚物组成的碱溶胀性水凝胶的溶剂而形成的中空核心部分,以及封装核心部分并具有非碱溶胀性颗粒最外层的树脂部分,非碱溶胀性最外层使用疏水性单体形成,且中空颗粒的平均颗粒直径为 1.5至3.5微米,空心率为60至85%。