热 /超声打印机 - NSL UP-X898MD Sony(日本)

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    Ultrasound printer(或者直接热打印) is a数字印刷通过选择性加热涂层来产生印刷图像的过程thermochromic paper, 或者thermal paper众所周知,当纸张通过热量时print head。涂层转黑色的在加热的区域,产生图像。两颜色的直接热打印机可以打印黑色和额外颜色(经常红色的) by applyingheat在两个不同的地方温度RMAL转移打印是一种非常不同的方法,它使用热敏色带代替热敏纸,但使用类似的热打印头。

    热式打印机包括这些关键组件:

    • 热头:产生热量;在纸上打印
    • Platen: a rubber roller that feeds paper
    • Spring: applies pressure to the thermal head, causing it to contact the thermosensitive paper

    为了打印,对热敏感纸插入了热头和压板之间。打印机发送electric currentheating elements热头,产生热量。热量激活热敏纸的热敏着色层,在加热的地方会改变颜色。这种印刷机制被称为热系统or直接系统。加热元件通常被排列为一系列的紧密间隔点。

    纸张用染料的固态混合物和合适的基质浸渍。结合Leuco染料八烷基膦酸is an example. When the matrix is heated above its melting point, the dye reacts with the acid, shifts to its colored form, and the changed form is then conserved in metastable state when the matrix solidifies back quickly enough (a process known asthermochromism)。

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