thermal paper

基本介紹

• 中文名：熱敏紙
• 外文名：thermal paper
• 類型：紙
• 用途：熱敏印表機

熱敏紙

是由遇熱顯色的一種化學物質塗布在表面的紙張。它主要用於熱敏印表機上，特別是在一些輕便簡易的設備上，如添加機，收款機，和信用卡終端設備。

紙張的表面塗布物質為固態混合物與染料並排列為一個合適的矩陣-是無色螢光黃母體和十八烷基膦酸的組合。當加熱溫度達到矩陣熔點時，染料與酸反應，形成顯色，顯色後會在矩陣回歸原態前以一個相對穩定的狀態保存下來。

通常情況下，塗層加熱時會變成黑色。但有時也會使用藍色或紅色的塗層。

通常高檔熱敏紙會有一個保護活性塗層的保護層叫頂塗，作用如下：

*減少因接觸紫外線，水，油，油脂，豬油，油脂，增塑劑，和類似的原因造成熱圖像的衰落

*減少列印頭磨損

*減少或消除從熱敏列印頭的熱塗層的殘餘物

*提供更好的柔性版印刷油墨更好地適用於熱敏紙

*集聚熱敏列印頭的熱量於活性塗層上

熱敏紙主要用於熱敏列印設備，如POS印表機，收款機，和信用卡終端。熱敏紙卷塗有一種化學物質，接觸到加熱的列印頭時就會顯色。所以，熱敏紙並不需要墨水來產生圖像。

常見的克重：48gsm，55gsm，58gsm，60gsm，80gsm

英文原文

Thermal paper is paper that is impregnated with a chemical that changes color when exposed to heat. It is used in thermal printers and particularly in cheap, lightweight devices such as adding machines, cash registers, and credit card terminals.

Thermal POS Paper Receipt

The surface of the paper is impregnated with a solid-state mixture of a dye and a suitable matrix; a combination of a fluoran leuco dye, octadecylphosphonic acids as 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.

Typically the coating will turn black when heated. But coatings that turn blue or red are sometimes used.

Most direct thermal papers require a protective topcoating to:

* reduce fading of the thermal image caused by exposure to UV light, water, oils, grease, lard, fats, plasticizers, and similar causes

* provide improved printhead wear

* reduce or eliminate residue from the thermal coating on the thermal printheads

* provide better anchorage of flexographic printing inks applied to the thermal paper

* focus the heat from the thermal printhead on the active coating.