DE1546385B2 - HEAT-SENSITIVE RECORDING MATERIAL - Google Patents

Claims (2)

1 "';" 2 J PatentansDriiche · with a water-soluble heavy metal salt, the' metal cation of which forms a colored sulfide. 1. Heat-sensitive recording material, the thiourea decomposes when exposed to heat from a carrier and a suspension on it, releasing sulfide ions that are associated with the brought heat-sensitive layer, adding 5 metal cations to a water-insoluble, dark characterized in that the heat-colored sulfide react. The ionizing reaction-sensitive A layer of water that is not or only · soluble thiourea derivative, which is contained in a layer that is sensitive to water. Insoluble or only sparingly soluble heavy metal salt The reactivity therefore depends on this as well as paper that is non-volatile at room temperature from the external ones that prevail during storage Contains acid. . Conditions such as B. the humidity, from. Above- 2. Heat-sensitive recording material this is also the recording layer per se Claim 1, characterized in that it is sensitive to water, since all the heavy metal salts contained in it are water-soluble as components of a heavy metal soap. is turned. . 15 In order to avoid all of these disadvantages, According to a heat-sensitive recording object of the present invention, a material is proposed which consists of a support and a heat-sensitive recording material for an annealing heat-sensitive layer applied thereon needle registration devices. The heat-sensitive layer has been used for a long time for graphic 20 water insoluble or only sparingly soluble heavy metal recording of electrical or mechanical salt, in particular a heavy metal soap, the pulses of which so-called glow needle recorder metal cation forms a colored sulfide, and one at turns. The glow needle - a movably arranged, room temperature non-volatile acid containing
Electrically heated pen - is usually via a tape- An embodiment is given below: Shaped recording material guided in which 25 3 ₅ parts by weight of ethyl cellulose,
this at the points touched by the needle under _{10 0} parts by weight of lead stearate,
the influence of heat produces a quivering visible _{loss of Q1 parts by} weight of oxalic acid,
change is caused. The used _{10 0 Ge} parts by weight of kaolin and
heat-sensitive register papers are therefore 40.0 parts by weight of acetone
also known as glow needle papers. 30, ^. _v , Such heat-sensitive recording papers are processed in a ball mill for about 3 hours. already known in large numbers. In one execution meal. form will be a dark carrier material with a light _{10 0} parts by weight of diphenylthiourea in colored, opaque, mostly waxy sub- _{26 4} parts by weight of acetone punch covered, which under the influence of heat 35 becomes transparent. These papers have the disadvantage of being loosened or loosened and the ones listed above that the heat-sensitive layer pressure, wipe and mass after the rub time specified above in the Is scratch-sensitive, so the records easily added ball mill. The united mass is still become illegible. Rubbed for 15 to 20 minutes and in itself known In another embodiment of heat-4 ° way. On a suitable carrier, z. B. opaque sati- sensitive recording paper contains the recorded base paper with a weight of 45 g / m ² , nation layer one or more substances that are also applied. In the case of the recording material according to the invention, are able to react with each other under the influence of heat with coloring. The color is here, at least one of the reaction components does not melt from the beginning, but is only formed at 45 by the reaction during the recording process on the recording process. the impact of heat. This makes it easier for the reaction components to come together. At the same time the temperature is in an inactive state, the melt also forms the reaction medium for the not already in storage due to premature color reaction. The reactivity depends on the reaction a discoloration of the papers occurs. This is independent of the 5 ° storage conditions. The recording is generally made by a physical separation layer is also resistant to the influence of the reaction components, such as exposure to moisture, since the reaction components in different layers or chemical inactivation, water are not or only sparingly soluble,
z. B. achieved by adding masking agents. The addition of a non-volatile organic acid On the other hand, the color reaction when exposed to 55 stabilizes the thiourea derivative and increases the heat as quickly and evenly as possible. If the material can be stored. The many heat-sensitive color reaction registration recording material according to the invention changes color even after long paper is particularly the first-mentioned condition rem on not preserve at higher temperatures and - no discoloration during storage - is therefore only insufficiently fulfilled for use in areas with. 60 ideally suited to a tropical climate, especially since it is The aim of the present invention is to provide moisture resistance. of a pressure- and smudge-proof, heat-sensitive The recordings are clear and sharp and Recording material that is clear, uniform and cannot be blurred by pressure Records provides and that adequate. The inventive thermosensitive shelf-life owns. 65 Drawing material has a good shelf life. It has already been suggested for heat-sensitive enough to also be able to quickly change things Copy and recording paper to record thiourea or pulse and can therefore also be used for any type of a water-soluble thiourea derivative can be used in connection with glow needle recorders.