DE1226612B - Carbonless material - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B41n

German class: 151-7 / 02

Number:
File number:
Registration date:
Display day:

1226 612
E27649VIb / 151 August 22, 1964 October 13, 1966

The present invention relates to carbonless materials and the like which can be made in a single operation without using a carbon paper result in several copies. Have carbonless materials of this type a colored reproduction layer (the "donor layer" or "release layer") on the back of the carrier sheet, while the front of the sheet is prepared for receiving the colored reproduction layer is (through a "recording layer"). If you put the back of such a sheet on the front of another such sheet and if one writes on the front of the former, one obtains on the Front of the lower sheet a copy of the writing.

In the patent application E 21947 VIb / 151 (German Auslegeschrift 1218 476) describes a copy material that has a donor layer on one side has a natural or artificial resin as a binder, at least one suitable for it Contains plasticizer, at least one finely divided inorganic filler and a dye. This donor layer has a microscopically specific structure, using a locally limited one Pressure on the other side of the copy material, the donor layer locally on a Receiving layer is transferred, which is a natural or artificial resin and at least one for it contains suitable plasticizer. If desired, the donor layer can be an organic fixative which contributes to the formation of the microscopically discrete structure of this layer.

It has now been found that when using tannic acid as an organic fixing agent in Carbonless materials according to patent application E 21947 VIb / 151 (German Auslegeschrift 1 218 476) a natural or artificial resin is no longer required as a binder, so that the donor layer of the present invention actually tannic acid, which acts as both a binder and a fixative serves, a non-volatile plasticizer for tannic acid, at least one finely divided inorganic Contains filler, a dye and, if required, an additive which softens the donor layer without having a solvent effect on the tannic acid.

The tannic acid can be in the donor layer in a content of 5 to 25 percent by weight, preferably from 15 percent by weight, based on the weight of the donor layer, are present. The ones used Plasticizers, inorganic fillers and dyes can be the same as those already in the Patent application E 21947 VIb / 151 (German Auslegeschrift 1 218 476) are described. As a plasticizing carbon copy material

Addition to registration: E 21947 VI b / 151 ■■ Auslegeschrift 1 218 476

Applicant:

Etablissement Consulting, Vaduz (Liechtenstein)

Representative:

M. Luther, lawyer,
Hamburg 11, Alter Wall 10

Claimed priority:

Great Britain September 18, 1963 (36 820)

ZO

the substance for the donor layer can, for. B. castor oil or ricinoleic acid can be used.

When intended, the carbonless material of the present invention in data processing machines with a magnetic or electrical sensing button, the carbonless for this purpose by incorporating a magnetic material, such as. B. magnetic iron oxide powder, be made suitable in the donor layer. The invention is based on the following examples are explained in more detail.

For example

A donor layer was prepared by vigorously mixing 50 parts by weight of a 25gewichtsprozentigen solution of tannic acid in alcohol (74 ° / ₀ hydrochloric denatured alcohol) to yield 85 parts by weight of a pasty mixture which was following by four times of rubbing ingredients in a three-roll mill, was prepared:

Parts by weight

Carbon black 1.70

Ethylene glycol monomethyl ether 11.95

Titanium white 33.15

Kaolin 15.30

Dibutyl phthalate 11.45

Castor oil 11.45

The resulting mixture was applied to a paper support sheet and dried.

«09 670/260

Claims (1)

3 4 One for use with the described donor weight percent of a low-melting polyether layer A suitable receiver layer can, for example, consist of lens, 56 percent by weight paraffin and 4 percent by weight -70 Weight percent polyethylene, 20 weight percent zinc oxide are produced. Stearic acid and 10 percent by weight paraffin. 5. .Patent claims: x> ρ · „· ι 9 I-copy material according to patent application pe _{dung E 21947} Y ₁₁ ^ J _{15 χ} ( _{German interpretation} A donor layer was created by vigorous mixing 1 218 476), characterized in that of 50 parts by weight of a 25% by weight that the release layer contains tannin, which is both Solution of tannic acid in 74% denatured «acts as a binding agent as well as a fixing agent. Alcohol and 85 parts by weight of a paste, which can be 2. Copy material according to claim 1, characterized in four times rubbing in a three-roll mill characterized in that the release layer contains the following ingredients: contains an additive that makes this layer softer "'Parts by weight makes a solvent black without affecting the tannin 1.70 15 effect. Ethylene glycol monomethyl ether, 11.95 3. Copy material according to claim 2, da- Powdered iron and / or mägne- characterized in that this additive table iron oxides 15.00 is castor oil or ricinoleic acid. Titanium white 18.15 4. Copy material according to one of the Käolin ΓΛ I .........'........'..... 15.30 a ° Proverbs 1 to 3, characterized in that as Dibutyl phthalate .... · ............. ·. 11.45 inorganic filler, optionally together Castor oil 11.45 with other inorganic fillers', a magnetic or magnetizable material is used. -The mixture obtained was "-" on a paper. 5. Copy material according to claim 4, da- carrier sheet applied; the dry application was 25, characterized by the fact that this was magnetic 5 to 6 g / m ² . 'or' magnetizable substance in an amount of Eiffe ¹ for ⁵ use with: the described encoder ^; 10 to 75 percent by weight, based on the A receiving layer suitable for the layer can be present from 40% dry weight of the release layer. "-. 609 670/260 10.66 © Bundesdruckerei Berlin