SU957160A1 - Material for electrostatic data recordin - Google Patents

Description

   . The invention relates to a technology for the manufacture of materials for recording information by an electrostatic method. A known material for electrostatic recording of information, consisting of a paper substrate impregnated with inorganic salts, an electrographic layer representing a psakhimerny film, and deposited on the reverse side of an electrically conductive layer consisting of a polymeric binder and an electrically conductive filler, such as atomizing. The second powder, or soot, is taken in an amount of 8-12% by weight of bindings of the straps 1. Known material does not provide a sufficient reading of the recorded information and can be used only with recording speed on it is uneven in format and decreases dramatically with recording pulses of at least 1OO μs, and this, in turn, is due to the use of inorganic salts in the paper substrate, which creates a considerable heterogeneity of the material’s material properties and does not provide sufficient electrical conductivity basis. The closest to the invention in its technical essence and the achieved positive effect is an material for electrostatic recording of information, consisting of a paper substrate, electrically conductive, containing nomiMepHy binder and electrically conducting filler, and an ectrographic substrate containing polymer bonding and dielectric pigment 2. The conductive layer of this material contains as a polymer bond a latex terpolymer of butadiene styrene and an unsaturated polycarboxylic acid, and as an electrical conductor of a fused filler, an alkali metal silicate at the following ratio of components, May. including: polymer binder tce 100, filler 43-233. Electrographic layer of material contains butadiene rubber as a polymer binder, and iWHKa oxide as a dielectric pigment, in the following ratio of components, May. including: binder 100, pigment 800. When using this material in electrostatic printing devices of field geophysical equipment operating under conditions of significant fluctuations of ambient humidity, the readability of the information is insufficient because the image contrast is not uniform due to the fact that this material’s ability to perceive and to maintain an electrostatic charge depends on the relative humidity of the guezduh, which can vary within wide limits. The recording speed on such material is low, since The specific surface conductivity of the electrically conductive layer in the material does not exceed. The purpose of the inventive concept is to improve readability and increase the writing speed. . . The goal is achieved by the fact that in the material for. electrostatic recording of information consisting of a paper substrate, an electrically conductive layer containing a polymeric binder and an electrically conductive filler, and: an electrographic layer containing a polymeric binder. and dielectric, pigment, electrically conductive polymer as a polymer binder containing vinyl resin, carbamide resin, phenol formaldehyde resin, ethyldellulose, or mixtures thereof, and carbon black as a filament with the following ratio of components, wt .: polymer binder 100, fill-. Tel 50-2000, electrographic layer additionally contains a mixing agent selected from the group. Comprising citric acid, oxalic acid, metanitrobenzoynuyu acid, phthalic anhydride, maleiiovy anhydride or N -i -nitrozodifenilamin, and as the polymeric binder comprises a mixture of urea or phenol formaldehyde resin or ethylcellulose polivtshlbutiralem with the following component ratio, May, h .: polymeric binding 100, dielectric pigment 1OO-1OOO and a cross-linking agent O, .5-5.0 In the proposed material for electrostatic writing of information, the effect of improving the countability is achieved due to of the electrophysical properties of the electrographic layer, which is due to the use of a mixture of an urea or phenol-formaldehyde resin with polyvinylbugiral or ethylcellulose and the addition of a cross-linking agent to the layer, as a result of which a dense structure of the electrographic layer is impermeable to penetration of the moisture layer, resulting in a dense layer of moisture, impermeable to moisture, and a moisture-resistant layer. The use of an electrically conductive layer as a conductive filler of carbon black eliminates the effects ambient humidity. medium during the layer charging process, which also increases the readability of information and provides the necessary electrical conductivity for recording at the minimum duration of the recording pulse and, therefore, at high speed. The conductive layer may additionally contain a plasticizer, such as dibutyl phthalate, dibutyl sebacate, glycerin in an amount up to 25% by weight of a completely dry binder to increase the plasticity of the layer in order to prevent its cracking. As a dielectric pigment, the electrophotographic layer may contain titanium dioxide, zinc oxide, silica, barium sulfate, kaolin, talc, zinc stearate, or a mixture thereof. Alcohol, toluene, ethyl acetate, or their mixtures with water can serve as solvents for the suspensions of the electroconductive and electrographic layers. Polyvinyl butyral and vininyl ethyl can be used as vinyl resins, as urea: melamine formaldehyde resin and urea formaldehyde resin as resins. The proposed material for electrostatic recording is made as follows. A suspension of an electrically conductive layer of Maccoii 1-5 is applied successively onto a paper substrate on a watering installation; after drying, an electrophotographic layer weighing 8-20 is dried and dried again until the solvents are removed. The image on the resulting material is formed by charging the corresponding sections of the material and the subsequent manifestation of toner particles capable of attracting to the charged areas.

Prim, er 1. In a ball mill for 10 hours, a suspension of an electrically conductive layer is dispersed, containing, m.h: ethyl cellulose 100; carbon black (grade DG-100) 50; Ethyl alcohol 80O and suspension of the electrographic layer, containing, in May. h: binder 100 I carbamide resin (grade-K-421-02) 70 and polyvinyl butyral ZO); titanium dioxide 1OO; citric acid 0.5, ethyl alcohol 500; toluene 5OO. In a laboratory watering installation with a roll roller, a suspension of an electrographic layer with a mass of 3 g / m is applied and demolished onto a paper substrate, and then a suspension of an electrographic layer with a mass of 2O g / m S Example 2. The material for the electrostatic recording is made According to a technology similar to Example 1, this slurry of an electrically conductive layer contains, May. h: bonding 1OO (carbamide resin 80; polyvinyl butyral 2O); eazha (brand PM-4O1-1) 200O; ethyl alcohol 1OOOO; and the suspension of the electrophotographic layer comprises May. h: evo 10U; urea emola (grade K-411-02 sat) 80; iolivinyl butyral 2O; barium sulphate 1OOO; methanite robenzoic acid 5; toluene 5OOO. The Maeea conductive was 3 g / m and the electrophotographic was 20 g / m. Example 3: The material is manufactured according to a technique analogous to Example 1, wherein the electrically conductive suspension contains mAh: polyvinyl butyral 100; eazha (marks DG-YuO) SO dibutyl phthalate 25; ethyl alcohol 55O

the slurry of the electrographic layer contains m.h.: binder 100 (melamine-formaldehyde emol (grade K-421-O2) 25; polyvinyl butyral 75); zinc oxide 40O; zinc stearate 100,4-nitro-zodiphenylamine 2.6; ethyl alcohol 3000; the mass of the electrically conductive layer is 3 g / m and the electrographic layer is 20 g / m.

PRI me R 4. The material is manufactured according to a technology analogous to Example 1, with a siTOM slurry of an electrically conductive layer comprising May. h: urea emola (grade K-421-O2) 1OO; sales (mark ПМГ-33) 200; dibutyl sebacate

15; toluene 150O, and the slurry of the electrographic layer contains mac.h: a 1OO binder (urea-formaldehyde resin (grade K-411-O2) 60 and polyvinyl chloride)

Nilbugiral 40), titanium dioxide 450; kaolin 250; phthalic anhydride 1, O; ethyl alcohol 20OO; ethyl acetate is 2OOO, the mass of the electrically conductive layer is 3 g / m, and the mass of the electrographic layer is 20 g / m.

PRI me R 5. The material is manufactured according to a technology analogous to Example 1, wherein the suspension is electrically conductive and contains, mac; ethyl cellulose 4O; phenol formaldehyde resin (brand

CFF-106) 6O; soot (grade DG-100) 60O; ZOOO ethyl alcohol; and slurry. Electrographic layer contains m.ch: Evuyuschu 1OO (phenol-form resin (brand FL-326) 8O and

EXAMPLE 7: A known material is manufactured according to a technology similar to Example 1, wherein the suspension of the electrically conductive layer contains mac.ch .: latex of a terpolymer of butadiene styrene and itaconic acid 10O; elikat "(atri 10O; e-suspension of the electrographic layer contains May, including: styrene butadiene rubber 10O; zinc oxide 8OO; toluene 45OO. The mass of the electrically conductive layer is 3 g / m, the mass of the electrographic is 2 O g / m.

The test results for examples 1-7 are shown in the table. ethyl cellulose 20); silicon dioxides 30; talc 30; titanium dioxides 90; oxalic acid 0.6, toluene 7O; ethyl acetate ZOO. Maea conductive layer 3 g / m, and the mass of electrographic eo 2O g / m PRI me R 6. The material is made according to the technology similar to example 1, while the suspension electrically conductive layer contains, May. including polyvinyl ethyl 60; ethyl cellulose 40; sales (brand ПГМ-33) 500; glycerin 10; ethyl alcohol 25OO; and the slurry of the electrophotographic layer contains, May. b .: binder 10O melamine formaldehyde resin (grade K-421-O2) VO and polyvinyl butyral 20), titanium dioxide 2OO; silicon dioxide 1OO; maleic anhydride 0.8; toluene 1500; ethyl alcohol 5OO. The mass of the electrically conductive body was 3 g / m and the mass of the electrographic layer was 20 g / m ×

Proposed

i8.3-10 8.3-10

3.2105 3.2-105.

1.6-10 1.6-10 4.8-10 4.8-10 2.3-10 2.3-1O

5.7-U 5.7-10

6

Famous

, 9 lu

4.2-10 ™ 3.7-10

8400

7. From the table it can be seen that the proposed material has a significantly greater stability of the electrophysical properties at different ambient humidity and provides a recording of information 40-230 times higher than the known ... Formula, inventions Material for electrostatic recording, information consisting from a paper substrate, an electrically conductive layer containing a polymeric binder and an electrically conductive filler, in an electrographic layer containing a polymeric bond: general and dielectric pigment, characterized in that In order to improve readability and increase the writing speed, the electrically conductive layer as a polymer binder contains vinyl resin, urea resin, phenol formaldehyde resin, ethylcellulose, or a mixture of these, and

658

585

74 as a filler contains carbon black in the following ratio of components, May. including: polymer binder tse 10.O; the 5O-2OOO filler, and the electrophotographic layer additionally contains a cross-linking agent selected from the group containing citric acid, oxalic acid, methanitrobenzoic acid, phthalic anhydride, maleic anhydride or N -nitrosodiffeschamine, and as a polymeric binder, a carbon amide or phenol shenolitol or phenol-phenol mixture, or phenol-phenoxyshamine. Maldehyde resin with polyvinyl butyral or ethylcellulose in the following ratio of components, May. h: polymeric binder 1OO, dielectric pigmesh-10O-1000 and a crosslinking athene 0.5-5.0. Sources of information taken into account in the examination 1. USSR author's certificate number 193,300, class OZ & 5/04, 1965. 2. US Patent No. 3,469,977, cl. Q03G 7/00, publ. 1969 (prototype). .

Claims (1)

Claim The material for electrostatic recording, information consisting of a paper substrate, a conductive layer ⁴⁰ soder- zhaschego polymer binder and electrically conductive filler, and the electrophotographic layer comprising a polymeric binder and dielectric pigment by L and h as yuschiysya in that, with a view to improving ⁴⁵ readability and increasing the recording speed, the conductive layer as a polymeric binder comprises a vinyl resin, urea resin, phenol-formaldehyde ^'50 resin, ethylcellulose or mixture thereof and as a fill I contains carbon black in the following ratio, May. hours: polymer binder 10.0; filler 50-2000, and the electrographic layer additionally contains a crosslinking agent selected from the group comprising citric acid, oxalic acid, methanitrobenzoic acid, phthalic anhydride, maleic anhydride or N-nitrosodiphenylamine, and as a polymeric binder contains a mixture of urea or phenol-formaldehyde resin with poly or ethyl cellulose in the following ratio, May. h: a polymeric binder 100, a dielectric pigment 100-1000 and a crosslinking agent of 0.5-5.0.