SU978096A1 - Electrographic material - Google Patents

Description

The invention relates to electrography, in particular to methods for producing electrographic papers of both electrostatic and electrophotographic papers, which are the information recording medium.

Electrographic material is known, consisting of a paper base of an electrically conductive underlayer based on plielectrolytes and a dielectric or photo semiconductor layer | one.

A disadvantage of the known electrographic material is low electrical conductivity.

The purpose of the invention is to improve the physico-electrical properties of the material by increasing the electrical conductivity of the electrical conductive sublayer.

This goal is achieved. In fact, in the well-known electrographic material consisting of slits from a paper base, an electrically conductive underlayer based on polyelectrolytes and a dielectric or photosemiconductor layer, a polyelectrolyte based on polydimethyldiallyl-ammonium - ..yuchloride with a resistance of 1, -1, 4-10 OMSM is used in the interval relative humidity of 30-90%.

Example. Using an appropriate watering machine, apply a 5-10% aqueous solution of polydimethyldiallylammonium chloride onto the paper substrate on one or both sides. As a paper basis, for example, writing paper / base paper of electrostatic, electrophotographic

10 or electrochemical paper.

. The change in volume-specific electrical resistivity with the resulting time-conducting electrically conductive paper depending on

15 the amount of deposited polymer electrolyte and the relative humidity of the environment are presented in the table. The use of a 5% solution of electrically conductive poly20 corresponds to the mass of the applied layer (3 r / t.

II p and m e p 2. Production of electrically conductive paper with a covering layer.

25

Using an appropriate watering machine, an aqueous suspension of the following composition is applied to the paper base,%:

Polydimethyldiayl30

ammonium chloride 5-10

Polyvinyl alcohol, krs1hmal or dextrin1 / 5-4

Kaolin. 10-20

Sodium pyrophosphate 0.05-0.2

Voda70-80

When the mass of the applied layer is 3 g / m volume, the specific electrical resistance of electrically conductive paper with a covering layer in the relative humidity range from 50 to 80% varies from 510 to 5 10 10 OMSM.

Froze Production of electrostatic paper.

A layer consisting of polyvinyl butyral or another polymer dielectric (60-75%) and the filler - barium sulphate or titanium dioxide () is applied onto the obtained paper base (example 1 or 2) using an appropriate watering machine. The solvent is ethyl alcohol, a mixture of ethyl alcohol and toluene, or other mixtures of organic solvents. The mass of the layer is 9 4 ROME e p 4. Production of electrophotographic paper.

Using the appropriate watering machine, zinc oxide is applied to the obtained paper base (Example 1 or 2) from a suspension of the following composition,%: Zinc oxide 85-90

Polyvinyl butyral

brand LA or LN 10-13

Nitrosodiphenylamine, 25

Bromphenol blue 1.

Fluorescein 0,006

The solvent is a mixture of ethyl alcohol and toluene. The mass of the applied layer is 25-30 g / s.

The electrorum drive paper described in Examples 1 and 2 weakly changes its electrical properties in a wide range of relative humidity of the surrounding medium, is white, does not stick, and does not curl.

Electrostatic and electrographic printing on paper obtained as described in examples 3 and 4, allows to obtain high quality products.

Thus, the use of polydimethyldiallylammonium chloride with a volume electrical resistivity of 1, 1, .410 ohm "cm in the manufacture of electrically conductive paper at a relative ambient humidity of 30-90% and a mass of applied polymer layer of 3 g / m allows low consumption of electrically conductive polymer to obtain electrostatic and electrophotographic paper, suitable for the production of high quality printed products.

10 .10 1.6-10

8 7 5 1,110 1,0 10 The polymer obtained by the method of 9.1-10 2.31010 (5) 10

1,4-10® 1,3 10

3.5 g 10

6.4 10

, 4 8.8. iO

1.4-10

four

1, 1.1 LO

1.7 "10 3.6.10 4.4-10 8.0-U

invention formula

Electrographic material consisting of a paper base / electrically conductive underlayer based on polyelectrolytes and a dielectric or photo prepacked layer, characterized in that, in order to improve the physical-electrical properties of the material by increasing

conductive conductive.

sublayer, use polyelectrolyte. on -based polydimethyldislimammonium chloride with a resistance of 1, 4 "U M-cm with a ratio of-; , vlgikno tn 30r9G%. Information sources,

taken into account in examination I 1. U.S. Patent 3,544,318, class 95-1,5,

1970.

Claims (1)

Claim Electrographic material consisting of a paper substrate, electric wire ¹ sublayer based polyelectrolytes and photosemiconductor or dielectric layers of tlichayuschiysya in that, in order to improve physical and electrical properties of the material by increasing the conductivity of the electrical conductive, the underlayer, use a polyelectrolyte to -osnove polidimetildiallilammoniyI chloride resistance of 1.1 × 10 ®-1,4 '1oAjm'<cm at The ratio _range; 5 relative humidity 30–9%.