JPS6286366A - Transparent paper for electrostatic recording - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical field This book 5F, Akira, relates to transparent paper for electrostatic recording,
In particular, it has extremely excellent characteristics such as hook-up printers and high-speed printers. This invention relates to transparent paper for electrostatic recording on which an image is formed.

Transparent paper made by impregnating IuL-FA paper with resin has a certain degree of expansion and contraction,
It is useful as a substrate for transparent paper for electrostatic recording because of its tear strength and water resistance. In order to use it as a transparent recording paper for electrical recording, it is necessary to lower its volume resistivity to an appropriate range. However, with conventional methods, it is difficult to reduce the volume resistivity to the desired value due to scratches and environmental conditions. !
1. Image quality deteriorates significantly, especially at high M degrees or low humidity.

In other words, the transparent paper used for arrangement purposes is more desirable, but in this case, the air permeability is also high (conventional 91 ie
However, the resistance value cannot be lowered sufficiently. On the other hand, if the resistance is easily lowered, the transparency is low and there is a problem in its practical use as a transparent paper.

Purpose-C1 The present invention is to solve the above-mentioned conventional drawbacks, and more specifically, it is an object of the present invention to solve the above-mentioned conventional drawbacks.
having transparency and reducing the volume to the desired volume paper IA value;
: The purpose of the present invention is to obtain a transparent paper for electrostatic recording, and to obtain a high-quality image without deteriorating the image quality in the environment using such a transparent paper for recording. )-1) A temperature 300saC
After conductive treatment is applied to the resin-impregnated transparent paper under the I base, a dielectric tA layer is applied. l
? There is a transparent paper for recording because it is called an abstract.

As mentioned above, the electrostatic recording J filter 1 μm and the transparent recording Mi were subjected to conductive treatment 1 to 1 using the double-sided control method.
The resistance of h must be low and not <7. As method (b), for example, the conductive agent is dissolved in water or any other solvent and re-impregnated. - (There is a method to reduce the volume resistance, but in this method C, if the air permeability is not low, the conductive agent will be able to fully penetrate Ug' and the resistance value will be lowered sufficiently.) The result is a bond that makes it difficult to see images.

According to the research conducted by the present inventors, if the air permeability is 300 seconds or less, the volume resistance can be easily reduced by the conductive treatment method, and there is a volume resistance vessel that can be sufficiently applied to electrostatic recording using the double-sided control method. I found out that I can get it. Now, a resin-impregnated type of transparent paper with an air permeability of R17 is re-impregnated with a conductive agent. After reducing the volume resistivity to the desired value (In), a dielectric layer is formed.After the conductive treatment, the surface of the transparent paper,
By disposing a conductive layer on a large surface, the electrostatic recording properties can be further improved. 3. Transparent paper and 1. Practical 1 even with transparency Lt50sec or more
] 1, but it is more desirable if it is 60% or more -1.

Describing in detail the method for producing the electrostatic recording paper of the present invention, resin-impregnated transparent paper generally has high transparency and high air permeability, with a transparency of 60% and an air permeability of 3o.
It is difficult to apply F to J transparent paper that meets conditions of osec or higher. However, the present inventors' investigation revealed that, for example, transparent paper hammer grease of Silver Inmane 1 satisfies this condition 1'1. Therefore, according to the present invention, a resin-impregnated type of transparent paper is first impregnated with an IS agent.

As conductive agents, cationic conductive agents such as quaternary anionium salts, phosphonium salts, etc. are used, and anionic conductive agents are used. Impregnation d is obtained by dissolving in a medium or mixture of .

The solid content of the impregnating liquid is preferably 5 to 15% culm, and if it exceeds 15%, it will be impregnated into a transparent body. In addition to this, the non-volume resistivity value becomes too low and the high-humidity image density 'IjiM' continues to deteriorate.

Further, the volume resistivity cannot be lowered to the desired value by impregnating with 5% J or less, and it is difficult to form a good<7 image at low humidity +1'+.

By applying a conductive layer to the front and back sides of 14 pieces of transparent paper impregnated with a conductive agent, it is possible to change the appearance of the image, so it is possible to form a conductive layer depending on the machine to which it is applied.

After the above-mentioned treatment, the transparent paper is subjected to +Yarender treatment, and a dielectric layer is provided as a recording layer. The dielectric layer is an insulating ↑1 layer that holds a latent image charge, and is mainly composed of an insulating resin, and has desired practical properties such as matteness, writability, and imprintability on the surface of the recording layer. Depending on the situation, auxiliary ingredients may be added.

Examples of insulating resins include alkyd resin, silica resin, J-boxy resin, melamine resin, phenol resin, Boristi-1 non resin, vinyl chloride resin, vinylidene Jn resin, vinyl chloride/vinyl acetate polymer resin. , styrenated alkyd resin, styrene-butadiene copolymer resin, polyaretal resin, polybutyral resin, saturated or unsaturated polyethylene sprue resin, polyurethane resin,
Acrylic acid resin, methacrylic acid resin, maleic acid resin, etc. are used.

Auxiliary components include oxides, hydroxides, carbonates, sulfates, halogen compounds, and silica, alumina, etc. of 1ITi lead, titanium, magnesium, calcium, and aluminum.
Inorganic powders such as bentonite, arabaldi 1 phyto, kaolin, calcined calcium silicate] and organic-treated powders of these inorganic powders are used.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples 1-2. Comparative Examples 1 to 6 The following resin-impregnated transparent paper substrate was used as a transparent paper in 1 no-grease from Lars Inn 1 (Example 1.2 Comparative Example 1.2).

In addition, as Comparative Examples 3 to 6, the following general transparent papers with different marks of low transparency but with different markings were used.

Hammer Grease (thickness 60 to 707z) Example 12 Comparative Example 12 Transparency (%): 6063 G571 Air permeability (seC); 96 236 771
o.

General transparent paper (70μ) Comparative example 3 'I 5 6 Transparency (%): 47 53 5! i
61 Air permeability (SeC): 122280500c Force Conductive agent (11 mist 1-5500) on the above 8 types of transparent paper
is dissolved in methanol and the impregnation h1 during drying is 2 to 3 Q/am.
Impregnate with a wire bar from the surface side of the transparent paper so that the amount becomes 2. Next, the transparent paper was impregnated from the back side with a wire bar to an impregnation amount of 2 to 3 g/cm2, and then dried.

1. After applying the trender, the following dielectric layer is provided on the front side of the transparent paper.

Copolymer resin 1 containing methacrylate-1 as the main component
0 parts and 80 parts of h-luene were dispersed in a grain mill, and the drying time n1ffi was 5:! -1 g/cm2 and dried. An image was recorded on the electrostatic recording paper thus obtained using an electrostatic printer Benson 9211 with double-sided control system, and the image was evaluated. The results are shown in the table below.

Image density was measured with Macbeth R['), -514.

The image quality was determined by viewing 11 recorded images.

○: Good, Δ: Poor, ×: Bad As shown in the table, air permeability tα 300 sec or less, transparency 60
% or more of the inventive sample (Example 1.2), the environmental properties, transparency, image i! ! 151 high-quality images with minimal background stains soaked in hemp were created. In Comparative Examples 3.4, the environmental characteristics of the image were relatively good, but the transparency as a transparent paper was somewhat poor, so the overall hiI' value was indicated as Δ.

As described above, the present invention uses a transparent paper as a substrate that has sufficient transparency and can be easily reduced to a desired volume resistivity by impregnating it with a conductive agent liquid, thereby making it possible to withstand high humidity. ,
Forms a good 71 image in both low humidity and environmental performance.
A transparent paper for electrostatic recording with excellent rt can be obtained, and its practicality is extremely high.

Patent applicant: Ricoh Co., Ltd. Agent Patent Attorney Hidetake Komatsu Agent Patent Attorney Hiroshi Asahi 110-

Claims (1)

[Claims] A transparent paper for electrostatic recording, characterized in that a resin-impregnated transparent paper with a transparency of 60% or more and an air permeability of 300 seconds or less is subjected to conductive treatment and then provided with a dielectric layer.