JPS589937B2 - Diazo fuchsia - Google Patents

Description

Detailed Description of the Invention The present invention provides a diazo copying material comprising a support, a precoat layer formed on the support, and a photosensitive layer, which has the following general formula (D A diazo copying material characterized by preventing two or more copying materials from coming into close contact with each other by supporting at least one of betaine and (n) oxyethylene phosphate derivatives. Regarding.

In the above formula, R is an alkyl group or an aralkyl group.

In the above formula, R1 is an alkyl group or an aralkyl group, and R2 is hydrogen, an alkyl group, an aralkyl group, or (CH2C
H20) n1-R4 (R4 is hydrogen, an alkyl group or an aralkyl group, n1 is an integer of 1 to 7) R3 is an amine group, an alkylamino group or a carbamoyl group, n is an integer of 1 to 7 It is.

A diazo copying material is one in which a photosensitive layer is provided on the surface of a support. Paper, cloth, film, etc. are used as the support, and the photosensitive layer mainly contains a diazo compound or a diazo compound and a coupling component. It is well known that it is contained as a component.

Furthermore, in order to improve the sharpness and density of dye images formed on such diazo copying materials, it has been practiced to provide a precoat layer between the support and the photosensitive layer.
The components of this precoat layer include fine particle silica, alumina, aluminum silicate, starch, and fine synthetic resin powder, and the binders include casein adhesive, polyvinyl acetate, polystyrene, acrylate, methacrylate, etc. It is also well known that aqueous dispersions of .

The provision of such a precoat layer allows two or more sheets of copy material to come into close contact with each other.

Generally, diazo copying materials are made by stacking dozens of sheets.
When making copies, a feeding device such as a rubber roller sends out one sheet at a time, but as mentioned above, if friction occurs between the copying materials and they tend to come into close contact, two or more sheets of copying material may come into close contact with each other. It becomes impossible to send out each sheet smoothly.

In this specification, feeding the copying material as described above is referred to as paper feeding, but if the copying material tends to stick together, the paper feeding condition deteriorates.

The present invention has been made to eliminate such defects, and as described above, the present inventors have proposed that at least one of vequin or oxyethylene phosphate derivatives
It has been discovered that by carrying seeds on one or both sides of the support of the copying material, it is possible to prevent the copying materials from sticking together.

The present invention is based on this discovery, but in order to support betaine or oxyethylene phosphate derivatives on a copying material as described above, these components are mixed into a precoat layer forming liquid or a photosensitive layer forming liquid. Alternatively, in order to prevent the copying material from curling, it can be achieved by mixing it into a back coating liquid applied to the back side of the support and applying these liquids to the support. The amount of betaine or oxyethylene phosphate derivative used varies depending on the components used in the precoat layer and their amounts;
The purpose can be achieved by using in the range of 0.1 g to 1.5 g per portion.

Examples of the present invention are shown below.

After dispersing silica in 60 parts by weight of water, the above oxyethylene phosphate derivative and polyvinyl acetate emulsion were added and stirred well, and then 26 parts by weight of water was added to prepare a precoat layer forming liquid.

A photosensitive layer forming liquid was prepared by mixing the above components.

The precoat layer forming liquid prepared as described above was applied onto a white base paper for copying material and dried.

In this case, the precoat layer has a dry weight of base paper 17y12
It was adjusted to about 5g per serving.

Next, using the above photosensitive layer forming liquid, it was applied to a dry weight of about 1.5 g per base paper In, and dried to obtain a diazo copying material, which was cut into A-4 size and used for a paper feeding test. there was.

The paper feeding test was conducted as follows.

The copy material cut as described above was loaded into a Ricoh Auto Feeder S manufactured by Ricoh Co., Ltd., and 1,000 sheets were fed out.The number of sheets fed out one by one in order was determined, and the paper feeding performance was expressed as a percentage.

The feeding performance of the diazo copying material prepared as described above was 100%.

For comparison, a paper feeding test was conducted in the same manner using a comparative diazo copying material prepared by repeating the same procedure as above except for using a precoat layer forming liquid that does not contain the oxyethylene phosphate derivative. However, the paper feeding performance in this case was 52.5%.

Example 2 A precoat layer forming liquid was prepared by mixing the above components.

As described above, a diazo copying material was prepared by repeating the exact same procedure as in Example 1, except that a precoat layer forming solution using betaine was used instead of the oxyethylene phosphate derivative in Example 1, I did a paper feeding test.

In this case, the paper feed completion was 99.9%.

After dispersing the silica in 60 parts by weight of water, add the polyvinyl acetate emulsion and stir well.
A precoat layer forming solution was prepared by adding 7 parts by weight.

A diazo copying material was obtained by the same procedure as in Example 1 using the above precoat layer forming liquid and the photosensitive layer forming liquid used in Example 1.

A back coating liquid obtained by mixing the following components was applied to the back side of this copying material and dried to obtain a diazo copying material having an oxyethylene phosphate derivative supported on the back side.

A paper feeding test was conducted on the copy material obtained as described above in exactly the same manner as in Example 1, and the paper feeding result in this case was 99.8%.

The diazosol obtained by repeating the same procedure as above was used, except that the back coating liquid did not contain any oxyethylene phosphate derivative and was composed of 10 parts by weight of ethylene glycol and 99 parts by weight of water. A paper feeding test was similarly conducted for copying materials, and the paper feeding performance in this case was 53.8%.

The above components were mixed to obtain a back coating liquid.

A sample was obtained by repeating the exact same procedure as in Example 3, except that instead of the back coating solution containing the oxyethylene phosphate derivative used in Example 3, a back coating solution containing betaine was used as described above. A paper feeding test was conducted on the diazo copying material, and the paper feeding performance in this case was 100%.

The above components were mixed to prepare a precoat layer forming liquid, a photosensitive layer forming liquid, and a back coating liquid, respectively. Examples 1 to 4
A diazo copying material was obtained according to the procedure shown in 1. A paper feeding test was conducted, and the paper feeding result was 100%.

For comparison, a diazo copying material was obtained by repeating the same procedure using the same photosensitive layer forming solution as above, except that a precoat layer forming solution containing no oxyethylene phosphate derivative and a back surface forming solution containing no betaine were used. ,
A paper feeding test was conducted on this, and the paper feeding performance in this case was 52.5%.

As is clear from the results obtained in the above examples, by supporting a small amount of betaine or oxyethylene phosphate derivative on one or both sides of the support of the diazo copying material, the copying materials do not stick together. When the copying material prepared in this way is used in a copying machine equipped with an automatic paper feeder, it is possible to smoothly feed the paper one sheet at a time.

Claims (1)

[Scope of Claims] 1. A diazo copying material comprising a support, a precoat layer and a photosensitive layer formed on the support, wherein (1) betaine and (II) A diazo copying material characterized in that it supports at least one of oxyethylene phosphate derivatives. In the above formula, R is an alkyl group or an aralkyl group, R1 is an alkyl group or an aralkyl group, R2 is hydrogen, an alkyl group, an aralkyl group, or -(CH2CH20)n1
-R4 (R4 is hydrogen, an alkyl group or an aralkyl group, n1 is an integer of 1 to 7), R3 is an amino group, an alkylamino group or a carbamoyl group, and n is an integer of 1 to 7 .