Application of non-diazonium naphthoquinone type positive PS plate (2)

5. High resistance to printing force

A high-molecular-weight linear phenol resin is used to introduce a protective group as a solvent, and a high-molecular-weight linear phenol resin is used as a film-forming resin. The obtained new-type PS plate generally has an anti-printing force of more than 100,000, and has a higher resistance to printing.

6. The photosensitive liquid and PS plate have good storage stability

The storage stability of the new system photosensitive liquid is generally more than six months or more, and the phenomenon that the previous diazonaphthoquinone series photosensitive solution precipitates out of the blocking solvent rarely occurs. If the coated PS plate is stored in a cool and dark place, the sensitivity will rarely change within half a year, and it can still be used for normal plate-making for one year. The stability of the latent image after exposure is also good. We have developed after 13 months of exposure and still get images.

7. Good coating applicability

With the general PS plate production line can apply a more satisfactory version of the original, especially with the extrusion coating equipment, coupled with the pre-coating primer coating, the surface of the coated plate is smooth, with few pinholes.

8. Features with exposure subtractive color

The new PS version of the photosensitive composition is supplemented with an acid-producing source. On the one hand, it acts as an acid-producing and deprotecting group, and on the other, it functions as a color-reducing acid-producing agent. After the exposure, the image has a latent image.

9. The B/P value of the photosensitive composition can be large

The B/P value (weight ratio of the film-forming resin to the sensitizer) of the general diazo naphthoquinone positive PS plate is generally between 2 and 3, and we developed a new type of non-naphthoquinone naphthalene-type positive PS plate. The B/P value is generally between 5 and 6. A large B/P value means that the amount of photoactive compound used can be reduced, the cost of the photosensitive liquid can be effectively reduced, and the three-waste pollution in the process of the photosensitive liquid preparation can also be reduced.

10. Little pollution to the environment

Compared with naphthoquinone diazide type PS plates, in the synthesis process of various imaging substances of the photosensitive composition of the new PS plate, the three wastes and the toxicity thereof are small, and the toxicity of the resin, the solvent, and the like, which enters the developing solution after the development, is also small. Is a prominent advantage of the new PS version.

Fourth, the new PS version of the economic analysis

Any kind of new product developed and researched should be popularized in the market, and be invincible in the competition. In front of us, we analyzed the performance of the new positive PS version and its unique advantages. This only confirmed the aesthetic aspect of the PS version. We must also analyze the economic benefits to confirm its low-cost side. Here we use a new type of PS version for economic analysis.

The film-forming resin used in this plate is similar to the film-forming resin used in the naphthoquinonediazide positive PS plate, and the selling price is also very similar. The graft parent of the PAC compound used is also a linear phenol resin; the protective group reagent unit used The price of the weight is the same as 2,1,5-diazonaphthoquinonesulfonyl chloride, but the amount of the protecting group is only about half that of diazonaphthoquinonesulfonyl chloride. Therefore, the novel PAC compound is more sensitive than the diazonaphthoquinone PAC. The unit price is much cheaper. In particular, it should be emphasized that when the novel PAC compound is used, the B/P value can be designed to be between 5 and 6, whereas when using diazonaphthoquinone PAC, the B/P value can only be between 2 and 3. When preparing photosensitive compositions, the new PACs use only about half of the traditional PAC dosage. We know that the cost of the photolithographic solution for the positive-acting PS version is mainly determined by the PAC compound. The cost advantage of the new positive-acting PS version of the photosensitive composition is self-evident. The amount of the photoacid generator used in the new photosensitive composition is also similar to the amount of the conventional colorless PS version. Even if it is higher, the percentage of the total solid content is not high enough to change the photosensitive content. The overall price of the composition. As for other trace additives and the solvents used to formulate the photosensitive solution, they are roughly the same as the conventional positive-tone PS plate. The base plate of the new PS version can be originally used for the base plate used in the conventional traditional PS plate, and the coating can also be applied on a conventional PS plate production line. There is no factor in raising the cost of the production process. As the new PAC has almost no waste and toxicity problems in the synthesis process, the cost for waste treatment can be saved, so the production cost of the new plate is lower than the production cost of the traditional PS plate.

Although the PS version of the non-diazonium naphthoate positive is a new product, it will add a certain amount of research and development costs, but the initial price in the market can still maintain the same level with the traditional PS version. With the increasing sales volume and the continuation of sales time, the price advantage of the new PS version will become increasingly apparent.

The CTcP system that can directly plate the ordinary PS plate has been applied abroad.

I believe in the near future will be applied in the country

V. Conclusion

1. The sensitivity, contrast, resistance to printing force, coating suitability, and B/P values ​​of the new non-naphthoquinone-naphthalene-type positive PS plates are superior to those of traditional positive-tone PS plates.

2. The raw material cost and production cost of the new non-diazonium naphthoquinone positive PS version are lower than the traditional PS version.

3. The new PS version can meet the high sensitivity requirements of newspaper printing and general printing, especially for CTcP plate making system.

Source: Digital Printing