Cleaner production process of fleksibilna ploča

1. Direct metallization (DMS): ethylenediamine tetraacetic acid (EDTA) is contained in the chemical copper precipitation solution as a chelating agent, and most printed circuit board manufacturers do not have the technology to recover ethylenediamine tetraacetic acid, so the use of chemical copper precipitation is limited. At present, the more advanced is the direct metallization method (DMS) without chemical copper deposition. Instead, fine carbon powder is dipped and coated on the hole wall to form a conductive layer. After micro etching, the carbon base on the copper layer is removed, and only the conductive carbon film layer is retained on the non conductor (insulating epoxy resin substrate) inside the hole wall, and then directly electroplated. In simultaneous interpreting, the new fully enclosed equipment was used in electroplating. Compared with the traditional electroplating bath, the emission of waste gas to the outside was reduced by more than 95%, the discharge of sewage was reduced by about 1 / 3, and the concentration of pollutants in the waste liquid was low. At the same time, due to the good sound insulation effect of the equipment and the installation of silencing device of forced draft fan, the noise pollution is greatly reduced.

2. Pure tin electroplating method: using pure tin electroplating instead of tin lead electroplating can eliminate the pollution of heavy metal lead. According to the thickness of lead tin plating layer of circuit board 10 m, the amount of lead in 1t waste liquid is 18 ~ 20 kg. According to the amount of tin stripping waste liquid 52.1t/a, the lead emission can be reduced by 937.8 ~ 104.0kg/a.

3. Dodajte valjak za vodu i nož za zrak: valjak za upijanje vode i nož za zrak postavljeni su između odjeljka za bakrovanje amonijaka i dijela za ispiranje vode, tako da se otopina za jetkanje može u potpunosti iskoristiti u spremniku za jetkanje, a količina bakra amonijaka koju iznese ispuštena kanalizacija može se smanjiti za 80% u usporedbi s tradicionalnom metodom, smanjujući poteškoće i troškove pročišćavanja otpadnih voda. U odjeljku stroja za razvijanje i odjeljku za ispiranje vode postavljeni su valjci za upijanje vode i zračni noževi, tako da se razvijač može u potpunosti iskoristiti u spremniku za razvijanje, a količina kalijevog karbonata koju ispušta ispuštena kanalizacija uvelike se smanjuje. Relevantna mjesta ispuha opremljena su izlazima ispušnih plinova koji su izravno povezani s cjevovodom ispušnih plinova tijekom ispuha, a ispušni plinovi ulaze u postrojenja za pročišćavanje kako bi se izbjeglo curenje. Istodobno, voda iz zadnjeg ispiranja razvijača ponovno se koristi u odjeljku za jetkanje, čime se štedi puno svježe vode.

4. Potpuno zatvorena oprema: odjeljak za oksidaciju prihvaća potpuno zatvorenu opremu, a preljev otpadnih plinova je više od 95% manji od onog u tradicionalnom spremniku za pocrnjenje. Prednji dio sustava opremljen je pećnicom za sušenje. U usporedbi s linijom za crnjenje odvojenom od pećnice, organski otpadni plin može se bolje sakupljati i obrađivati ​​te smanjiti njegovo prelijevanje. Oprema ima dobar učinak zvučne izolacije, a uređaj za prigušivanje ventilatora s prisilnim propuhom može uvelike smanjiti zagađenje bukom.

5. Changing the rack: changing the rack and covering the rack with tin can prolong the frequency of changing the tank of nitric acid solution of the rack from 2D / time to 7d / time, and reduce the sewage discharge.

6. Korištenje dušične kiseline umjesto fluoroborne kiseline: korištenje dušične kiseline umjesto fluoroborne kiseline za uklanjanje kositra može ukloniti onečišćenje fluorom.

7. Using CAD and photo plate making: using CAD and photo plate making technology can improve the quality of photographic plate and reduce the waste and pollution of photographic plate.

8. Using laser direct imaging technology: using laser direct imaging technology can save the photographic plate making process, so as to avoid the waste and pollution of photographic negatives.