dry film application on sales introduces the storage and transportation knowledge of dry film
Dry film is relative to wet film. Dry film is a kind of polymer material, which can produce a polymerization reaction after being irradiated by ultraviolet rays, forming a stable substance attached to the board surface, so as to prevent electroplating and etching. Features. So how much do you know about its storage and transportation knowledge? The dry film application on sales editor will take you to a brief look at it.
During storage, the dry film may become brittle due to the volatilization of the solvent, or thermal polymerization due to the influence of ambient temperature, or uneven thickness due to local flow of the resist (so-called cold flow), all of which are serious. affect the use of dry film. Therefore, it is very important to store the dry film in a good environment. The technical requirements state that dry film should be stored in a cool and clean room, protected from storage with chemicals and radioactive substances. Storage conditions are: yellow light area, the temperature is lower than 27 ℃ (5~21 ℃ is better), and the relative humidity is about 50~80%. The shelf life needs to be used up within six months from the date of manufacture. If the storage period exceeds the storage period and is determined to be qualified after the test and confirmation according to the technical requirements, it must be used in strict accordance with the test conditions. During storage and transportation, avoid moisture, heat, mechanical damage and direct sunlight. The dry film should not be placed upright, otherwise it is easy to cause glue flow.
The above is the description of dry film application on sales: a brief introduction to the knowledge of storage and transportation of dry film.