Certain kinds of electronic devices called “Surface Mount Devices” or SMD’s are mounted on a circuit card by high temperature soldering. The body of the SMD is made from plastic that absorbs moisture from the air. When the case is heated during soldering, the moisture inside turns to steam and may break the device as the steam escapes. Keeping SMD’s dry before soldering means that the devices will not be damaged.
To protect your electronic devices protected from moisture, use moisture barrier bags with desiccant.
HOW TO USE DESICCANTS WITH MOISTURE BARRIER BAGS?
Desiccant is a drying agent that is used to absorb moisture from the air inside moisture barrier bags. Desiccant absorbs moisture vapor (humidity) from the air left inside that barrier bag after it has been sealed. Any moisture that penetrates the bag will also be absorbed. Desiccant remains dry to the touch even when it is fully saturated with moisture vapor.
HOW IS DESICCANT PURCHASED?
Desiccant is sold by the “Unit” or fractional Unit. One unit of desiccant will absorb a specific amount of moisture. A unit weighs about 28 grams or 1 ounce. The pouches of desiccant are placed into metal pails to keep the desiccant dry during shipping and storage.
HOW IS DESICCANT PACKAGED?
Desiccant is packaged in small sealed pouches made from a white plastic called “Tyvek”, or brown “Kraft” paper. Tyvek pouches are very clean and sulfur free. Kraft pouches are economical.
Inelco Hunter Ltd offer a range of moisture barrier bags, desiccant and humidity indicator cards to protect your devices
For further details on static control products, visit www.inelcohunter.co.uk or chat to one of our sales engineers on 0844 875 1585