Why use halogen-free PCB?

Posted by freemexy on January 4th, 2021

What is the Importance of a Halogen-free Printed Circuit Board?To get more news about Halogen Free PCB, you can visit pcbmake official website.

Environmental and Health Issues
The main reason for using halogen-free PCB is environmental protection.Flame retardant is a heavy topic.

Halogenated polymers or flame retardant mixtures composed of halogenated polymers and halogenated flame retardants have excellent flame retardancy and have been widely used as flame retardants.

However, when fire occurs, this kind of halogenated flame retardant material will produce a large amount of smoke and toxic corrosive hydrogen halide gas, causing secondary hazards. The new flame retardant system has low smoke and no toxic and corrosive gases. Halogen-free flame retardant additives are mainly phosphorus compounds and metal hydroxides. These two kinds of compounds, which do not volatilize and produce corrosive gases during combustion, are called pollution-free flame retardants. In addition, there are some new halogen-free flame retardants, such as silicon flame retardants and nitrogen flame retardants.

Halogen-free flame retardant is to add appropriate halogen-free flame retardant in materials to achieve this goal.

During the early days of PCB development, many toxic compounds were used as either a cost-saving aspect of manufacturing or because of the specific, helpful nature of the element. As humanity develops an increased understanding of the threats that past materials present to life in today`s world, manufacturers are changing methods and finding new materials that don`t pose a threat to individuals working with such creations.

Common compounds that are used in PCB developments belong to the family of Halogen elements. Although the composition themselves provide certain benefits to the development of electronics, they are harmful to human life in one way or another.While there is still debate on the toxicity of halogens within PCB development, there are two primary elements that constitute the general consensus of a halogen-free circuit board. These two are chlorine and bromine. Each provides a specific benefit to the overall safety and functionality of electronics but pose a threat to the continuity of life for humans and nature.
Chlorine is used as an antibacterial agent in bleaches and pools and as solvents for cleaning computer chips and circuit boards in electronic industry whereas Bromine is used as a sterilizing agent and as flame retardant in electronics components. Due to these reasons, there use have been kept persistent for so long. However, their harmful effects greatly outweighs the benefits.

On exposure to high temperature, they release toxic gases which leads to coughing, nausea, blurred vision, skin irritation, trouble breathing and burning in the eyes, nose and throat. Prolonged exposure can lead to unconsciousness. They even form deadly chemicals on combination with hydrocarbons. Hence Halogen free PCB`s were introduced to curb the impending danger.

The importance of halogen-free components can be viewed as an effect of the aftermath from disposal of various electronics. While merely handling a PCB will more than likely not affect an individual, it is the incineration and destruction of components that pose the more serious threat. Dioxin is a compound that forms when chlorine-based components are brunt with the addition of hydrocarbons. According to the United States Environmental Protection Agency, dioxin is one of the most toxic chemicals currently known to exist.

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