As a manufacturer with more than 20 years of research and development, production and sales of large current male and female joint. Amass has more than 100 kinds of connected products, widely used in drones, transportation tools, energy storage equipment, electric vehicles and other industries.
All the products launched by Amass are self-developed and designed, after many tests in the market, excellent quality, stable performance, and the products have been tested by salt spray, plug and pull force, flame retardant and so on! In this, flame retardant is particularly important, in the face of the occurrence of spontaneous combustion and other conditions of electric vehicles, the new national standard clearly stipulates that the power connector must have flame retardant performance. As a professional lithium internal connector expert, Amass takes you to understand the flame retardant of plastic parts:
Flame Retardant Overview
Flame retardant refers to the fact that under specified test conditions, the sample is burned, and after the fire source is removed, the flame spread on the sample is only within a limited range and self-extinguishing characteristics, that is, it has the ability to prevent or delay the occurrence or spread of the flame.
In the terminal, flame retardancy is achieved by adding flame retardant materials. Flame retardant grade from high to low V0, V1, V2 and so on. Amass DC power connector plastic parts using PA66 plastic material, the material is better in line with UL94, V0 flame retardant.
Flame-retardant materials are protective materials that can prevent combustion and are not easy to burn themselves, and flame-retardant materials are mainly organic and inorganic, halogen and non-halogen. Organic is bromine series, nitrogen series and red phosphorus and compounds represented by some flame retardants, inorganic is mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardant systems.
In general, organic flame retardants have a good affinity, and bromine flame retardants occupy an absolute advantage in organic flame retardants.
The basic elements of combustion are combustibles, combustibles and ignition sources. It is generally believed that the combustion of plastics goes through three processes such as heat induction – thermal degradation – ignition.
Flame retardant mechanism
In general, the flame retardant mechanism is to add a certain proportion of flame retardants to the plastic, so that the oxygen index increases, thus producing flame retardant effect. In general, when plastics containing flame retardants burn, flame retardants act in many ways in different reaction areas. For different materials, the effect of flame retardants may also be different.
The action mechanism of flame retardants is complicated. But the aim is always to cut off the combustion cycle by physical and chemical means. The effect of flame retardants on combustion reaction is manifested in the following aspects:
1, located in the condensed phase of the flame retardant thermal decomposition, so that the relative temperature in the condensed phase to slow down the rise of plastic thermal decomposition temperature, the use of flame retardant thermal decomposition generated by the gasification of non-combustible gas to reduce the temperature.
2, the flame retardant is decomposed by heat, releasing the flame retardant that captures the -OH (hydroxyl) radical in the combustion reaction, so that the combustion process according to the free radical chain reaction terminates the chain reaction.
3, under the action of heat, the flame retardant appears endothermic phase transition, preventing the increase of the temperature in the condensed phase, so that the combustion reaction slows down until it stops.
4, catalyze the thermal decomposition of condensed phase, produce solid phase products (coking layer) or foam layer, hinder the heat transfer effect. This keeps the condensed phase temperature low, resulting in a reduced rate of formation as a gas phase reaction feedstock (the breakdown product of combustible gases).
In short, the effect of flame retardants can comprehensively slow down the speed of the combustion reaction, or make the initiation of the reaction difficult, so as to achieve the purpose of inhibiting and reducing the fire hazard.
Flame retardant significance
The normal operation of electricity will inevitably generate heat, and the DC butt plug can be tolerated within the specified temperature range, but exceeding the temperature upper limit may cause a fire accident. The existence of flame-retardant materials in the high-current butt plug can avoid the occurrence of fire to a certain extent, reduce the danger index, maintain the normal operation of the system, and protect the safety of life and property.
Post time: Dec-30-2023