Flame Retardant ABS Material
is the world's largest general-purpose engineering plastic. It is a light yellow granular or beaded resin. It is non-toxic, odorless, and has low water absorption. It has good comprehensive physical and mechanical properties, such as excellent electrical properties, abrasion resistance, and stable size. Properties, chemical resistance, surface gloss, etc., and easy to process. The disadvantages are weather resistance, poor heat resistance, and flammability.
There are three main ways to reduce the flammability of ABS resin:
1. Blend with flame retardant polymer and ABS, such as CPE, PVC;
2. Chemical modification of existing ABS, such as adding tribromostyrene as the fourth monomer to prepare four-component ABS;
3. Add flame retardants to ABS through common methods, including inorganic flame retardants (such as MoO3) and organic flame retardants. The flame retardant type has a highly effective flame retardant effect, but other properties may not be good. Chemically modified ABS requires a specific production process, the process is more complicated, the third method strikes a balance between cost and performance, and is more flexible in designing multifunctional materials.
As an, share with you the knowledge of flame retardants. A flame retardant is an additive added to plastics to increase the difficulty of burning plastics.
1. Purpose of adding flame retardant
Resin is a high molecular organic compound, so it is flammable. With the increase of plastic products in our living environment, fires caused by plastic are common and have become one of the key concerns of the club. The combustion of plastic is a very complicated and intense oxidation reaction. The combustion process is continuously heated by external heat sources. The plastic first undergoes a free-radical chain degradation reaction with oxygen in the air to produce volatile combustibles. When a certain temperature and temperature are reached, It will burn when the concentration, and the heat released by the combustion will aggravate the plastic degradation of Taurus, generating more flammable gases to make the combustion more intense. The addition of flame retardants makes this combustion process difficult or slow.
2. Mechanism of flame retardant
(1) Separate oxygen from combustible materials. Oxygen is a major factor in combustion. Without oxygen or lack of oxygen, it is difficult to burn.
(2) The active free radicals generated during the combustion of plastics are trapped to generate water or hydrogen, which interrupts the chain oxidation reaction, which is the slowing down of the combustion and thus stops it.
(3) The flame retardant can absorb a large amount of heat during endothermic decomposition and dehydration, thereby suppressing the temperature rise of the burning part and its vicinity, making it difficult to continue the combustion.
Often the effect of one flame retardant is not necessarily ideal. In practice, several flame retardants can be used together, and the effect is much better.
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