Now when making PE tarpaulins, various additives are of […]
Now when making PE tarpaulins, various additives are often added to enhance its performance. Antistatic agents are one of them. There are three commonly used antistatic agents, which are:
1. Cationic antistatic agent: Usually it is some long-chain alkyl quaternary ammonium, phosphorus or phosphonium salt, and chloride is used as counter ion. They work well in polar matrices, such as rigid polyvinyl chloride and styrenic polymers, but have a negative effect on their thermal stability. This type of antistatic agent is generally not used in food contact items; and the antistatic effect is only 1/5 to 1/10 of the internal antistatic agent such as ethoxylated amines.
2. Anionic antistatic agent: It is usually alkali metal salt of alkyl sulfonic acid, phosphoric acid or dithiocarbamic acid. It is also mainly used in polyvinyl chloride and styrene resins; their application in polyolefin resins The effect is similar to a cationic antistatic agent. Among the anionic antistatic agents, sodium alkylsulfonate has been widely used in styrene resins, polyvinyl chloride, polyethylene terephthalate, and polycarbonate.
3. Non-ionic antistatic agents: such as ethoxylated aliphatic alkylamines represent a larger class of antistatic agents. They are widely used in polyethylene, polypropylene, ABS and other styrenic polymers. There are several ethoxylated alkylamines produced and sold, the difference being the length of the alkyl chain and the degree of unsaturation. Ethoxylated alkylamines are very effective antistatic agents, even at low relative humidity, and are effective over the long term.