1. Antioxidant

Unsaturated double bonds in plastics are attacked by oxygen atoms, heat and light, causing them to break and generate free radicals, thereby causing chain reactions, breaking molecular chains or forming chain cross-links, resulting in reduced strength or brittleness of plastic finished products. The function of antioxidants is to delay the decomposition of plastics due to oxidation and prolong the life of plastic products.

2. Antistatic agent

The main function of the antistatic agent is to impart electrical conductivity to the plastic so that it avoids the accumulation of static electricity caused by friction. Commonly used antistatic agents are quaternary ammonium salt, ethoxylated amines, fatty acid esters and sulfonated wax.

3.Blowingagent

Most of these foaming agents are organic azo compounds, such as azodicarbonamide and azobisisobutyro-nitrile (AIBN for short). The foamed plastics mainly include: ABS, PS, PVC, PU, EVA, PE, PP, etc.

4. Flame retardant

When the flame retardant-added plastic is exposed to the flame, it can suppress the spread of the flame by itself, preventing the formation of smoke, and the combustion will stop when the flame is removed.

5. Lubricant

Lubricants can be divided into internal lubricants and external lubricants. The main function of internal lubricants is to improve the internal fluidity of the resin and reduce the internal friction between the resin molecular chains, such as fatty acid lipids (monoglycerol stearate); External lubricants reduce resin adhesion to processing machinery and improve product surface smoothness and ease of mold release, such as HoechstWax.

6. Impact modifier

Impact modifiers are usually added with special resins by compounding to improve the impact resistance of plastics. Impact modifiers often affect the heat resistance, fluidity or processability of plastics and must be selected carefully.

7. Plasticizer

Most synthetic resins have plasticity, but the size of plasticity is different. In order to make the resin easy to plasticize and give the product softness, some low-molecular substances are generally added to the resin. These low-molecular substances are called plasticizers. Plasticizers are liquid or low-melting substances, and should have good miscibility with resins. Commonly used plasticizers are phthalates, aliphatic dibasic acid esters, phosphate esters, chlorinated paraffins, etc.

8. Coloring agent

It is a colorant-containing additive added to the material in order to beautify and decorate the plastic, which is called a colorant.

9. Filling material

It is added to the batch of plastics to reduce costs, and sometimes can also improve the physical properties of plastics, such as hardness, stiffness and impact strength. Relatively inert substances are called fillers. The most commonly used fillers are clay, silicate, talc, carbonate, etc.