Plastic Additives

The main performance
The main requirements of the plastic additives are:
① Efficient: applications in plastics processing and can effectively play its proper function. Selection should be based on the additive mixing with the comprehensive

performance requirements.
② Compatibility: synthetic resin with better compatibility.
③ Persistence: in the plastic processing and application process is not volatile, non-bleeding and non-migratory and non-leaching.
④ Chemical stability: in the plastic processing and application process does not decompose with the synthetic resin and other components of the chemical reaction.
⑤ Non-toxic: no toxic effects on the human body.
⑥ low prices. Add a way to add an additive depends on: the physical form of synthetic resin and melt characteristics; additives physical form and concentration;

additive compounds, the dispersion and solubility; compounds, the ultimate physical condition. Add o clock

High-speed mixing, mixing and extrusion processes. The effect additives may be added, in addition to depending on their mechanism of action, but also depends on the

correct order of addition.
Type
Plastic additives according to their specific functions can be divided into seven categories:
① to improve the processing performance additives such as heat stabilizers, lubricants and the like.
② improve machining performance additives, such as plasticizers, toughening agents, etc.
③ additives improve the surface properties, such as an antistatic agent, a coupling agent.
④ improve optical performance additives such as coloring agents. ⑤ improve the aging properties of additives, such as antioxidants, light stabilizers.
⑥ reduce the cost of plastic additive , such as extenders, fillers and the like.
⑦ impart other specific effects of additives such as blowing agents, flame retardants, fungicides and so on.
Additive is dispersed in the molecular structure of the plastic, the plastic will not seriously affect the molecular structure, and can improve the properties or

reduce the cost of chemicals. Additive to be added, can promote improved plastic substrate processing, physical, chemical and other functions and increasing

Substrate physical and chemical properties.
According to the pvc additive to improve functional differences, there are many different titles additives.
Specifically, from the increase of the processing characteristics of the substrate, additives include: ① Liquidity: sl ip agent; ② thermal stability; ③ heat

stabilizers, antioxidants; ④ dispersion: processing aids, dispersants; ⑤ compatibility : Compatible, coupling agents; ⑥ melt strength:

Bridging agent, thickening agent.
Increasing the substrate from physical and chemical properties of the additive include: ① rigidity, strength: fillers, nucleating agents; ② shock resistance: the

impact modifier; ③ Heat resistance: fillers, nucleating agents; ④ flame Xing: flame retardants; ⑤ Weather resistance: UV stabilizer stability

Agent; ⑥ conductivity: Antistatic conductive coating filler; ⑦ Color: pigment; ⑧ Flex: plasticizers processing oil; ⑨ density: foaming agent; ⑩ Transparency:

nucleating agents, health of: antibacterial agent. Additives are mainly the following categories: 1, antioxidant

Agent (Antioxidant) unsaturated double bonds in the plastic by an oxygen atom, the invasion of heat and light, free radicals cause fracture, thereby causing a chain

reaction, the molecular chains or the formation of the crosslink, resulting in reduction in strength of plastic products or brittle. Antioxidants function

Is that the delay can be due to oxidation and decomposition of the plastic, extending the life of plastic products.
Used in the plastics industry antioxidants can be classified according to function: (1) the oxidation chain reaction inhibitors: eg alkylphenols (Alkyl phenol),

butylated toluene (Butylatedhydroxytoluene referred BHT), aromatic amines (Aromatic amines),

Phenyl-B-resistant amine (Phenyl-B-Naphthylamine), alkyl of Kun (Alkyl Quinone), an alkenyl group of bisphenol (Alkylene bisphenol), alkylphenol sulfide (Alkyl

phenolthioether), salicylate, phenyl means (Phenyl salicylate )

And so on. (2) peroxide decomposers: alcohols such as Liu acute thioether sulfur propionate (Thio propio nate ester), an organic phosphorous compound.