There are various types of additives for PVC (polyvinyl chloride), which can be divided into the following categories based on their functions, with common specific ingredients and uses attached:
1. Heat stabilizer
Function: To prevent the release of HCl due to thermal decomposition during PVC processing or use.
Common types:
Lead salts (such as trisodium lead sulfate): Low cost but high toxicity, gradually phased out.
Calcium zinc stabilizer: environmentally friendly, used for food packaging and medical devices.
Organic tin compounds (such as dibutyltin) have good transparency and are suitable for medical products.
Rare earth stabilizer: a new environmentally friendly alternative.
2. Plasticizers
Function: Increase flexibility and lower glass transition temperature.
Common types:
Phthalates (such as DOP, DBP): Universal, partially limited in toxicity (such as DEHP).
Environmentally friendly alternatives: Citrate esters (ATBC), epoxidized soybean oil (ESO), polyester plasticizers.
3. Lubricants
Function: Reduce machining friction and improve fluidity.
Category:
Internal lubricants (such as stearic acid): reduce intermolecular friction of PVC.
External lubricants (such as paraffin): reduce friction between PVC and equipment.
4. Impact modifier
Function: Improve impact resistance.
Common types:
CPE (Chlorinated Polyethylene): High cost-effectiveness.
MBS (methyl methacrylate butadiene styrene copolymer): suitable for transparent products.
ACR (acrylic ester): Excellent comprehensive performance.
5. Processing aids
Function: Improve melt strength and flowability.
Common types: ACR (such as Paraloid series), EVA (ethylene vinyl acetate copolymer).
6. Flame retardants
Function: Inhibit combustion, used in building materials, wires and cables.
Type:
Inorganic materials: aluminum hydroxide, magnesium hydroxide (environmentally friendly but with a large amount of additives).
Organic compounds: Bromine compounds (such as decabromodiphenyl ether, partially restricted), phosphorus compounds (such as phosphate esters).
7. Light stabilizer
Function: Anti UV aging, used for outdoor products.
Common types:
UV absorbers (such as benzotriazoles).
Hindered amine light stabilizer (HALS).
8. Fillers
Function: Reduce costs and regulate performance.
Examples: Calcium carbonate (light calcium/heavy calcium), talc powder, and wollastonite.
9. Colorants
Type:
Organic pigments: brightly colored.
Inorganic pigments: good weather resistance.
Bontecn Group China specializes in producing PVC additives，At present, the company has 5 senior R & D personnel, more than 20 intermediate R & D personnel, and more than 20 collaborative teams.Now the company and foreign well-known enterprises jointly develop a new product, the product can solve the traditional plastic formula ingredients trouble and high cost problems, and has achieved significant results. With advanced process technology and perfect detection means, we continue to explore, concentrate on research and development, and cooperate with scientific research institutes all year round to continuously develop new products and new processes.
Post time: Oct-13-2025
