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Introduction To Unsaturated Polyester Resin (UPR) Production Line | JCT Machinery

March 03, 2025
Main Equipments of UPR Production Line
  • 1. Reactor

  • For esterification reaction, control temperature and pressure.

  • 2. Condenser

  • To recover water generated during esterification and improve reaction efficiency.

  • 3. Vacuum System

  • To improve product purity and reduce bubble formation.

  • 4. Measuring Equipment

  • To accurately control the proportion of raw materials.

  • 5. Stirring Device

  • To ensure uniform mixing of materials and accelerate reaction speed.

  • 6. Cooling System

  • To cool to a temperature suitable for adding diluent.

  • 7. Storage Tank

  • To store finished products for convenient packaging and transportation.

  • 8. Filtration System

  • To filter impurities and improve resin quality.

  • 9. PLC

  • To achieve automatic control and improve production efficiency and stability.

  • Q
    Unsaturated Polyester Resin Production Process
    1. Raw Material Preparation
    The raw materials include polyols, unsaturated dibasic acids, saturated dibasic acids and intiators. The ingredients need to be measured to ensure accurate ratios.
    2. Esterification Reaction
    High-temperature esterification reaction is carried out in a reactor. The reaction temperature is usually controlled at 180-220℃ for several hours to produce unsaturated polyester prepolymers. During the reaction, the by-product water needs to be recovered through a condenser.
    3. Cooling and Dissolving
    After the reaction is completed, the temperature is gradually reduced, and diluents such as styrene are added to adjust the viscosity and reactivity of the resin.
    4. Degassing and Filtration
    The bubbles in the system are removed through a vacuum degassing system to improve the purity of the resin. Filter out impurities to improve the quality of the final product.
    5. Finished Product Storage and Packaging
    The produced resin enters the storage tank and is stored in barrels or cans according to market demand.
UPR production line            
Technical Features of UPR Production Line
1. High Efficiency and Energy Saving: Automatic control is adopted to improve reaction efficiency and reduce energy consumption.
2. Environmental Emission: Equipped with condensation recovery system to reduce exhaust gas emissions and meet environmental protection requirements.
3. Stable Quality: PLC automatic control improves product consistency and reduces human errors.
4. Safe and Reliable: Reactor is equipped with temperature and pressure monitoring systems to ensure the safety of the production process.
Application Fields of UPR
1. Fiberglass Reinforced Plastic (FRP): Composite materials such as ships, automobiles, storage tanks, pipelines, etc.
2. Coatings: Architectural decoration, industrial anti-corrosion coatings.
3. Adhesives: Artificial stone bonding, wood composite board bonding.
4. Electronic Potting Materials: Used for the protection of electrical and electronic equipment.

unsaturated polyester resin factory


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