Engineering plastics

Overview

Engineering plastics generally refer to plastics that can withstand certain external forces, have good mechanical properties and high and low temperature resistance, and have good dimensional stability, and can be used as engineering structures.

Engineering plastics modification refers to the plastic processing process of plastic products based on engineering plastics, which has improved flame retardancy, strength, impact resistance, toughness and other properties through filling, blending, reinforcement and other methods.

Main operation scope:

Engineering plastics modification is a technology widely used in industry and science and technology to meet various application requirements by changing the basic properties of plastics.

  • Reinforcement: by adding glass fiber, carbon fiber, mica powder and other fibrous or flaky fillers to increase the rigidity and strength of the material, such as glass fiber reinforced nylon used in power tools.
  • Toughening: by adding rubber, thermoplastic elastomers and other substances to the plastic to improve its toughness/impact strength, such as automotive, home appliances and industrial use of common toughened polypropylene.
  • Blending: The method of uniformly mixing two or more incompletely compatible polymeric materials into a macroscopically compatible, microscopically separated mixture to meet certain requirements for physical mechanical properties, optical properties, processing properties, etc.
  • Alloy: similar to blending, but good compatibility between components, easy to form a homogeneous system, and can obtain some properties that cannot be achieved by a single component, such as PC/ABS alloy, or PS modified PPO.
  • Filling: The purpose of improving physical and mechanical properties or reducing costs is achieved by adding fillers to plastics.
  • Other modifications: such as the use of conductive fillers to reduce the resistivity of plastics; add antioxidants/light stabilizers to improve the weatherability of materials; add pigments/dyes to change the color of materials, add internal/external lubricants to improve the processability of materials, use nucleating agents to change the crystallization characteristics of semi-crystalline plastics to improve their mechanical and optical properties, and so on.

Process Solution:

The raw materials are added into the twin-screw according to the precise proportion through the weightlessness electronic measuring scale. After melting, mixing, homogenization and reaction are completed in the twin-screw, the finished pellets are cooled, extruded and pelletized by a single screw. The finished pellets are then packaged after water cooling, dehydration, drying and storage.