A Brief Introduction To The Production Process of Modified Plastics

The so-called "plastic modification" refers to a method of adding one or more other substances to the plastic resin to change its original properties, improve one or more aspects of its properties, and thus expand its scope of application. The modified plastic materials are collectively referred to as "modified plastics". The production process of modified plastics is as follows:

There are roughly the following types of plastic modification methods:

1. Reinforcement: The rigidity and strength of the material can be increased by adding fibrous or flaky fillers such as glass fiber, carbon fiber, mica powder, etc., such as glass fiber reinforced nylon used in power tools.

2. Toughening: The purpose of improving the toughness/impact strength of plastics is achieved by adding other substances such as rubber and thermoplastic elastomers to plastics, such as toughened polypropylene commonly used in automobiles, home appliances and industrial applications.

3. Compounding: A method of uniformly mixing two or more incompatible polymer materials into a macro-compatible, micro-phase-separated mixture to meet certain requirements for physical and mechanical properties, optical properties, processing properties, etc.

4. Alloy: Similar to compounding, but the components have good compatibility, are easy to form a homogeneous system, and can obtain certain properties that cannot be achieved by a single component, such as PC/ABS alloy, or PS modified PPO.

5. Filling: Adding fillers to plastics to improve physical and mechanical properties or reduce costs.

6. Other modifications: such as using conductive fillers to reduce the resistivity of plastics; adding antioxidants/light stabilizers to improve the weather resistance of materials; adding pigments/dyes to change the color of materials; adding internal/external lubricants to improve the processing performance of materials; using nucleating agents to change the crystallization characteristics of semi-crystalline plastics to improve their mechanical and optical properties, etc.

In addition to the above-mentioned physical modification methods, there are also methods of modifying plastics by chemical reactions to obtain specific properties, such as maleic anhydride grafting polyolefins, cross-linking of polyethylene, and the use of peroxides in the textile industry to degrade resins to improve fluidity/fiber-forming properties, etc.

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