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Introduction to plastic modification methods
Introduction to plastic modification methods
- Categories:Industry knowledge
- Author:
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- Time of issue:2020-02-10 13:32
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(Summary description)By adding one or more other substances to the plastic resin, it is a method to change its original performance, improve one or more aspects, and thus achieve the purpose of expanding its scope of application. Modified plastic materials are collectively referred to as "modified plastics".
Introduction to plastic modification methods
(Summary description)By adding one or more other substances to the plastic resin, it is a method to change its original performance, improve one or more aspects, and thus achieve the purpose of expanding its scope of application. Modified plastic materials are collectively referred to as "modified plastics".
- Categories:Industry knowledge
- Author:
- Origin:
- Time of issue:2020-02-10 13:32
- Views:
By adding one or more other substances to the plastic resin, it is a method to change its original performance, improve one or more aspects, and thus achieve the purpose of expanding its scope of application. Modified plastic materials are collectively referred to as "modified plastics".
There are roughly the following types of plastic modification methods:
1. Reinforcement: The purpose of increasing the rigidity and strength of the material is achieved by adding fibrous or flake fillers such as glass fiber, carbon fiber, and mica powder, such as glass fiber reinforced nylon used in power tools.
2. Toughening: by adding rubber, thermoplastic elastomer and other substances to the plastic to improve its toughness/impact strength, such as toughened polypropylene commonly used in automobiles, home appliances and industrial applications.
3. Blending: uniformly mix two or more incompletely compatible polymer materials into a macro-compatible and micro-phase-separated mixture to meet certain requirements in terms of physical and mechanical properties, optical properties, and processing properties. The required method.
4. Alloy: similar to blending, but with good compatibility between components, it is easy to form a homogeneous system, and certain properties that cannot be achieved by a single component, such as PC/ABS alloy, or PS modified PPO, can be obtained.
5. Filling: The purpose of improving physical and mechanical properties or reducing costs is achieved by adding fillers to the plastic.
6. Other modifications: such as the use of conductive fillers to reduce the electrical resistivity of plastics; the addition of antioxidants/light stabilizers to improve the weather resistance of the materials; the addition of pigments/dye to change the color of the material, and the addition of internal/external lubricants to make the material The processing performance of the semi-crystalline plastic is improved, the nucleating agent is used to change the crystalline characteristics of the semi-crystalline plastic to improve its mechanical and optical properties, and so on.
In addition to the above physical modification methods, there are also methods to modify plastics by chemical reactions to obtain specific properties, such as maleic anhydride grafted polyolefin, polyethylene crosslinking, and the use of peroxides in the textile industry. Degrade the resin to improve fluidity/fibre-forming properties, etc. The industry often uses a variety of modification methods together, such as adding rubber and other toughening agents in the plastic reinforcement modification process in order not to lose too much impact strength; or the physical mixing in the production of thermoplastic vulcanizates (TPV) And chemical cross-linking and so on.
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