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1. Filling modification (mineral filling)
　　By adding inorganic mineral (organic) powder to ordinary plastics, the rigidity, hardness, heat resistance and other properties of plastic materials are improved. There are many types of fillers and their characteristics are extremely complex.
　　The role of plastic fillers: improve plastic processing performance, improve physical and chemical properties, increase volume, and reduce costs.
　　 Requirements for plastic additives:
　　(1) The chemical property is inactive, inert, and does not cause adverse reactions with resin and other additives;
　　(2) Does not affect the water resistance, chemical resistance, weather resistance, heat resistance, etc. of the plastic;
　　(3) Does not reduce the physical properties of the plastic;
　　(4) can be filled in large quantities;
　　(5) The relative density is small, and it has little effect on the density of the product;
　　(6) The price is relatively low.
2. Enhanced modification (glass fiber/carbon fiber)
　　Reinforcement measures: by adding fibrous materials such as glass fiber and carbon fiber.
　　Enhancement effect: It can significantly improve the rigidity, strength, hardness, and heat resistance of the material,
　　Adverse effects of modification: But many materials will cause poor surface and lower elongation at break.
　　Enhancement principle:
　　(1) Reinforced materials have higher strength and modulus;
　　(2) Resin has many inherent excellent physical and chemical (corrosion resistance, insulation, radiation resistance, instantaneous high temperature ablation resistance, etc.) and processing properties;
　　(3) After the resin is compounded with the reinforced material, the reinforced material can improve the mechanical or other properties of the resin, and the resin can play the role of adhesion and transfer load to the reinforced material, so that the reinforced plastic has excellent performance.
3. Toughening modification
　　 There are many materials that are not tough enough and too brittle. You can add materials with better toughness or ultrafine inorganic materials to increase the toughness and low-temperature performance of the materials.
　　 Toughening agent: In order to reduce the brittleness of the plastic after hardening, and to improve its impact strength and elongation, it is an additive added to the resin.
　　Commonly used toughening agent-mostly maleic anhydride grafting compatibilizer:
　　 ethylene-vinyl acetate copolymer (EVA)
　　Polyolefin elastomer (POE)
　　Chlorinated Polyethylene (CPE)
　　Acrylonitrile-butadiene-styrene copolymer (ABS)
　　 styrene-butadiene thermoplastic elastomer (SBS)
　　 EPDM (EPDM)
　　4, flame retardant modification (halogen-free flame retardant)
　　In many industries such as electronic appliances and automobiles, materials are required to have flame retardancy, but many plastic materials have low flame retardancy. Increasing flame retardancy can be achieved by adding flame retardants.
Flame retardants: also known as flame retardants, fire retardants or fire retardants, functional additives that impart flame retardancy to flammable polymers; most of them are VA (phosphorus), VIIA (bromine, chlorine) and Compounds of ⅢA (antimony, aluminum) elements.
　　Molybdenum compounds, tin compounds and iron compounds with smoke-suppressing effects also belong to the category of flame retardants. They are mainly suitable for plastics with flame retardant requirements to delay or prevent the burning of plastics, especially polymer plastics. Make it longer to ignite, ignite self-extinguishing, and difficult to ignite.
　　 Plastic flame retardant grade: from HB, V-2, V-1, V-0, 5VB to 5VA step by step.
　　 6. Special materials for automobiles (automobile exteriors, interiors, auto parts)
7. Low odor plastics (low odor, low VOC)
8. Modified alloy
Plastic alloy is the use of physical blending or chemical grafting and copolymerization methods to prepare two or more materials into a high-performance, functional, and specialized new material to improve the performance of one material or both. The purpose of material properties. It can improve or enhance the performance of existing plastics and reduce costs.
　　General-purpose plastic alloys: such as PVC, PE, PP, PS alloys are widely used, and the production technology has been generally mastered.
Engineering plastic alloy: refers to the blend of engineering plastics (resin), mainly including the blending system with PC, PBT, PA, POM (polyoxymethylene), PPO, PTFE (polytetrafluoroethylene) and other engineering plastics as the main body, And ABS resin modified materials.