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1. What are PPC plastics, and how can they be identified by appearance? Reply: PPC belongs to the PP category; its full name is chlorinated polypropylene, and it is used in the manufacture of daily necessities, electrical appliances, etc. 2. What is the model of the raw material used to produce HDPE gas pipes and water supply pipes? Reply: The materials used for producing HDPE gas pipes and water supply pipes are PE80 and PE100. What material is PPN? Reply: PPN is a type of polypropylene. 4. What is the Chinese name for the plastic PPU? Reply: PPU is thermoplastic polyurethane. 5. How can PVC plastic be identified? Can PVC be recycled and granulated? By what method? Reply: 1. The Chinese name for PVC is polyvinyl chloride. Identification by combustion method; softening or melting temperature range: 75~90°C ； Combustion behavior: difficult to soften ； Flame combustion state: yellow on top, green below, with smoke ； Condition after removing from heat: The fire has gone out ； Odor: pungent acidic smell. Identification by solvent treatment, solvents: **furan**, methanol, dimethylformamide ； Non-solvents: methanol, propanone, heptane. 2. It can be regenerated and granulated. 3. The recycling process of PVC mainly includes the following 6 steps: 1) Pretreatment of PVC waste ； 2) Selective dissolution in a mixed solvent ； 3) Separate insoluble substances ； 4) Precipitation of recycled PVC ； 5) Drying treatment ； 6) Recovery and recycling of solvents 6. What are the uses of EPDM? Reply: EPDM includes terpolymer and dipolymer types. Common applications include: all molded products; general-purpose hoses and heat-resistant hoses for use in automobiles; manufacturing electrical components. Due to its excellent extrusion properties, it can be blended with high-viscosity polymers to improve their extrudability. 7. What material is the beverage bottle cap made of? Reply: It is generally made of PP (polypropylene). 8. Which manufacturers and model numbers do LL0412, LL0501, LL0503, LL0504, and LL0505 correspond to respectively? Reply: LL stands for LLDPE ； The last four digits represent the delivery time, with the first two indicating the year and the last two indicating the month. For example, LL0505 indicates that the product is LLDPE, with a delivery month of May 2005. And so on. 9. Does ABS belong to the category of modified polystyrene? Reply: ABS stands for acrylonitrile-butadiene-styrene copolymer; it does not belong to the category of modified polystyrene. Modified polystyrene falls under PS 10. I want to set up a factory for producing recycled plastic pellets, but I’m not sure what material those woven bags are made of, such as PP, ABS, etc. Reply: PP is generally used to make woven bags ； ABS has high rigidity and is generally used for casings, components, etc. 11. What is the specific gravity of ABS? Reply: The density of ABS is around 1.05 grams per cubic centimeter; it is slightly heavier than water and possesses properties such as toughness, hardness, and rigidity. 12. What is the English code for waste compression pressure? What’s the current price of waste materials? Reply: Acrylic is a special type of plexiglass. PMMA is commonly known as plexiglass; it is also called acrylic. It is an important thermoplastic that was developed quite early on. It boasts good transparency, chemical stability, and weather resistance, is easy to dye and process, and has an attractive appearance, which makes it widely used in the construction industry. The price of transparent acrylic waste is around 10,000 ； As the New Year is approaching, the acrylic waste market is facing a shortage of supply. 13. What kind of PP material is used for syringes? Can it be recycled? How much is it per ton? Reply: The PP material used for syringes is a type called random copolymerized PP; it can be recycled. The current price, including taxes, is around 13,000. Used syringes are considered medical waste and should not be reused to avoid potential hazards. Some netizens recommended South Korea’s RP340R (MI25) or 370Y (MI18) ； It is strongly advised not to use recycled materials, as it can easily lead to medical accidents. . 14. Uses for recycled PET, price, treatment technologies? Reply: Uses: Recycled PET is primarily used for fibers, sheets, and bottles for non-food packaging. Emerging applications include building materials, food packaging, and containers. Japanese companies have utilized polymer alloy improvement technologies to process recycled PET into powder coatings with superior performance compared to those made from virgin PET. Price: No public pricing available; it is generally negotiated on a case-by-case basis. Processing technique: Teijin Corporation in Japan has developed a recycling method for DMT (dimethyl terephthalate) and EG (ethylene glycol) from waste PET bottles. First, the waste PET bottles are crushed and cleaned, then dissolved in EG. At the boiling point of EG and a pressure of 0.1 MPa, the PET is depolymerized to produce bis-hydroxyethyl terephthalate (BHET). After further filtration to remove the filter residue and additives, BHET is reacted with methanol; under the boiling point temperature of methanol and a pressure of 0.1 MPa, an ester exchange reaction takes place to produce DMT and EG. After further distillation, DMT and EG are separated, and then DMT is purified through a recrystallization process ； EG is purified through distillation, and methanol can be reused. The purity of the recovered DMT and EG both reached 99.99%, and the production cost was comparable to that of the conventional DMT and EG methods. DMT can be converted into pure TPA (terephthalic acid), which is used to produce bottle-grade PET resin. The recycling unit can produce about 10% of the raw materials used by the company to manufacture resins. 15. How are waste plastics classified? Reply: The common types of waste plastics are generally classified as PE, PP, PVC, PET, EPS, ABS, PA, etc ； Among them, PE is used in plastic greenhouse materials, industrial packaging films, yogurt bottles, dishwashing liquid bottles, and more ； PP is used for woven bags, packing straps, binding ropes, and some car bumpers, while PVC is used for plastic door and window profiles, pipes, etc ； PET is used for bottles of soft drinks such as Coke and Sprite ； EPS is commonly known as foam plastic. 16. The chemical names of waste plastics, and what plastic products can be made from various types of waste plastics after they are turned into pellets. For example, what can be made from mineral water bottles after they are turned into pellets? What is their chemical name? What can be made from woven bags after they are turned into pellets? Answer: Plastic products made from thermoplastics can be recycled and reprocessed into pellets; this is known as recycled plastic, or **reclaimed material**. Theoretically, its applications are slightly narrower than those of the new material. This is due to the level of recycling and reprocessing technology as well as the specific uses of the finished products: such as food packaging, medical applications, etc. (To avoid harm to human health, recycled materials are generally not used in such products). However, advanced recycling technologies and strict recycling systems have made the properties of recycled materials comparable to those of new materials; in fact, thanks to these properties, new uses can be developed through synthesis and other methods. Domestic technology is lagging behind, and to date, there are no corporate standards or **standards for recycled plastic pellets. Therefore, the quality of recycled plastic materials varies, and their applications depend on their specific technical specifications. 17. What plastic is used to make the IV tubes used in hospitals? Reply: What are the detailed applications of PVC, PE 18, and polytetrafluoroethylene? Reply: Polytetrafluoroethylene (PTFE), commonly known as the \"king of plastics\", is the most produced and widely used type of fluoroplastic, accounting for around 70% of the total fluoroplastic production. It is utilized in various fields such as chemicals, machinery, electrical equipment, construction, electronics, and the automotive industry. 19. May I have some information related to PPR? Aluminum-plastic PPR composite pipes and stainless steel PPR composite pipes. Reply: PPR pipes are suitable for use in domestic and commercial buildings for domestic water supply, potable water supply, and hot water heating systems. They represent an upgraded alternative to copper pipes and galvanized pipes, and can be used in: 1. Residential cold and hot water systems; 2. Water purification and pure water pipelines; 3. Transport and discharge of industrial water and chemicals; 4. Hot water circulation systems; 5. Pipes for compressed air; 6. Food and beverage production and transportation systems; 7. Other industrial and agricultural applications. Steel-plastic composite pipes are environmentally friendly and ideal piping materials widely used in fields such as urban water supply, natural gas, and petrochemical industries. Steel-plastic composite pipes combine the advantages of both metal and plastic: they are resistant to high temperatures and pressures as well as corrosion. Their inner walls are smooth, which results in low resistance and no scaling. They are also non-toxic, pollution-free, antistatic, insulating, and easy to cut and process. 20. What material is used for the plastic in springs? Reply: The main requirements for the plastic properties of springs are as follows: 1. The deformation energy V value should be high (i.e., the spring modulus E value should be low). 2. The strength, especially fatigue strength, should be high. 3. It should be easy to process and shape. Thermosetting fiber-reinforced plastics (FRP) have a higher deformation energy V value than ordinary metals, and can be compared with spring steel ； It also has high strength and a unidirectional stress distribution, making it an ideal material for manufacturing leaf springs. 21. What are the common products used in PCs? What plastic is used to make VCD discs and their packaging boxes? Reply: Polycarbonate (PC) materials possess advantages such as light weight, transparency, high strength, shock resistance, and good processability. Over the course of more than 50 years of development, their application areas have continued to expand. The applications of PC products have spread to industries such as automotive, construction, medicine, and apparel. PC headlights, PC car sunroofs, optical waveguide fibers in automotive communication systems, transparent ceiling panels, PC sheets, and PC syringe tubes are just some examples. In addition, PC materials are also used in various new areas such as self-illuminating systems for swimming pool floors, solar energy collection systems, high-definition large television screens, and chip-marked fibers that enable fabric identification in textiles. PC products are making contributions to various industries, and their potential for application will continue to be further explored. Optical discs are the most well-known area of application in PCs, and they are evolving toward higher storage capacities; the new type of DVD is expected to have a storage capacity of 100 billion bytes. 21. Which are the largest current markets for recycled plastics in our country? Reply: Generally, in areas where the trade in new materials is active, the trade in recycled materials is also active, such as Yuyao, Guangdong, Shandong and other places. 22. What is the common name for ACETAL (diacetaldehyde acetal)? How is the performance? Reply: ACETAL is ethyl acetal; diethanol of ethyl acetal ； Commonly known as plastic steel (in Hong Kong and Taiwan, it is called plastic steel) ； It can be used for outdoor accessories such as buckles; it has high hardness and is moisture-resistant, allowing it to be used in cold or dry environments. 23. What are the plastic raw materials that do not deform at 180 degrees? Reply: Aromatic nylon can withstand high temperatures of up to 260°C; fluoroplastics and other materials can also tolerate such high temperatures.