PE, PP, PVC, PS, PC, PF, EP, ABS, PA, PMMA, and others are collectively referred to as plastic materials, also known as polymer materials. Plastic materials are synthetic materials with plasticity made from polymer compounds through various processing methods. Plastic materials have the advantages of being lightweight, high-strength, corrosion-resistant, and good insulators. They are widely used in packaging, construction, automobiles, electronics, and other fields.
| Material | Description |
|---|---|
| Polyethylene (PE) | Polyethylene is a lightweight, flexible thermoplastic with good chemical resistance. It can be categorized into high-density polyethylene (HDPE) and low-density polyethylene (LDPE) based on different densities. |
| Polypropylene (PP) | Polypropylene has high heat resistance, chemical resistance, and rigidity. It is commonly used for automotive parts and household appliances. |
| Polyvinyl chloride (PVC) | Polyvinyl chloride has good chemical resistance, mechanical strength, and electrical insulation properties. It is often used in pipes, wires, cables, and medical equipment. |
| Polystyrene (PS) | Polystyrene is a transparent, lightweight plastic with good insulation properties. It is widely used in disposable tableware and packaging materials. |
| Polycarbonate (PC) | Polycarbonate is known for its excellent transparency, impact resistance, and temperature resistance. It is often used to make eyeglass lenses, bulletproof glass, and protective covers. |
| Polyoxymethylene (POM) | Polyoxymethylene is an engineering plastic with high crystallinity, strength, and rigidity. It is suitable for manufacturing precision parts and gears. |
| Phenolic plastic (PF) | Phenolic plastic, also known as Bakelite, is a thermosetting plastic with good mechanical properties and heat resistance. It is often used in electrical insulation materials. |
| Epoxy resin (EP) | Epoxy resin is a thermosetting plastic with good bonding properties and electrical insulation. It is widely used in coatings, adhesives, and electronic packaging materials. |
| Acrylonitrile-butadiene-styrene (ABS) | ABS is a common thermoplastic polymer with good mechanical properties and processing properties. It is often used in the manufacture of toys, automotive parts, and electronic equipment housings. |
| Polyamide (PA) | Polyamide, also known as nylon, is an engineering plastic with high strength, toughness, and wear resistance. It is suitable for the manufacture of bearings, gears, and fibers. |
| Polymethyl methacrylate (PMMA) | Polymethyl methacrylate, commonly known as acrylic, is a thermoplastic plastic with excellent transparency and strong weather resistance. It is often used in lighting equipment and billboards. |
PE (Polyethylene)
Physical and chemical properties:
Polyethylene (PE) is a linear polymer with an extremely simple molecular structure consisting of repeated “-CH2-CH2-” units. This structure gives PE a variety of unique physical and chemical properties:
- Lightweight: PE has a low density of approximately 0.91 to 0.96 g/cm³, making it a representative of lightweight materials.
- Chemical corrosion resistance: PE exhibits good chemical stability to most acids, alkalis and salt solutions.
- Electrical insulation: As a non-polar material, PE has excellent electrical insulation properties.
- Low temperature resistance: PE can maintain its physical properties at temperatures as low as -70°C.
- Thermoplasticity: PE can be reshaped after heating, which is convenient for recycling and reprocessing.
Processing methods:
Polyethylene has various processing methods, mainly including the following:
- Extrusion: used to produce pipes, insulation layers of wires and cables, etc.
- Injection molding: suitable for making small containers, toys, etc.
- Blow molding: used to produce hollow bottles and containers.
- Compression molding: Suitable for making larger plastic parts.
- Thermoforming: Used to make thin-walled packaging materials and pallets.
Application areas:
Polyethylene has a wide range of applications, and the following are some of the main application examples:
- Packaging materials: PE films are widely used in food packaging and commodity packaging because of their light weight and good protective properties.
- Plastic pipes: HDPE pipes are often used to transport water and gas because of their chemical corrosion resistance and abrasion resistance.
- Wires and cables: PE is widely used in the manufacture of wires and cables as an insulating material.
- Agriculture: PE is used to make agricultural films, such as mulching technology.
- Medical field: Due to its biocompatibility and chemical resistance, PE is also used to make certain medical devices.
- Automotive industry: PE is used to make automotive parts such as fuel tanks and bumpers because of its light weight and impact resistance.
PVC (Polyvinyl Chloride)
Physical and Chemical Properties
Polyvinyl chloride (PVC) is a polar non-crystalline thermoplastic formed by the polymerization of vinyl chloride monomer. PVC has the following remarkable physical and chemical properties:
- Chemical corrosion resistance: PVC has high resistance to acids, alkalis and salts, but is easily corroded by certain organic solvents.
- Mechanical strength: PVC has good mechanical properties, including tensile strength and impact resistance.
- Electrical insulation: As a non-polar material, PVC has excellent electrical insulation properties.
- Weather resistance: PVC has good resistance to ultraviolet rays and chemicals in the atmosphere and is suitable for outdoor use.
- Thermal stability: PVC needs to add heat stabilizers during processing to prevent thermal decomposition.
Processing methods
PVC can be made into different products through a variety of processing techniques:
- Extrusion: used to produce PVC pipes, door and window frames, cable insulation, etc.
- Injection molding: suitable for the manufacture of small to medium-sized plastic products, such as toys, electrical appliance housings, etc.
- Blow molding: used to produce hollow bottles, containers and other large products.
- Calendering: used to make PVC films and sheets, which are often used in packaging materials and decorative materials.
- Thermoforming: used to make products with complex geometric shapes, such as automotive parts and building components.
Application areas
The application areas of polyvinyl chloride are very wide, and the following are some major application examples:
- Construction industry: PVC is widely used in piping systems, window frames and flooring materials in the construction industry.
- Medical devices: PVC is used to make disposable medical devices such as blood bags and infusion tubes due to its biocompatibility.
- Automotive industry: PVC is used to make automotive interior parts such as dashboards and door panels.
- Electronics industry: PVC is used for insulation layers of wires and cables and housings of electronic devices due to its good electrical insulation.
- Packaging materials: PVC films are used for food and non-food packaging due to its good sealing and chemical resistance.
- Toy manufacturing: PVC is used to make children’s toys and other entertainment products due to its processing performance and cost-effectiveness.
PP (Polypropylene)
Physical and chemical properties
Polypropylene (PP) is a linear thermoplastic made from propylene monomers through polymerization. PP has the following significant physical and chemical properties:
- Heat resistance: PP has a melting temperature between 160 and 170°C, has good heat resistance, and is suitable for the manufacture of products that need to withstand high temperature environments.
- Chemical corrosion resistance: PP has good stability to chemicals such as water, inorganic salts, acids and alkalis, but is easily corroded by certain organic solvents.
- Rigidity: PP has high rigidity, which allows it to maintain its shape when subjected to large loads.
- Fatigue resistance: PP has good fatigue resistance and is suitable for applications that require repeated bending or twisting.
- Thermoplasticity: PP can be repeatedly heated and cooled without losing its physical properties, making it easy to recycle.
Processing methods
Polypropylene can be made into different products through a variety of processing techniques:
- Extrusion: used to produce PP pipes, sheets, rods, etc.
- Injection molding: suitable for the manufacture of small to medium-sized plastic products such as containers, lids, automotive parts, etc.
- Blow molding: used to produce large hollow plastic products such as bottles and barrels.
- Thermoforming: used to make thin-walled plastic packaging containers or pallets.
- Fiber manufacturing: PP can also be made into fibers through stretching and spinning processes for making ropes, carpets, etc.
Application areas
The application of polypropylene is very wide, and the following are some major application examples:
- Automotive industry: PP is widely used to manufacture automotive interior and exterior parts such as dashboards, bumpers, etc. due to its light weight and heat resistance.
- Textile industry: PP fibers are used to make ropes, carpets, clothing, etc.
- Packaging materials: PP is often used in food and non-food packaging materials due to its light weight and chemical resistance.
- Household appliances: PP is used to make household appliance parts such as microwave safe containers and refrigerator drawers.
- Construction industry: PP pipes and sheets are used in piping systems and decorative materials in buildings.
- Medical field: PP is also used to manufacture some disposable medical supplies such as syringes and test tubes due to its biocompatibility.
PMMA (Polymethyl Methacrylate)
Physical and Chemical Properties
Polymethyl methacrylate (PMMA), also known as acrylic, organic glass or acrylic, is a transparent, thermoplastic plastic with high transparency, low price and easy mechanical processing. It is often used as a substitute for glass.
- Density: The density of PMMA is about 1.15-1.19g/cm³, which is lighter than glass.
- Mechanical Strength: With a high relative molecular mass and long-chain polymer structure, PMMA has high strength, and its tensile and impact resistance are 7 to 18 times higher than that of ordinary glass.
- Melting point: The melting point of PMMA is low, much lower than about 1000°C of glass.
- Light transmittance: The light transmittance of PMMA is as high as 92%, which is better than ordinary glass.
- Chemical stability: PMMA has good resistance to most inorganic acids, alkalis and salts, but is easily corroded by certain organic solvents such as acetone and chloroform.
Processing methods
PMMA can be processed by a variety of methods:
- Casting: suitable for manufacturing large products, such as bathtubs, large lamps, etc.
- Injection molding: suitable for mass production of small products, such as toys, small appliances, etc.
- Machining: can be cut, drilled, etc. by tools such as lathes and drill presses.
- Thermoforming: suitable for manufacturing products with complex shapes, such as automotive parts, aviation parts, etc.
- Blow molding, injection, extrusion: suitable for manufacturing pipes, rods, plates, etc.
Application areas
PMMA has a wide range of applications, including:
- Construction industry: used for building lighting, transparent roofs, sheds, telephone booths, stairs and room wall panels, etc.
- Automotive industry: used to manufacture car lights, windows, etc.
- Medical devices: Due to its good transparency and chemical stability, PMMA can be used to manufacture medical equipment and instruments.
- Optical products: Due to its high light transmittance, PMMA can be used to manufacture eyeglass lenses, optical instruments, etc.
- Advertising industry: used to make advertising light boxes, signs, signs, etc.
- Household items: such as decorations, bathroom facilities, handicrafts, etc.
- Lighting equipment: used to make transparent covers for various lamps.
PC (Polycarbonate)
Physical and chemical properties
Polycarbonate (PC) is an amorphous thermoplastic with high transparency and excellent mechanical properties. The physical and chemical properties of PC are as follows:
- Transparency: PC has a light transmittance of up to 90%, making it an ideal material for making transparent plastic products.
- Impact resistance: PC has extremely high impact strength and can maintain its impact resistance even at low temperatures.
- Temperature resistance: PC has a glass transition temperature of around 150°C, has good short-term heat resistance, and is suitable for high temperature environments.
- Weather resistance: PC has a certain tolerance to ultraviolet rays, but may degrade if exposed to sunlight for a long time.
- Mechanical properties: PC has good tensile strength, bending strength, and compressive strength.
Processing methods
Polycarbonate can be made into a variety of products through the following processing techniques:
- Injection molding: Suitable for the production of precision plastic products such as eyeglass lenses, mobile phone housings, etc.
- Extrusion: Used to produce PC films, pipes, rods, etc.
- Thermoforming: Used to make large plastic products such as automotive parts and protective covers.
- Compression molding: Suitable for making thick-walled or complex-shaped plastic products.
- Blow molding: Although not commonly used for PC, it is also used in some special applications.
Application areas
The application areas of polycarbonate are very wide. Here are some major application examples:
- Eyewear industry: PC is often used to make safety glasses lenses due to its light weight and impact resistance.
- Automotive industry: PC is used to make car headlights, taillights and windows and other parts.
- Electronic appliances: PC is used to make housings and protective covers for electronic devices such as computers, mobile phones, and televisions.
- Construction industry: PC sheets are used for skylights, skylights, and guardrails in buildings.
- Medical devices: The transparency and chemical resistance of PC make it suitable for making some medical devices and containers.
- Safety equipment: PC is used to make bulletproof glass, helmets, and other protective equipment.
PA (Polyamide)
Physical and chemical properties
Polyamide (PA), commonly known as nylon, is a synthetic polyamide plastic with excellent physical and chemical properties:
- High strength and toughness: PA contains amide groups in its molecular chain, which makes it very strong and tough, especially in low temperature environments.
- Wear resistance: PA has a low friction coefficient and good wear resistance, making it suitable for manufacturing bearings and gears, etc.
- Chemical corrosion resistance: PA has good resistance to most organic solvents, alkalis and salts, but is susceptible to corrosion by certain acids and oxidants.
- Thermal stability: PA can be used at higher temperatures, but long-term exposure to high temperatures may cause thermal degradation.
- Hygroscopicity: PA has a certain hygroscopicity, which may affect its mechanical properties and dimensional stability.
Processing methods
Polyamide can be made into various products through the following processing techniques:
- Injection molding: Suitable for the production of various plastic products with complex shapes, such as gears, bearings, etc.
- Extrusion: Used to produce PA pipes, rods, monofilaments, etc.
- Blow molding: used to make hollow plastic bottles and other containers.
- Thermoforming: used to produce large plastic products, such as automotive parts and protective covers.
- Compression molding: suitable for the production of products with high transparency requirements, such as transparent packaging boxes, etc.
Application areas
The application areas of polyamide are very wide. The following are some major application examples:
- Automotive industry: PA is widely used to make automotive interior and exterior parts, such as engine parts, door handles, etc., due to its light weight and impact resistance.
- Electronics and electrical appliances: PA is used to make insulating parts of electrical equipment and housings of electronic equipment.
- Textile industry: PA fibers are used to make wear-resistant clothing fabrics, carpets and fishing nets, etc.
- Packaging materials: PA is used to make food packaging and industrial packaging materials, such as food films and heavy-duty packaging bags.
- Machinery industry: PA is used to make bearings, gears and other mechanical parts because of its wear resistance and self-lubricating properties.
- Consumer goods: PA is used to make a variety of consumer goods, such as toothbrushes, combs and sporting goods.
ABS (Acrylonitrile-Butadiene-Styrene)
Physical and Chemical Properties
Acrylonitrile-Butadiene-Styrene (ABS) is a common thermoplastic polymer, which is copolymerized by three monomers: acrylonitrile, butadiene and styrene. ABS combines the characteristics of the three monomers and has the following remarkable physical and chemical properties:
- Comprehensive performance: ABS has good mechanical properties, such as high strength, high toughness and good hardness, making it the material of choice for many applications.
- Impact resistance: Due to the addition of butadiene, ABS has excellent impact resistance, which can be maintained even at low temperatures.
- Processability: ABS is easy to process and can be formed by injection molding, extrusion, thermoforming and other methods.
- Thermal stability: ABS has good thermal stability during processing, but the long-term use temperature is usually not more than 80°C.
- Electrical insulation: As a non-polar material, ABS has good electrical insulation properties.
- Chemical corrosion resistance: ABS has good stability to chemicals such as water, inorganic salts, acids and alkalis, but is easily corroded by certain organic solvents.
Processing methods
ABS has a variety of processing methods, mainly including the following:
- Injection molding: The most commonly used processing method for ABS, suitable for the production of various complex-shaped plastic products, such as toys, automotive parts, etc.
- Extrusion: Used to produce ABS pipes, rods, plates, etc.
- Thermoforming: Used to manufacture large plastic products, such as automotive parts and protective covers.
- Blow molding: Although not commonly used for ABS, it is also used in some special applications.
- Compression molding: Suitable for the production of products with high transparency requirements, such as transparent packaging boxes, etc.
Application areas
ABS has a wide range of applications, and the following are some of the main application examples:
- Automotive industry: ABS is widely used to manufacture automotive interior and exterior parts, such as dashboards, bumpers, etc., due to its light weight and impact resistance.
- Electronic appliances: ABS is used to manufacture the housing and protective covers of electronic devices such as computers, mobile phones, and televisions.
- Office equipment: Printers, copiers and other office equipment often use ABS to manufacture housings and internal parts.
- Toy manufacturing: ABS is widely used to manufacture children’s toys and game consoles due to its processability and cost-effectiveness.
- Packaging materials: ABS is used to manufacture packaging containers and display racks with certain special requirements.
- Construction industry: ABS is used to produce insulation materials, decorative panels and other construction products.
- Medical devices: Transparency and chemical resistance make ABS suitable for parts of certain medical devices.
PF (phenolic plastic)
Physical and chemical properties
Phenolic plastic (PF), also known as bakelite, is a thermosetting plastic widely used in the industrial field for its excellent mechanical properties and heat resistance.
- Heat resistance: PF has a high heat deformation temperature, usually above 150°C, which enables it to remain stable in high temperature environments.
- Mechanical properties: PF has high hardness and strength, and can maintain these properties in long-term use and is not easy to deform.
- Electrical insulation: As a non-polar material, PF has good electrical insulation properties and is suitable for electrical insulation materials.
- Chemical corrosion resistance: PF has good stability to most chemicals, including acids, alkalis and organic solvents.
- Thermosetting: PF will not melt again after processing and molding, and has irreversible thermosetting properties, which makes it have good dimensional stability after molding.
Processing methods
The processing methods of phenolic plastics mainly include compression molding, transfer molding and injection molding.
- Compression molding: It is the most commonly used processing method for PF, which is to put the raw materials into the mold and then apply high temperature and pressure to solidify it.
- Transfer molding: Suitable for manufacturing products with complex shapes or fine patterns, by heating the raw materials and transferring them to the mold under pressure to form them.
- Injection molding: Suitable for mass production of small products, by injecting the raw materials into the mold and quickly curing and forming them under high temperature and high pressure.
Application areas
Phenolic plastics have a wide range of applications, including:
- Electrical industry: PF is widely used to manufacture various electrical insulation materials and electronic equipment housings due to its excellent electrical insulation properties and heat resistance.
- Automotive industry: PF is used to manufacture automotive ignition system components, heaters and other high-temperature resistant components.
- Construction industry: PF is suitable for manufacturing pipes, valves and decorative materials due to its heat resistance and chemical corrosion resistance.
- Aerospace: PF is used to manufacture non-structural components such as insulation materials and decorative panels inside aircraft.
- Industrial products: PF is used to manufacture various industrial machinery parts, such as bearings, gears and pump parts.
- Daily necessities: PF is also used to manufacture some daily necessities, such as electrical switches, buttons and handles.
