PETG, short for poly - ethylene terephthalateco - 1, 4 - cylclohexylenedimethylene terephthalaate, is a transparent, non - crystalline copolyester. Here is a detailed introduction:
It is produced by the polycondensation reaction of three monomers: purified terephthalic acid (PTA), ethylene glycol (EG), and 1,4 - cyclohexanedimethanol (CHDM).
Compared with PET, it has an additional 1,4 - cyclohexanedimethanol comonomer, and compared with PCT, it has an additional ethylene glycol comonomer. Its unique composition endows it with special properties.
Transparency: The products are highly transparent, with a transparency of over 91%. They have a good texture and can meet application scenarios with high transparency requirements.
Mechanical Properties: It has good toughness, impact strength, and rigidity. Extruded sheets are usually 15 - 20 times tougher than general - purpose acrylic and 5 - 10 times tougher than impact - modified acrylic. Its physical properties are also good at a low temperature of - 40℃.
Processing Performance: It has excellent processing and molding performance. It can adopt traditional molding methods such as extrusion, injection molding, blow molding, and thermoforming. It can also undergo secondary processing such as sawing, die - cutting, and drilling. Moreover, no preheating is required during thermoforming, with high precision, a shrinkage rate of 2% - 3%, good deep - drawing formability, no cracking, and uniform thickness.
Chemical Resistance: It has good tolerance to most acids, alkalis, and organic solvents. It has excellent hydrolysis resistance at room temperature and low water absorption.
Weather Resistance: It contains an ultraviolet absorber and can be co - extruded into a protective layer to resist ultraviolet rays, maintain the toughness of the product, and prevent yellowing.
Environmental Friendliness: The base material is an environmentally friendly material and can be recycled. The packaging products made from it will eventually decompose into water and carbon dioxide after being discarded. Some meet the food contact management requirements and have FDA food certification.
General - purpose PETG: A common transparent plastic with good processability and physical properties. It has a relatively low melting point, is easy to process, and is suitable for various molding methods. It is used for packaging, transparent casings, commercial display items, etc. However, it is prone to degradation in a strong chemical substance environment.
Toughened PETG: A toughening agent is added. While maintaining transparency, it improves toughness and impact resistance. It is used in occasions with higher strength requirements, such as automotive parts.
UV - resistant PETG: UV - resistant components are added. It can effectively resist UV damage even when exposed to sunlight for a long time. It is suitable for outdoor environments.
Reinforced PETG: Reinforcing materials such as glass fiber and carbon fiber are added, which significantly improve mechanical properties and heat resistance. It is used in industrial fields that require high strength and high temperature resistance.
Packaging Field: Used for the packaging of food, medicine, cosmetics, etc., such as beverage bottles, medicine bottles, perfume bottles, and cosmetic packaging. With high transparency, good barrier properties, and environmental friendliness, it attracts consumers and protects product quality.
Electronics and Electrical Appliances: Used to make electrical casings, display screen protective covers, electronic component trays, etc., utilizing its insulation, chemical resistance, processability, and appearance properties.
Building Decoration: Used for indoor and outdoor signs, display racks, shelves, outdoor installations, booths, protective panels, game machine panels, vending machine panels, etc., combining aesthetics and durability.
Medical Devices: Used to manufacture medical device components, such as filters, eustachian tubes, pipe connectors, pumps, clamps, and dialysis equipment, meeting hygiene, safety, and performance requirements.
Automotive Industry: Used to make headlight covers, interior decorative parts, etc., leveraging its characteristics of impact resistance, weather resistance, and good processability.
3D Printing: As a 3D printing material, it combines the advantages of PLA and ABS. It does not require a very high printing bed temperature, has excellent printing results and details, and can be fiber - reinforced. It is used for engineering design, prototyping, functional testing, part assembly, toys, and decorations.
