Despite all these studies, Li et al. PET does protect against diluted acids, oils, and alcohols that attack HDPE. PET is made from a combination of MEG and dimethyl terephthalate (DMT) (C6H4(CO2CH3)2) but primarily terephthalic acid, also called "PTA" for purified terephthalic acid. In addition, it has a wide range of printing temperatures and may be slow to print. Yahia, L.K. This article explains what PET is and how it is made. | The Definitive Guide. Researchers at the University of Edinburgh (opens in new tab) have been using E. coli bacteria to convert plastic into vanillin, the primary component of vanilla bean extract. 2 Safety This enzyme can also break down Polyethylene furanoate (PEF), a sugar-based bioplastic. Ethylene glycol is usually called "MEG," standing for monoethylene glycol. Polyethylene terephthalate, better known as PET Plastic (also sometimes as PETE ), is the most used thermoplastics globally in various textiles, films, electronics, packaging, automobiles, etc. [68,69]. Copyright 2023 Elsevier B.V. or its licensors or contributors. However, the PLA crystallinity decreased only when PET was crystalline. Because it is inert, it is resistant to attack by micro-organisms and won't biologically degrade. ScienceDirect is a registered trademark of Elsevier B.V. ScienceDirect is a registered trademark of Elsevier B.V. It is also commonly used for packaging salad dressings, peanut butter, cooking oils, mouthwash, shampoo, liquid hand soap, window cleaner, and tennis balls. Polycarbonate has better catch resistance and is easier to wash, but PET resin is cheaper than polycarbonate; however, that doesnt necessarily translate into good profits as equipment to process PET bottles are more expensive. In fact, 100% of 2-L beverage containers and liquid products are made with PET. It provides a barrier to oxygen, water, and carbon dioxide and is identified with the number 1. The miscibility of PLA/PET blends was also confirmed over the entire blend composition range by Fu et al. Polyethylene terephthalate or P.E.T is derived from plastic soft drinks and bottles. The branched form of polyethylene , known as low-density polyethylene (LDPE). This article was written by various Xometry contributors. However, in 2016 Japanese scientists made a remarkable discovery that could help tackle the world's plastic problem, according to the journal Science (opens in new tab). Table 6.11. Excellent for mild and strong buffers, good chemical resistance, Good water vapor and alcohol barrier properties. It is easier to fabricate than polycarbonate and the standard grade is made from FDA approved resin. Table 4.26. Scientists then stitched their DNA together to form a super enzyme. Total market size is likely to increase from US$ 2,747.8 million in 2023 to US$ 3,818.9 million by 2033. By continuing you agree to the use of cookies. As WebThe Advantages and Disadvantages of HDPE. Therefore, all aspects involving the industrial production (with traditional and sustainable chemical routes), intrinsic physicochemical/thermal/mechanical properties, undesired degradation phenomena, chemical/mechanical recycling processes, and processability of PET are here critically discussed. The semicrystalline PET has good strength, ductility, stiffness, and hardness. Nara Loca Abadi is a recycled plastic specialist that promotes the use of recycled PET flakes, recycled PET chips, recycled PP & HDPE granules to various plastic and polyester manufacturers. Different grades of this polymer are used in various industries with a wide range of molecular weights and the manufacturing of beverage bottles. Scott has a masters in science and environmental journalism and a bachelor's degree in conservation biology degree from the University of Lincoln in the U.K. During his academic and professional career, Scott has participated in several animal conservation projects, including English bird surveys, wolf monitoring in Germany and leopard tracking in South Africa. Figure 6.13. Laurence W. McKeen, in Permeability Properties of Plastics and Elastomers (Fourth Edition), 2017. The properties of PET and PBT are shown in Table 8.8. In addition, no evidence of toxicity has been detected in feeding studies using animals. It is transparent to microwave radiation. WebReviu Jenis, Aspek Perlindungan dan Migrasi Bahan Kemasan dalam Pengemasan Minyak Nabati (Review of Types, Protection Aspects, and Migration of Packaging Materials in Packaging of Vegetable Oil) Polyethylene (PE) is one of the most popular thermoplastic materials. 1 summarizes the global plastic distribution by continent based on production from various industrial sectors, a summary of single-use plastics, and the life cycle of plastics. Hi Friend, It has a broad range of use temperatures, from -60 to 130 C. Polyvinyl chloride (PVC) is a popular thermoplastic that's odorless, solid, brittle, and generally white in color. PET can be used for blow-molded bottles in automotive applications. ","acceptedAnswer":{"@type":"Answer","text":"PET is identified by recycling code \"1\" which means its the most recyclable thermoplastic in the world. The PLA/PET blends were found to be miscible through the whole composition range. Figure 4.37. Figure 4.32. The polymers are easily available and inexpensive. One of the first research papers in melt electrospinning evaluated PET and polyethylene naphthaled blends [147]. It is shatterproof, recyclable, and transparent to microwave radiation. PET fiber products are used as implants like vascular grafts, artificial heart valve sewing rings, and artificial blood vessels because of their excellent mechanical properties, porosity, and reasonable biocompatibility.7274 Many studies have been conducted to evaluate the biocompatibility of PET-woven and nonwoven implants. PET resins are even susceptible to oxidation. It is what it is, Ask a relief, usage of PET is steadily decreasing worldwide bcoz of its severe effects on the environment. The material is virtually shatterproof, which improves its applicability by many nautches. Have a fantastic day. WebSerious accidents have included explosions, chemical fires, chemical spills, and clouds of toxic vapor. Even with its popularity, there are some advantages and disadvantages you should consider before using HDPE for your Polyethylene terephthalate (PET) bottle has been increasingly used in recent years and treatment of the postconsumer PET bottle poses economic and environmental problems. In this research, polyethylene terephthalate was Various depolymerization techniques such as glycolysis, methanolysis, aminolysis, ammonolysis, hydrogenation, and hydrolysis rely upon chemical agents used for PET chain scission. PET is somewhat vulnerable to oxidation (But nothing is rock solid proof about this). Resins made from PET can oxidize, resulting in a degradation in the taste of food and beverages when the items have a long shelf life and are stored in PET packaging. A particular emphasis has been dedicated to the role of PET in the packaging industry. If PET is reheated above Tg, crystallization takes place up to 30%. The main features concerning the use of PET in the packaging industry were discussed. Mireles, in Characterization of Polymeric Biomaterials, 2017. Also, regulations, testing methods and analytical Buyers seeking quotes for parts are responsible for defining the specific requirements for those parts. Initial Property Values for Fig. Main elements and BE energy values can be detected in the surveys reported in Fig. Aggregate, bitumen of grade 60/70 and crushed plastic bottle waste were utilized in this study. 3.3 Advantages and disadvantages 75; 3.4 Types of Bio-based and/or Biodegradable Plastics 75; 3.5 Market leaders by biobased and/or biodegradable plastic types 77 Polyethylene terephthalate (Bio-PET) production capacities 2019-2033 (1,000 tons) 86; Figure 20. Advantages and Disadvantages of Polyethylene Terephthalate. and Torres-Huerta et al. Millions of plastic bottles are used for the production of polyester. Ans. Table 20. It is available in different crystalline structures, referred to as HDPE, LDPE, and LLDPE. "}},{"@type":"Question","name":"Why is PET recycling easy? The degraded products of PET after aminolysis and glycolysis find potential applications as chain extenders, plasticizers, corrosion inhibitors, precursors, and cross-linking agents in the production of by-products such as textile dyes, PURs, resins, vinyl esters, epoxy resins, and antibacterial drugs. Advantages of PET Resin. Please refer to our terms and conditions for more information. Figure 6.14. Permeation of Gases at 23C Through Mitsubishi Polyester Film Hostaphan RN 25 Biaxially Oriented PET Release Film [13], Table 6.17. Polyethylene terephthalate (PET) is a thermoplastic material commonly used in the form of fibres and films, whose stability in environmental applications is of substantial interest.23, From: Fibrous and Composite Materials for Civil Engineering Applications, 2011, Myungwan Han, in Recycling of Polyethylene Terephthalate Bottles, 2019. It has high tensile strength The main drawbacks are the low purity of TPA and the fact that this is a comparatively slow option since it is a weak nucleophile. Thus, easy and inexpensive to transport. Due to its abundant waste products, it has become a problem for the environment. The Effect of Ionizing Irradiation on the Mechanical Properties of Polyethylene Terephthalate with Internal Lubricant (According to IEC Standard 544 and ISO Standard 178) [14]. Recycling includes a series of washing processes; after that, it can be reused. Things like polyethylene terephthalate (PET) have oxygen in the backbone. What is linear low-density polyethylene (LLDPE)? ","acceptedAnswer":{"@type":"Answer","text":"REcycling PET si nether easy nor difficult. Due to its intensive production, the disposal of waste PET has been an environmental problem for many years. The thermal and mechanical characteristics of blends of PLA and PET were studied by Girija et al. Ans. Harms: PET is known to leach antimony trioxide and phthalates. Hydronic radiant heating and cooling systems, and. This commodity plastic is Therefore, drinking water from a polyethylene terephthalate bottle that has been left in a hot car, frozen, or washed and used more than once, does not pose any health risk. Can I know when antimony that is sometime found in PET Plastic is appeared i.e., at what temperature and duration in direct sunlight? Manufacturers and trade names: DuPont Rynite, DuPont Teijin Films Mylar and Melinex, Mitsubishi Polyester Film Hostaphan, Celanese Impet, Toray Industries Lumirror. Those toxins can accumulate and transfer up the food chain from marine life into humans, whenever we eat something that has been taken from the sea. However, instead of direct use of PET in building materials, alternative methods may also be preferred. [67]. | The Definitive Guide, For PET Plastic, like other thermoplastics, the making process starts with hydrocarbon fuels filtration into smaller parts called fractions.. At what temperature do plastic bottles melt? Fibrous and Composite Materials for Civil Engineering Applications, Depolymerization of PET Bottle via Methanolysis and Hydrolysis, Recycling of Polyethylene Terephthalate Bottles, Electrofluidodynamic technologies for biomaterials and medical devices, Electrofluidodynamic Technologies (EFDTs) for Biomaterials and Medical Devices, Performance of dioctyl terephthalate concrete, Use of Recycled Plastics in Eco-efficient Concrete, X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF SIMS), Characterization of Polymeric Biomaterials, Effect of Radiation on the Properties of Polyester Polymers, The Effect of Radiation on Properties of Polymers. This source is used for total absorbed doses up to 1MGy. Heres how it works. It conventional methods such as injection, blow or extrusion molding, because this material does not flow even at temperatures above its melting point. Cancer. Its structure is shown in Fig. PET is not a biodegradable plastic, which may be a disadvantage depending on the intended application. 8.9. The main achievements in the PET processing for food packaging are presented, analyzing advantages and disadvantages of each technology. It absorbs very little water. The recycling number or resin identification code set by the Society of Plastics Industry (SPI) in 1988 is number 1. PET can be used in fiber applications. 4.314.38 and Table 4.254.30. This article summarized the characteristics, uses, advantages, limitations, and toxicity of Polyethylene Terephthalate. For successful nucleic acid delivery for cancer treatment, the crucial problem associated with the use of PEG, i.e., the "PEG dilemma" must be resolved. The rheological properties of PET from recycled bottles were negatively affected by the presence of PLA (up to 5wt.%) [74]. Water Vapor Permeation at 38C and 90% Relative Humidity Through DuPont Teijin Films Mylar PET films [12], Table 6.15. Nylon Structure | A Comprehensive Overview. These kinds of occurrences have caused deaths, injuries, evacuations and major property damage. For glass fiber reinforced PET materials, bending deformation is very easy to occur at high temperatures. Kelapa Hybrida, Blok G1/3,Kelapa Gading, Jakarta Utara, 14240. Fillers are added to improve the surface finish, reduce warpage, and provide other desired benefits. Various grades of PET have been used for investigating the effect of intrinsic viscosity on fiber diameters [109]. In general, PET can only be molded by a screw-type injection molding machine. It has a fantastic set of different properties, making it very attractive for manufacturers like chemical, mechanical, thermal resistance, and dimensional stability. [73]. Adding them to your business would help you bring down the costs substantially and shoot your profits sky-high. At the moment, the latter ones aren't discussed in this guide, but a detailed list of commercially available grades is just a click away! Researchers used thermogravimetric and differential scanning techniques to analyze the change in thermal and crystalline properties of fibers before and after electrospinning. PET is a semiaromatic polymer synthesized from ethylene glycol and terephthalic acid. Agencies like FDA, Health Canada and EFSA have given it a free flag. 74; Table 22. New scientific studies conducted in the US show that PET and HDPE bottles have a significant market share in the American bottling industry and can be recycled at least 10 times. The irradiations are made in air at ambient temperature. ScienceDirect is a registered trademark of Elsevier B.V. ScienceDirect is a registered trademark of Elsevier B.V. Polyethylene terephthalate (PET) in the packaging industry, PET was first created in the mid-1940s by DuPont chemists attempting to develop new synthetic fibers. In many applications, PET is first preshaped in an amorphous state and then given a uniaxial (fibers or tapes) or biaxial (film or containers) crystalline orientation. HDPE can withstand temperatures ranging from -110 to 165 F. Unlike PET, HDPE is not clear but can be used to make semi-opaque bottles. Ans. At the same time, thanks to the industrial progress, it is possible to obtain more versatile and specific chemical structures in order to synthetize polymers with ad-hoc They are quite similar on the surface but do have some differences that set them apart. Property retention of Mylar PET film after irradiation in a nuclear reactor [25]. An artistic illustration of plastic-eating bacteria. PET resin is commonly used thermoplastics as it offers many benefits such as: The polymers are easily available and inexpensive. How to Choose the Right Lubricants For Plastic Parts? However, it doesnt look exciting compared to other highly transparent polymers like Polycarbonate and Acrylic. Polymer Modified Bitumen (PMB) was prepared using a high shear laboratory type mixer rotating at a speed of 1100 rpm with varying PET content of 2%, 4%, Polyethylene has many useful properties which make it Polymer Modified Bitumen (PMB) was prepared using a high shear laboratory type mixer rotating at a speed of 1100 rpm with varying PET content of 2%, 4%, Dacron fabric is used to make fibers for clothing, storage containers for food and beverage, thermoplastic resins, and more. These special properties allow the product to be used in several high-performance applications. 4.38 [13]. It is available in abundance and is Being lightweight also provides for cost savings when transporting products using PET packaging. Polyethylene Terephthalate is not considered toxic. Cancer. How many times PET bottles can be recycled? Bakowsky et al. According to Future Market Insights (FMI), the global market for polyethylene terephthalate glycol (PETG) is forecast to accelerate at 3.3% CAGR between 2023 and 2033. The table shows that PET has higher density, tensile strength, tensile modulus than PBT. PET can also be partially depolymerized to oligomers and other substances. Get Traffic & Exposure. Polyester is one of many heterochain thermoplastics, which has atoms other than C in the backbone chain. Both plastic materials are heavily utilized in the plastics processing industry, and they have advantages and disadvantages. WebPyrolysis processed plastic wont have any contaminants, where mechanical recycling might have some colour or odour contamination. PET has low gas permeability, particularly with carbon dioxide. WebPolyethylene terephthalate (PET) is clear, tough, and shatterproof. What is cross-linked polyethylene (PEX or XLPE)? The by-products, fumaric acid and glycols, dissolved in the aqueous solution can be recovered and separated. Polyesters include unsaturated for thermosets with CC bonds and saturated for aromatic thermoplastic polyesters with CC bonds. The effect of beta (electron) irradiation on the color of PET [17]. The reaction of PET with water under basic, acidic, and neutral environmental conditions at high pressure and temperature, breaks the polymer chains down into EG and TPA; this reaction process is known as hydrolysis. Polytrimethylene terephthalate (PTT) market analysis-manufacture, advantages, disadvantages and applications. While antimony may contribute to cancer development, skin problems, menstrual and pregnancy issues, phthalates are endocrine disruptors. PET exists both as an amorphous (transparent) and as a semicrystalline (opaque and white) thermoplastic material. Future US, Inc. Full 7th Floor, 130 West 42nd Street, If youd like more information about how you could reduce your plastic use, check out "How to Give Up Plastic: A Guide to Changing the World, One Plastic Bottle at a Time (opens in new tab)" by Will McCallum and "How to Save the World For Free (opens in new tab)" by Natalie Fee. Both PC and PET have their pros and cons. et aussi face la radicalaire. These polymers predominantly react with crystallization, thereby changing or lowering the polymers temperature. Polyethylene terephthalate is a clear, strong, and lightweight plastic widely used for packaging foods and beverages. Special grades of PET are used for carry-home food containers and prepared food trays that can be warmed in the oven or microwave. Effect of gamma irradiation on the instrumented dart impact energy of amorphous PET [23]. Dacron is generally found in the same common applications as polyester in the textile industry. High electrical and insulation properties, Better heat resistance, XLPE power cable can typically stand up to 260C, Has better tensile strength and impact resistance, Higher eligibility for higher rated current applications. Can plastic eating super-enzymes solve our destructive plastic problem? Post-consumer poly (ethylene terephthalate) (PET) waste disposal is an important task of modern industry, and the development of new PET-based value added products and methods for their production is one of the ways to solve it. Any performance parameters, geometric tolerances, specific design features, quality and types of materials, or processes should not be inferred to represent what will be delivered by third-party suppliers or manufacturers through Xometrys network. Like HDPE, PET can be matched to any color. In this research, polyethylene terephthalate was The material has lower heat resistance when compared to other polymers. Polyethylene Terephthalate is a 100% recyclable material and, to its credit, is the most recycled thermoplastic in the world. As for example, they are not used for storing beer or wine as the shelf life of these beverages is long such that some kind of taste degradation may occur. Analyzing the survey (Fig. The textile industry consumes approximately 60% of that, and other major consumers include the packaging and bottling industry with 30%. As a result, its melt viscosity is extremely high and normally can only be processed by powder sintering methods. Microplastics are also ingested by many marine species that are both preyed upon by other species and that we catch for food. According to many worldwide reports, PET, with an annual production of 56 metric tons, is the most used thermoplastic in the world. Even though PBT is a high-grade engineering plastic, it is not suitable for more extreme environments. As shown in Fig. Retraction speed should be slow at 30mm/s or less. Because PET has phenomenal water and barrier resistive properties, it is often used to manufacture plastic bottles for mineral water, alcohol, and carbonated drinks. It exhibits excellent electrical insulating properties. WebIn general, high density grades of polyethylene have densities up to 0.97 g/cm^. The most common processing technique used for LDPE is extrusion (tubes, blow and cast films, cables). The following is a list of Polyethylene Terephthalate (PET) grades: The commercial grades of PET are flame retardant, heat resistant, glass-reinforced, and various other engineering materials offering good strength. These PET degradation alternatives including various methanolysis and hydrolysis methods are reviewed. This makes it unsuitable for use in outdoor applications. 8.9. The glass conversion temperature of PET is about 165, and the temperature range of the material is 120~220. While many consumers have erroneous assumptions about PET, it does not contain BPA, phthalates, dioxins, cadmium, lead, or endocrine disruptors. To be honest, I think wood will be the best option for making a beehive, but PET or PETF will also work. That's why, America's beverage companies use it to make our beverage bottles. It is very lightweight. Initial Property Values for Fig. Laurence W. McKeen, in The Effect of Radiation on Properties of Polymers, 2020. PET provides a strong gas and moisture barrier, making it a popular choice for plastic bottles for drinks, sauces and salad dressings; microwaveable food trays; and food packaging. As of 2022, ethylene glycol is made from natural gas, and terephthalic acid comes from p-xylene created from crude oil. Glycolysis of PET undergoes three substages: Monomers, dimers, and oligomers (George and Kurian, 2014). In addition, PET containers are often regarded best for maintaining the taste and aroma of food, thanks to their great oxygen barrier properties. Table 6.18. In addition, it was expected the amount of nitrogen increased in PET-Hep and PET-Hep-Col, and finally the traces of sodium and sulfur presented in native heparin and native collagen were observed only on the surface of PET-Hep and PET-Hep-Col as a result of successful immobilization of heparin, and coimmobilization of heparin and collagen. It doesnt break or fracture. PRO/CONS ? Polyethylene terephthalate (PET) is the third most widely diffused polymer exploited in the packaging industry, monopolizing the bottles market for beverages, and covering almost the 16% of the European plastic consumption in the packaging industry. Polyethylene terephthalate has high strength and stiffness. It exhibits excellent electrical insulating properties. It is very lightweight. It has good gas (oxygen, carbon dioxide) and moisture barrier properties. It has a broad range of use temperatures, from -60 to 130 C. This article explores the advantages and disadvantages of both forms of feeding. Advantages. Manufacturers and trade names: DuPont Rynite, DuPont Teijin Films Mylar and Melinex, Mitsubishi Polyester Film Hostaphan, Celanese Impet, Toray Industries Lumirror. Chemical Resistance:PET has a significant amount of resistance toward the water, food, and natural cause like bacteria, fungi, etc. In this chapter, DOTP-reinforced concrete performance studies in the literature will be comparatively examined with that of PET-reinforced concrete studies. On the other hand, PP containers fare better in moisture, alcohol, and chemical resistance. Lab-grown minibrains will be used as 'biological hardware' to create new biocomputers, scientists propose, Ancient Roman 'spike defenses' made famous by Julius Caesar found in Germany, 'Building blocks of life' recovered from asteroid Ryugu are older than the solar system itself, New Moai statue that 'deified ancestors' found on Easter Island, The ultimate action-packed science and technology magazine bursting with exciting information about the universe, Subscribe today and save an extra 5% with checkout code 'LOVE5', Engaging articles, amazing illustrations & exclusive interviews, Issues delivered straight to your door or device. WebPolyethylene (PE) is one of the most popular thermoplastic materials. PET or Polycarbonate? After analyzing the bacteria, the scientists found that it produced two digestive enzymes called hydrolyzing PET or PETase. Using single-screw extrusion, partial miscibility of PLA/PET blends was reported for a maximum content of 7.5wt.% PLA [72]. WebHowever, PEGylation strongly inhibits cellular uptake and endosomal escape, which results in significant loss of activity of the delivery system. Additionally, PET bottles and containers that are discarded in landfills pose no risk of harm or leaching. The combined PETase-MHETase enzyme was created with a synchrotron, a type of particle accelerator that uses x-rays 10 billion times brighter than the sun, according to the University of Portsmouth. ), blow molding and rotomolding. After degrading PET plastic into its basic monomers, researchers took the process one step further and converted one of those monomers, terephthalic acid, into vanillin through a series of chemical reactions. Polyethylene terephthalate (PET) is the most recycled plastic in the world. Thus they could be applied in various applications [65]. PET is perfectly compatible with injection moulding, Blow Molding, Extrusion Molding, and 3D Printing processes. Just 16% of all plastic produced is recycled to make new plastic, according to the BBC (opens in new tab). 4.36 [13]. 4.2: C1s at 284.8eV, O1s at 531eV, Si2p at 102eV, N1s at 400eV, Na1s at 1072eV, and S2p at 163.9eV. L'H. PET possesses a high strength-to-weight ratio (a rare quality found). Manufacturers use these recycled PET flakes for strapping, films and sheets, Food and beverages containers, carpets, flee bags, etc. PET is smack and fracture proof, making it a good alternative to glass in many applications. "}},{"@type":"Question","name":"What does PET plastic stand for? The essential elements of PET are ethylene glycol and terephthalic acid, combined to form a polymer chain. Xometry offers injection molding services and 3D printing using a variety of materials. Degradation phenomena occurring during PET life and processing were presented. PET has a glass transition Biofuel: Definition, types, pros and cons, Acid rain: Causes, effects and solutions. Xometry makes no representation or warranty of any kind, be it expressed or implied, as to the accuracy, completeness, or validity of the information. Web6.6.2 Poly(ethylene Terephthalate)1-2 General Poly(ethylene terephthalate), or PET, is a thermoplastic polyester resin. A certain amount of extracted fractions can be combined with catalysts to produce plasticsthe process is called polymerization or polycondensation. The impact and tensile strengths of the blends were significantly reduced with the addition of PLA. The amorphous PET has better ductility but less stiffness and hardness. Film thickness: 0.012mm; test method: in-house method. Effect of gamma irradiation on haze of amorphous PET [23]. Plastic pollution leads to severe impact on marine ecosystems and can affect human health. Vinny R. Sastri, in Plastics in Medical Devices (Third Edition), 2022. The material is almost totally inert, therefore it is used in the most corrosive or aggressive environments at moderate temperatures. Growing demand for polyethylene terephthalate glycol from food packaging and Table 4.28. Polycarbonate VS Plastic Lenses | A Complete Analysis, What is Warpage? Webtended to reduce the weight of such composites, when being used as material for the construction of large buildings [3264]. By considering also the high recyclability of PET, and the possibility of potentially indefinitely re-use this material, one can assume that the future of PET is still to be written. Polytrimethylene terephthalate (PTT) production capacities 2019-2033 (According to DS/IEC 544-4). Depending on the chemical agents used to break down the polyester chain, depolymerization route can be classified: glycolysis, methanolysis, hydrolysis, etc. Super and subcritical fluids such as alcohol and water are exceptional media for carrying out decomposition of plastics. How Is Polyethylene Terephthalate Made? Polyethylene terephthalate is made from ethylene glycol. Ethylene glycol is usually called "MEG," standing for monoethylene glycol. PET is made from a combination of MEG and dimethyl terephthalate (DMT) (C6H4 (CO2CH3)2) but primarily terephthalic acid, also called "PTA" for purified terephthalic acid. PET materials come in a variety of shapes and colors which offer o good choice in producing attractive products. The semicrystalline PET has good strength, ductility, stiffness, and hardness.