Polyethylene terephthalate—PET for short—is everywhere. It’s in the water bottle on your desk, the polyester shirt on your back, and the food tray in your fridge. We supply PET resin materials to manufacturers across 200+ countries, and we’ve seen firsthand how this one polymer keeps finding its way into new products, new industries, and new conversations about sustainability.
What Is Polyethylene Terephthalate (PET)?
Polyethylene terephthalate is a semi-crystalline thermoplastic polymer that belongs to the polyester family. PET (or PETE) is a general-purpose linear semicrystalline thermoplastic polymer that belongs to the polyester family of polymers. In plain terms, it’s a type of plastic made by combining two chemical building blocks—ethylene glycol and terephthalic acid—under heat and pressure. The basic building blocks of PET are ethylene glycol and terephthalic acid, which are combined to form a polymer chain, and the resulting spaghetti-like strands of PET are extruded, quickly cooled, and cut into small pellets. Those tiny pellets then get shipped to factories where they’re melted and shaped into bottles, containers, fibers, films, and a lot more.
When PET is used for clothing and fabric, people usually call it “polyester.” In the context of textile applications, PET is referred to by its common name, polyester, whereas the acronym PET is generally used in relation to packaging. Same material, different name depending on the end use. That’s already a sign of how flexible this polymer is. And it’s not niche—polyethylene terephthalate is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, and thermoformed parts for manufacturing.
The global PET market tells the story of just how big this material has gotten. The global polyethylene terephthalate (PET) plastic resin market size was valued at US$ 64,893.4 million in 2025 and is estimated to grow at a compound annual growth rate (CAGR) of 5.6% from 2025 to 2033. In 2025, annual global production of PET was 31 million tons with 2031 projections showing over 40 million tons. As a thermoplastic resin supplier, we see that demand accelerating across both traditional packaging markets and newer sectors like electronics and automotive. It’s safe to say PET isn’t going anywhere—except into more products.
Key Properties of PET Plastic
PET stands out because it packs a lot of performance into a lightweight package. Polyethylene terephthalate is highly flexible, colorless and semi-crystalline resin in its natural state. Depending upon how it is processed, it can be semi-rigid to rigid. It shows good dimensional stability, resistance to impact, moisture, alcohols and solvents. That combination of clarity, toughness, and chemical resistance is hard to beat at this price point—and it’s why PET keeps winning against alternatives like glass and aluminum in packaging.
One of PET’s biggest selling points is its barrier performance. PET has excellent barrier properties against gases, moisture, and aroma. PET films and containers act as effective barriers, protecting products from oxygen, water vapor, and external odors. This property makes it ideal for packaging applications, particularly in the food and beverage industry, where it helps extend the shelf life of products and maintains their freshness.It also delivers strong electrical insulating properties, which is why you’ll find PET film inside capacitors, cables, and other electronic components. And then there’s its safety profile: it is approved as safe for contact with foods and beverages by the FDA, Health Canada, EFSA & other health agencies.
Here’s a quick snapshot of PET’s typical physical and mechanical properties that we reference when helping customers select grades:
| Property | Typical Value | Unit |
|---|---|---|
| Melting Point | 250–260 | °C |
| Glass Transition Temperature (Tg) | 70–80 | °C |
| Ultimate Tensile Strength | 60–150 | MPa |
| Yield Strength | ~40 | MPa |
| Elastic (Young’s) Modulus | 3.5–11 | GPa |
| Density | 1.33–1.40 | g/cm³ |
| Thermal Conductivity | 0.15–0.4 | W/(m·K) |
| Elongation at Break | 2.5–70 | % |
| Resin Identification Code | #1 (♳) | — |
Sources for this data come from published engineering databases and technical handsheets. PET’s glass transition point (Tg) is typically between 70°C and 80°C. Its melting point (Tm) is typically between 250°C and 260°C, which allows for processing by melt extrusion and injection molding. Elastic (Young’s, Tensile) Modulus ranges from 3.5 to 11 GPa, with Ultimate Tensile Strength from 60 to 140 MPa. These numbers shift depending on whether you’re working with unfilled, glass-fiber-reinforced, or carbon-fiber-reinforced PET—so always match the grade to your process.
How PET Resin Is Made
PET production starts with two raw materials: purified terephthalic acid (PTA) and mono-ethylene glycol (MEG). MEG usually comes from natural gas, and PTA from p-xylene that’s made from crude oil. It can also be made another way, by using MEG and dimethyl terephthalate (DMT). In the PET-making process, a catalyst (usually an antimony or titanium compound) and a stabilizer (phosphite) are added. The two monomers react through a polycondensation process, building long molecular chains that give PET its strength and flexibility. Once the reaction finishes, the molten polymer gets extruded into strands, cooled, and chopped into small resin pellets—those are what we ship to our customers worldwide.
From that pellet stage, PET can go in many directions. The reaction produces PET in the form of a molten and viscous mass, which can be directly spun into fibers or extruded or molded into almost any shape. For bottle production, the pellets go through solid-state polymerization (SSP) first to boost their intrinsic viscosity—that’s what gives bottle walls the strength to hold carbonated drinks under pressure. For fiber production, the pellets get melted and pushed through spinnerets to create thin filaments. For sheet and film, they get extruded flat and can be biaxially oriented for extra strength and clarity. The processing route you pick depends entirely on what you’re making, and that flexibility is part of what makes PET so popular across so many industries. If you work with other thermoplastics alongside PET, you might also explore how polypropylene (PP) resin compares for certain packaging and automotive applications.
Applications of PET Across Industries
PET’s biggest market is packaging, and it’s not even close. Packaging applications constituted 96.10% of demand in 2025, reflecting PET’s optimization for beverage, food, and personal-care containers. PET containers are popular for packaging sodas, water, juices, salad dressings, cooking oil, peanut butter, shampoo, liquid hand soap, mouthwash, pharmaceuticals, even tennis balls. Virtually all single-serving and 2-liter bottles of carbonated soft drinks and water sold in the U.S. are made from PET. That dominance comes down to a few things: PET is lighter than glass (which cuts shipping costs), shatterproof (which reduces product loss), and clear enough to show off what’s inside.
But PET does a lot more than hold your drinks. Including the >60% fraction of polyethylene terephthalate produced for use as polyester fibers, PET is the fourth-most-produced polymer after polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC). In textiles, PET fibers show up in everything from athletic wear and work uniforms to carpets and upholstery. The stiffness of PET fibres makes them highly resistant to deformation, so they impart excellent resistance to wrinkling in fabrics. They are often used in durable-press blends with other fibres such as rayon, wool, and cotton. In the auto industry, automakers specify PET yarns for seat belts and airbag fabrics. And in electronics, PET has a wide range of applications in the electrical industry—due to its good dielectric properties and thermal stability, PET films are often used as insulation material in capacitors, transformers, and cables.
The medical sector is another growth area. Special grades of Polyethylene Terephthalate (medical-grade PET or PETG) are used in medical applications (sterilized containers and medical packaging), where strength and chemical resistance are required. PET’s resistance to chemicals and its ability to withstand sterilization processes make it suitable for products that come into direct contact with patients. PET is used for medical packaging (vials, trays, and blister packs), where maintaining the sterility of the contents is essential. 3D printing has also opened new doors—PET works as a 3D printing filament, as well as in the 3D printing plastic PETG, which has become a popular material used for high-end applications like surgical fracture tables. We continue to see new applications pop up as manufacturers realize they can get strong performance from PET at a lower cost than engineering plastics.
PET Recycling and Sustainability
Here’s a number that matters: PET is the most widely recycled plastic in the world, and a new PET container can be produced with 100% recycled PET. That’s a big deal. Unlike many other plastics, PET can go through the recycling loop multiple times without losing its core performance. PET can be recovered, and the material reused, through a series of special washing processes or by a chemical treatment to break down the PET into its raw materials or intermediates, which are then purified and converted into new PET resin.
The recycling infrastructure for PET is well established. Virtually every municipal recycling program in North America and Europe accepts PET bottles and containers. Bottles, jars and other containers made of PET can be collected and recycled into a wealth of products. PET can be recycled into new PET bottles and containers, carpet and clothing, industrial strapping, rope, upholstery fabrics, boat sails, automotive parts, fiberfill for winter jackets and sleeping bags, construction materials, and many other items. In the U.S., the current recycling rate for PET is 31%, and this figure continues to grow, but notably lags behind Europe, which has a PET recycling rate of 52%. The EU recorded a PET bottle recycling rate of 75% in 2024, driving domestic rPET demand above global norms. Those numbers are pushing more brands and manufacturers to adopt recycled PET (rPET) in their products.
On the safety front, PET checks the boxes that matter most to brands and consumers. PET does not contain bisphenol-A (BPA) or phthalates (plasticizers). PET contains no phthalates. Phthalates (i.e., phthalate ester plasticizers) are not used in PET, and PET is not a phthalate. Plasticizer phthalates are sometimes used to soften other types of plastic, but they are not used in PET. And when PET bottles do end up in landfills instead of recycling bins, PET bottles and containers that find their way to the landfill pose no risk of harm or leaching, since the polymer is inert, resistant to attack by micro-organisms, and won’t biologically degrade. We supply both virgin and rPET grades at CBRHK, and we’re seeing more customers set recycled-content targets as part of their sustainability commitments. The trend toward circular packaging is real—and PET is the material best positioned to deliver on it.
FAQs
Is PET plastic safe for food and drinks?
Yes. PET is approved as safe for contact with foods and beverages by the FDA and health-safety agencies throughout the world. It doesn’t contain BPA or phthalate plasticizers. PET contains no known endocrine disruptors, and there is no credible scientific data to suggest that PET produces estrogen or endocrine modulating activity. For food-contact applications, always request FDA compliance certificates (21 CFR) or EU Regulation 10/2011 documentation from your supplier.
What’s the difference between PET and PETE?
Nothing—they’re the same material. PET (also abbreviated PETE) is short for polyethylene terephthalate, the chemical name for polyester. You’ll see “PET” used more often in industry and packaging contexts, while “PETE” sometimes shows up on recycling labels. PET containers are typically molded on the bottom or side with the number 1 surrounded by the triangular “chasing arrows” symbol and the acronym PET or PETE below the triangle. Only PET carries the #1 identification code.
Can PET be recycled more than once?
Yes. PET is the most widely recycled plastic in the world, and a new PET container can be produced with 100% recycled PET. PET can also be recycled again and again.Mechanical recycling (wash, shred, remelt) and chemical recycling (break the polymer back down to its monomers) both work for PET. Chemical recycling, in particular, produces rPET that’s nearly identical to virgin resin in quality.
What is the melting point of polyethylene terephthalate?
The melting point of PET generally ranges between 250°C and 260°C. The exact number depends on the grade, crystallinity level, and any copolymer modifications. The glass transition temperature sits around 70–80°C, which is the point where PET shifts from a rigid, glassy state to a more rubbery one. Both numbers matter when you’re dialing in processing parameters for injection molding, blow molding, or extrusion.
Does PET degrade in sunlight?
PET can degrade with prolonged UV exposure if it’s not properly stabilized. For outdoor or long-term-exposure applications, manufacturers add UV stabilizers and antioxidants during compounding. Indoor applications like packaging and consumer goods don’t have this problem. If you’re planning outdoor use—say construction glazing or signage—talk to your supplier about UV-stabilized PET grades that are formulated for extended weathering.