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Send EmailPolyethylene Terephthalate Glycol, Glycol-modified PET, PET-G, Copolyester PETG, PETG, 25640-60-0
PETG (Polyethylene Terephthalate Glycol-Modified)
| Parameter | Description |
|---|---|
| Product Name | PETG (Polyethylene Terephthalate Glycol-Modified) |
| Chemical Name | Poly(ethylene terephthalate-co-ethylene glycol) |
| CAS Number | 25640-60-0 |
| Polymer Type | Amorphous, thermoplastic copolyester |
| Abbreviation | PETG |
| Other Names | Glycol-modified PET, PET-G, Copolyester PETG |
| REACH Status | Registered |
| Food Contact | Suitable in appropriate grades |
| Recycling Code | Can be collected separately as PETG; depends on regional regulations |
| Property | Value |
|---|---|
| Appearance | Transparent, glass-like |
| Color | Colorless or slightly blue-tinted transparent |
| Density | 1.27–1.33 g/cm³ |
| Melting Point (Tm) | No distinct melting point due to amorphous structure |
| Glass Transition Temperature (Tg) | 80 °C |
| Heat Deflection Temperature (1.82 MPa) | 65–70 °C |
| Intrinsic Viscosity (IV) | 0.65–0.85 dL/g |
| Moisture Absorption Tendency | Moderate; drying required before processing |
| Odor | Odorless |
| Surface | Glossy, smooth |
| Crystalline Structure | Amorphous |
| Property | Value |
|---|---|
| Tensile Strength | 45–55 MPa |
| Tensile Modulus | 2.0–2.5 GPa |
| Elongation at Break | 100–300% |
| Impact Strength (Izod) | 80–120 J/m |
| Hardness (Rockwell) | R 95–105 |
| Flexural Strength | 60–75 MPa (typical) |
| Flexural Modulus | 2.0–2.4 GPa (typical) |
| Coefficient of Friction | Low–moderate |
| Abrasion Resistance | Moderate |
| Notched Impact Strength | High |
| Property | Value |
|---|---|
| Glass Transition Temperature (Tg) | 80 °C |
| Coefficient of Thermal Expansion | 6–8 × 10⁻⁵ /°C |
| Thermal Conductivity | 0.20 W/mK |
| Heat Deflection Temperature (0.45 MPa) | 70–75 °C (typical) |
| Heat Deflection Temperature (1.82 MPa) | 65–70 °C |
| Melting Temperature | Not distinct |
| Specific Heat | 1.1–1.3 J/gK (typical) |
| Thermal Stability | Decomposition may begin above 250 °C |
| Property | Value |
|---|---|
| Volume Resistivity | 10¹⁵–10¹⁶ Ω·cm |
| Surface Resistivity | 10¹⁴–10¹⁶ Ω |
| Dielectric Constant (1 MHz) | 2.8–3.2 |
| Dielectric Loss (1 MHz) | 0.02–0.03 |
| Dielectric Strength | 15–20 kV/mm |
| Electrical Insulation | Good |
| Property | Value |
|---|---|
| Transparency | High |
| Light Transmission | 85–90% (typical) |
| Haze | Low |
| Gloss | High |
| UV Resistance | Moderate; may require UV stabilizer |
| Yellowing Tendency | Tends to yellow under UV light |
| Medium | Resistance |
|---|---|
| Water | Excellent resistance |
| Acids | Good against dilute acids, poor against strong acids |
| Bases | Poor against strong bases |
| Organic Solvents | Resistant to aliphatics, swelling may occur in aromatics |
| Alcohols and Oils | Excellent resistance |
| Ketones | Limited resistance |
| Esters | Limited resistance |
| Hydrocarbons | Good against aliphatics, limited against aromatics |
| Property | Value |
|---|---|
| Water Vapor Permeability | Moderate–good |
| Oxygen Barrier | Lower than PET |
| Carbon Dioxide Barrier | Moderate |
| Aroma Barrier | Good |
| Moisture Barrier | Good |
| Food Contact | Suitable in appropriate grades |
| Method | Temperature / Condition |
|---|---|
| Injection Molding | 230–250 °C |
| Extrusion | 230–250 °C |
| 3D Printing (Filament) | 220–250 °C |
| Drying | 65–70 °C for 4–6 hours |
| Moisture Content | ≤ 0.02% |
| Mold Temperature | 15–40 °C (typical) |
| Screw Speed | Moderate |
| Back Pressure | Low–moderate |
| Property | Value |
|---|---|
| Melt Flow Index (MFI) | 10–30 g/10 min (typical) |
| Melt Density | 1.15–1.20 g/cm³ |
| Melt Viscosity | Moderate |
| Shear Thinning | Yes |
| Flowability | Good |
| Mold Filling | Easy |
| Parameter | Value |
|---|---|
| Moisture Absorption Tendency | Moderate |
| Recommended Drying Temperature | 65–70 °C |
| Drying Time | 4–6 hours |
| Target Moisture | ≤ 0.02% |
| Drying Equipment | Hot air dryer, desiccant dryer |
| Over-drying | May cause yellowing and degradation |
| Field | Applications |
|---|---|
| Packaging | Transparent food containers, blister packaging |
| Medical | Single-use devices, sterile packaging |
| 3D Printing | Filament production, prototype parts |
| Electronics | Transparent housings, protective parts |
| Cosmetics | Transparent packaging, dispenser parts |
| Automotive | Interior lighting parts, transparent panels |
| Household Goods | Transparent storage containers, display products |
Advantages:
High impact resistance
Easy processability, especially for 3D printing
Transparency and aesthetic appearance
Suitable for food contact in appropriate grades
Good chemical resistance
Low shrinkage
Disadvantages:
Lower heat resistance compared to PET
Tendency to yellow under UV light
Poor resistance to strong bases
Swelling in aromatic solvents
Risk of degradation at high temperatures
| Property / Material | PETG | PET Resin | PTA (Terephthalic Acid) |
|---|---|---|---|
| Type | Amorphous copolyester | Semi-crystalline polyester | Aromatic diacid (monomer) |
| Appearance | Transparent, impact-resistant | Transparent–opaque, hard | White crystalline powder |
| Density (g/cm³) | 1.27–1.33 | 1.33–1.38 | 1.51 |
| Tg (°C) | ~80 | 75–80 | — |
| Melting Point (°C) | Not distinct | 250–260 | 300 |
| Tensile Strength (MPa) | 45–55 | 50–70 | — |
| Impact Strength | Very high | Moderate | — |
| Processability | Easy, low temperature | High temperature, drying required | Monomer, raw material for polymerization |
| Applications | 3D printing, packaging, medical | Bottles, textiles, automotive | Raw material in PET production |
| Parameter | Information |
|---|---|
| Storage Conditions | Cool, dry, well-ventilated area |
| Temperature | 15–30 °C |
| Humidity | Low humidity; keep packaging closed |
| Sunlight | Protect from direct sunlight |
| Packaging | 25 kg bag, 500 kg big bag, 1000 kg big bag |
| Custom Packaging | Upon request |
| Shelf Life | 24 months (under proper storage) |
| Hygroscopicity | Moderate; protect from moisture |
| Parameter | Value |
|---|---|
| GHS Classification | Not classified as a hazardous substance |
| Oral LD50 | > 5000 mg/kg (estimated) |
| Skin Irritation | Mechanical irritation possible |
| Eye Irritation | Dust/fragments may cause mechanical irritation |
| Respiratory Irritation | Dust inhalation may cause irritation |
| Mutagenicity | Not classified |
| Carcinogenicity | Not classified |
| Bioaccumulation | Not likely |
| WGK Germany | 1 (slightly hazardous to water) |
| Parameter | Information |
|---|---|
| Recycling | Mechanical recycling is suitable |
| Energy Recovery | Suitable |
| Biodegradability | Not biodegradable |
| Environmental Impact | Low; proper disposal required |
| Recycling Code | Can be collected separately as PETG |
| Reprocessing | Can be reprocessed a limited number of times |
| Region / Authority | Status |
|---|---|
| EU | REACH registered |
| USA | TSCA listed |
| Food Contact | FDA and EU 10/2011 compliant grades |
| Medical | USP Class VI compliant grades |
| Turkey | Should be evaluated under KKDİK |
| RoHS | Compliant |
| REACH SVHC | Does not contain (typical grades) |
| Parameter | Information |
|---|---|
| UN Number | Not applicable |
| Hazard Class | Not a hazardous substance |
| Packing Group | Not applicable |
| Proper Shipping Name | PETG |
| Marine Pollutant | No |
| ADR/RID Label | Not applicable |
| Transport Conditions | Protect from moisture and direct sunlight |
| Problem | Possible Cause | Solution |
|---|---|---|
| Yellowing | Excessive temperature, moisture | Lower temperature, dry properly |
| Brittleness | Moisture, over-drying | Optimize drying conditions |
| Surface streaks | Moisture, mold temperature | Control moisture, adjust mold temperature |
| Sticking | Excessive heat | Lower temperature |
| Loss of transparency | Crystallization, moisture | Maintain amorphous structure, dry |
| Flow marks | Low temperature | Increase temperature |
| Voids | Moisture, low pressure | Dry, increase injection pressure |
| Parameter | Specification |
|---|---|
| Appearance | Transparent, homogeneous |
| Color | Colorless–slightly blue |
| Density | 1.27–1.33 g/cm³ |
| Intrinsic Viscosity | 0.65–0.85 dL/g |
| Moisture | ≤ 0.02% |
| Melt Flow Index | 10–30 g/10 min |
| Tensile Strength | 45–55 MPa |
| Impact Strength | 80–120 J/m |
| Tg | 80 °C |
| Foreign Matter | No visible foreign matter |
SUMMARY:
PETG is an amorphous copolyester version of PET modified with glycol. It is a transparent thermoplastic with high impact resistance and easy processability. It is widely used in 3D printing, packaging, medical, electronics, and cosmetic applications. It has lower heat resistance compared to PET and may tend to yellow under UV light. It is poor against strong bases. Drying before processing is critical.
Key Properties:
| Property | Value |
|---|---|
| Appearance | Transparent, glass-like |
| Chemical Structure | Amorphous copolyester |
| Density | 1.27–1.33 g/cm³ |
| Tg | 80 °C |
| Melting Point | Not distinct |
| Tensile Strength | 45–55 MPa |
| Impact Strength | 80–120 J/m |
| Processing Temperature | 230–250 °C |
| Drying | 65–70 °C, 4–6 hours |
| Moisture | ≤ 0.02% |
Main Applications:
| Industry | Applications |
|---|---|
| Packaging | Food containers, blister packaging |
| Medical | Single-use devices, sterile packaging |
| 3D Printing | Filament, prototypes |
| Electronics | Transparent housings |
| Cosmetics | Transparent packaging |
| Automotive | Interior lighting parts |
Key Safety Points:
LOW TOXICITY: Not a hazardous substance.
MECHANICAL IRRITATION: Dust and fragments may cause mechanical irritation.
DUST CONTROL: Inhalation of dust should be avoided.
STORAGE: Cool, dry, well-ventilated area.
MOISTURE CONTROL: Must be dried before processing.
UV PROTECTION: Protect from direct sunlight.
CRITICAL WARNINGS:
PETG has an amorphous structure; it does not exhibit a distinct melting point.
It stands out with high impact resistance and transparency.
It has lower heat resistance compared to PET.
Due to its tendency to yellow under UV light, UV stabilizers may be used.
It is poor against strong bases; care should be taken when selecting cleaning agents.
Swelling may occur in aromatic solvents.
Before processing, it must be dried to a moisture content of ≤ 0.02%.
In 3D printing, a nozzle temperature of 220–250 °C is typical.
Food contact grades must be selected for food contact applications.
It is recyclable; regional regulations must be followed.
Important Statement: This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on available data and is believed to be accurate. However, the user is solely responsible for determining the suitability of the product for their own specific applications and for complying with all applicable regulations and safety requirements. For complete safety, use, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Users are obligated to test the product in their own processes and applications. All local, national, and international regulations must be followed when working with PETG.