Our PET Injection Molding Capabilities
From crystal-clear beverage bottles to precision medical trays, our PET injection molding service delivers quality, safety, and speed.
Product Design Support
- Optimized design for clarity and wall thickness consistency
- Integration of tamper-evident and sealing features for packaging
- Engineering for dimensional stability under thermal load
Mold Design & Manufacturing
- High-polish molds for glass-like transparency
- Cooling channel design for cycle time efficiency
- Mold surface treatments to reduce sticking and improve part release
Plastic Injection Molding
- Processing with moisture-controlled PET resin for quality assurance
- Capable of high-speed preform production for blow molding
- Tight tolerance control for medical and industrial parts
Post-processing & Assembly
- CNC trimming and finishing for precision fit
- Printing, labeling, and decorative surface treatments
- Assembly of closures, seals, and secondary components
What is PET – Polyethylene Terephthalate
Polyethylene Terephthalate (PET) is a semi-crystalline thermoplastic widely known for its excellent mechanical strength, chemical resistance, and dimensional stability. PET is commonly used in packaging (bottles, films), automotive components, electrical connectors, and industrial machinery. It has good wear resistance, low moisture absorption, and maintains stability over a wide temperature range. PET can be processed through injection molding or CNC machining, with careful control of drying, temperature, and mold design to ensure high-quality parts.
| Property | Typical Value / Description | Notes |
|---|---|---|
| Tensile Strength | 55–75 MPa | Strong and suitable for load-bearing components |
| Flexural Strength | 90–110 MPa | Provides rigidity and structural stability |
| Impact Strength (Notched/Unnotched) | 40–60 J/m | Good toughness; amorphous or reinforced grades improve impact resistance |
| Elastic Modulus | 2.5–2.8 GPa | Stiff material with good dimensional stability |
| Heat Deflection Temperature | 70–150°C | Varies with crystallinity and grade; suitable for moderate to high temperatures |
| Density | 1.38 g/cm³ | Moderate density; stable under load |
| Chemical Resistance | Excellent; resists water, many oils, and mild acids/bases | Sensitive to strong acids, strong bases, and oxidizers |
| Water Absorption | 0.2–0.5% | Low; ensures dimensional stability |
| Shrinkage | 0.4–0.7% | Must be considered in mold design for accurate tolerances |
| Flammability | UL94 V-0 | Good flame resistance |
Common Applications of PET Molded Parts
| Industry | Example Parts | Why PET Works Well |
|---|---|---|
| Food & Beverage | Water bottles, jars, preforms | FDA-approved, crystal clear, moisture barrier |
| Medical | Test tubes, blister packs, trays | Sterilizable, chemical resistance |
| Cosmetics | Lotion bottles, cosmetic jars | High clarity, scratch resistance |
| Industrial | Electrical housings, protective covers | Strength, dimensional stability |
Production & Delivery Solutions
| Solution Type | Best For | Typical Lead Time | Notes |
|---|---|---|---|
| Rapid Prototyping | Functional and visual PET samples | 7–10 days | Supports market testing and validation |
| Small Batch | Specialty PET products | 2–3 weeks | Flexible in color and additive selection |
| Mass Production | High-volume bottles, trays, and packs | 4–6 weeks | Cost-effective, consistent quality |
| Export Molds | Overseas PET molding | 5–7 weeks | Precision tooling for long-term production |
PET Injection Molding FAQs
PET offers high clarity, strength, and excellent moisture/gas barrier properties, meeting global food safety standards.
Yes, heat-set PET grades can withstand higher filling temperatures without deformation.
Yes, PET is widely recycled and labeled with recycling code #1.
PET offers excellent clarity similar to PMMA, but with better impact resistance and barrier properties, though slightly lower heat resistance than PC.
Yes, PET can be sterilized using various methods, making it suitable for medical and laboratory use.
