Overview

PET (Polyethylene Terephthalate) film is a high-performance rigid flexible packaging substrate, serving as one of the four core packaging base materials alongside PE, PP and PA films. Manufactured from premium polyester resin via professional extrusion and film-forming processes, it is widely recognized in the global packaging industry for its exceptional rigidity, high transparency, superior barrier performance and stable printability. As an indispensable outer-layer material for composite packaging structures, PET film perfectly complements heat-sealable inner-layer films, meeting the high-standard demands of export food, daily chemical, industrial and electronic packaging fields.

1. Core Properties of PET Film

PET film features stable physical, mechanical and chemical properties, with unique advantages that distinguish it from PE and PP packaging films:

• High rigidity and tensile strength: PET film boasts excellent mechanical toughness, resisting stretching, puncture and deformation. It maintains stable structural performance during high-speed lamination, bag making and long-distance logistics transportation, effectively improving finished packaging durability.
• Superior barrier performance: It provides outstanding resistance to oxygen, grease, moisture and peculiar smell. This core property greatly extends the shelf life of oily food, snacks, seasonings and daily chemical products, making it ideal for long-term storage packaging.
• Excellent printing and lamination adaptability: With a smooth, flat surface and stable surface tension after corona treatment, PET film supports high-definition gravure and color printing. It fits perfectly with dry and extrusion lamination processes, delivering bright, clear and fade-resistant packaging patterns for brand presentation.
• Good high-temperature resistance: Compared with PE and PP films, PET features stable heat resistance, tolerating high-temperature lamination and food sterilization processes. It is applicable for retort packaging and heat-treated product packaging without deformation or performance degradation.
• Strict safety and environmental compliance: Our PET film adopts food-grade raw materials, non-toxic, odorless and chemically inert. It fully complies with EU, FDA, Southeast Asia and other international food contact standards, suitable for global export packaging scenarios.

2. Main Functions & Packaging Positioning

In the four mainstream packaging substrates (PE/PP/PET/PA), PET film is professionally positioned as the high-performance outer layer of composite packaging. It does not support heat sealing independently, so it is always matched with heat-sealable inner-layer films such as PE film to form classic composite packaging structures.

• PET + PE Structure: The most universal and cost-effective composite solution, balancing high barrier, beautiful printing and reliable heat sealing, suitable for most food and daily chemical packaging.
• PET Functional Lamination: Matched with modified functional films to achieve anti-oxidation, oil-proof and fresh-keeping effects, meeting high-end customized packaging needs.

With its excellent comprehensive performance, PET film makes up for the insufficient barrier and rigidity of PE and PP films, becoming the preferred outer-layer material for medium and high-end export flexible packaging.

3. Typical Application Scenarios

PET film is widely used in packaging products requiring high barrier, high printing quality and long shelf life:

• Food packaging: Oily snacks, nuts, baked goods, vacuum food, retort food and seasoning powder packaging
• Daily chemical packaging: Detergent pouches, shampoo refill bags and skincare product outer packaging
• Industrial packaging: Electronic component anti-oxidation packaging, hardware dust-proof packaging and high-barrier industrial wrapping
• Brand export packaging: Custom printed composite packaging for cross-border brands with high appearance and quality requirements

4. Our PET Film Advantages

We supply standard and printing-grade PET films dedicated to flexible lamination packaging. All our products feature uniform thickness, stable surface tension and excellent lamination compatibility, effectively avoiding common processing problems such as blurry printing, delamination and bubble formation.

Complementary to our full-series PE functional films, we provide customers with matched PET+PE composite packaging material solutions. We support customized specifications and surface treatment to adapt to different international market standards and customer processing requirements.

Contact us for free PET film samples, technical parameters and customized packaging material solutions.