Analysis of Commonly Used Food Packaging Materials: How to Choose Between CPP/PE Outer Film and OPP/PET/PA Inner Film?

In the global food packaging market, flexible plastic packaging accounts for over 58%, making it the most widely used packaging form for fruits, vegetables, and other food products. A proper combination of inner and outer film materials can enhance preservation and protection while also ensuring stable compatibility with export requirements.

As a food packaging manufacturer with 35 years of experience, we have long used a mature structure of CPP/PE for the outer film and OPP/PET/PA for the inner film. Combining industry data and production practice, we provide our clients with scientific material selection guidance.

I. Outer Film: CPP/PE – Basic Protection and Molding Stability

①PE: Excellent toughness and impact resistance, low-temperature resistance, and good sealing performance, suitable for cold chain fruit and vegetable and frozen food packaging, reducing transportation damage rates.

②CPP: High transparency and stable heat-sealing properties; food-grade CPP accounts for approximately 64% of the packaging industry, clearly displaying contents and enhancing product display.

The outer film primarily undertakes molding, sealing, and basic protection, balancing cost and practicality, making it the mainstream choice for export packaging.

II. Inner Film: OPP/PET/PA – Enhanced Functionality and Quality Assurance

①OPP: High rigidity, transparency, and moisture resistance; commonly used to improve packaging stiffness and appearance.

②PET: High mechanical strength and stable barrier properties; extends shelf life of food products; suitable for cooked foods, baked goods, and dry goods packaging.

③PA: Puncture-resistant and tensile-resistant; significantly reduces the breakage rate of fruits, vegetables, and hard foods during storage and transportation.

The inner film determines the functionality of the packaging; when laminated with the outer film, it achieves a comprehensive improvement in preservation, protection, and display.

III. Composite Material Selection Principles and Factory Practice

①Fruit and Vegetable Packaging: PE outer film + OPP/PET inner film is preferred, balancing breathability, moisture resistance, and impact resistance.

②Food Packaging: Based on shelf life and storage/transportation conditions, CPP+PET/PA structure is selected to enhance barrier properties and puncture resistance.

③Export Compatibility: Food-grade raw materials and standardized production are used throughout the entire process to ensure compliance with international market safety and hygiene requirements.

Our factory, leveraging 35 years of accumulated expertise, provides customized fruit and vegetable packaging bags and food packaging bags to global clients. We optimize material combinations and structural designs according to product characteristics, offering stable quality and highly adaptable solutions to help clients enhance their competitiveness in ove