I. Basic Product Information
This packaging bag, composed of Polyethylene Terephthalate Film (PET), Biaxially Oriented Polypropylene Film (BOPP), Aluminum Foil (AL), Nylon Film (PA), Polyethylene Film (PE), and Cast Polypropylene Film (CPP), presents a multi - functional packaging solution. It is well - suited for a vast array of products, ranging from food items with strict preservation demands to industrial goods needing reliable protection. Tailored to meet high - level requirements in barrier properties, mechanical strength, and adaptability to diverse environments, it ensures optimal protection, freshness maintenance, and usability for products such as high - end snacks, cooked meats, precision electronic components, and more.
II. Product Structure
It features a multi - layer composite structure of PET/BOPP/AL/PA/PE/CPP. By integrating the distinctive advantages of each material, this structure achieves superior overall performance. The layered design ensures a balanced functionality, combining strong mechanical strength, excellent barrier effects, reliable heat - sealing capability, and the ability to adapt to various processing, storage, and transportation conditions.
III. Raw Material Characteristics
(I) PET Film (Often as the Outermost Layer for Printing)
PET film is produced via biaxial stretching. It offers exceptional mechanical strength, including high tensile resistance and puncture resistance, which safeguards the packaging from damage during transportation and handling. It boasts remarkable dimensional stability, resisting deformation even when exposed to temperature fluctuations. With high transparency, it allows clear visibility of the contents. Moreover, its smooth surface is perfect for high - quality printing, ensuring vivid and long - lasting graphics and product information.
(II) BOPP Film (Optional Outer Layer, Adding Gloss and Printability)
BOPP film, made through biaxial orientation of polypropylene, has high transparency and glossiness, enhancing the packaging's visual appeal. It also has good stiffness, contributing to the package's shape retention. Similar to PET, it provides a smooth surface for printing, enabling the display of detailed and colorful product information. However, compared to PET, it has relatively lower moisture resistance.
(III) AL (Aluminum Foil, Key Barrier Layer)
Aluminum foil is a crucial barrier layer. It effectively blocks oxygen, moisture, light, and odors, significantly retarding the oxidation, spoilage, and flavor deterioration of the contents. It also offers excellent light - shielding properties, protecting light - sensitive products. Its high thermal conductivity can be beneficial in processes like heat sterilization, yet it is relatively brittle and requires support from other films in the composite structure.
(IV) PA Film (Nylon Film, Enhancing Toughness and Barrier)
PA (Nylon) film is renowned for its outstanding flexibility and impact resistance, which enhances the packaging's toughness, making it resistant to tearing and cracking under external pressure. It also improves the barrier properties against oxygen and carbon dioxide, slowing down the oxidation process of perishable contents. Its chemical resistance ensures compatibility with various food ingredients, including acidic or oily substances.
(V) PE Film (Polyethylene Film, Bonding and Moisture - resistant Layer)
PE (Polyethylene) film serves as an intermediate bonding and buffer layer, enhancing the flexibility of the composite structure and the adhesion between layers. It provides additional moisture resistance, preventing water vapor from penetrating the packaging. It also acts as a transition layer to ensure compatibility between the relatively rigid layers (such as PET, BOPP, AL) and the heat - sealable CPP layer.
(VI) CPP Film (Cast Polypropylene Film, Innermost Heat - seal Layer)
CPP (Cast Polypropylene) film, as the innermost layer, offers excellent heat - sealing performance, enabling strong and reliable seals even at moderate temperatures to prevent leakage. It is non - toxic, odorless, and compliant with food contact standards, ensuring safety for direct contact with edible products. Its heat resistance allows the packaging to withstand short - term high - temperature processes such as pasteurization, making it suitable for pre - cooked or ready - to - eat items.
IV. Manufacturing Process
(I) Dry Lamination
The layers are bonded using dry lamination. Solvent - based or water - based adhesives (typically polyurethane) are applied to the surface of the films, followed by drying to remove solvents. Then, the films are pressed together under controlled temperature and pressure to form a strong and uniform bond. This process ensures high adhesion between layers, preventing delamination even under harsh conditions.
(II) High - Precision Gravure Printing
Printing is usually carried out on the outer PET or BOPP layer using gravure printing. This method utilizes engraved cylinders to transfer ink onto the film, delivering sharp, high - resolution images, vibrant colors, and consistent quality. It makes the packaging visually appealing and effective for brand promotion and product information display.
V. Product Advantages
(I) Superior Barrier Properties
The combination of PET, BOPP, AL, PA, PE, and CPP creates a multi - layer barrier. It effectively blocks oxygen, moisture, light, and odors, significantly extending the shelf life of contents. This is especially ideal for perishable foods, high - end snacks, and items sensitive to environmental factors.
(II) Exceptional Durability and Flexibility
PET, BOPP, and AL provide robust mechanical strength, while PA, PE, and CPP enhance flexibility. This makes the packaging resistant to punctures, tears, and impacts during handling, transportation, and storage.
(III) Versatile Heat Resistance
The CPP innermost layer enables the packaging to withstand moderate high temperatures (up to 121°C for short periods), supporting processes like pasteurization or hot filling. This expands its applicability to pre - cooked and ready - to - eat products.
(IV) Safe and Food - Compliant
All materials (PET, BOPP, AL, PA, PE, CPP) meet international food contact safety standards, ensuring non - toxicity and compatibility with a wide range of food types, including acidic, oily, and fatty products.
VI. Application Scenarios
This packaging is highly versatile and suitable for:
- Food products: High - end snacks (like dried fruits, nuts), cooked meats (such as ham, bacon), sauces (including ketchup, soy sauce), pre - cooked meals (like stir - fries, soups), and dairy products.
- Industrial items: Precision electronic components, small mechanical parts, and medical supplies requiring moisture, dust, and light protection.
- It is widely used in retail channels such as supermarkets, convenience stores, and e - commerce platforms, adapting to both shelf display and logistics transportation needs.
VII. Customization Services
To cater to personalized requirements, we offer comprehensive customization options:
- Printing: Custom brand logos, product descriptions, nutritional information, and promotional graphics can be printed on the outer PET or BOPP layer.
- Dimensions and Shapes: Tailored sizes (from small sachets to large pouches) and forms (stand - up pouches, flat bags, with or without zippers/spouts) are available to fit specific products.
- Performance Adjustments: Modifications to layer thicknesses or material grades can be made to enhance barrier properties, heat resistance, or flexibility based on unique product needs.
These services help strengthen brand identity, improve user experience, and meet diverse packaging demands.
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