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INTRODUCTION

Composite packaging, is one of the modern and effective packaging solutions that optimally protects products while enhancing brand value. With a unique structure formed from multiple layers of different materials, composite packaging offers the perfect combination of protection, aesthetics, and convenience. It is becoming an increasingly popular choice across various industries, from food and pharmaceuticals to cosmetics and consumer products.

Composite packaging is constructed by combining multiple layers of materials such as PE (Polyethylene), PET (Polyester), CPP (Cast Polypropylene), BOPP (Biaxially Oriented Polypropylene), Aluminum Foil, PA (Nylon), MPET (Metallized Polyester), MOPP (Metalized Oriented Polypropylene), and more. Each layer has its own distinct properties, providing superior benefits for product protection and quality maintenance. This combination enables the packaging to have excellent moisture, oxidation, light, and heat resistance.

Currently, depending on the purposes and price range, there are many types of combination, typically composed of 2-3 layers, including:

Outside Layer

Inner Layer

Second Inner layer

Characteristics & Applications
OPP

PE

  

While OPP outer layer provides good printability and aesthetic, This combination usually offers higher PE content, making the bags thicker and more suitable for dry food, biscuits, and instant noodles

PA

 PE  

PA provides good strength and durability，PE inner layer offers flexibility and softness， suitable for packaging rice, fertilizers, cement, and animal feed
OPP MCPP  

MCPP inner layer prevent oxidation, block UV and Light and more cost effective than Aluminum Foil, ideal for tea bags, coffee bags, snacks, and peanuts
OPP CPP PE

MCPP inner layer prevent oxidation, block UV and Light and more cost effective than Aluminum Foil, ideal for tea bags, coffee bags, snacks, and peanuts
OPP AL PE

Aluminum foil middle layer for excellent oxygen and light barrier, Provides long-term preservation for products like tea, coffee, plant/veterinary drugs
PET MPET PE

PET provides excellent tensile strength and resistance to tearing while MPET retains certain transparency while maintain as middle layer for barrier properties with higher cost-efficiency, making this durable and food-safe structure used for tea, coffee, plant/veterinary drugs, cosmetics, and shampoo
PET AL PET

This combination is typically chosen for tea, coffee, plant/veterinary drugs, cosmetics
  • Optimal Product Protection Features

Composite films are designed with special layers of materials, each serving a unique function to protect products from environmental factors such as moisture, oxygen, UV rays, bacteria, and mechanical impacts. Notably, the aluminum layer in the composite structure protects the product from light and oxygen, keeping food or products in the packaging from deteriorating or losing quality.

  • Good Heat Resistance

Composite films can withstand high temperatures during processing, packaging, and transportation without deforming or losing protective properties. This is particularly important for products that require storage under changing temperature conditions or need protection from heat impacts, such as prepared foods, pharmaceuticals, or consumer goods.

  • High Durability and Flexibility

Composite packaging has very high durability, ensuring optimal protection for products throughout transportation and storage. The material layers in the packaging can be designed to achieve the right rigidity or elasticity according to product requirements. Thus, composite films are suitable for a variety of products with different shapes, sizes, and protection needs.

  • High Aesthetic Appeal and Effective Advertising

Composite films can be printed with sharp, high-quality images, enhancing brand value and capturing consumer attention. With a glossy surface layer and clear printing capabilities, composite packaging makes products stand out on shelves and easily impress customers.

  • Cost-Effective and Easy to Use

Using composite films helps reduce packaging costs by integrating multiple protective features into a single product. Replacing single-layer packaging or multi-step packaging can help businesses save costs and improve production efficiency. Composite packaging is also easy to use and store.

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Applications

Composite packaging has a wide range of applications across various industries due to their superior features. Some common applications include:

Food

Packaging for prepared foods, frozen foods, snacks, coffee, spices, and ready-to-eat meals.

Pharmaceuticals

Packaging for medications, cosmetics, and products sensitive to moisture and light.

Cosmetics and Personal Care

 Packaging for beauty care products, shampoos, body washes, and lotions.

Consumer Products

Packaging for household items, electronics, and machinery components.

Gift and Handicrafts

Packaging for gifts and premium handicraft items

TECHNIQUE

The printing process for composite films begins with preparing materials such as PET, PE, or BOPP, followed by printing images and product information on one or more layers using technologies like flexographic or digital printing. After printing, the film layers are bonded together using adhesives or heat, creating a complete packaging product.

During this process, since the packaging comes into direct contact with food, it is produced in a strictly hygienic environment to ensure consumer health safety. This technique offers numerous advantages, including sharp print quality and vibrant colors, moisture and dust resistance, high durability, and flexibility in application for various products, from food and cosmetics to consumer and industrial goods.

Materials

OPP & PE
  • The outer layer of OPP provides good printing capabilities and high aesthetics, while PE offers excellent moisture resistance.
  • Suitable for dry food packaging, cookies, and instant noodles, due to its durability and ability to protect products from dirt and moisture.
PA & PE
  • PA offers high mechanical strength and good load-bearing capacity, while the PE inner layer provides flexibility and softness.
  • Ideal for packaging rice, fertilizers, cement, and animal feed, due to its ability to withstand harsh conditions and protect products effectively.
OPP & MCPP
  • MCPP in the inner layer helps prevent oxidation, block UV and light, and is more cost-effective compared to aluminum film.
  • Ideal for packaging tea, coffee, snacks, and peanuts, protecting products from light and maintaining long-term quality.
OPP & CPP & PE
  • OPP enables high-quality printing, CPP provides excellent sealing capabilities, and PE acts as a moisture barrier.
  • Commonly used in food packaging, textiles, and animal feed, helping to protect products from moisture and ensuring strong, secure packaging.
OPP & AL & PE
  • The Aluminum Foil (AL) layer offers excellent protection against oxygen and light, allowing for long-term preservation of products.
  • Suitable for products such as tea, coffee, veterinary/agricultural products, maintaining product quality and protecting it from environmental factors.
PET & MPET & PE
  • PET provides excellent tensile strength and tear resistance, while MPET retains some transparency and offers effective barrier properties.
  • PET provides excellent tensile strength and tear resistance, while MPET retains some transparency and offers effective barrier properties.
PET & AL & PET
  • This combination features aluminum foil between two layers of PET, increasing its ability to block oxygen and light.
  • This laminated structure is commonly selected for packaging products such as tea, coffee, veterinary/agricultural products, and cosmetics, offering long-term preservation and optimal protection.

Manufacturing Technology

1. Preparation of Printing Films
  • The first step in the process is preparing the packaging films, typically materials like PET (Polyethylene Terephthalate), PE (Polyethylene), or BOPP (Biaxially Oriented Polypropylene).
  • These films are chosen based on the product’s requirements and intended use, such as moisture resistance, strength, or flexibility, as well as cost and the nature of the product contained within the packaging.
2. Printing Images and Product Information
  • After preparing the films, images and product information are printed onto one or more layers of the film using modern printing technologies.
  • Common technologies include flexographic printing (rubber printing) and digital printing, depending on the required sharpness, quantity of products, and design characteristics.
3. Laminating the Film Layers
  • After printing, the film layers are laminated together to create the finished packaging product.
  • This lamination process can be done using adhesives or heat to bond the layers together, depending on the material characteristics and product requirements.
4. Ensuring Hygiene in the Production Process
  • Since the packaging will come into direct contact with food or consumer products, the production process must adhere to strict hygiene standards.
  • The production environment must be controlled to ensure consumer health safety and prevent contamination or exposure to harmful substances.

Other products - applications

Shrink film

Shrink film

Decal

Decal