Laminated packaging bags are made from multiple layers of different materials combined together. Their structure, functions, and applications are as follows:
Structure
laminated packaging bags typically consist of the following layers.
Outer Layer
Materials: Polyester (PET), Nylon (PA), etc.
Functions: Provides excellent printability, abrasion resistance, and mechanical strength.
Middle Layer (Functional Layer)
Materials: Aluminum foil (AL), Polyethylene (PE), Polypropylene (PP), EVOH (Ethylene Vinyl Alcohol Copolymer), etc.
Functions: Provides barrier properties (moisture-proof, oxygen-proof), aroma retention, and strength.
Inner Layer (Heat-Sealing Layer)
Materials: Polyethylene (PE), Polypropylene (PP), etc.
Functions: Provides heat-sealing properties to ensure the bag mouth is sealed.
Functions
laminated packaging bags have various functions, including
Barrier Properties
Effectively block oxygen, moisture, light, etc., extending the product's shelf life.
Mechanical Strength
Provide sufficient tensile strength and tear resistance, ensuring the packaging bag is not easily damaged during transportation and storage.
Heat-Sealing Properties
Ensure the bag mouth can be securely sealed, preventing product leakage and contamination.
Printability
The outer layer material is suitable for high-quality printing, facilitating promotion and brand marketing.
Applications
laminated packaging bags are widely used in various industries, including
Food Packaging
Used for packaging snacks, beverages, condiments, convenience foods, etc., ensuring the freshness and safety of the food.
Pharmaceutical Packaging
Used for packaging medicines, medical devices, etc., ensuring product hygiene and efficacy.
Cosmetic Packaging
Used for packaging cosmetics, skincare products, etc., maintaining product stability and texture.
Industrial Product Packaging
Used for packaging electronic products, chemical products, daily chemicals, etc., providing good protection and ease of transportation.
By combining different materials, laminated packaging bags offer comprehensive performance in various application scenarios, meeting diverse packaging needs.