Tel: +86 188 2689 9458
source:Industry News release time:2023-11-13 Hits:
Generally speaking, the basic structure of composite materials is that the outer layer of composite packaging materials should be materials with high melting point, good heat resistance, less scratches and burrs, good printing function, and good optical function. Commonly used materials include paper, aluminum foil, fiberglass, polycarbonate, nylon, polyester, polypropylene, etc.
The inner layer materials should have functions such as heat sealing, good adhesion, odorless, non-toxic, oil resistant, water resistant, and chemical resistant, such as heat-resistant plastic materials such as polypropylene, polyethylene, and polyvinylidene chloride. The middle layer of composite materials with three or more layers generally uses materials with good functions such as blocking gas and moisture, and shielding light, and high mechanical strength, such as aluminum foil, polyvinylidene chloride, cellophane, paper, polyethylene, etc.
Adhesive is applied between layers for bonding. Generally, solvent based thermosetting polyurethane adhesive is used between the outer layer and the middle layer, and modified polypropylene lotion adhesive or specially modified carbonyl propylene containing resin is used between the inner layer and the middle layer. The outer layer adhesive requires high bonding strength, simple process, and low cost; The adhesive used for the inner layer requires high temperature resistance, high peel strength, non-toxic, tasteless, and does not affect the nutritional composition of the food, which can effectively maintain the color, aroma, and taste of the food.
In recent years, foreign countries have developed a uniform coating agent on the surface of the substrate film to improve the airtightness, oil resistance, and chemical stability of packaging materials, making it suitable for various food packaging. Commonly used coating agents include polyvinylidene chloride resin and polypropylene polyvinylidene chloride resin. The methods of coating include single-sided coating and double-sided coating.
Read recommendations:
Liquid bags: making agricultural input packaging more efficient
Popular recommendation
Super pouch
Custom Special Shaped Super Pouch Aluminum Foil 1.5L 3L 5L Stand Up Drink Juice Liquid Pouch With Va
Custom Size Printed Coffee Milk Juice Wine Bib Bag-In-Box With Valve Gift Cardboard Box
bag in box Factory
bag in box manufacturer
biodegradable spout pouches distributors
juice bag in box sales
spout pouch bags wholesaler
bag in box supplier
packaging spout pouch company
Analyze the composition of plastic packaging bags
Development prospect of packaging bags
Sterilization classification and principle of sterile bags
Bag-In-Box: The Future of Flexible Packaging and Its Impact on Top-line Growth
Will liquor vacuum bags affect the wine?
Introduce the development trend of pet food packaging.Spout pouch flexibility Factory
stand up pouch coffee packaging wholesaler!How to order universal vacuum packaging bags?
About the thickness of vacuum packaging bag
What is the difference between plastic packaging bags and paper bags
Is the food vacuum packaging bag resistant to high temperature?
Food packaging bags.printed snack food bags manufacturer
Test standards for frozen food packaging
The choice of plastic packaging bags need to pay attention to these 8 points!
Production precautions for aluminum foil bags.disposable aluminum foil bag
Aluminum foil bag manufacturers are widely used in aluminum foil bags and have many advantages
Powder packaging bag.Pouch with handle wholesale
Food vacuum packaging bag customized why favor nylon composite film
How to deal with waste packaging bags?
Plastic packaging bag purchase requirements.aluminum foil bags for grilling Production
What are the requirements for designing food packaging bags