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:
Smell Proof Stand Up Flat Bottom Pouch Coffee Bag /Coffee Beans Bag With Air Release Valve And Reusa
Thermal insulation: the guardian of temperature
What is the integrity and advantage of PET FOOD BAG?petco free dog food bag maker
Popular recommendation
Smell Proof Stand Up Flat Bottom Pouch Coffee Bag /Coffee Beans Bag With Air Release Valve And Reusa
Bag-In-Box
China Factory Baby Complementary Food Spout Pouch Baby Food Fruit Puree Bag With Spout Packaging Bag
aluminium spout pouch price
Pouch with handle wholesale
refillable spout pouches company
bag in box packaging Solution
spout pouch bag custom
smart food Snack food bag company
mulberry mini pouch with handle price
The selection details of paper bag making are important
Introduction to the functions, features and usage of spout bags
stand up pouch with spout packaging Factory.Classification and material of packaging bags
The production process and process of vacuum packaging bags
Super Pouches: Revolutionizing Flexible Packaging for Top-Line Packaging Solutions
The function of Bag-in-Box
Packing bag sealing brittle and brittle break how to do?
What is the sealing length of the bag in box?
Customized milk tea packaging bag manufacturers
Packaging bag development history
aluminium coffee bag Processing.What should a good plastic packaging bag look like
The high-quality characteristics of food composite bags play a key role in the market.printed snack
Causes and solutions for the difficulty of aluminum foil bags.aluminum foil bags for grilling
Food packaging bags that need high temperature characteristics.biodegradable clear mailing bags Manu
Food safety testing methods for liquid packaging bags.digital flexible packaging
Do you need to pay attention to the shelf life of food packaging bags?petco free dog food bag distri
Usage of vacuum bags.aluminum foil bag large
How to use sterile bags.bag in box Vendor
Explanation on Different Materials and Valves of Bags in Boxes.bags in a box
What material is good for vacuum Vacuum Zipper Bag?zipper vacuum sealer bag