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:
biodegradable spout pouches Production
Packaging has higher hygiene requirements for food bags.smart food snack bags distributors
Popular recommendation
Eco Friendly Plastic Mylar Pouch Stand Up 50ml 100ml 200ml 250ml Custom Aluminum Spout Pouch
Spout pouch
Hot Sale BPA Free Plastic Drink Juice Fruit Liquid Packaging Stand Up Bag Spout Pouch
eco friendly spout pouches sales
eco friendly spout pouches Vendor
spout pouches Manufacturing
spout pouch bag wholesale
new super pouch wholesaler
wine bag in box Manufacturing
spout pouch serves Solution
What are the special properties of aluminum foil bags explained by the manufacturer of aluminum foil
What should be paid attention to in the customized production of rice packaging bags.super pouch too
Food vacuum packaging bag: a very convenient packaging method
Top-line packaging exhibition
The Versatility of Bag-in-Bag Liquid Packing Products and Filling Machines
The printing principle of composite bags!beverage bag manufacturers
Shaped Pouches: The Ultimate Guide
Differences in the Materials of Composite Packaging Bags
Packaging bag development history
bag for food packaging.What are the application scope of composite packaging bags
Convenient circulation of packaged food
What is a biodegradable packaging bag?spout pouch serves Solution
What problems will be encountered when using a vacuum packaging bag packaging food.vacuum sealer bag
New high isolation plastics have been widely used.bag in box Factory
Packaging bag design and production
flexible packaging film roll pouches custom.How can we find a good supplier for packaging bags with
Food water packaging bags are safer.spout pouch packaging bags
Food packaging bag should be used correctly.Snack food bag bulk
The advantages of choosing aluminum foil packaging bag.aluminum foil bags for grilling Manufacturing
properties of flexible packaging films Manufacturing.What factors will affect the quality of plastic