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:
Eco Friendly Plastic Mylar Pouch Stand Up 50ml 100ml 200ml 250ml Custom Aluminum Spout Pouch
Development prospect of packaging bags
Before printing on soft packaging, determine the types and usage methods of water-based ink additive
Popular recommendation
125g 250g 500g 1kg Aluminum Foil Flat Bottom Coffee Bean Bags With Valve
Aluminum foil bag
Custom Special Shaped Super Pouch Aluminum Foil 1.5L 3L 5L Stand Up Drink Juice Liquid Pouch With Va
bag in box packaging price
packaging spout pouch company
spout pouch bags Manufacturing
bag in box packaging custom
Spout pouch flexibility Manufacturing
juice bag in box Factory
box-in-box wholesaler
Customized milk tea packaging bag manufacturers
The printing principle of composite bags.eco friendly spout pouches custom
Flexible Packaging: The Smart Future of Bag-in-Box Solutions
Why are cylindrical bag-in-box so popular?
Shaped Pouches: The Ultimate Guide
Hitting the pain points of gift box packaging directly, three simple points make packaging customiza
What are the liquid packaging methods?
The advantages and development prospects of aluminum foil bags
The quality of rice vacuum packaging is very important
Environmental protection of coffee bags
Composite packaging bag.pouch bag with handle price
I will introduce to you what is the eight -side sealing bag
Analyze the factors that may affect the production environment of fruit juice bags?liquid spout bags
Seven common food packaging materials.biodegradable clear mailing bags Processing
Introduction to Customizing Methods of Plastic Packaging Bags in Supermarkets.bag in box company
Structural composition of Spout pouch
Sewing intensity of plastic packaging bags.aluminum foil bags for cooking manufacture
digital printing flexible packaging distributors.What are the uses of composite film packaging bags
The characteristics and necessity of anti -ultraviolet packaging bag
flexible packaging film properties Solution.Reasons and control measures for easy breakage of organ