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:
aluminium spout pouch wholesaler
eco friendly spout pouches price
Is the food vacuum packaging bag resistant to high temperature?
Significant price increase in raw materials for octagonal sealed packaging bags
Popular recommendation
Custom Portable Reusable Drink Bags Stand Up Plastic Spout Pouches For Beverages Liquid Packaging
Bag-In-Box
Custom Size Printed Coffee Milk Juice Wine Bib Bag-In-Box With Valve Gift Cardboard Box
bag in box Processing
eco friendly spout pouches distributors
bag in box sales
spout pouch serves custom
Coffee Tea pouch Manufacturing
eco friendly spout pouches manufacture
spout pouch packaging wholesaler
Top-line packaging exhibition
Did you choose the right rice packaging bag?
Packaging airbag inflation
What are the benefits of vacuum rice packaging?
Aluminum foil vacuum packaging and transparent vacuum packaging.gusset aluminum foil bag distributor
ordering flexible packaging film roll sales.The shortcomings of environmental bags
Top-line packaging as a professional Bag-In-Box manufacturer, committed to producing high-quality pa
Aluminum Foil Bag's applicable range is wide.aluminium coffee bag Factory
The characteristics and application of composite packaging bag
Material of liquid bag
Food water packaging bags are safer.spout pouch packaging bags
Box in Bag Industry Market.bag in box maker
Aluminum foil bag basic knowledge
Market size of self-supporting bag industry.custom standing pouch
The use of aluminum foil bags.aluminum foil bags for grilling
Several biological base materials for degradable packaging bags.Flexible packaging film roll Product
How about the weight of the packing bag
Have you used the common plastic packaging bags correctly
How to build a packaging bag brand?
The advantages and applications of Spout POUCHES