There are many types of laminating adhesives for flexible packaging. The following main types can be summarized:
1、Polyurethane adhesive:
● Features: high bonding strength, good temperature and moisture resistance and wide application range.
● Application: Due to the high transparency of polyurethane materials, the packaging bags after bonding will not affect the appearance of the product, so it is the most widely used flexible packaging adhesive.
2、Acrylic adhesive:
● Features: solvent-free adhesive, fast drying, easy processing, good chemical stability.
● Application: Suitable for bonding materials such as paper, film and plastic.
3、Chloroprene rubber adhesive:
● Features: excellent oil resistance, solvent resistance, heat resistance, aging resistance and other properties.
● Application: Suitable for bonding materials such as metal, plastic, rubber, etc.
4、Vinyl ester adhesive (hot melt adhesive):
● Features: hot melt adhesive, high viscosity, high construction efficiency and good shear strength. But it is relatively brittle and hard, and its scope of use is limited.
● Application: It is more common in occasions where rapid curing is required, especially in high-speed production environments.
5、Water-based glue:
● Features: environmentally friendly, non-toxic, odorless, and low cost. However, the viscosity and bonding strength are relatively low, and it needs to be applied to the substrate in advance and dried before bonding.
● Application: widely used in flexible packaging, paper products and other fields.
6、Solvent-based glue:
● Features: high viscosity, strong bonding strength, and fast curing speed. However, the cost is high, and organic solvents have certain hazards to the environment and health.
● Application: widely used in flexible packaging in the fields of food, medicine, etc.
7、UV curing glue:
● Features: fast curing speed, small glue output, and no solvent. However, the curing conditions are more stringent and need to be cured under a specific ultraviolet light source.
● Application: widely used in flexible packaging, printing and other fields.
In addition, there are also types such as solvent-free two-component adhesives, which are suitable for specific composite structures and materials, such as aluminum-plastic, plastic-plastic and other structural products.
In general, there are many types of laminating adhesives for flexible packaging, each with its own characteristics and applicable scenarios. When choosing, it is necessary to comprehensively consider factors such as specific packaging needs, material type and production environment.
Post time: Jun-24-2024