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In the soft packaging industry, the choice of adhesive is crucial. Different types of adhesives are suitable for different packaging materials and process requirements. As the leading company in the domestic high-performance composite polyurethane adhesive industry, COMENS understands the importance of flexible packaging adhesives and is committed to providing diverse solutions for customers. Next, let's explore the types and characteristics of flexible packaging adhesives.
Solvent-based adhesives have secured a position in the soft packaging industry due to their wide applicability, excellent initial adhesion, and composite strength. They are suitable for a variety of substrates and can provide outstanding bonding performance, ensuring the transparency and flexibility of composite films. Additionally, solvent-based adhesives also possess good heat resistance, cold resistance, and medium resistance, meeting the packaging needs in various complex environments. Moreover, their safety, hygiene, and odorless characteristics comply with FDA standards and VOC (Volatile Organic Compounds) regulations. However, solvent-based adhesives release organic solvents during use, which can impact human health and the environment, and this issue needs attention.
With the increasing environmental awareness, water-based adhesives have gradually become a popular choice in the soft packaging industry. Water-based adhesives are favored by many users for their environmentally friendly properties and no solvent residue. The water-based adhesive for flexible packaging can be used on medium to high-speed composite machines, require less adhesive, and have lower overall usage costs. Furthermore, water-based adhesives offer good composite strength to metallized films without damaging or transferring the metallized layer. However, water-based adhesives have high requirements for the surface properties of films and tend to show noticeable decreases in composite strength over time. Additionally, their use requires high heating and exhaust capabilities from the composite equipment, which must also be considered.
Solvent-less adhesives have become a new force in the soft packaging industry due to their non-toxic, environmentally friendly, and solvent-free volatile characteristics. They are safe to handle, do not require fire or explosion-proof measures, use fewer adhesives, and have simple composite processes. Solvent-less adhesives are suitable for fields with high safety requirements, such as food packaging. However, the investment in solvent-free composite equipment is substantial, and the coating system is more complex, requiring heating devices. Additionally, their high adhesive viscosity, low initial adhesion, and long curing time also limit their application in certain fields.
In conclusion, different types of flexible packaging adhesives each have their advantages and disadvantages. Users should comprehensively consider the product characteristics and process requirements when selecting. COMENS, as an industry-leading enterprise, will continue to pay attention to market dynamics and technological development trends, providing customers with higher-quality products and services.
