Adhesives

Glossary Term: Adhesives

Definition: Adhesives are substances that are used to bond two or more materials together. They create a lasting connection between surfaces by forming a chemical or physical bond. In the printing industry, adhesives are used to attach various components, such as labels, coatings, and laminates, to the printed material.

More Details and Examples:

• Types of Adhesives:
  • Pressure-sensitive adhesives (PSAs): These adhesives adhere to surfaces upon contact with pressure. Examples include sticky notes, labels, and tapes.
  • Water-based adhesives: These adhesives are composed of water-based emulsions or dispersions. They are often used in the printing industry for laminating and coating applications.
  • Solvent-based adhesives: These adhesives contain solvents that evaporate during the drying process, leaving behind a strong adhesive bond. They are commonly used for industrial applications and can offer high-performance bonding.
  • Hot-melt adhesives: These adhesives are applied in a molten state and solidify upon cooling, forming a strong bond. They are often used for packaging and labeling applications.
• Applications in Printing:
  • Labeling: Adhesives are used to attach labels to products or packaging.
  • Laminating: Adhesives are used to bond a protective film or coating to the printed material.
  • Bookbinding: Adhesives are used to bind the pages of books together.
  • Packaging: Adhesives are used to seal packaging materials, such as boxes and bags.
• Factors Affecting Adhesive Performance:
  • Surface preparation: The surfaces to be bonded must be clean and free of contaminants for optimal adhesion.
  • Adhesive type: The choice of adhesive depends on the materials being bonded, the required bond strength, and environmental factors.
  • Application method: The adhesive must be applied correctly and evenly for optimal performance.
  • Drying or curing conditions: The adhesive may require specific drying or curing conditions to achieve its full bond strength.

In summary, adhesives play a critical role in the printing industry by providing the means to bond various components together. Understanding the different types of adhesives and their applications can help printers select the appropriate adhesive for their specific needs and ensure the quality and durability of their products.