The sticky or adhesive property of stickers is typically achieved through the use of pressure-sensitive adhesives (PSAs). Pressure-sensitive adhesives are tacky substances that adhere to surfaces when pressure is applied.
The adhesive layer of a sticker is usually composed of a combination of polymers, resins, and tackifiers that create a sticky surface. These materials are chosen for their ability to provide strong initial adhesion and maintain a bond over time.
Common materials used in the adhesive layer of stickers include:
Acrylic: Acrylic adhesives offer good adhesion to a wide range of surfaces and exhibit excellent resistance to temperature, moisture, and UV radiation.
Rubber: Rubber-based adhesives provide high tack and initial adhesion. They are flexible and conform well to uneven surfaces.
Silicone: Silicone adhesives have high-temperature resistance and can maintain their adhesive properties over a wide temperature range. They are often used in applications where high heat resistance is required.
Water-based: Water-based adhesives are environmentally friendly and have low VOC (volatile organic compound) content. They are commonly used in labels and stickers that come into direct contact with food or sensitive materials.
The specific formulation of the adhesive can vary depending on the intended application of the sticker, such as indoor or outdoor use, temporary or permanent adhesion, and the surface it will be applied to. Different adhesive materials and formulations offer varying levels of tackiness, bonding strength, and durability.
