Professional Custom Stickers Printing Manufacturer Since 2005
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Professional Custom Stickers Printing Manufacturer Since 2005
Adhesive labels are a common type of identification material used across various industries. Their composition can be understood from the following aspects:
1. Basic Composition
Adhesive labels are primarily composed of three key parts:
• Surface Material (Face Stock):
This is the crucial part of the adhesive label, as it directly contacts the surface to which the label is applied. The surface material must be durable, resistant to abrasion and corrosion, and easy to adhere. Common surface materials include paper (such as coated paper, thermal paper, and writing paper), films (such as polyester PET and polyvinyl chloride PVC), and specialty materials (such as pearlized film and holographic film).
• Adhesive:
The adhesive serves as the bonding agent between the label and the substrate. It must have quick bonding properties, long-lasting adhesion, and good weather resistance. Common adhesives include acrylic, polyurethane, and various types such as hot melt, water-based, oil-based, and freezer adhesives.
• Liner (Release Liner):
The liner supports the surface material and adhesive. It needs to have sufficient strength and durability while being easy to tear. Common liner materials include glassine paper and coated paper. The liner surface is usually coated with a release agent (such as silicone oil) to prevent the adhesive from sticking to it.
2. Extended Composition (From Manufacturing and Quality Assurance Perspectives)
In actual production, the composition of adhesive labels can be more complex and may include:
• Surface Coating:
A layer applied to the surface material to modify its properties, such as enhancing surface tension, changing color, or adding a protective layer. This coating helps the label better accept ink and printing, prevent smudging, improve ink adhesion, and protect against print deterioration.
• Undercoating:
A layer applied to the back of the surface material, corresponding to the surface coating but with different functions. It may enhance the bond between the face stock and adhesive or serve other specific purposes.
• Release Coating:
A coating, typically silicone oil, applied to the liner’s surface to create a low-tension, smooth surface. This prevents the adhesive from sticking to the liner, making it easier to peel off and use the label.
• Back Coating:
In special circumstances or for specific products, a protective coating is applied to the back of the liner. This prevents the adhesive from sticking to the liner after waste removal or rewinding, which could make the label unusable. Back coating is also used to produce multi-layer labels or for printing on the back.
In summary, the composition of adhesive labels includes not only the basic elements of surface material, adhesive, and liner but may also involve additional layers like surface coating, undercoating, release coating, and back coating, depending on the manufacturing process and specific requirements. These components work together to form the complete structure of an adhesive label, providing broad applicability and excellent performance.
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