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Aluminum foil self-adhesive labels are a type of functional label material with an aluminum foil base, coated on the back with pressure-sensitive adhesive (self-adhesive), and the surface can be printed or combined with other materials. Their core structure typically includes: the aluminum foil base (providing a metallic texture and barrier properties), the printing ink layer (optional), the pressure-sensitive adhesive layer (acrylic or rubber-based adhesive), and the release paper (protecting the adhesive surface). The metallic nature of aluminum foil makes it both aesthetically pleasing and functional, widely used in label scenarios requiring moisture-proofing, light-blocking, high-temperature resistance, or high-end decoration, such as food packaging, pharmaceutical labels, and cosmetic bottle stickers.
Core characteristics of aluminum foil self-adhesive labels
1. Physical and barrier properties
High barrier properties:
The thickness of the aluminum foil layer is usually 6-20 μm, which can completely block oxygen, moisture, light (transmittance < 0.1%) and odors, preventing the oxidation and deterioration of the contents (such as the moisture-proof and oxygen-blocking effect of coffee packaging labels).
Strong reflection of ultraviolet rays, avoiding the failure of drugs and photosensitive materials due to light exposure (such as the light-blocking requirement of vaccine cold chain labels).
High temperature resistance and low temperature resistance:
It can withstand a temperature range of -40°C to 180°C, suitable for high-temperature sterilization packaging (such as can labels) or frozen food labels, and the adhesive layer still maintains adhesion at extreme temperatures.
Metallic texture and stiffness:
The aluminum foil surface naturally has a metallic luster, which can be used as a mirror effect label directly, or through embossing processes to form a matte, brushed, or other textures (such as the metal texture labels for luxury packaging).
The aluminum foil substrate has high stiffness (bending stiffness up to 0.5-1 mN·m), making the labels less likely to fold after application, suitable for curved bottle bodies (such as round cans, test tubes), and easy to fit flatly.
2. Adhesive properties
Pressure-sensitive adhesive types:
Acrylic adhesive: Strong weather resistance, suitable for outdoor or long-term use scenarios (such as oil can labels), with a holding force of ≥ 24 hours (tested according to GB/T 4851).
Rubber-based adhesive: High initial adhesion, suitable for rough surfaces (such as corrugated cardboard), with a peel force of 1.0-2.5 N/25mm (according to GB/T 2792 standards).
Environmental adaptability:
Excellent resistance to water and oil, the adhesive surface is not easily penetrated by juices, oils, etc., maintaining a firm adhesion (such as kitchen product labels).
Some models support removable features, with no residue after removal (such as temporary labels for promotions).
3. Printing and processing adaptability
Printing compatibility:
The aluminum foil surface is smooth, suitable for intaglio printing, flexographic printing, and stamping processes, with an oil ink adhesion strength of ≥ 4 grades (tested according to GB/T 7700), and metallic color inks can present a mirror effect.
Local hollowing and die-cutting of irregular shapes (such as circles, waves) can be performed to meet personalized design requirements (such as the irregular aluminum foil labels on cosmetic bottle bodies).
Composite process compatibility:
It can be combined with PET, PE films, etc., to enhance flexibility (such as aluminum foil + PE composite used for self-standing bag labels), or combined with paper to reduce costs (such as aluminum foil self-adhesive labels stickers).
4. Environmental and safety aspects
Recyclability: Pure aluminum foil self-adhesive labels can be recycled for aluminum metal through incineration, but products with composite plastic layers need to be classified for disposal; some brands have launched water-based adhesive aluminum foil labels to reduce VOC emissions.
Food contact safety: Compliant with FDA, GB 4806.9 food contact material standards, the adhesive layer has no migration risk, suitable for labels in direct contact with food (such as chocolate packaging).
Aluminum foil self-adhesive labels are a type of functional label material with an aluminum foil base, coated on the back with pressure-sensitive adhesive (self-adhesive), and the surface can be printed or combined with other materials. Their core structure typically includes: the aluminum foil base (providing a metallic texture and barrier properties), the printing ink layer (optional), the pressure-sensitive adhesive layer (acrylic or rubber-based adhesive), and the release paper (protecting the adhesive surface). The metallic nature of aluminum foil makes it both aesthetically pleasing and functional, widely used in label scenarios requiring moisture-proofing, light-blocking, high-temperature resistance, or high-end decoration, such as food packaging, pharmaceutical labels, and cosmetic bottle stickers.
Core characteristics of aluminum foil self-adhesive labels
1. Physical and barrier properties
High barrier properties:
The thickness of the aluminum foil layer is usually 6-20 μm, which can completely block oxygen, moisture, light (transmittance < 0.1%) and odors, preventing the oxidation and deterioration of the contents (such as the moisture-proof and oxygen-blocking effect of coffee packaging labels).
Strong reflection of ultraviolet rays, avoiding the failure of drugs and photosensitive materials due to light exposure (such as the light-blocking requirement of vaccine cold chain labels).
High temperature resistance and low temperature resistance:
It can withstand a temperature range of -40°C to 180°C, suitable for high-temperature sterilization packaging (such as can labels) or frozen food labels, and the adhesive layer still maintains adhesion at extreme temperatures.
Metallic texture and stiffness:
The aluminum foil surface naturally has a metallic luster, which can be used as a mirror effect label directly, or through embossing processes to form a matte, brushed, or other textures (such as the metal texture labels for luxury packaging).
The aluminum foil substrate has high stiffness (bending stiffness up to 0.5-1 mN·m), making the labels less likely to fold after application, suitable for curved bottle bodies (such as round cans, test tubes), and easy to fit flatly.
2. Adhesive properties
Pressure-sensitive adhesive types:
Acrylic adhesive: Strong weather resistance, suitable for outdoor or long-term use scenarios (such as oil can labels), with a holding force of ≥ 24 hours (tested according to GB/T 4851).
Rubber-based adhesive: High initial adhesion, suitable for rough surfaces (such as corrugated cardboard), with a peel force of 1.0-2.5 N/25mm (according to GB/T 2792 standards).
Environmental adaptability:
Excellent resistance to water and oil, the adhesive surface is not easily penetrated by juices, oils, etc., maintaining a firm adhesion (such as kitchen product labels).
Some models support removable features, with no residue after removal (such as temporary labels for promotions).
3. Printing and processing adaptability
Printing compatibility:
The aluminum foil surface is smooth, suitable for intaglio printing, flexographic printing, and stamping processes, with an oil ink adhesion strength of ≥ 4 grades (tested according to GB/T 7700), and metallic color inks can present a mirror effect.
Local hollowing and die-cutting of irregular shapes (such as circles, waves) can be performed to meet personalized design requirements (such as the irregular aluminum foil labels on cosmetic bottle bodies).
Composite process compatibility:
It can be combined with PET, PE films, etc., to enhance flexibility (such as aluminum foil + PE composite used for self-standing bag labels), or combined with paper to reduce costs (such as aluminum foil self-adhesive labels stickers).
4. Environmental and safety aspects
Recyclability: Pure aluminum foil self-adhesive labels can be recycled for aluminum metal through incineration, but products with composite plastic layers need to be classified for disposal; some brands have launched water-based adhesive aluminum foil labels to reduce VOC emissions.
Food contact safety: Compliant with FDA, GB 4806.9 food contact material standards, the adhesive layer has no migration risk, suitable for labels in direct contact with food (such as chocolate packaging).
