The quality manager who selects labels for frozen foods, chemical products, or containers that pass through pasteurization tunnels faces a technical problem: the standard adhesive fails. This guide defines the criteria for selecting industrial adhesives by temperature range, chemical resistance, and food-grade certification, with a 48-hour field test protocol the customer's laboratory can run before authorizing the print run.
Cryogenic Adhesives vs. Standard Hot-Melt in Frozen Foods
Conventional labels fail in freezer rooms for two physical reasons: first, conventional hot-melt adhesive crystallizes at low temperature, losing tack (initial grab) and adhesion. Second, the surface condensation that forms when the product leaves the freezer creates a film of water between the label and the container that prevents the adhesive from anchoring.
Modified acrylic adhesives for the cold chain
ETIVAL uses adhesives with an operating range of -40°C to +70°C. The acrylic does not crystallize at low temperature because its glass transition temperature (Tg) is -55°C, below the point. The adhesive keeps tack even with surface condensation, because the acrylic formulation has an affinity for water that displaces the liquid film.
NOM-138 Compliance for Cleaning and Disinfection Products
NOM-138 establishes the container requirements for cleaning, disinfection, and household chemical products. Labels must withstand contact with hypochlorite, degreasers, disinfectants, and solvents without the chemical product dissolving the inks or erasing the safety warnings.
Technical specifications for chemical resistance
- Synthetic : opaque white or transparent BOPP (not paper — paper absorbs).
- Barrier laminate: overprint with a matte or gloss laminate that seals the ink against the chemical.
- : full UV curing (not water-based inks, which are soluble in alkaline chemicals).
- Permanent high-cohesion adhesive: one that will not migrate or soften with solvents.
- Tamper-evident seals: destructible materials that break when removal is attempted, leaving evidence of opening.
FDA (21 CFR 175.105) and ISEGA Certifications
For food contact, labels must comply with two regulatory frameworks depending on the type of contact:
Indirect contact (FDA 21 CFR 175.105)
The adhesive does not come into direct contact with the food, but it sits on the container's surface. FDA 21 CFR 175.105 regulates adhesives for indirect food use. Requirement: the adhesive must not migrate substances into the food at detectable levels. ETIVAL's water-based and UV inks comply with this standard.
Direct contact (ISEGA / BfR XXXVI)
For labels applied directly onto fruit or food (e.g., labels on apple, banana, or mango skin), ISEGA (Germany) or BfR XXXVI (European) certification is required. These certify that the ink and adhesive contain no heavy metals or migratory photoinitiators at detectable levels.
- -40°C
- Minimum temperature of the cryogenic adhesive
- 2.5 N
- Minimum peel adhesion at -18°C (FINAT FTM-1)
- 21 CFR
- FDA regulation for food contact
- 48h
- Duration of the field test protocol
The 48-Hour Field Test Protocol
Step-by-step guide for the customer's laboratory to run ice-bath, freezer, and steam tests with ETIVAL samples before authorizing the mass print run:
ETIVAL sends a sample kit with data sheet and protocol.
ETIVAL Editorial Team
We manufacture for all of Mexico · ISO 9001:2015
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