GB 4806.15 Food-Contact Adhesives: 3 Practical Boundaries Printing Companies Should Clarify Before Accepting Coating and Lamination Orders
💡 💡 At a Glance
GB 4806.15 brings the adhesive layer of composite packaging out of the regulatory shadows, placing printing companies at the process stage of the responsibility chain. Three practical boundaries define the issue: First, the test report applies to the adhesive supplier's product, while the lamination process belongs to the printing company—the report does not necessarily correspond to the actual batch used. Second, migration compliance depends on following the specified coating weight in g/m² and curing temperature and time; reducing the drying temperature by 10℃ under production pressure can cause the finished product to exceed migration limits. Third, GB 4806.15 governs safety but not bond strength. Peel strength and temperature resistance belong in the customer specification, and these documents are parallel rather than inclusive. Before accepting a coating and lamination order, printing companies should first confirm three items: the coating weight and curing conditions, whether the customer requires a material report or finished-product verification report, and which document contains the strength requirements.
In March 2026, a customer making oat milk approached us with a design for the outer carton of a Tetra Pak brick.
The design specified two layers: “Base paper laminated with aluminium foil; the laminate must comply with food-contact requirements.”
The customer forwarded a test report and said it was the adhesive report, confirming compliance. After reviewing it, we asked one question: “Was this exact adhesive batch used for this lamination?”
The customer paused and replied: “We have an annual purchasing agreement with the adhesive manufacturer and review the test report for every delivery batch.”
This was where the first question arose. The report applies to the adhesive, but the responsibility lies in the lamination process.
After GB 4806.15, National Food Safety Standard for Food Contact Adhesives, was published in 2023, the responsibility chain for composite packaging was clearly divided for the first time: each material layer is governed by its own standard, and the adhesive layer is governed by GB 4806.15. A printing company performing coating and lamination sits immediately downstream of this layer: the material belongs to someone else, but the process belongs to the printing company.
First Boundary: The Report Subject and the Actual Material User Are Not the Same Party
GB 4806.15 regulates the adhesive itself: which monomers may be used in its formulation, what residue limits apply, and what migration limits apply when it comes into contact with food. These data are provided by the adhesive supplier through type testing or a certificate of analysis for each batch.
A carton laminating company performs a different operation: applying this compliant adhesive in the specified manner, at the specified coating weight, and curing it under the specified conditions.
The practical meaning of this first boundary is: Adhesive compliance does not mean your lamination is compliant.
When accepting an order, our company first checks two things: the adhesive supplier's test report, to confirm that the standard number and scope of application match the intended use; and the actual adhesive batch number used for the lamination, to determine whether it corresponds to that report. A customer's ability to provide a report does not mean that the report covers the material used in this production run.
The most common failure at this stage occurs when a customer works with several suppliers. The upstream lamination was performed by Company A, while this batch was assigned to Company B, which uses adhesive from a different manufacturer. The report is held by the customer, while the process is controlled by the printing company. When a problem occurs, both parties believe it is not their responsibility, yet liability is determined precisely by the process stage.
Second Boundary: Migration Compliance Depends on Following the Instructed Process
The specific migration limit (SML) for an adhesive under GB 4806.15 is determined through specific migration testing: the material is placed in a food simulant, exposed for a specified temperature and duration, and the amount of migrating substances is measured.
The key point is that this test is performed at the test-specimen level. It evaluates the adhesive itself, not the complete process in which the adhesive is applied to paper, dried, stored, and finally placed around food.
Unreacted monomers and residues in the adhesive need sufficient coating weight and adequate curing conditions to complete the reaction or volatilise. If the process departs from the instructions, migration performance will change.
One challenge we encountered was reducing the drying temperature by 10℃ to meet a tight delivery schedule. At the time, we believed the problem would be minor because the adhesive was food grade. Later, the customer's migration test on the finished product exceeded the limit. The investigation showed that the adhesive instructions specified a minimum curing temperature. To increase machine output, we reduced the temperature. Although the residual heat was still sufficient, the web's residence time on the belt was shortened, resulting in incomplete curing.
The second boundary therefore depends on two figures: coating weight (g/m²) and curing conditions (temperature + time). These are not determined independently by the printing company; they are established in the adhesive supplier's instructions and should be provided to the printing company when the order is placed. Without these figures, the adhesive manufacturer's test report is not valid evidence for this production batch.
Third Boundary: Safety Standards Do Not Cover Bond Strength
This third boundary is the easiest to confuse, and the confusion often occurs within the same meeting.
GB 4806.15 is a food safety standard. It determines whether an adhesive is safe when it comes into contact with food. It does not regulate the peel strength of the laminate, whether the laminate may crack during transportation, or whether the composite structure can withstand 60℃ retorting.
The customer's specification, however, governs strength. These are separate documents covering different failure modes.
We have encountered a customer who considered a report stating that the laminate complied with GB 4806.15 sufficient to begin production. The peel-strength test later failed, and the laminate delaminated at the interface. The customer said, “You passed the food safety standard,” while we replied, “The food safety standard did not address the structural requirement.” This is a typical example of the two requirements being treated as one.
The correct description of this third boundary is: Food compliance determines whether the package can hold the product, while the specification determines whether it can survive transportation. The two are parallel, not inclusive.
The First Three Figures to Request for This Type of Order
When converting the three boundaries into practical actions, we always ask the following questions before accepting a coating and lamination order:
First, what is the coating weight in g/m², and what are the curing temperature and duration? These figures come from the adhesive supplier's process instructions. If the customer cannot provide them, material selection is incomplete, or the laminating company has not aligned its process with the adhesive manufacturer. Without these figures, we cannot guarantee the migration performance of the finished lamination.
Second, which level of material documentation does the customer require? Is a GB 4806.15 report for the adhesive sufficient, or is a food simulant migration test report for the finished laminated product also required? These are not interchangeable. The former is material qualification; the latter is product verification. Only the latter applies to the final packaged product. Many orders fail to reach agreement at this point because customers assume that the former is enough.
Third, which document contains the strength requirements? Are the peel strength, temperature resistance, and boiling-water resistance specified in the customer specification or the packaging standard? If the customer has not defined them either, the acceptance criteria for the production batch are incomplete, and there is no objective basis for assigning liability if a problem occurs.
One Sentence for Customers
After GB 4806.15, the responsibility boundaries for composite packaging have become clearer: the adhesive manufacturer is responsible for the safety of the adhesive itself, the printing company is responsible for using it correctly according to the instructions, and the customer is responsible for confirming that the selected combination is suitable.
Of these three responsibilities, the printing company holds the middle segment, which is also the only segment that can be controlled through process parameters.
Our recommendation is therefore: include the coating weight, curing conditions, and finished-product verification requirements in the technical agreement before placing the order. Once these are documented, many issues no longer need to be disputed immediately before delivery.
Further Reading
- Migration Limits for Food-Contact Packaging: GB 31604 vs EU 10/2011—3 Practical Boundary Differences for Printing Companies—A companion article explaining how to interpret the migration limits under GB 4806.15
- Practical Guide to GB 4806 Testing for Food-Contact Packaging: 5 Frequently Blocked Test Items and 3 Remedies for Nonconformity—How to prepare for test sample submission
- 4 Real Cases of Migration Limit Exceedances in Food Packaging Printing: Identifying the Sources of Ink, Adhesive, Film Lamination, and Coating—The roles of the other three sources alongside adhesive
- 4 Composite Material Structures in Practice: Paper-Plastic, Aluminium-Plastic, Paper-Aluminium-Plastic, and Coextruded Film—Four approaches to composite structures
FAQ
Is GB 4806.15 a mandatory standard? Products made previously already complied. Do they need to be retested?
GB 4806.15 is a national food safety standard and a mandatory standard. It was published in 2023 and took effect in 2024. Transition arrangements and local enforcement may vary, but customers, especially brand owners and retail channels, now generally request compliance. For printing companies, the most practical approach is not to determine whether historical orders must be reworked, but to document three points: which adhesive supplier was used for each lamination batch, whether a GB 4806.15 report is available, and whether the report corresponds to the batch actually used. Historical orders do not necessarily need proactive rework, but the documentation chain should be established from the outset for new orders.
The adhesive used for lamination was supplied as a sample by the adhesive manufacturer, which also provided the test report. What else does our printing company need to do?
The report proves that the adhesive itself complies with GB 4806.15, but lamination is a separate process. The adhesive manufacturer does not control how much you apply, the drying temperature, or how long the web remains on the belt. During lamination, the printing company determines the process parameters, and any deviation can alter migration performance. For example, to meet a tight delivery schedule, one drying temperature was reduced by 10℃, and the finished product later exceeded the customer's migration limit. We therefore require customers to provide three items in the technical agreement: the adhesive test report, the coating weight in g/m², and the curing temperature and time. If any one is missing, production can only be based on experience, and problems cannot be attributed reliably.
Our company does not perform lamination. We only do die-cutting, creasing, and gluing. Do we need to care about GB 4806.15?
It depends on whether the gluing adhesive contacts food. Ordinary structural gluing, such as bonding a lid to a carton when the product does not contact the adhesive layer, usually does not involve a food-contact adhesive. However, several situations require immediate confirmation with the customer: the adhesive directly contacts food contents; the customer is obtaining overall packaging certification for a food-grade product and includes the gluing process in the review; or the customer is a brand owner whose supplier audit requests a complete list of all adhesives. Asking early is far less costly than trying to obtain reports after the fact.
The customer provided only an adhesive test report and said this was sufficient for compliance. Is it?
It is not sufficient, but the missing element is the level of verification. An adhesive test report represents material qualification and proves that the adhesive may be used for food contact. What the customer actually needs to confirm is whether the finished laminated product that contacts food complies. This requires a food simulant migration test on the finished product. Many customers assume the former is sufficient because paper and plastic previously had separate standards while the adhesive layer remained unclear. GB 4806.15 now addresses that layer separately. We recommend listing two items separately in the quotation: the material report, which the customer provides, and finished-product verification, including who conducts it, the cost, and the required time.
Who is responsible when a composite package exceeds the migration limit?
First determine which layer exceeded the limit. If it is the adhesive layer, the root cause usually falls into two categories: the adhesive used was outside the scope of the report, such as after changing suppliers or grades, or the process deviated from the adhesive manufacturer's instructions because of insufficient coating weight or inadequate curing. The former is a material-selection issue for which the supplier is responsible. The latter is a process-execution issue for which the laminating company is responsible. A third possibility is that the report does not correspond to the actual material used. Contractually, this is often treated as an error in customer-provided technical documentation, but batch records are needed to establish the facts. Recording the correct linkage among material grade, batch, and report number from the outset is the most effective way to protect the company.
Can we print an environmental or safety claim on the package if the adhesive complies with GB 4806.15?
These are not the same thing. GB 4806.15 is a food safety standard, not an environmental standard or a standard for making brand claims. Printing wording such as food grade or worry-free safety is a regulated claim and must be assessed according to the exact wording and intended use. Systems such as ISO 14021 and GB/T 18455 address environmental claims. In practice, some customers receive a food-grade report and then want to add a food-grade adhesive statement to the package. This can be challenged in export orders because food-contact compliance is a material property and does not automatically authorize public claims. Any wording printed on the package should follow a separate claims-review process rather than being added merely because the material is compliant.
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