GB/T 3198-2020Aluminium and aluminium alloy foils (English PDF)

3.1 Product Classification

3.1.1 The designations, states and dimensions of aluminum foils are shown in Table 1. When the demand-side demands other designations, states and dimensions, the demand-side and the supply-side shall negotiate and determine them; indicate them in the order form (or contract). of Coil

3.1.2 Aluminum foils are classified into single-sided glossy aluminum foils and double- sided glossy aluminum foils. The demand-side shall indicate in the order form (or contract) the delivery by single-sided glossy aluminum foils or double-sided glossy aluminum foils. Single-sided glossy aluminum foils shall be rolled out with the bright side facing out for delivery. When they are required to be delivered with the dark side facing out, it shall be negotiated and determined by the demand-side and the supply- side; indicated in the order form (or contract).

3.2 Chemical Composition The chemical composition of aluminum foils shall comply with the stipulations of GB/T 3190.When there are special requirements for chemical composition, the demand- side and the supply-side shall negotiate and determine them; indicate them in the order form (or contract).

4.2 Dimensional Deviation

4.2.1 Dimensional rounding-off Inner Diameter of Core Allowable Deviation of Inner Diameter Rounding-off is not allowed in the measured value of dimensions. The determination method of limit values shall comply with the stipulations of GB/T 8170.

4.2.2 Local thickness The local thickness of aluminum foils shall be measured by an instrument that can ensure the accuracy of inspection. The thickness determination method of aluminum foils whose thickness is less than 0.1000 mm shall comply with the stipulations of GB/T 22638.1.

4.2.3 Average thickness Average thickness shall be calculated in accordance with Formula (1).

4.2.4 Other dimensions Other dimensions of aluminum foil shall be measured by tools or instruments that can ensure corresponding accuracy.

4.3 Room-temperature Tensile Mechanical Properties The room-temperature tensile mechanical property test of aluminum foils shall be conducted in accordance with the methods stipulated in GB/T 16865.

4.4 Pinhole Pinholes of aluminum foils shall be inspected in accordance with the methods stipulated in GB/T 22638.2.The test method of online pinhole inspection shall be negotiated and determined by the demand-side and the supply-side; indicated in the order form (or contract).

4.5 Stickiness The stickiness of aluminum foils shall be inspected in accordance with the methods stipulated in GB/T 22638.3.The arbitration inspection method shall comply with the overall inspection method stipulated in GB/T 22638.3.

4.6 Surface Wetting Tension The surface wetting tension of aluminum foils shall be determined in accordance with the methods stipulated in GB/T 22638.4.The arbitration inspection method shall comply with the wiping method stipulated in GB/T 22638.4.

4.7 Wettability The wettability of aluminum foils shall be inspected in accordance with the methods stipulated in GB/T 22638.5.The arbitration inspection method shall comply with the wiping method stipulated in GB/T 22638.5.

4.8 DC Resistance The DC resistance of aluminum foils shall be determined in accordance with the methods stipulated in GB/T 22638.6.In terms of the DC resistance of aluminum foils, the supply-side may adopt a blank (the surface of the sample shall be clean and free of oil marks) with a specified thickness (generally,

0.25 mm ~

0.36 mm) to test the DC resistance as the test result of the aluminum foils.

4.9 Heat Seal Strength The heat seal strength of aluminum foils shall be determined in accordance with the methods stipulated in GB/T 22638.7.

4.10 Bursting Strength The bursting strength of aluminum foils shall take the stipulations of GB/T 454 as a reference.

5.1 Inspection and Acceptance Inspection

5.1.1 The products shall be inspected by the supply-side, which shall ensure that product quality complies with the stipulations of this Standard and the order form (or contract). In addition, a quality certificate shall be filled out.

5.2 Group Batch Products shall be submitted for acceptance inspection in batches. Each batch shall be constituted of products of the same designation, state and dimensions. The batch weight is unlimited.

5.3 Weighting Products shall be inspected and actually weighed (unless it is otherwise agreed by the supply-side and the demand-side).

5.4 Inspection Items and Process Assurance Items Exit-factory inspection items, periodic inspection items and process assurance items shall comply with the stipulations in Table

12.The supply-side shall conduct periodic inspection at least once a year.

5.5 Sampling Product sampling shall comply with the stipulations in Table 13.

5.6 Determination of Inspection Result

5.6.1 When the chemical composition of any sample is disqualified, and the melting times can be distinguished from the products, then, the melting times represented by the sample shall be determined as disqualified; the remaining melting times shall be successively inspected, and the qualified ones shall be delivered. When the melting times cannot be distinguished, then, this batch of products shall be determined as disqualified.

5.6.2 When the dimensional deviation of any product is disqualified, then, this coil of product shall be determined as disqualified.

5.6.5 When the stickiness, surface wetting tension and wettability of any product are disqualified, from this batch (furnace) of products (including the disqualified product), take a double size of samples to re-conduct the inspection. If the re-inspection results are all qualified, then, this batch (furnace) of products shall be determined as qualified. If the re-inspection results are still disqualified, then, this batch (furnace) of products shall be determined as disqualified. When the supply-side and the demand-side agree to allow the supply-side to conduct per-coil inspection, the qualified ones shall be delivered.

5.6.6 When the DC resistance of any product is disqualified, and the melting times can be distinguished from the products, then, the melting times represented by the product shall be determined as disqualified; the remaining melting times shall be successively inspected, and the qualified ones shall be delivered. When the melting times cannot be distinguished, then, this batch of products shall be determined as disqualified.

5.6.8 When the bursting strength of any product is disqualified, then, this batch of products shall be determined as disqualified. When the supply-side and the demand- side agree to allow the supply-side to conduct per-coil inspection, the qualified ones shall be delivered.

5.6.9 When the connector of any product is disqualified, then, this coil of product shall be determined as disqualified.

5.6.10 When the core of any product is disqualified, then, this batch of products shall be determined as disqualified. However, per-coil inspection is allowed, and the qualified ones shall be delivered.

5.6.11 When the appearance quality of any product is disqualified, then, this coil of product shall be determined as disqualified.

6.1.1 Product marking

6.1.1.1 On each coil of product that is qualified in the inspection, there shall be marking (or labeling). The content of the marking is as follows:

6.2 Packaging, Transportation, Storage The packaging, transportation and storage of products shall comply with the stipulations of GB/T 3199.When the demand-side requests to use steel brackets, cardboard packaging boxes, paper and wood packaging boxes for packaging, or has special requirements, they shall be negotiated and determined by the demand-side and the supply side; indicated in the order form (or contract).