To ensure the safety and reliability of cable paper drums during transportation, storage, and use, the following quality requirements standards are formulated, covering key aspects such as raw materials, processes, performance, and inspection:

1、Raw material requirements

Substrate selection

Use high-strength kraft paper or recycled paper (in accordance with GB/T 13024 standard), with a weight of ≥ 180g/m ² and a moisture content controlled between 8% and 12%.

The adhesive must be environmentally friendly water-based adhesive (formaldehyde emission ≤ 0.1mg/m ³), with a bonding strength of ≥ 1.5N/mm ².

Supplementary materials

The metal reinforcement ring needs to be galvanized (thickness ≥ 0.05mm), and the rust prevention level should reach ASTM B117 standard.

The bottom tray should be made of multi-layer composite cardboard (pressure resistance ≥ 800kg) or plastic material (compliant with ROHS directive).

2、Process and structural requirements

Rolling process

The wall thickness of the paper tube is uniform (tolerance ± 0.2mm), with at least 5 layers and no bubbles, wrinkles, or delamination.

The overlapping width at the seam is ≥ 15mm, and the spiral winding process is used. The seam strength is ≥ 90% of the tensile strength of the base paper.

dimensional accuracy

The inner diameter deviation is ≤± 1mm, and the height deviation is ≤± 2mm (according to customer drawing requirements).

Roundness error ≤ 1.5 ‰, ensuring no jamming during cable winding.

3、Performance indicators

mechanical properties

Compressive strength: The upright pressure bearing capacity of an empty bucket is ≥ 300kg (without deformation for 24 hours).

Drop test: After a free fall from a height of 1.2m (with the bottom touching the ground), the barrel remains intact without any cracks or deformations.

environmental adaptability

After humidity cycling test (40 ℃/90% RH → 25 ℃/50% RH, 3 cycles), the paper drum showed no softening or mold growth.

High temperature stability: After being stored at 80 ℃ for 4 hours, the dimensional change rate is ≤ 1%.

4、Inspection and identification

Factory Inspection

Full inspection items: appearance, size, and joint strength.

Sampling items (batch 5%): Compression and drop tests (GB/T 4857.5).

Identification standards

The barrel body should be clearly labeled with the production date, batch number, maximum load capacity (such as MAX 250kg), and environmental protection label (recyclable label).

5、Packaging and Storage

Stacking layers ≤ 8 layers (including pallets), avoid outdoor storage, moisture-proof and sun proof.

During transportation, it is necessary to fix it with wrapping film to prevent rolling and collision.

Appendix: This requirement is formulated in accordance with ISO 2226:2010 "General Standard for Packaging Paper Containers" and industry practices. Suppliers must provide SGS material safety reports and batch quality inspection certificates.

By meeting the above standards, it can be ensured that the cable paper drum achieves industry-leading levels in protecting cable integrity, facilitating handling, and sustainable utilization.