Introduction
To ensure hand towels comply with the standards outlined in the “[Directory of Tissue Paper & Disposable Products [China] 2024/2025]([invalid url, do not cite]),” manufacturers must follow specific testing methods and inspection rules. These methods and rules are critical for producing high-quality commercial hand towels that meet quality and safety requirements.
Testing Methods
Hand towels must undergo the following key tests:
- Color Difference Testing: Using a colorimeter, testing at 180 ± 2 times per minute with a pressure of 100 ± 2 mm, calculating the average value (Attachment 5, B.1). This ensures uniform color with a color difference of ≤10 units.
- Thickness Testing: Using a thickness gauge to ensure a minimum thickness of 0.01mm (Attachment 5, B.2.1). This verifies compliance with the 0.02mm thickness requirement.
- Tensile Strength Testing: Using a tensile testing machine to ensure strength ≥100 ± 5 g (Attachment 5, B.2.1). This guarantees durability in wet conditions.
- Microbial Testing: Testing for total bacterial count (≤200 CFU/g), total fungal count (≤100 CFU/g), and no detection of pathogenic bacteria (e.g., Escherichia coli) (Attachment 5, A.5).
Inspection Rules
The directory specifies the following inspection rules (Attachment 7, 7.1):
- Factory Inspection: Includes appearance checks (for holes, wrinkles, etc.), first production batch inspection (within 6 months), production site change inspection, and inspection when there is a significant difference from the previous type inspection.
- Type Inspection: Covers D65 brightness, water absorption, absorption capacity, dustiness, ash content, and more (Attachment 7, Table 4).
The following table lists some inspection items (Attachment 7, Table 4):
| No. | Inspection Item | Factory Inspection | Type Inspection | Standard No. | Inspection Method Standard |
|---|---|---|---|---|---|
| 1 | Quantitative | ● | ● | 5.2.1 | 6.2 |
| 2 | D65 Brightness | ● | 5.2.1 | 6.3 | |
| 5 | Transverse Wet Tensile Strength | ● | ● | 5.2.1 | 6.6 |
| 8 | Holes | ● | ● | 5.2.1 | 6.9 |
Equipment Requirements
Multi-fold hand towel machines must be equipped with colorimeters, thickness gauges, and tensile testing machines to support these tests. These ensure compliance with standards like GB/T 10739 (Attachment 5, B.2.1).
Conclusion
By adhering to the testing methods and inspection rules of the “[Directory of Tissue Paper & Disposable Products [China] 2024/2025]([invalid url, do not cite]),” manufacturers can ensure consistent hand towel quality, meeting commercial demands.
