The testing procedures for hot melt adhesives used in baby diapers and adult incontinence products are highly consistent, focusing on adhesive performance, thermal stability, environmental safety, and hygiene indicators to ensure product safety and reliability in complex usage environments.
Although the target users of "baby" and "adult" products differ, their hot melt adhesives both play crucial roles in structural bonding, elastic band fixation, and leak-proof adhesion. Therefore, the testing standards and procedures are largely the same, primarily based on standards such as HG/T 3948-2025, GB/T 15332, and GB/T 2792.
Environmental and Hygiene Indicator Testing: Safeguarding User Health and Safety
Microbiological Testing
Tested according to GB/T 15979-2002 standard:
Total bacterial count ≤ 1000 CFU/g
Coliforms, Pseudomonas aeruginosa, pathogenic pyogenic bacteria: Not detectable
Total fungal count ≤ 100 CFU/g
Chemical Safety Testing
Migrationable fluorescent substances: Not detectable; avoid long-term exposure to prevent interference with cell metabolism.
Formaldehyde content: ≤75 mg/kg; excessive amounts may cause sensitization and cancer.
VOC emission: The new standard HG/T 3948-2025 will specify limits, promoting the application of low-odor, low-emission formulations.
Heavy metals (lead, cadmium, mercury, chromium, etc.): Complies with REACH, RoHS, and other regulations.