A key step in the quality control inspection of a diaper is to ensure that the fiber/polymer ratio in the absorbent pad is acceptable. Manufacturers has consistently proven that the fiber to particle ratio will be in the range of 75:25 to 90:10. Another step is to ensure the size and distribution of these particles are acceptable. A particle size larger than 400 microns work well with the fibers. If the particles vary outside this acceptable range, gel blocking will occur.
Gravimetric Absorbency Test
The Gravimetric Absorbency Test evaluate the Absorbance Under Load (AUL). Absorbance Under Load is described as 0.9% saline solution absorbed by fibers while having subjected the diaper to pressure to 21,000 dynes. If a diaper has a total of 24 ml/g absorbency after 60 minutes, then the diaper passes the gravimetric absorbency test.
Other quality control inspection factors are geared towards the diaper's comfort and fit. Melting characteristics of the fabrics used to form the diaper's shell are tested for quality. A final test for the alignment of the diaper and all the components to the diaper must be inspected to rule out issues such as leakage.
Diaper manufacturers in China are not obligated by law to list the ingredients used to manufacture their diapers. Main documents such as MSDS sheets (material safety data sheets) are not needed for diapers however diapers include the main ingredients listed in personal-care products, which are obligated to list the ingredients. Ensure when importing from China, that you have the proper diaper inspection and quality control tests performed by a quality control specialist.
