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How the diapers are tested?

# Diapers

You are not unfamiliar with diapers, but you certainly don't know whether a diaper is qualified, dry or clean, and how it is tested, right? Next, I will take you to know several ways to detect diapers.

1. Microbial detection.

The test room needs to be sterilized by ultraviolet rays for half an hour first, and then the tester takes 10 grams of samples with scissors, immerges them in normal saline for a while, takes them out and puts them into the medium.

Testing personnel said that the medium is equivalent to the vegetative environment of plant growth, including fungal medium, pathogen medium, solid medium and liquid medium. The culture medium is then placed in an incubator at different temperatures to allow the bacteria to grow in the appropriate environment.

After a certain time, the detection personnel take out the culture medium, detect and observe with professional tools, find out where the bacteria grow, and determine whether the quantity exceeds the standard.

2. Chemical detection.

Mainly test the water content and pH value of diapers. The testers soaked the sample in a container of saline and stirred it. After about 10 minutes, a professional instrument is placed inside and the pH is judged to be excessive. According to the national standard, the pH value between 4 and 8 is qualified products.

3 Physical check.

Physical detection is relatively simple, including appearance, deviation, and permeability. Deviation also includes size deviation and weight deviation; Permeability includes sliding leakage, backflow and leakage.

To test the amount of slip, the tester places the diaper side on the tester, pours the saline solution from above, and places the container under the diaper. If salt water is dripped into the container through the diaper, it is not qualified. The amount to be poured depends on the diaper model. 80ml for a large diaper, 60ml for a medium and 40ml for a small.

Seepage and leakage are tested together. The tester placed the diaper on a weighing paper, then poured saline over the diaper, then placed the weighing paper on top and held it down with an object. The proportion of the amount poured is the same as the amount of slip tested.

The examiner said the saline was poured twice, five minutes after the first. After 5 minutes, place the test paper on top and press it for a minute before lifting it. After that, weigh the upper and lower test paper respectively. The water weight minus the pre-test weight will determine whether the return flow and leakage are qualified. The bottom dipstick measures leakage and the top dipstick measures flow back.


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