The raw materials of diapers usually include the following:

1. Absorbent layer material: mainly composed of polymer absorbent resin (SAP), which can quickly absorb urine and lock it to keep the baby dry and comfortable.

2. Surface layer material: usually breathable non-woven fabric or soft cellulose material, with high breathability and comfort.

3. Leak-proof layer material: made of polyethylene film, it can prevent urine from leaking out and keep the baby's clothes and bed dry.

4. Wetness indicator line: This is a special chemical formula that can change color under the action of urine to remind parents to change diapers.

5. Glue: used to bond the components of the diaper to ensure the firmness of the diaper structure.

6. Elastic leg band: usually made of elastic yarn or rubber band, used to fix the diaper on the baby's legs to prevent leakage.

In addition, diapers may also contain other auxiliary materials, such as softeners, fragrances, adhesives, etc., to improve the comfort, moisture absorption and odor control of diapers.

It should be noted that the raw materials used in different brands and types of diapers may be different, so the specific ingredients and proportions may vary.