The main raw materials for sanitary napkins include
Surface material: usually made of non-woven fabric or perforated film, soft and breathable, capable of quickly absorbing liquids.
Absorbent core layer: composed of fluff pulp and polymer absorbent resin (SAP), responsible for absorbing and locking liquids.
Bottom material: Waterproof breathable film or non-woven fabric is usually used to prevent liquid leakage.
Adhesive: Used to fix the structure of sanitary napkins and stick them to underwear.
Release paper: Protect the backing adhesive and tear it off when in use.
Packaging material: Used for packaging single or multiple sanitary napkins.
Production process
(1) Surface material treatment
Non woven fabric or perforated film is cut and shaped by mechanical equipment to form the surface layer of sanitary napkins.
The surface material needs to be disinfected to ensure hygiene and safety.
(2) Production of absorbent core layer
The fluff pulp and polymer absorbent resin (SAP) are mixed in proportion and formed into an absorbent core layer through air flow molding technology.
The absorbent core layer is the core part of sanitary napkins, which determines the absorption capacity and water locking performance.
(3) Composite molding
The surface material, absorbent core layer, and bottom material are composite together through hot pressing or ultrasonic technology.
During the composite process, ensure that each layer of material is tightly adhered to avoid delamination or deformation.
(4) Adhesive backing and release paper bonding
Apply adhesive on the bottom layer of sanitary napkins to secure them to underwear.
Attach release paper to protect the adhesive from contamination.
(5) Cutting and Forming
Cut the composite material according to the shape of the sanitary napkin (such as wing shaped or straight strip shaped).
The edges of the cut sanitary napkins need to be sealed to prevent fiber detachment.
(6) Packaging
Single or multiple sanitary napkins are packaged using an automatic packaging machine.
Packaging materials usually have brand logos, usage instructions, and production information printed on them.
(7) Sterilization and quality inspection
Packaged sanitary napkins need to be sterilized to ensure product sterility.
The quality inspection process includes absorption performance testing, compression testing, appearance inspection, etc., to ensure that the product meets the standards.
Quality control and standards
Absorption performance: Test the absorption speed and water locking ability of sanitary napkins.
Breathability: Ensure comfortable use and avoid stuffiness.
Safety: The material is non-toxic and harmless, and meets hygiene standards.
Durability: Not easily deformed or damaged during use.
Environmental Protection and Sustainable Development
In recent years, many sanitary napkin brands have begun to pay attention to environmental issues, launching sanitary napkins made of biodegradable materials to reduce their impact on the environment. For example:
Use biodegradable non-woven fabrics and packaging materials.
Reduce plastic content and use plant-based materials.