In the production process of diapers, glues are required to bond the surface nonwoven fabric, absorbent core, PE composite backing film, and many other materials to ensure that the overall structure and performance of the diaper is stable. These glues usually have good bonding strength and speed to ensure a tight fit between the various layers of diaper materials and prevent urine penetration and side leakage.
Structure of diapers
The current diaper structure is generally four-layer structure:
| Functional layer | Material |
| Top layer | Nonwoven fabric |
| Conductive layer | Specialized nonwoven |
| Absorbent core layer | Tissue paper + fluff pulp + SAP |
| Bottom layer | PE film or PE film + nonwoven fabrics |
The top layer is in direct contact with the baby's skin, accepting the liquid and transferring it. The surface layer has high requirements for the material, which is soft to the touch and does not irritate the baby's skin.
The conductive layer is the most important item in thin or ultra-thin diapers. The conduction layer transmits the liquid received by the surface layer towards the absorbent layer, this layer is required to be able to provide a large enough space to store and transmit a sufficient amount of liquid as quickly as possible.
The absorbent core layer, is the most important functional layer in a diaper.
The function of the bottom layer is to prevent leakage, and the composite bottom layer that is now commonly used is a diaper that has a more cloth-like texture and a better feel.
There are many types of hot melt adhesives available in the market, including but not limited to transparent pressure-sensitive adhesives, high tack hot melt adhesive blocks, diaper-specific hot melt adhesives, etc. All of these hot melt adhesive products are able to meet the different needs of diaper production.
Materials required for diaper production
The general general-purpose materials for diapers are mainly non-woven fabrics, infusion layer, tissue paper, SAP, bottom film, rubber root, adhesive sticker (front + left and right), waistband elastic, etc.
1. Nonwoven fabrics: the functional classification of nonwoven fabrics used for diapers is becoming increasingly refined. Surface layer hydrophilic nonwoven fabric, enterprise body water-resistant nonwoven fabric, penetration layer nonwoven fabric.
2. Adhesive: Plastic adhesive tape (ordinary - silent) - non-woven adhesive tape - Velcro.
3. SAP: the proportion of SAP in the core body is a growing trend, initially below 10%, and now generally about 30%-40%, individual up to 70%.
4. Base film: PE film or PE film + non-woven fabric.
5. Film: ordinary film - breathable film - breathable composite film.
Adhesive for diapers
The following parts of the diaper production process require the use of glue：
- Material bonding: In the production process of diapers, glues are needed to bond the surface nonwoven, absorbent core, PE composite backing film, and many other materials to ensure that the overall structure and performance of the diaper is stable. These glues usually have good bonding strength and speed to ensure a tight bond between the various layers of materials in the diaper, preventing urine penetration and side leakage.
- Semi-finished and finished products: Glues may also be required at the semi-finished and finished product stages, such as for transferring semi-finished products from one process to the next, or for gluing finished diapers when they are packaged.
The use of these glues ensures the quality and safety of the diaper and provides a comfortable wearing experience for the baby.
Supply Chain Provision
The production of diapers is more demanding, if you have the idea of producing diapers and happen to need to look for equipment and raw materials, you can contact us at any time, we have a large supply chain system, which can save you time and communication costs.
