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How to improve the water absorption performance of diapers?Posted: 30 November 2021

If you want to produce diapers, what raw materials should be purchased? Where should I buy raw materials? First of all, we should understand what diapers are, the components and raw materials of diapers. Suntech analyzes the principle, technology and raw material suppliers of diapers with you.


Diapers are commonly used daily necessities for babies, and are collectively referred to as diapers, diapers, and pull-up pants. Dry diapers can keep babies sleeping all night. Because of their strong water absorption, they are commonly called "diapers".

Diaper component


Modern diapers generally consist of three main parts: surface covering layer, absorbent core layer and base fabric. The surface coating layer is close to the baby's body, which can promote the rapid penetration of urine and effectively prevent back seepage, keeping the surface of the diaper dry.Surface coating


The diapers on the market are basically a non-woven surface layer. The breathable non-woven fabric can increase the degree of air permeability inside the diaper. Water vapor can circulate outside the diaper to discharge moisture and heat in time, effectively reducing the chance of eczema, and it is soft and comfortable. Does not irritate the skin.


Absorbent core


This layer is mainly able to capture and quickly absorb urine, disperse urine or diffuse it into the entire core layer through capillary action, and finally absorb and store urine. The absorbent core layer of diapers in the domestic market is mainly composed of pure wood pulp (fluff pulp) and super absorbent resin (SAP) to form a layered structure.


Backing part


Many diaper bottom fabrics have used non-woven fabrics that feel more comfortable, but due to the high price, many diaper bottom fabrics are still mainly composed of PE film.An important raw material for diapers


It can be seen that the main raw materials of diapers are non-woven fabrics and super absorbent resin (referred to as polymer SAP), and the water absorption of diapers mainly depends on the quality of SAP.


Super absorbent resin (short for polymer SAP) is an excellent material for making baby diapers. It is made of starch and acrylate as the main raw materials. The outstanding feature of "diapers" is the surprisingly large capacity of water absorption and storage. The absorption of normal saline is 40-60 times of its own weight, and the absorption of purified water is 50-100 times of its own weight. Therefore, children do not have to worry about diapering their trousers, as the urine will be "drinked" by them, commonly known as "diapers."


Once absorbed, they do not subsequently release it. They are therefore an ideal material for use in products which are designed to contain fluids such as baby diapers/nappies, incontinence products, and feminine hygiene pads and liners.


The majority are made of sodium polyacrylate and available in granular form or as fibers. The granular material is a polymer made up of millions of identical units of sodium acrylate formed into a chain-fence like structure. These are then linked together to make the material into a three-dimensional network. In their dry state the long polymer chains are coiled. When they absorb liquid, they uncoil, and the network expands. The liquid is then stored in the spaces in the molecular network and the material forms a gel which locks the liquid in.The safety of superabsorbent polymers


Superabsorbents are safe for use in absorbent hygiene products. They have been extensively tested and researched. Scientists and doctors alike have reviewed the research and confirm that superabsorbent material is safe.


Superabsorbents have a proven history of safe use and their benefits have been widely recognised by experts in toxicology, general medicine, nursing and paediatrics. The use of superabsorbent polyacrylates in personal hygiene products has brought considerable health, hygiene, environmental and lifestyle benefits to the carers and people using these products.How are superabsorbent polymers made


The main ingredients are acrylic acid, sodium hydroxide (or a similar neutralizing agent) and water plus a cross linker which forms the bridge that links one polymer chain to another.


This solution is mixed together and undergoes a polymerisation process to form the three-dimensional networks of polymer chains. This takes the form of an aqueous gel.


The granules are ground and sieved to the desired particle size. At this point the superabsorbent material can be further cross linked to give the material specific absorbency characteristics.Where can I buy SAP, the raw material for diapers?


The companies that provide SAP mainly include the following (including links):


Arkema (SAP), FR


Banglida (SAP), CN


BASF (SAP), US


Danson (SAP), CN


Degussa-Evonik Superabsorbent (SAP), DE


Evonik Industries (SAP), DE


Formosa Plastics Cor. (SAP), TW


Incopack (SAP), CO


KAO (SAP), JP


LG Chem (SAP), Korea


Mc Airlaid’s (SAP airlaids), DE


Nanning Qiaohong (air laid SAP), CN


Recyc PHP (Re-Claimed SAP), CA


Nippon Shokuby Chemical (SAP), JP


Sanyo Chemical (SAP), JP


Shandong Zenuochem Technology (SAP), CN


Summit Enterprise C. Ltd. (SAP Trader), CN


Sumitomo Seika (SAP), JP


Yixing Danson Technology (SAP), CN


Suntech manufactures intelligent diapers machine according to the standard of "Seiko Intelligent Manufacturing", which effectively improves the production speed, output and quality of diapers, and facilitates the production of diapers. Welcome to inquire in detail.



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