Introduction: diaper is an absorbent core composed of wood pulp and polymer absorbent resin, as well as non-woven fabric and adhesive. Consumers' requirements for diapers are that babies will not leak, absorb water and retain water when wearing them, so as to make the baby's skin surface dry and comfortable. The performance index requirements of diaper manufacturers for diaper products are mainly reflected in water retention performance index, penetration speed, liquid diffusion and leak proof. The raw materials of diapers have different contributions to each performance index of diapers. For example, the non-woven fabric of the surface guide layer has a great impact on the penetration speed and liquid diffusion range, and the polymer water absorbent resin has a great impact on the diaper permeability index, and about 70% of the contribution comes from the absorbent resin. Let's take a look at the specific performance indicators of SAP.

Performance index of polymer water absorbent resin

The emergence of polymer water absorbent resin has promoted the revolution of the use and production of diapers. Due to its high water absorption and good water retention performance indicators, modern disposable diapers not only bring convenience to the mother, but also bring dryness and comfort to the baby.

Absorption rate

It shows the maximum uptake of polymer water absorbent resin in a certain period of time. The usual data is the amount of normal saline absorbed by 1g polymer water absorbent resin in 30s, 60s or 180s.

Intake

It shows the maximum amount of normal saline absorbed by 1g polymer water absorbent resin.

Intake under pressure (0.70pa): indicates the maximum intake of 1G polymer water absorbent resin under the pressure of 0.7pa. This is because babies sit or lie down in many cases, and then urine is usually absorbed under the pressure of the human body. This test method is to simulate and understand the absorption of absorbing resin under pressure.

Water retention

It shows that 1g polymer water absorbent resin can maintain the maximum amount of normal saline after 1400 revolutions of centrifugation. This means that the high absorption resin can really maintain and fix the amount of normal saline.

Proportion and particle distribution

It shows the proportion, particle size and distribution of polymer water absorbent resin.

These characteristics have different contributions to the performance indicators of diapers, so we don't think high data must be a good product, but relatively speaking, water retention and absorption under pressure are more important.