Four-layer underpads: this design resembles 3-layer underpads from other manufacturers, fluff pulp is not covered with a second layer of sanitary tissue paper on top, the embossing is not distinct. Underpads of this type are usually somewhat softer to the touch. In such a design, polymer additives are not used, since there is no upper layer of paper fixing them.
Composition:
1. Coating layer: hydrophilic nonwoven material.
2. Absorbent layer: fluff pulp.
3. Supporting layer: sanitary-hygienic tissue paper, on which pulp is laid out.
4. The lower layer that protects against leakage: PE film.
Scheme of 4-layer products:
1. Coating layer: nonwoven material
2. Absorbent layer: fluff pulp
3. Supporting layer: sanitary tissue paper.
4. Protective layer: PE film