Flow guide layer for sanitary napkins or diapers

Abstract

The invention relates to the technical field of sanitation, in particular to a flow guide layer for sanitary napkins or diapers. The flow guide layer comprises a diffusion layer, diffusive sponge layers, a one-way liquid guide membrane and hydrophobic sealing edges, wherein multiple inclined pores with inclination angle of 125-165 degrees are circumferentially formed in the diffusion layer, and the diffusion layer is located above the diffusive sponge layers; multiple diffusive sponge layers made of polyurethane sponge are stacked, and longitudinal pores and transverse pores are formed in the polyurethane sponge; the one-way liquid guide membrane is arranged at the bottom of the diffusive sponge layers; the hydrophobic sealing edges are bonded to edges of the multiple diffusive sponge layers through hot melt adhesive. The invention provides the flow guide layer which is used for sanitary napkins or diapers and has simple structure, low price and excellent diffusion performance to solve technical problems.

Description

Technical field [0001] The present invention relates to the field of sanitation technology, and in particular to a flow guide layer used for sanitary napkins or diapers. Background technique [0002] The guide layer is a layer of special non-woven material located between the surface layer of the diaper or sanitary napkin and the absorbent core. Its function is to make the diaper absorb liquid quickly, effectively and evenly, and avoid the excessive local absorption of SAP in the past. Form blocking phenomenon, reduce the amount of re-infiltration of diapers. [0003] At present, non-woven materials such as hot air, spunbond, and hot-rolled are commonly used in the guide layer. Although the price of hot air non-woven materials is slightly higher, because of its certain thickness and bulkiness, it can temporarily store liquids more than 10 times its own mass. It has excellent anti-reverse seepage and is widely used. [0004] Foreign companies such as Kimberly-Clark, Procter & Gamble...

AI Technical Summary

Problems solved by technology

[0005] However, some existing low-cost diversion layers often have poor diversion effects, and the liquid cannot diffuse well in the diversion layer, resulting in liquid diffusion mainly occurring in the core layer, and the core layer absorbs too much liquid locally to form a gel Blockage increases the difficulty of the second and third liquid infiltration, resulting in a large amount of back seepage; and the high-quality diversion layer is generally expensive due to the high price of raw materials and complicated manufacturing process

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