Lotioned Fibrous Structure Pattern for Lotion Transfer and Sheet Control
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Solution Overview
Problem
Existing fibrous structures, such as sanitary tissue products, face challenges in achieving improved lotion transfer and better sheet control during papermaking, with prior attempts leading to sheet width narrowing (necking) due to continuous knuckle networks and discrete pillow regions.
Innovation Solution
The development of fibrous structures with a surface pattern comprising a continuous knuckle region and a plurality of discrete pillow regions, where the pillow regions are non-parallelly juxtaposed and have specific dimensions and orientations, is achieved using patterned molding members like resin-containing belts, resulting in improved lotion transfer and reduced necking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous knuckle network with discrete pillow regions is used to improve lotion transfer, then lotion transfer is improved, but sheet width narrowing (necking) occurs during papermaking
Solution Approach 1:
The continuous knuckle network is segmented into discrete knuckle regions by introducing through-air-drying (TAD) fabric patterns that create isolated knuckle zones rather than continuous networks. This segmentation allows the fibrous structure to maintain lotion transfer properties at discrete locations while reducing the overall constraint on sheet width during manufacturing, thereby eliminating necking.
Solution Approach 2:
The invention applies different structural qualities to different regions of the fibrous structure by using TAD fabric patterns that create localized knuckle regions. Instead of a uniform continuous network, the knuckles are concentrated in specific areas defined by the TAD fabric geometry, allowing lotion transfer to occur at these localized zones while other regions provide structural support without causing necking.
2Reliability
If discrete pillow regions are added to the fibrous structure surface, then lotion transfer is enhanced, but the structure complexity increases
Solution Approach 1:
The TAD fabric serves multiple functions simultaneously: it defines the knuckle region patterns, controls the drying process, and creates the desired surface topology. By using a single component (the TAD fabric) to achieve multiple objectives, the invention avoids the complexity that would arise from adding separate discrete pillow regions as additional structural elements.
Data Source
AI summary
Fibrous structures having a surface pattern of a continuous knuckle region and a plurality of discrete pillow regions such that the fibrous structures exhibit improved lotion transfer compared to known fibrous structures and better sheet control during the making of such fibrous structures are provided.