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Predicting web compression performance from fiber properties

IP.com Disclosure Number: IPCOM000243555D
Publication Date: 2015-Sep-30
Document File: 24 page(s) / 15M

Publishing Venue

The IP.com Prior Art Database

Related People

Ted Tower: AUTHOR

Abstract

Nonwoven webs are a critical component to many of KC's disposable absorbent articles. For example, some webs are responsible for fluid intake and distribution, and therefore must remain sufficiently open even under compressive loading. Material development can be accelerated by predicting functional web performance from experimental fiber data. A finite element model was developed to evaluate compression resistance of a non-woven web as a function of fiber properties. We will also outline examples of using an open-source computer graphics package, Blender, to more effectively communicate simulation results to the broader organization. With careful application, simple rendering approaches can help disseminate and market the use of simulation.

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Slide 1 of 24

Predicting web compression performance from fiber properties

Ted Tower

Kimberly-Clark Corporation

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© 2015 KCWW

Notes

Nonwoven webs are a critical component to many of KC's disposable absorbent articles.  For example, some webs are responsible for fluid intake and distribution, and therefore must remain sufficiently open even under compressive loading.  Material development can be accelerated by predicting functional web performance from experimental fiber data.  A finite element model was developed to evaluate compression resistance of a non-woven web as a function of fiber properties.

 

We will also outline examples of using an open-source computer graphics package, Blender, to more effectively communicate simulation results to the broader organization.  With careful application, simple rendering approaches can help disseminate and market the use of simulation.

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Slide 2 of 24

Lead the World in Essentials for a Better Life

43,000employees worldwide

$19.7 Billion in Net Sales in 2014

#1 or #2 share positionin 80 countries

Nearly one-quarter of the world’s population use ourproducts daily

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© 2015 KCWW

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Slide 3 of 24

Introduction

Non-woven webs play many functional roles in many K-C consumer products

For absorbent articles, different structures have different roles in fluid handling, such as:

  Barrier layer

  Distribution layer

  Long-term storage layer

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© 2015 KCWW

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Slide 4 of 24

Distribution Layer

Key Properties

  Fluid/interfacial (wetting/wicking)

  Structural (surface area, mechanical)

  Specific Surface Area (SSA)

  Void Volume under load (VV)

Challenge & Opportunity:

  Fiber architecture: materials, design

  Web architecture: fiber mix, bonding, orientation

Simulated Web

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© 2015 KCWW

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Slide 5 of 24

Modeling Fibrous Networks

Active research area

  2D/3D

  Natural/synthetic, bonded/unbonded

  Analytical models & affine assumptions

  Ostoja-Starzewski et al [‘89, ’00, ‘02]

  Random Fiber Networks (RFN)

  Picu et al [‘08-’13], many others

Relevant topics

  Scale & effective elasticity, deformation & failure, etc

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© 2015 KCWW

Notes

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Slide 6 of 24

Approach

Generate plausible web & bond

Simplify fiber representation

Virtual compression test

Sanity checks & validation

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© 2015 KCWW

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Slide 7 of 24

Geometry

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© 2015 KCWW

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Slide 8 of 24

Approximating the network

Cross-Section

Top

Random Fiber Network

Random-walk generation approach

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© 2015 KCWW

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Slide 9 of 24

Network Comparison

Cross-Section

Top

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© 2015 KCWW

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Slide 10 of 24

Bonding Geometry

Use geometric search to identify fiber reg...