Comfort Fitting Using Shape Memory Polymeric Foam

Wang, T. X.; Huang, Wei Min; Aw, Jia En; He, Ling; Vettorello, M.

doi:10.1520/jte20160011

Cited by 18 publications

(28 citation statements)

References 25 publications

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“…We have demonstrated that some commercially available polymeric materials can meet most requirements without any modification or with only some minor modifications [5]. On the other hand, we can develop new polymeric materials particularly for comfort fitting purpose with tailored thermo-mechanical properties, such as body-temperature programming to fix the temporary shape and rubber-like elasticity at both high and low temperatures.…”

Section: Advanced Shape Memory Technologymentioning

confidence: 99%

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Advanced Shape Memory Technology for Comfort Fitting

Wang¹,

Chen²,

Huang³

2017

Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017)

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Abstract. Nowadays, more and more people are keening to invest in their own personal fitness. Instead of producing customized products according to the actual dimensions of individuals, which could be highly expensive and complicate, advanced shape memory technology could be utilized to achieve one-size-for-all in a cost effective manner using well-established existing technologies. In this paper, first the concept of advanced shape memory technology is briefly introduced, together with the working principle. Some typical applications are presented here to demonstrate the potential benefits of this approach.

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Section: Advanced Shape Memory Technologymentioning

confidence: 99%

“…It can be concluded that a cost effective approach to realize comfort fitting, not only for shoes, but also for a range of other personal items, is highly in demand at present [5].…”

Section: Introductionmentioning

confidence: 99%

Advanced Shape Memory Technology for Comfort Fitting

Wang¹,

Chen²,

Huang³

2017

Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017)

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“…According to, for instance [4], most polymers are naturally heating/chemo-responsive SMM. In addition to continuous efforts to develop new SMMs [5][6][7][8][9][10][11][12][13][14][15][16], the SME in many engineering polymers has been systematically characterized and gradually utilized in some engineering applications [17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Responsive Shape-Memory Effect and Surface Features in Polycarbonate (PC)

Wang

Huang

et al. 2017

Applied Sciences

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The influence of programming strain and temperature on the shape memory effect and surface morphology in programmed polycarbonate (PC) samples via uni-axial stretching is investigated. It is found that the samples programmed at around the glass transition start temperature not only have micro-cracks on their surface, but also show a necking phenomenon. Furthermore, the surface of the necked area is concave, but the surface of the non-necked area is convex. On the other hand, despite the samples programmed at high temperatures being able to deform in a uniform manner at macroscopic scale, their surfaces are still uneven, either concave or convex. While the samples programmed at low temperatures are able to achieve full shape recovery, stretching at higher temperatures over the glass transition range to a higher strain may result in non-recoverable deformation.

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“…Dimensions of the sample for uni-axial tensile test (unit: mm). (Reproduced from(Wang et al, 2016a)) …”

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confidence: 99%

“…Typical stress vs. strain relationships in uni-axial tension to a maximum strain of 80% at three different temperatures followed by cooling back to room temperature and then unloading. (Reproduced from(Wang et al, 2016a))Figure 3.7 shows the stress vs. strain relationships in cyclic uni-axial stretching at room temperature in the samples with/without pre-stretching. Pre-stretching was conducted at 60°C to 30% maximum strain or 80% maximum strain.…”

mentioning

confidence: 99%

Elastic shape memory polymeric materials for comfort fitting footwear

Wang¹

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Nowadays consumers demand more and more comfort and functionality from their footwear, making these characteristics very important considerations in footwear design and evaluation. Both are the results between the nature of human body and different elements of the footwear. Although there are quite many different methods or ways to achieve better comfort fitting, for instance, via 3D printing, disadvantages are still quite obvious in available products in the market. Thus, in order to improve comfort fitting and provide a better solution to consumers, shape memory polymers are introduced. First, a commercially available polymer, namely ethylene-vinyl acetate (EVA) foam is investigated in terms of its shape memory effect (SME). It is concluded that this EVA foam can satisfy some but not all of the requirements for comfort fitting shoes. Since it is difficult to find an existing shape memory material that meets the requirements for comfort fitting footwear, both thermoset and thermoplastic shape memory hybrids (SMHs) programmable at around human body temperature with tailorable elasticity and stretchability are developed. The fitting time window for the thermoset version is over 10 minutes, while it is less than two minutes for the thermoplastic version. No similar materials have been reported so far. Additionally, some possible shoe designs are proposed and the enhanced stretchability via local structural design is investigated by finite element method (FEM). Subsequently, a few prototypes are fabricated and the feasibility to actualize comfort vi fitting shoes using developed materials is demonstrated. Although the shoe prototypes are only for the purpose of proof-of-concept, the demonstration successfully shows that the prototypes are deformable to fit different sized feet at around human body temperature. Such a kind of comfort fitting approach has yet been achieved using any other existing materials and technologies.

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Comfort Fitting Using Shape Memory Polymeric Foam

Cited by 18 publications

References 25 publications

Advanced Shape Memory Technology for Comfort Fitting

Advanced Shape Memory Technology for Comfort Fitting

Thermo-Responsive Shape-Memory Effect and Surface Features in Polycarbonate (PC)

Elastic shape memory polymeric materials for comfort fitting footwear

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