Controlling the shrinkage of polymers for customized shoe sole manufacturing

Amaro, Walter; Diviani, Luca; Montorfano, Davide; Oberrauch, Ermanno; Depinto, Gabriele; Segalini, Simona; Levi, Marinella; Turri, Stefano

doi:10.1080/0951192042000273203

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The shrinkage values for the PVAc/PFW 5%–20% samples decreased (0.75%–0.45%), with a greater drop for the PVAc/PFW 20%, a reduction of ~46% in relation to the sample without PFW. According to Amaro et al, [ 47 ] shrinkage of a polymeric material for footwear can be affected by composition (type of polymer and additives) and processing (molding and post‐molding conditions), and is likely to affect other properties of the sole, such as hardness, which, for comfort reasons, should not be too high or too low.…”

Section: Resultsmentioning

confidence: 99%

Composite for insole shoe assembly based on polyvinyl acetate and polyester fabric waste from the footwear industry

2022

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This work aimed at studying a composite material for shoe assembly insole using polyester fabric waste (PFW) from the footwear industry. For the preparation of the composites, polyvinyl acetate (PVAc) was employed as the polymeric matrix, with 5%, 10%, 15%, and 20% in weight of PFW in the formulations and compared with a standard formulation without PFW. The samples were characterized via physical–chemical (moisture content, bulk density, and growth/shrinkage) and mechanical (break, tensile and dry, and wet tear) analyses, and also by scanning electron microscopy. The PVAc/PFW 5% and 10% composites showed satisfactory results in all tests performed. They reached 9.99 and 9.09 MPa tensile strength, respectively, twice the minimum acceptable (5 MPa), and 1.13 and 1.07 N/mm dry tear strength, also higher than required (1.0 N/mm). The better results for the samples with less PFW were justified by the lower tendency to produce agglomerates during the molding and compaction production stages. Compared with commercial materials commonly used in shoes, these samples met all specifications and showed the technical feasibility of reusing PFW in assembly insoles.

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Section: Resultsmentioning

confidence: 99%

Composite for insole shoe assembly based on polyvinyl acetate and polyester fabric waste from the footwear industry

2022

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“…In research papers about improving the quality of polyurethane soles [6][7][8], it was observed that eight factors have a significant impact on product quality. These factors and their selected levels are shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Robust Design in Generalised Linear Models for Improving the Quality of Polyurethane Soles

Mares

Domínguez

2015

SAJIE

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In a process that manufactures polyurethane soles by casting, a number of problems lead to different types of defects on the sole, causing significant economic losses for the company. In order to improve the product quality and decrease the number of defects, this study conducts an experimental design in the context of robust design. Since the response variable is binary, the statistical analysis was performed using generalised linear models. The operational methodology reduced the percentage of defects, while combining the experimental technique and control systems to achieve superior quality and a consequent reduction in costs. OPSOMMING'n Groot aantal probleme word in 'n poliuretaansoolgietproses ervaar en dit lei tot verskillende defekte in die sool. Hierdie defekte veroorsaak noemenswaardige verliese vir die maatskappy. Om die produk gehalte te verbeter en die aantal defekte te verminder word 'n eksperimentele robuuste ontwerp uitgevoer. Aangesien die reaksieveranderlike binêr is, is veralgemeende lineêre modelle vir die statistiese analise gebruik. Die operasionele metodiek het die persentasie defekte verminder en die eksperimentele tegniek en beheerstelsels gekombineer om sodoende 'n hoër gehalte produk en 'n vermindering in kostes te verkry.

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Structure and property development during solidification of VOC compliant automotive refinish clearcoats

Jindal

Bhattacharya

Francis

et al. 2010

Progress in Organic Coatings

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Controlling the shrinkage of polymers for customized shoe sole manufacturing

Cited by 3 publications

References 1 publication

Composite for insole shoe assembly based on polyvinyl acetate and polyester fabric waste from the footwear industry

Composite for insole shoe assembly based on polyvinyl acetate and polyester fabric waste from the footwear industry

Robust Design in Generalised Linear Models for Improving the Quality of Polyurethane Soles

Structure and property development during solidification of VOC compliant automotive refinish clearcoats

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