Moisture Absorption and Shock Cushioning Behavior of Flexible Polyurethane Foam Filled with Saw Dust

2012 ◽  
Vol 626 ◽  
pp. 677-680 ◽  
Author(s):  
Syahidah M. Rum ◽  
Mohd Azlan ◽  
N.V. David

This paper presents the moisture absorption and shock cushioning properties of flexible polyurethane foams (PU) filled with saw dust fibers at 10, 15 and 20wt%. The compositeswere fabricated using open molded method from a two-part liquid foamsystem consisting of part-A (Isocyanate) and part-B (Polyol).The diffusion rates from the moisture absorption test is calculated using Ficks second law equation. Thesample with 10 wt% filler shows the highest diffusion ratewhile the lowest rateis sample with15wt% filler. The shock cushioning properties was determined via drop test where an 11.48-kg weight is dropped, from a height of 610 cm on the composites. The average Gvalue that represents product fragility was found to be 55.45.

2020 ◽  
Vol 11 (1) ◽  
pp. 72
Author(s):  
Marcio Eduardo Marquez ◽  
Fabrício Celso

ResumoA necessidade de encontrar meios para reciclar materiais que até então eram apenas descartados no meio ambiente traz também a necessidade de conhecermos a viabilidade de alguns processos em meio industrial, avaliando-os não apenas financeira, mas também tecnicamente, por meio do uso de equipamentos de fácil acesso, manuseio e manutenção. Pensando nisso, este trabalho busca aplicar o processo de trituração por moinho de facas a espumas flexíveis de poliuretano, nas quais ainda se percebe carência de estudos em se tratando de sua redução de partículas por meio de processos industriais. Com o uso de um moinho de facas, buscou-se moer aparas da fabricação de assentos sanitários, sendo que a capacidade do processo e a granulometria final do material triturado foram quantitativamente avaliados e o fluxo de material bem como a moagem em si, foram avaliados qualitativamente. Com uma capacidade aproximada de 1 kg/h, uma granulometria apresentando 46,3% das partículas com dimensões de 2,01 a 4,00mm, fluxo e moagem insatisfatórios, este processo, tal como estudado neste trabalho, foi considerado ineficiente na busca de trituração da espuma flexível de poliuretano, mantendo a necessidade de buscar ainda, em meio industrial, solucionar um problema de processo de reciclagem deste material.Palavras-chave: Espuma Flexível de Poliuretano. Moinho de facas. Capacidade. Granulometria. ABSTRACTThe need of to find ways to recycle materials those only were leave on the environment, brings the need in to know the viability of some processes in industrial scale, evaluating them not just financially form but technically to, by the use of commun, and cheaps, and easily maintenece equipements.Therefore, this paper aims to apply the grind process by knife mill to flexible polyurethane foams those don’t has a great variety of studys about their reduction particle size by processes in industrial scale. Using a knife mill, some foam burrs from the toilet seat fabrication were grinded, and the process capability, as much as the material granulometry, were quantitatively measured. The material flow into the knife mill and the grinder process were qualitatively evaluated. With a capability around 1 kg/h and a granulometry with 46,3% of the particules size around 2,01 to 4,00mm, and flow, and grind unsatisfactory, this process, in that way, was considerd inefficient in find a form of to grind flexible polyurethane foam, and it takes necessary, in industrial way, to solve a problem for reciclyng these kind of material.Keywords: Flexible polyurethane foam. Knife mill. Capability. Granulometry.


RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63853-63865 ◽  
Author(s):  
Maude Jimenez ◽  
Nicolas Lesaffre ◽  
Séverine Bellayer ◽  
Renaud Dupretz ◽  
Marianne Vandenbossche ◽  
...  

Flame retardancy of flexible polyurethane foams has become an issue due to very severe regulations.


RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21192-21201 ◽  
Author(s):  
Ting-Ting Li ◽  
Mengfan Xing ◽  
Hongyang Wang ◽  
Shih-Yu Huang ◽  
Chengeng Fu ◽  
...  

Compared with a rigid polyurethane foam, a flexible polyurethane foam (FPUF) has more diversified applications including filtration, sound absorption, vibration-proofing, decoration, packaging, and heat insulation.


RSC Advances ◽  
2014 ◽  
Vol 4 (86) ◽  
pp. 46164-46169 ◽  
Author(s):  
Xin Wang ◽  
Ye-Tang Pan ◽  
Jin-Tao Wan ◽  
De-Yi Wang

The objective of the present study is to develop fully renewable and environmentally benign techniques for improving the fire safety of flexible polyurethane foams (PUFs).


Polymer ◽  
1996 ◽  
Vol 37 (8) ◽  
pp. 1353-1361 ◽  
Author(s):  
Michael J. Elwell ◽  
Anthony J. Ryan ◽  
Henri J.M. Grünbauer ◽  
Henry C. Van Lieshout

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