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NatureDent brush: Ett examensarbete inom produktutveckling med förnybara material
Halmstad University, School of Business, Engineering and Science.
Halmstad University, School of Business, Engineering and Science.
2017 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Detta examensarbete har utförts på Högskolan i Halmstad. Tillsammans med Swt Development har uppgiften varit att utveckla en prototyp av en tandborste tillverkad i en förnybar biokomposit bestående av polylaktid (PLA) och cellulosafiber. Utgångspunkten var att utveckla en plastprodukt som används inom bland annat vården. Prototypen av tandborsten avgränsades till handtag, hals och huvud.

Examensarbetet omfattar hela produktutvecklingsprocessen med dess metoder och verktyg som använts för att ta fram och utveckla koncept till en prototyp. För att generera koncept användes nyhetsundersökning med research och patentdatabassökning samt en negativ idégenerering. Som konceptutvärderingsmetoder användes SWOT-analys, Pugh’s matris samt FMEA-analys. För att dimensionera och analysera koncept användes antropometriska data, hållfasthetsberäkningar, Catia V5, Solidworks samt vatten-och dragprovstester.

Det vinnande konceptet var en tandborste tillverkad i 40vikt% fiber med en räfflad del på handtaget för ett bättre grepp. Tandborstens dimensioner utformades i Catia V5 utifrån materialets sträckgräns genom approximativa hållfasthetsberäkningar samt hållfasthetsanalyser i Solidworks. CAD-skissen utvecklades vidare till en färdig prototyp som sedan skrevs ut i 3D-skrivare.

Resultatet visar att det är möjligt att tillämpa biokompositmaterial i en produkt som kan ersätta en produkt i konventionell plast. Examensarbetet belyser på så vis möjligheterna hos produkter baserade på förnybara material. Utvecklingen av produkter bestående av förnybara material kan därför bidra till att minska användandet av plastprodukter inom bland annat vården för att på så sätt minska dess negativa inverkan på miljön. 

Abstract [en]

This degree thesis has been carried out at the University of Halmstad. In collaboration with Swt Development, the task has been to develop a prototype of a toothbrush made in a renewable biocomposite consisting of polylactic acid (PLA) and cellulose fibers. The outset was to develop a plastic product used in, among other areas, medical industry and healthcare. The prototype was demarcated to the handle, neck and head of the toothbrush.

The degree thesis covers the entire product development process with its methods and tools used to develop and evaluate concepts for a prototype. In order to generate concepts, novelty research was used with literature research, patent database search and a method called negative idea generation. As concept evaluation methods, SWOT-analysis, Pugh's matrix and FMEA-analysis were used. To dimension and analyze concepts the methods used were anthropometric data, calculations, Catia V5, Solidworks, and water resistance test in addition to a tensile test.

The winning concept was a toothbrush made in 40wt% fiber with grooves on the handle for a better grip. The toothbrush dimensions were designed in Catia V5 based on the material's tensile strength, through approximate strength calculations and SolidWorks strength analyzes. The CAD model was further developed into a finished prototype, which was then printed in a 3D printer.

The result shows that it is possible to apply biocomposites to a product that can replace a product made with conventional plastic. This degree thesis thus illuminates the possibilities of products based on renewable materials. The development of products consisting of renewable materials can therefore contribute to reducing the use of plastic products in, inter alia, healthcare, thereby reducing its negative impact on the environment.

Place, publisher, year, edition, pages
2017. , 57 p.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:hh:diva-34013OAI: oai:DiVA.org:hh-34013DiVA: diva2:1106788
External cooperation
Swt Development; Arena Grön Tillväxt
Subject / course
Mechanical Engineering
Available from: 2017-06-27 Created: 2017-06-08 Last updated: 2017-06-27Bibliographically approved

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