Idag kastas eller bränns majoriteten av den svenska ullen upp, på grund av att det inte finns någon efterfrågan eller logistik för att ta tillvara på den. Samtidigt utgörs majoriteten av allstoppningsmaterial syntet, som utvinns från fossila bränslen vilket är ett stort miljöhot på jorden. Syftet med den här undersökningen var att ta reda på om det gick att tillämpa svensk ull som stoppning i en barnvagn, där det nuvarande materialet är av syntet, för att förädla den redan existerande ullen. För att utvärdera vilken typ av ull som skulle lämpa sig bäst för detta ändamål samt hur en produktionsprocess skulle kunna se ut, så har en omfattande litteraturstudie samt intervjuer genomförts. Resultatet har framställts genom den kunskap som den empiriska studien har gett om ullensfiberuppbyggnad och beredningsprocess samt om olika ullsorter och dess unika egenskaper, för att stärka resultatet av vilken ulltyp som lämpar sig till stoppning. Intervjuerna med kunniga personer har dessutom gett nya upptäckter om ullens status i Sverige idag. Efter att ha fastställt resultatet kunde slutsatserna dras att ull lämpar sig mycket bra som ett ersättande material för syntet i stoppning i en barnvagn. Texel, Suffolk och Gotlandsfår är treullsorter som lämpar sig bra för detta ändamål. Genom Ullkontoret och andra verksamheter inom ullindustrin kan en produktionsprocess för denna produkt utforskas. / Today, the majority of the Swedish wool is being thrown away or burned up, due to the fact that there is no demand or logistics to utilize it. At the same time, the majority of all padding material is made of synthetics, which is extracted from fossil fuels and represents a major environmental threat to the earth. The purpose of this study was to find out if it was possible to apply Swedish wool as padding inside a stroller, where the current material is made of synthetic, in order to refine the Swedish wool. To evaluate the type of sheep that would be best suitable for this purpose and how a production process for this aim might look like, there has been a thoroughgoing literature study and interviews conducted. The result has been produced by the knowledge that the empirical study has provided regarding the wool's fiber structure and preparation process as well as different types of wool with its unique properties, to strengthen the result of which wool type is best suitable as padding. In addition, the interviews with knowledgeable people have enlightened new discoveries regarding the status of wool in Sweden today. After re-establishing the result, it was concluded that wool is very much suitable as a substitute for synthetic padding in a stroller. Texel, Suffolk and Gotland Sheep are three different kinds of wool, suitable for this purpose. Through Ullkontoret and other operations in the wool industry, a production process for this product can be explored.

Abstract Visibility is crucial to ensure safety and security for both drivers and pedestrians in everytraffic situation, especially during low-light conditions. While Swedish legislationregulates visibility-enhancing equipment for vehicles, trailers, and wheelchairs, there is anotable absence of similar legislation for strollers. This leads to a variation inimplemented visibility measures by manufacturers, sometimes resulting in the exclusionof reflective components. This lack of standardization leaves the responsibility on usersto improve stroller visibility. Thule, a Swedish company specializing in products for active outdoor lifestyles, offers awide range of products, including roof boxes, roof tents, and strollers. Thule's strollerscome with integrated reflectors and are relatively well-equipped compared tocompetitors. However, there is a general perception among users of the need foradditional visibility measures. To address this need, the Thule Group initiated a project led by two engineering studentsspecializing in product development and design at Jönköping University. The studentsconducted the project during the spring semester of 2024 as part of their mechanicalengineering thesis. The company's project goal was: “To develop a generic accessory that can increase the visibility of all Thule strollers indarkness.” The objective was also to develop a visibility-promoting product that seamlesslyintegrates with Thule's design, serving as a complement to their product range. This report presents the entire process of the project, which is based on the DoubleDiamond method. During the project, field observations were conducted with the ThuleUrban Glide 4-wheel, along with a user survey confirming the need for increasedvisibility in darkness. Several concepts and prototypes were developed, resulting in a finalprototype tailored for most of Thule's stroller models. The final prototype is designed as a two-part accessory intended to be mounted on theupper part of the stroller's frame. It includes two optical fiber cables with whiteillumination on the side of the stroller, as well as two red LED lights that illuminate thepath behind the stroller. The prototype demonstrates improved stroller visibility, therebyenhancing safety in traffic areas.