Effect of different types of fillers on properties of natural rubber latex foam

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dc.contributor.authorKrunarathna, G.T.
dc.contributor.authorWithanage, N. S.
dc.contributor.authorEdirisinghe, D.G.
dc.date.accessioned2022-02-09T10:01:23Z
dc.date.available2022-02-09T10:01:23Z
dc.date.issued2015
dc.description.abstractNatural Rubber Latex Foam (NRLF) is a cellular rubber, which is made directly from centrifuged latex with 60 % dry rubber content and it gives a cushioning effect for a wide range of applications such as mattresses, pillows, cushions, upholstery, carpet backing and shoe arches. If there is a possibility of replacing a certain amount of natural rubber latex in these products, while maintaining the expected physico mechanical properties by incorporating another low cost material (filler), it would reduce the cost of production. Therefore a study was conducted to develop different natural rubber latex foam by incorporating five types of commercially available mineral fillers in five different loading levels. Fillers can stiffen the rubber phase of the foam. Therefore comparable load bearing characteristics can be obtained at higher expansion with the incorporation of filler (Blackley, 1966). There by material cost can be decrease. Methodology Samples were prepared by incorporation of talc, dolomite, calcite, 50:50 blend of dolomite and calcite and china clay as filler materials. Each of these fillers was incorporated in NR latex foam at 5 phr, 10 phr, 15 phr, 20 phr and 25 phr loading levels.Latex foam was prepared using a batch technique. The foam preparation was carried out in a Hobart type planetary mixer. To develop twenty five different foams all of these were replicated three times and they were arranged in Complete Random Design. Indentation hardness index, compression set, tensile strength and density properties of the test samples were compared against the reference sample which was prepared without incorporating fillers. Results and discussion Hardness of the compound increases with the increase of calcium carbonate filler loading up to 20 phr and it decreases beyond this filler loading. The increase in hardness may be due to fillers acting as hardening agents in rubber compounds and uniform filler distribution in the rubber phase. At higher filler loadings beyond 20 phr, the decrease in hardness is probably a result of aggregation of calcium carbonate.en_US
dc.identifier.isbn9789550481088
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/8324/10-PLT-Effect%20of%20different%20types%20of%20fillers%20on%20properties%20of%20natural%20rubber%20.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.subjectAgricultureen_US
dc.subjectExport Agricultureen_US
dc.subjectCrop Productionen_US
dc.subjectRubber Technologyen_US
dc.subjectRubber Productionen_US
dc.titleEffect of different types of fillers on properties of natural rubber latex foamen_US
dc.title.alternativeResearch Symposium 2015en_US
dc.typeOtheren_US
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