Study of factors effecting indentation hardness index of natural latex foam การศึกษาปัจจัยที่มีผลกระทบต่อค่าดัชนีความแข็งเชิงกด ของฟองน้ำลาเท็กซ์
Abstract
Study of factors effecting indentation hardness index of natural latex foam
Latex foam made from natural rubber latex has porous texture, good ventilation, and excellent load carrying capacity; therefore, it is widely used to make products such as pillows and mattresses. Indentation hardness index is one of the major properties that reflect the quality of latex foam products. This research aims to investigate the factors, affecting the indentation hardness index determined in accordance with ISO 2439-2008, for example, density, thickness, location where the test pieces were obtained. This study has shown that these factors play a significant role in determining the indentation hardness index of the latex foam.
References
MALAYSIAN STANDARD. MS 679:2011, Latex foam rubber mattresses for domestic and general use – Specification (Second revision).
SOPPI, E., et al. “ An overview of polyurethane foams in higher specification foam mattresses,” Ostomy. Wound Manag., Feb. 2015, pp. 38-41.
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. ISO 2439:2008, Flexible cellular polymeric materials-Determination of harness (indentation technique).
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