Total Solid Content and Compound Properties from Different Collection Time of Hevea brasiliensis Latex

Abstract

This study compared the total solid content and compound properties of Hevea rubber latex produced from material collected during different periods. Samples were collected from five trees, with the collection replicated three times with tapping task as replication. Observed parameters included total solid content, vulcanization characteristics, technical and physical properties. The results exhibited that the longer latex flowed, the more total solid content tended to decrease. Results indicate that compound of latex collected 20 minutes (C20), 60 minutes (C60), and 300 minutes (C300) after tapping qualified for SIR 20. Other parameters did not show a significant difference among the three tested compounds. Considering the products requiring high dry rubber content, it is suggested not to blend the late collection with main collected latex.

The Effect of Type of Vibration to the Quality of Concentrate Latex on the Creaming Process

“…The increasing size of the rubber particles causes the process of making of concentrated latex to be faster [6]. For products requiring high DRC, it is recommended not to blend late latex collection with main latex collection [10]. The dry rubber content in the horizontal vibration treatment has met the ISO 2004 standard, which is 66,67%, while the DRC in the orbital vibration treatment is still below the ISO 2004 standard.…”