Cup Lump Rubber

The primary form of natural rubber, collected from rubber trees and processed through simple coagulation

Cup Lump Rubber

What is Cup Lump

Cup Lump is the most basic form of natural rubber collected during the tapping process. After tapping the rubber tree, the latex naturally flows into a cup where it coagulates into a cup-shaped block, hence the name "cup lump."

Cup lump is an important raw material for rubber processing. Our cup lump comes from quality rubber plantations in Liberia and Côte d'Ivoire, where farmers use traditional tapping techniques to ensure latex quality. After collection, the cup lump is initially cleaned and sorted before being transported to processing facilities.

Product Features

  • Naturally coagulated, preserving the original rubber characteristics
  • Traceable source from contracted quality plantations
  • Initially sorted with low impurity content
  • Can be used as raw material for crumb rubber and smoked sheets
Processing

Processing Flow

After collection, cup lump undergoes quality inspection including impurity content and dry rubber content testing. Qualified cup lump enters the processing stage:

  1. Washing & Sorting — Remove dirt, bark, and other impurities
  2. Crushing & Sheeting — Break into uniform small pieces
  3. Drying — Control moisture content to standard levels
  4. Quality Testing — Physical and chemical testing per ASTM standards
  5. Packaging & Storage — Sorted by specification, ready for shipment