ISO 24376:2022 PDF

Scope: This document provides guidelines and gives requirements on the specification of low protein natural rubber (LPNR). A grading system is proposed, based on the origin of the natural rubber content and differentiated by the two processes, enzymatic and non-enzymatic, applied for removal of the proteins.

ISO 24376:2022 Referenced Document

ISO 1656 Rubber, raw natural, and rubber latex, natural — Determination of nitrogen content
ISO 1795 Rubber, raw natural and raw synthetic - Sampling and further preparative procedures
ISO 2007 Rubber, unvulcanized - Determination of plasticity - Rapid-plastimeter method
ISO 247-1 Rubber - Determination of ash - Part 1: Combustion method
ISO 248-1 Rubber, raw - Determination of volatile-matter content - Part 1: Hot-mill method and oven method
ISO 249 Rubber, raw natural — Determination of dirt content — Amendment 1*， 2022-06-27 Update
ISO 289-1 Rubber, unvulcanized - Determinations using a shearing-disc viscometer - Part 1: Determination of Mooney viscosity
ISO 2930 Rubber, raw natural - Determination of plasticity retention index (PRI)

2022 ISO 24376:2022 Rubber, raw natural — Guidelines and requirements for technically specified low-protein natural rubber