Full Description

1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: Category 1-Centrifuged Hevea natural latex stabilized with ammonia only. Category 2-Creamed Hevea natural latex stabilized with ammonia only. Category 3-Centrifuged Hevea natural latex stabilized with low ammonia. Category 4-Centrifuged, or centrifuged and creamed, guayule latex, or other natural rubber latex, containing less than 200 µg total protein per gram dry weight of latex, with ammonia or other hydroxide. Category 5-Centrifuged Hevea natural latex treated with aluminum hydroxide or by other means, stabilized with ammonia only containing less than 0.5 % non-rubber content. 1.2 This specification is not necessarily applicable to latices prepared, stabilized, or preserved by other methods, and shall not be construed as limiting the desirability or usefulness of other categories of latices. It does apply to natural latex sources other than Hevea brasiliensis but does not apply to compounded latex concentrates. 1.3 The analytical procedures applicable to the specifications are included and appear in the following order:   Section     Sampling 6 and 7     Total Solids 8 - 17     Dry Rubber Content 18     Protein Content 19     Total Alkalinity 20     Viscosity 21     Sludge Content 22     Coagulum Content 23     KOH Number 24     pH 25     Mechanical Stability 26     Copper and Manganese 27     Density 28 - 40     Volatile Fatty Acids 41 - 45     Boric Acid 46     Dry Films 47     Precision for All Test Methods 48 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Published: 05/01/2023 Number of Pages: 14 File Size: 1 file , 410 KB Redline File Size: 2 files , 620 KB Note: This product is unavailable in Russia, Ukraine, Belarus