GB/T 8289-2001 in English

本标准规定了全部或部分用氨保存的离心法和膏化法生产的浓缩天然胶乳的规格。本标准包括下列各类离心和膏化浓缩天然胶乳的技术要求:高氨浓缩天然胶乳，浓缩后只用氨保存的离心浓缩胶乳，碱度(按胶乳计)至少为0.6%(m/m)；低氨浓缩天然胶乳，浓缩后用氨和其他保存剂保存的离心浓缩胶乳，碱度(按胶乳计)不超过0.29%(m/m)；中氨浓缩天然胶乳，浓缩后用氨和其他保存剂保存的离心浓缩胶乳，碱度(按胶乳计)至少为0.3%(m/m)。高氨膏化脓缩天然胶乳，浓缩后只用氨保存的膏化浓缩胶乳，碱度(按胶乳计)至少为0.55%(m/m)。低氨膏化浓缩天然胶乳，浓缩后用氨和其他保存剂保存的膏化浓缩胶乳，碱度(按胶乳)，不超过0.35%(m/m)。本标准适用于巴西橡胶树胶乳生产的浓缩天然胶乳。

Scope

This standard specifies the specifications of concentrated natural rubber latex produced by centrifugation and creaming methods preserved in whole or in part by ammonia. This standard includes the technical requirements for the following types of centrifugation and creaming concentrated natural rubber latex: High ammonia concentrated natural latex, centrifuged concentrated latex preserved only with ammonia after concentration, the alkalinity (based on latex juice) is at least 0.6% (m/m ); low-ammonia concentrated natural rubber latex, centrifuged concentrated latex preserved with ammonia and other preservatives after concentration, the alkalinity (according to latex juice) shall not exceed 0.29% (m/m); medium ammonia concentrated natural latex, concentrated with ammonia and other preservatives Centrifugal concentrated latex preserved by other preservatives, with an alkalinity (by latex juice) of at least 0.3% (m/m); Latex juice) is at least 0.55% (m/m); low-ammonia creamed concentrated natural latex, the creamed concentrated latex preserved with ammonia and other preservatives after concentration, the alkalinity (by latex juice) is at least 0.35% (m/m m); This standard applies to concentrated natural rubber latex produced from Hevea brasiliensis latex.