The current practice of concentrated natural rubber latex production includes the reduction of magnesium ion (Mg²⁺) with the addition of diammonium phosphate (DAP) before being transferred to undergo concentration by a centrifugation process. But in this process, the chemical reaction between Mg²⁺ and DAP produces a sludge waste. In this research, cationic exchange resins are used to prevent the formation of sludge waste in the concentrated latex by prior removal of the Mg²⁺ ions from the field natural rubber latex instead of using chemical precipitation with DAP. Moreover, the extractable protein in the natural latex is absorbed by the cationic exchange resins, which results in low protein levels in the concentrated latex. This method, therefore, allows the manufacture of latex-based articles possessing reduced skin irritability specifically for those who are allergic to latex proteins. Thin films of the resulting latex concentrate on the former were characterised by a film property analysis. The physical properties of latex thin films are found to meet the requirements of ASTM D-3578-01a for natural rubber examination gloves.

中文翻译：

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阳离子交换树脂预处理天然橡胶胶乳对胶乳浸渍膜性能的影响

浓缩天然橡胶胶乳的当前生产实践包括在通过离心法转移浓缩之前，通过添加磷酸二铵（DAP）还原镁离子（Mg ²⁺）。但是在此过程中，Mg ²⁺与DAP之间的化学反应产生了污泥废物。在这项研究中，阳离子交换树脂用于通过事先去除Mg ²⁺来防止浓缩胶乳中淤渣废物的形成。离子来自天然橡胶胶乳，而不是通过DAP进行化学沉淀。而且，天然乳胶中的可提取蛋白质被阳离子交换树脂吸收，这导致浓缩乳胶中的蛋白质水平低。因此，该方法允许制造具有降低的皮肤刺激性的乳胶基制品，特别是对于那些对乳胶蛋白过敏的人。通过膜性质分析表征所得乳胶浓缩物在前者上的薄膜。发现乳胶薄膜的物理性能符合ASTM D-3578-01a对天然橡胶检查手套的要求。