Natural rubber latex from the Brazilian rubber tree, Hevea brasiliensis, is commonly used for thin film barrier applications in products such as condoms, medical gloves and dental dams. Type I and Type IV latex allergy sensitization and subsequent allergic reactions from Hevea natural rubber latex products have created an industry demand for thin film barriers that are circumallergenic (circumvent the allergic response). Also, both Hevea and synthetic thin film products are prone to causing Type IV contact dermatitis allergies, attributed to residual thiazoles, thiurams and carbamates accelerators.
Analysis of natural rubber latex films
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