China Drying Network News Shandong Provincial Bureau of Quality and Technical Supervision recently reported the results of the second quarter of rubber seal product quality checks, there are five companies of five batches of products do not meet the requirements of the relevant standards. According to reports, 29 batches of rubber seal products produced by 29 companies in Shandong Province were spot-checked. The rubber seals were tested for their hardness, tensile strength, tensile elongation, compression set, liquid resistance, hot air aging, brittle temperature, dimensional measurement, and appearance. Spot checks found that the main unqualified items for the five batches of products were hot air aging and liquid resistance tests.
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