![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
The GB/T 3512-2001 standard, titled "Vulcanized Rubber or Thermoplastic Rubber – Hot Air Accelerated Aging and Heat Test," outlines the procedures for conducting hot air aging tests on rubber samples. According to this standard, the test must be carried out using a hot air aging chamber that meets specific requirements to ensure accurate and consistent results.
First, the aging chamber must be equipped with a forced air circulation system. The airflow should range between 0.5 m/s and 1.5 m/s, and the sample's largest surface area should be positioned opposite to the direction of the airflow to prevent any disturbance to the air flow rate. This ensures uniform exposure of the sample to the heated air.
Second, the dimensions of the aging chamber must be designed so that the total volume of the samples does not exceed 10% of the chamber’s effective volume. Additionally, there should be a minimum distance of 10 mm between suspended samples, and each sample should be at least 50 mm away from the chamber walls. This prevents heat concentration and ensures even temperature distribution.
Third, the chamber must have a reliable temperature control system to maintain the sample temperature within the specified tolerance range. This is essential for ensuring the accuracy of the aging process and the validity of the test results.
Fourth, a temperature measuring device should be installed inside the heating chamber to record the actual temperature during the test. This allows for real-time monitoring and verification of the test conditions.
Fifth, materials such as copper or copper alloys must not be used in the construction of the heating chamber. These materials can react with the air or affect the test results due to their thermal properties.
Sixth, the chamber must allow for an air exchange rate of three to ten times per hour. This ensures that the internal atmosphere remains stable and free from contaminants, maintaining consistent testing conditions.
Lastly, before the samples are placed into the aging chamber, the incoming air must be preheated to within the specified temperature tolerance. This helps maintain a stable environment throughout the test duration.
By following these guidelines, laboratories can conduct hot air aging tests in compliance with GB/T 3512-2001, ensuring reliable and reproducible results for rubber materials.
Compostable spoons are an alternative to traditional plastic spoons, which are made from non-renewable resources and can take hundreds of years to decompose. They are often used in settings where single-use utensils are necessary, such as take-out restaurants, food trucks, and outdoor events.
Compostable Spoon,Biodegradable Spoons,Compostable Plastic Spoons,Disposable Spoons
Anhui Jianfeng Environmental Protection Technology Co., Ltd , https://www.ahbiocutleries.com