What is ISO 2930:2017 Rubber, raw natural — Determination of plasticity retention index (PRI)?
ISO 2930:2017 specifies a method for the determination of the plasticity retention index (PRI) of raw natural rubber. The PRI is a measure of the ability of raw natural rubber to retain its plasticity during storage and transportation, and it is an important quality parameter for rubber manufacturers and users.
The ISO 2930 standard describes a test method that involves subjecting a sample of raw natural rubber to a specific temperature and humidity condition for a specified period of time, followed by measuring the plasticity of the rubber before and after the conditioning period. The difference in plasticity before and after the conditioning period is used to calculate the PRI value.
The PRI value is expressed as a percentage, with higher values indicating better plasticity retention. The PRI value is an important indicator of the quality of raw natural rubber and can be used to predict its performance in various processing and manufacturing applications.
It is an important standard for the natural rubber industry as it provides a standardized method for measuring and comparing the plasticity retention index of raw natural rubber, which can help to ensure consistent quality and performance of rubber products.
Requirements of ISO 2930:2017
Sample preparation: The raw natural rubber sample must be representative of the lot or batch being tested and should be prepared in accordance with the sampling procedure described in the standard.
Conditioning: The rubber sample must be conditioned at a specific temperature (25 ± 1 °C) and humidity (60 ± 2%) for a minimum of 24 hours before testing.
Testing: The plasticity of the rubber sample is measured before and after conditioning using a penetrometer, and the difference in the two measurements is used to calculate the PRI value.
Calculation: The PRI value is calculated using a formula described in the standard, which takes into account the initial and final plasticity values and the conditioning time.
Reporting: The PRI value is reported as a percentage, rounded to the nearest 0.1%.
Repeatability and reproducibility: The standard specifies requirements for the repeatability and reproducibility of the PRI test method, which ensure that the results obtained from different laboratories or by different operators are comparable.
In addition, ISO 2930:2017 provides a standardized method for measuring the plasticity retention index of raw natural rubber, which is an important quality parameter for rubber manufacturers and users. By following the requirements of this standard, users can ensure that the PRI values obtained from different sources are comparable and reliable.
Benefits of ISO 2930:2017
Improved quality control: The PRI value is an important quality parameter for raw natural rubber. And ISO 2930 provides a standardized method for measuring and comparing the PRI values of different rubber samples. So, this can help to improve quality control and ensure consistent performance of rubber products.
Increased efficiency: By using a standardized test method, manufacturers and users can save time and resources in the testing and evaluation of raw natural rubber samples. The test method is simple, reliable, and can be easily carried out using common laboratory equipment.
Better communication: The PRI value is a critical piece of information for natural rubber buyers and sellers. The use of this standard ensures that PRI values are reported consistently and accurately, which can help to prevent misunderstandings or disputes between parties.
Improved product performance: The PRI value is an indicator of the ability of raw natural rubber to retain its plasticity during storage and transportation. By ensuring that PRI values are measured and reported accurately, manufacturers can select the best quality raw materials for their products, which can improve product performance and durability.
ISO 2930:2017 is an important standard for the natural rubber industry as it helps to ensure consistent quality and performance of rubber products. By providing a standardized method for measuring the plasticity retention index of raw natural rubber.
Who needs ISO 2930:2017 Rubber, raw natural — Determination of plasticity retention index (PRI)?
ISO 2930 is primarily intended for use by natural rubber producers, manufacturers, and users who need to determine the plasticity retention index (PRI) of raw natural rubber. Thus, this includes rubber processors, suppliers, and buyers who need to ensure that the raw materials they use meet the required specifications for PRI.
Therefore, The standard may also be used by testing laboratories and other organizations involved in rubber testing and quality control. In general, anyone who is involved in the production, testing, or use of natural rubber can benefit from the standard. By ensuring consistent and reliable measurements of the PRI value.
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