ASTM D5630 Standard Test Method for Ash Content in Plastics
ASTM D5630 test method measures inorganic content in plastics using destructive ashing procedures, covering ash levels of 0.01 % or higher, but cannot qualitatively identify individual chemical components.
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Introduction to ASTM D5630
ASTM D5630 test method involves burning a sample of the plastic material at a high temperature and measuring the residue left behind, which consists of inorganic materials. This method provides a quantitative measure of the ash content, which can be useful for quality control and material characterization in various industries, including plastics manufacturing and recycling.
ASTM D5630 plastics ashes can leave behind inorganic residues such as colorants, fillers, reinforcements, and antiblock, which in turn are used for other important manufacturing processes.
Test Procedure of ASTM D5630
Specimen Selection
ASTM D5630 involves selecting a representative sample, finely ground, sieved, weighed, heated in a muffle furnace, and calculating ash content. This ensures accurate assessment of plastic ash content..
Test Setup and Execution
During the test setup for ASTM D5630, a sample is prepared by cutting it into smaller pieces and grinding it to ensure uniformity. It is weighed and then it is ashed in a muffle furnace at 550°C for 2 to 4 hours. The ash content is calculated by using the following formula: ash Content (%) = [(Weight of Ashed Residue / Weight of Sample)] x 100.
ASTM D5630 Test Specimens
Specimen Details
Before testing, sample specimens comprising of hygroscopic materials, such as nylons and other materials are dried to a constant weight. However, the sample must be homogeneous and adequately mixed.
Specimen dimensions
The size and shape of the specimens can be chosen based on the specific requirements of the material and testing equipment; however, factors such as specimen size, shape, and preparation methods should be consistent and representative of the sealant being tested.
Results of ASTM D5630
ASTM D5630 results provide insights on plastic material’s ash content, indicating filler presence, impurities, contaminants, and aiding in quality control. It helps assess purity, composition, and suitability for intended applications.
Tests Relevant to ASTM D5630
The tests relevant to ASTM D5630 ASTM D3174 (ash in rubber), ASTM D482 (ash in petroleum products), and ASTM E1755 (ash in biomass). These test methods provide details about the ash content.
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