ASTM D6980 Determination of Moisture in Plastics by Loss in Weight
ASTM D6980 provides a methodology for the quantitative determination of moisture content by the loss-in-weight method, up to 50 ppm, applicable to most polymers. Operators may expose samples to temperatures up to and even above 250°C during this procedure; therefore, consider the high heat when handling test samples after testing is complete. The presence of moisture affects the physical properties and processing characteristics of plastics. Low moisture (high temperature) causes solid-phase polymerization.
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ASTM D6980 Introduction
ASTM D6980 (Standard Test Method for Determination of Moisture in Plastics by Loss in Weight) provides a systematic procedure for identifying the moisture content in plastics by measuring weight loss through heating. Moisture content is essential because even low levels can cause defects such as voids, surface defects, hydrolytic degradation, and loss of mechanical properties during molding and extrusion. Laboratories commonly use this process for quality control, material qualification, and the optimization of plastics manufacturing to meet performance and processing requirements.
Get Certified ASTM D6980 Testing for Accurate Moisture Analysis
ASTM D6980 certification ensures that labs use internationally accepted methods to state the moisture content in plastics. This certification guarantees consistent outcomes, repeatability, and industry standards, assisting manufacturers as they make process decisions, select materials, and submit regulated applications.
Service Name
Remarks
ASTM D6980 Testing
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A Thermogravimetric Analyzer
What are the testing procedures and requirements?
In the ASTM D6980 test, the analyst weighs the plastic sample (in grams, g), then heats it to remove moisture, and reweighs to determine mass loss. The analyst places the specimen in a preheated, calibrated oven-analyzer and sometimes grinds it to ensure uniform drying. The oven vaporizes moisture from the sample, and the analysis finishes when the rate of weight loss becomes negligible. For accuracy, technicians use a 0.1 mg analytical balance and frequently validate results using sodium tartrate dihydrate.
Test Principle
Loss in weight due to moisture removal
Heating Method
Oven or moisture analyzer
Test Temperature
Material-specific, controlled
Sample Mass
As specified by the method
Heating Duration
Until a constant weight is achieved
Measurement
Initial and final mass
Result Expression
Percentage moisture content
ASTM D6980 Scope
Relevant to most plastics.
Loss in weight determines moisture.
Applicable to pellets, powders, and molded plastics. Applied in process control and material qualification.
Facilitates comparative and regular testing.
Equipment and Sample Preparation
Specimen Details
Plastic pellets, powder, or molded parts
Specimen Preparation
Clean, representative samples free from contamination
Specimen Dimensions
Not critical; mass-based measurement
Technique, Process and Data Collection for Determination of Moisture in Plastics by Loss in Weight
When performing ASTM D6980 testing, technicians weigh all samples and then heat them to a specified temperature to dry them. Following heating, they cool the sample under controlled conditions and reweigh it. They calculate the moisture content by measuring the difference between the initial and final weights. The gathered indirect data provides firsthand information on the materials’ suitability for processing and storage.
Analysis Results and Interpretation for Determination of Moisture in Plastics by Loss in Weight
The ASTM D6980 results express moisture content as a percentage by weight. A higher moisture content indicates the need for further drying before processing, while a lower moisture content indicates that the material is ready for molding or extrusion. Consistent performance across batches contributes to constant manufacturing performance and low defect rates.
ASTM D6980 Use/Applications
Plastic raw material quality control.
Checking of drying efficiency.
Optimization in molding and extrusion.
Checking of incoming materials.
Material and research development.
Common Challenges and Troubleshooting
Factors such as incorrect temperature selection, sample contamination, or ambient humidity before testing can cause errors in testing. Technicians enhance accuracy and repeatability by using quick sample processing, sealed containers, fast handling, and proven heating conditions. To resolve discrepancies in moisture readings between tests, they must ensure uniform sample handling, avoid environmental exposure, and strictly control heating temperature and time in accordance with ASTM D6980.
Factors to Consider for ASTM D6980
Speed Automated moisture analyzers enable very quick moisture determination, reducing testing time without compromising accuracy.
Expertise Laboratory experts will confirm the appropriate temperature and ensure compliance with ASTM D6980, providing reliable, repeatable results.
Cost ASTM D6980 testing services are cost-effective, enabling greater optimization of laboratory resources without compromising the quality of moisture analysis or standard compliance.
Suyog Kamble is an Operations Associate at MaTestLab Inc. and holds a postgraduate degree in Organic Chemistry.
FAQ's
Where can I get the astm d6980 tested?
You can share your astm d6980 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d6980 test to various testing techniques.
How much do I need to pay for the astm d6980 test?
Please contact us for a detailed quote for your astm d6980 testing needs. Cost incurred to carry out different astm d6980 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm d6980?
The required number of samples or specimens should comply with the procedure given in the astm d6980 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm d6980 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm d6980 test?
The turnaround time for astm d6980 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm d6980 tested?
You can share your astm d6980 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d6980 test to various testing techniques.
MaTestLab Inc. offers accessible, quick, and affordable material testing, product testing, and failure analysis services. We support your on-demand testing and expert consultation needs with the help of our extensive network of material testing laboratories situated in the US and other parts of the world.
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