ASTM D570 Water Absorption of Plastics

ASTM D570 is a test method that determines the relative water absorption properties of unreinforced and reinforced plastics, including cast, hot-molded, and cold-molded resinous products. ASTM D570 evaluates the rate of absorption of water by immersing the specimen in water for a specific period of time. The time of immersion, the temperature of the water, the thickness of the sample and the type of material are the main factors to be considered while carrying out ASTM D570 test. Read more about ASTM D570 Water Absorption of Plastics below.


Introduction to ASTM D570

ASTM D570 is a test method designed to measure the water absorption properties of plastics when immersed. All types of plastics, including cast, hot-molded, and cold-molded resinous products, and both homogeneous and laminated plastics in rod and tube form are worked upon by this test method. The results obtained are specially used for quality control and specification purposes. ASTM D570 evaluates the amount of water that is absorbed by the sample by calculating the percentage increase in weight of the sample following the experiment, and it also permits to assess the uniformity of the imbibed specimen. MaTestLab has the best network of testing labs in the USA to carry out ASTM D570 test for our clients.

ASTM D570 test method is generally applicable to determine the proportion of water absorbed by plastics and the relationship between moisture and electrical or mechanical properties of the materials under test. 

ASTM D570 Test Method

This test method utilizes a Mettler balance to calculate the water absorption values for different durations of immersion. Proportions of water absorption are determined respectively for twenty-four-hour immersion, two-hour immersion, repeated immersion, long-term immersion, two-hour boiling water immersion, one half-hour boiling water immersion, and immersion at 50 degree Celsius. 

Test procedure at ambient temperatureThe conditioned specimens are completely immersed in the container of distilled water maintained at a temperature of 23 degrees Celsius. Towards the end of the decided duration of immersion, the specimens are removed, wiped off with a dry cloth and weighed. 
Test procedure at elevated temperatureThe conditioned specimens are placed in a container of boiling distilled water and are supported on edge. The specimens are immersed for the desired time and then removed. They are then cooled in distilled water maintained at room temperature and weighed separately.

ASTM D570 Specimens

Specimen detailsASTM D570 Specimens must be plastics molded in a disk shape, rod, or tube form.
Specimen dimensionsPlastic sheets used in this test method are 0.13 mm (0.005 in.) or greater in thickness. Molded plastics in the form of disks 50.8 mm in diameter and 3.2 mm in thickness are preferred. 
Specimen preparationSpecimens are injection molded or cut from molded or extruded sheets or plates.

ASTM D570 Results

This test method evaluates the relative water absorption of plastics when immersed. Factors like the type of plastic, additives used, temperature, and length of exposure affect water absorption. The moisture content of plastic is related to properties such as electrical insulation resistance, dielectric losses, mechanical strength, appearance, and dimensions. Water absorption is expressed as an increase in weight percent. 

Percent Water Absorption = [(Wet weight – Dry weight)/ Dry weight] x 100

Tests related to ASTM D570
ISO 2896 is similar to ASTM D570. ISO 2896 covers the water absorption properties of plastics like the ASTM D570 and measures the rate of water absorption of rigid cellular plastics by immersing them in a 50 mm head of water. The changes in the volume of the specimens are corrected and the buoyant force on the specimens is determined. The test is specifically important for quality control and for product specification.

Direct Link for Download ASTM D570 Standard Test Method PDF


Where can I get the astm d570 tested?

You can share your astm d570 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 d570 test to various testing techniques.

How much do I need to pay for the astm d570 test?

Please contact us for a detailed quote for your astm d570 testing needs. Cost incurred to carry out different astm d570 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 d570?

The required number of samples or specimens should comply with the procedure given in the astm d570 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 d570 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 d570 test?

The turnaround time for astm d570 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 d570 tested?

You can share your astm d570 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 d570 test to various testing techniques.

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