ASTM D3574 PDF
ASTM D B1 is a testing specification that measures the indentation force deflection of urethane foam and foam-like substances. ASTM D C specifies a method for measuring the compression force necessary to produce a 50% deflection over the entire top surface of the foam test . ASTM D Standard Test Methods for Flexible Cellular Materials-Slab, Bonded, and Molded Urethane Foams.
|Country:||Sao Tome and Principe|
|Genre:||Health and Food|
|Published (Last):||2 November 2018|
|PDF File Size:||11.42 Mb|
|ePub File Size:||20.84 Mb|
|Price:||Free* [*Free Regsitration Required]|
Lateral movement of the cell structure with corresponding shearing occurs near the side cut surface, while the pure compression deformation is predominate in the center. The and are lower force options best for foam testing, the having more test space for larger specimens.
There are several test procedures in this standard to help determine the compression, deflection, tear and tensile characteristics of flexible cellular materials urethane foams and polyurethane foams. Indentation Residual Gauge Length test for urethane foams used to determine how thick the padding is after 3d574 loaded by an average weight person. Our engineers are very familiar with foam testing to ASTM D and can help guide you through the process with the correct compression test machine.
Our test engineers would recommend the or Universal Test Machines for forces up to lbs. A 40 mm cut is placed down the middle of one end and 3 samples are required. If possible a completed manufactured product should be used as your testing specimen.
ASTM D3574 Testing Equipment for Flexible Cellular Urethane Foams
In this scenario, the deformation behavior of the specimen is relatively complex. Tear test to determine the tear propagation resistance of foam.
The specimen for Test B1 consists of the entire product or a suitable portion of it and should be no less than mm W X mm L X mm thick. Have a question about conducting the test for this standard? GK mechanical vice grips can also be used. For Test M recovery time is measured in seconds. The standard specimen for this test is 50mm X 50mm X 25 mm thick or larger.
GKP pneumatic vice grips can be used for high volume testing or for very accurate and consistent clamping force. These correction options are available with all ZwickRoell testing machines as a standard function. These versatile test machines can be configured to test in both tensile and compression.
According to ASTM Dthe height and travel-zero point is redetermined before the measuring cycle. IFD Indentation force deflection and ILD indentation load deflection are two of the more common compression tests in this standard.
For Test F, specimens are generally about mm long blocks with the width and depth the same as the material pad thickness.
ASTM D Testing Equipment for Flexible Cellular Urethane Foams
All of our test machines configured for ASTM D are supplied with perforated base plates for supporting the ast samples. Dog bone specimens are cut from a We are confident that we have what you are looking for.
This test is similar to ISO The test consists of a total of five test cycles, of which the first and the last are evaluated. Measurements are made for tensile stress, tensile strength, and ultimate elongation. Call one of our engineers to learn more about which package is best for you. GKP Pneumatic Vice Grips can be used for high volume testing or for very accurate and consistent clamping force.
The specimen should be mm X mm X 50mm. ASTM D is a widely accepted test standard for testing soft polyurethane foam. Generally the test consists of three preload cycles, followed by a measuring cycle in which the characteristic values are determined. adtm
Cuts test specimens from stock material Available for a wide variety of ISO and ASTM standards Consistent specimens for consistent results Manufactured with tool steel to resist damage and wear over time. Density is measured using a scale that is connected to the PC. Hysteresis tests measure the difference e3574 area under the curves during loading and unloading, representing energy loss.
For this reason it is not possible to effectively compare measured values that are determined from specimens of various dimensions using this test method.
Compression hardness ISO , ASTM D
You are seeking to quantify the firmness of your foam. The density measurement process can be integrated in the test sequence.
The compression stress value is the pressure resistance that a defined specimen under specified environmental conditions applies to a defined whole-surface compression. Our test machines do that for you.
The qstm used by Renault and PSA are exceptions. Forces up to 10 kN 2, lbf Low force tabletop systems Modular series of five frame options with adjustable test space Affordable testing option for tension, compression, bend, peel and much more.