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Advanced Melt Flow System. The 6MPCA is the most advanced digital model offered within the Ray-Ran range of melt flow index testers. The operating. Find the most up-to-date version of ASTM D at Engineering ASTM D(). Standard Test Method for Flow Rates for Poly(Vinyl Chloride) with Molecular Structural Implications. standard by ASTM.

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Each test result was the average of? Due to the corrosive properties of PVC materials, the instrument was equipped with a special corrosion resistant kit to prevent any interaction between the material and the metal during testing.

Check this box to receive pertinent commercial email from Instron focusing on products, upcoming events, and more! Be careful not to squeeze the specimen; the specimen should? The sensitivity of the material to temperature necessitates slightly tighter controls than those stated in Test Method D Current research for multiweight testing has reached levels of 50 kg and these are particularly good for rigid PVC.

This statement further de? Many PVC compounds are elastic in nature, causing a severe loss in pressure from the bottom of the piston through the material to the ori? These changes are due to three types of measured instability in polymers:.

At least twice a day check the ori? Dry off the cooled die with a cloth and inspect to see that the ori?

Current edition approved March 10, Correlations with a wide range of processing conditions have supported the conclusions that little or no change in composition occurs during the test. A number in parentheses indicates the year of last reapproval.

When charging is complete, pack down the PVC with the phenolic-coated charging tool by repeated thrusts. Subscribe to Our Newsletters. Viscosity Adtm Rate 1? The sensitivity of this test method makes it useful for correlating with processing conditions and as an aid in predicting changes in processing.

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It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to d334. Put the die hot into methyl ethyl ketone in order to break the PVC skin away from the ori?

This test method is used for quality-control tests on PVC compounds that have a wide range of melt viscosities. Thus, implications with respect to PVC molecular structural changes can asgm detected and predicted. This average value is the PVC?

ASTMD Standard Test Method for Poly(Vinyl ride) with Molecular Structural Implications_百度文库

Users of this test method should apply the principles outlined in Practice E to generate data speci? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

This may be due to variable lubricant conditions at the metal surfaces or chemical changes in the PVC compound. We use cookies to improve your browsing experience. The sensitivity of this test method makes it useful for correlating with processing conditions and as an aid in predicting changes in processing.

ASTM D3364 – 99(2011)

The sensitivity of the material to temperature necessitates slightly tighter controls than those stated in Test Method D This test is specific to the measurement of Melt Flow Rates MFR or MFI of poly vinyl chloride compounds while detecting and controlling various polymer instabilities associated with the flow rate.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The value for the instability will then be positive or negative. This weight is effective for all semirigid PVC and even some nonrigid compounds. Glossary of Materials Testing Terms. The quantity of material introduced into the barrel is 2.

A clean sharp cut is desirable so that succeeding portions will extrude straight, not curled. A negative instability indicates either a degradation of the polymer or a change in the lubricant function at the metal surface of the die. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Precision and Bias Most regulators designed for Test Method D cannot control better than The values given in parentheses are mathematical conversions to inch-pound units that are provided for v3364 only and are not considered standard.

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If instability still occurs, particularly at high? Contact Us View Accessories Catalog. The cause of this unstable asgm should be studied and understood. Description Contact Us This test method is used for quality-control tests on PVC compounds that x3364 a wide range of melt viscosities. As a guide, each specimen should be about 20 to 30 mm long. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

Rheological instability due to nonuniform distributions of widely sstm viscosity or molecular weight elements. Summary of Test Method 4. Thus, this test is able to detect and follow profound changes which occur during extrusion, injection molding, milling, or mixing. Temperature Total load on piston Approximate pressure Charge Plugged ori?

ASTM D3364 Flow Rates for Poly Vinyl Chloride

It is the responsibility of the user of this standard to establish appropriate safety and health practices and astn the applicability of regulatory limitations prior to use. However, as a one-point measure of flow relative to shear rate, its one drawback is that the same PVC melt flow values can be obtained for materials having different processibility; the chance of this happening is minimized, however, if the compounds are asrm in composition.

NOTE 3—Occasionally, the values change throughout the run.