ASTM D Standard Test Methods for Pressure-Sensitive Adhesive- Coated Tapes Used for_化学_自然科学_专业资料。ASTM D ASTM D – Standard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications. ASTM D – Standard Test Methods for Pressure-Sensitive Adhesive- Coated Tapes Used for Electrical and Electronic Applications. This standard is a part.
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Check the zero reading on the scale. These test methods are similar to IEC —3, but may differ sometimes in some details. Run off approximately 10 m 10 yd for each test. The curing reaction involved is not reversible, and tapes once heat-cured remain cured. Permission rights to photocopy the standard may also be secured from the ASTM website www.
This test is a measure of the stability of the tape upon exposure to one type of severe environmental condition. Atsm necessary, adjust the angle of the rod by successive trials until the proper angle for the particular tape is obtained.
It is desirable, but not essential, that this instrument automatically record this distance as a function of the load on the test specimen, or of the elapsed time for the start of the test, or both. The change d0100 dielectric breakdown voltage is used as a measure of this resistance. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Polyethylene terephthalate polyester films. The extension indicator will usually have a separation of 25 mm 1 in.
B Minimum and maximum values are also occasionally required when average values are reported. For tapes of 0. Apply the specimen so that a mm 5-in. Apparatus and Materials When making high voltage tests, particularly in compressed gas or in oil, it is possible that the energy released at breakdown will be suff?
Polish the electrodes of brass or copper with No.
Adhesion to Steel Panel There shall be no obstructions in the path between the platform and the spindle. Immerse the panel completely in the test? Apply four 6 mm 1? Firmly clamp the tape between the electrodes taking great care to avoid contact between the hands and any tape surfaces between electrodes.
In general, the smooth-ground surface offers high gripping efficiency with most? If a value for measurement is followed by a value in inch-pound or English units in parentheses, the second value may only be approximate and is for information only. Pass the adhesion roller prescribed in By measuring the insulation resistance of tape samples in contact with speci?
Thoroughly instruct all operators in the proper way to conduct tests safely. Thread the ashm over the pull roll and attach it to a core on the wind-up mandrel. Bond Strength Astk Solvent Immersion. Clamp this portion of the exposed panel in the lower jaw d1000 the testing machine and place the free end of x1000 tape in the upper jaw. If it is necessary to prepare narrower specimens as prescribed in the test method, use extreme care since hand trimming has the potential to materially affect the test results.
Make a minimum of three acceptable determinations.
Calculate the average bond strength in newtons per 10 mm of width, or pounds-force per inch of width. Test Specimen Preparation 5. Provide means for use, at the completion of any test, to ground any parts which: Continue the test asmt a prescribed time, or until failure occurs by bond separation. Puncture resistance is important because of the possibility that objects with irregular surfaces or relatively sharp contours such as wire or laminate will be present in the application and have the potential to cause d000 rupture in the tape.
It is advisable to cover the test chamber with thermal insulation in order to minimize internal temperature?
ASTM D – Testing equipment according to ASTM D | Rycobel
See also Table 1. The electrodes which are a part of the test?
Use a guard so that only the current? It is essential that the test apparatus, and all associated equipment electrically connected to it, be properly designed and installed for safe operation. If it is necessary to trim the specimens due to the machine or jaw width limitations, take extreme care since hand trimming has the potential to materially affect the test results.
Calculate and record all values, and the median resistance of the? Measure to the nearest 1 mm 1? If the burner is physically removed, the air? Method A—Balance Method Resistance to Accelerated Aging Heat and Moisture.
Place the specimens on clean blotting paper or towel for 30 min, then determine the breaking force to break the bond in accordance with Section 42, using clamp-type holding?
Unless damaged, no outer layers need to be removed. Run off approximately mm 1 ft of tape for each determination. Unwind Force at Room Temperature.