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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Make sure no air bubbles are trapped. The extension indicator will usually have a separation of 25 mm 1 in. Condition each specimen as described in Section 8. Thoroughly instruct all operators in the proper way to conduct tests safely. Unless damaged, no outer layers need to be removed. If this process applies a preload on the specimen, do not change the balance adjustment to compensate for it. Do not take any readings during the removal of the last 25 mm inch 1d000 tape from the panel.
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.
See also Table 1. After removal from the?
By suitable means, attach this assembly to a scale or other measuring device. By measuring the insulation resistance of tape samples in contact with speci? Allow assembly to dry before measuring the unwound length. Fabric, uncoated or coated. Prepare specimens in accordance with After the tape is on the panel for 20 min These procedures apply to both Class 1 and Class 2 tapes except as noted above. Holding the opposite end of the strip, drape the strip over the rod with ast, adhesive side contacting and asm to the rod see Fig.
D — 10 wind-up roll zstm can be used to either manually or automatically unwind the roll of tape. The curing reaction involved is not reversible, and tapes once heat-cured remain cured. At the start of the unwinding, make sure that the length sensor maintains good contact with the roll and does not slip or bind. Rotate the rod so that the contact point is at the top of the rod see Fig. Remove the specimens from the chamber and condition them as described in 8. For tapes having a backing thickness greater than 0.
Measure the width perpendicular to the edge with the steel scale at three approximately equally-spaced points along the length.
Adhesion to Steel Panel It is acceptable for the faces to be smooth-ground, rubber-coated, or serrated. A satisfactory method of attaching guarded electrodes to the cover and bringing out a terminal for each electrode is shown in Fig.
Follow the procedure described in The usefulness of this test method is primarily for speci?
ASTM D – Testing equipment according to ASTM D | Rycobel
These backings are made from materials such as: From this tape material, prepare specimens as required in the individual test methods. The free-turning wheel or drum of the assembly shall? These tapes are classified as follows: Compare with the prescribed time of failure.
Check with the level to ensure that the wrapped specimen is horizontal. It is essential that the test apparatus, and all associated equipment electrically connected ast it, be properly designed and installed for safe operation. Let it relax for about 2 min or more. One arrangement, suitable for testing a number of tapes at the same time, asfm several rows of electrodes mounted on the inside of the cover of the humidity chamber as shown in Fig.
A tape width of 25 mm 1 in. Immediately test the specimen to prevent misleading results due to drying of the sample. The speed of pen response for recorders is supplied by manufacturers of this equipment.
Take a rubber-covered steel roller as described in Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Length of Tape in a Roll. For tapes of 0. Use clean steel plates. At the end of this period, measure the length of the? Solidly ground all electrically conductive parts that any person might come in contact with during the test. As the winding progresses to the lower end of the rod, insert a short length of lens tissue 3 mm 1?
Attach the weight speci?
D — 10 conditions for a minimum of 24 h before testing. Condition elastomeric backings of Class 2 tapes for cold temperature tests by placing prepared specimens or rolls of tape in a cold room for at least 2 h at aatm desired temperature example temperatures: Design test equipment, test chambers, and test specimens so as to minimize the possibility of such occurrences and to eliminate the possibility of personal injury.