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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Wrap the tape so as to leave a gap between turns of 1 to 1.
Measure the width perpendicular to the edge with the steel scale at three approximately equally-spaced points along the length.
Method A—For Class 1 Tape Breaking Strength and Elongation at Low Temperatures. Historical Version s – view previous versions of standard. Use only full rolls of tape.
ASTM D – Unwind Force of Tapes
The top grip holds the roll of tape so that it can unwind freely and then spool onto the new roll which is attached to the motorized fixture. Breaking Strength and Elongation at Room Temperature.
These tapes are classi? 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 the desired temperature example temperatures: Vinyl chloride and co-polymers. The comparison of dielectric breakdown voltage of different tapes after exposure to widely differing moisture conditions gives an indication of the quality of the compound used in the tape backing as a moisture resistant dielectric material.
Test Specimen Preparation 5. 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 a rupture in the tape.
Unwind Force at Low Temperatures. It is limited in that adhesion to itself or backing only are considered, while in use d10000 are generally adhered to various surfaces. Scrub the panel again using a clean piece of surgical gauze saturated with heptane or any other appropriate solvent Warning—see 3. Increase the voltage from zero to breakdown at a uniform rate of 0.
NOTE 3—If it is desired to run additional tests on the tape in the roll, it is permissible asstm The driven 7 The sole source of supply of the variable-speed unwind machine meeting these requirements known to the committee at this time ast Chemsultants International, Hamilton Drive, Mentor, OH Apply four 6 mm 1? Hang the specimens vertically in the oven at the test temperature with a g weight fastened to one end of each specimen.
Use stainless steel Type or as prescribed in Speci?
Put benchmarks on the specimens, if needed. Continue the test for a prescribed time, or until failure occurs by bond separation.
If you feel that your comments have not received a fair hearing you should make your views known aastm the ASTM Committee on Standards, at the address shown below. If the strip of tape is wider than 14 mm 9? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Unwind Force at Room Temperature.
ASTM D – Testing equipment according to ASTM D | Rycobel
Untwist the tape determining the quadrant of rotation needed to straighten it. Conditioning for Low Temperature Measurements 9. Except for determination of length of tape in a roll, remove and discard a minimum of three layers before removing tape for preparation of test specimens.
NOTE 6—While drum jaws are permissible, they are not preferred. This is usually done by combining one standard? Clamp this portion of the exposed panel in the lower jaw of the testing machine and place the free end of the tape in the upper jaw.
Spirally wrap a second layer in the same direction over the? Do not use them in the vicinity of open? Immerse the panel completely in the test?
It is acceptable for the faces to be smooth-ground, rubber-coated, or serrated. Take readings 15 s after impressing to V dc between the electrodes. After 1 min under tension, slowly tilt the?