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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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the Department of Defense.
These tapes are classi? These backings are made from materials such as: Vinyl chloride and co-polymers, Vinylidene chloride and co-polymers, and Polyethylene and co-polymers.
ASTM D – Unwind Force of Tapes
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 use.
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. Current edition approved Jan. Originally approved in Last previous edition approved in dd1000 D— No further reproductions authorized. Do not use them in the vicinity of open? They must be stored in closed containers, and it is imperative to clean apparatus in a well-ventilated area.
It is essential that the test apparatus, and all associated equipment electrically connected to it, be properly designed and installed for safe operation. Solidly ground all electrically conductive parts that any person might come in contact with during the test.
Provide means for use, at the completion of any test, to ground any parts which: Thoroughly instruct all operators in the proper way to conduct tests safely. When making high voltage tests, particularly in compressed gas or in oil, it is possible that the energy released at breakdown will be suff? 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. Sample and Specimen Requirements 4.
Any reference to averaging of measurements refers to the averaging of measurements on a single roll and not to the average of all sample rolls. Test Specimen Preparation 5. Except for determination of length of tape asttm a roll, remove and discard a minimum of three adtm before removing tape for preparation of test specimens. Cut the tape with a sharp razor blade or scissors, unless otherwise speci? Place the tape on a smooth clean surface, adhesive side up, or suspend it from one end in free air.
Protect the adhesive surface from dust. From this tape material, prepare specimens as required in the individual test methods.
See also Table 1. 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. Two recommended procedures are 1 to slit the specimen with a sharp razor blade free of nicks while the specimen is held down with a pattern of the desired width, or 2 to slit with mounted parallel sharp razor blades free of nicks to the desired width.
A When referee testing is involved, use an average of 5 determinations wherever 1 or 3 are speci? B Minimum and maximum values are also occasionally required when average values are reported. Actual service results are in? In order that test methods yield consistent and reproducible results, control the temperature and moisture content of the sample or specimen.
Conditioning for Room Temperature Measurements 8. Conditioning for Low Temperature Measurements 9. 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: Apparatus for Low Temperature Conditioning Precision and Bias Measure the width perpendicular to the edge with the steel scale at three approximately equally-spaced points along the length.
Unless damaged, no outer layers need to be removed. Discard any damaged or crushed edges. After conditioning the roll of tape, place it on a table in a vertical position.
Open the jaws of the calipers and slide them over the cut edges of the tape so that the scale shaft is parallel to the table. Close the caliper jaws slowly so as to just touch the sides of the tape roll. Be careful not to crush the edges and keep the caliper jaws perpendicular to the edges of the tape.
Measure the width perpendicular to the edges in mm in. Calibrate the gauge for the actual load exerted by the presser foot. Lower the presser foot onto the tape gradually to minimize any impact force, allowing it to rest upon the tape for 2 s, and then observe the reading to the nearest 0. Make sure no air bubbles are trapped.
Method A—Balance Method Condition each specimen as described in Section 8. Weigh each roll to the nearest 0. After conditioning, measure the relaxed length of the specimen to the nearest 2 mm or 0. NOTE 3—If it aatm desired to run additional tests on the tape in the roll, it is permissible to? Metres per roll 5 weight of roll less core 3 length of specimen, mm weight of specimen 3 1 Yards per roll 5 weight of roll less core 3 length of specimen, in. The apparatus includes a spindle for d100 the tape, the length sensor mechanism, and a read-out and rotating Copyright by ASTM Int’l all rights reserved ; Mon Mar 22 D — 10 wind-up roll that can be used to either manually or automatically unwind the roll of tape.
Use atsm full rolls of tape. Do not remove any outer layer.
Position the roll and length sensor so that the sensor d1000 in contact with the circumference of the roll and the leading end of the roll is directly under the sensor. Zero the sensor and manually pull the leading edge of the tape and?
ASTM D – Testing equipment according to ASTM D | Rycobel
At the start of the unwinding, make sure that the length sensor maintains good contact with the roll and does not slip or bind. After unwinding is completed, take the reading of the length sensor. NOTE 4—It is possible that values obtained in dry ice chambers and walk-in cold rooms will not be equivalent.
The apparatus must be capable of providing smooth, uniform jaw movement during testing, and the rate adjustable in increments necessary to produce strain rates that are speci?
NOTE 5—A high response speed in the recording system is desirable, particularly when relatively high strain rates are employed. The speed of pen response for recorders is supplied by manufacturers of this equipment.
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. If only the latter is obtained, also take load-time data. The extension indicator will usually have a separation of 25 mm 1 in. The design provides a high gripping force with standard air pressure.
Increased air pressure raises the gripping force to accommodate materials that are often difficult to hold in other types of grips. NOTE 6—While drum jaws are permissible, they are not preferred. The design of drum jaws makes it extremely difficult to identify accurately the gauge length between jaws.
D — 10 This is usually done by combining one standard? The choice is determined largely by practical experience with the materials tested.
It is acceptable for the faces to be smooth-ground, rubber-coated, or serrated. In general, the smooth-ground surface offers high gripping efficiency with most?
The rubber-coated surface is of value with materials that tend to be weakened by pinching at the edge of the jaw face.
The serrated surface is recommended for stronger materials that require the greatest gripping action. It is acceptable to use double-coated tape to reinforce gripping, by applying a thin piece of tape on atsm side of the? Use specimens that are the width of the tape as received if possible. 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.
Put d000 on the specimens, if needed. Tighten the movable grip? If this process applies a preload on the specimen, do not change the balance adjustment to compensate for it. Adjust the initial length of the specimen between contact points to mm 4 in. Place the tape in the center of the drums with the edges parallel to the scribed lines. Make a minimum of three acceptable determinations. The adhesion property is also important in determining the uniformity of quality.
The testing machine shall have two clamps with centers in the same plane, parallel with the direction of the motion of the stressing clamp, and so aligned that the clamps will hold the specimen entirely in the same plane.
Use stainless steel Type or as prescribed in Speci? To apply pressure to the specimen, use a roller weighing 6 50 g 4. Construct the roller so that the weight of the handle is not added to the weight of the roller during use. Remove each specimen from asttm roll in accordance with 5.
Scrub the panel again using a clean piece of surgical gauze saturated with heptane or any other appropriate solvent Warning—see 3.