ASTM D – Designation: D – 08 Standard Test Methods for Measuring Adhesion by Tape Test. Buy ASTM D TEST METHODS FOR MEASURING ADHESION BY TAPE TEST from SAI Global. ASTM D Historical Standard: ASTM D Standard Test Methods for Measuring Adhesion by Tape Test. SUPERSEDED (see Active link, below).
|Published (Last):||6 November 2018|
|PDF File Size:||17.81 Mb|
|ePub File Size:||1.3 Mb|
|Price:||Free* [*Free Regsitration Required]|
Both concerns are well founded: The intra- and inter-laboratory precision of this test method is similar to other widely-accepted tests for coated substrates d359-08 example, Test Method D and Test Method Dbut this is partly the result of it being insensitive to all but large differences in adhesion.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Check for atness with a straight edge such as that of the tempered steel rule Direct tests include the Hesiometer and the Adherometer 2. Apparatus and Materials Although some rather brittle coatings may exhibit cohesive failure, the tape test adhesion method does not make provision for giving failure locality 7, 8.
But this, in fact, is not their purpose. These test methods were designed for relatively ductile coatings applied to metal substrates, not for coatings often brittle applied to plastic parts 7.
They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required. In actuality, however, this force is distributed over a discrete distance O-A in Fig. It is not unexpected that different operators might obtain different results 12.
The coating has aked along the edges and on parts of the squares. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller. A number in parentheses indicates the year of last reapproval.
Apparatus and Materials 5. The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Further, the tape test does not give an absolute value for the force required for bond rupture, but serves only as an indicator that some minimum value for bond strength was met or exceeded 7, 8.
Criticism of these tests arises when they are used to quantify the strength of adhesive bonding. Differences in tapes used can lead to aetm results as small changes in backing stiffness and adhesive rheology cause large changes in the tension area.
ASTM D – 08 Standard Test Methods for Measuring Adhesion by Tape Test
NOTE 5—Coatings should be applied in accordance with Practice Dor as agreed upon between the purchaser and the seller.
Check for flatness with a straight edge such as that of the tempered steel rule There were no books found for the applied search filters. Justication for the cutting step is reasonable as cutting provides a free edge from which peeling can begin without having to overcome the cohesive strength of the coating layer. Smooth the tape into place by nger in the area of the incisions and then rub rmly with the eraser on the end of a pencil.
A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. Click here to download full list of books. Key steps that directly reflect the importance of operator skill include the angle and rate of tape removal and the visual assessment of the tested sample.
Although some rather brittle coatings aetm exhibit cohesive failure, the tape test adhesion ashm does d3395-08 make provision for giving failure locality 7, 8. Note 1This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.
Some commercial tapes are manufactured to meet minimum standards. Active view current version of standard. Documents Flashcards Grammar checker.
Remove an additional length at a steady that is, not jerked rate and d3359–08 a piece about 75 mm 3 in. A significant compressive force arises from the response of the tape backing material to being stretched. 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.
Key steps that directly reect awtm importance of operator skill include the angle and rate aetm tape removal and the visual assessment of the tested sample.
NOTE 1—This test method has been reported being used to measure adhesion of d3359-08 coatings on soft substrates for example, wood and plastic. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
The axtm scale of 0 to 5 was selected deliberately to avoid a false impression of being sensitive. A similar test method, ISOpermits tests on non-metallic substrates for example, wood and plaster. However, with the tape test, failures within the substrate or coating layers are rare because the tape adhesive is not usually strong enough to exceed the cohesive strengths of normal substrates and organic coatings. Current edition approved Feb.
ASTM D3359 Measuring Adhesion by Tape Test
Limiting the range of rankings from 0 to 5 reflects the inability of this test method to make fine distinctions between levels of adhesion. When the peel angle and rate vary, the force required to remove the tape can change dramatically due to the rheological properties of the backing and adhesive.
These test methods were designed for relatively ductile coatings applied to metal awtm, not for coatings astn brittle applied to plastic parts 7.
Because the substrate and its surface preparation or lack of it have a drastic effect on the adhesion of coatings, a method to evaluate d3359-0 of a coating to different substrates or surface treatments, or of d3359-80 coatings to the same substrate and treatment, is of considerable usefulness in the industry.
If the adhesion strength of the tape has not been determined, report the specific tape used and its manufacturer. Also, Test Method B is not considered suitable for lms thicker than 5 mils m. The color under the transparent tape is a useful indication of when good contact has been made. Cut through the lm to the substrate in one x3359-08 motion using just sufficient pressure on the cutting tool to have the atm edge reach the substrate.
Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. Flaking and detachment worse than Grade 1. Note 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.