Stripping strength tests

Test Method for Resistance of Adhesive Bonds to Chemical Reagents Test Method for Applied Weight per Unit Area of Liquid Adhesive Test Method for Applied Weight per Unit Area of Liquid Adhesive Test Method for Peel or Stripping Strength of Adhesive Bonds Practice for Exposure of Adhesive Specimens to Artificial (Carbon Arc Type) and Natural Light... 

The reinforcing fabrics used were aramid (Kevlar DuPont) and poly(p-pheny-lene-2,6-benzobisoxazole) (PBO) (Zylon Toyobo). The fabrics were first treated with a 1.5% solution of HB PAMAM (AD-102), dried, then interleaved with an epoxy film structural adhesive (epoxy stage B on polyester net), and compression-molded for 90 min at 120 °C. For the aramid-based composite, FM-73 (Cy-tec) was used as the matrix. For the PBO-based composite, AF-191 (3M) was used as the matrix. The laminates were cut into strips and tested for interlaminar shear strength (ASTM D-2344) using a three-point bending instrament. 

One of the simplest peel tests to conduct is the 180° peel test described in ASTM 903, Standard Test Method for Peel or Stripping Strength of Adhesive Bonds. In this test, one adherend is much more flexible than the other, so that upon gripping and pulling the two unbonded ends, the sample assumes the configuration shown in Fig. 8d. 

The long-term strength behaviour test is carried out in the same way as the short-term strength test, namely in single-axis strip tests parallel to the threads (see the tests at 23°C on page 138). Load steps should be set at 10%, 20%, 50% and 90% of the short-time tensile strength. Ten samples are required to be tested for each load step. After 1000 hours the residual strength is established. 

ASTM D903-49(83). Peel or Stripping Strength of Adhesive Bonds, Annual Book of Standards, 15.06, American Society for Testing and Materials, 1986. 

ASTM D903-98 Standard test method for peel or stripping strength of adhesive bonds. 

Peel or Stripping Strength of Adhesive Bonds, Test for (D 903)... 

Peel or Stripping Strength of Adhesive Bonds, Test for (D 903) Climbing Drum Peel Test for Adhesives, Method for (D 1781) Peel Resistance of Adhesives (T-Peel Test), Test for (D 1876) Evaluating Peel Strength of Shoe Sole Attaching Adhesives,... 

Peel strength testing is the most popular method used to measure the bond between the conductor and the substrate. Peel strengths can be measured in the as received condition, after thermal stress, at elevated temperature, and after exposure to processing chemicals. The standard procedure requires that the sample consist of traces or strips of copper foh, or other metal to be tested, and that they be imaged onto the sample using standard printed circuit... 

American Society for Testing and Materials Standard method of test for peel or stripping strength of adhesive boards. ASTM D 90349. Me Graw-Hill Book Co. Inc., New York. (1972). 

D-0903. Test Method for Peel or Stripping Strength of Adhesive Bonds. This is the standard 180 peel test (Fig. 12) applicable where one of the adherends is sufficiently flexible to endure the 180° fold back. Tests the resistance to peel separation of flexible foils, films, or tapes from relatively rigid base adherends (metal, wood, plastic, glass, etc. of adequate thickness). 

The wide-width tensile test with 200 mm width and a 100-mm free length between clamps was specifically developed for GTX-N products with high lateral contraction, low strength, and high strain at rupture to obtain tensile values better related to field conditions than those determined in a strip tensile test. For other GTXs such as GTX-W with low strains, lateral contraction is negligible. 

Empirical attempts have been made to relate strip and grab test results, particularly for cotton fabrics, so that if one strength is known, the other can be calculated. The relationship is complex, depending on fiber strength and modulus, yam size and crimp, yam-to-yam friction, fabric cover factor, weave, weight, and other factors (19). 

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