ASTM D2061:07(R2021) pdf free download – Standard Test Methods for Strength Tests for Zippers.
Secure the tapes of the zipper in the clamps of the testing machine with the edges of the jaws parallel to and approximately 3 mm (½ in.) from the sides of the bottom stop. which shall be centrally located in the clamps as shown in Fig. 6. Apply the load until the stop pulls apart, until the tape breaks, or until failure of some other kind occurs. Record the nature of the failure and the load at failure to the nearest 2.2 N (0.5 lbf) for values under 222 N (50 lhfl and to the nearest 4.4 N (1 lbf) for values of 222 N and over.
22.5 Bouoiia 5top Holding, Stringer Sepai-a lion —Position the slider body so that its mouth is against the bottom of the stop to he tested. In the case of the entering type bottom stop. position the slider at the point where normally checked in its free movement. Set the opposing clamps of the testing machine approximately 76 mm (3 in.) apart and secure one of the stringers in the upper clamp and the other in the lower clamp of the tensile testing machine approximately 76 mm apart. Secure the stringers in the upper and lower clamps of the testing machine with the slider body positioned along the axis of the clamps and midway between them as shown in Fig. 7. Apply an increasing load until the stop pulls off, until the tape breaks, or until failure of some other kind occurs. Record the nature of the failure and load at failure to the nearest 2.2 N (0.5 lbf) for values under 222 N (50 lbf) and to the nearest 4.4 N lbf for values 222 N and over.
(Fig. 9) in the upper clamp of the testing machine. Then seat the separable pin on the fixture notch as shown in Fig. 9. With a distance of approximately 76 mm (3 in.) hctween the seated end of the pin and the top of the lower clamp, secure the stringer in the lower clamp. Apply an increasing load until the separable pin pulls off, until the tape breaks, or until failure of some other kind occurs. Record the nature of the failure and the load at failure to the nearest 2.2 N (0.5 lbf) for values under 222 N (50 ib and to the nearest 4.4 N (1 IbI) for values 222 N and over.
30.2 Fixed Retainer Pull-Off—Secure the fixture (Fig. 10) in the upper clamp of the testing machine. Separate the two stringers and position the fixed retainer on the upper edges of the slot of the fixture and, with an approximate 76 mm (3 in.) distance between the lower edge of the fixed retainer and the upper edge of the lower clamp, secure the stringer in the lower clamp as shown in Fig. II. Apply an increasing load until the retainer pulls off, until the tape breaks, or until failure of some other kind occurs. Record the nature of the failure and load at failure to the nearest 2.2 N (0.5 lhfl fhr values under 222 N (50 lhfl and to the nearest 4.4 N (1 lhf) for values 222 N and over.